Viant Technology (DSP) insider details Class A sales and unit swap

Rhea-AI Filing Summary

Viant Technology Inc. director, 10% owner and Chief Operating Officer Christopher Vanderhook reported several equity transactions involving Class A and Class B interests. On 12/16/2025, 12,500 Class B units of Viant Technology LLC were exchanged into 12,500 shares of Class A common stock at an exercise price of $0, with an equal number of Class B common shares cancelled. After this, 9,102 Class A shares were sold on 12/17/2025 at $11.704 in a transaction instituted by the company to cover estimated taxes from restricted stock unit vesting.

Additional sales of 5,000 Class A shares on 12/17/2025 at a weighted average price of $11.7366 and 5,000 shares on 12/18/2025 at a weighted average price of $11.928 were made on behalf of Capital V LLC under a Rule 10b5-1 trading plan. Following these transactions, Vanderhook directly owned 347,182 Class A shares and indirectly held 7,500 Class A shares and 9,157,275 Class B common shares through Capital V LLC, in which he has a one-third 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

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^*

Vanderhook Christopher

(Last) (First) (Middle)

C/O VIANT TECHNOLOGY INC.

2722 MICHELSON DRIVE, SUITE 100

(Street)

IRVINE CA 92612

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Viant Technology Inc. [ DSP ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
12/16/2025

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	12/16/2025		M(1)		12,500	A	$0(1)	12,500	I	By Capital V LLC(2)
Class B Common Stock	12/16/2025		D(3)		12,500	D	$0(3)	9,157,275	I	By Capital V LLC(2)
Class A Common Stock	12/17/2025		S(4)		9,102	D	$11.704	347,182	D
Class A Common Stock	12/17/2025		S(5)		5,000	D	$11.7366(6)	7,500	I	By Capital V LLC(2)
Class A Common Stock	12/18/2025		S(5)		5,000	D	$11.928(7)	2,500	I	By Capital V 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
Class B Units	(1)	12/16/2025		M(1)			12,500	(1)	(1)	Class A Common Stock	12,500	(1)	9,157,275	I	By Capital V LLC(2)

Explanation of Responses:

1. 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.

2. 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.

3. 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.

4. 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.

5. Shares sold pursuant to a 10b5-1 plan adopted by Capital V LLC on March 18, 2025, as amended on September 17, 2025.

6. The price reported in Column 4 is a weighted average price, based on the Reporting Person's pro rata portion of a total of 15,000 shares of Class A Common Stock sold on behalf of Capital V LLC. These shares were sold in multiple transactions at prices ranging from $11.485 to $12.235. The Reporting Person undertakes to provide the Issuer, any security holder 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 in this footnote.

7. The price reported in Column 4 is a weighted average price, based on the Reporting Person's pro rata portion of a total of 15,000 shares of Class A Common Stock sold on behalf of Capital V LLC. These shares were sold in multiple transactions at prices ranging from $11.62 to $12.175. The Reporting Person undertakes to provide the Issuer, any security holder 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 in this footnote.

Remarks:

	/s/ Larry Madden, Attorney-in-Fact for Christopher Vanderhook	12/18/2025
	** 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 insider transactions did DSP executive Christopher Vanderhook report?

Christopher Vanderhook, a director, 10% owner and Chief Operating Officer of Viant Technology Inc. (DSP), reported an exchange of 12,500 Class B units of Viant Technology LLC into 12,500 Class A common shares on 12/16/2025, the related cancellation of 12,500 Class B common shares, and several subsequent sales of Class A shares on 12/17/2025 and 12/18/2025.

How many Viant Technology Class A shares does Vanderhook own after these transactions?

After the reported transactions, Christopher Vanderhook directly owned 347,182 shares of Viant Technology Class A common stock and indirectly held 7,500 Class A shares through Capital V LLC.

What is Vanderhook’s indirect ownership in Viant Technology through Capital V LLC?

The filing states that Vanderhook holds a one-third interest in Capital V LLC and may be deemed to have an indirect pecuniary interest in one-third of its total holdings, which include 7,500 Class A shares and 9,157,275 shares of Class B common stock of Viant Technology.

Were any DSP shares sold under a Rule 10b5-1 trading plan?

Yes. The sale of 5,000 Class A shares on 12/17/2025 at a weighted average price of $11.7366 and the sale of 5,000 Class A shares on 12/18/2025 at a weighted average price of $11.928 were made on behalf of Capital V LLC pursuant to a Rule 10b5-1 plan adopted on March 18, 2025 and amended on September 17, 2025.

Why were some of Vanderhook’s Viant Technology shares sold to cover taxes?

The filing explains that 9,102 Class A shares sold on 12/17/2025 at $11.704 were sold in a transaction instituted by Viant Technology on Vanderhook’s behalf to cover estimated taxes tied to the vesting and settlement of restricted stock units.

How are Viant Technology LLC Class B units related to Class A common stock?

The Class B units of Viant Technology LLC are exchangeable one-for-one, at the holder’s option, into shares of Viant Technology’s Class A common stock. When a Class B unit is exchanged, the corresponding Class B common share is automatically cancelled.