Legg Mason Partners Institutional Trust 旗下基金提交截至2026年8月31日的半年度报告

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-CSR

CERTIFIED SHAREHOLDER REPORT OF REGISTERED
MANAGEMENT INVESTMENT COMPANIES

Investment Company Act file number 811-06740

Legg Mason Partners Institutional Trust

(Exact name of registrant as specified in charter)

One Madison Avenue, 17th Floor, New York, NY 10010

(Address of principal executive offices) (Zip code)

Marc A. De Oliveira

Franklin Templeton

100 First Stamford Place

Stamford, CT 06902

(Name and address of agent for service)

Registrant’s telephone number, including area code: 877-6LM-FUND/656-3863

Date of fiscal year end: February 28

Date of reporting period: August 31, 2026

ITEM 1.

REPORT TO STOCKHOLDERS.

(a) The Report to Shareholders is filed herewith



Western Asset SMASh Series C Fund
	Semi-Annual Shareholder Report \| August 31, 2026

This semi-annual shareholder report contains important information about Western Asset SMASh Series C Fund for the period March 1, 2026, to August 31, 2026.
You can find additional information about the Fund at https://www.franklintempleton.com/regulatory-fund-documents. You can also request this information by contacting us at 877-6LM-FUND/656-3863.

WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)


Fund Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment^*^,^†
Western Asset SMASh Series C Fund¹	$0	0.00%

*	Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.

†	Annualized.

1	Does not reflect the effect of fees and expenses associated with a separately managed account, or a management fee or other operating expenses of the Fund.

KEY FUND STATISTICS (as of August 31, 2026)


Total Net Assets	$278,287,811
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)	201
Portfolio Turnover Rate	4%

WHAT DID THE FUND INVEST IN? (as of August 31, 2026)

Portfolio Composition^* (% of Total Investments)

*	Does not include derivatives, except purchased options, if any.


	WHERE CAN I FIND ADDITIONAL INFORMATION ABOUT THE FUND?
	Additional information is available on https://www.franklintempleton.com/regulatory-fund-documents, including its:
	• prospectus • proxy voting information • financial information • holdings • tax information

Western Asset SMASh Series C Fund

PAGE 1

7937-STSR-1026

true31.014.113.57.25.45.24.63.63.52.62.11.61.40.14.1

(b) Not applicable

ITEM 2.

CODE OF ETHICS.

Not applicable.

ITEM 3.

AUDIT COMMITTEE FINANCIAL EXPERT.

Not applicable.

ITEM 4.

PRINCIPAL ACCOUNTANT FEES AND SERVICES.

Not applicable.

ITEM 5.

AUDIT COMMITTEE OF LISTED REGISTRANTS.

Not applicable.

ITEM 6.

SCHEDULE OF INVESTMENTS.

(a)

Please see schedule of investments contained in the Financial Statements and Financial Highlights included under Item 7 of this Form N-CSR.

(b)

Not applicable.

ITEM 7.

FINANCIAL STATEMENTS AND FINANCIAL HIGHLIGHTS FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

Western Asset
SMASh Series C Fund

Financial Statements and Other Important Information

Semi-Annual | August 31, 2026

If you need assistance accessing this content, please reach out to your sales representative or send an email to [email protected].

Table of Contents

Schedule of Investments	1
Statement of Assets and Liabilities	12
Statement of Operations	13
Statements of Changes in Net Assets	14
Financial Highlights	15
Notes to Financial Statements	16
Changes in and Disagreements with Accountants	28
Results of Meeting(s) of Shareholders	28
Remuneration Paid to Directors, Officers and Others	28
Board Approval of Management and SubadvisoryAgreements	29

franklintempleton.com

Financial Statements and Other Important Information — Semi-Annual

Schedule of Investments (unaudited)

August 31, 2026

Western Asset SMASh Series C Fund

(Percentages shown based on Fund net assets)

Security	Rate	Maturity Date	Face Amount	Value
Corporate Bonds & Notes — 82.9%
Communication Services — 12.9%
Diversified Telecommunication Services — 6.8%
AT&T Inc., Senior Notes	2.250%	2/1/32	$1,360,000	$1,170,479
AT&T Inc., Senior Notes	2.550%	12/1/33	420,000	347,070
AT&T Inc., Senior Notes	5.350%	9/1/40	10,000	9,339
AT&T Inc., Senior Notes	5.550%	8/15/41	240,000	225,135
AT&T Inc., Senior Notes	4.350%	6/15/45	352,000	269,463
AT&T Inc., Senior Notes	3.500%	9/15/53	620,000	378,752
AT&T Inc., Senior Notes	3.800%	12/1/57	6,730,000	4,232,442
Comcast Corp., Senior Notes	4.000%	8/15/47	10,000	6,961
Comcast Corp., Senior Notes	3.969%	11/1/47	600,000	412,172
Comcast Corp., Senior Notes	2.800%	1/15/51	1,580,000	839,066
Comcast Corp., Senior Notes	2.887%	11/1/51	1,180,000	632,605
Comcast Corp., Senior Notes	2.937%	11/1/56	1,194,000	610,857
Telefonica Emisiones SA, Senior Notes	5.213%	3/8/47	490,000	418,667
Verizon Communications Inc., Senior Notes	2.550%	3/21/31	640,000	576,061
Verizon Communications Inc., Senior Notes	2.355%	3/15/32	1,284,000	1,110,974
Verizon Communications Inc., Senior Notes	4.500%	8/10/33	1,890,000	1,793,977
Verizon Communications Inc., Senior Notes	4.400%	11/1/34	130,000	120,651
Verizon Communications Inc., Senior Notes	4.780%	2/15/35	1,204,000	1,137,409
Verizon Communications Inc., Senior Notes	5.250%	3/16/37	1,160,000	1,111,993
Verizon Communications Inc., Senior Notes	2.650%	11/20/40	1,600,000	1,098,764
Verizon Communications Inc., Senior Notes	2.875%	11/20/50	10,000	5,789
Verizon Communications Inc., Senior Notes	3.550%	3/22/51	2,360,000	1,556,987
Verizon Communications Inc., Senior Notes	3.875%	3/1/52	1,230,000	856,734
Total Diversified Telecommunication Services				18,922,347
Entertainment — 0.4%
Discovery Global Holdings Inc., Senior Notes	3.755%	3/15/27	102,000	101,612
Discovery Global Holdings Inc., Senior Notes	4.054%	3/15/29	270,000	267,478
Discovery Global Holdings Inc., Senior Notes	4.279%	3/15/32	494,000	452,284
Discovery Global Holdings Inc., Senior Notes	5.050%	3/15/42	130,000	94,846
Discovery Global Holdings Inc., Senior Notes	5.141%	3/15/52	125,000	84,375
Total Entertainment				1,000,595
Media — 3.8%
Charter Communications Operating LLC/Charter Communications Operating Capital Corp., Senior Secured Notes	5.050%	3/30/29	910,000	902,622

See Notes to Financial Statements.

Western Asset SMASh Series C Fund 2026 Semi-Annual Report

Schedule of Investments (unaudited) (cont’d)

August 31, 2026

Western Asset SMASh Series C Fund

(Percentages shown based on Fund net assets)

Security	Rate	Maturity Date	Face Amount	Value
Media — continued
Charter Communications Operating LLC/Charter Communications Operating Capital Corp., Senior Secured Notes	4.400%	4/1/33	$540,000	$486,367
Charter Communications Operating LLC/Charter Communications Operating Capital Corp., Senior Secured Notes	5.375%	4/1/38	1,620,000	1,409,344
Charter Communications Operating LLC/Charter Communications Operating Capital Corp., Senior Secured Notes	3.500%	3/1/42	290,000	195,365
Charter Communications Operating LLC/Charter Communications Operating Capital Corp., Senior Secured Notes	6.484%	10/23/45	400,000	356,202
Charter Communications Operating LLC/Charter Communications Operating Capital Corp., Senior Secured Notes	5.375%	5/1/47	910,000	705,664
Charter Communications Operating LLC/Charter Communications Operating Capital Corp., Senior Secured Notes	5.125%	7/1/49	2,150,000	1,581,553
Charter Communications Operating LLC/Charter Communications Operating Capital Corp., Senior Secured Notes	4.800%	3/1/50	910,000	648,378
Charter Communications Operating LLC/Charter Communications Operating Capital Corp., Senior Secured Notes	3.900%	6/1/52	1,270,000	772,055
Charter Communications Operating LLC/Charter Communications Operating Capital Corp., Senior Secured Notes	5.500%	4/1/63	90,000	66,381
Fox Corp., Senior Notes	5.576%	1/25/49	920,000	830,520
Time Warner Cable LLC, Senior Secured Notes	6.550%	5/1/37	50,000	48,170
Time Warner Cable LLC, Senior Secured Notes	7.300%	7/1/38	1,510,000	1,517,360
Time Warner Cable LLC, Senior Secured Notes	5.875%	11/15/40	1,150,000	999,989
Total Media				10,519,970
Wireless Telecommunication Services — 1.9%
T-Mobile USA Inc., Senior Notes	2.550%	2/15/31	540,000	484,719
T-Mobile USA Inc., Senior Notes	3.500%	4/15/31	2,000,000	1,864,646
T-Mobile USA Inc., Senior Notes	2.250%	11/15/31	1,690,000	1,464,036
T-Mobile USA Inc., Senior Notes	4.375%	4/15/40	270,000	228,091
T-Mobile USA Inc., Senior Notes	3.000%	2/15/41	1,390,000	981,682
T-Mobile USA Inc., Senior Notes	3.300%	2/15/51	680,000	419,417
Total Wireless Telecommunication Services				5,442,591

Total Communication Services				35,885,503

See Notes to Financial Statements.

Western Asset SMASh Series C Fund 2026 Semi-Annual Report

Western Asset SMASh Series C Fund

(Percentages shown based on Fund net assets)

Security	Rate	Maturity Date	Face Amount	Value

Consumer Discretionary — 3.3%
Automobiles — 0.5%
General Motors Co., Senior Notes	6.600%	4/1/36	$350,000	$368,256
General Motors Co., Senior Notes	5.150%	4/1/38	220,000	204,057
General Motors Co., Senior Notes	6.250%	10/2/43	660,000	645,048
General Motors Co., Senior Notes	5.200%	4/1/45	260,000	223,741
Total Automobiles				1,441,102
Broadline Retail — 1.1%
Amazon.com Inc., Senior Notes	3.100%	5/12/51	3,930,000	2,387,526
Amazon.com Inc., Senior Notes	2.700%	6/3/60	1,100,000	560,035
Total Broadline Retail				2,947,561
Hotels, Restaurants & Leisure — 1.1%
McDonald’s Corp., Senior Notes	3.625%	9/1/49	2,510,000	1,745,360
Sands China Ltd., Senior Notes	2.300%	3/8/27	950,000	939,083
Sands China Ltd., Senior Notes	2.850%	3/8/29	570,000	540,192
Total Hotels, Restaurants & Leisure				3,224,635
Specialty Retail — 0.6%
Home Depot Inc., Senior Notes	4.950%	9/15/52	1,930,000	1,663,389

Total Consumer Discretionary				9,276,687
Consumer Staples — 2.5%
Tobacco — 2.5%
Altria Group Inc., Senior Notes	2.450%	2/4/32	840,000	731,083
Altria Group Inc., Senior Notes	3.400%	2/4/41	920,000	680,475
Altria Group Inc., Senior Notes	3.700%	2/4/51	2,550,000	1,702,227
BAT Capital Corp., Senior Notes	7.750%	10/19/32	2,430,000	2,724,093
Reynolds American Inc., Senior Notes	5.850%	8/15/45	1,130,000	1,073,916

Total Consumer Staples				6,911,794
Energy — 13.4%
Oil, Gas & Consumable Fuels — 13.4%
BP Capital Markets America Inc., Senior Notes	3.001%	3/17/52	2,660,000	1,633,208
Cameron LNG LLC, Senior Secured Notes	2.902%	7/15/31	650,000	588,048 (a)
Cameron LNG LLC, Senior Secured Notes	3.302%	1/15/35	886,000	759,933 (a)
Continental Resources Inc., Senior Notes	5.750%	1/15/31	70,000	70,915 (a)
Devon Energy Corp., Senior Notes	5.600%	7/15/41	750,000	718,873
Devon Energy Corp., Senior Notes	4.750%	5/15/42	660,000	574,732
Devon Energy Corp., Senior Notes	5.000%	6/15/45	680,000	594,218
Diamondback Energy Inc., Senior Notes	3.125%	3/24/31	450,000	415,346
Ecopetrol SA, Senior Notes	5.875%	11/2/51	4,250,000	3,346,090
Energy Transfer LP, Senior Notes	5.250%	4/15/29	180,000	181,611
Energy Transfer LP, Senior Notes	3.750%	5/15/30	1,550,000	1,481,213

See Notes to Financial Statements.

Western Asset SMASh Series C Fund 2026 Semi-Annual Report

Schedule of Investments (unaudited) (cont’d)

August 31, 2026

Western Asset SMASh Series C Fund

(Percentages shown based on Fund net assets)

Security	Rate	Maturity Date	Face Amount	Value

Oil, Gas & Consumable Fuels — continued
Energy Transfer LP, Senior Notes	6.250%	4/15/49	$200,000	$193,922
Enterprise Products Operating LLC, Senior Notes	2.800%	1/31/30	1,280,000	1,198,474
Enterprise Products Operating LLC, Senior Notes	3.700%	1/31/51	210,000	148,182
Enterprise Products Operating LLC, Senior Notes (5.375% to 2/15/28 then 3 mo. Term SOFR + 2.832%)	5.375%	2/15/78	1,620,000	1,619,463 (b)
EOG Resources Inc., Senior Notes	4.950%	4/15/50	3,420,000	2,948,538
EQT Corp., Senior Notes	7.000%	2/1/30	2,250,000	2,379,440
Exxon Mobil Corp., Senior Notes	4.114%	3/1/46	530,000	424,458
Exxon Mobil Corp., Senior Notes	4.327%	3/19/50	1,750,000	1,401,043
Occidental Petroleum Corp., Senior Notes	3.000%	2/15/27	520,000	516,043
Occidental Petroleum Corp., Senior Notes	7.500%	5/1/31	600,000	656,348
Occidental Petroleum Corp., Senior Notes	7.875%	9/15/31	200,000	223,057
Occidental Petroleum Corp., Senior Notes	6.450%	9/15/36	200,000	211,097
Occidental Petroleum Corp., Senior Notes	4.400%	4/15/46	830,000	668,862
Occidental Petroleum Corp., Senior Notes	4.100%	2/15/47	2,290,000	1,690,088
Pertamina Persero PT, Senior Notes	5.625%	5/20/43	2,130,000	1,940,912 (a)
Petrobras Global Finance BV, Senior Notes	6.850%	6/5/2115	1,480,000	1,374,399
Petroleos del Peru SA, Senior Notes	4.750%	6/19/32	1,420,000	1,233,277 (a)
Petroleos Mexicanos, Senior Notes	6.375%	1/23/45	1,100,000	919,587
Petroleos Mexicanos, Senior Notes	6.750%	9/21/47	307,000	257,903
Shell Finance US Inc., Senior Notes	4.550%	8/12/43	880,000	751,817
Shell Finance US Inc., Senior Notes	3.250%	4/6/50	880,000	582,982
Targa Resources Corp., Senior Notes	6.250%	7/1/52	250,000	245,927
Targa Resources Partners LP/Targa Resources Partners Finance Corp., Senior Notes	4.875%	2/1/31	150,000	148,062
Tennessee Gas Pipeline Co. LLC, Senior Notes	2.900%	3/1/30	1,600,000	1,488,134 (a)
Transcontinental Gas Pipe Line Co. LLC, Senior Notes	3.250%	5/15/30	530,000	500,298
Transcontinental Gas Pipe Line Co. LLC, Senior Notes	3.950%	5/15/50	1,130,000	829,089
Western Midstream Operating LP, Senior Notes	4.050%	2/1/30	1,610,000	1,554,259
Western Midstream Operating LP, Senior Notes	5.250%	2/1/50	120,000	101,278
Williams Cos. Inc., Senior Notes	8.750%	3/15/32	10,000	11,662
Williams Cos. Inc., Senior Notes	5.100%	9/15/45	970,000	852,558

Total Energy				37,435,346

See Notes to Financial Statements.

Western Asset SMASh Series C Fund 2026 Semi-Annual Report

Western Asset SMASh Series C Fund

(Percentages shown based on Fund net assets)

Security	Rate	Maturity Date	Face Amount	Value

Financials — 29.6%
Banks — 18.0%
Banco Santander SA, Senior Notes (4.175% to 3/24/27 then 1 year Treasury Constant Maturity Rate + 2.000%)	4.175%	3/24/28	$600,000	$598,316 (b)
Bank of America Corp., Senior Notes	5.000%	1/21/44	1,050,000	946,856
Bank of America Corp., Senior Notes (2.572% to 10/20/31 then SOFR + 1.210%)	2.572%	10/20/32	7,280,000	6,421,497 (b)
Bank of America Corp., Senior Notes (2.972% to 2/4/32 then SOFR + 1.330%)	2.972%	2/4/33	2,840,000	2,531,499 (b)
Bank of Nova Scotia, Subordinated Notes (4.588% to 5/4/32 then 5 year Treasury Constant Maturity Rate + 2.050%)	4.588%	5/4/37	2,820,000	2,677,547 (b)
Barclays PLC, Subordinated Notes (5.088% to 6/20/29 then 3 mo. USD LIBOR + 3.054%)	5.088%	6/20/30	1,330,000	1,325,172 (b)
BNP Paribas SA, Senior Notes (3.052% to 1/13/30 then SOFR + 1.507%)	3.052%	1/13/31	2,910,000	2,715,227 (a)(b)
Citigroup Inc., Senior Notes	8.125%	7/15/39	910,000	1,104,314
Citigroup Inc., Senior Notes (2.572% to 6/3/30 then SOFR + 2.107%)	2.572%	6/3/31	680,000	621,011 (b)
Citigroup Inc., Senior Notes (4.910% to 5/24/32 then SOFR + 2.086%)	4.910%	5/24/33	6,760,000	6,626,493 (b)
Cooperatieve Rabobank UA, Senior Notes (3.758% to 4/6/32 then 1 year Treasury Constant Maturity Rate + 1.420%)	3.758%	4/6/33	1,070,000	991,147 (a)(b)
HSBC Holdings PLC, Subordinated Notes (4.762% to 3/29/32 then SOFR + 2.530%)	4.762%	3/29/33	2,220,000	2,130,593 (b)
JPMorgan Chase & Co., Senior Notes (2.522% to 4/22/30 then SOFR + 2.040%)	2.522%	4/22/31	1,640,000	1,505,359 (b)
JPMorgan Chase & Co., Senior Notes (3.109% to 4/22/50 then SOFR + 2.440%)	3.109%	4/22/51	1,120,000	713,456 (b)
JPMorgan Chase & Co., Senior Notes (3.897% to 1/23/48 then 3 mo. Term SOFR + 1.482%)	3.897%	1/23/49	380,000	284,214 (b)
JPMorgan Chase & Co., Senior Notes (4.032% to 7/24/47 then 3 mo. Term SOFR + 1.722%)	4.032%	7/24/48	1,610,000	1,237,200 (b)
JPMorgan Chase & Co., Senior Notes (4.912% to 7/25/32 then SOFR + 2.080%)	4.912%	7/25/33	6,445,000	6,334,983 (b)
JPMorgan Chase & Co., Subordinated Notes	4.950%	6/1/45	430,000	379,660
JPMorgan Chase & Co., Subordinated Notes (2.956% to 5/13/30 then 3 mo. Term SOFR + 2.515%)	2.956%	5/13/31	430,000	398,885 (b)

See Notes to Financial Statements.

Western Asset SMASh Series C Fund 2026 Semi-Annual Report

Schedule of Investments (unaudited) (cont’d)

August 31, 2026

Western Asset SMASh Series C Fund

(Percentages shown based on Fund net assets)

Security	Rate	Maturity Date	Face Amount	Value

Banks — continued
NatWest Group PLC, Senior Notes (5.076% to 1/27/29 then 3 mo. USD LIBOR + 1.905%)	5.076%	1/27/30	$1,100,000	$1,103,802 (b)
Santander UK Group Holdings PLC, Subordinated Notes	5.625%	9/15/45	500,000	449,222 (a)
US Bancorp, Senior Notes (5.836% to 6/10/33 then SOFR + 2.260%)	5.836%	6/12/34	270,000	276,261 (b)
Wells Fargo & Co., Senior Notes (4.611% to 4/25/52 then SOFR + 2.130%)	4.611%	4/25/53	5,657,000	4,541,942 (b)
Wells Fargo & Co., Senior Notes (5.557% to 7/25/33 then SOFR + 1.990%)	5.557%	7/25/34	2,140,000	2,157,074 (b)
Wells Fargo & Co., Subordinated Notes	4.650%	11/4/44	1,010,000	826,982
Wells Fargo & Co., Subordinated Notes	4.900%	11/17/45	1,220,000	1,025,610
Total Banks				49,924,322
Capital Markets — 6.6%
Goldman Sachs Group Inc., Senior Notes	4.750%	10/21/45	1,520,000	1,280,151
Goldman Sachs Group Inc., Senior Notes (2.908% to 7/21/41 then SOFR + 1.472%)	2.908%	7/21/42	1,120,000	773,504 (b)
Goldman Sachs Group Inc., Senior Notes (3.436% to 2/24/42 then SOFR + 1.632%)	3.436%	2/24/43	1,810,000	1,327,286 (b)
Goldman Sachs Group Inc., Senior Notes (4.223% to 5/1/28 then 3 mo. Term SOFR + 1.563%)	4.223%	5/1/29	880,000	871,536 (b)
Goldman Sachs Group Inc., Subordinated Notes	6.750%	10/1/37	900,000	950,221
Goldman Sachs Group Inc., Subordinated Notes	5.150%	5/22/45	880,000	771,242
Morgan Stanley, Senior Notes (2.699% to 1/22/30 then SOFR + 1.143%)	2.699%	1/22/31	1,310,000	1,211,033 (b)
Morgan Stanley, Senior Notes (6.342% to 10/18/32 then SOFR + 2.560%)	6.342%	10/18/33	5,460,000	5,728,359 (b)
UBS Group AG, Senior Notes (3.126% to 8/13/29 then 3 mo. USD LIBOR + 1.468%)	3.126%	8/13/30	1,970,000	1,866,976 (a)(b)
UBS Group AG, Senior Notes (4.194% to 4/1/30 then SOFR + 3.730%)	4.194%	4/1/31	3,660,000	3,547,828 (a)(b)
Total Capital Markets				18,328,136
Financial Services — 3.6%
AerCap Ireland Capital DAC/AerCap Global Aviation Trust, Senior Notes	3.000%	10/29/28	670,000	643,811
Mastercard Inc., Senior Notes	3.650%	6/1/49	7,960,000	5,714,822
Visa Inc., Senior Notes	4.300%	12/14/45	4,375,000	3,615,679
Total Financial Services				9,974,312
Insurance — 1.4%
MetLife Inc., Senior Notes	4.050%	3/1/45	30,000	23,594

See Notes to Financial Statements.

Western Asset SMASh Series C Fund 2026 Semi-Annual Report

Western Asset SMASh Series C Fund

(Percentages shown based on Fund net assets)

Security	Rate	Maturity Date	Face Amount	Value

Insurance — continued
Teachers Insurance & Annuity Association of America, Subordinated Notes	4.270%	5/15/47	$5,070,000	$3,912,557 (a)
Total Insurance				3,936,151
Mortgage Real Estate Investment Trusts (REITs) — 0.0%††
Blackstone Holdings Finance Co. LLC, Senior Notes	5.000%	6/15/44	90,000	79,544 (a)

Total Financials				82,242,465
Health Care — 6.9%
Biotechnology — 0.9%
AbbVie Inc., Senior Notes	4.400%	11/6/42	1,160,000	988,235
Gilead Sciences Inc., Senior Notes	4.750%	3/1/46	1,640,000	1,415,781
Total Biotechnology				2,404,016
Health Care Providers & Services — 5.0%
Cigna Group, Senior Notes	4.800%	8/15/38	500,000	460,412
Cigna Group, Senior Notes	3.400%	3/15/50	4,870,000	3,212,948
CVS Health Corp., Senior Notes	2.125%	9/15/31	590,000	510,543
CVS Health Corp., Senior Notes	5.125%	7/20/45	2,000,000	1,737,431
Elevance Health Inc., Senior Notes	4.100%	5/15/32	1,100,000	1,040,679
Humana Inc., Senior Notes	2.150%	2/3/32	900,000	770,873
Humana Inc., Senior Notes	4.950%	10/1/44	1,050,000	883,428
Humana Inc., Senior Notes	4.800%	3/15/47	1,750,000	1,408,542
UnitedHealth Group Inc., Senior Notes	4.200%	5/15/32	740,000	710,900
UnitedHealth Group Inc., Senior Notes	4.750%	7/15/45	80,000	68,372
UnitedHealth Group Inc., Senior Notes	4.450%	12/15/48	1,020,000	815,799
UnitedHealth Group Inc., Senior Notes	5.875%	2/15/53	1,340,000	1,288,587
UnitedHealth Group Inc., Senior Notes	3.125%	5/15/60	1,750,000	1,003,463
Total Health Care Providers & Services				13,911,977
Pharmaceuticals — 1.0%
Pfizer Inc., Senior Notes	2.550%	5/28/40	1,640,000	1,152,995
Pfizer Inc., Senior Notes	4.000%	3/15/49	2,170,000	1,632,990
Total Pharmaceuticals				2,785,985

Total Health Care				19,101,978
Industrials — 5.0%
Aerospace & Defense — 3.8%
Boeing Co., Senior Notes	3.250%	2/1/35	1,510,000	1,281,464
Boeing Co., Senior Notes	5.705%	5/1/40	570,000	560,915
Boeing Co., Senior Notes	3.750%	2/1/50	230,000	159,686
Lockheed Martin Corp., Senior Notes	4.500%	5/15/36	1,490,000	1,406,106
Lockheed Martin Corp., Senior Notes	4.090%	9/15/52	6,580,000	4,958,633

See Notes to Financial Statements.

Western Asset SMASh Series C Fund 2026 Semi-Annual Report

Schedule of Investments (unaudited) (cont’d)

August 31, 2026

Western Asset SMASh Series C Fund

(Percentages shown based on Fund net assets)

Security	Rate	Maturity Date	Face Amount	Value

Aerospace & Defense — continued
Northrop Grumman Corp., Senior Notes	4.030%	10/15/47	$2,170,000	$1,656,519
RTX Corp., Senior Notes	4.050%	5/4/47	740,000	570,346
Total Aerospace & Defense				10,593,669
Building Products — 0.1%
Carrier Global Corp., Senior Notes	2.722%	2/15/30	260,000	241,859
Ground Transportation — 1.1%
Union Pacific Corp., Senior Notes	2.891%	4/6/36	1,450,000	1,197,728
Union Pacific Corp., Senior Notes	3.839%	3/20/60	1,890,000	1,295,816
Union Pacific Corp., Senior Notes	3.750%	2/5/70	920,000	600,121
Total Ground Transportation				3,093,665

Total Industrials				13,929,193
Information Technology — 1.5%
Semiconductors & Semiconductor Equipment — 0.9%
Broadcom Inc., Senior Notes	4.150%	11/15/30	189,000	181,480
Broadcom Inc., Senior Notes	3.137%	11/15/35	940,000	756,905
Broadcom Inc., Senior Notes	3.187%	11/15/36	90,000	71,043
Intel Corp., Senior Notes	4.750%	3/25/50	1,240,000	976,251
Intel Corp., Senior Notes	3.050%	8/12/51	820,000	483,735
Total Semiconductors & Semiconductor Equipment				2,469,414
Software — 0.6%
Oracle Corp., Senior Notes	3.250%	5/15/30	1,910,000	1,741,665

Total Information Technology				4,211,079
Materials — 3.4%
Metals & Mining — 1.9%
Freeport-McMoRan Inc., Senior Notes	5.450%	3/15/43	2,500,000	2,349,847
Southern Copper Corp., Senior Notes	5.250%	11/8/42	3,260,000	3,007,698
Total Metals & Mining				5,357,545
Paper & Forest Products — 1.5%
Celulosa Arauco y Constitucion SA, Senior Notes	5.500%	4/30/49	1,740,000	1,459,843 (a)
Suzano Austria GmbH, Senior Notes	6.000%	1/15/29	2,670,000	2,703,927
Total Paper & Forest Products				4,163,770

Total Materials				9,521,315
Real Estate — 0.1%
Retail REITs — 0.1%
WEA Finance LLC/Westfield UK & Europe Finance PLC, Senior Notes	4.750%	9/17/44	200,000	166,546 (a)

See Notes to Financial Statements.

Western Asset SMASh Series C Fund 2026 Semi-Annual Report

Western Asset SMASh Series C Fund

(Percentages shown based on Fund net assets)

Security	Rate	Maturity Date	Face Amount	Value

Utilities — 4.3%
Electric Utilities — 4.3%
American Transmission Systems Inc., Senior Notes	2.650%	1/15/32	$2,400,000	$2,119,121 (a)
Duke Energy Indiana LLC, First Mortgage Bonds	3.250%	10/1/49	220,000	143,994
FirstEnergy Corp., Senior Notes	4.850%	7/15/47	5,870,000	4,853,358
MidAmerican Energy Co., First Mortgage Bonds	3.950%	8/1/47	1,581,000	1,198,704
Pacific Gas and Electric Co., First Mortgage Bonds	2.100%	8/1/27	802,000	783,274
Pacific Gas and Electric Co., First Mortgage Bonds	3.500%	8/1/50	190,000	121,032
Perusahaan Perseroan Persero PT Perusahaan Listrik Negara, Senior Notes	4.375%	2/5/50	4,000,000	2,873,903 (a)

Total Utilities				12,093,386
Total Corporate Bonds & Notes (Cost — $252,226,225)				230,775,292
Asset-Backed Securities — 5.2%
AIMCO CLO Ltd., 2021-15A AR (3 mo. Term SOFR + 1.200%)	4.950%	4/17/38	6,500,000	6,507,827 (a)(b)
Bayfront IABS Pte Ltd., 8A A (SOFR + 1.380%)	5.060%	7/11/47	3,450,000	3,451,947 (a)(b)
Elevation CLO Ltd., 2025-18A A1 (3 mo. Term SOFR + 1.240%)	4.969%	3/28/38	2,360,000	2,362,083 (a)(b)
OHA Loan Funding Ltd., 2013-2A AR2 (3 mo. Term SOFR + 1.220%)	4.949%	10/20/38	2,000,000	2,003,983 (a)(b)

Total Asset-Backed Securities (Cost — $14,301,009)				14,325,840
U.S. Government & Agency Obligations — 1.9%
U.S. Government Obligations — 1.9%
U.S. Treasury Bonds	5.000%	5/15/46	5,540,000	5,377,695
U.S. Treasury Bonds	1.375%	8/15/50	10,000	4,670
U.S. Treasury Bonds	4.000%	11/15/52	10,000	8,177

Total U.S. Government & Agency Obligations (Cost — $5,490,440)				5,390,542
Sovereign Bonds — 1.4%
Israel — 0.7%
Israel Government International Bond, Senior Notes	4.125%	1/17/48	2,440,000	1,833,863
Kazakhstan — 0.7%
Kazakhstan Government International Bond, Senior Notes	4.875%	10/14/44	2,130,000	1,904,376 (a)

Total Sovereign Bonds (Cost — $4,224,347)				3,738,239
Total Investments before Short-Term Investments (Cost — $276,242,021)				254,229,913

See Notes to Financial Statements.

Western Asset SMASh Series C Fund 2026 Semi-Annual Report

Schedule of Investments (unaudited) (cont’d)

August 31, 2026

Western Asset SMASh Series C Fund

(Percentages shown based on Fund net assets)

Security	Rate	Maturity Date	Face Amount	Value

Short-Term Investments — 3.9%
Goldman Sachs Group Inc. repurchase agreement dated 8/31/26; Proceeds at maturity — $11,001,094; (Fully collateralized by U.S. government obligations, 2.375% due 2/15/42; Market value — $11,215,701) (Cost — $11,000,000)	3.580%	9/1/26	$11,000,000	$11,000,000
Total Investments — 95.3% (Cost — $287,242,021)				265,229,913
Other Assets in Excess of Liabilities — 4.7%				13,057,898
Total Net Assets — 100.0%				$278,287,811

††

Represents less than 0.1%.

(a)

Security is exempt from registration under Rule 144A of the Securities Act of 1933. This security may be resold in

transactions that are exempt from registration, normally to qualified institutional buyers. This security has been

deemed liquid pursuant to guidelines approved by the Board of Trustees.

(b)

Variable rate security. Interest rate disclosed is as of the most recent information available. Certain variable rate

securities are not based on a published reference rate and spread but are determined by the issuer or agent and

are based on current market conditions. These securities do not indicate a reference rate and spread in their

description above.

Abbreviation(s) used in this schedule:
CLO	—	Collateralized Loan Obligation
DAC	—	Designated Activity Company
LIBOR	—	London Interbank Offered Rate
SOFR	—	Secured Overnight Financing Rate
USD	—	United States Dollar

See Notes to Financial Statements.

Western Asset SMASh Series C Fund 2026 Semi-Annual Report

Western Asset SMASh Series C Fund

At August 31, 2026, the Fund had the following open futures contracts:

	Number of Contracts	Expiration Date	Notional Amount	Market Value	Unrealized Appreciation (Depreciation)
Contracts to Buy:
U.S. Treasury 2-Year Notes	210	12/26	$43,200,036	$43,099,219	$(100,817 )
U.S. Treasury 5-Year Notes	428	12/26	45,437,543	45,240,940	(196,603 )
U.S. Treasury Long-Term Bonds	502	12/26	54,807,148	54,529,750	(277,398 )
U.S. Treasury Ultra 10-Year Notes	38	12/26	4,164,610	4,158,031	(6,579 )
					(581,397 )
Contracts to Sell:
U.S. Treasury 10-Year Notes	424	12/26	46,042,365	45,646,250	396,115
U.S. Treasury Ultra Long-Term Bonds	150	12/26	16,695,934	16,504,688	191,246
					587,361
Net unrealized appreciation on open futures contracts					$5,964

At August 31, 2026, the Fund had the following open swap contracts:

CENTRALLY CLEARED CREDIT DEFAULT SWAPS ON CREDIT INDICES — SELL PROTECTION1

Reference Entity

Notional

Amount2

Termination

Date

Periodic

Payments

Received by

the Fund†

Market

Value3

Upfront

Premiums

Paid

(Received)

Unrealized

Appreciation

Markit CDX.NA.IG.46 Index

$236,439,000

6/20/31

1.000% quarterly

$5,056,437

$3,554,274

$1,502,163

1	If the Fund is a seller of protection and a credit event occurs, as defined under the terms of that particular swap agreement, the Fund will either (i) pay to the buyer of protection an amount equal to the notional amount of the swap and take delivery of the referenced obligation or underlying securities comprising the referenced index or (ii) pay a net settlement amount in the form of cash or securities equal to the notional amount of the swap less the recovery value of the referenced obligation or underlying securities comprising the referenced index.
2	The maximum potential amount the Fund could be required to pay as a seller of credit protection or receive as a buyer of credit protection if a credit event occurs as defined under the terms of that particular swap agreement.
3	The quoted market prices and resulting values for credit default swap agreements on asset-backed securities and credit indices serve as an indicator of the current status of the payment/performance risk and represent the likelihood of an expected loss (or profit) for the credit derivative had the notional amount of the swap agreement been closed/sold as of the period end. Decreasing market values (sell protection) or increasing market values (buy protection), when compared to the notional amount of the swap, represent a deterioration of the referenced entity’s credit soundness and a greater likelihood or risk of default or other credit event occurring as defined under the terms of the agreement.
†	Percentage shown is an annual percentage rate.

See Notes to Financial Statements.

Western Asset SMASh Series C Fund 2026 Semi-Annual Report

Statement of Assets and Liabilities (unaudited)

August 31, 2026

Assets:
Investments, at value (Cost — $287,242,021)	$265,229,913
Cash	3,370,776
Deposits with brokers for centrally cleared swap contracts	4,887,767
Interest receivable	3,491,227
Deposits with brokers for open futures contracts	1,752,596
Receivable for Fund shares sold	54,367
Receivable from brokers — net variation margin on centrally cleared swap contracts	24,699
Receivable from investment manager	19,793
Prepaid expenses	11,966
Total Assets	278,843,104
Liabilities:
Payable for Fund shares repurchased	316,169
Payable to brokers — net variation margin on open futures contracts	155,077
Fund accounting fees payable	30,182
Trustees’ fees payable	570
Accrued expenses	53,295
Total Liabilities	555,293
Total Net Assets	$278,287,811
Net Assets:
Par value (Note 5)	$316
Paid-in capital in excess of par value	347,784,103
Total distributable earnings (loss)	(69,496,608 )
Total Net Assets	$278,287,811
Shares Outstanding	31,632,278
Net Asset Value	$8.80

See Notes to Financial Statements.

Western Asset SMASh Series C Fund 2026 Semi-Annual Report

Statement of Operations (unaudited)

For the Six Months Ended August 31, 2026

Investment Income:
Interest	$7,821,813
Total Investment Income	7,821,813
Expenses:
Fund accounting fees	34,745
Audit and tax fees	20,726
Registration fees	13,193
Legal fees	10,641
Shareholder reports	10,605
Commodity pool reports	6,049
Trustees’ fees	5,103
Custody fees	1,867
Commitment fees (Note 6)	1,413
Transfer agent fees (Note 2)	1,149
Miscellaneous expenses	6,678
Total Expenses	112,169
Less: Fee waivers and/or expense reimbursements (Note 2)	(112,169 )
Net Expenses	—
Net Investment Income	7,821,813
Realized and Unrealized Gain (Loss) on Investments, Futures Contracts and Swap Contracts (Notes 1, 3 and 4):
Net Realized Gain (Loss) From:
Investment transactions	1,503,582
Futures contracts	(2,076,464 )
Swap contracts	1,440,131
Net Realized Gain	867,249
Change in Net Unrealized Appreciation (Depreciation) From:
Investments	(15,953,894 )
Futures contracts	213,489
Swap contracts	2,527,118
Change in Net Unrealized Appreciation (Depreciation)	(13,213,287 )
Net Loss on Investments, Futures Contracts and Swap Contracts	(12,346,038 )
Decrease in Net Assets From Operations	$(4,524,225 )

See Notes to Financial Statements.

Western Asset SMASh Series C Fund 2026 Semi-Annual Report

Statements of Changes in Net Assets

For the Six Months Ended August 31, 2026 (unaudited) and the Year Ended February 28, 2026	August 31	February 28
Operations:
Net investment income	$7,821,813	$18,695,004
Net realized gain	867,249	8,558,790
Change in net unrealized appreciation (depreciation)	(13,213,287 )	2,712,034
Increase (Decrease) in Net Assets From Operations	(4,524,225 )	29,965,828
Distributions to Shareholders From (Note 1):
Total distributable earnings	(9,262,370 )	(22,713,910 )
Decrease in Net Assets From Distributions to Shareholders	(9,262,370 )	(22,713,910 )
Fund Share Transactions (Note 5):
Net proceeds from sale of shares	22,631,040	41,300,694
Cost of shares repurchased	(66,411,793 )	(150,387,511 )
Decrease in Net Assets From Fund Share Transactions	(43,780,753 )	(109,086,817 )
Decrease in Net Assets	(57,567,348 )	(101,834,899 )
Net Assets:
Beginning of period	335,855,159	437,690,058
End of period	$278,287,811	$335,855,159

See Notes to Financial Statements.

Western Asset SMASh Series C Fund 2026 Semi-Annual Report

Financial Highlights

For a share of beneficial interest outstanding throughout each year ended February 28, unless otherwise noted:
	20261,2	20261	20251	20241,3	20231	20221
Net asset value, beginning of period	$9.20	$8.98	$9.16	$8.92	$9.10	$9.68
Income (loss) from operations:
Net investment income	0.23	0.46	0.47	0.45	0.37	0.29
Net realized and unrealized gain (loss)	(0.36 )	0.32	(0.08 )4	0.33	(0.10 )	(0.51 )
Total income (loss) from operations	(0.13)	0.78	0.39	0.78	0.27	(0.22)
Less distributions from:
Net investment income	(0.27 )	(0.56 )	(0.57 )	(0.54 )	(0.45 )	(0.36 )
Total distributions	(0.27 )	(0.56 )	(0.57 )	(0.54 )	(0.45 )	(0.36 )
Net asset value, end of period	$8.80	$9.20	$8.98	$9.16	$8.92	$9.10
Total return5	(1.43 )%	9.00 %	4.36 %	9.07 %	3.09 %	(2.43 )%
Net assets, end of period (millions)	$278	$336	$438	$1,147	$1,214	$1,740
Ratios to average net assets:
Gross expenses6	0.07 %7	0.06 %	0.03 %	0.03 %	0.02 %	0.02 %
Net expenses8,9	0.00 7	0.00	0.00	0.00	0.00	0.00
Net investment income	5.03 7	5.09	5.06	5.04	4.20	3.04
Portfolio turnover rate	4 %	4 %	6 %	7 %	44 %	12 %

1	Per share amounts have been calculated using the average shares method.
2	For the six months ended August 31, 2026 (unaudited).
3	For the year ended February 29.
4	Calculation of the net loss per share (both realized and unrealized) does not correlate to the aggregate realized and unrealized gain presented in the Statement of Operations due to the timing of sales and repurchases of Fund shares.
5	Performance figures do not reflect the effect of fees and expenses associated with a separately managed account, nor a management fee or other operating expenses of the Fund. Such management fees are paid directly or indirectly by the separately managed account sponsor to the Fund’s manager or subadvisers. All operating expenses of the Fund were reimbursed by the manager, pursuant to an expense reimbursement arrangement between the Fund and the manager. If such fees were included, the total return would have been lower. Past performance is no guarantee of future results. Total returns for periods of less than one year are not annualized.
6	Gross expenses do not include management fees paid to the manager and subadvisers. Management fees are paid directly or indirectly by the separately managed account sponsor.
7	Annualized.
8	The Fund’s manager has entered into an expense reimbursement arrangement with the Fund, pursuant to which the Fund’s manager has agreed to reimburse 100% of the Fund’s ordinary operating expenses. The expense reimbursement arrangement does not cover interest, brokerage, taxes and extraordinary expenses. This arrangement cannot be terminated prior to December 31, 2027 without the Board of Trustees’ consent.
9	Reflects fee waivers and/or expense reimbursements.

See Notes to Financial Statements.

Western Asset SMASh Series C Fund 2026 Semi-Annual Report

Notes to Financial Statements (unaudited)

1. Organization and significant accounting policies

Western Asset SMASh Series C Fund (the “Fund”) is a separate diversified investment series of Legg Mason Partners Institutional Trust (the “Trust”). The Trust, a Maryland statutory trust, is registered under the Investment Company Act of 1940, as amended (the “1940 Act”), as an open-end management investment company.

Shares of the Fund may be purchased only by or on behalf of separately managed account clients where an affiliate of Franklin Templeton Fund Adviser, LLC (“FTFA”) has an agreement to serve as investment adviser or subadviser (each affiliate, a “Managed Account Adviser”) to the account with the managed account program sponsor (the “Program Sponsor”) (typically, a registered investment adviser or broker/dealer) or directly with the client. Shareholders of the Fund pay fees to their separately managed account sponsor, some of which are paid to affiliates of FTFA. FTFA and the subadvisers do not charge investment management fees to the Fund.

The Fund follows the accounting and reporting guidance in Financial Accounting Standards Board (“FASB”) Accounting Standards Codification Topic 946, Financial Services – Investment Companies (“ASC 946”). The following are significant accounting policies consistently followed by the Fund and are in conformity with U.S. generally accepted accounting principles (“GAAP”), including, but not limited to, ASC 946. Estimates and assumptions are required to be made regarding assets, liabilities and changes in net assets resulting from operations when financial statements are prepared. Changes in the economic environment, financial markets and any other parameters used in determining these estimates could cause actual results to differ. Subsequent events have been evaluated through the date the financial statements were issued.

(a) Investment valuation. The valuations for fixed income securities (which may include, but are not limited to, corporate, government, municipal, mortgage-backed, collateralized mortgage obligations and asset-backed securities) and certain derivative instruments are typically the prices supplied by independent third party pricing services, which may use market prices or broker/dealer quotations or a variety of valuation techniques and methodologies. The independent third party pricing services typically use inputs that are observable such as issuer details, interest rates, yield curves, prepayment speeds, credit risks/spreads, default rates and quoted prices for similar securities. Investments in open-end funds are valued at the closing net asset value per share of each fund on the day of valuation. Futures contracts are valued daily at the settlement price established by the board of trade or exchange on which they are traded. Equity securities for which market quotations are available are valued at the last reported sales price or official closing price on the primary market or exchange on which they trade. When the Fund holds securities or other assets that are denominated in a foreign currency, the Fund will normally use the currency exchange rates as of 4:00 p.m. (Eastern Time). If independent third party pricing services are unable to supply prices for a portfolio investment, or if the prices supplied are deemed by the manager to be unreliable, the market price may be determined by the manager using quotations from one or more broker/dealers or at the transaction price if the security has recently been purchased and no value has yet been obtained from a pricing service or pricing broker. When reliable prices are not readily available, such as when the value of a security has been significantly affected by events after the close of the exchange

Western Asset SMASh Series C Fund 2026 Semi-Annual Report

or market on which the security is principally traded, but before the Fund calculates its net asset value, the Fund values these securities as determined in accordance with procedures approved by the Fund’s Board of Trustees (the “Board”).

Pursuant to policies adopted by the Board, the Fund’s manager has been designated as the valuation designee and is responsible for the oversight of the daily valuation process. The Fund’s manager is assisted by the Global Fund Valuation Committee (the “Valuation Committee”). The Valuation Committee is responsible for making fair value determinations, evaluating the effectiveness of the Fund’s pricing policies, and reporting to the Fund’s manager and the Board. When determining the reliability of third party pricing information for investments owned by the Fund, the Valuation Committee, among other things, conducts due diligence reviews of pricing vendors, monitors the daily change in prices and reviews transactions among market participants.

The Valuation Committee will consider pricing methodologies it deems relevant and appropriate when making fair value determinations. Examples of possible methodologies include, but are not limited to, multiple of earnings; discount from market of a similar freely traded security; discounted cash-flow analysis; book value or a multiple thereof; risk premium/yield analysis; yield to maturity; and/or fundamental investment analysis. The Valuation Committee will also consider factors it deems relevant and appropriate in light of the facts and circumstances. Examples of possible factors include, but are not limited to, the type of security; the issuer’s financial statements; the purchase price of the security; the discount from market value of unrestricted securities of the same class at the time of purchase; analysts’ research and observations from financial institutions; information regarding any transactions or offers with respect to the security; the existence of merger proposals or tender offers affecting the security; the price and extent of public trading in similar securities of the issuer or comparable companies; and the existence of a shelf registration for restricted securities.

For each portfolio security that has been fair valued pursuant to the policies adopted by the Board, the fair value price is compared against the last available and next available market quotations. The Valuation Committee reviews the results of such back testing monthly and fair valuation occurrences are reported to the Board quarterly.

The Fund uses valuation techniques to measure fair value that are consistent with the market approach and/or income approach, depending on the type of security and the particular circumstance. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable securities. The income approach uses valuation techniques to discount estimated future cash flows to present value.

Western Asset SMASh Series C Fund 2026 Semi-Annual Report

Notes to Financial Statements (unaudited) (cont’d)

GAAP establishes a disclosure hierarchy that categorizes the inputs to valuation techniques used to value assets and liabilities at measurement date. These inputs are summarized in the three broad levels listed below:

•

Level 1 — unadjusted quoted prices in active markets for identical investments

•

Level 2 — other significant observable inputs (including quoted prices for similar investments, interest rates, prepayment speeds, credit risk, etc.)

•

Level 3 — significant unobservable inputs (including the Fund’s own assumptions in determining the fair value of investments)

The inputs or methodologies used to value securities are not necessarily an indication of the risk associated with investing in those securities.

The following is a summary of the inputs used in valuing the Fund’s assets and liabilities carried at fair value:

ASSETS
Description	Quoted Prices (Level 1)	Other Significant Observable Inputs (Level 2)	Significant Unobservable Inputs (Level 3)	Total
Long-Term Investments†:
Corporate Bonds & Notes	—	$230,775,292	—	$230,775,292
Asset-Backed Securities	—	14,325,840	—	14,325,840
U.S. Government & Agency Obligations	—	5,390,542	—	5,390,542
Sovereign Bonds	—	3,738,239	—	3,738,239
Total Long-Term Investments	—	254,229,913	—	254,229,913
Short-Term Investments†	—	11,000,000	—	11,000,000
Total Investments	—	$265,229,913	—	$265,229,913
Other Financial Instruments:
Futures Contracts††	$587,361	—	—	$587,361
Centrally Cleared Credit Default Swaps on Credit Indices — Sell Protection††	—	$1,502,163	—	1,502,163
Total Other Financial Instruments	$587,361	$1,502,163	—	$2,089,524
Total	$587,361	$266,732,076	—	$267,319,437
LIABILITIES
Description	Quoted Prices (Level 1)	Other Significant Observable Inputs (Level 2)	Significant Unobservable Inputs (Level 3)	Total
Other Financial Instruments:
Futures Contracts††	$581,397	—	—	$581,397

Western Asset SMASh Series C Fund 2026 Semi-Annual Report

†	See Schedule of Investments for additional detailed categorizations.
††	Reflects the unrealized appreciation (depreciation) of the instruments.

(b) Futures contracts. The Fund uses futures contracts generally to gain exposure to, or hedge against, changes in interest rates or gain exposure to, or hedge against, changes in certain asset classes. A futures contract represents a commitment for the future purchase or sale of an asset at a specified price on a specified date.

Upon entering into a futures contract, the Fund is required to deposit cash or securities with a broker in an amount equal to a certain percentage of the contract amount. This is known as the ‘‘initial margin’’ and subsequent payments (‘‘variation margin’’) are made or received by the Fund each day, depending on the daily fluctuation in the value of the contract. For certain futures, including foreign denominated futures, variation margin is not settled daily, but is recorded as a net variation margin payable or receivable. The daily changes in contract value are recorded as unrealized appreciation or depreciation in the Statement of Operations and the Fund recognizes a realized gain or loss when the contract is closed.

Futures contracts involve, to varying degrees, risk of loss in excess of the amounts reflected in the financial statements. In addition, there is the risk that the Fund may not be able to enter into a closing transaction because of an illiquid secondary market.

(c) Swap agreements. The Fund invests in swaps for the purpose of managing its exposure to interest rate, credit or market risk, or for other purposes. The use of swaps involves risks that are different from those associated with other portfolio transactions. Swap agreements are privately negotiated in the over-the-counter market and may be entered into as a bilateral contract (“OTC Swaps”) or centrally cleared (“Centrally Cleared Swaps”). Unlike Centrally Cleared Swaps, the Fund has credit exposure to the counterparties of OTC Swaps.

In a Centrally Cleared Swap, immediately following execution of the swap, the swap agreement is submitted to a clearinghouse or central counterparty (the “CCP”) and the CCP becomes the ultimate counterparty of the swap agreement. The Fund is required to interface with the CCP through a broker, acting in an agency capacity. All payments are settled with the CCP through the broker. Upon entering into a Centrally Cleared Swap, the Fund is required to deposit initial margin with the broker in the form of cash or securities.

Swap contracts are marked-to-market daily and changes in value are recorded as unrealized appreciation (depreciation). The daily change in valuation of Centrally Cleared Swaps, if any, is recorded as a net receivable or payable for variation margin on the Statement of Assets and Liabilities. Gains or losses are realized upon termination of the swap agreement. Collateral, in the form of restricted cash or securities, may be required to be held in segregated accounts with the Fund’s custodian in compliance with the terms of the swap contracts. Securities posted as collateral for swap contracts are identified in the Schedule of Investments and restricted cash, if any, is identified on the Statement of Assets and Liabilities. Risks may exceed amounts recorded in the Statement of Assets and Liabilities. These risks include changes in the returns of the underlying instruments, failure

Western Asset SMASh Series C Fund 2026 Semi-Annual Report

Notes to Financial Statements (unaudited) (cont’d)

of the counterparties to perform under the contracts’ terms, and the possible lack of liquidity with respect to the swap agreements.

OTC Swap payments received or made at the beginning of the measurement period are reflected as a premium or deposit, respectively, on the Statement of Assets and Liabilities. These upfront payments are amortized over the life of the swap and are recognized as realized gain or loss in the Statement of Operations. Net periodic payments received or paid by the Fund are recognized as a realized gain or loss in the Statement of Operations.

The Fund’s maximum exposure in the event of a defined credit event on a credit default swap to sell protection is the notional amount. As of August 31, 2026, the total notional value of all credit default swaps to sell protection was $236,439,000. This amount would be offset by the value of the swap’s reference entity, upfront premiums received on the swap and any amounts received from the settlement of a credit default swap where the Fund bought protection for the same referenced security/entity.

For average notional amounts of swaps held during the six months ended August 31, 2026, see Note 4.

Credit default swaps

The Fund enters into credit default swap (“CDS”) contracts for investment purposes, to manage its credit risk or to add leverage. CDS agreements involve one party making a stream of payments to another party in exchange for the right to receive a specified return in the event of a default by a third party, typically corporate or sovereign issuers, on a specified obligation, or in the event of a write-down, principal shortfall, interest shortfall or default of all or part of the referenced entities comprising a credit index. The Fund may use a CDS to provide protection against defaults of the issuers (i.e., to reduce risk where the Fund has exposure to an issuer) or to take an active long or short position with respect to the likelihood of a particular issuer’s default. As a seller of protection, the Fund generally receives an upfront payment or a stream of payments throughout the term of the swap, provided that there is no credit event. If the Fund is a seller of protection and a credit event occurs, as defined under the terms of that particular swap agreement, the maximum potential amount of future payments (undiscounted) that the Fund could be required to make under a CDS agreement would be an amount equal to the notional amount of the agreement. These amounts of potential payments will be partially offset by any recovery of values from the respective referenced obligations. As a seller of protection, the Fund effectively adds leverage to its portfolio because, in addition to its total net assets, the Fund is subject to investment exposure on the notional amount of the swap. As a buyer of protection, the Fund generally receives an amount up to the notional value of the swap if a credit event occurs.

Implied spreads are the theoretical prices a lender receives for credit default protection. When spreads rise, market perceived credit risk rises and when spreads fall, market perceived credit risk falls. The implied credit spread of a particular referenced entity reflects the cost of buying/selling protection and may include upfront payments required to enter into the agreement. Wider credit spreads and decreasing market values, when compared to the notional amount of the swap, represent a deterioration of the referenced entity’s credit

Western Asset SMASh Series C Fund 2026 Semi-Annual Report

soundness and a greater likelihood or risk of default or other credit event occurring as defined under the terms of the agreement. Credit spreads utilized in determining the period end market value of CDS agreements on corporate or sovereign issues are disclosed in the Schedule of Investments and serve as an indicator of the current status of the payment/performance risk and represent the likelihood or risk of default for credit derivatives. For CDS agreements on asset-backed securities and credit indices, the quoted market prices and resulting values, particularly in relation to the notional amount of the contract as well as the annual payment rate, serve as an indication of the current status of the payment/performance risk.

The Fund’s maximum risk of loss from counterparty risk, as the protection buyer, is the fair value of the contract (this risk is mitigated by the posting of collateral by the counterparty to the Fund to cover the Fund’s exposure to the counterparty). As the protection seller, the Fund’s maximum risk is the notional amount of the contract. CDS are considered to have credit risk-related contingent features since they require payment by the protection seller to the protection buyer upon the occurrence of a defined credit event.

Entering into a CDS agreement involves, to varying degrees, elements of credit, market and documentation risk in excess of the related amounts recognized on the Statement of Assets and Liabilities. Such risks involve the possibility that there will be no liquid market for these agreements, that the counterparty to the agreement may default on its obligation to perform or disagree as to the meaning of the contractual terms in the agreement, and that there will be unfavorable changes in net interest rates.

(d) Repurchase agreements. The Fund may enter into repurchase agreements with institutions that its subadviser has determined are creditworthy. Each repurchase agreement is recorded at cost. Under the terms of a typical repurchase agreement, the Fund acquires a debt security subject to an obligation of the seller to repurchase, and of the Fund to resell, the security at an agreed-upon price and time, thereby determining the yield during the Fund’s holding period. When entering into repurchase agreements, it is the Fund’s policy that its custodian or a third party custodian, acting on the Fund’s behalf, take possession of the underlying collateral securities, the market value of which, at all times, at least equals the principal amount of the repurchase transaction, including accrued interest. To the extent that any repurchase transaction maturity exceeds one business day, the value of the collateral is marked-to-market and measured against the value of the agreement in an effort to ensure the adequacy of the collateral. If the counterparty defaults, the Fund generally has the right to use the collateral to satisfy the terms of the repurchase transaction. However, if the market value of the collateral declines during the period in which the Fund seeks to assert its rights or if bankruptcy proceedings are commenced with respect to the seller of the security, realization of the collateral by the Fund may be delayed or limited.

(e) Credit and market risk. The Fund invests in high-yield and emerging market instruments that are subject to certain credit and market risks. The yields of high-yield and emerging market debt obligations reflect, among other things, perceived credit and market risks. The Fund’s investments in securities rated below investment grade typically involve

Western Asset SMASh Series C Fund 2026 Semi-Annual Report

Notes to Financial Statements (unaudited) (cont’d)

risks not associated with higher rated securities including, among others, greater risk related to timely and ultimate payment of interest and principal, greater market price volatility and less liquid secondary market trading. The consequences of political, social, economic or diplomatic changes may have disruptive effects on the market prices of investments held by the Fund. The Fund’s investments in non-U.S. dollar denominated securities may also result in foreign currency losses caused by devaluations and exchange rate fluctuations.

(f) Foreign investment risks. The Fund’s investments in foreign securities may involve risks not present in domestic investments. Since securities may be denominated in foreign currencies, may require settlement in foreign currencies or may pay interest or dividends in foreign currencies, changes in the relationship of these foreign currencies to the U.S. dollar can significantly affect the value of the investments and earnings of the Fund. Foreign investments may also subject the Fund to foreign government exchange restrictions, expropriation, taxation or other political, social or economic developments, all of which affect the market and/or credit risk of the investments.

(g) Counterparty risk and credit-risk-related contingent features of derivative instruments. The Fund may invest in certain securities or engage in other transactions where the Fund is exposed to counterparty credit risk in addition to broader market risks. The Fund may invest in securities of issuers, which may also be considered counterparties as trading partners in other transactions. This may increase the risk of loss in the event of default or bankruptcy by the counterparty or if the counterparty otherwise fails to meet its contractual obligations. The Fund’s subadviser attempts to mitigate counterparty risk by (i) periodically assessing the creditworthiness of its trading partners, (ii) monitoring and/or limiting the amount of its net exposure to each individual counterparty based on its assessment and (iii) requiring collateral from the counterparty for certain transactions. Market events and changes in overall economic conditions may impact the assessment of such counterparty risk by the subadviser. In addition, declines in the values of underlying collateral received may expose the Fund to increased risk of loss.

With exchange traded and centrally cleared derivatives, there is less counterparty risk to the Fund since the exchange or clearinghouse, as counterparty to such instruments, guarantees against a possible default. The clearinghouse stands between the buyer and the seller of the contract; therefore, the credit risk is limited to failure of the clearinghouse. While offset rights may exist under applicable law, the Fund does not have a contractual right of offset against a clearing broker or clearinghouse in the event of a default of the clearing broker or clearinghouse.

The Fund has entered into master agreements, such as an International Swaps and Derivatives Association, Inc. Master Agreement (“ISDA Master Agreement”) or similar agreement, with certain of its derivative counterparties that govern over-the-counter (“OTC”) derivatives and provide for general obligations, representations, agreements, collateral posting terms, netting provisions in the event of default or termination and credit related contingent features. The credit related contingent features include, but are not limited to, a percentage decrease in the Fund’s net assets or net asset value per share over

Western Asset SMASh Series C Fund 2026 Semi-Annual Report

a specified period of time. If these credit related contingent features were triggered, the derivatives counterparty could terminate the positions and demand payment or require additional collateral.

Under an ISDA Master Agreement, the Fund may, under certain circumstances, offset with the counterparty certain derivative financial instruments’ payables and/or receivables with collateral held and/or posted and create one single net payment. However, absent an event of default by the counterparty or a termination of the agreement, the terms of the ISDA Master Agreements do not result in an offset of reported amounts of financial assets and financial liabilities in the Statement of Assets and Liabilities across transactions between the Fund and the applicable counterparty. The enforceability of the right to offset may vary by jurisdiction.

Collateral requirements differ by type of derivative. Collateral or margin requirements are set by the broker or exchange clearinghouse for exchange traded derivatives while collateral terms are contract specific for OTC traded derivatives. Cash collateral that has been pledged to cover obligations of the Fund under derivative contracts, if any, will be reported separately in the Statement of Assets and Liabilities. Securities pledged as collateral, if any, for the same purpose are noted in the Schedule of Investments.

As of August 31, 2026, the Fund did not have any open OTC derivative transactions with credit related contingent features in a net liability position.

(h) Security transactions and investment income. Security transactions are accounted for on a trade date basis. Interest income (including interest income from payment-in-kind securities) is recorded on the accrual basis. Amortization of premiums and accretion of discounts on debt securities are recorded to interest income over the lives of the respective securities, except for premiums on certain callable debt securities, which are amortized to the earliest call date. Paydown gains and losses on mortgage- and asset-backed securities are recorded as adjustments to interest income. Dividend income is recorded on the ex-dividend date for dividends received in cash and/or securities. The cost of investments sold is determined by use of the specific identification method. To the extent any issuer defaults or a credit event occurs that impacts the issuer, the Fund may halt any additional interest income accruals and consider the realizability of interest accrued up to the date of default or credit event.

(i) Distributions to shareholders. Distributions from net investment income of the Fund, if any, are declared and paid on a monthly basis. Distributions of net realized gains, if any, are declared at least annually. Distributions to shareholders of the Fund are recorded on the ex-dividend date and are determined in accordance with income tax regulations, which may differ from GAAP.

(j) Federal and other taxes. It is the Fund’s policy to comply with the federal income and excise tax requirements of the Internal Revenue Code of 1986, as amended (the “Code”), applicable to regulated investment companies. Accordingly, the Fund intends to distribute its taxable income and net realized gains, if any, to shareholders in accordance with timing

Western Asset SMASh Series C Fund 2026 Semi-Annual Report

Notes to Financial Statements (unaudited) (cont’d)

requirements imposed by the Code. Therefore, no federal or state income tax provision is required in the Fund’s financial statements.

Management has analyzed the Fund’s tax positions taken on income tax returns for all open tax years and has concluded that as of February 28, 2026, no provision for income tax is required in the Fund’s financial statements. The Fund’s federal and state income and federal excise tax returns for the prior three fiscal years are subject to examination by the Internal Revenue Service and state departments of revenue.

In some cases, the Fund may be entitled to reclaim all or a portion of such taxes, and such reclaim amounts, if any, are reflected as a dividend receivable in the Statement of Assets and Liabilities and dividend income in the Statement of Operations. In many cases, however, the Fund may not receive such amounts for an extended period of time, depending on the country of investment.

(k) Reclassification. GAAP requires that certain components of net assets be reclassified to reflect permanent differences between financial and tax reporting. These reclassifications have no effect on net assets or net asset value per share.

2. Investment management agreement and other transactions with affiliates

FTFA is the Fund’s investment manager. Western Asset Management Company, LLC (“Western Asset”) and Western Asset Management Company Limited (“Western Asset London”) are the Fund’s subadvisers. FTFA, Western Asset and Western Asset London are indirect, wholly-owned subsidiaries of Franklin Templeton, Inc. (“Franklin Templeton”) (prior to August 17, 2026, known as Franklin Resources, Inc.).

FTFA and the subadvisers do not charge investment management fees to the Fund. However, the Fund is an integral part of the separately managed account program, and FTFA and the subadvisers will be compensated directly or indirectly by separately managed account program sponsors. FTFA provides administrative and certain oversight services to the Fund. FTFA delegates to the subadvisers the day-to-day portfolio management of the Fund.

FTFA has entered into an expense reimbursement arrangement with the Fund, pursuant to which FTFA has agreed to reimburse 100% of the Fund’s ordinary operating expenses. The expense reimbursement arrangement does not cover interest, brokerage, taxes and extraordinary expenses. This expense reimbursement arrangement cannot be terminated prior to December 31, 2027 without the Board’s consent.

During the six months ended August 31, 2026, fees waived and/or expenses reimbursed amounted to $112,169.

Franklin Distributors, LLC (“Franklin Distributors”) serves as the Fund’s sole and exclusive distributor. Franklin Distributors is an indirect, wholly-owned broker-dealer subsidiary of Franklin Templeton. Franklin Templeton Investor Services, LLC (“Investor Services”) serves as the Fund’s shareholder servicing agent and acts as the Fund’s transfer agent and dividend-paying agent. Investor Services is an indirect, wholly-owned subsidiary of Franklin Templeton. The Fund pays transfer agent fees to Investor Services for its performance of

Western Asset SMASh Series C Fund 2026 Semi-Annual Report

shareholder servicing obligations. Investor Services charges account-based fees based on the number of individual shareholder accounts, as well as a fixed percentage fee based on the total account-based fees charged. In addition, the Fund reimburses Investor Services for out of pocket expenses incurred. For the six months ended August 31, 2026, the Fund incurred transfer agent fees as reported on the Statement of Operations, of which $1,120 was earned by Investor Services.

All officers and one Trustee of the Trust are employees of Franklin Templeton or its affiliates and do not receive compensation from the Trust.

3. Investments

During the six months ended August 31, 2026, the aggregate cost of purchases and proceeds from sales of investments (excluding short-term investments) and U.S. Government & Agency Obligations were as follows:

Investments

U.S. Government &

Agency Obligations

Purchases

$5,447,500

$5,474,267

Sales

52,530,036

1,688,566

At August 31, 2026, the aggregate cost of investments and the aggregate gross unrealized appreciation and depreciation of investments for federal income tax purposes were substantially as follows:

Cost/Premiums

Paid (Received)

Gross

Unrealized

Appreciation

Gross

Unrealized

Depreciation

Net

Unrealized

Depreciation

Investments

$293,443,852

$6,282,377

$(29,433,915)

$(23,151,538)

4. Derivative instruments and hedging activities

Below is a table, grouped by derivative type, that provides information about the fair value and the location of derivatives within the Statement of Assets and Liabilities at August 31, 2026.

ASSET DERIVATIVES1
	Interest Rate Risk	Credit Risk	Total
Futures contracts2	$587,361	—	$587,361
Centrally cleared swap contracts3	—	$1,502,163	1,502,163
Total	$587,361	$1,502,163	$2,089,524

LIABILITY DERIVATIVES1

Interest

Rate Risk

Futures contracts2

$581,397

Western Asset SMASh Series C Fund 2026 Semi-Annual Report

Notes to Financial Statements (unaudited) (cont’d)

Generally, the balance sheet location for asset derivatives is receivables/net unrealized appreciation and for

liability derivatives is payables/net unrealized depreciation.

Includes cumulative unrealized appreciation (depreciation) of futures contracts as reported in the Schedule of

Investments. Only net variation margin is reported within the receivables and/or payables on the Statement of

Assets and Liabilities.

Includes cumulative unrealized appreciation (depreciation) of centrally cleared swap contracts as reported in the

Schedule of Investments. Only net variation margin is reported within the receivables and/or payables on the

Statement of Assets and Liabilities.

The following tables provide information about the effect of derivatives and hedging activities on the Fund’s Statement of Operations for the six months ended August 31, 2026. The first table provides additional detail about the amounts and sources of gains (losses) realized on derivatives during the period. The second table provides additional information about the change in net unrealized appreciation (depreciation) resulting from the Fund’s derivatives and hedging activities during the period.

AMOUNT OF NET REALIZED GAIN (LOSS) ON DERIVATIVES RECOGNIZED
	Interest Rate Risk	Credit Risk	Total
Futures contracts	$(2,076,464 )	—	$(2,076,464 )
Swap contracts	—	$1,440,131	1,440,131
Total	$(2,076,464 )	$1,440,131	$(636,333 )

CHANGE IN NET UNREALIZED APPRECIATION (DEPRECIATION) ON DERIVATIVES RECOGNIZED
	Interest Rate Risk	Credit Risk	Total
Futures contracts	$213,489	—	$213,489
Swap contracts	—	$2,527,118	2,527,118
Total	$213,489	$2,527,118	$2,740,607

During the six months ended August 31, 2026, the volume of derivative activity for the Fund was as follows:

	Average Market Value*
Futures contracts (to buy)	$139,475,451
Futures contracts (to sell)	73,440,746
	Average Notional Balance**
Credit default swap contracts (sell protection)	$452,439,000

*	Based on the average of the market values at each month-end during the period.
**	Based on the average of the notional amounts at each month-end during the period.

5. Shares of beneficial interest

At August 31, 2026, the Trust had an unlimited number of shares of beneficial interest authorized with a par value of $0.00001 per share. Each share represents an identical interest and has the same rights.

Western Asset SMASh Series C Fund 2026 Semi-Annual Report

Transactions in shares of the Fund were as follows:

	Six Months Ended August 31, 2026	Year Ended February 28, 2026
Shares sold	2,533,450	4,642,286
Shares repurchased	(7,417,462 )	(16,860,961 )
Net decrease	(4,884,012 )	(12,218,675 )

6. Redemption facility

The Fund, together with other U.S. registered and foreign investment funds (collectively, the “Borrowers”) managed by Franklin Templeton or its affiliates, is a borrower in a joint syndicated senior unsecured credit facility totaling $2.995 billion (the “Global Credit Facility”). The Global Credit Facility provides a source of funds to the Borrowers for temporary and emergency purposes, including the ability to meet future unanticipated or unusually large redemption requests. Unless renewed, the Global Credit Facility will terminate on January 29, 2027.

Under the terms of the Global Credit Facility, the Fund shall, in addition to interest charged on any borrowings made by the Fund and other costs incurred by the Fund, pay its share of fees and expenses incurred in connection with the implementation and maintenance of the Global Credit Facility, based upon its relative share of the aggregate net assets of all the Borrowers, including an annual commitment fee of 0.15% based upon the unused portion of the Global Credit Facility. These fees are reflected in the Statement of Operations. The Fund did not utilize the Global Credit Facility during the six months ended August 31, 2026.

7. Deferred capital losses

As of February 28, 2026, the Fund had deferred capital losses of $47,714,146, which have no expiration date, that will be available to offset future taxable capital gains.

8. Operating segments

The Fund operates as a single operating segment, which is an investment portfolio. A management group assigned to the Fund within the Fund’s investment manager serves as the Chief Operating Decision Maker (“CODM”) and is responsible for evaluating the Fund’s operating results and allocating resources in accordance with the Fund’s investment strategy. Internal reporting provided to the CODM aligns with the accounting policies and measurement principles used in the financial statements.

For information regarding segment assets, segment profit or loss, and significant expenses, refer to the Statement of Assets and Liabilities and the Statement of Operations, along with the related Notes to Financial Statements. The Fund’s Schedule of Investments provides details of the Fund’s investments that generate returns such as interest, dividends, and realized and unrealized gains or losses. Performance metrics, including portfolio turnover and expense ratios, are disclosed in the Financial Highlights.

Western Asset SMASh Series C Fund 2026 Semi-Annual Report

Changes in and Disagreements with Accountants	For the period covered by this report
Not applicable.
Results of Meeting(s) of Shareholders	For the period covered by this report
Not applicable.
Remuneration Paid to Directors, Officers and Others	For the period covered by this report
Refer to the financial statements included herein.

Western Asset SMASh Series C Fund

Board Approval of Management and

Subadvisory Agreements (unaudited)

The Executive and Contracts Committee of the Board of Trustees (the “Executive and Contracts Committee”) considered the Management Agreement between the Trust and Franklin Templeton Fund Adviser, LLC (“FTFA”) with respect to the Fund and the following subadvisory agreements with respect to the Fund (collectively, the “Agreements”) (i) a subadvisory agreement between FTFA and Western Asset Management Company, LLC (“Western Asset”) with respect to the Fund, and (ii) a subadvisory agreement between FTFA and Western Asset Management Company Limited (“WAML” or the “Non-U.S. Subadviser,” and together with Western Asset, the “Subadvisers,” and together with FTFA, the “Advisers”) with respect to the Fund at a meeting held on April 22, 2026. At an in-person meeting held on May 19, 2026, the Executive and Contracts Committee reported to the full Board of Trustees their considerations and recommendation with respect to the Agreements, and the Board of Trustees, including a majority of the Independent Trustees, considered and approved renewal of the Agreements.

The Trustees noted that although Western Asset’s business is operated through separate legal entities, such as the Non-U.S. Subadviser, senior investment personnel at Western Asset have supervisory oversight responsibility over the investment decisions made by the Non-U.S. Subadviser. Therefore, in connection with their deliberations noted below, the Trustees primarily focused on the information provided by Western Asset when considering the approval of the Agreement between FTFA and the Non-U.S. Subadviser.

In arriving at their decision to approve the renewal of the Agreements, the Trustees met with representatives of the Advisers, including relevant investment advisory personnel; considered a variety of information prepared by the Advisers, materials provided by Broadridge and advice and materials provided by counsel to the Independent Trustees; reviewed performance and expense information for peer groups of comparable funds selected by Broadridge (the “Performance Universe”) and certain other comparable products available from Western Asset or affiliates of Western Asset, including separate accounts managed by Western Asset; and requested and reviewed additional information as necessary. These reviews were in addition to information obtained by the Trustees at their regular quarterly meetings (and various committee meetings) with respect to the Fund’s performance and other relevant matters and related discussions with the Advisers’ personnel. The information received and considered by the Board both in conjunction with the May meeting and at prior meetings was both written and oral. With respect to the Broadridge materials, the Board was provided with a description of the methodology used to determine the similarity of the Fund with the funds included in the Performance Universe. It was noted that while the Board found the Broadridge data generally useful they recognized its limitations, including that the data may vary depending on the end date selected and that the results of the performance comparisons may vary depending on the selection of the peer group and its composition over time. In considering the Fund’s performance, the Board took into account that the Fund is offered only to participants in separately managed account programs who pay costs and expenses, including fees for advice and portfolio execution, at the level of such programs rather than at the Fund level.

Western Asset SMASh Series C Fund

Board Approval of Management and

Subadvisory Agreements (unaudited) (cont’d)

As part of their review, the Trustees examined FTFA’s ability to provide high quality oversight and administrative and shareholder support services to the Fund and the Subadvisers’ ability to provide high quality investment management services to the Fund. The Trustees considered the experience of FTFA’s personnel in providing the types of services that FTFA is responsible for providing to the Fund; the ability of FTFA to attract and retain capable personnel; and the capability and integrity of FTFA’s senior management and staff. The Trustees also considered the investment philosophy and research and decision-making processes of the Subadvisers; the experience of their key advisory personnel responsible for management of the Fund; the ability of the Subadvisers to attract and retain capable research and advisory personnel; the risks to the Advisers associated with sponsoring the Fund (such as entrepreneurial, operational, reputational, litigation and regulatory risk), as well as FTFA’s and each Subadviser’s risk management processes; the capability and integrity of the Advisers’ senior management and staff; and the level of skill required to manage the Fund. In addition, the Trustees reviewed the quality of the Advisers’ services with respect to regulatory compliance and compliance with the investment policies of the Fund, and conditions that might affect the Advisers’ ability to provide high quality services to the Fund in the future, including their business reputations, financial conditions and operational stabilities. Based on the foregoing, the Trustees concluded that the Subadvisers’ investment process, research capabilities and philosophy were well suited to the Fund given its investment objectives and policies, and that the Advisers would be able to meet any reasonably foreseeable obligations under the Agreements.

The Board reviewed the qualifications, backgrounds and responsibilities of FTFA’s and Western Asset’s senior personnel and the team of investment professionals primarily responsible for the day-to-day portfolio management of the Fund. The Board also considered, based on its knowledge of FTFA and its affiliates, the financial resources of Franklin Templeton, Inc. (prior to August 17, 2026, known as Franklin Resources, Inc.), the parent organization of the Advisers. The Board recognized the importance of having a fund manager with significant resources.

In reviewing the quality of the services provided to the Fund, the Trustees also reviewed comparisons of the performance of the Fund to the performance of certain comparable funds and to its investment benchmark over the 1-, 3-, 5- and 10-year periods ended December 31, 2025. The information comparing the Fund’s performance to that of its Performance Universe, consisting of all funds (including the Fund) classified as retail and institutional general bond funds by Broadridge, showed, among other data, that the Fund’s performance for the 1-, 3-, 5- and 10-year periods ended December 31, 2025 was above the median. The Board noted that the Fund’s performance exceeded the performance of its benchmark index for the 1-, 3-, 5- and 10-year periods ended December 31, 2025. The Board considered the factors involved in the Fund’s performance relative to the performance of its investment benchmark and Performance Universe.

Western Asset SMASh Series C Fund

The Board noted that the Fund does not pay a management fee. The Board also noted that the Fund is an integral part of the separately managed account program, and the Advisers are compensated directly or indirectly by separately managed account program sponsors. The Board recognized that FTFA had agreed to pay all operating expenses of the Fund, except interest, brokerage, taxes, and extraordinary expenses. The Board considered that this arrangement is expected to continue through December 2027.

The Trustees further evaluated the benefits of the advisory relationship to the Advisers, including, among others, the profitability of the relationship to the Advisers; the direct and indirect benefits that the Advisers may receive from their relationships with the Fund, including the “fallout benefits,” such as reputational value derived from serving as investment adviser to the Fund; and the affiliation between the Advisers and certain other service providers for the Fund. In that connection, the Board considered that the ancillary benefits that the Advisers receive were reasonable. The Trustees noted that Western Asset does not have soft dollar arrangements.

Finally, the Trustees considered, in light of the profitability information provided by the Advisers, the extent to which economies of scale would be realized by the Advisers as the assets of the Fund grow. The Board discussed whether FTFA realizes economies of scale as the Fund’s assets grow. Among other things, the Board considered that the Fund pays no management fees to FTFA. The Board also noted that FTFA has agreed to pay all operating expenses of the Fund, except interest, brokerage, taxes, and extraordinary expenses.

In their deliberations with respect to these matters, the Independent Trustees were advised by their independent counsel, who is independent, within the meaning of the Securities and Exchange Commission rules regarding the independence of counsel, of the Advisers. The Independent Trustees weighed the foregoing matters in light of the advice given to them by their independent counsel as to the law applicable to the review of investment advisory contracts. In arriving at a decision, the Trustees, including the Independent Trustees, did not identify any single matter as all-important or controlling, and each Trustee may have attributed different weight to the various factors in evaluating the Agreements. The foregoing summary does not detail all the matters considered. The Trustees judged the terms and conditions of the Agreements in light of all of the surrounding circumstances.

Based upon their review, the Trustees, including all of the Independent Trustees, determined, in the exercise of their business judgment, that they were satisfied with the quality of investment advisory services being provided by the Advisers and that approval of the Agreements was in the best interest of the Fund and its shareholders.

Western Asset SMASh Series C Fund

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Western Asset

SMASh Series C Fund

Trustees

Robert Abeles, Jr.

Jane F. Dasher

Anita L. DeFrantz

Susan B. Kerley

Michael Larson

Avedick B. Poladian

William E.B. Siart
Chair

Jaynie M. Studenmund

Peter J. Taylor

Jane Trust

Investment manager

Franklin Templeton Fund Adviser, LLC

Subadvisers

Western Asset Management Company, LLC

Western Asset Management Company Limited

Distributor

Franklin Distributors, LLC

Custodian

The Bank of New York Mellon

Transfer agent

Franklin Templeton Investor
Services, LLC
3344 Quality Drive
Rancho Cordova, CA 95670-7313

Independent registered
public accounting firm

PricewaterhouseCoopers LLP
Baltimore, MD

Western Asset SMASh Series C Fund

The Fund is a separate investment series of Legg Mason Partners Institutional Trust, a Maryland statutory trust.

Western Asset SMASh Series C Fund
Legg Mason Funds
One Madison Avenue, 17th Floor
New York, NY 10010

The Fund files its complete schedule of portfolio holdings with the Securities and Exchange Commission (“SEC”) for the first and third quarters of each fiscal year as an exhibit to its reports on Form N-PORT. The Fund’s Forms N-PORT are available on the SEC’s website at www.sec.gov. To obtain information on Form N-PORT, shareholders can call the Fund at 877-6LM-FUND/656-3863.

Information on how the Fund voted proxies relating to portfolio securities during the prior 12-month period ended June 30th of each year and a description of the policies and procedures that the Fund uses to determine how to vote proxies related to portfolio transactions are available (1) without charge, upon request, by calling the Fund at 877-6LM-FUND/656-3863, (2) at www.franklintempleton.com and (3) on the SEC’s website at www.sec.gov.

This report is submitted for the general information of the shareholders of Western Asset SMASh Series C Fund and is not intended for distribution to prospective investors.

This report must be preceded or accompanied by a free prospectus. Investors should consider the Fund’s investment objectives, risks, charges and expenses carefully before investing. The prospectus contains this and other important information about the Fund. Please read the prospectus carefully before investing.

www.franklintempleton.com

90521-SFSOI 10/26

ITEM 8.

CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

The information is disclosed as part of the Financial Statements included in Item 7 of this Form N-CSR.

ITEM 9.

PROXY DISCLOSURES FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

The information is disclosed as part of the Financial Statements included in Item 7 of this Form N-CSR.

ITEM 10.

REMUNERATION PAID TO DIRECTORS, OFFICERS, AND OTHERS OF OPEN-END MANAGEMENT INVESTMENT COMPANIES.

The information is disclosed as part of the Financial Statements included in Item 7 of this Form N-CSR.

ITEM 11.

STATEMENT REGARDING BASIS FOR APPROVAL OF INVESTMENT ADVISORY CONTRACT.

The information is disclosed as part of the Financial Statements included in Item 7 of this Form N-CSR, as applicable.

ITEM 12.

DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES.

Not applicable.

ITEM 13.

PORTFOLIO MANAGERS OF CLOSED-END MANAGEMENT INVESTMENT COMPANIES.

Not applicable.

ITEM 14.

PURCHASES OF EQUITY SECURITIES BY CLOSED-END MANAGEMENT INVESTMENT COMPANY AND AFFILIATED PURCHASERS.

Not applicable.

ITEM 15.

SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS.

There have been no changes to the procedures by which shareholders may recommend nominees to the Registrant’s Board of Trustees that would require disclosure herein.

ITEM 16.

CONTROLS AND PROCEDURES.

(a)

The Registrants acknowledge the Staff’s comment. In future filings on Form N-CSR, the certifications required by Rule 30a-2 and Item 19(a)(3) will include the designations “principal executive officer” and “principal financial officer” in the signature blocks, reflecting the capacity in which each signatory executes the certification, in conformity with the language of the Rule and Form N-CSR. The Registrants may also include each signatory’s actual title with respect to the Funds alongside the required designation.

(b)

There were no changes in the Registrant’s internal control over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act) that occurred during the period covered by this report that have materially affected, or are likely to materially affect the Registrant’s internal control over financial reporting.

ITEM 17.

DISCLOSURE OF SECURITIES LENDING ACTIVITIES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES.

Not applicable.

ITEM 18.

RECOVERY OF ERRONEOUSLY AWARDED COMPENSATION.

(a)

Not applicable.

(b)

Not applicable.

ITEM 19.

EXHIBITS.

(a) (1) Not applicable.

Exhibit 99.CODE ETH

(a) (3) Certifications pursuant to section 302 of the Sarbanes-Oxley Act of 2002 attached hereto.

Exhibit 99.CERT

(b) Certifications pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 attached hereto.

Exhibit 99.906CERT

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this Report to be signed on its behalf by the undersigned, there unto duly authorized.

Legg Mason Partners Institutional Trust

By:	/s/ Jane Trust
	Jane Trust
	Chief Executive Officer

Date:	October 28, 2026

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

By:	/s/ Jane Trust
	Jane Trust
	Chief Executive Officer

Date:	October 28, 2026

By:	/s/ Christopher Berarducci
	Christopher Berarducci
	Principal Financial Officer

Date:	October 28, 2026