| Coupon | Maturity Date | Face Amount ($000) | Market Value ($000) | |||
| U.S. Government and Agency Obligations (98.9%) | ||||||
| U.S. Government Securities (98.9%) | ||||||
| United States Treasury Inflation Indexed Bonds | 0.125% | 4/15/2027 | 804,699 | 799,987 | ||
| United States Treasury Inflation Indexed Bonds | 0.375% | 7/15/2027 | 541,493 | 541,326 | ||
| United States Treasury Inflation Indexed Bonds | 1.625% | 10/15/2027 | 806,920 | 819,215 | ||
| United States Treasury Inflation Indexed Bonds | 0.500% | 1/15/2028 | 728,781 | 723,113 | ||
| United States Treasury Inflation Indexed Bonds | 1.750% | 1/15/2028 | 300,810 | 305,134 | ||
| United States Treasury Inflation Indexed Bonds | 1.250% | 4/15/2028 | 814,094 | 817,213 | ||
| 1 | United States Treasury Inflation Indexed Bonds | 3.625% | 4/15/2028 | 308,797 | 324,710 | |
| United States Treasury Inflation Indexed Bonds | 0.750% | 7/15/2028 | 868,615 | 866,103 | ||
| United States Treasury Inflation Indexed Bonds | 2.375% | 10/15/2028 | 839,576 | 869,395 | ||
| United States Treasury Inflation Indexed Bonds | 0.875% | 1/15/2029 | 565,196 | 561,221 | ||
| United States Treasury Inflation Indexed Bonds | 2.500% | 1/15/2029 | 297,147 | 308,315 | ||
| United States Treasury Inflation Indexed Bonds | 2.125% | 4/15/2029 | 840,925 | 863,303 | ||
| United States Treasury Inflation Indexed Bonds | 3.875% | 4/15/2029 | 354,587 | 382,599 | ||
| United States Treasury Inflation Indexed Bonds | 0.250% | 7/15/2029 | 564,497 | 549,148 | ||
| United States Treasury Inflation Indexed Bonds | 1.625% | 10/15/2029 | 870,318 | 884,062 | ||
| 2 | United States Treasury Inflation Indexed Bonds | 0.125% | 1/15/2030 | 750,288 | 718,076 | |
| United States Treasury Inflation Indexed Bonds | 1.625% | 4/15/2030 | 892,350 | 901,449 | ||
| United States Treasury Inflation Indexed Bonds | 0.125% | 7/15/2030 | 791,744 | 753,607 | ||
| United States Treasury Inflation Indexed Bonds | 1.125% | 10/15/2030 | 611,621 | 606,175 | ||
| United States Treasury Inflation Indexed Bonds | 0.125% | 1/15/2031 | 826,006 | 776,507 | ||
| United States Treasury Inflation Indexed Bonds | 0.125% | 7/15/2031 | 841,548 | 786,281 | ||
| United States Treasury Inflation Indexed Bonds | 0.125% | 1/15/2032 | 933,888 | 859,498 | ||
| United States Treasury Inflation Indexed Bonds | 3.375% | 4/15/2032 | 130,138 | 143,586 | ||
| United States Treasury Inflation Indexed Bonds | 0.625% | 7/15/2032 | 968,596 | 913,878 | ||
| United States Treasury Inflation Indexed Bonds | 1.125% | 1/15/2033 | 950,796 | 916,215 | ||
| United States Treasury Inflation Indexed Bonds | 1.375% | 7/15/2033 | 929,400 | 908,998 | ||
| United States Treasury Inflation Indexed Bonds | 1.750% | 1/15/2034 | 956,227 | 952,310 | ||
| United States Treasury Inflation Indexed Bonds | 1.875% | 7/15/2034 | 1,022,447 | 1,027,558 | ||
| United States Treasury Inflation Indexed Bonds | 2.125% | 1/15/2035 | 1,077,166 | 1,095,355 | ||
| United States Treasury Inflation Indexed Bonds | 1.875% | 7/15/2035 | 633,520 | 630,873 | ||
| United States Treasury Inflation Indexed Bonds | 1.875% | 1/15/2036 | 645,803 | 638,109 | ||
| United States Treasury Inflation Indexed Bonds | 2.125% | 2/15/2040 | 164,181 | 160,646 | ||
| 2 | United States Treasury Inflation Indexed Bonds | 2.125% | 2/15/2041 | 248,672 | 240,415 | |
| United States Treasury Inflation Indexed Bonds | 0.750% | 2/15/2042 | 384,912 | 296,252 | ||
| United States Treasury Inflation Indexed Bonds | 0.625% | 2/15/2043 | 233,828 | 172,122 | ||
| United States Treasury Inflation Indexed Bonds | 1.375% | 2/15/2044 | 432,870 | 357,432 | ||
| United States Treasury Inflation Indexed Bonds | 0.750% | 2/15/2045 | 630,868 | 452,429 | ||
| United States Treasury Inflation Indexed Bonds | 1.000% | 2/15/2046 | 240,950 | 178,559 | ||
| United States Treasury Inflation Indexed Bonds | 0.875% | 2/15/2047 | 219,898 | 155,846 | ||
| United States Treasury Inflation Indexed Bonds | 1.000% | 2/15/2048 | 213,647 | 153,243 | ||
| United States Treasury Inflation Indexed Bonds | 1.000% | 2/15/2049 | 194,377 | 137,447 | ||
| 3 | United States Treasury Inflation Indexed Bonds | 0.250% | 2/15/2050 | 302,707 | 171,298 | |
| United States Treasury Inflation Indexed Bonds | 0.125% | 2/15/2051 | 303,911 | 161,282 | ||
| United States Treasury Inflation Indexed Bonds | 0.125% | 2/15/2052 | 362,541 | 187,963 | ||
| United States Treasury Inflation Indexed Bonds | 1.500% | 2/15/2053 | 334,836 | 256,637 | ||
| United States Treasury Inflation Indexed Bonds | 2.125% | 2/15/2054 | 321,340 | 283,137 | ||
| United States Treasury Inflation Indexed Bonds | 2.375% | 2/15/2055 | 329,125 | 305,723 | ||
| United States Treasury Inflation Indexed Bonds | 2.375% | 2/15/2056 | 168,583 | 156,458 | ||
| United States Treasury Note/Bond | 3.625% | 10/31/2030 | 340,316 | 335,956 | ||
| United States Treasury Note/Bond | 1.125% | 2/15/2031 | 22,507 | 19,729 | ||
| United States Treasury Note/Bond | 4.250% | 2/28/2031 | 40,000 | 40,519 | ||
| United States Treasury Note/Bond | 4.125% | 3/31/2031 | 10,000 | 10,070 | ||
| United States Treasury Note/Bond | 4.625% | 4/30/2031 | 9,412 | 9,691 | ||
| United States Treasury Note/Bond | 1.625% | 5/15/2031 | 22,136 | 19,741 | ||
| United States Treasury Note/Bond | 4.625% | 5/31/2031 | 9,650 | 9,935 | ||
| United States Treasury Note/Bond | 1.250% | 8/15/2031 | 24,260 | 21,051 | ||
| United States Treasury Note/Bond | 3.750% | 8/31/2031 | 40,000 | 39,503 | ||
| United States Treasury Note/Bond | 1.375% | 11/15/2031 | 23,734 | 20,582 | ||
| United States Treasury Note/Bond | 1.875% | 2/15/2032 | 22,326 | 19,797 | ||
| United States Treasury Note/Bond | 4.125% | 2/29/2032 | 9,413 | 9,451 | ||
| United States Treasury Note/Bond | 2.875% | 5/15/2032 | 21,701 | 20,299 | ||
| United States Treasury Note/Bond | 2.750% | 8/15/2032 | 20,830 | 19,268 | ||
| Coupon | Maturity Date | Face Amount ($000) | Market Value ($000) | |||
| United States Treasury Note/Bond | 4.125% | 11/15/2032 | 21,176 | 21,182 | ||
| United States Treasury Note/Bond | 3.500% | 2/15/2033 | 21,154 | 20,352 | ||
| United States Treasury Note/Bond | 3.375% | 5/15/2033 | 21,138 | 20,140 | ||
| United States Treasury Note/Bond | 3.875% | 8/15/2033 | 23,072 | 22,651 | ||
| United States Treasury Note/Bond | 4.500% | 11/15/2033 | 24,371 | 24,878 | ||
| United States Treasury Note/Bond | 4.000% | 2/15/2034 | 25,532 | 25,194 | ||
| United States Treasury Note/Bond | 4.375% | 5/15/2034 | 25,647 | 25,920 | ||
| United States Treasury Note/Bond | 3.875% | 8/15/2034 | 25,640 | 24,984 | ||
| United States Treasury Note/Bond | 4.250% | 11/15/2034 | 27,000 | 26,992 | ||
| United States Treasury Note/Bond | 4.625% | 2/15/2035 | 25,629 | 26,296 | ||
| United States Treasury Note/Bond | 4.250% | 5/15/2035 | 25,670 | 25,603 | ||
| United States Treasury Note/Bond | 4.250% | 8/15/2035 | 537,000 | 535,070 | ||
| United States Treasury Note/Bond | 4.000% | 11/15/2035 | 113,000 | 110,228 | ||
| Total U.S. Government and Agency Obligations (Cost $28,051,474) | 27,575,290 | |||||
| Shares | ||||||
| Temporary Cash Investments (1.0%) | ||||||
| Money Market Fund (1.0%) | ||||||
| 4 | Vanguard Market Liquidity Fund (Cost $280,199) | 3.687% | 2,802,192 | 280,191 | ||
| Counterparty | Expiration Date | Exercise Rate | Notional Amount on Underlying Swap ($000) | |||
| Options Purchased (0.0%) | ||||||
| Over-the-Counter Swaptions (0.0%) | ||||||
| Call Swaptions | ||||||
| 2-Year Interest Rate Swap, Pays SOFR Annually, Receives 3.270% Annually | WFB | 7/16/2026 | 3.270% | 289,370 | 738 | |
| 10-Year Interest Rate Swap, Pays SOFR Annually, Receives 3.350% Annually | NGFP | 10/16/2030 | 3.350% | 149,500 | 3,900 | |
| 30-Year Interest Rate Swap, Pays SOFR Annually, Receives 3.690% Annually | WFB | 7/16/2026 | 3.690% | 32,410 | 200 | |
| 4,838 | ||||||
| Put Swaptions | ||||||
| 2-Year Interest Rate Swap, Receives SOFR Annually, Pays 3.450% Annually | JPMC | 2/5/2027 | 3.450% | 147,250 | 1,201 | |
| 2-Year Interest Rate Swap, Receives SOFR Annually, Pays 3.500% Annually | WFB | 1/21/2027 | 3.500% | 148,540 | 1,116 | |
| 2-Year Interest Rate Swap, Receives SOFR Annually, Pays 3.600% Annually | JPMC | 1/20/2028 | 3.600% | 156,870 | 1,492 | |
| 5-Year Interest Rate Swap, Receives SOFR Annually, Pays 3.500% Annually | BNPSW | 5/13/2026 | 3.500% | 122,180 | 1,194 | |
| 5-Year Interest Rate Swap, Receives SOFR Annually, Pays 3.690% Annually | BNPSW | 4/8/2026 | 3.690% | 233,070 | 385 | |
| 10-Year Interest Rate Swap, Receives SOFR Annually, Pays 5.144% Annually | JPMC | 2/2/2028 | 5.144% | 85,170 | 935 | |
| 6,323 | ||||||
| Total Options Purchased (Cost $10,614) | 11,161 | |||||
| Total Investments (99.9%) (Cost $28,342,287) | 27,866,642 | |||||
| Other Assets and Liabilities—Net (0.1%) | 18,848 | |||||
| Net Assets (100%) | 27,885,490 | |||||
| Cost is in $000. |
| 1 | Securities with a value of $63,951 have been segregated as initial margin for open centrally cleared swap contracts. |
| 2 | Securities with a value of $1,697 have been segregated as collateral for open over-the-counter swaptions. |
| 3 | Securities with a value of $33,164 have been segregated as initial margin for open futures contracts. |
| 4 | Affiliated money market fund available only to Vanguard funds and certain trusts and accounts managed by Vanguard. Rate shown is the 7-day yield. |
| BNPSW—BNP Paribas. | |
| JPMC—JPMorgan Chase Bank, N.A. | |
| NGFP—Normura Global Financial Products Inc. | |
| SOFR—Secured Overnight Financing Rate. | |
| WFB—Wells Fargo Bank N.A. |
| Options Written |
| Counterparty | Expiration Date | Exercise Rate | Notional Amount on Underlying Swap ($000) | Market Value ($000) | |
| Over-the-Counter Swaptions | |||||
| Call Swaptions | |||||
| 2-Year Interest Rate Swap, Receives SOFR Annually, Pays 2.870% Annually | WFB | 7/16/2026 | 2.870% | 289,370 | (336) |
| 10-Year Interest Rate Swap, Receives SOFR Annually, Pays 3.144% Annually | JPMC | 2/2/2028 | 3.144% | 85,170 | (1,046) |
| 10-Year Interest Rate Swap, Receives SOFR Annually, Pays 3.608% Annually | NGFP | 10/16/2035 | 3.608% | 125,700 | (5,618) |
| 30-Year Interest Rate Swap, Receives SOFR Annually, Pays 4.090% Annually | WFB | 7/16/2026 | 4.090% | 32,410 | (788) |
| (7,788) | |||||
| Put Swaptions | |||||
| 2-Year Interest Rate Swap, Pays SOFR Annually, Receives 3.750% Annually | JPMC | 2/5/2027 | 3.750% | 294,500 | (1,575) |
| 2-Year Interest Rate Swap, Pays SOFR Annually, Receives 3.750% Annually | WFB | 1/21/2027 | 3.750% | 297,080 | (1,550) |
| 2-Year Interest Rate Swap, Pays SOFR Annually, Receives 3.850% Annually | JPMC | 1/20/2028 | 3.850% | 156,870 | (1,170) |
| 2-Year Interest Rate Swap, Pays SOFR Annually, Receives 4.100% Annually | JPMC | 1/20/2028 | 4.100% | 156,870 | (910) |
| 5-Year Interest Rate Swap, Pays SOFR Annually, Receives 3.460% Annually | BNPSW | 4/8/2026 | 3.460% | 116,540 | (946) |
| 5-Year Interest Rate Swap, Pays SOFR Annually, Receives 3.700% Annually | BNPSW | 5/13/2026 | 3.700% | 122,180 | (589) |
| 5-Year Interest Rate Swap, Pays SOFR Annually, Receives 3.800% Annually | BNPSW | 5/13/2026 | 3.800% | 122,180 | (393) |
| (7,133) | |||||
| Total Options Written (Premiums Received $12,587) | (14,921) | ||||
| BNPSW—BNP Paribas. |
| JPMC—JPMorgan Chase Bank, N.A. |
| NGFP—Normura Global Financial Products Inc. |
| WFB—Wells Fargo Bank N.A. |
| Futures Contracts | ||||
| ($000) | ||||
| Expiration | Number of Long (Short) Contracts | Notional Amount | Value and Unrealized Appreciation (Depreciation) | |
| Long Futures Contracts | ||||
| 2-Year U.S. Treasury Note | June 2026 | 4,038 | 837,664 | (5,837) |
| 5-Year U.S. Treasury Note | June 2026 | 9,364 | 1,012,995 | (8,348) |
| 10-Year U.S. Treasury Note | June 2026 | 1,520 | 168,791 | (128) |
| Long U.S. Treasury Bond | June 2026 | 4,181 | 476,112 | (3,559) |
| (17,872) | ||||
| Short Futures Contracts | ||||
| Ultra 10-Year U.S. Treasury Note | June 2026 | (452) | (51,309) | 454 |
| Ultra Long U.S. Treasury Bond | June 2026 | (1,594) | (185,801) | 942 |
| 1,396 | ||||
| (16,476) | ||||
| Centrally Cleared Interest Rate Swaps | ||||||
| Termination Date | Future Effective Date | Notional Amount (000)1 | Interest Rate Received (%) | Interest Rate (Paid) (%) | Value ($000) | Unrealized Appreciation (Depreciation) ($000) |
| 3/15/2028 | 7/6/20262 | 1,032,900 | 0.0003 | (3.157)4 | 7,479 | 7,238 |
| 8/31/2030 | 7/6/20262 | 1,037,000 | 0.0003 | (3.252)4 | 12,890 | 13,359 |
| 8/31/2030 | 7/6/20262 | 73,450 | 0.0003 | (3.309)4 | 751 | 751 |
| 2/12/2031 | N/A | 100,000 | 0.0005 | (2.450)6 | 380 | 380 |
| 2/12/2031 | N/A | 20,000 | 0.0005 | (2.465)6 | 63 | 63 |
| 2/17/2031 | N/A | 192,000 | 0.0005 | (2.441)6 | 798 | 798 |
| 4/10/2031 | 4/10/20262 | 25,040 | 0.0003 | (3.613)4 | — | — |
| 11/15/2035 | 6/30/20262 | 106,260 | 0.0003 | (3.572)4 | 2,235 | 2,212 |
| 11/15/2035 | 6/30/20262 | 35,800 | 0.0003 | (3.682)4 | 446 | 446 |
| 11/15/2035 | 6/30/20262 | 35,800 | 0.0003 | (3.892)4 | (146) | (146) |
| 1/8/2036 | N/A | 100,000 | 0.0005 | (2.417)6 | (156) | (156) |
| 1/8/2036 | N/A | 44,000 | 0.0005 | (2.420)6 | (80) | (80) |
| 1/8/2036 | N/A | 16,000 | 0.0005 | (2.422)6 | (32) | (32) |
| 1/9/2036 | N/A | 50,000 | 0.0005 | (2.411)6 | (47) | (47) |
| 1/12/2036 | N/A | 50,000 | 0.0005 | (2.411)6 | (33) | (33) |
| 1/21/2036 | N/A | 50,000 | 0.0005 | (2.439)6 | (103) | (103) |
| 1/23/2036 | N/A | 110,000 | 0.0005 | (2.468)6 | (473) | (473) |
| 1/23/2036 | N/A | 50,000 | 0.0005 | (2.453)6 | (151) | (151) |
| 2/12/2036 | N/A | 100,000 | 0.0005 | (2.466)6 | (337) | (337) |
| 2/4/2038 | 2/4/20282 | 27,190 | 4.1444 | (0.000)3 | 253 | 253 |
| 3/13/2038 | 3/13/20282 | 6,550 | 3.8594 | (0.000)3 | (91) | (91) |
| 10/18/2040 | 10/18/20302 | 59,800 | 0.0003 | (4.100)4 | 1,040 | 1,040 |
| 1/22/2041 | 1/22/20312 | 10,550 | 4.5174 | (0.000)3 | 100 | 100 |
| 10/18/2045 | 10/18/20352 | 66,300 | 4.3584 | (0.000)3 | (1,023) | (1,023) |
| 1/22/2046 | 1/22/20362 | 12,980 | 0.0003 | (4.781)4 | (96) | (96) |
| 23,667 | 23,872 | |||||
| 1 Notional amount denominated in U.S. dollar. |
| 2 Forward interest rate swap. In a forward interest rate swap, the fund and the counterparty agree to make periodic net payments beginning on a specified future effective date. |
| 3 Based on Secured Overnight Financing Rate (SOFR) as of the most recent reset date. Interest payment received/(paid) annually. |
| 4 Interest payment received/(paid) annually. |
| 5 Zero-coupon. Based on the return of US Consumer Price Index for All Urban Consumers (USCPIU). Interest payment received/(paid) at maturity. |
| 6 Interest payment received/(paid) at maturity. |
| Level 1 ($000) | Level 2 ($000) | Level 3 ($000) | Total ($000) | |
| Investments | ||||
| Assets | ||||
| U.S. Government and Agency Obligations | — | 27,575,290 | — | 27,575,290 |
| Temporary Cash Investments | 280,191 | — | — | 280,191 |
| Options Purchased | — | 11,161 | — | 11,161 |
| Total | 280,191 | 27,586,451 | — | 27,866,642 |
| Derivative Financial Instruments | ||||
| Assets | ||||
| Futures Contracts1 | 1,396 | — | — | 1,396 |
| Swap Contracts1 | — | 26,640 | — | 26,640 |
| Total | 1,396 | 26,640 | — | 28,036 |
| Liabilities | ||||
| Options Written | — | (14,921) | — | (14,921) |
| Futures Contracts1 | (17,872) | — | — | (17,872) |
| Swap Contracts1 | — | (2,768) | — | (2,768) |
| Total | (17,872) | (17,689) | — | (35,561) |
| 1 | Includes cumulative appreciation (depreciation) on futures contracts and centrally cleared swaps, if any, as reported in the Schedule of Investments. | |||