What does CUSIP 100557107 represent in this 13F holders report?

CUSIP 100557107 is the security identifier for SAM - BOSTON BEER CO INC - Class A Common Stock, $0.01 par value used to aggregate holder disclosures.

How many institutions held SAM - BOSTON BEER CO INC - Class A Common Stock, $0.01 par value in Q2 2021?

447 institutional investors reported SAM - BOSTON BEER CO INC - Class A Common Stock, $0.01 par value for Q2 2021. Use the holders table for investor-level position and value details.

BOSTON BEER CO INC - Class A Common Stock, $0.01 par value (SAM)

CUSIP: 100557107

Q2 2021 13F Holders as of 30 Jun 2021

Security type / class: Equity / Class A Common Stock, $0.01 par value
Total 13F shares: 8,888,321
Total 13F value: $9,067,812,842
Share change: +110,588
Put/Call ratio: 122%
SEC-reported price per share: $1020.79
Number of holders: 447
Value change: +$55,724,383
Number of buys: 225
Number of sells: 178
Shares outstanding: 8,346,028

Security key

100557107

Report period

Q2 2021

Institutions

447

Top holders

SAM full security history Ownership snapshot Full 13F holder table Newer quarter: Q3 2026 BOSTON BEER CO INC SEC filings BOSTON BEER CO INC company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 100557107

Newer quarter: Q3 2026

Recent filing periods:

Q3 2026

Ownership snapshot

Top reported holders of SAM - BOSTON BEER CO INC - Class A Common Stock, $0.01 par value (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

PRICE T ROWE ASSOCIATES I...

Disclosed value leader

PRICE T ROWE ASSOCIATES I...

Comparable rows

0/15

Latest evidence

31 Mar 2021

13F Highest disclosed value: $1,628,058,000 15 rows are not safely comparable across share classes. Showing 1-6 of 15 holder rows.

Quick read

PRICE T ROWE ASSOCIATES INC /MD/ has the largest disclosed position value at $1.63B.

0 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 PRICE T ROWE ASSOCIATES INC /MD/'s linked filing trail.

Disclosed position value Top 5

PRICE T ROWE ASSOCIATES INC /MD/ $1.63B

BlackRock Finance, Inc. $1.34B

VANGUARD GROUP INC $1.05B

Durable Capital Partners LP $727.24M

WELLINGTON MANAGEMENT GROUP LLP $444.66M

Value bars compare disclosed positions; verify each figure against the linked filing evidence.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
PRICE T ROWE ASSOCIATES INC /MD/	13F Company 13F	— denominator unverified	$1,628,058,000 1,349,652 shares	—	31 Mar 2021
BlackRock Finance, Inc.	13F Company 13F	— denominator unverified	$1,335,433,000 1,107,066 shares	—	31 Mar 2021
VANGUARD GROUP INC	13F Company 13F	— denominator unverified	$1,050,523,000 870,879 shares	—	31 Mar 2021
Durable Capital Partners LP	13F Company 13F	— denominator unverified	$727,237,000 602,876 shares	—	31 Mar 2021
WELLINGTON MANAGEMENT GROUP LLP	13F Company 13F	— denominator unverified	$444,665,000 368,626 shares	—	31 Mar 2021
FMR LLC	13F Company 13F	— denominator unverified	$426,501,000 353,567 shares	—	31 Mar 2021

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 2021

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

447

8,888,321

Rows available

447

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 2021 vs Q1 2021 Across Filers

Q1 2021 holders

411

Q2 2021 holders

447

Holder diff

Investor	Q1 2021 Shares	Q2 2021 Shares	Share Diff	Share Chg %	Q1 2021 value	Q2 2021 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend