# iShares Russell Mid-Cap Index Fund

iShares Russell Mid-Cap Index Fund is a registered fund series of BlackRock Funds (series S000049319). Net assets $2.4B as of 2026-04-30. Index fund.

## Profile

- Series ID: S000049319
- Registrant: BlackRock Funds
- LEI: 549300SBLRFF3BMZRA53
- Net assets: $2.4B
- Total assets: $2.5B
- As of: 2026-04-30
- Type: Index

## Advisers

- [BlackRock Fund Advisors (Subadvisor)](https://search.stillhousedata.com/firm/105247)
- [BlackRock Advisors, LLC (Advisor)](https://search.stillhousedata.com/firm/106614)

## Top holdings (200 reported)

_Showing 15 of 200 holdings by value._

| Holding | Ticker | Value | % of fund |
| --- | --- | --- | --- |
| [BlackRock Funds III](https://search.stillhousedata.com/security/066922519) | — | $37.7M | 158.00% |
| [iShares Russell Mid-Cap ETF](https://search.stillhousedata.com/security/464287499) | — | $28.7M | 120.26% |
| [Sandisk Corp/DE](https://search.stillhousedata.com/security/80004C200) | — | $27.3M | 114.06% |
| [Western Digital Corp](https://search.stillhousedata.com/security/958102105) | — | $25.7M | 107.52% |
| [Corning Inc](https://search.stillhousedata.com/security/219350105) | — | $22.3M | 93.26% |
| [Vertiv Holdings Co](https://search.stillhousedata.com/security/92537N108) | — | $21.7M | 90.89% |
| [Quanta Services Inc](https://search.stillhousedata.com/security/74762E102) | — | $18.6M | 77.95% |
| [BLACKROCK CASH FUNDS TREASURY SL AGENCY SHARES](https://search.stillhousedata.com/security/066922477) | — | $17.3M | 72.23% |
| [Howmet Aerospace Inc](https://search.stillhousedata.com/security/443201108) | — | $16.9M | 70.88% |
| [Bank of New York Mellon Corp/The](https://search.stillhousedata.com/security/064058100) | — | $16.1M | 67.30% |
| [Cummins Inc](https://search.stillhousedata.com/security/231021106) | — | $16.0M | 67.16% |
| [Valero Energy Corp](https://search.stillhousedata.com/security/91913Y100) | — | $13.3M | 55.84% |
| [Marathon Petroleum Corp](https://search.stillhousedata.com/security/56585A102) | — | $13.1M | 54.75% |
| [Monolithic Power Systems Inc](https://search.stillhousedata.com/security/609839105) | — | $12.9M | 54.13% |
| [Ciena Corp](https://search.stillhousedata.com/security/171779309) | — | $12.9M | 53.91% |

## Net asset history

| Report date | Net assets |
| --- | --- |
| 2026-04-30 | $2.4B |
| 2026-01-31 | $2.3B |
| 2025-10-31 | $2.2B |
| 2025-07-31 | $2.2B |
| 2025-04-30 | $2.0B |
| 2025-01-31 | $2.1B |
| 2024-10-31 | $2.0B |
| 2024-07-31 | $2.0B |

## More

- [Registrant: BlackRock Funds](https://search.stillhousedata.com/registrant/844779)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/fund/S000049319.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.