Viant Technology Inc. — Director's Dealing 2025

Sep 18, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Viant Technology Inc. (DSP)
CIK: 0001828791
Period of Report: 2025-09-15

Reporting Person: Vanderhook Christopher (Director, Chief Operating Officer, 10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-09-15	Class A Common Stock	S	8782	$9.7274	Disposed	356284	Direct
2025-09-16	Class A Common Stock	M	313926	—	Acquired	313926	Indirect
2025-09-16	Class B Common Stock	D	313926	—	Disposed	9169775	Indirect
2025-09-17	Class A Common Stock	D	313926	$9.5564	Disposed	0	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-09-16	Class B Units	$	M	313926	Disposed		Class A Common Stock (313926)	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Class B Common Stock	6626214	Direct
Class B Common Stock	301890	Indirect
Class B Common Stock	301890	Indirect
Class B Common Stock	301890	Indirect
Class B Common Stock	301890	Indirect

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Class B Units	$		Class A Common Stock (0)	6626214	Direct
Class B Units	$		Class A Common Stock (0)	301890	Indirect
Class B Units	$		Class A Common Stock (0)	301890	Indirect
Class B Units	$		Class A Common Stock (0)	301890	Indirect
Class B Units	$		Class A Common Stock (0)	301890	Indirect

Footnotes

F1: Shares were sold in a transaction instituted by the Issuer on the Reporting Person's behalf to cover estimated taxes associated with the vesting and settlement of restricted stock units.

F2: On December 20, 2024, the Reporting Person filed a Form 4, which inadvertently reported a gift of 31,556 shares of the Issuer's Class A common stock when the actual number of shares gifted was 31,566. The total number of shares of Class A common stock held by the Reporting Person has been corrected herein accordingly.

F3: The Class B Units of Viant Technology LLC ("Class B Units") are exchangeable, at the holder's option, on a one-for-one basis into shares of Class A common stock of the Issuer. Upon exchange of a Class B Unit, the
corresponding share of Class B common stock will be automatically cancelled.

F4: The Reporting Person holds a one-third interest in Capital V LLC and may therefore be deemed to have an indirect pecuniary interest in one-third of Capital V LLC's total holdings.

F5: Reflects the cancellation for no consideration of a number of shares of Class B common stock of the Issuer in connection with the redemption by the Reporting Person of an equal number of Class B
Units for Class A common stock.

F6: Pursuant to the Unit Exchange and Purchase Agreement dated September 15, 2025, the Issuer has purchased an aggregate of 941,777 shares of Class A common stock from Capital V LLC for an
aggregate price of approximately $9,000,000. The Reporting Person sold such shares to the Issuer in connection with tax planning.

F7: The change in the number of shares held by each GRAT reflects an annuity payment to the Reporting Person's direct holdings.

F8: Securities held by the Carter Vanderhook 2024 grantor retained annuity trust.

F9: Securities held by the Hayden Vanderhook 2024 grantor retained annuity trust.

F10: Securities held by the Clay Vanderhook 2024 grantor retained annuity trust.

F11: Securities held by the Colbie Vanderhook 2024 grantor retained annuity trust.

F12: The change in the number of Class B Units held by each GRAT reflects an annuity payment to the Reporting Person's direct holdings.