BOSTON BEER COMPANY INC-A (SAM) Stock Institutional Trading Activity


BOSTON BEER COMPANY INC-A (SAM) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q4 2025), investors with some of the largest reported share count changes include Longleaf Partners, Renaissance Technologies LLC, Sequoia Financial Advisors, Durable Capital Partners, and Egerton Capital UK. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.

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Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q3 2020Egerton Capital UKBuy122,460122,460$108,176
Q3 2020Renaissance Technologies LLCSell-21,883462,117$408,216
Q3 2020Durable Capital PartnersBuy127,684494,770$437,060
Q2 2020Durable Capital PartnersBuy367,086367,086$196,997
Q2 2020Renaissance Technologies LLCSell-72,400484,000$259,739
Q1 2020Renaissance Technologies LLCBuy65,641556,400$204,510
Q4 2019Renaissance Technologies LLCBuy75,759490,759$185,433
Q3 2019Renaissance Technologies LLCBuy91,500415,000$151,093
Q2 2019Renaissance Technologies LLCBuy112,700323,500$122,205
Q1 2019Renaissance Technologies LLCBuy108,200210,800$62,129
Q4 2018Renaissance Technologies LLCBuy42,941102,600$24,710
Q3 2018Renaissance Technologies LLCBuy6,25959,659$17,152
Q1 2018Renaissance Technologies LLCBuy11,60053,400$10,095
Q4 2017Renaissance Technologies LLCBuy31,20041,800$7,988
Q3 2017Jensen Investment ManagementSell-1,7001,710$267
Q3 2017Renaissance Technologies LLCBuy8,00010,600$1,656
Q2 2017Jensen Investment ManagementBuy6603,410$451
Q2 2017Renaissance Technologies LLCSell-29,6002,600$344
Q1 2017Jensen Investment ManagementBuy3502,750$398
Q1 2017Renaissance Technologies LLCBuy3,70032,200$4,658
Q4 2016Jensen Investment ManagementSell-1002,400$408
Q3 2016Jensen Investment ManagementSell-2402,500$388
Q2 2016Jensen Investment ManagementBuy6302,740$469
Q1 2016Jensen Investment ManagementBuy2402,110$390
Q1 2016Renaissance Technologies LLCSell-14,04728,500$5,274
Q4 2015Jensen Investment ManagementBuy1,8701,870$378
Q4 2015Renaissance Technologies LLCSell-26,77142,547$8,591
Q3 2015Renaissance Technologies LLCSell-56,07669,318$14,599
Q2 2015Renaissance Technologies LLCSell-20,906125,394$29,090
Q1 2015Renaissance Technologies LLCBuy25,400146,300$39,121

Frequently asked questions about SAM activity

  • Which institutional owners are buying SAM?

    Institutional owners buying SAM include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in SAM activity?

    "Buy" means an investor increased their reported position in SAM compared to the prior reporting period. This reflects growing exposure to BOSTON BEER COMPANY INC-A (SAM) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in SAM increasing?

    Institutional interest in SAM can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.