Boston Beer Co Inc (SAM) Institutional Ownership

Ownership Summary

Boston Beer Co Inc (NYSE:SAM) has 334 institutional investors that have filed 13F reports for the period ending December 2025.

• These investors held 69.8% of outstanding shares in December 2025, down from 74.0% in September 2025.
• They increased total shares held in Boston Beer by 1.22% from the prior quarter, while the number of investors in SAM decreased 1.76% year over year.
• Activity in SAM broke down as 126 buyers, 152 sellers, and 56 unchanged among 334 total holders.
• The aggregate institutional position in Boston Beer amounted to 7.55Mn shares as of December 2025, up by 91.02K shares quarter on quarter, and down 20.08K shares year over year.
• As of December 31, 2025, BlackRock, Inc. held the largest stake in Boston Beer with 770.25K shares, accounting for 7.11% of total shares outstanding.
• The most significant purchases of SAM for the quarter ending December 2025 came from VANGUARD PORTFOLIO MANAGEMENT LLC (634.47K), VANGUARD CAPITAL MANAGEMENT LLC (340.9K), AQR CAPITAL MANAGEMENT LLC (211.76K), Quantinno Capital Management LP (140.25K), AMERICAN CENTURY COMPANIES INC (96.48K).
• The largest sales of SAM for the quarter ending December 2025 came from FMR LLC (165.51K), CITADEL ADVISORS LLC (79.73K), Gotham Asset Management, LLC (78.59K), VOLORIDGE INVESTMENT MANAGEMENT, LLC (56.86K), Monaco Asset Management SAM (51.93K).
• Business Quant data shows the 10 biggest positions in Boston Beer as of December 2025 are held by BlackRock, Inc. (770.25K), AQR CAPITAL MANAGEMENT LLC (651.98K), VANGUARD PORTFOLIO MANAGEMENT LLC (634.47K), VANGUARD CAPITAL MANAGEMENT LLC (340.9K), AMERICAN CENTURY COMPANIES INC (288.08K), DIMENSIONAL FUND ADVISORS LP (273.61K), State Street Corp (255.2K), ARROWSTREET CAPITAL, LIMITED PARTNERSHIP (245.25K), Quantinno Capital Management LP (230.59K), UBS Group AG (218.6K).