William Blair Small-Mid Cap Growth Fund Class N (WSMNX)

Fund Assets	1.17B
Expense Ratio	1.228%
Min. Investment	$2,500
Turnover	57.00%
Dividend (ttm)	n/a
Dividend Yield	n/a
Dividend Growth	n/a
Payout Frequency	Annual
Ex-Dividend Date	Dec 18, 2025

Previous Close	26.63
YTD Return	9.10%
1-Year Return	10.68%
5-Year Return	22.23%
52-Week Low	23.20
52-Week High	29.11
Beta (5Y)	1.09
Holdings	82
Inception Date	Dec 29, 2003

About WSMNX

The William Blair Small-Mid Cap Growth Fund Class N is an actively managed mutual fund focused on small- and mid-cap U.S. companies poised for above-average, sustainable growth. Its investment approach emphasizes identifying businesses that demonstrate durable growth prospects and robust business models, often overlooked by short-term market participants. The fund diversifies across sectors such as technology, healthcare, industrials, and consumer defensive, with a portfolio that typically has a significant concentration in its top holdings. With a long-term orientation, the fund aims to capitalize on market inefficiencies specific to smaller and midsize firms, seeking to achieve competitive returns with managed risk levels. It appeals to investors looking to benefit from the growth potential of emerging and expanding U.S. companies, leveraging William Blair’s research-driven, quality growth investment philosophy. The fund is structured as a no-load share class and requires a minimum initial investment, offering exposure to a dynamic segment of the equity market while maintaining a focus on sustained earnings and business durability.

• Fund Family: William Blair
• Category: Mid-Cap Growth
• Performance Rating: Average
• Risk Rating: Average
• Stock Exchange: Nasdaq
• Ticker Symbol: WSMNX
• Share Class: Class N
• Index: Russell 2500 Growth TR

Performance

WSMNX had a total return of 10.68% in the past year, including dividends. Since the fund's inception, the average annual return has been 10.33%.

Other Share Classes

These are alternative share classes of the same fund, from the same provider.

Symbol	Share Class	Expense Ratio
WSMRX	Class R6	0.94%
WSMDX	Class I	0.99%

Top 10 Holdings

20.93% of assets

Name	Symbol	Weight
F5, Inc.	FFIV	2.47%
Everpure, Inc.	P	2.31%
Twist Bioscience Corporation	TWST	2.21%
Dynatrace, Inc.	DT	2.18%
Primo Brands Corporation	PRMB	2.10%
Fixed Inc Clearing Corp.Repo	n/a	2.07%
Manhattan Associates, Inc.	MANH	2.03%
Mueller Industries, Inc.	MLI	1.98%
Guardant Health, Inc.	GH	1.83%
BorgWarner Inc.	BWA	1.75%

Dividend History

Ex-Dividend	Amount	Pay Date
Dec 18, 2025	$0.77044	Dec 19, 2025
Dec 19, 2024	$3.49015	Dec 20, 2024
Dec 14, 2023	$2.23334	Dec 15, 2023
Dec 15, 2022	$0.86499	Dec 16, 2022
Dec 16, 2021	$3.23056	Dec 17, 2021
Dec 17, 2020	$0.58343	Dec 18, 2020

Data Sources: Tiingo, Financial Modeling Prep, and more

Historical data is provided by Tiingo. Delayed stock pricing data is provided by Financial Modeling Prep. Several fund data points are also provided by Finnhub.

Last checked:

Oct 16, 2026

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