# iShares S&P 500 Index Fund

iShares S&P 500 Index Fund is a registered fund series of BlackRock Funds III (series S000004272). Net assets $51.3B as of 2026-03-31. Index fund.

## Profile

- Series ID: S000004272
- Registrant: BlackRock Funds III
- LEI: 54930044UW5DQ1DX0D35
- Net assets: $51.3B
- Total assets: $51.5B
- As of: 2026-03-31
- Type: Index

## Advisers

- [BlackRock Fund Advisors (Advisor)](https://search.stillhousedata.com/firm/105247)

## Top holdings (1 reported)

| Holding | Ticker | Value | % of fund |
| --- | --- | --- | --- |
| MASTER INVESTMENT PORTFOLIO | — | $51.3B | 10002.96% |

## Net asset history

| Report date | Net assets |
| --- | --- |
| 2026-03-31 | $51.3B |
| 2025-12-31 | $53.6B |
| 2025-09-30 | $51.9B |
| 2025-06-30 | $49.4B |
| 2025-03-31 | $44.5B |
| 2024-12-31 | $46.0B |
| 2024-09-30 | $44.5B |
| 2024-06-30 | $41.6B |

## More

- [Registrant: BlackRock Funds III](https://search.stillhousedata.com/registrant/893818)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/fund/S000004272.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.