[Form 4] PubMatic, Inc. Insider Trading Activity

Rhea-AI Filing Summary

PubMatic, Inc. officer Paulina Klimenko reported a sale of 10,460 shares of Class A common stock on 10/03/2025 at a price of $8.3807 per share. After the transaction she beneficially owned 51,780 shares. The filing states the sale was effected under a Rule 10b5-1 trading plan adopted on 05/08/2025, indicating the trades were prearranged rather than discretionary. The Form 4 was signed by an attorney-in-fact on 10/06/2025.

Positive

• Sale executed under Rule 10b5-1 trading plan adopted on 05/08/2025
• Filing discloses post-transaction ownership of 51,780 shares, providing transparency

Negative

• Officer reduced direct holdings by 10,460 Class A shares
• Proceeds per share were $8.3807, which may be below recent trading levels (not stated in filing)

Insights

Corporate Insider Transactions Analyst

TL;DR: An officer sold 10,460 shares under a pre-established 10b5-1 plan, leaving 51,780 shares owned.

The sale of 10,460 Class A shares at $8.3807 was reported as a non-derivative disposition on 10/03/2025. The filing explicitly states the trades were made pursuant to a Rule 10b5-1 trading plan adopted on 05/08/2025, which typically provides an affirmative defense against insider trading claims when properly established.

This transaction reduces the officer's direct holdings to 51,780 shares and was certified by an attorney-in-fact on 10/06/2025. Monitor future Form 4s for additional planned-sale activity or changes to ownership, especially around quarterly reporting windows.

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).

X

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^*

Klimenko Paulina

(Last) (First) (Middle)

C/O PUBMATIC, INC.

601 MARSHALL STREET

(Street)

REDWOOD CITY CA 94063

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
PubMatic, Inc. [ PUBM ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
10/03/2025

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
Class A Common Stock	10/03/2025		S(1)		10,460	D	$8.3807	51,780	D

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. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 8, 2025.

	/s/ Andrew Woods, Attorney-in-Fact	10/06/2025
	** 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 PubMatic (PUB) officer Paulina Klimenko sell on 10/03/2025?

She sold 10,460 shares of Class A common stock at $8.3807 per share on 10/03/2025.

Was the sale by the PUB officer prearranged under a trading plan?

Yes. The Form 4 states the sale was effected pursuant to a Rule 10b5-1 trading plan adopted on 05/08/2025.

How many PubMatic shares does the reporting person own after the transaction?

Following the reported sale the reporting person beneficially owned 51,780 shares.

Who signed the Form 4 and when was it signed?

The Form 4 was signed by /s/ Andrew Woods, Attorney-in-Fact on 10/06/2025.

What is the relationship of the reporting person to PubMatic?

The reporting person is an Officer serving as Chief Growth Officer.