N-MFP3 0001034386 XXXXXXXX 2026-09-30 T. ROWE PRICE RESERVE INVESTMENT FUNDS, INC. 0001034386 549300OHDX5YN5HMNT85 T. Rowe Price Government Reserve Fund 5493002Y0IYARJVQ5N24 S000002153 1 N N T. Rowe Price Associates, Inc. 801-00856 PricewaterhouseCoopers LLP Baltimore MD None T. 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Aa1 Standard and Poor's Ratings Services AA+ 2026-10-08 2027-05-07 2027-05-07 N N N 0.0452 114576062.41 114576062.41 0.0120 N N N N FEDERAL RESERVE BK OF NY TREASURY REPO 3.7500 20261001 FEDERAL RESERVE BK OF NY TREASURY REPO 3.7500 20261001 3.750000% 3139937D3 N/A N/A 3139937D3 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N N Y USTR 254900HROIFWPRGM1V77 91282CCB5 2031-05-15 1.625000 0.00 2298843800.00 1990207353.41 U.S. Treasuries (including strips) Y Standard and Poor's Ratings Services A-1+ 2026-10-01 2026-10-01 2026-10-01 N N N 0.0375 1990000000.00 1990000000.00 0.2079 N Y Y N FIXED INCOME CLEARING BNYM TREASURY REPO 3.8400 20261001 FIXED INCOME CLEARING BNYM TREASURY REPO 3.8400 20261001 3.840000% 3379881N9 N/A N/A 3379881N9 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N Y Fixed Income Clearing Corp N USTR 254900HROIFWPRGM1V77 91282CEP2 2032-05-15 2.875000 0.00 216668400.00 195508834.89 U.S. Treasuries (including strips) USTR 254900HROIFWPRGM1V77 91282CPA3 2030-09-30 3.625000 0.00 492541900.00 467491219.00 U.S. Treasuries (including strips) Y Standard and Poor's Ratings Services A-1+ 2026-10-01 2026-10-01 2026-10-01 N N N 0.0384 650000000.00 650000000.00 0.0679 N Y Y N FIXED INCOME CLEARING SSBT TREASURY REPO 3.8800 20261001 FIXED INCOME CLEARING SSBT TREASURY REPO 3.8800 20261001 3.880000% 3379899X7 N/A N/A 3379899X7 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N Y Fixed Income Clearing Corp N USTR 254900HROIFWPRGM1V77 91282CLC3 2029-07-31 4.000000 0.00 227714300.00 223380140.90 U.S. Treasuries (including strips) Y Standard and Poor's Ratings Services A-1+ 2026-10-01 2026-10-01 2026-10-01 N N N 0.0388 219000000.00 219000000.00 0.0229 N Y Y N TD SECURITIES USA LLC TREASURY REPO 3.8800 20261001 TD SECURITIES USA LLC TREASURY REPO 3.8800 20261001 3.880000% 8919927N3 N/A N/A 8919927N3 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N N Y USTR 254900HROIFWPRGM1V77 91282CPM7 2032-11-30 3.750000 0.00 27305400.00 25674448.46 U.S. Treasuries (including strips) USTR 254900HROIFWPRGM1V77 91282CQS3 2028-05-31 4.000000 0.00 56110000.00 56101770.53 U.S. Treasuries (including strips) USTR 254900HROIFWPRGM1V77 91282CRB9 2028-07-31 4.250000 0.00 33612100.00 33483864.35 U.S. Treasuries (including strips) Y Standard and Poor's Ratings Services A-1 2026-10-01 2026-10-01 2026-10-01 N N N 0.0388 113000000.00 113000000.00 0.0118 N Y Y N TD SECURITIES USA LLC MORTGAGE REPO 3.8900 20261001 TD SECURITIES USA LLC MORTGAGE REPO 3.8900 20261001 3.890000% 8919944B8 N/A N/A 8919944B8 U.S. Government Agency Repurchase Agreement, collateralized only by U.S. Government Agency securities, U.S. Treasuries, and cash Y N N Y GNMA 549300M8ZYFG0OCMTT87 36179VVY3 2050-10-20 2.500000 0.00 50918172.00 17158285.00 Agency Mortgage-Backed Securities GNMA 549300M8ZYFG0OCMTT87 3618MXRC5 2056-05-20 5.500000 0.00 7477186.00 7321715.07 Agency Mortgage-Backed Securities Y Standard and Poor's Ratings Services A-1 2026-10-01 2026-10-01 2026-10-01 N N N 0.0389 24000000.00 24000000.00 0.0025 N Y Y N UNITED STATES TREASURY BILL UNITED STATES TREASURY BILL 0.00000% 912797TC1 254900HROIFWPRGM1V77 US912797TC16 N/A U.S. Treasury Debt Y Fitch, Inc. F-1+ 2026-12-24 2026-12-24 2026-12-24 N N N 0.0409 74305198.31 74305198.31 0.0078 N Y Y N UNITED STATES TREASURY BILL UNITED STATES TREASURY BILL 0.00000% 912797UK1 254900HROIFWPRGM1V77 US912797UK13 N/A U.S. Treasury Debt Y Fitch, Inc. F-1+ 2026-10-15 2026-10-15 2026-10-15 N N N 0.0387 249629900.98 249629900.98 0.0261 N Y Y N UNITED STATES TREASURY BILL UNITED STATES TREASURY BILL 0.00000% 912797UL9 254900HROIFWPRGM1V77 US912797UL95 N/A U.S. Treasury Debt Y Fitch, Inc. F-1+ 2026-10-22 2026-10-22 2026-10-22 N N N 0.0390 349217556.91 349217556.91 0.0365 N Y Y N UNITED STATES TREASURY BILL UNITED STATES TREASURY BILL 0.00000% 912797UM7 254900HROIFWPRGM1V77 US912797UM78 N/A U.S. Treasury Debt Y Fitch, Inc. F-1+ 2026-11-05 2026-11-05 2026-11-05 N N N 0.0398 542935041.76 542935041.76 0.0567 N Y Y N UNITED STATES TREASURY BILL UNITED STATES TREASURY BILL 0.00000% 912797UY1 254900HROIFWPRGM1V77 US912797UY17 N/A U.S. Treasury Debt Y Fitch, Inc. F-1+ 2026-11-12 2026-11-12 2026-11-12 N N N 0.0402 476100207.14 476100207.14 0.0497 N Y Y N UNITED STATES TREASURY BILL UNITED STATES TREASURY BILL 0.00000% 912797UZ8 254900HROIFWPRGM1V77 US912797UZ81 N/A U.S. Treasury Debt Y Fitch, Inc. F-1+ 2026-11-19 2026-11-19 2026-11-19 N N N 0.0404 124326481.19 124326481.19 0.0130 N Y Y N UNITED STATES TREASURY BILL UNITED STATES TREASURY BILL 0.00000% 912797VG9 254900HROIFWPRGM1V77 US912797VG91 N/A U.S. Treasury Debt Y Fitch, Inc. F-1+ 2026-12-10 2026-12-10 2026-12-10 N N N 0.0405 146862642.97 146862642.97 0.0153 N Y Y N UNITED STATES TREASURY BILL UNITED STATES TREASURY BILL 0.00000% 912797VM6 254900HROIFWPRGM1V77 US912797VM69 N/A U.S. Treasury Debt Y Fitch, Inc. F-1+ 2026-10-20 2026-10-20 2026-10-20 N N N 0.0391 124747238.44 124747238.44 0.0130 N Y Y N UNITED STATES TREASURY BILL UNITED STATES TREASURY BILL 0.00000% 912797VN4 254900HROIFWPRGM1V77 US912797VN43 N/A U.S. Treasury Debt Y Fitch, Inc. F-1+ 2026-10-27 2026-10-27 2026-10-27 N N N 0.0392 249307855.18 249307855.18 0.0260 N Y Y N UNITED STATES TREASURY BILL UNITED STATES TREASURY BILL 0.00000% 912797VP9 254900HROIFWPRGM1V77 US912797VP90 N/A U.S. Treasury Debt Y Fitch, Inc. F-1+ 2026-11-03 2026-11-03 2026-11-03 N N N 0.0396 244125794.28 244125794.28 0.0255 N Y Y N UNITED STATES TREASURY BILL UNITED STATES TREASURY BILL 0.00000% 912797WB9 254900HROIFWPRGM1V77 US912797WB95 N/A U.S. Treasury Debt Y Fitch, Inc. F-1+ 2027-02-11 2027-02-11 2027-02-11 N N N 0.0424 172348154.14 172348154.14 0.0180 N Y Y N UNITED STATES TREASURY BILL UNITED STATES TREASURY BILL 0.00000% 912797WG8 254900HROIFWPRGM1V77 US912797WG82 N/A U.S. Treasury Debt Y Fitch, Inc. F-1+ 2026-12-22 2026-12-22 2026-12-22 N N N 0.0407 188291316.70 188291316.70 0.0197 N Y Y N UNITED STATES TREASURY NOTE/BOND UNITED STATES TREASURY NOTE/BOND 0.500000% 912828ZS2 254900HROIFWPRGM1V77 US912828ZS21 N/A U.S. Treasury Debt Y Fitch, Inc. AA+ Moody's Investors Service, Inc. Aa1 2027-05-31 2027-05-31 2027-05-31 N N N 0.0445 58474218.75 58474218.75 0.0061 N Y Y N UNITED STATES TREASURY NOTE/BOND UNITED STATES TREASURY NOTE/BOND 4.125000% 91282CKA8 254900HROIFWPRGM1V77 US91282CKA89 N/A U.S. Treasury Debt Y Fitch, Inc. AA+ Moody's Investors Service, Inc. Aa1 2027-02-15 2027-02-15 2027-02-15 N N N 0.0427 114946093.75 114946093.75 0.0120 N Y Y N UNITED STATES TREASURY NOTE/BOND UNITED STATES TREASURY NOTE/BOND 4.250000% 91282CME8 254900HROIFWPRGM1V77 US91282CME83 N/A U.S. Treasury Debt Y Fitch, Inc. AA+ Moody's Investors Service, Inc. Aa1 2026-12-31 2026-12-31 2026-12-31 N N N 0.0413 35004101.56 35004101.56 0.0037 N Y Y N UNITED STATES TREASURY NOTE/BOND UNITED STATES TREASURY NOTE/BOND 4.125000% 91282CMH1 254900HROIFWPRGM1V77 US91282CMH15 N/A U.S. Treasury Debt Y Fitch, Inc. AA+ Moody's Investors Service, Inc. Aa1 2027-01-31 2027-01-31 2027-01-31 N N N 0.0426 109944140.63 109944140.63 0.0115 N Y Y N UNITED STATES TREASURY NOTE/BOND UNITED STATES TREASURY NOTE/BOND 3.875000% 91282CMV0 254900HROIFWPRGM1V77 US91282CMV09 N/A U.S. Treasury Debt Y Fitch, Inc. AA+ Moody's Investors Service, Inc. Aa1 2027-03-31 2027-03-31 2027-03-31 N N N 0.0431 99789062.50 99789062.50 0.0104 N Y Y N UNITED STATES TREASURY NOTE/BOND UNITED STATES TREASURY NOTE/BOND 3.875000% 91282CNP2 254900HROIFWPRGM1V77 US91282CNP22 N/A U.S. Treasury Debt Y Fitch, Inc. AA+ Moody's Investors Service, Inc. Aa1 2027-07-31 2027-07-31 2027-07-31 N N N 0.0456 64639453.13 64639453.13 0.0068 N Y Y N UNITED STATES TREASURY FLOATING RATE NOTE UNITED STATES TREASURY FLOATING RATE NOTE 4.312148% 91282CNQ0 254900HROIFWPRGM1V77 US91282CNQ05 N/A U.S. Treasury Debt Y Fitch, Inc. AA+ Moody's Investors Service, Inc. Aa1 2026-10-01 2027-07-31 2027-07-31 N N N 0.0413 365353965.15 365353965.15 0.0382 N Y Y N UNITED STATES TREASURY NOTE/BOND UNITED STATES TREASURY NOTE/BOND 3.625000% 91282CNV9 254900HROIFWPRGM1V77 US91282CNV99 N/A U.S. Treasury Debt Y Fitch, Inc. AA+ Moody's Investors Service, Inc. Aa1 2027-08-31 2027-08-31 2027-08-31 N N N 0.0456 74378906.25 74378906.25 0.0078 N Y Y N UNITED STATES TREASURY FLOATING RATE NOTE UNITED STATES TREASURY FLOATING RATE NOTE 4.343148% 91282CPG0 254900HROIFWPRGM1V77 US91282CPG05 N/A U.S. Treasury Debt Y Fitch, Inc. AA+ Moody's Investors Service, Inc. Aa1 2026-10-01 2027-10-31 2027-10-31 N N N 0.0416 165317420.24 165317420.24 0.0173 N Y Y N UNITED STATES TREASURY FLOATING RATE NOTE UNITED STATES TREASURY FLOATING RATE NOTE 4.252148% 91282CPX3 254900HROIFWPRGM1V77 US91282CPX38 N/A U.S. Treasury Debt Y Fitch, Inc. AA+ Moody's Investors Service, Inc. Aa1 2026-10-01 2028-01-31 2028-01-31 N N N 0.0417 125133293.01 125133293.01 0.0131 N Y Y N UNITED STATES TREASURY FLOATING RATE NOTE UNITED STATES TREASURY FLOATING RATE NOTE 4.203148% 91282CRD5 254900HROIFWPRGM1V77 US91282CRD55 N/A U.S. Treasury Debt Y Fitch, Inc. AA+ Moody's Investors Service, Inc. Aa1 2026-10-01 2028-07-31 2028-07-31 N N N 0.0419 145046435.95 145046435.95 0.0152 N Y Y N WELLS FARGO SECURITIES MORTGAGE REPO 3.8800 20261001 WELLS FARGO SECURITIES MORTGAGE REPO 3.8800 20261001 3.880000% 9499844J4 PBLD0EJDB5FWOLXP3B76 N/A 9499844J4 U.S. Government Agency Repurchase Agreement, collateralized only by U.S. Government Agency securities, U.S. Treasuries, and cash Y N N Y FMAC S6XOOCT0IEG5ABCC6L87 3131XLJH1 2043-01-01 3.000000 0.00 209843.00 32994.17 Agency Mortgage-Backed Securities FMAC S6XOOCT0IEG5ABCC6L87 3132ADHH4 2043-12-01 4.500000 0.00 200000.00 29807.52 Agency Mortgage-Backed Securities FMAC S6XOOCT0IEG5ABCC6L87 3132ADHP6 2044-02-01 4.500000 0.00 200000.00 29786.23 Agency Mortgage-Backed Securities FMAC S6XOOCT0IEG5ABCC6L87 3132DVMV4 2054-05-01 6.500000 0.00 3972328.00 2304278.75 Agency Mortgage-Backed Securities FMAC S6XOOCT0IEG5ABCC6L87 31427TXZ4 2056-08-01 5.500000 0.00 55081393.00 51803452.47 Agency Mortgage-Backed Securities FMAC S6XOOCT0IEG5ABCC6L87 3142JCDK3 2041-08-01 3.500000 0.00 976135.00 879681.11 Agency Mortgage-Backed Securities Y Standard and Poor's Ratings Services A-1 2026-10-01 2026-10-01 2026-10-01 N N N 0.0388 54000000.00 54000000.00 0.0056 N Y Y N WELLS FARGO SECURITIES TREASURY REPO 3.8800 20261001 WELLS FARGO SECURITIES TREASURY REPO 3.8800 20261001 3.880000% 9499866K4 N/A N/A 9499866K4 U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash Y N N Y USTR 254900HROIFWPRGM1V77 91282CKP5 2029-04-30 4.625000 0.00 48406000.00 48960100.59 U.S. Treasuries (including strips) Y Standard and Poor's Ratings Services A-1 2026-10-01 2026-10-01 2026-10-01 N N N 0.0388 48000000.00 48000000.00 0.0050 N Y Y N T. ROWE PRICE RESERVE INVESTMENT FUNDS, INC. 2026-10-07 Alan S. Dupski Alan S. Dupski Treasurer & Vice President