NPORT-P false 0000862084 XXXXXXXX S000090173 C000257084 VANGUARD INSTITUTIONAL INDEX FUNDS 811-06093 0000862084 549300HU31ENFT74XN04 100 Vanguard Boulevard Malvern 19355 610-669-1000 VANGUARD ULTRA-SHORT TREASURY ETF S000090173 529900IZR0IZYR5N4F48 2026-12-31 2026-03-31 N 898424878.67 26934.91 898397943.76 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 218817.95000000 USD N United States Treasury Bill 254900HROIFWPRGM1V77 912797TU1 9392000.00000000 PA USD 9333446.14000000 1.038898876030 Long DBT UST US N 2 2026-06-02 None 0.00000000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 912828Z78 11738000.00000000 PA USD 11521580.63000000 1.282458481792 Long DBT UST US N 2 2027-01-31 Fixed 1.50000000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 91282CLY5 9214000.00000000 PA USD 9243153.65000000 1.028848486820 Long DBT UST US N 2 2026-11-30 Fixed 4.25000000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 91282CCW9 7560000.00000000 PA USD 7466385.96000000 0.831077810435 Long DBT UST US N 2 2026-08-31 Fixed 0.75000000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797TC1 6910000.00000000 PA USD 6729346.74000000 0.749038528721 Long DBT UST US N 2 2026-12-24 None 0.00000000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 912828YG9 2670000.00000000 PA USD 2641735.54000000 0.294049597769 Long DBT UST US N 2 2026-09-30 Fixed 1.62500000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 9128286X3 3028000.00000000 PA USD 3019483.75000000 0.336096467158 Long DBT UST US N 2 2026-05-31 Fixed 2.12500000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797UC9 8492000.00000000 PA USD 8415465.88000000 0.936719183124 Long DBT UST US N 2 2026-06-30 None 0.00000000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797SP3 20897000.00000000 PA USD 20820934.92000000 2.317562619618 Long DBT UST US N 2 2026-05-07 None 0.00000000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797TP2 10667000.00000000 PA USD 10546462.90000000 1.173918860038 Long DBT UST US N 2 2026-07-23 None 0.00000000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797RF6 17572000.00000000 PA USD 17397312.32000000 1.936481760764 Long DBT UST US N 2 2026-07-09 None 0.00000000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 91282CHY0 5970000.00000000 PA USD 5993320.31000000 0.667111979900 Long DBT UST US N 2 2026-09-15 Fixed 4.62500000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 9128287B0 3327000.00000000 PA USD 3311534.64000000 0.368604432256 Long DBT UST US N 2 2026-06-30 Fixed 1.87500000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797UB1 8964000.00000000 PA USD 8889598.80000000 0.989494562153 Long DBT UST US N 2 2026-06-23 None 0.00000000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797QX8 16807000.00000000 PA USD 16687338.85000000 1.857455147343 Long DBT UST US N 2 2026-06-11 None 0.00000000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 912828YD6 3129000.00000000 PA USD 3098076.69000000 0.344844588249 Long DBT UST US N 2 2026-08-31 Fixed 1.37500000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797TR8 9323000.00000000 PA USD 9284404.14000000 1.033440047863 Long DBT UST US N 2 2026-05-12 None 0.00000000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797TW7 9267000.00000000 PA USD 9142822.20000000 1.017680668517 Long DBT UST US N 2 2026-08-13 None 0.00000000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797RS8 6996000.00000000 PA USD 6887712.64000000 0.766666118042 Long DBT UST US N 2 2026-09-03 None 0.00000000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 91282CGV7 5441000.00000000 PA USD 5440149.84000000 0.605538990576 Long DBT UST US N 2 2026-04-15 Fixed 3.75000000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797TT4 9367000.00000000 PA USD 9314837.54000000 1.036827566747 Long DBT UST US N 2 2026-05-26 None 0.00000000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797RG4 15990000.00000000 PA USD 15787773.20000000 1.757325170839 Long DBT UST US N 2 2026-08-06 None 0.00000000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 91282CCJ8 7184000.00000000 PA USD 7132645.61000000 0.793929422873 Long DBT UST US N 2 2026-06-30 Fixed 0.87500000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 91282CMH1 9857000.00000000 PA USD 9887033.00000000 1.100518213412 Long DBT UST US N 2 2027-01-31 Fixed 4.12500000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 912828YU8 2857000.00000000 PA USD 2817269.84000000 0.313588188794 Long DBT UST US N 2 2026-11-30 Fixed 1.62500000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797SL2 33489000.00000000 PA USD 33462134.41000000 3.724645035356 Long DBT UST US N 2 2026-04-09 None 0.00000000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 91282CKK6 9605000.00000000 PA USD 9612879.08000000 1.070002346595 Long DBT UST US N 2 2026-04-30 Fixed 4.87500000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 91282CLB5 8828000.00000000 PA USD 8846966.43000000 0.984749185085 Long DBT UST US N 2 2026-07-31 Fixed 4.37500000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797TN7 10686000.00000000 PA USD 10572571.07000000 1.176824940822 Long DBT UST US N 2 2026-07-16 None 0.00000000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 91282CLH2 9578000.00000000 PA USD 9577251.67000000 1.066036686361 Long DBT UST US N 2 2026-08-31 Fixed 3.75000000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 91282CCZ2 7962000.00000000 PA USD 7849101.31000000 0.873677568444 Long DBT UST US N 2 2026-09-30 Fixed 0.87500000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797TL1 8738000.00000000 PA USD 8708125.75000000 0.969294933329 Long DBT UST US N 2 2026-05-05 None 0.00000000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 91282CDQ1 7811000.00000000 PA USD 7667289.79000000 0.853440264779 Long DBT UST US N 2 2026-12-31 Fixed 1.25000000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797SV0 21570000.00000000 PA USD 21460951.61000000 2.388802396428 Long DBT UST US N 2 2026-05-21 None 0.00000000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797SA6 7006000.00000000 PA USD 6877968.25000000 0.765581477314 Long DBT UST US N 2 2026-10-01 None 0.00000000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 91282CBW0 7710000.00000000 PA USD 7691327.31000000 0.856115863067 Long DBT UST US N 2 2026-04-30 Fixed 0.75000000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 912828V98 5158000.00000000 PA USD 5091510.13000000 0.566732166448 Long DBT UST US N 2 2027-02-15 Fixed 2.25000000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 91282CME8 9314000.00000000 PA USD 9347108.38000000 1.040419609697 Long DBT UST US N 2 2026-12-31 Fixed 4.25000000 N N N N N N Vanguard Cmt Funds-Vanguard Market Liquidity Fund 1I6HV0TLSTR3A4XQ6L78 N/A 974602.80000000 NS USD 974505.34000000 0.108471457082 Long STIV CORP US N 1 N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797TH0 22219000.00000000 PA USD 22189874.64000000 2.469938271132 Long DBT UST US N 2 2026-04-14 None 0.00000000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 912828YX2 3238000.00000000 PA USD 3189935.94000000 0.355069372337 Long DBT UST US N 2 2026-12-31 Fixed 1.75000000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797SK4 6922000.00000000 PA USD 6775945.80000000 0.754225435071 Long DBT UST US N 2 2026-10-29 None 0.00000000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797QD2 29102000.00000000 PA USD 29057861.92000000 3.234408774177 Long DBT UST US N 2 2026-04-16 None 0.00000000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 91282CCF6 6990000.00000000 PA USD 6954230.84000000 0.774070208898 Long DBT UST US N 2 2026-05-31 Fixed 0.75000000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 91282CLP4 9722000.00000000 PA USD 9709087.92000000 1.080711280278 Long DBT UST US N 2 2026-09-30 Fixed 3.50000000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797SU2 6864000.00000000 PA USD 6701780.83000000 0.745970187993 Long DBT UST US N 2 2026-11-27 None 0.00000000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 9128282A7 7425000.00000000 PA USD 7361771.45000000 0.819433247942 Long DBT UST US N 2 2026-08-15 Fixed 1.50000000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797TM9 6910000.00000000 PA USD 6711251.19000000 0.747024326648 Long DBT UST US N 2 2027-01-21 None 0.00000000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797TZ0 8132000.00000000 PA USD 8075889.20000000 0.898921158056 Long DBT UST US N 2 2026-06-09 None 0.00000000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 91282CMP3 8923000.00000000 PA USD 8951930.06000000 0.996432607863 Long DBT UST US N 2 2027-02-28 Fixed 4.12500000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797TS6 8230000.00000000 PA USD 8190057.11000000 0.911629102324 Long DBT UST US N 2 2026-05-19 None 0.00000000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 91282CKY6 9665000.00000000 PA USD 9685764.67000000 1.078115186847 Long DBT UST US N 2 2026-06-30 Fixed 4.62500000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797SD0 33961000.00000000 PA USD 33957603.90000000 3.779795371957 Long DBT UST US N 2 2026-04-02 None 0.00000000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 91282CEC1 5888000.00000000 PA USD 5788869.99000000 0.644354768419 Long DBT UST US N 2 2027-02-28 Fixed 1.87500000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797SW8 21733000.00000000 PA USD 21607573.44000000 2.405122762143 Long DBT UST US N 2 2026-05-28 None 0.00000000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 912810EY0 300000.00000000 PA USD 304500.00000000 0.033893666177 Long DBT UST US N 2 2026-11-15 Fixed 6.50000000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797TV9 5747000.00000000 PA USD 5564723.49000000 0.619405189944 Long DBT UST US N 2 2027-02-18 None 0.00000000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 91282CJK8 6642000.00000000 PA USD 6675210.00000000 0.743012608873 Long DBT UST US N 2 2026-11-15 Fixed 4.62500000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 91282CJC6 6320000.00000000 PA USD 6348390.64000000 0.706634591507 Long DBT UST US N 2 2026-10-15 Fixed 4.62500000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 91282CHU8 5641000.00000000 PA USD 5652678.62000000 0.629195409368 Long DBT UST US N 2 2026-08-15 Fixed 4.37500000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 91282CCP4 7420000.00000000 PA USD 7343771.08000000 0.817429640284 Long DBT UST US N 2 2026-07-31 Fixed 0.62500000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797TQ0 10700000.00000000 PA USD 10571600.00000000 1.176716851750 Long DBT UST US N 2 2026-07-30 None 0.00000000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797TE7 10591000.00000000 PA USD 10501101.57000000 1.168869724484 Long DBT UST US N 2 2026-06-25 None 0.00000000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 91282CHH7 5508000.00000000 PA USD 5512518.27000000 0.613594266136 Long DBT UST US N 2 2026-06-15 Fixed 4.12500000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 91282CHM6 5118000.00000000 PA USD 5128595.85000000 0.570860150072 Long DBT UST US N 2 2026-07-15 Fixed 4.50000000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 912828Y95 3165000.00000000 PA USD 3145589.66000000 0.350133221235 Long DBT UST US N 2 2026-07-31 Fixed 1.87500000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 91282CJT9 7042000.00000000 PA USD 7054928.69000000 0.785278810910 Long DBT UST US N 2 2027-01-15 Fixed 4.00000000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797UA3 8083000.00000000 PA USD 8021313.19000000 0.892846343395 Long DBT UST US N 2 2026-06-16 None 0.00000000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 912828U24 6880000.00000000 PA USD 6805556.27000000 0.757521354236 Long DBT UST US N 2 2026-11-15 Fixed 2.00000000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 912828YQ7 3245000.00000000 PA USD 3204564.25000000 0.356697638530 Long DBT UST US N 2 2026-10-31 Fixed 1.62500000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797SN8 22680000.00000000 PA USD 22613679.85000000 2.517111710580 Long DBT UST US N 2 2026-04-30 None 0.00000000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797TX5 9761000.00000000 PA USD 9623752.26000000 1.071212632090 Long DBT UST US N 2 2026-08-20 None 0.00000000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 912810EX2 275000.00000000 PA USD 277621.09000000 0.030901794903 Long DBT UST US N 2 2026-08-15 Fixed 6.75000000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797QN0 29008000.00000000 PA USD 28881706.56000000 3.214801053431 Long DBT UST US N 2 2026-05-14 None 0.00000000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 91282CHB0 4883000.00000000 PA USD 4881855.52000000 0.543395669358 Long DBT UST US N 2 2026-05-15 Fixed 3.62500000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797TD9 10569000.00000000 PA USD 10486332.75000000 1.167225818228 Long DBT UST US N 2 2026-06-18 None 0.00000000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797TF4 10609000.00000000 PA USD 10511126.00000000 1.169985536254 Long DBT UST US N 2 2026-07-02 None 0.00000000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 91282CKS9 8594000.00000000 PA USD 8608435.26000000 0.958198459801 Long DBT UST US N 2 2026-05-31 Fixed 4.87500000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 91282CKA8 6282000.00000000 PA USD 6301385.88000000 0.701402526994 Long DBT UST US N 2 2027-02-15 Fixed 4.12500000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 9128286S4 2602000.00000000 PA USD 2598747.50000000 0.289264631341 Long DBT UST US N 2 2026-04-30 Fixed 2.37500000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 91282CJP7 6883000.00000000 PA USD 6911768.81000000 0.769343792247 Long DBT UST US N 2 2026-12-15 Fixed 4.37500000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 91282CDG3 7971000.00000000 PA USD 7848944.06000000 0.873660065065 Long DBT UST US N 2 2026-10-31 Fixed 1.12500000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 91282CDK4 8025000.00000000 PA USD 7892712.85000000 0.878531936189 Long DBT UST US N 2 2026-11-30 Fixed 1.25000000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797TG2 22376000.00000000 PA USD 22362499.88000000 2.489153056874 Long DBT UST US N 2 2026-04-07 None 0.00000000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 91282CLS8 9469000.00000000 PA USD 9485644.70000000 1.055839983370 Long DBT UST US N 2 2026-10-31 Fixed 4.12500000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 912828R36 6511000.00000000 PA USD 6493705.16000000 0.722809441529 Long DBT UST US N 2 2026-05-15 Fixed 1.62500000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797SM0 22834000.00000000 PA USD 22783276.85000000 2.535989425203 Long DBT UST US N 2 2026-04-23 None 0.00000000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797SX6 10557000.00000000 PA USD 10489059.82000000 1.167529366340 Long DBT UST US N 2 2026-06-04 None 0.00000000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797TK3 9195000.00000000 PA USD 9169932.10000000 1.020698251113 Long DBT UST US N 2 2026-04-28 None 0.00000000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797TJ6 21943000.00000000 PA USD 21898748.25000000 2.437533211435 Long DBT UST US N 2 2026-04-21 None 0.00000000 N N N N N N United States Treasury Bill 254900HROIFWPRGM1V77 912797TY3 9512000.00000000 PA USD 9371222.40000000 1.043103723142 Long DBT UST US N 2 2026-08-27 None 0.00000000 N N N N N N United States Treasury Note/Bond 254900HROIFWPRGM1V77 912828ZB9 1170000.00000000 PA USD 1142578.13000000 0.127179513036 Long DBT UST US N 2 2027-02-28 Fixed 1.12500000 N N N N N N 2026-05-28 VANGUARD INSTITUTIONAL INDEX FUNDS Ashley Grim Ashley Grim Treasurer XXXX