Klaus W. Wagner Form 3 Boundless Bio / Klaus W. Wagner 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^*

Wagner Klaus W.

(Last) (First) (Middle)

C/O BOUNDLESS BIO, INC.

9880 CAMPUS POINT DRIVE, SUITE 120

(Street)

SAN DIEGO CA 92121

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
03/27/2024

3. Issuer Name and Ticker or Trading Symbol
Boundless Bio, Inc. [ BOLD ]

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

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

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
Stock Option	(1)	02/23/2032	Common Stock	102,564	4.1	D
Stock Option	(2)	12/12/2032	Common Stock	9,635	4.1	D
Stock Option	(3)	06/12/2033	Common Stock	94,871	4.1	D
Stock Option	(4)	02/14/2034	Common Stock	68,080	8.19	D

Explanation of Responses:

1. The stock option vests as to 25% of the underlying shares on February 22, 2023, and vests as to the remaining underlying shares in 48 substantially equal monthly installments thereafter.

2. The stock option vests in 48 substantially equal monthly installments beginning on January 13, 2023.

3. The stock option vests in 48 substantially equal monthly installments beginning on July 13, 2023.

4. The stock option vests in 48 substantially equal monthly installments beginning on March 15, 2024.

Remarks:

Exhibit 24 - Power of Attorney.

	/s/ Jessica Oien, Attorney-in-Fact for Klaus Wagner	03/27/2024
	** 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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