Security key
100557107
- Security type / class
- Equity / Class A Stock
- Total 13F shares
- 14,335
- Total 13F value
- $2,537,756
- Share change
- +2,734
- SEC-reported price per share
- $177.03
- Number of holders
- 16
- Value change
- +$481,328
- Number of buys
- 3
- Number of sells
- 5
- Shares outstanding
- 8,381,912
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q2 2026
Institutions
16
Top holders
10
SAM full security history
Ownership snapshot
Full 13F holder table
Previous quarter: Q1 2026
BOSTON BEER CO INC SEC filings
BOSTON BEER CO INC company facts
Broader feeds
Reporting periods
Holder history for CUSIP 100557107
Recent filing periods:
Ownership snapshot
Top reported holders of SAM - BOSTON BEER CO INC - Class A Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
C. James Koch
Disclosed value leader
C. James Koch
Comparable rows
15/15
Latest evidence
31 Mar 2026
13D/G
3/4/5
13F
Lead comparable stake: 22%
13D/G row: C. James Koch
Showing 1-6 of 15 holder rows.
Quick read
C. James Koch leads the comparable SEC ownership view at 22%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens C. James Koch's linked filing trail.
Comparable ownership
Top 5
C. James Koch
22%
VANGUARD GROUP INC
12%
BlackRock, Inc.
11%
AQR CAPITAL MANAGEMENT LLC
7.8%
FMR LLC
2.3%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| C. James Koch |
13D/G
3/4/5
Chairman, Director, 10%+ Owner
|
22%
|
$443,232,331
2,271,472 shares
|
$0 | 31 Dec 2025 |
| VANGUARD GROUP INC |
13D/G
The Vanguard Group
|
12%
|
$202,775,974
1,039,184 shares
|
+$24,732,923 | 31 Dec 2025 |
| BlackRock, Inc. |
13F
13D/G
Company
|
11%
from 13D/G
|
$177,465,697
770,250 shares
|
— | 31 Mar 2026 |
| AQR CAPITAL MANAGEMENT LLC |
13D/G
13F
Company
|
7.8%
|
$158,516,870
651,984 shares
|
+$51,485,209 | 31 Mar 2026 |
| FMR LLC |
13D/G
13F
Company
|
2.3%
|
$47,499,207
195,365 shares
|
$0 | 31 Mar 2026 |
| T. Rowe Price Investment Management, Inc. |
13F
13D/G
Company
|
0.6%
from 13D/G
|
$18,098,000
78,548 shares
|
— | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q2 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
16
Shares
14,335
Rows available
16
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q2 2026 vs Q1 2026 Across Filers
Q1 2026 holders
366
Q2 2026 holders
16
Holder diff
-350
| Investor | Q1 2026 Shares | Q2 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q2 2026 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend