RayzeBio (RYZB) Form 3 RayzeBio / MARY TAGLIAFERRI ownership change

SEC Form 3

FORM 3

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

INITIAL STATEMENT OF 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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1. Name and Address of Reporting Person^*

TAGLIAFERRI MARY

(Last) (First) (Middle)

C/O RAYZEBIO, INC.

5505 MOREHOUSE DRIVE, SUITE 300

(Street)

SAN DIEGO CA 92121

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
09/14/2023

3. Issuer Name and Ticker or Trading Symbol
RayzeBio, Inc. [ RYZB ]

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

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

5. 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 Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Employee Stock Option (Right to Buy)	(1)	09/28/2031	Common Stock	73,731	3.24	D
Employee Stock Option (Right to Buy)	(2)	11/30/2032	Common Stock	40,848	3.24	D

Explanation of Responses:

1. The option is subject to an early exercise provision and is immediately exercisable. Vesting is monthly over a 36-month period starting October 29, 2021 in equal monthly amounts.

2. The option is subject to an early exercise provision and is immediately exercisable. Vesting is monthly over a 36-month period starting January 1, 2023 in equal monthly amounts.

Remarks:

Exhibit 24 - Power of Attorney

	/s/ Jeff Woodley, Attorney-in-fact	09/14/2023
	** 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 5 (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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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