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Boston Beer SAM

US equityMarket cap rank #2891Beverages - Brewers
$167.69 +$0.19 (+0.11%)
Market closed · Oct 5, 10:20 pm ET · Last extended-hours $167.69 0.00%
Open$166.95
Prev close$167.50
Day range$163.54 – $168.01
Volume156.4K
Market cap$1.73B
P/E (TTM)–
Dividend yield–

Ownership & positioning

Who holds it, who is betting against it, and where the big money is moving

Institutional ownership86.9%+0.57 pts vs. prior quarter
Institutions holding375-2 vs. prior quarter
Insider trades (recent)37 buys / 11 sellsNet buying
Short interest15.37% of floatDays to cover 7.2 · as of 15 Sep 2026
Short-sale volume share21.9%5-day average of daily volume

Short-sale volume as % of daily volume

16%20%25%29%Sep '26Sep '26Oct '26

Large-order net flow, last 20 sessions

Net of large-order buying minus selling, in USD. Over this window: +$174.3K (9 inflow days, 11 outflow days).

The five largest holders on file together own 48.4% of shares outstanding.

Largest holders

  • C. Koch22.49%
  • BlackRock10.07%
  • Vanguard Portfolio Management, LLC6.04%
  • AQR Capital Management5.35%
  • UBS Asset Management4.47%
  • Millennium Management LLC4.08%
  • Vanguard Capital Management, LLC3.95%
  • American Century Investment Management3.82%

By investor type

  • Mutual Fund64.32%
  • Individual/Insider27.41%
  • Hedge Fund17.20%
  • Public Company3.56%
  • Private Company0.99%
  • Government Pension Fund0.69%
  • Family Office/Trust0.13%
  • Insurance Company0.03%

Reported short interest has fallen from 15.57% to 15.37% of float over the last 6 biweekly reports (30 Jun 2026 to 15 Sep 2026).

Short interest, by report

Report dateShares short% of floatDays to cover
15 Sep 2026 1,581,690 15.4% 7.2
31 Aug 2026 1,422,860 13.8% 8.9
14 Aug 2026 1,413,558 13.7% 7.6
31 Jul 2026 1,394,217 13.5% 3.7
15 Jul 2026 1,569,751 15.1% 5.6
30 Jun 2026 1,621,715 15.6% 4.3

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