Viant Technology (DSP) CEO-linked LLC sells 12,920 Class A shares

Rhea-AI Filing Summary

Viant Technology Inc. director, CEO and 10% owner Timothy Vanderhook reported indirect transactions through Capital V LLC, in which he holds a one-third interest. On March 17, 2026, Capital V LLC redeemed 12,500 Class B Units of Viant Technology LLC for an equal number of Class A common shares, and an equal number of Class B common shares were cancelled for no consideration. The same day, Capital V LLC sold 5,000 Class A shares in open-market transactions. Additional open-market sales of 5,000 and 2,920 Class A shares occurred on March 18 and March 19, 2026, respectively, leaving no Class A shares held indirectly after the final sale. The sales were executed under a Rule 10b5-1 trading plan adopted by Capital V LLC on March 18, 2025 and amended on September 17, 2025, at weighted average prices within disclosed ranges from $11.10 to $12.46 per share.

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

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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 Timothy

(Last) (First) (Middle)

C/O VIANT TECHNOLOGY INC.

2722 MICHELSON DRIVE, SUITE 100

(Street)

IRVINE CALIFORNIA 92612

(City) (State) (Zip)

UNITED STATES

(Country)

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)
	CEO and Chairman

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/17/2026

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)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	03/17/2026		M(1)		12,500	A	$0(1)	12,920	I	By Capital V LLC(2)
Class B Common Stock	03/17/2026		D(3)		12,500	D	$0(3)	9,119,775	I	By Capital V LLC(2)
Class A Common Stock	03/17/2026		S(4)		5,000	D	$11.7959(5)	7,920	I	By Capital V LLC(2)
Class A Common Stock	03/18/2026		S(4)		5,000	D	$11.9986(6)	2,920	I	By Capital V LLC(2)
Class A Common Stock	03/19/2026		S(4)		2,920	D	$11.4229(7)	0	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)	03/17/2026		M			12,500	(1)	(1)	Class A Common Stock	12,500	(1)	9,119,775	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 Capital V LLC of an equal number of Class B Units for Class A common stock.

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

5. 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 $11.59 to $12.23. 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.

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 $11.675 to $12.46. 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 8,760 shares of Class A Common Stock sold on behalf of Capital V LLC. These shares were sold in multiple transactions at prices ranging from $11.10 to $11.855. 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 Timothy Vanderhook	03/19/2026
	** 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)

FAQ

What insider transactions did Viant Technology (DSP) report for Timothy Vanderhook?

Timothy Vanderhook reported indirect transactions via Capital V LLC, including exercising 12,500 Class B Units into Class A shares and selling 12,920 Class A common shares in open-market trades over March 17–19, 2026 under a Rule 10b5-1 plan.

How many Viant Technology (DSP) shares were sold in this Form 4 filing?

Capital V LLC sold 12,920 shares of Viant Technology Class A common stock in three open-market blocks: 5,000 shares on March 17, 5,000 shares on March 18, and 2,920 shares on March 19, 2026, all reported as indirect holdings for Timothy Vanderhook.

At what prices were the Viant Technology (DSP) shares sold?

The reported weighted average sale prices were based on larger Capital V LLC trades, with individual transactions occurring in ranges from $11.10 to $12.46 per share. Exact share counts at each price are available on request from the issuer or the SEC staff.

What derivative conversion did Capital V LLC execute for Viant Technology (DSP)?

On March 17, 2026, Capital V LLC redeemed 12,500 Class B Units of Viant Technology LLC, receiving 12,500 Viant Class A common shares. Corresponding Class B common shares were cancelled for no consideration, consistent with the one-for-one exchange structure described in the footnotes.

Were the Viant Technology (DSP) insider sales part of a 10b5-1 trading plan?

Yes. The footnotes state that the Class A shares sold on March 17–19, 2026 were made pursuant to a Rule 10b5-1 trading plan adopted by Capital V LLC on March 18, 2025 and amended on September 17, 2025, indicating pre-planned trading activity.

How is Timothy Vanderhook’s interest in Capital V LLC described in the Viant Technology (DSP) filing?

The filing explains that Timothy Vanderhook holds a one-third interest in Capital V LLC and therefore may be deemed to have an indirect pecuniary interest in one-third of Capital V LLC’s total holdings, which include the reported Class A and Class B equity positions.