Statement of Changes in Beneficial Ownership (Form 4)

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b). Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * Lysyj Lesya 2. Issuer Name and Ticker or Trading Symbol BOSTON BEER CO INC [SAM] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Chief Marketing Officer (Last) (First) (Middle) C/O THE BOSTON BEER COMPANY, INC., ONE DESIGN CENTER PLACE SUITE 850 3. Date of Earliest Transaction (Month/Day/Year) 03/01/2026 (Street) BOSTON, MA 02210 4. If Amendment, Date Original Filed (Month/Day/Year) 6. Individual or Joint/Group Filing (Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Class A Common 03/01/2026 F(1) 383 D $226.78 16,505(2) D

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

March 1, 2023 Stock Option

$323.8

03/01/2026

A

566

03/01/2025(3)

02/28/2033

Class A Common

1,697

$ 0

1,131

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Lysyj Lesya C/O THE BOSTON BEER COMPANY, INC. ONE DESIGN CENTER PLACE SUITE 850 BOSTON, MA 02210			Chief Marketing Officer

Signatures

Michael G. Andrews under POA for the benefit of Lesya Lysyj		03/03/2026
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	The Issuer net withheld the vesting of a percentage of shares to satisfy the tax obligations of the Reporting Person flowing from the vesting of Restricted Stock Units ("RSUs"). The Reporting Person had a total of 1,293 RSUs vest on March 1, 2026.
(2)	The shares reported include 9,465 shares of restricted stock subject to vesting conditions.
(3)	The Performance-Based Stock Options were granted pursuant to the Issuer's Employee Equity Incentive Plan ("EEIP") on March 1, 2023. The extent to which the options were exercisable was dependent upon the Company achieving certain compounded annual growth rate targets based on net revenue growth in Fiscal Year 2024 over Fiscal Year 2022. In February 2025, the Compensation Committee determined that the performance criteria had been achieved, and as such the options will vest in three equal installments on March 1 in the years 2025-2027, contingent on the Reporting Person's continued employment with the Issuer on the applicable vesting dates.

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