Sec Form 4 Filing - CARLBORG W ERIC @ PubMatic, Inc. - 2021-11-15

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

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, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL OMB Number: 3235-0287 Expires: November 30, 2011 Estimated average burden hours per response... 0.5

1. Name and Address of Reporting Person CARLBORG W ERIC 2. Issuer Name and Ticker or Trading Symbol PubMatic, Inc. [ PUBM] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) PMB #456, 660 4TH STREET 3. Date of Earliest Transaction (MM/DD/YY) 11/15/2021 (Street) SAN FRANCISCO, CA94107 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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 11/15/2021 C( 1 ) 2,000,000 A 2,389,237 I See footnote( 2 ) Class A common stock 11/16/2021 J( 3 ) 2,000,000 D 389,237 I See footnote( 2 ) Class A common stock 11/16/2021 J( 3 ) 74,954 A 184,610 D( 4 )

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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 7. Title and Amount of Underlying Securities (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 of Derivative Security: 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 Class B common stock ( 1 ) 11/15/2021 C( 1 ) 2,000,000 ( 1 ) ( 1 ) Class A common stock 2,000,000 $ 0( 1 ) 1,673,750 I See footnote( 2 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other CARLBORG W ERIC PMB #456, 660 4TH STREET SAN FRANCISCO, CA94107 X X Signatures /s/ Abigail Hipps, Attorney-in-Fact 11/17/2021 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Each share of Class B common stock held by the Issuer's executive officers, directors and their respective affiliates will convert automatically into one share of Class A common stock upon any transfer that occurs after the closing of the Issuer's initial public offering, except for certain permitted transfers. ( 2 )These securities are held by August Capital V Special Opportunities, L.P. (the "Fund"). August Capital Management V, L.L.C. is the general partner of the Fund (the "August General Partner") and may be deemed to have sole voting power and sole investment power over the shares held by the Fund. Howard Hartenbaum and David M. Hornik are the members of the August General Partner and they, along with W. Eric Carlborg as a voting party with respect to the Issuer's securities, may be deemed to share voting and investment power with respect to the shares held by the Fund. ( 3 )Represents a pro-rata in-kind distribution of Class A common stock to the partners of the Fund and the members and assignees of the August General Partner, and not a purchase or sale, without additional consideration. ( 4 )Shares held directly by W. Eric Carlborg.

Remarks: This report is one of two reports, each on a separate Form 4, but relating to the same transactions being filed by entities and persons affiliated with August Capital. Each Reporting Person disclaims beneficial ownership of these shares except to the extent of such person's pecuniary interest therein, if any.

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.