# S&P 500 Index Master Portfolio

S&P 500 Index Master Portfolio is a registered fund series of Master Investment Portfolio (series S000004285). Net assets $51.9B as of 2026-03-31. Index fund.

## Profile

- Series ID: S000004285
- Registrant: Master Investment Portfolio
- LEI: 5493007HYX7NC9R77G02
- Net assets: $51.9B
- Total assets: $52.2B
- As of: 2026-03-31
- Type: Index

## Advisers

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

## Top holdings (200 reported)

_Showing 15 of 200 holdings by value._

| Holding | Ticker | Value | % of fund |
| --- | --- | --- | --- |
| [NVIDIA Corp](https://search.stillhousedata.com/security/67066G104) | — | $3.9B | 744.03% |
| [Apple Inc](https://search.stillhousedata.com/security/037833100) | — | $3.4B | 654.14% |
| [Microsoft Corp](https://search.stillhousedata.com/security/594918104) | — | $2.5B | 482.58% |
| [Amazon.com Inc](https://search.stillhousedata.com/security/023135106) | — | $1.9B | 357.19% |
| [Alphabet Inc](https://search.stillhousedata.com/security/02079K305) | — | $1.5B | 293.93% |
| [Broadcom Inc](https://search.stillhousedata.com/security/11135F101) | — | $1.3B | 257.25% |
| [Alphabet Inc](https://search.stillhousedata.com/security/02079K107) | — | $1.2B | 235.53% |
| [Meta Platforms Inc](https://search.stillhousedata.com/security/30303M102) | — | $1.1B | 219.31% |
| [Tesla Inc](https://search.stillhousedata.com/security/88160R101) | — | $952.8M | 183.56% |
| [Berkshire Hathaway Inc](https://search.stillhousedata.com/security/084670702) | — | $800.8M | 154.27% |
| [JPMorgan Chase & Co](https://search.stillhousedata.com/security/46625H100) | — | $722.8M | 139.24% |
| [Eli Lilly & Co](https://search.stillhousedata.com/security/532457108) | — | $664.2M | 127.96% |
| [Exxon Mobil Corp](https://search.stillhousedata.com/security/30231G102) | — | $646.1M | 124.48% |
| [Johnson & Johnson](https://search.stillhousedata.com/security/478160104) | — | $536.8M | 103.42% |
| [iShares Core S&P 500 ETF](https://search.stillhousedata.com/security/464287200) | — | $504.5M | 97.18% |

## Net asset history

| Report date | Net assets |
| --- | --- |
| 2026-03-31 | $51.9B |
| 2025-12-31 | $54.1B |
| 2025-09-30 | $52.6B |
| 2025-06-30 | $50.1B |
| 2025-03-31 | $45.1B |
| 2024-12-31 | $46.5B |
| 2024-09-30 | $45.2B |
| 2024-06-30 | $42.3B |

## More

- [Registrant: Master Investment Portfolio](https://search.stillhousedata.com/registrant/915092)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/fund/S000004285.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.