Fund Notice Effective December 8, 2025, the subadviser of AMG GW&K Small Cap Growth Fund (formerly AMG Montrusco Bolton Large Cap Growth Fund) (the “Fund”) changed from Montrusco Bolton Investments, Inc. to GW&K Investment Management, LLC. Also effective December 8, 2025, the Fund changed its name to AMG GW&K Small Cap Growth Fund, changed its principal investment strategies and principal risks, reduced its management fee and expense cap, and changed the maximum authorized shareholder servicing fee rate payable by Class I shares. For more information regarding these and other changes to the Fund, please see the Fund’s Prospectus. Fund Overview Fund Overview Call Us Advisors: 800.368.4410 Investors: 800.548.4539 Share Class Z N I Z NAV | as of 02/27/2026 $10.89 -$0.12 (-1.09%) Documents Summary Prospectus Prospectus SAI Annual Report - Class N Semi-Annual Report - Class N Annual Report - Class I Semi-Annual Report - Class I Annual Financial Statements and other information Semi-Annual Financial Statements and other information Q1 Holdings Q3 Holdings Distributions All Holdings View All Documents Objective The Fund seeks to provide long-term capital appreciation by investing in small cap stocks exhibiting consistent, sustainable earnings growth. Why Consider Provides investors with exposure to a portfolio of small cap growth companies Manages risk with a sell discipline and exposure limits for each company and diversification of sector and growth profiles embedded in the portfolio construction process Employs a fundamental, research-oriented investment process that is built on the belief that a company’s ability to generate consistent, long-term sustainable earnings growth can drive enhanced stock price performance over time Investment Style AMG GW&K Small Cap Growth Fund has an Equity Income Objective, seeking to achieve income and capital appreciation. Large Mid Small Value Blend Growth Equity Objective AMG GW&K Small Cap Growth Fund is categorized as Small-Growth. It invests in small-cap companies with high risk. Morningstar Ratings Risk-adjusted returns as of 01/31/2026 Overall Rating — 3 Years — 5 Years — 10 Years — Category Large Growth Read Important Investment Disclosures Daniel L. Miller, CFA PARTNER, DIRECTOR OF EQUITIES Dan is a partner of the firm and brings over four decades of investment management experience to GW&K. As director of our equity department, he is responsible for overseeing all aspects of our equity investment teams including portfolio management, research, and trading. He is a member of the firm’s Management, Investment, and ESG Committees. Dan has worked with various companies in the Boston area as an investment and financial consultant. Prior to joining GW&K, he spent 21 years at Putnam Investments in Boston, where he was chief investment officer for the specialty growth group and oversaw a team of twenty and up to $100 billion in assets under management. He was also a portfolio management team member of several small and mid cap growth funds, the lead manager for the Putnam New Opportunities Fund, and a member of Putnam’s management committee and partners group. He began his career as an analyst at Morgan Stanley. Dan graduated from the University of California, Berkeley, with highest honors, and received his MBA from Stanford University Graduate School of Business. He is a CFA® charterholder and is a member of the CFA Institute and the CFA Society Boston. Dan serves on the board of trustees for The Rashi School in Dedham, Massachusetts. Joseph C. Craigen, CFA PARTNER, PORTFOLIO MANAGER Joe serves as a portfolio manager for GW&K’s Small Cap Growth Strategy and is a member of the firm’s Investment Committee. He is also a research analyst focused on our Small Cap Core and Small/Mid Cap Core Strategies. Joe is a seasoned investor with expertise in a number of industries including extensive experience in Information Technology. Prior to joining GW&K in 2008, Joe held research analyst positions at Citizens Funds and Needham & Company, and was a research associate at Tucker Anthony. Joe received an AB in Economics from Harvard College. He has earned the CFA® designation and is a member of the CFA Institute and the CFA Society Boston. About the Affiliate About GW&K Investment Management GW&K Investment Management is a dynamic investment management firm that offers asset allocation, active equity, and fixed income investment solutions to help meet the needs of a diverse client base. GW&K’s founding principles of applying rigorous fundamental research, focusing on quality, and maintaining a long-term view still guide its investment process today. Learn More About GW&K Investment Management's Approach FOUNDED 1974 AMG AFFILIATE SINCE 2008 HEADQUARTERS Boston, MA Portfolio Managers Daniel L. Miller, CFA PARTNER, DIRECTOR OF EQUITIES Read full bio Joseph C. Craigen, CFA PARTNER, PORTFOLIO MANAGER Read full bio Investment Approach Investment Approach AMG GW&K Small Cap Growth Fund The Fund primarily invests in small cap growth companies. The Fund identifies new investments based on five attributes: Company Management: The Fund seeks companies with experienced, tenured, high-quality management Growth Profile: The Fund favors companies with business models that have typically delivered consistent long-term growth Market Positioning: The Fund targets leading companies in attractive and defensible niche markets Financial Strength: The Fund invests in companies with strong financial characteristics Valuation: The Fund will seek attractive valuation relative to industry, peers, and own company history Additional Fund Highlight Risk management parameters, including exposure limits for each company and diversification of sector and growth profiles, are embedded in the portfolio construction process. 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