Boston Beer Co Inc
SAM- Exchange
- NYSE
- Industry
- Malt Beverages
- SEC CIK
- 0000949870
No open-market purchases or sales by Boston Beer Co Inc insiders were filed in the last 90 days; 330 institutions reported holding it in 13F filings for Q2 2026, worth $1.53B in total; Southeastern Asset Management (Longleaf) is the only superinvestor holding it.
Holders of 5% or more of SAM
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Boston Beer Co Inc, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Koch C James | 13G/A | 21.62%2.27M shares | +1.63 ppfrom 19.99% | Feb 7, 20252 filings | Feb 11, 2026 | SEC |
| AQR Capital Management LLC | 13G/A | 5.12%440.2K shares | −2.22 ppfrom 7.34% | Nov 14, 20252 filings | Feb 12, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
8 Schedule 13D and 13G filings on Boston Beer Co Inc, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Mar 26, 20264:40 PM ET | Vanguard Group Inc | 13G/A | 0.00%0 shares | −12.09 ppfrom 12.09%Below 5% | Mar 13, 2026 | SEC |
| Feb 12, 202612:13 PM ET | AQR Capital Management LLCand 1 other | 13G/A | 5.12%440.2K shares | −2.22 ppfrom 7.34% | Dec 31, 2025 | SEC |
| Feb 11, 202610:06 AM ET | Koch C James | 13G/A | 21.62%2.27M shares | +1.63 ppfrom 19.99% | Dec 31, 2025 | SEC |
| Jan 30, 20261:25 PM ET | Vanguard Group Inc | 13G/A | 12.09%1.04M shares | +2.04 ppfrom 10.05% | Dec 31, 2025 | SEC |
| Nov 14, 202511:50 AM ET | AQR Capital Management LLCand 1 other | 13G | 7.34%647.1K shares | New | Sep 30, 2025 | SEC |
| Jun 5, 20252:11 PM ET | Vanguard Group Inc | 13G/A | 10.05%912.4K shares | – | May 30, 2025 | SEC |
| May 14, 202510:47 AM ET | T. Rowe Price Investment Management, Inc. | 13G/A | 0.60%52.7K shares | –Below 5% | Mar 31, 2025 | SEC |
| Feb 7, 20258:47 AM ET | Koch C James | 13G/A | 19.99%2.27M shares | – | Dec 31, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Boston Beer Co Inc shares.
No Form 144 notices for Boston Beer Co Inc are on file.