# iShares Russell Small/Mid-Cap Index Fund

iShares Russell Small/Mid-Cap Index Fund is a registered fund series of BlackRock Funds (series S000050373). Net assets $1.2B as of 2026-04-30. Index fund.

## Profile

- Series ID: S000050373
- Registrant: BlackRock Funds
- LEI: 549300KWDIYW68SW1U39
- Net assets: $1.2B
- Total assets: $1.4B
- 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) | — | $92.5M | 743.14% |
| [Sandisk Corp/DE](https://search.stillhousedata.com/security/80004C200) | — | $24.9M | 199.82% |
| [Ciena Corp](https://search.stillhousedata.com/security/171779309) | — | $11.8M | 94.81% |
| [iShares Russell 2000 ETF](https://search.stillhousedata.com/security/464287655) | — | $10.3M | 82.78% |
| [Comfort Systems USA Inc](https://search.stillhousedata.com/security/199908104) | — | $10.1M | 81.46% |
| [Lumentum Holdings Inc](https://search.stillhousedata.com/security/55024U109) | — | $10.1M | 81.04% |
| [Bloom Energy Corp](https://search.stillhousedata.com/security/093712107) | — | $9.7M | 78.30% |
| [Coherent Corp](https://search.stillhousedata.com/security/19247G107) | — | $8.9M | 71.26% |
| [BLACKROCK CASH FUNDS TREASURY SL AGENCY SHARES](https://search.stillhousedata.com/security/066922477) | — | $6.7M | 53.73% |
| [Rocket Lab Corp](https://search.stillhousedata.com/security/773121108) | — | $6.4M | 51.50% |
| [EMCOR Group Inc](https://search.stillhousedata.com/security/29084Q100) | — | $6.3M | 50.29% |
| [iShares Russell Mid-Cap ETF](https://search.stillhousedata.com/security/464287499) | — | $6.1M | 49.18% |
| [Jabil Inc](https://search.stillhousedata.com/security/466313103) | — | $5.6M | 44.70% |
| Flex Ltd | — | $5.4M | 43.09% |
| TechnipFMC PLC | — | $4.8M | 38.45% |

## Net asset history

| Report date | Net assets |
| --- | --- |
| 2026-04-30 | $1.2B |
| 2026-01-31 | $1.2B |
| 2025-10-31 | $1.1B |
| 2025-07-31 | $993.8M |
| 2025-04-30 | $796.8M |
| 2025-01-31 | $850.2M |
| 2024-10-31 | $619.8M |
| 2024-07-31 | $599.5M |

## More

- [Registrant: BlackRock Funds](https://search.stillhousedata.com/registrant/844779)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/fund/S000050373.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.