- Sector
- Financial Services
- Industry
- Asset Management
- Address
- FORT WORTH TX 76155 Jersey City NJ United States of America 07311
- IPO Date
- Feb 2, 2006
- Business
- American Beacon Stephens Mid-Cap Growth Fund Investor Class (STMGX) is an open-end mutual fund that seeks long-term growth of capital by investing primarily in mid-capitalization growth stocks, with at least 80% of its net assets allocated to companies in the Russell Midcap Growth Index style, including sectors such as information technology (25.7%), industrials (21.5%), health care (14.5%), and consumer discretionary (12.3%); the fund offers multiple share classes including Investor (STMGX, CUSIP 024524191, inception February 1, 2006, net expense ratio 1.16%), R5 (SFMIX), Y (SMFYX), A, C, and R6 classes, with total fund assets of approximately $754 million as of late 2025 and portfolio managers from sub-advisor Stephens Investment Management Group, LLC including Ryan Edward Crane (CIO, since inception), Samuel M. Chase (since 2011), and John R. Keller (since 2019).
The fund is managed by American Beacon Advisors, Inc., headquartered in Irving, Texas, with sub-advisory services provided by Stephens Investment Management Group, LLC (firm inception September 2005, based in Little Rock, Arkansas), which specializes in equity strategies targeting small- and mid-cap growth companies characterized by high earnings growth potential in inefficient markets.
As of September 30, 2025, the portfolio holds 93 equity positions (99% allocation) with top holdings including AeroVironment Inc. (2.2%), Axon Enterprise Inc. (2.1%), Electronic Arts Inc. (2.0%), Robinhood Markets Inc. Class A (1.9%), and FirstCash Holdings Inc. (1.9%), weighted average market cap of $33 billion, forward P/E of 33.4, and P/B of 5.7; it benchmarks against the Russell Midcap Growth Index.
Recent operational updates include American Beacon Advisors contractually agreeing to reduce and/or reimburse certain fees and expenses through December 31, 2025, for STMGX and other share classes, maintaining the net expense ratio; fee waivers were also applied across classes in 2023 and 2024 to enhance investor returns amid market volatility.
No major acquisitions, partnerships, name changes, or strategic shifts specific to the fund or its sub-advisor were reported in the last 1-2 years, with Stephens Investment Management Group focusing on organic portfolio adjustments such as new positions in Bloom Energy Corp. ($41.8 million) and Viking Holdings Ltd. ($32.4 million) per Q3 2025 13F filings.