BOSTON BEER INC SAM
CL A · Common Stock · CUSIP 100557107 · ISIN US1005571070
- SectorConsumer staples
- IndustryMalt Beverages
- HeadquartersBoston, MA
- Founded1985
- Websitebostonbeer.com
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($11.4m this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $177.17. Options: 10 managers hold calls ($17.9m notional), 8 hold puts ($21.5m).
Trends to Q2 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 301 |
| Q4 2022 | 320 |
| Q1 2023 | 304 |
| Q2 2023 | 298 |
| Q3 2023 | 325 |
| Q4 2023 | 343 |
| Q1 2024 | 327 |
| Q2 2024 | 326 |
| Q3 2024 | 333 |
| Q4 2024 | 347 |
| Q1 2025 | 329 |
| Q2 2025 | 348 |
| Q3 2025 | 356 |
| Q4 2025 | 347 |
| Q1 2026 | 370 |
| Q2 2026 | 331 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2024 | 133 | 164 |
| Q4 2024 | 147 | 148 |
| Q1 2025 | 164 | 153 |
| Q2 2025 | 182 | 144 |
| Q3 2025 | 179 | 173 |
| Q4 2025 | 120 | 220 |
| Q1 2026 | 198 | 136 |
| Q2 2026 | 154 | 194 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2025 | $33.3m | $25.7m | 0.77 |
| Q4 2025 | $11.3m | $13.0m | 1.14 |
| Q1 2026 | $13.9m | $20.2m | 1.46 |
| Q2 2026 | $17.9m | $21.5m | 1.20 |
Biggest buyers
| BlackRock, Inc. | Added | +245.0k |
| UBS Group AG | Added | +216.1k |
| MILLENNIUM MANAGEMENT LLC | Added | +186.9k |
| T. Rowe Price Investment Management, Inc. | Added | +120.9k |
| Global Alpha Capital Management Ltd. | Added | +120.0k |
| NEUBERGER BERMAN GROUP LLC | New | +117.5k |
| AMERICAN CENTURY COMPANIES INC | Added | +97.2k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Added | +75.8k |
| GEODE CAPITAL MANAGEMENT, LLC | Added | +63.3k |
| WORLDQUANT MILLENNIUM ADVISORS LLC | New | +62.7k |
Biggest sellers
| Gotham Asset Management, LLC | Reduced | -167.1k |
| FMR LLC | Reduced | -134.7k |
| Quantinno Capital Management LP | Reduced | -128.0k |
| AQR CAPITAL MANAGEMENT LLC | Reduced | -112.0k |
| Woodson Capital Management, LP | Sold out | -90.0k |
| Man Group plc | Sold out | -77.5k |
| Invesco Ltd. | Reduced | -57.0k |
| Qube Research & Technologies Ltd | Reduced | -48.7k |
| Corient Private Wealth LP | Reduced | -41.9k |
| Crawford Fund Management, LLC | Sold out | -39.4k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $6.2m35.3k shares |
| Squarepoint Ops LLC | New | $3.5m19.6k shares |
| CITADEL ADVISORS LLC | Added | $3.3m18.4k shares |
| IMC-Chicago, LLC | Reduced | $1.9m10.7k shares |
| Crawford Fund Management, LLC | New | $1.6m9.2k shares |
| UBS Group AG | New | $548.8k3.1k shares |
| TWO SIGMA INVESTMENTS, LP | New | $442.6k2.5k shares |
| TUDOR INVESTMENT CORP ET AL | New | $301.0k1.7k shares |
| SIMPLEX TRADING, LLC | Reduced | $53.1k300 shares |
| Walleye Capital LLC | New | $53.1k300 shares |
Biggest puts
| CITADEL ADVISORS LLC | Added | $6.5m36.7k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $5.3m29.9k shares |
| IMC-Chicago, LLC | Added | $4.1m23.2k shares |
| GROUP ONE TRADING LLC | Added | $2.5m14.0k shares |
| Squarepoint Ops LLC | New | $2.2m12.5k shares |
| TWO SIGMA INVESTMENTS, LP | Added | $566.5k3.2k shares |
| SIMPLEX TRADING, LLC | Reduced | $354.1k2.0k shares |
| Walleye Capital LLC | New | $17.7k100 shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| KOCH C JAMES 13G · exempt (held before listing) +1.6 pts · filed 2026-02-11 | 21.6% |
| BlackRock, Inc. 13G · institution +2.1 pts · filed 2026-10-27 | 13.4% |
| VANGUARD PORTFOLIO MANAGEMENT LLC 13G · institution new · filed 2026-04-29 | 7.6% |
| AQR CAPITAL MANAGEMENT LLC 13G · institution -1.3 pts · filed 2026-08-13 | 6.5% |
Fell to 5% or below in the last year: MILLENNIUM MANAGEMENT LLC (4.9%, 2026-07-22), FMR LLC (2.3%, 2026-05-06), VANGUARD GROUP INC (0.0%, 2026-03-26; now reported by VANGUARD PORTFOLIO MANAGEMENT LLC)
Insider purchases and sales since 1 Apr 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2024 | 0 | — | 1 | $55.7k | — |
| Q1 2025 | 0 | — | 2 | $818.3k | — |
| Q2 2025 | 0 | — | 0 | — | — |
| Q3 2025 | 0 | — | 1 | $131.5k | — |
| Q4 2025 | 0 | — | 1 | $642.0k | — |
| Q1 2026 | 0 | — | 0 | — | — |
| Q2 2026 | 0 | — | 0 | — | — |
| Q3 2026 | 0 | — | 0 | — | — |
None reported since 1 Apr 2026.
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| BlackRock, Inc. 0.00% of their portfolio | 1.0m $179.7m | Added +245.0k |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.00% of their portfolio | 609.4k $107.9m | Reduced -25.1k |
| AQR CAPITAL MANAGEMENT LLC 0.03% of their portfolio | 540.0k $95.6m | Reduced -112.0k |
| UBS Group AG 0.01% of their portfolio | 434.7k $76.9m | Added +216.1k |
| AMERICAN CENTURY COMPANIES INC 0.03% of their portfolio | 385.3k $68.2m | Added +97.2k |
| VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 345.8k $61.2m | Added +4.9k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.03% of their portfolio | 321.1k $56.8m | Added +75.8k |
| DIMENSIONAL FUND ADVISORS LP 0.01% of their portfolio | 320.9k $56.8m | Added +47.3k |
| STATE STREET CORP 0.00% of their portfolio | 314.7k $55.8m | Added +59.5k |
| MILLENNIUM MANAGEMENT LLC 0.03% of their portfolio | 283.5k $50.2m | Added +186.9k |
| Global Alpha Capital Management Ltd. 2.84% of their portfolio | 267.6k $47.4m | Added +120.0k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 205.4k $36.4m | Added +63.3k |
| T. Rowe Price Investment Management, Inc. 0.02% of their portfolio | 199.4k $35.3m | Added +120.9k |
| SOUTHEASTERN ASSET MANAGEMENT INC/TN/ 1.35% of their portfolio | 146.0k $25.9m | Added +27.6k |
| SOUTHERNSUN ASSET MANAGEMENT, LLC 3.14% of their portfolio | 131.9k $23.3m | Added +57.1k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 130.8k $23.2m | Reduced -14.1k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 126.2k $22.3m | Added +19.2k |
| NEUBERGER BERMAN GROUP LLC 0.01% of their portfolio | 117.5k $20.9m | New |
| MORGAN STANLEY 0.00% of their portfolio | 104.3k $18.5m | Reduced -30.2k |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 103.0k $18.2m | Added +11.5k |
| Quantinno Capital Management LP 0.02% of their portfolio | 102.6k $18.2m | Reduced -128.0k |
| RENAISSANCE TECHNOLOGIES LLC 0.02% of their portfolio | 102.2k $18.1m | Added +8.4k |
| D. E. Shaw & Co., Inc. 0.01% of their portfolio | 99.5k $17.6m | Added +52.8k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 98.8k $17.5m | Added +19.8k |
| Trexquant Investment LP 0.08% of their portfolio | 73.3k $13.0m | Added +43.5k |
| Calamos Advisors LLC 0.04% of their portfolio | 65.4k $11.6m | Reduced -1.4k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 63.5k $11.2m | Added +6.5k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 63.1k $11.2m | Added +18.7k |
| WORLDQUANT MILLENNIUM ADVISORS LLC 0.04% of their portfolio | 62.7k $11.1m | New |
| Qube Research & Technologies Ltd 0.01% of their portfolio | 62.6k $11.1m | Reduced -48.7k |
| FMR LLC 0.00% of their portfolio | 60.6k $10.7m | Reduced -134.7k |
| Invesco Ltd. 0.00% of their portfolio | 58.6k $10.4m | Reduced -57.0k |
| LOOMIS SAYLES & CO L P 0.01% of their portfolio | 58.3k $10.3m | Reduced -5.2k |
| VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio | 52.7k $9.3m | Added +5.1k |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 48.8k $8.6m | Reduced -4.4k |
| FIRST TRUST ADVISORS LP 0.00% of their portfolio | 45.3k $8.0m | Reduced -6.4k |
| Prescott General Partners LLC 0.41% of their portfolio | 45.0k $8.0m | Unchanged |
| MARSHALL WACE, LLP 0.01% of their portfolio | 42.5k $7.5m | Reduced -3.2k |
| GABELLI FUNDS LLC 0.05% of their portfolio | 42.4k $7.5m | Added +16.0k |
| Pacer Advisors, Inc. 0.02% of their portfolio | 38.2k $6.8m | Added +674 |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 35.9k $6.6m | Added +2.1k |
| HRT FINANCIAL LP 0.01% of their portfolio | 35.4k $6.3m | Added +16.3k |
| CAPITAL FUND MANAGEMENT S.A. 0.04% of their portfolio | 33.4k $5.9m | New |
| WINTON GROUP Ltd 0.19% of their portfolio | 33.0k $5.8m | Added +359 |
| Edgestream Partners, L.P. 0.17% of their portfolio | 32.9k $5.8m | New |
| FRANKLIN RESOURCES INC 0.00% of their portfolio | 32.6k $5.8m | Reduced -23.1k |
| Darwins River Capital, LP 2.99% of their portfolio | 30.8k $5.5m | New |
| TUDOR INVESTMENT CORP ET AL 0.02% of their portfolio | 30.5k $5.4m | New |
| ING GROEP NV 0.03% of their portfolio | 29.3k $5.2m | New |
| GAMCO INVESTORS, INC. ET AL 0.05% of their portfolio | 28.4k $5.0m | Added +292 |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 27.3k $4.8m | Added +4.0k |
| DARK FOREST CAPITAL MANAGEMENT LP 0.30% of their portfolio | 26.7k $4.7m | New |
| Nuveen, LLC 0.00% of their portfolio | 23.4k $4.1m | Added +4.8k |
| ALGERT GLOBAL LLC 0.05% of their portfolio | 21.8k $3.9m | Reduced -2.8k |
| Bridgewater Associates, LP 0.01% of their portfolio | 18.6k $3.3m | Added +16.8k |
| ExodusPoint Capital Management, LP 0.03% of their portfolio | 17.9k $3.2m | New |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 17.6k $3.1m | Reduced -8.5k |
| PRINCIPAL FINANCIAL GROUP INC 0.00% of their portfolio | 17.4k $3.1m | Added +162 |
| ACADIAN ASSET MANAGEMENT LLC 0.00% of their portfolio | 17.3k $3.1m | Reduced -7.3k |
| NOMURA HOLDINGS INC 0.01% of their portfolio | 16.5k $2.9m | Reduced -10.7k |
| Odyssean, LLC 0.47% of their portfolio | 16.3k $2.9m | Added +9.9k |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 15.8k $2.8m | Reduced -3.2k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 15.7k $2.8m | Reduced -220 |
| Swiss National Bank 0.00% of their portfolio | 15.1k $2.7m | Reduced -1.0k |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 14.8k $3.4m | Added +6.6k |
| Squarepoint Ops LLC 0.00% of their portfolio | 14.5k $2.6m | Reduced -3.5k |
| CenterBook Partners LP 0.12% of their portfolio | 13.8k $2.4m | Added +4.0k |
| XTX Topco Ltd 0.03% of their portfolio | 13.7k $2.4m | Added +8.2k |
| Schonfeld Strategic Advisors LLC 0.01% of their portfolio | 13.7k $2.4m | Added +9.8k |
| CAXTON ASSOCIATES LLP 0.04% of their portfolio | 12.9k $2.3m | New |
| Creative Planning 0.00% of their portfolio | 12.3k $2.2m | Reduced -14.1k |
| WEDGE CAPITAL MANAGEMENT L L P/NC 0.04% of their portfolio | 12.2k $2.2m | Added +4.2k |
| Legal & General Group Plc 0.00% of their portfolio | 12.0k $2.1m | Added +645 |
| Oak Thistle LLC 0.20% of their portfolio | 11.9k $2.1m | Added +1.3k |
| Savoir Faire Capital Management, L.P. 1.31% of their portfolio | 11.9k $2.1m | Reduced -3.2k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 11.8k $2.1m | Added +6.5k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 11.2k $2.0m | Added +3.1k |
| IEQ CAPITAL, LLC 0.01% of their portfolio | 10.7k $1.9m | Reduced -26.2k |
| BARCLAYS PLC 0.00% of their portfolio | 10.3k $1.8m | Reduced -1.1k |
| BCGM Wealth Management, LLC 0.38% of their portfolio | 10.2k $1.8m | Added +303 |
| Engineers Gate Manager LP 0.02% of their portfolio | 9.6k $1.7m | Added +7.6k |
| Quadrature Capital Ltd 0.01% of their portfolio | 9.5k $1.7m | New |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 8.9k $1.6m | Added +1.4k |
| Numerai GP LLC 0.13% of their portfolio | 8.9k $1.6m | Added +7.6k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 8.8k $1.5m | Added +7.4k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 8.5k $1.5m | Reduced -1.5k |
| VOYA INVESTMENT MANAGEMENT LLC 0.00% of their portfolio | 8.1k $1.4m | Added +885 |
| CITIGROUP INC 0.00% of their portfolio | 8.1k $1.4m | Added +4.8k |
| STATE OF WISCONSIN INVESTMENT BOARD 0.00% of their portfolio | 8.1k $1.4m | Added +2.7k |
| MetLife Investment Management, LLC 0.01% of their portfolio | 8.0k $1.4m | Added +4.2k |
| Retirement Systems of Alabama 0.00% of their portfolio | 7.7k $1.4m | Reduced -1.7k |
| Federation des caisses Desjardins du Quebec 0.00% of their portfolio | 7.6k $1.3m | Added +3.1k |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 7.4k $1.3m | Added +6.3k |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 7.4k $1.3m | Reduced -1.8k |
| GAGNON SECURITIES LLC 0.25% of their portfolio | 7.3k $1.3m | Added +44 |
| Jain Global LLC 0.01% of their portfolio | 7.1k $1.3m | Added +6.2k |
| OPPENHEIMER ASSET MANAGEMENT INC. 0.01% of their portfolio | 6.8k $1.2m | Added +3.7k |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio | 6.8k $1.2m | Added +1.4k |
| OSSIAM 0.02% of their portfolio | 6.7k $1.2m | New |
| Atom Investors LP 0.10% of their portfolio | 6.5k $1.1m | New |