Latest Period
Q1 2026
Security Snapshot
BOSTON BEER CO INC - Class A Common Stock. $0.01 par value (SAM) Institutional Ownership
CUSIP: 100557107
13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026
Institutions Reporting
365
Shares (Excl. Options)
7,766,346
Price
$230.40
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- Security type / class
- Equity / Class A Common Stock. $0.01 par value
- Symbol
- SAM on NYSE
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 7,766,346
- Total 13F value
- $1,788,849,742
- Portfolio coverage rank
- 0%
- Share change
- +250,310
- Value change
- +$64,513,173
- Number of holders
- 365
- Shares outstanding
- 8,380,257
- SEC-reported price per share
- $240.43
- Insider filing price
- $240.43
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- SAM - BOSTON BEER CO INC - Class A Common Stock. $0.01 par value is tracked under CUSIP 100557107.
- 365 institutions reported positions in Q1 2026.
- 5 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 343 to 365 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $1,474,295,652 to $1,788,849,742.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 365 institutions filings for Q1 2026.
Security key
100557107
Latest holder period
Q1 2026
13F holders
365
13D/G owners
5
CIK / CUSIP context first
Open Q1 2026 holders
SAM full holder history
BOSTON BEER CO INC SEC filings
BOSTON BEER CO INC company facts
BOSTON BEER CO INC insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 100557107:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
5
Security
SAM
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| KOCH C JAMES | 22% | +8.2% | $443,232,331 | 2,271,472 | 0% | C. James Koch | 31 Dec 2025 | |
| VANGUARD GROUP INC | 12% | +20% | $202,775,974 | +$24,732,923 | 1,039,184 | +14% | The Vanguard Group | 31 Dec 2025 |
| AQR CAPITAL MANAGEMENT LLC | 7.8% | +53% | $158,516,870 | +$51,485,209 | 651,984 | +48% | AQR Capital Management, LLC | 31 Mar 2026 |
| FMR LLC | 2.3% | $47,499,207 | 195,365 | FMR LLC | 31 Mar 2026 | |||
| T. Rowe Price Investment Management, Inc. | 0.6% | $12,546,221 | 52,713 | T. Rowe Price Investment Management, Inc. | 31 Mar 2025 |
As of 31 Mar 2026, 365 institutional investors reported holding 7,766,346 shares of BOSTON BEER CO INC - Class A Common Stock. $0.01 par value (SAM). This represents 93% of the company’s total 8,380,257 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
69%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 9.2% | 770,250 | +6.2% | 0% | $177,465,697 |
| AQR CAPITAL MANAGEMENT LLC | 7.8% | 651,984 | +48% | 0.07% | $150,217,113 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 7.6% | 634,469 | 0% | 0.01% | $146,181,658 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4.1% | 340,903 | 0% | 0% | $78,544,051 |
| AMERICAN CENTURY COMPANIES INC | 3.4% | 288,084 | +50% | 0.03% | $66,374,554 |
| DIMENSIONAL FUND ADVISORS LP | 3.3% | 273,612 | +6.1% | 0.01% | $63,040,205 |
| STATE STREET CORP | 3% | 255,195 | +0.35% | 0% | $58,796,928 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 2.9% | 245,249 | -9.7% | 0.03% | $56,505,370 |
| Quantinno Capital Management LP | 2.8% | 230,587 | +155% | 0.09% | $53,127,245 |
| UBS Group AG | 2.6% | 218,604 | +0.91% | 0.01% | $50,366,362 |
| FMR LLC | 2.3% | 195,365 | -46% | 0% | $45,012,205 |
| Gotham Asset Management, LLC | 2% | 170,318 | -32% | 0.12% | $39,241,267 |
| Global Alpha Capital Management Ltd. | 1.8% | 147,525 | +20% | 2% | $33,989,760 |
| GOLDMAN SACHS GROUP INC | 1.7% | 144,960 | +160% | 0% | $33,398,837 |
| GEODE CAPITAL MANAGEMENT, LLC | 1.7% | 142,113 | +2.1% | 0% | $32,751,249 |
| MORGAN STANLEY | 1.6% | 134,511 | +18% | 0% | $30,991,520 |
| SOUTHEASTERN ASSET MANAGEMENT INC/TN/ | 1.4% | 118,401 | -20% | 1.3% | $27,279,590 |
| Invesco Ltd. | 1.4% | 115,612 | -1.3% | 0% | $26,637,004 |
| Qube Research & Technologies Ltd | 1.3% | 111,324 | -16% | 0.04% | $25,649,050 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.3% | 106,981 | +8.3% | 0% | $24,648,422 |
| MILLENNIUM MANAGEMENT LLC | 1.2% | 96,615 | +70% | 0.02% | $22,260,096 |
| RENAISSANCE TECHNOLOGIES LLC | 1.1% | 93,779 | +13% | 0.03% | $21,606,682 |
| AMERIPRISE FINANCIAL INC | 1.1% | 91,529 | +0.69% | 0% | $21,088,282 |
| Woodson Capital Management, LP | 1.1% | 90,000 | -10% | 3.4% | $20,736,000 |
| NORTHERN TRUST CORP | 0.94% | 78,992 | +5.5% | 0% | $18,199,757 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
49
Latest
Q1 2026
Rows shown
1-25 of 49
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 7,766,346 | $1,788,849,742 | +$64,513,173 | $230.40 | 365 |
| 2025 Q4 | 7,554,076 | $1,474,295,652 | -$73,150,912 | $195.13 | 343 |
| 2025 Q3 | 7,883,429 | $1,666,863,123 | +$54,934,102 | $211.42 | 351 |
| 2025 Q2 | 7,648,265 | $1,459,088,741 | +$69,350,793 | $190.81 | 341 |
| 2025 Q1 | 7,275,869 | $1,739,710,483 | -$37,297,176 | $238.84 | 324 |
| 2024 Q4 | 7,429,474 | $2,227,681,266 | +$92,718,723 | $299.98 | 341 |
| 2024 Q3 | 7,044,086 | $2,035,067,255 | -$7,410,475 | $289.14 | 329 |
| 2024 Q2 | 7,108,479 | $2,168,100,423 | -$53,273,624 | $305.05 | 323 |
| 2024 Q1 | 7,284,371 | $2,217,740,672 | -$53,693,867 | $304.42 | 323 |
| 2023 Q4 | 7,436,603 | $2,570,079,696 | -$138,445,421 | $345.59 | 339 |
| 2023 Q3 | 7,799,274 | $3,037,143,867 | -$10,653,737 | $389.53 | 320 |
| 2023 Q2 | 7,878,594 | $2,430,459,743 | -$72,583,499 | $308.44 | 294 |
| 2023 Q1 | 8,092,445 | $2,657,921,932 | -$17,522,435 | $328.70 | 299 |
| 2022 Q4 | 8,157,780 | $2,688,455,498 | -$109,303,435 | $329.52 | 312 |
| 2022 Q3 | 8,491,748 | $2,749,338,389 | -$460,974,221 | $323.65 | 284 |
| 2022 Q2 | 8,554,352 | $2,592,267,940 | +$254,886,937 | $302.97 | 291 |
| 2022 Q1 | 7,686,515 | $2,986,020,745 | -$50,585,432 | $388.47 | 305 |
| 2021 Q4 | 7,638,758 | $3,859,212,549 | -$256,686,477 | $505.10 | 373 |
| 2021 Q3 | 8,111,152 | $4,132,526,338 | -$703,934,247 | $509.75 | 364 |
| 2021 Q2 | 8,888,321 | $9,067,812,842 | +$55,724,383 | $1020.79 | 447 |
| 2021 Q1 | 8,790,285 | $10,602,896,052 | +$268,908,755 | $1206.28 | 411 |
| 2020 Q4 | 8,626,917 | $8,576,522,779 | +$152,267,931 | $994.30 | 399 |
| 2020 Q3 | 8,503,985 | $7,510,617,499 | -$119,414,726 | $883.36 | 367 |
| 2020 Q2 | 8,731,242 | $4,686,423,081 | -$41,916,879 | $536.65 | 318 |
| 2020 Q1 | 8,854,394 | $3,253,540,850 | +$22,301,869 | $367.56 | 275 |