Viant CEO disposes 8,636 shares to company

CEO Timothy Vanderhook had shares repurchased by Viant Technology (DSP) to cover taxes due on RSU vesting, leaving him with over 200,000 Class A shares.

Available on EDGAR 09/14/2026 - 07:30 PM EDT Accepted by SEC EDGAR 09/14/2026 - 07:30 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Viant Technology Inc. (DSP) reported that CEO and Chairman Timothy Vanderhook disposed of 8,636 shares of Class A common stock on September 10, 2026 in a disposition to the issuer at $12.74 per share. According to the disclosure, these shares were repurchased by Viant to cover estimated taxes due on the vesting of 16,198 restricted stock units on the same date. Following this tax-related transaction, Vanderhook directly holds 200,244 shares of Class A common stock.

Insider Trade Summary

Disposition: 8,636 shares

Disposition 1 txn

Insider Vanderhook Timothy

Role CEO and Chairman

Type	Security	Shares	Price	Value
Disposition	Class A Common Stock F1	8,636	$12.74	$110K

Holdings After Transaction: Class A Common Stock — 200,244 shares (Direct)

Holdings Before and After: Class A Common Stock, 208,880 to 200,244 shares (Direct)

Footnotes (1)

1. F1. Represents shares repurchased by the Issuer from the Reporting Person in the amount of estimated taxes to be paid by the Reporting Person in connection with the vesting of 16,198 restricted stock units on September 10, 2026.

Key Figures

Shares disposed to issuer: 8,636 shares Transaction price per share: $12.74 per share Shares held after transaction: 200,244 shares +1 more

4 metrics

Shares disposed to issuer 8,636 shares Class A common stock, disposition to issuer on September 10, 2026

Transaction price per share $12.74 per share Issuer repurchase from Timothy Vanderhook on September 10, 2026

Shares held after transaction 200,244 shares Direct Class A holdings by Timothy Vanderhook after disposition

RSUs vested 16,198 units Restricted stock units vesting on September 10, 2026 that triggered tax withholding

Key Terms

Disposition to issuer, restricted stock units, estimated taxes

3 terms

Disposition to issuer financial

"reported as a disposition to the issuer at $12.74 per share"

restricted stock units financial

"in connection with the vesting of 16,198 restricted stock units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

estimated taxes financial

"in the amount of estimated taxes to be paid by the Reporting Person"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did DSP CEO Timothy Vanderhook report on September 10, 2026?

He reported a disposition of 8,636 Class A shares back to Viant Technology Inc. on September 10, 2026, described as a repurchase by the issuer to cover estimated taxes related to RSU vesting.

How many DSP shares does Timothy Vanderhook hold after this Form 4 transaction?

After the reported transaction, Timothy Vanderhook directly holds 200,244 shares of Viant Technology Inc. Class A common stock, as disclosed in the Form 4.

What price per share applied to the Viant Technology (DSP) tax-related repurchase?

The issuer repurchased 8,636 shares from Timothy Vanderhook at $12.74 per share in the September 10, 2026 transaction, according to the Form 4 disclosure.

Why were DSP shares repurchased from Timothy Vanderhook in this Form 4?

The footnote states the shares were repurchased by Viant from Timothy Vanderhook in an amount corresponding to estimated taxes due upon the vesting of 16,198 restricted stock units on September 10, 2026.

Was the September 10, 2026 DSP insider transaction under a Rule 10b5-1 plan?

The filing’s Rule 10b5-1 checkbox is not checked, and there is no footnote stating it was under a trading plan, so no Rule 10b5-1 plan is reported for this transaction.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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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^*

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)
09/10/2026

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	09/10/2026		D		8,636(1)	D	$12.74	200,244	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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents shares repurchased by the Issuer from the Reporting Person in the amount of estimated taxes to be paid by the Reporting Person in connection with the vesting of 16,198 restricted stock units on September 10, 2026.

Remarks:

	/s/ Larry Madden, Attorney-in-Fact for Timothy Vanderhook	09/14/2026
	** 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)