N-MFP3 0001140869 XXXXXXXX 2026-06-30 Master Portfolio Trust 0001140869 549300I1QJ6KR2C8FZ09 U.S. Treasury Obligations Portfolio 5493007V6M8T9W4V5N96 S000042914 1 N N Franklin Templeton Fund Adviser LLC 801-66785 Western Asset Management Company 801-08162 PricewaterhouseCoopers LLP Baltimore MD None N Y 0000889512 Western Asset Institutional U.S. Treasury Obligations Money Market Fund 033-49552 S000041891 N Government N Y 23 25 584725500.82 584725500.82 0.9994 0.9994 2026-06-01 619471365.61 619471365.61 0.9994 0.9994 2026-06-02 613353100.08 613353100.08 0.9994 0.9994 2026-06-03 591575218.17 591575218.17 0.9994 0.9994 2026-06-04 609416157.32 609416157.32 0.9993 0.9993 2026-06-05 625953794.59 625953794.59 0.9994 0.9994 2026-06-08 593414677.94 593414677.94 0.9993 0.9993 2026-06-09 600636601.68 600636601.68 0.9993 0.9993 2026-06-10 602957112.89 602957112.89 0.9993 0.9993 2026-06-11 589845859.90 589845859.90 0.9992 0.9992 2026-06-12 563968700.56 563968700.56 0.9992 0.9992 2026-06-15 587069663.80 587069663.80 0.9992 0.9992 2026-06-16 597051853.42 597051853.42 0.9992 0.9992 2026-06-17 567018604.55 567018604.55 0.9990 0.9990 2026-06-18 566081979.97 566081979.97 0.9991 0.9991 2026-06-22 534105524.74 534105524.74 0.9991 0.9991 2026-06-23 545716021.60 545716021.60 0.9991 0.9991 2026-06-24 550780561.12 550780561.12 0.9991 0.9991 2026-06-25 545575673.73 545575673.73 0.9990 0.9990 2026-06-26 547605276.51 547605276.51 0.9990 0.9990 2026-06-29 549401509.63 549401509.63 0.9993 0.9993 2026-06-30 19724218.68 529667673.72 529677290.95 366949.38 29864739.54 519903719.47 0.0000 N 0.0000 0.0000 2026-06-01 0.0000 2026-06-02 0.0000 2026-06-03 0.0000 2026-06-04 0.0000 2026-06-05 0.0000 2026-06-08 0.0000 2026-06-09 0.0000 2026-06-10 0.0000 2026-06-11 0.0000 2026-06-12 0.0000 2026-06-15 0.0000 2026-06-16 0.0000 2026-06-17 0.0000 2026-06-18 0.0000 2026-06-22 0.0000 2026-06-23 0.0000 2026-06-24 0.0000 2026-06-25 0.0000 2026-06-26 0.0000 2026-06-29 0.0000 2026-06-30 0.0000 2026-06-01 0.0000 2026-06-02 0.0000 2026-06-03 0.0000 2026-06-04 0.0000 2026-06-05 0.0000 2026-06-08 0.0000 2026-06-09 0.0000 2026-06-10 0.0000 2026-06-11 0.0000 2026-06-12 0.0000 2026-06-15 0.0000 2026-06-16 0.0000 2026-06-17 0.0000 2026-06-18 0.0000 2026-06-22 0.0000 2026-06-23 0.0000 2026-06-24 0.0000 2026-06-25 0.0000 2026-06-26 0.0000 2026-06-29 0.0000 2026-06-30 N N A C000133025 1.00 519903719.47 0.0000 0.0000 2026-06-01 0.0000 2026-06-02 0.0000 2026-06-03 0.0000 2026-06-04 0.0000 2026-06-05 0.0000 2026-06-08 0.0000 2026-06-09 0.0000 2026-06-10 0.0000 2026-06-11 0.0000 2026-06-12 0.0000 2026-06-15 0.0000 2026-06-16 0.0000 2026-06-17 0.0000 2026-06-18 0.0000 2026-06-22 0.0000 2026-06-23 0.0000 2026-06-24 0.0000 2026-06-25 0.0000 2026-06-26 0.0000 2026-06-29 0.0000 2026-06-30 0.00 0.00 2026-06-01 0.00 0.00 2026-06-02 0.00 0.00 2026-06-03 0.00 0.00 2026-06-04 0.00 0.00 2026-06-05 0.00 0.00 2026-06-08 0.00 0.00 2026-06-09 0.00 0.00 2026-06-10 0.00 0.00 2026-06-11 0.00 0.00 2026-06-12 0.00 0.00 2026-06-15 0.00 0.00 2026-06-16 0.00 0.00 2026-06-17 0.00 0.00 2026-06-18 0.00 0.00 2026-06-22 0.00 0.00 2026-06-23 0.00 0.00 2026-06-24 0.00 0.00 2026-06-25 0.00 0.00 2026-06-26 0.00 0.00 2026-06-29 0.00 0.00 2026-06-30 0.00 0.00 0.0000 2026-06-01 0.0000 2026-06-02 0.0000 2026-06-03 0.0000 2026-06-04 0.0000 2026-06-05 0.0000 2026-06-08 0.0000 2026-06-09 0.0000 2026-06-10 0.0000 2026-06-11 0.0000 2026-06-12 0.0000 2026-06-15 0.0000 2026-06-16 0.0000 2026-06-17 0.0000 2026-06-18 0.0000 2026-06-22 0.0000 2026-06-23 0.0000 2026-06-24 0.0000 2026-06-25 0.0000 2026-06-26 0.0000 2026-06-29 0.0000 2026-06-30 N 0.00 N UNITED STATES TREASURY BILL UNITED STATES TREASURY BILL 912797RF6 254900HROIFWPRGM1V77 US912797RF64 U.S. Treasury Debt Y Fitch, Inc. F1+u Moody's Investors Service, Inc. P-1 Standard and Poor's Ratings Services A-1+ 2026-07-09 2026-07-09 2026-07-09 N N N 0.0368 23311146.79 23311146.79 0.0448 N Y Y N UNITED STATES TREASURY BILL UNITED STATES TREASURY BILL 912797RG4 254900HROIFWPRGM1V77 US912797RG48 U.S. Treasury Debt Y Fitch, Inc. F1+u Moody's Investors Service, Inc. P-1 Standard and Poor's Ratings Services A-1+ 2026-08-06 2026-08-06 2026-08-06 N N N 0.0368 9963850.00 9963850.00 0.0192 N Y Y N UNITED STATES TREASURY BILL UNITED STATES TREASURY BILL 912797RS8 254900HROIFWPRGM1V77 US912797RS85 912797RS8 U.S. Treasury Debt Y Fitch, Inc. F1+u Moody's Investors Service, Inc. P-1 Standard and Poor's Ratings Services A-1+ 2026-09-03 2026-09-03 2026-09-03 N N N 0.0372 19870044.40 19870044.40 0.0382 N Y Y N UNITED STATES TREASURY BILL UNITED STATES TREASURY BILL 912797SA6 254900HROIFWPRGM1V77 US912797SA68 912797SA6 U.S. Treasury Debt Y Fitch, Inc. F1+u Moody's Investors Service, Inc. P-1 Standard and Poor's Ratings Services A-1+ 2026-10-01 2026-10-01 2026-10-01 N N N 0.0382 14856825.00 14856825.00 0.0286 N Y Y N UNITED STATES TREASURY BILL UNITED STATES TREASURY BILL 912797TF4 254900HROIFWPRGM1V77 US912797TF47 U.S. Treasury Debt Y Fitch, Inc. F1+u Moody's Investors Service, Inc. P-1 Standard and Poor's Ratings Services A-1+ 2026-07-02 2026-07-02 2026-07-02 N N N 0.0365 24997500.50 24997500.50 0.0481 N Y Y N UNITED STATES TREASURY BILL UNITED STATES TREASURY BILL 912797TN7 254900HROIFWPRGM1V77 US912797TN70 U.S. Treasury Debt Y Fitch, Inc. F1+u Moody's Investors Service, Inc. P-1 Standard and Poor's Ratings Services A-1+ 2026-07-16 2026-07-16 2026-07-16 N N N 0.0366 49925021.00 49925021.00 0.0960 N Y Y N UNITED STATES TREASURY BILL UNITED STATES TREASURY BILL 912797TQ0 254900HROIFWPRGM1V77 US912797TQ02 912797TQ0 U.S. Treasury Debt Y Fitch, Inc. F1+u Moody's Investors Service, Inc. P-1 Standard and Poor's Ratings Services A-1+ 2026-07-30 2026-07-30 2026-07-30 N N N 0.0365 12962352.39 12962352.39 0.0249 N Y Y N UNITED STATES TREASURY BILL UNITED STATES TREASURY BILL 912797TW7 254900HROIFWPRGM1V77 US912797TW79 U.S. Treasury Debt Y Fitch, Inc. F1+u Moody's Investors Service, Inc. P-1 Standard and Poor's Ratings Services A-1+ 2026-08-13 2026-08-13 2026-08-13 N N N 0.0371 24891035.00 24891035.00 0.0479 N Y Y N UNITED STATES TREASURY BILL UNITED STATES TREASURY BILL 912797TX5 254900HROIFWPRGM1V77 US912797TX52 U.S. Treasury Debt Y Fitch, Inc. F1+u Moody's Investors Service, Inc. P-1 Standard and Poor's Ratings Services A-1+ 2026-08-20 2026-08-20 2026-08-20 N N N 0.0372 9948944.40 9948944.40 0.0191 N Y Y N UNITED STATES TREASURY BILL UNITED STATES TREASURY BILL 912797UF2 254900HROIFWPRGM1V77 US912797UF28 U.S. Treasury Debt Y Fitch, Inc. F1+u Moody's Investors Service, Inc. P-1 Standard and Poor's Ratings Services A-1+ 2026-09-10 2026-09-10 2026-09-10 N N N 0.0367 14395763.13 14395763.13 0.0277 N Y Y N UNITED STATES TREASURY BILL UNITED STATES TREASURY BILL 912797UG0 254900HROIFWPRGM1V77 US912797UG01 U.S. Treasury Debt Y Fitch, Inc. F1+u Moody's Investors Service, Inc. P-1 Standard and Poor's Ratings Services A-1+ 2026-09-17 2026-09-17 2026-09-17 N N N 0.0373 14881524.45 14881524.45 0.0286 N Y Y N UNITED STATES TREASURY BILL UNITED STATES TREASURY BILL 912797UH8 254900HROIFWPRGM1V77 US912797UH83 U.S. Treasury Debt Y Fitch, Inc. F1+u Moody's Investors Service, Inc. P-1 Standard and Poor's Ratings Services A-1+ 2026-09-24 2026-09-24 2026-09-24 N N N 0.0373 9913668.30 9913668.30 0.0191 N Y Y N UNITED STATES TREASURY BILL UNITED STATES TREASURY BILL 912797UN5 254900HROIFWPRGM1V77 US912797UN51 U.S. Treasury Debt Y Fitch, Inc. F1+u Moody's Investors Service, Inc. P-1 Standard and Poor's Ratings Services A-1+ 2026-07-07 2026-07-07 2026-07-07 N N N 0.0364 9994055.00 9994055.00 0.0192 N Y Y N UNITED STATES TREASURY BILL UNITED STATES TREASURY BILL 912797UP0 254900HROIFWPRGM1V77 US912797UP00 U.S. Treasury Debt Y Fitch, Inc. F1+u Moody's Investors Service, Inc. P-1 Standard and Poor's Ratings Services A-1+ 2026-07-14 2026-07-14 2026-07-14 N N N 0.0364 9987083.10 9987083.10 0.0192 N Y Y N UNITED STATES TREASURY BILL UNITED STATES TREASURY BILL 912797UR6 254900HROIFWPRGM1V77 US912797UR65 U.S. Treasury Debt Y Fitch, Inc. F1+u Moody's Investors Service, Inc. P-1 Standard and Poor's Ratings Services A-1+ 2026-07-28 2026-07-28 2026-07-28 N N N 0.0368 9972896.90 9972896.90 0.0192 N Y Y N UNITED STATES TREASURY BILL UNITED STATES TREASURY BILL 912797US4 254900HROIFWPRGM1V77 US912797US49 U.S. Treasury Debt Y Fitch, Inc. F1+u Moody's Investors Service, Inc. P-1 Standard and Poor's Ratings Services A-1+ 2026-08-04 2026-08-04 2026-08-04 N N N 0.0367 9965911.50 9965911.50 0.0192 N Y Y N UNITED STATES TREASURY BILL UNITED STATES TREASURY BILL 912797UT2 254900HROIFWPRGM1V77 US912797UT22 U.S. Treasury Debt Y Fitch, Inc. F1+u Moody's Investors Service, Inc. P-1 Standard and Poor's Ratings Services A-1+ 2026-08-11 2026-08-11 2026-08-11 N N N 0.0369 9958584.30 9958584.30 0.0192 N Y Y N UNITED STATES TREASURY BILL UNITED STATES TREASURY BILL 912797UU9 254900HROIFWPRGM1V77 US912797UU94 U.S. Treasury Debt Y Fitch, Inc. F1+u Moody's Investors Service, Inc. P-1 Standard and Poor's Ratings Services A-1+ 2026-08-18 2026-08-18 2026-08-18 N N N 0.0370 24878058.25 24878058.25 0.0479 N Y Y N UNITED STATES TREASURY BILL UNITED STATES TREASURY BILL 912797UV7 254900HROIFWPRGM1V77 US912797UV77 U.S. Treasury Debt Y Fitch, Inc. F1+u Moody's Investors Service, Inc. P-1 Standard and Poor's Ratings Services A-1+ 2026-08-25 2026-08-25 2026-08-25 N N N 0.0373 9944159.70 9944159.70 0.0191 N Y Y N UNITED STATES TREASURY FLOATING RATE NOTE UNITED STATES TREASURY FLOATING RATE NOTE 3.958000% 91282CLA7 254900HROIFWPRGM1V77 US91282CLA70 U.S. Treasury Debt Y Fitch, Inc. F1+ Moody's Investors Service, Inc. P-1 Standard and Poor's Ratings Services A-1+ 2026-07-01 2026-07-31 2026-07-31 N N N 0.0377 50049249.61 50049249.61 0.0963 N Y Y N CREDIT AGRICOLE CORPORATE & INVESTMENT BANK CREDIT AGRICOLE CORPORATE & INVESTMENT BANK 3.640000% N/A 1VUV7VQFKUOQSJ21A208 0001330437 LMRP10641657 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N N N US TREASURY N/B 254900HROIFWPRGM1V77 912810UG1 2055-02-15 4.625000 0.00 1000.00 978.15 U.S. Treasuries (including strips) US TREASURY N/B 254900HROIFWPRGM1V77 91282CAV3 2030-11-15 0.875000 0.00 100.00 87.15 U.S. Treasuries (including strips) US TREASURY N/B 254900HROIFWPRGM1V77 91282CGS4 2030-03-31 3.625000 0.00 2611600.00 2589218.53 U.S. Treasuries (including strips) US TREASURY N/B 254900HROIFWPRGM1V77 91282CHY0 2026-09-15 4.625000 0.00 4999300.00 5074942.86 U.S. Treasuries (including strips) US TREASURY N/B 254900HROIFWPRGM1V77 91282CJQ5 2030-12-31 3.750000 0.00 182200.00 179246.54 U.S. Treasuries (including strips) US TREASURY N/B 254900HROIFWPRGM1V77 91282CKE0 2027-03-15 4.250000 0.00 300.00 304.19 U.S. Treasuries (including strips) US TREASURY N/B 254900HROIFWPRGM1V77 91282CLX7 2027-11-15 4.125000 0.00 11769000.00 11829683.91 U.S. Treasuries (including strips) US TREASURY N/B 254900HROIFWPRGM1V77 91282CPC9 2028-10-15 3.500000 0.00 5862900.00 5825493.29 U.S. Treasuries (including strips) US TREASURY N/B 254900HROIFWPRGM1V77 91282CQA2 2029-02-15 3.500000 0.00 100.00 99.77 U.S. Treasuries (including strips) Y Fitch, Inc. NR Moody's Investors Service, Inc. NR Standard and Poor's Ratings Services NR 2026-07-01 2026-07-01 2026-07-01 N N N 0.0364 25000000.00 25000000.00 0.0481 N Y Y N TD SECURITIES (USA) LLC TD SECURITIES (USA) LLC 3.640000% N/A SUVUFHICNZMP2WKHG940 0000803012 LMRP10642347 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N N N US TREASURY N/B 254900HROIFWPRGM1V77 91282CMY4 2027-04-30 3.750000 0.00 5080600.00 5100089.35 U.S. Treasuries (including strips) Y Fitch, Inc. NR Moody's Investors Service, Inc. NR Standard and Poor's Ratings Services NR 2026-07-01 2026-07-01 2026-07-01 N N N 0.0364 5000000.00 5000000.00 0.0096 N Y Y N SOCIETE GENERALE, NEW YORK BRANCH SOCIETE GENERALE, NEW YORK BRANCH 3.640000% N/A 254900J6B390XMPVLV82 LMRP10642357 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N N N US TREASURY N/B 254900HROIFWPRGM1V77 912810UJ5 2045-02-15 4.750000 0.00 50731500.00 51000077.05 U.S. Treasuries (including strips) Y Fitch, Inc. NR Moody's Investors Service, Inc. NR Standard and Poor's Ratings Services NR 2026-07-01 2026-07-01 2026-07-01 N N N 0.0364 50000000.00 50000000.00 0.0962 N Y Y N HSBC BANK USA HSBC BANK USA 3.630000% N/A N/A LMRP10642377 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N N N US TREASURY N/B 254900HROIFWPRGM1V77 912810FP8 2031-02-15 5.375000 0.00 1800300.00 1928475.76 U.S. Treasuries (including strips) US TREASURY N/B 254900HROIFWPRGM1V77 912810QY7 2042-11-15 2.750000 0.00 759800.00 583557.17 U.S. Treasuries (including strips) US TREASURY N/B 254900HROIFWPRGM1V77 912810SX7 2051-05-15 2.375000 0.00 100.00 63.33 U.S. Treasuries (including strips) US TREASURY N/B 254900HROIFWPRGM1V77 912810TC2 2041-11-15 2.000000 0.00 5000.00 3497.68 U.S. Treasuries (including strips) US TREASURY N/B 254900HROIFWPRGM1V77 912810UB2 2044-05-15 4.625000 0.00 1000.00 978.10 U.S. Treasuries (including strips) US TREASURY N/B 254900HROIFWPRGM1V77 91282CEV9 2029-06-30 3.250000 0.00 7879400.00 7682675.02 U.S. Treasuries (including strips) US TREASURY N/B 254900HROIFWPRGM1V77 91282CLM1 2031-09-30 3.625000 0.00 1000.00 982.77 U.S. Treasuries (including strips) US TREASURY N/B 254900HROIFWPRGM1V77 91282CQJ3 2029-04-15 3.875000 0.00 200.00 200.24 U.S. Treasuries (including strips) US TREASURY N/B 254900HROIFWPRGM1V77 91282CQN4 2033-04-30 4.125000 0.00 600.00 599.04 U.S. Treasuries (including strips) Y Fitch, Inc. NR Moody's Investors Service, Inc. NR Standard and Poor's Ratings Services NR 2026-07-01 2026-07-01 2026-07-01 N N N 0.0363 10000000.00 10000000.00 0.0192 N Y Y N FIXED INCOME CLEARING CORP / STATE STREET FIXED INCOME CLEARING CORP / STATE STREET 3.650000% N/A 549300H47WTHXPU08X20 LMRP10643357 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N Y FIXED INCOME CLEARING CORPORATION N US TREASURY N/B 254900HROIFWPRGM1V77 91282CLQ2 2027-10-15 3.875000 0.00 50744400.00 51000165.48 U.S. Treasuries (including strips) Y Fitch, Inc. NR Moody's Investors Service, Inc. NR Standard and Poor's Ratings Services NR 2026-07-01 2026-07-01 2026-07-01 N N N 0.0365 50000000.00 50000000.00 0.0962 N Y Y N FIXED INCOME CLEARING CORP / BNY FIXED INCOME CLEARING CORP / BNY 3.640000% N/A 549300H47WTHXPU08X20 LMRP10643367 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N Y FIXED INCOME CLEARING CORPORATION N US TREASURY N/B 254900HROIFWPRGM1V77 91282CDY4 2032-02-15 1.875000 0.00 11436200.00 10200088.63 U.S. Treasuries (including strips) Y Fitch, Inc. NR Moody's Investors Service, Inc. NR Standard and Poor's Ratings Services NR 2026-07-01 2026-07-01 2026-07-01 N N N 0.0364 10000000.00 10000000.00 0.0192 N Y Y N CANADIAN IMPERIAL BANK OF COMMERCE NY CANADIAN IMPERIAL BANK OF COMMERCE NY 3.640000% N/A 549300H8L46OOZOFHU82 0001045520 LMRP10643387 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N N N US TREASURY N/B 254900HROIFWPRGM1V77 912810TH1 2042-05-15 3.250000 0.00 600.00 499.48 U.S. Treasuries (including strips) US TREASURY N/B 254900HROIFWPRGM1V77 912810UF3 2044-11-15 4.625000 0.00 3100.00 3024.94 U.S. Treasuries (including strips) US TREASURY N/B 254900HROIFWPRGM1V77 912810UG1 2055-02-15 4.625000 0.00 1100.00 1071.82 U.S. Treasuries (including strips) US TREASURY N/B 254900HROIFWPRGM1V77 912810UK2 2055-05-15 4.750000 0.00 3800.00 3735.40 U.S. Treasuries (including strips) TSY INFL IX N/B 254900HROIFWPRGM1V77 9128287D6 2029-07-15 0.250000 0.00 41900.00 52095.09 U.S. Treasuries (including strips) US TREASURY N/B 254900HROIFWPRGM1V77 91282CHZ7 2030-09-30 4.625000 0.00 4799800.00 4939619.70 U.S. Treasuries (including strips) TSY INFL IX N/B 254900HROIFWPRGM1V77 91282CNB3 2030-04-15 1.625000 0.00 5007800.00 5195090.40 U.S. Treasuries (including strips) US TREASURY N/B 254900HROIFWPRGM1V77 91282CQE4 2029-03-15 3.500000 0.00 6000.00 5964.35 U.S. Treasuries (including strips) Y Fitch, Inc. NR Moody's Investors Service, Inc. NR Standard and Poor's Ratings Services NR 2026-07-01 2026-07-01 2026-07-01 N N N 0.0364 10000000.00 10000000.00 0.0192 N Y Y N JP MORGAN SECURITIES, LLC JP MORGAN SECURITIES, LLC 3.640000% N/A ZBUT11V806EZRVTWT807 0000782124 LMRP10644137 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N N N US TREASURY N/B 254900HROIFWPRGM1V77 912810SH2 2049-05-15 2.875000 0.00 800.00 575.21 U.S. Treasuries (including strips) US TREASURY N/B 254900HROIFWPRGM1V77 912810ST6 2040-11-15 1.375000 0.00 1900.00 1238.94 U.S. Treasuries (including strips) US TREASURY N/B 254900HROIFWPRGM1V77 91282CAE1 2030-08-15 0.625000 0.00 5865500.00 5098702.02 U.S. Treasuries (including strips) Y Fitch, Inc. NR Moody's Investors Service, Inc. NR Standard and Poor's Ratings Services NR 2026-07-01 2026-07-01 2026-07-01 N N N 0.0364 5000000.00 5000000.00 0.0096 N Y Y N Master Portfolio Trust 2026-07-08 /s/Christopher Berarducci Christopher Berarducci Principal Financial Officer