PubMatic (PUBM) growth chief sells 11,784 shares in 10b5-1 trade

Filing Impact

(Neutral)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

PubMatic, Inc. CHIEF GROWTH OFFICER Paulina Klimenko sold Class A Common Stock in a planned open-market transaction. On April 6, 2026, she sold 11,784 shares of PubMatic Class A Common Stock at a weighted average price of $8.443 per share, under a Rule 10b5-1 trading plan. After this sale, she directly held 61,436 shares of Class A Common Stock.

Insights

Pre-planned open-market sale of 11,784 PUBM shares; insider retains 61,436 shares.

PubMatic’s Chief Growth Officer, Paulina Klimenko, executed an open-market sale of 11,784 Class A shares at a weighted average of $8.443 per share. The filing states this sale was carried out under a Rule 10b5-1 trading plan, indicating it was pre-arranged rather than a discretionary market-timing decision.

Following the sale, Klimenko holds 61,436 shares directly, so the transaction represents only a portion of her reported equity stake. With no derivative positions listed in this filing, the event appears to be a routine liquidity transaction, rather than a large repositioning. Overall, this is a modest, pre-planned insider sale with limited standalone signaling value.

Insider Trade Summary 10b5-1

Net Seller: 11,784 shares ($99,492)

Net Sell 1 txn

Insider Klimenko Paulina

Role CHIEF GROWTH OFFICER

Sold 11,784 shs ($99K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock	11,784	$8.443	$99K

Holdings After Transaction: Class A Common Stock — 61,436 shares (Direct)

Footnotes (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. The price reported in this line item is a weighted average price. These shares were sold at prices ranging from $8.32 to $8.52, inclusive. The Reporting Person undertakes to provide to the Issuer, any securityholder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein.

Key Figures

Shares sold: 11,784 shares Weighted average sale price: $8.443 per share Post-transaction holdings: 61,436 shares +2 more

5 metrics

Shares sold 11,784 shares Open-market sale of Class A Common Stock on April 6, 2026

Weighted average sale price $8.443 per share Average price for 11,784 sold shares

Post-transaction holdings 61,436 shares Class A Common Stock directly held after sale

Sale price range $8.32–$8.52 per share Range of prices for individual trades within the reported sale

Rule 10b5-1 plan Pre-arranged trading plan Sales effected pursuant to a Rule 10b5-1 trading plan

Key Terms

Rule 10b5-1 trading plan, weighted average price, Class A Common Stock, open-market sale

4 terms

Rule 10b5-1 trading plan regulatory

"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

weighted average price financial

"The price reported in this line item is a weighted average price"

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

Class A Common Stock financial

"security_title: Class A Common Stock"

Class A common stock is a category of a company’s shares that carries a specific set of ownership rights—most commonly defined voting power and claims on dividends—set out in the company’s charter. For investors it matters because the class determines how much influence you have over corporate decisions, the share’s likely dividend and trading behavior, and how it compares in value to other share classes, like choosing a particular seat with different privileges at the company’s decision-making table.

open-market sale financial

"transaction_action: open-market sale"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Form 4 Insider Transactions: What Each Field Means →

04/08/2026 - 04:15 PM

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).

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

CALIFORNIA

94063

(City)

(State)

(Zip)

UNITED STATES

(Country)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/06/2026

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

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Class A Common Stock	04/06/2026		S⁽¹⁾		11,784	D	$8.443⁽²⁾	61,436	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

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.

2. The price reported in this line item is a weighted average price. These shares were sold at prices ranging from $8.32 to $8.52, inclusive. The Reporting Person undertakes to provide to the Issuer, any securityholder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein.

	/s/ Andrew Woods, Attorney-in-Fact	04/08/2026
	** 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.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR

FAQ

What did PubMatic (PUBM) executive Paulina Klimenko report in this Form 4?

PubMatic Chief Growth Officer Paulina Klimenko reported selling 11,784 shares of Class A Common Stock. The sale occurred on April 6, 2026, at a weighted average price of $8.443 per share, and was executed under a pre-arranged Rule 10b5-1 trading plan.

How many PubMatic (PUBM) shares did the Chief Growth Officer sell and at what price?

The Chief Growth Officer sold 11,784 PubMatic Class A Common shares at a weighted average price of $8.443 per share. Individual trade prices ranged from $8.32 to $8.52, according to the filing’s weighted-average price disclosure and accompanying footnote.

How many PubMatic (PUBM) shares does Paulina Klimenko hold after the reported sale?

After the reported transaction, Paulina Klimenko directly holds 61,436 shares of PubMatic Class A Common Stock. This indicates the 11,784 shares sold were only a portion of her total reported holdings, leaving a substantial remaining equity position in the company.

Was the PubMatic (PUBM) insider sale made under a Rule 10b5-1 trading plan?

Yes. The filing states the sales were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person. Such plans allow insiders to schedule trades in advance, helping separate routine portfolio moves from short-term market-timing decisions.

What price range did the PubMatic (PUBM) insider transactions cover?

The filing notes that the reported weighted average price of $8.443 per share reflects multiple trades. Shares were sold in a price range from $8.32 to $8.52, and the insider will provide full trade breakdowns upon request to the issuer, shareholders, or SEC staff.