NPORT-P false 0001026144 XXXXXXXX S000003118 C000099169 C000008451 C000008452 C000201957 BlackRock Index Funds, Inc. 811-07899 0001026144 549300R0LV8YE1DSQ620 100 Bellevue Parkway Wilmington 19809 800-441-7762 iShares Russell 2000 Small-Cap Index Fund S000003118 549300URA4LL162MRE56 2025-12-31 2025-03-31 N 2553591330.09 856906.99 2552734423.10 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 0.00000000 N BlackRock Index Funds, Inc. 549300R0LV8YE1DSQ620 000000000 104634112.71000000 NS USD 2550080860.94000000 99.89605020655 Long EC RF US N N/A N N N 2025-04-29 BlackRock Index Funds, Inc. Chuck Pulsfort Chuck Pulsfort Assistant Treasurer XXXX