Boston Beer Company Inc. Class ASAM
13F holders, Q1 2026 (March 31)370holders +22
68new positions
44sold out
8famous investors
$230.33avg. 13F price*
At the end of Q1 2026, 370 institutions reported holding Boston Beer Company Inc. Class A (SAM) in their 13F filings, up 22 from Q4 2025. 68 opened new positions and 44 sold out. The largest holders were BlackRock, Inc. ($177.5M), AQR Capital Management ($150.2M) and Vanguard Portfolio Management LLC ($146.2M). 8 famous investors held it, including Joel Greenblatt (0.1% of Gotham Asset Management's portfolio), Cliff Asness (0.1% of AQR Capital Management's portfolio) and Mario Gabelli (0.1% of GAMCO Investors's portfolio).
- Company
- Boston Beer Company Inc. Class A
- CUSIP
- 100557107
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 68 | $32.6M |
| Exits | 44 | $24.8M |
All 13F filers, Q4 2025 → Q1 2026: 1,193,254 shares bought and 891,492 shares sold, net +301,762 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 370 holders
| BlackRock, Inc. | 0.00% | Add +6.2% | 770,250 | $177.5M |
| AQR Capital Management | 0.07% | Add +48.1% | 651,984 | $150.2M |
| Vanguard Portfolio Management LLC | 0.01% | — | 634,469 | $146.2M |
| Vanguard Capital Management LLC | 0.00% | — | 340,903 | $78.5M |
| American Century Companies Inc. | 0.03% | Add +50.4% | 288,084 | $66.4M |
| Dimensional Fund Advisors LP | 0.01% | Add +6.0% | 273,612 | $63.0M |
| State Street Corp. | 0.00% | Add +0.3% | 255,195 | $58.8M |
| Arrowstreet Capital, Limited Partnership | 0.03% | Reduce -9.7% | 245,249 | $56.5M |
| Quantinno Capital Management LP | 0.09% | Add +155.2% | 230,587 | $53.1M |
| UBS Group AG | 0.01% | Add +0.9% | 218,604 | $50.4M |
| FMR LLC | 0.00% | Reduce -45.9% | 195,365 | $45.0M |
| Gotham Asset Management | 0.12% | Reduce -31.6% | 170,318 | $39.2M |
| Global Alpha Capital Management Ltd. | 2.04% | Add +19.9% | 147,525 | $34.0M |
| Goldman Sachs Group Inc. | 0.00% | Add +160.2% | 144,960 | $33.4M |
| Geode Capital Management, LLC | 0.00% | Add +2.1% | 142,113 | $32.8M |
| Morgan Stanley | 0.00% | Add +17.7% | 134,511 | $31.0M |
| Southeastern Asset Management Inc. | 1.34% | Reduce -20.0% | 118,401 | $27.3M |
| Invesco Ltd. | 0.00% | Reduce -1.3% | 115,612 | $26.6M |
| Qube Research & Technologies Ltd | 0.04% | Reduce -16.2% | 111,324 | $25.6M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +8.3% | 106,981 | $24.6M |
| Millennium Management | 0.02% | Add +69.8% | 96,615 | $22.3M |
| Renaissance Technologies | 0.03% | Add +13.4% | 93,779 | $21.6M |
| Ameriprise Financial Inc. | 0.00% | Add +0.7% | 91,529 | $21.1M |
| Woodson Capital Management, LP | 3.35% | Reduce -10.0% | 90,000 | $20.7M |
| Northern Trust Corp. | 0.00% | Add +5.5% | 78,992 | $18.2M |
| T. Rowe Price Investment Management, Inc. | 0.01% | Add +327183.3% | 78,548 | $18.1M |
| Man Group plc | 0.04% | Add +8.7% | 77,523 | $17.9M |
| Southernsun Asset Management, LLC | 2.50% | Reduce -0.9% | 74,816 | $17.2M |
| Calamos Advisors LLC | 0.08% | Add +2.1% | 66,749 | $15.4M |
| Loomis Sayles & Co. L P | 0.02% | Reduce -2.4% | 63,481 | $14.6M |
| Bank of New York Mellon Corp | 0.00% | Reduce -5.5% | 56,995 | $13.1M |
| Franklin Resources Inc. | 0.00% | Reduce -15.1% | 55,647 | $12.8M |
| Citadel Advisors | 0.01% | Reduce -60.0% | 53,214 | $12.3M |
| First Trust Advisors LP | 0.01% | Add +34.8% | 51,675 | $11.9M |
| Vanguard Fiduciary Trust Co. | 0.00% | — | 47,670 | $11.0M |
| D. E. Shaw & Co. | 0.01% | Reduce -13.3% | 46,607 | $10.7M |
| Marshall Wace, LLP | 0.01% | Add +69.6% | 45,645 | $10.5M |
| Corient Private Wealth LP | 0.01% | Add +1447.2% | 45,427 | $10.4M |
| Prescott General Partners LLC | 0.76% | New | 45,000 | $10.4M |
| Bank of America Corp. | 0.00% | Reduce -5.1% | 44,352 | $10.2M |
| Crawford Fund Management, LLC | 2.96% | Reduce -36.0% | 39,381 | $9.1M |
| Pacer Advisors, Inc. | 0.02% | Reduce -10.3% | 37,529 | $8.6M |
| Ieq Capital, LLC | 0.04% | Add +52.4% | 36,928 | $8.5M |
| JPMorgan Chase & Co. | 0.00% | Add +47.1% | 33,853 | $7.8M |
| WINTON GROUP Ltd | 0.26% | Add +11.0% | 32,659 | $7.5M |
| Trexquant Investment LP | 0.05% | Reduce -46.9% | 29,788 | $6.9M |
| GAMCO Investors | 0.06% | Reduce -0.0% | 28,060 | $6.5M |
| Nomura Holdings Inc. | 0.05% | Reduce -41.6% | 27,193 | $6.3M |
| Creative Planning | 0.00% | Add +122.4% | 26,457 | $6.1M |
| Gabelli Funds LLC | 0.04% | Reduce -2.2% | 26,400 | $6.1M |
| Susquehanna International Group, LLP | 0.01% | Add +40.9% | 26,103 | $6.0M |
| Algert Global LLC | 0.09% | Reduce -0.5% | 24,576 | $5.7M |
| Acadian Asset Management LLC | 0.01% | Reduce -15.4% | 24,558 | $5.7M |
| Rhumbline Advisers | 0.00% | Add +0.8% | 23,257 | $5.4M |
| Royal Bank of Canada | 0.00% | Add +136.5% | 19,081 | $4.4M |
| HRT Financial LP | 0.01% | Add +181.5% | 19,074 | $4.4M |
| Nuveen, LLC | 0.00% | Add +6.7% | 18,600 | $4.3M |
| Squarepoint Ops LLC | 0.01% | Add +404.8% | 17,974 | $4.1M |
| Principal Financial Group Inc. | 0.00% | Add +3.9% | 17,191 | $4.0M |
| Ontario Teachers Pension Plan Board | 0.12% | Reduce -44.3% | 17,092 | $3.9M |
| Swiss National Bank | 0.00% | Reduce -2.4% | 16,100 | $3.7M |
| Cerity Partners LLC | 0.01% | Add +91.0% | 16,093 | $3.7M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Add +1.3% | 15,904 | $3.7M |
| Savoir Faire Capital Management, L.P. | 2.11% | Reduce -30.4% | 15,137 | $3.5M |
| Cwm, LLC | 0.01% | Add +35.5% | 12,368 | $2.8M |
| Mariner, LLC | 0.00% | Add +259.2% | 11,444 | $2.6M |
| Barclays PLC | 0.00% | Reduce -26.0% | 11,393 | $2.6M |
| Cardinal Capital Management | 0.34% | Add +19.2% | 11,384 | $2.6M |
| Legal & General Group Plc | 0.00% | Reduce -14.3% | 11,373 | $2.6M |
| Focus Partners Wealth | 0.00% | Add +179.3% | 11,090 | $2.6M |
| Jefferies Financial Group Inc. | 0.03% | New | 11,100 | $2.6M |
| Oak Thistle LLC | 0.24% | Add +100.5% | 10,683 | $2.5M |
| Quantedge Capital Pte Ltd | 1.31% | New | 10,400 | $2.4M |
| California State Teachers Retirement System | 0.00% | Add +26.6% | 9,973 | $2.3M |
| BCGM Wealth Management, LLC | 0.58% | Add +3.5% | 9,944 | $2.3M |
| CenterBook Partners LP | 0.12% | Add +71.0% | 9,832 | $2.3M |
| Retirement Systems of Alabama | 0.01% | Add +2.1% | 9,430 | $2.2M |
| New York State Teachers Retirement System | 0.00% | Reduce -22.9% | 9,245 | $2.1M |
| Jane Street Group, LLC | 0.00% | Reduce -80.2% | 8,856 | $2.0M |
| Wealth Enhancement Advisory Services, LLC | 0.00% | Add +29.7% | 9,325 | $1.9M |
| T. Rowe Price Associates Inc. | 0.00% | Add +7.8% | 8,101 | $1.9M |
| Wedge Capital Management L L P | 0.03% | Reduce -16.6% | 8,028 | $1.8M |
| Mercer Global Advisors Inc. | 0.00% | Add +149.5% | 7,715 | $1.8M |
| Two Sigma Investments, LP | 0.00% | Reduce -53.9% | 7,500 | $1.7M |
| Gagnon Securities LLC | 0.39% | Add +13.9% | 7,239 | $1.7M |
| Voya Investment Management LLC | 0.00% | Add +53.6% | 7,220 | $1.7M |
| Alliancebernstein L.P. | 0.00% | Reduce -59.0% | 8,218 | $1.6M |
| Odyssean, LLC | 0.54% | New | 6,477 | $1.5M |
| Summit Trail Advisors, LLC | 0.02% | Add +58.4% | 6,418 | $1.5M |
| Voloridge Investment Management, LLC | 0.01% | Reduce -90.1% | 6,265 | $1.4M |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | Reduce -49.7% | 6,106 | $1.4M |
| VANGUARD ASSET MANAGEMENT, Ltd | 0.00% | — | 6,103 | $1.4M |
| Horizon Investments, LLC | 0.02% | New | 6,014 | $1.4M |
| Los Angeles Capital Management LLC | 0.01% | No change | 5,936 | $1.4M |
| State Board of Administration of Florida Retirement System | 0.00% | Reduce -26.1% | 5,909 | $1.4M |
| denkapparat Operations GmbH | 0.54% | Add +16.8% | 5,616 | $1.3M |
| XTX Topco Ltd | 0.02% | Reduce -40.6% | 5,492 | $1.3M |
| Manufacturers Life Insurance Company, The | 0.00% | Reduce -2.4% | 5,411 | $1.2M |
| State of Wisconsin Investment Board | 0.00% | Add +105.8% | 5,389 | $1.2M |
| Wells Fargo & Company | 0.00% | Reduce -3.4% | 5,300 | $1.2M |
"% of holder's portfolio" is SAM's weight in each manager's 13F, not the share of Boston Beer Company Inc. Class A the manager owns.