# William Blair Small-Mid Cap Growth Fund

William Blair Small-Mid Cap Growth Fund is a registered fund series of WILLIAM BLAIR FUNDS (series S000008603). Net assets $1.1B as of 2026-03-31.

## Profile

- Series ID: S000008603
- Registrant: WILLIAM BLAIR FUNDS
- LEI: 549300OZL0V7MPFUUE44
- Net assets: $1.1B
- Total assets: $1.1B
- As of: 2026-03-31

## Advisers

- [William Blair Investment Management, LLC (Advisor)](https://search.stillhousedata.com/firm/173961)

## Top holdings (84 reported)

_Showing 15 of 84 holdings by value._

| Holding | Ticker | Value | % of fund |
| --- | --- | --- | --- |
| [Primo Brands Corp](https://search.stillhousedata.com/security/741623102) | — | $25.0M | 222.13% |
| [Twist Bioscience Corp](https://search.stillhousedata.com/security/90184D100) | — | $24.3M | 216.10% |
| [Lattice Semiconductor Corp](https://search.stillhousedata.com/security/518415104) | — | $23.8M | 211.45% |
| [BWX Technologies Inc](https://search.stillhousedata.com/security/05605H100) | — | $23.1M | 204.94% |
| [F5 Inc](https://search.stillhousedata.com/security/315616102) | — | $22.6M | 201.04% |
| [Mueller Industries Inc](https://search.stillhousedata.com/security/624756102) | — | $22.6M | 200.93% |
| [Akamai Technologies Inc](https://search.stillhousedata.com/security/00971T101) | — | $22.6M | 200.73% |
| [Nextpower Inc](https://search.stillhousedata.com/security/65290E101) | — | $22.3M | 197.95% |
| [Onto Innovation Inc](https://search.stillhousedata.com/security/683344105) | — | $22.3M | 197.90% |
| [Insmed Inc](https://search.stillhousedata.com/security/457669307) | — | $21.7M | 192.49% |
| [Talen Energy Corp](https://search.stillhousedata.com/security/87422Q109) | — | $21.2M | 188.53% |
| [Madrigal Pharmaceuticals Inc](https://search.stillhousedata.com/security/558868105) | — | $20.2M | 179.44% |
| [Everpure Inc](https://search.stillhousedata.com/security/74624M102) | — | $20.2M | 179.37% |
| [Curtiss-Wright Corp](https://search.stillhousedata.com/security/231561101) | — | $19.8M | 176.02% |
| Everest Group Ltd | — | $19.3M | 171.64% |

## Net asset history

| Report date | Net assets |
| --- | --- |
| 2026-03-31 | $1.1B |
| 2025-12-31 | $1.3B |
| 2025-09-30 | $1.4B |
| 2025-06-30 | $1.4B |
| 2025-03-31 | $1.5B |
| 2024-12-31 | $1.9B |
| 2024-09-30 | $2.0B |
| 2024-06-30 | $1.9B |

## More

- [Registrant: WILLIAM BLAIR FUNDS](https://search.stillhousedata.com/registrant/822632)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/fund/S000008603.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.