William Blair International Growth Fund Class I (BIGIX)

Fund Assets	1.09B
Expense Ratio	0.90%
Min. Investment	$500,000
Turnover	77.00%
Dividend (ttm)	0.41
Dividend Yield	1.35%
Dividend Growth	-79.73%
Payout Frequency	Annual
Ex-Dividend Date	Dec 18, 2025

Previous Close	30.81
YTD Return	13.61%
1-Year Return	18.27%
5-Year Return	9.52%
52-Week Low	26.16
52-Week High	32.46
Beta (5Y)	0.91
Holdings	176
Inception Date	Oct 1, 1999

About BIGIX

William Blair International Growth Fund Class I is an actively managed mutual fund focused on long-term capital appreciation by investing primarily in the equity securities of companies located outside the United States. The fund seeks to identify firms exhibiting superior growth potential, strong profitability, and high quality standards, spanning all market capitalizations. Typically, at least 80% of its assets are allocated to a diversified portfolio of international stocks, with geographical exposure spread across at least six different countries to enhance diversification and reduce country-specific risk. The fund maintains structural exposure to both emerging markets and developed economies, and often overweights sectors such as financial services and industrials. It employs a disciplined investment approach that blends deep fundamental research with systematic analysis to uncover attractive growth opportunities. With a relatively high minimum initial investment, the fund is tailored for institutional and sophisticated investors aiming for exposure to international large-cap growth equities. Managed since 1999, William Blair International Growth Fund Class I plays a significant role for investors seeking to diversify beyond U.S. markets, offering a broad, research-driven gateway to global growth trends.

• Fund Family: William Blair
• Category: Foreign Large Growth
• Performance Rating: Average
• Risk Rating: Average
• Stock Exchange: NASDAQ
• Ticker Symbol: BIGIX
• Share Class: Class I
• Index: MSCI ACWI EX US IMI NR

Performance

BIGIX had a total return of 18.27% in the past year, including dividends. Since the fund's inception, the average annual return has been 7.23%.

Other Share Classes

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

Symbol	Share Class	Expense Ratio
WBIRX	Class R6	0.85%
WBIGX	Class N	1.15%

Top 10 Holdings

22.60% of assets

Name	Symbol	Weight
Taiwan Semiconductor Manufacturing Company Limited	TSM	5.31%
ASML Holding N.V.	ASML	3.28%
SK hynix Inc.	000660	3.02%
Samsung Electronics Co., Ltd.	005930	2.98%
AstraZeneca PLC	AZN	1.59%
Sumitomo Mitsui Financial Group, Inc.	8316	1.34%
Fixed Inc Clearing Corp.Repo	n/a	1.34%
Safran SA	SAF	1.29%
Roche Holding AG	n/a	1.27%
Tokio Marine Holdings, Inc.	8766	1.17%

Dividend History

Ex-Dividend	Amount	Pay Date
Dec 18, 2025	$0.41484	Dec 19, 2025
Dec 19, 2024	$2.04666	Dec 20, 2024
Dec 14, 2023	$1.0094	Dec 15, 2023
Dec 15, 2022	$2.01914	Dec 16, 2022
Dec 16, 2021	$4.41292	Dec 17, 2021
Dec 17, 2020	$0.44106	Dec 18, 2020

Data Sources: Tiingo, Twelve Data, and more

Historical data is provided by Tiingo. Delayed stock pricing data is provided by Twelve Data. Several fund data points are also provided by Finnhub.

Last checked:

Aug 27, 2026

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