SEC ownership of BOSTON BEER CO INC

Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000949870.

Comparable stake leader

C. James Koch

Disclosed value leader

C. James Koch

Comparable rows

50/50

Latest evidence

16 Jul 2026

Top shareholders Insider holders Latest transactions
Public ticker
SAM on NYSE
Parsed ownership sources
13D/G, 3/4/5, and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
Largest SEC-reported holder
C. James Koch
Ranking: Comparable ownership first, then disclosed value
Ownership snapshot CIK-linked ownership evidence from parsed SEC filings. 3 signals
Comparable ownership rows
50 of 50
Meaning: Rows with safely comparable ownership %
Latest 13D/G holder
C. James Koch
Source: Latest parsed Schedule 13D/G stake
Latest parsed ownership date
16 Jul 2026
Freshness: Most recent filing date in this holder set
Issuer Names, identifiers, and filing context for this profile. 2 identity fields
Issuer CIK
0000949870
Issuer location
Boston, MA

Ownership snapshot

Top shareholders of BOSTON BEER CO INC (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
50/50
Latest evidence
16 Jul 2026
13D/G 3/4/5 13F Lead comparable stake: 22% 13D/G row: C. James Koch Showing 1-8 of 50 holder rows.

Quick read

C. James Koch leads the comparable SEC ownership view at 22%.

50 of 50 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 6.5%
MILLENNIUM MANAGEMENT LLC 4.9%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-8 of 50 holder rows
Holder Evidence Ownership % Position 12M Net Δ As of
C. James Koch
13D/G 3/4/5
Chairman, Director, 10%+ Owner
13D/G 3/4/5
22%
$443,232,331
2,271,472 shares
 $0 31 Dec 2025
VANGUARD GROUP INC
13D/G
The Vanguard Group
13D/G
12%
$202,775,974
1,039,184 shares
 +$24,732,923 31 Dec 2025
BlackRock, Inc.
13F 13D/G
Company
13F 13D/G
11%
from 13D/G
$179,730,458
1,015,254 shares
 — 30 Jun 2026
AQR CAPITAL MANAGEMENT LLC
13D/G 13F
Company
13D/G 13F
6.5%
$99,152,597
539,988 shares
 -$20,564,706 30 Jun 2026
MILLENNIUM MANAGEMENT LLC
13D/G 13F
Company
13D/G 13F
4.9%
$72,832,526
411,413 shares
 $0 16 Jul 2026
FMR LLC
13D/G 13F
Company
13D/G 13F
2.3%
$47,499,207
195,365 shares
 $0 31 Mar 2026
T. Rowe Price Investment Management, Inc.
13F 13D/G
Company
13F 13D/G
0.6%
from 13D/G
$35,304,000
199,420 shares
 — 30 Jun 2026
Benefit Michael R. Crowley
3/4/5
Chief Sales Officer
3/4/5
0.15%
$3,213,633
12,812 shares
 — 01 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.

Forms 3/4/5 flow

Insider trading overview

Net insider flow leans to selling over the last 12 months. Net value: -$642,036.

Buys
$0
Insiders: 0
Sells
$642,036
Insiders: 1
Net
-$642,036
Shares: -3,120
Window
Last 12 months
4 rolling buckets
Buy value Sell value
Shares: 0 Shares: 3,120
Window (months) Buy shares Sell shares Buy value Sell value Net value
0-3 0 0 $0 $0 $0
3-6 0 0 $0 $0 $0
6-9 0 0 $0 $0 $0
9-12 0 3,120 $0 $642,036 -$642,036

Reporting owners

Insider holders from Forms 3/4/5

Showing 1-20 of 26 reporting-owner rows connected to BOSTON BEER CO INC. Open a relationship link for the CIK-to-CIK filing trail.

Rows
26
Largest Forms 3/4/5 holder
Samuel A. Calagione III
Net 12M change
-$642,036
Latest report
27 May 2026
Name Relationship Holdings Value Past Year Net Change Change % Valuation Report Date
Samuel A. Calagione III Founder & Brewer, Dogfish Head $116,564,609 Mixed 10 Aug 2023
C. James Koch Chairman, Director, 10%+ Owner $70,025,317 Mixed 31 Oct 2023
Benefit Cynthia A. Fisher Director $40,903,600 Mixed 27 May 2026
David Burwick As President and CEO, Director $17,364,613 Mixed 01 Mar 2024
Benefit Philip A. Hodges Chief Operating Officer $10,273,360 Mixed 01 Mar 2026
Jean Michel Valette Director $6,871,526 Mixed 13 Mar 2025
Diego Reynoso CFO and Treasurer $6,615,892 Mixed 01 Mar 2026
Benefit Frank H. Smalla Chief Financial Officer $5,930,386 Mixed 01 Mar 2023
Benefit Carolyn L. O'Boyle Chief People Officer $4,040,023 Mixed 19 Mar 2025
Benefit Lesya Lysyj Chief Marketing Officer $3,743,003 Mixed 01 Mar 2026
Tara L. Heath Chief Legal Officer $3,511,369 Mixed 01 Mar 2026
Benefit Michael R. Crowley Chief Sales Officer $3,213,633 Mixed 01 Mar 2026
Quincy B. Troupe Senior VP, Supply Chain $3,064,868 Mixed 03 Mar 2022
Michael Spillane Director $2,242,293 -$642,036 -22% Filing P/S 04 Nov 2025
Benefit Annette N. Fritsch VP of Product Design and R&D $2,141,937 Mixed 01 Mar 2026
Benefit John C. Geist Chief Sales Officer $1,921,738 Mixed 28 Jul 2023
Benefit Matthew D. Murphy CAO & VP of Finance $1,645,600 Mixed 20 Mar 2026
Benefit Philip E. Savastano Chief Supply Chain Officer $889,694 Mixed 01 Mar 2026
Benefit Laura J. Boynton Chief People Officer $632,593 Mixed 01 Mar 2026
Benefit David L. Grinnell Vice President of Brewing $555,521 Mixed 01 Jul 2022

Recent insider transactions for BOSTON BEER CO INC

Showing up to 300 recent insider transactions from the last 12 months.

Insider Symbol Class Transaction % SEC-reported value SEC-reported price Shares Shares owned Date Ownership
Benefit Christopher I. Stone SAM Class A Common Award 34% 358 1,411 27 May 2026 Direct
Benefit Christopher I. Stone SAM May 27, 2027 Stock Option Award 691 691 27 May 2026 Direct
Benefit Joseph H. Jordan SAM Class A Common Award 34% 358 1,411 27 May 2026 Direct
Benefit Joseph H. Jordan SAM May 27, 2026 Stock Option Award 691 691 27 May 2026 Direct
Benefit Cynthia L. Swanson SAM Class A Common Award 38.2% 358 1,294 27 May 2026 Direct
Benefit Cynthia L. Swanson SAM May 27, 2026 Stock Option Award 691 691 27 May 2026 Direct
Julio N. Nemeth SAM Class A Common Award -25% -358 1,076 27 May 2026 Direct
Julio N. Nemeth SAM May 27, 2026 Stock Option Award 691 691 27 May 2026 Direct
Benefit Cynthia A. Fisher SAM Class A Common Award 8.86% 358 4,399 27 May 2026 Direct
Benefit Cynthia A. Fisher SAM May 27, 2026 Stock Option Award 691 691 27 May 2026 Direct
Benefit Meghan V Joyce SAM Class A Common Award 49.9% 358 1,076 27 May 2026 Direct
Benefit Meghan V Joyce SAM May 27, 2026 Stock Option Award 691 691 27 May 2026 Direct
Benefit Cynthia A. Fisher SAM Class A Common Options Exercise 62.9% 1,560 4,041 02 Apr 2026 Direct
Benefit Cynthia A. Fisher SAM 5-25-2016 Stock Option Options Exercise -100% -1,560 0 02 Apr 2026 Direct
Benefit Matthew D. Murphy SAM Class A Common Award 1.82% 129 7,235 20 Mar 2026 Direct
Benefit Philip A. Hodges SAM Class A Common Tax liability -3.38% -1,587 45,301 01 Mar 2026 Direct
Benefit Lesya Lysyj SAM Class A Common Tax liability -2.27% -383 16,505 01 Mar 2026 Direct
Benefit Lesya Lysyj SAM March 1, 2023 Stock Option Award 100.2% 566 1,131 01 Mar 2026 Direct
Benefit Annette N. Fritsch SAM Class A Common Tax liability -2.78% -270 9,445 01 Mar 2026 Direct
Benefit Annette N. Fritsch SAM March 1, 2023 Stock Option Award 100.3% 309 617 01 Mar 2026 Direct
Benefit Matthew D. Murphy SAM Class A Common Award 33.8% 1,764 6,986 01 Mar 2026 Direct
Benefit Matthew D. Murphy SAM Class A Common Tax liability -3.56% -193 5,222 01 Mar 2026 Direct
Benefit Matthew D. Murphy SAM May 15, 2023 Stock Option Award 50% 986 2,958 01 Mar 2026 Direct
Benefit Matthew D. Murphy SAM March 1, 2023 Stock Option Award 100% 257 514 01 Mar 2026 Direct
Benefit Philip E. Savastano SAM Class A Common Award 77.1% 1,544 3,547 01 Mar 2026 Direct
Benefit Philip E. Savastano SAM Class A Common Stock Tax liability -6.27% -134 2,003 01 Mar 2026 Direct
Benefit Laura J. Boynton SAM Class A Common Award 110.5% 1,324 2,522 01 Mar 2026 Direct
Benefit Laura J. Boynton SAM Class A Common Stock Tax liability -6.84% -88 1,198 01 Mar 2026 Direct
Tara L. Heath SAM Class A Common Award 18.7% 2,206 13,999 01 Mar 2026 Direct
Tara L. Heath SAM Class A Common Tax liability -2.46% -297 11,793 01 Mar 2026 Direct
Tara L. Heath SAM March 1, 2023 Stock Option Award 100% 360 720 01 Mar 2026 Direct
Benefit Michael R. Crowley SAM Class A Common Award 20.8% 2,206 12,812 01 Mar 2026 Direct
Benefit Michael R. Crowley SAM Class A Common Stock Tax liability -3.12% -341 10,606 01 Mar 2026 Direct
Benefit Diego Reynoso SAM Class A Common Award 27.8% 5,734 26,376 01 Mar 2026 Direct
Benefit Diego Reynoso SAM Class A Common Tax liability -2.93% -622 20,642 01 Mar 2026 Direct
Benefit Diego Reynoso SAM October 31, 2023 Stock Option Award 50% 2,429 7,287 01 Mar 2026 Direct
Michael Spillane SAM Class A Common Sale -22.3% $642,036 $205.78 -3,120 10,877 04 Nov 2025 Direct
Michael Spillane SAM May 25, 2016 Stock Option Options Exercise 3,120 0 04 Nov 2025 Direct
Benefit Philip A. Hodges SAM Class A Common Award 39.1% 13,186 46,888 28 Oct 2025 Direct
Benefit Philip A. Hodges SAM October 28, 2025 Stock Option Award 88,268 88,268 28 Oct 2025 Direct
* marks a reported price that did not pass the local price check.
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