BioAtla (NASDAQ: BCAB) CEO receives 430,000-share RSU grant

Rhea-AI Filing Summary

SHORT JAY M PHD reported acquisition or exercise transactions in this Form 4 filing.

BioAtla, Inc. CEO and director Jay M. Short received a grant of 430,000 shares of Common Stock in the form of a time-based restricted stock unit award. The award was granted at no cash cost and is structured to vest over several years.

According to the vesting schedule, 25% of the RSU is scheduled to vest on March 11, 2027, with an additional 6.25% vesting on the last day of each May, August, November and February thereafter, subject to his continued service. Following this grant, Dr. Short directly holds 2,659,603 shares of Common Stock.

The filing also lists indirect holdings in BioAtla shares held by his spouse, various 2020 irrevocable gift trusts, Capia IP, LLC and Himalaya Parent LLC. For Himalaya Parent LLC, he and his spouse act as managers and collectively make investment decisions, while each disclaims beneficial ownership except to the extent of any pecuniary interest.

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^*

SHORT JAY M PHD

(Last) (First) (Middle)

C/O BIOATLA, INC. 11085 TORREYANA ROAD

(Street)

SAN DIEGO CA 92121

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
BioAtla, Inc. [ BCAB ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
03/11/2026

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	03/11/2026		A		430,000(1)	A	$0	2,659,603	D
Common Stock								793,547	I	By Spouse
Common Stock								258,727	I	By Carolyn Short 2020 Irrevocable Gift Trust
Common Stock								258,727	I	By Jay Short 2020 Irrevocable Gift Trust
Common Stock								302,324	I	By Capia IP, LLC
Common Stock								50	I	By Himalaya Parent LLC(2)

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. Represents shares of Common Stock underlying a time-based restricted stock unit award ("RSU"). The RSU will vest as to 25% of the total number of shares on March 11, 2027, and thereafter, 6.25% of the total number of shares subject to the RSU shall vest on the last day of each May, August, November and February, subject to the reporting person's continued service through the applicable vesting date.

2. The Reporting Person and his spouse are the managers of Himalaya Parent LLC and collectively make investment decisions on the behalf of the entity. The Reporting Person and his spouse disclaim beneficial ownership of the reported securities except to the extent of his or her pecuniary interest therein.

	Christian Vasquez, as Attorney-in-Fact for Jay M. Short	03/12/2026
	** 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).
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 BioAtla (BCAB) disclose about CEO Jay Short’s latest equity grant?

BioAtla disclosed that CEO Jay M. Short received a grant of 430,000 shares of Common Stock as a time-based restricted stock unit award. The grant was made at no cash cost and is tied to a multi-year service-based vesting schedule.

How do the 430,000 BioAtla RSUs granted to the CEO vest over time?

The 430,000-share RSU award vests 25% on March 11, 2027. After that, 6.25% of the total shares vest on the last day of each May, August, November and February, subject to Jay Short’s continued service with the company through each vesting date.

How many BioAtla shares does CEO Jay Short hold directly after this Form 4?

After the reported RSU grant, Jay Short directly holds 2,659,603 shares of BioAtla Common Stock. This figure reflects his direct ownership position reported as of the transaction date and does not include additional indirect holdings through family members or entities.

What indirect BioAtla (BCAB) holdings related to Jay Short are reported in the filing?

The filing reports indirect holdings in BioAtla Common Stock held by his spouse, two 2020 irrevocable gift trusts, Capia IP, LLC, and Himalaya Parent LLC. These entries reflect shares associated with entities or family members rather than additional direct purchases or sales by the CEO.

What does the filing say about Jay Short’s interest in Himalaya Parent LLC’s BioAtla shares?

The filing states that Jay Short and his spouse are managers of Himalaya Parent LLC and jointly make investment decisions for the entity. Both disclaim beneficial ownership of those BioAtla securities except to the extent of any pecuniary interest they may have in the LLC.