N-MFP3 0000889512 XXXXXXXX 2026-09-30 Legg Mason Partners Institutional Trust 0000889512 54930003LJE4ZPPMRV82 Western Asset Premier Institutional U.S. Treasury Reserves 549300FS1J68EF5THY28 S000066841 2 N N 033-49552 Franklin Templeton Fund Adviser LLC 801-66785 Western Asset Management Company 801-08162 PricewaterhouseCoopers LLP Baltimore MD BNY Mellon Investment Servicing (US) Inc. 0000849542 084-01761 Y 0001140869 U.S. Treasury Reserves Portfolio S000018042 N N Government N N 6 6 20012394301.27 20012394301.27 0.2500 0.5000 2026-09-01 20178956560.85 20178956560.85 0.2500 0.5000 2026-09-02 20780733235.66 20780733235.66 0.2500 0.5000 2026-09-03 21041238100.06 21041238100.06 0.2500 0.5000 2026-09-04 21152467318.90 21152467318.90 0.2500 0.5000 2026-09-08 20966813337.92 20966813337.92 0.2500 0.5000 2026-09-09 20268573450.58 20268573450.58 0.2500 0.5000 2026-09-10 20172916457.91 20172916457.91 0.2500 0.5000 2026-09-11 20183442267.74 20183442267.74 0.2500 0.5000 2026-09-14 20563100944.88 20563100944.88 0.2500 0.5000 2026-09-15 20338243509.70 20338243509.70 0.2500 0.5000 2026-09-16 20544971086.73 20544971086.73 0.2500 0.5000 2026-09-17 20690546652.32 20690546652.32 0.2500 0.5000 2026-09-18 20597812198.97 20597812198.97 0.2500 0.5000 2026-09-21 19064623445.00 19064623445.00 0.2500 0.5000 2026-09-22 18853833656.30 18853833656.30 0.2500 0.5000 2026-09-23 18412547686.02 18412547686.02 0.2500 0.5000 2026-09-24 17899767212.35 17899767212.35 0.2500 0.5000 2026-09-25 18067756422.44 18067756422.44 0.2500 0.5000 2026-09-28 17455213512.59 17455213512.59 0.2500 0.5000 2026-09-29 17429310514.81 17429310514.81 0.2500 0.5000 2026-09-30 0.00 1497586211.48 0.00 7725.65 6840453.29 1490753483.84 1490803993.9900 Y 1.0000 0.0379 2026-09-01 0.0379 2026-09-02 0.0379 2026-09-03 0.0379 2026-09-04 0.0379 2026-09-08 0.0379 2026-09-09 0.0379 2026-09-10 0.0380 2026-09-11 0.0380 2026-09-14 0.0381 2026-09-15 0.0382 2026-09-16 0.0383 2026-09-17 0.0385 2026-09-18 0.0386 2026-09-21 0.0386 2026-09-22 0.0387 2026-09-23 0.0387 2026-09-24 0.0388 2026-09-25 0.0388 2026-09-28 0.0389 2026-09-29 0.0390 2026-09-30 1.0000 2026-09-01 1.0000 2026-09-02 1.0000 2026-09-03 1.0000 2026-09-04 1.0000 2026-09-08 1.0000 2026-09-09 1.0000 2026-09-10 1.0000 2026-09-11 1.0000 2026-09-14 1.0000 2026-09-15 1.0000 2026-09-16 1.0000 2026-09-17 1.0000 2026-09-18 1.0000 2026-09-21 1.0000 2026-09-22 1.0000 2026-09-23 1.0000 2026-09-24 1.0000 2026-09-25 1.0000 2026-09-28 1.0000 2026-09-29 1.0000 2026-09-30 N N PC C000215196 1.00 1472895761.69 1472945715.5000 1.0000 2026-09-01 1.0000 2026-09-02 1.0000 2026-09-03 1.0000 2026-09-04 1.0000 2026-09-08 1.0000 2026-09-09 1.0000 2026-09-10 1.0000 2026-09-11 1.0000 2026-09-14 1.0000 2026-09-15 1.0000 2026-09-16 1.0000 2026-09-17 1.0000 2026-09-18 1.0000 2026-09-21 1.0000 2026-09-22 1.0000 2026-09-23 1.0000 2026-09-24 1.0000 2026-09-25 1.0000 2026-09-28 1.0000 2026-09-29 1.0000 2026-09-30 3094022.19 553265.25 2026-09-01 728000.00 38588691.07 2026-09-02 214383346.67 2156000.00 2026-09-03 21699000.00 4251093.63 2026-09-04 0.00 102217597.89 2026-09-08 9591491.22 7000.00 2026-09-09 68444751.86 335211.13 2026-09-10 85000000.00 40444026.90 2026-09-11 0.00 70992740.73 2026-09-14 111977380.34 0.00 2026-09-15 53478298.69 0.00 2026-09-16 37374000.00 41563722.91 2026-09-17 14860775.64 5353000.00 2026-09-18 0.00 159080787.94 2026-09-21 201000.00 247667991.55 2026-09-22 0.00 228788353.20 2026-09-23 310000.00 225349331.12 2026-09-24 37744945.48 483257000.00 2026-09-25 1057955.88 53579000.00 2026-09-28 34762377.57 149025000.00 2026-09-29 25519456.56 41582000.00 2026-09-30 720226802.10 1894791813.32 0.0365 2026-09-01 0.0365 2026-09-02 0.0365 2026-09-03 0.0365 2026-09-04 0.0365 2026-09-08 0.0365 2026-09-09 0.0365 2026-09-10 0.0366 2026-09-11 0.0366 2026-09-14 0.0367 2026-09-15 0.0368 2026-09-16 0.0369 2026-09-17 0.0371 2026-09-18 0.0372 2026-09-21 0.0372 2026-09-22 0.0373 2026-09-23 0.0373 2026-09-24 0.0374 2026-09-25 0.0374 2026-09-28 0.0375 2026-09-29 0.0376 2026-09-30 Y 431595.10 Non-financial corporation 0.6655 0.00 Retail investor 0.1908 0.00 N CC C000215197 200000000.00 17857722.15 17858278.4900 1.0000 2026-09-01 1.0000 2026-09-02 1.0000 2026-09-03 1.0000 2026-09-04 1.0000 2026-09-08 1.0000 2026-09-09 1.0000 2026-09-10 1.0000 2026-09-11 1.0000 2026-09-14 1.0000 2026-09-15 1.0000 2026-09-16 1.0000 2026-09-17 1.0000 2026-09-18 1.0000 2026-09-21 1.0000 2026-09-22 1.0000 2026-09-23 1.0000 2026-09-24 1.0000 2026-09-25 1.0000 2026-09-28 1.0000 2026-09-29 1.0000 2026-09-30 126989.87 0.00 2026-09-01 0.00 0.00 2026-09-02 0.00 0.00 2026-09-03 0.00 0.00 2026-09-04 8500000.00 0.00 2026-09-08 0.00 0.00 2026-09-09 0.00 0.00 2026-09-10 4920000.00 0.00 2026-09-11 0.00 0.00 2026-09-14 0.00 0.00 2026-09-15 0.00 0.00 2026-09-16 2000000.00 0.00 2026-09-17 0.00 4000000.00 2026-09-18 0.00 0.00 2026-09-21 0.00 0.00 2026-09-22 0.00 25000000.00 2026-09-23 0.00 0.00 2026-09-24 0.00 0.00 2026-09-25 0.00 0.00 2026-09-28 0.00 0.00 2026-09-29 0.00 0.00 2026-09-30 15546989.87 29000000.00 0.0367 2026-09-01 0.0367 2026-09-02 0.0367 2026-09-03 0.0367 2026-09-04 0.0367 2026-09-08 0.0367 2026-09-09 0.0367 2026-09-10 0.0368 2026-09-11 0.0368 2026-09-14 0.0369 2026-09-15 0.0370 2026-09-16 0.0371 2026-09-17 0.0373 2026-09-18 0.0374 2026-09-21 0.0374 2026-09-22 0.0375 2026-09-23 0.0375 2026-09-24 0.0376 2026-09-25 0.0376 2026-09-28 0.0377 2026-09-29 0.0378 2026-09-30 Y 8578.51 Non-financial corporation 0.1151 0.00 Non-financial corporation 0.1215 0.00 Non-financial corporation 0.1747 0.00 Non-financial corporation 0.5292 0.00 N U.S. Treasury Reserves Portfolio U.S. Treasury Reserves Portfolio NA N/A LMUSTREASURYRES Investment Company Y Fitch, Inc. NR Moody's Investors Service, Inc. NR Standard and Poor's Ratings Services NR 2026-10-01 2026-10-01 2026-10-01 N N N 0.0000 1497586211.48 1497586211.48 1.0000 N Y Y N Legg Mason Partners Institutional Trust 2026-10-07 /s/Christopher Berarducci Christopher Berarducci Principal Financial Officer