[Form 4] BridgeBio Pharma, Inc. Insider Trading Activity

Rhea-AI Filing Summary

BridgeBio Pharma LLC, together with BridgeBio Pharma, Inc., reported acquiring 784,720 shares of BridgeBio Oncology Therapeutics, Inc. (BBOT) common stock on 10/10/2025 under transaction code J.

The shares were issued pursuant to an amendment to the Transition Services Agreement dated August 11, 2025, in exchange for additional financial and accounting support services provided through December 31, 2025.

After the transaction, 14,589,846 shares were beneficially owned. The shares are held by BridgeBio Pharma LLC, with voting and investment power exercised by its parent, BridgeBio Pharma, Inc. The reporting persons and directors disclaim beneficial ownership except to any pecuniary interest. The reporting person is identified as a director, and the form was filed by more than one reporting person.

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

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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^*

BridgeBio Pharma LLC

(Last) (First) (Middle)

C/O BRIDGEBIO PHARMA, INC.

3160 PORTER DRIVE, SUITE 250

(Street)

PALO ALTO CA 94304

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
BridgeBio Oncology Therapeutics, Inc. [ BBOT ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
10/10/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

	Form filed by One Reporting Person
X	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	10/10/2025		J		784,720	A	(1)	14,589,846	D(2)(3)

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

1. Name and Address of Reporting Person^*

BridgeBio Pharma LLC

(Last) (First) (Middle)

C/O BRIDGEBIO PHARMA, INC.

3160 PORTER DRIVE, SUITE 250

(Street)

PALO ALTO CA 94304

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

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

1. Name and Address of Reporting Person^*

BridgeBio Pharma, Inc.

(Last) (First) (Middle)

3160 PORTER DR., SUITE 250

(Street)

PALO ALTO CA 94304

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

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

Explanation of Responses:

1. Shares issued pursuant to an amendment to the Transition Services Agreement dated August 11, 2025 in exchange for additional financial and accounting support services provided through December 31, 2025.

2. Shares are held by BridgeBio Pharma LLC ("BBIO LLC"). Voting and investment power over the shares held by BBIO LLC is exercised by its parent entity, BridgeBio Pharma, Inc. ("BBIO"). The board of directors of BBIO consists of Neil Kumar, Ph.D., Eric Aguiar, M.D., Jennifer E. Cook, Douglas A. Dachille, Ronald J. Daniels, Andrea J. Ellis, Fred Hassan, Charles Homcy, M.D., Andrew W. Lo, Ph.D., Frank P. McCormick, Ph.D., F.R.S., D.Sc., James C. Momtazee, Ali J. Satvat, Randal W. Scott, Ph.D., and Hannah A. Valantine, M.D. (each a BBIO director, and collectively, the "BBIO Directors"). None of the members of the board of directors of BBIO or BBIO LLC has individual voting or investment power with respect to such shares. Each of BBIO and the BBIO Directors disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its, his, or her pecuniary interest therein, if any.

3. (Continued from Footnote 2) This report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

	/s/ Neil Kumar, Chief Executive Officer of BridgeBio Pharma LLC	10/16/2025
	/s/ Neil Kumar, Chief Executive Officer of BridgeBio Pharma, Inc.	10/16/2025
	** 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did BBIO report on Form 4 regarding BBOT?

BridgeBio Pharma LLC reported acquiring 784,720 BBOT common shares on 10/10/2025 under transaction code J.

Why were the 784,720 BBOT shares issued?

They were issued under an amendment to the Transition Services Agreement for additional financial and accounting support through December 31, 2025.

How many BBOT shares were beneficially owned after the transaction?

Beneficial ownership stood at 14,589,846 shares following the reported transaction.

Who holds the BBOT shares and who exercises voting power?

The shares are held by BridgeBio Pharma LLC; voting and investment power is exercised by its parent, BridgeBio Pharma, Inc.

Do the reporting persons claim full beneficial ownership of the BBOT shares?

They disclaim beneficial ownership except to the extent of any pecuniary interest.

What does transaction code J indicate on this Form 4?

Code J denotes an other type of acquisition, consistent here with shares issued for services under the agreement.

Was this Form 4 filed by multiple reporting persons?

Yes. It indicates the form was filed by more than one reporting person.