[Form 4] REVELATION BIOSCIENCES, INC. Insider Trading Activity

Rhea-AI Filing Summary

Revelation Biosciences, Inc. Chief Financial Officer Chester S. Zygmont III reported a mandatory sale of 13,100 shares of common stock on February 4, 2026. The issuer sold these shares on his behalf solely to cover tax withholding from vesting restricted stock awards.

The weighted average sale price was $1.65 per share, with individual trades ranging from $1.63 to $1.66. All share figures reflect a 1-for-4 reverse stock split effective January 28, 2026. After the transaction, 105,348 shares are held indirectly by The Zygmont Family Trust and 2 shares are held indirectly by Czeslaw Capital Fund, LLC, both entities associated with the CFO.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Zygmont Chester Stanley III

Role Chief Financial Officer

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	13,100	$1.65	$22K
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 105,348 shares (Indirect, By Trust)

Footnotes (1)

1. All share numbers reflect a 1-for-4 reverse stock split effective January 28, 2026. Represents shares sold by the issuer on behalf of the reporting person solely to satisfy required tax withholding obligations arising upon the vesting of restricted stock awards. The transaction was mandatory and the reporting person did not exercise investment discretion with respect to the sale. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.63 to $1.66, inclusive. The reporting person undertakes to provide to Revelation Biosciences, Inc. (REVB), any security holder of REVB, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Shares are held by The Zygmont Family Trust Dated October 25, 2016, with respect to which Chester S Zygmont III is a trustee. Shares are held by Czeslaw Capital Fund, LLC. Chester S Zygmont III is the sole manager of Czeslaw Capital Fund, LLC.

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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 for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Zygmont Chester Stanley III

(Last) (First) (Middle)

C/O REVELATION BIOSCIENCES, INC.

4660 LA JOLLA VILLAGE DR., SUITE 100

(Street)

SAN DIEGO CA 92122

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
REVELATION BIOSCIENCES, INC. [ REVB ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Financial Officer

3. Date of Earliest Transaction (Month/Day/Year)
02/04/2026

4. If Amendment, Date of 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

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
Common Stock	02/04/2026		F		13,100(1)(2)	D	$1.65(3)	105,348(1)	I	By Trust(4)
Common Stock								2(1)	I	By LLC(5)

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 Securities Underlying Derivative Security (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: 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

Explanation of Responses:

1. All share numbers reflect a 1-for-4 reverse stock split effective January 28, 2026.

2. Represents shares sold by the issuer on behalf of the reporting person solely to satisfy required tax withholding obligations arising upon the vesting of restricted stock awards. The transaction was mandatory and the reporting person did not exercise investment discretion with respect to the sale.

3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.63 to $1.66, inclusive. The reporting person undertakes to provide to Revelation Biosciences, Inc. (REVB), any security holder of REVB, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

4. Shares are held by The Zygmont Family Trust Dated October 25, 2016, with respect to which Chester S Zygmont III is a trustee.

5. Shares are held by Czeslaw Capital Fund, LLC. Chester S Zygmont III is the sole manager of Czeslaw Capital Fund, LLC.

	/s/ J.P. Galda, as attorney-in-fact for Chester S Zygmont III	02/05/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
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