Were Christopher Vanderhook’s Viant (DSP) share sales pre‑planned?

Yes. The Class A share sales were made by Capital V LLC under a Rule 10b5‑1 trading plan adopted on March 18, 2025 and amended on September 17, 2025, meaning the sales were scheduled in advance rather than timed discretionarily around short‑term market movements.

Viant Technology (DSP) COO sells 12,500 Class A shares via 10b5-1 plan

Filing Impact

(Moderate)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

Viant Technology Inc.’s Chief Operating Officer Christopher Vanderhook reported a series of indirect transactions through Capital V LLC. On May 19, 2026, Capital V LLC exercised 12,500 Class B Units of Viant Technology LLC into 12,500 shares of Class A common stock, with a corresponding 12,500-share cancellation of Class B common stock as a disposition to the issuer. On May 19, 20 and 21, Capital V LLC then sold an aggregate of 12,500 Class A shares in open‑market transactions at weighted average prices of $10.8872, $10.5956 and $10.7885 per share under a Rule 10b5‑1 trading plan. Following these trades, Capital V LLC held 9,094,775 Class B Units and an equal number of shares of Class B common stock, in which Vanderhook has an indirect one‑third pecuniary interest.

Insider Trade Summary 10b5-1

Net Seller: 12,500 shares ($134,385)

Net Sell 6 txns

Insider Vanderhook Christopher

Role Chief Operating Officer

Sold 12,500 shs ($134K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock	2,500	$10.7885	$27K
Sale	Class A Common Stock	5,000	$10.5956	$53K
Exercise	Class B Units	12,500	$0.00	--
Exercise	Class A Common Stock	12,500	$0.00	--
Disposition	Class B Common Stock	12,500	$0.00	--
Sale	Class A Common Stock	5,000	$10.8872	$54K

Holdings After Transaction: Class A Common Stock — 0 shares (Indirect, By Capital V LLC); Class B Units — 9,094,775 shares (Indirect, By Capital V LLC); Class B Common Stock — 9,094,775 shares (Indirect, By Capital V LLC)

Footnotes (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. 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. 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. Shares sold pursuant to a 10b5-1 plan adopted by Capital V LLC on March 18, 2025, as amended on September 17, 2025. 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 $10.565 to $11.20. 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. 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 $10.31 to $10.96. 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. The price reported in Column 4 is a weighted average price, based on the Reporting Person's pro rata portion of a total of 7,500 shares of Class A Common Stock sold on behalf of Capital V LLC. These shares were sold in multiple transactions at prices ranging from $10.53 to $11.04. 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.

Key Figures

Class A shares sold: 12,500 shares Weighted average price 21 May: $10.7885 per share Weighted average price 20 May: $10.5956 per share +4 more

7 metrics

Class A shares sold 12,500 shares Open-market sales on May 19–21, 2026

Weighted average price 21 May $10.7885 per share Class A sale on May 21, 2026

Weighted average price 20 May $10.5956 per share Class A sale on May 20, 2026

Weighted average price 19 May $10.8872 per share Class A sale on May 19, 2026

Class B Units converted 12,500 units Exchanged into Class A common stock on May 19, 2026

Class B Units remaining 9,094,775 units Indirectly held by Capital V LLC after transactions

Net buy/sell shares -12,500 shares Net share change from reported non-derivative transactions

Key Terms

Rule 10b5-1 plan, Class B Units, pecuniary interest, disposition to issuer, +2 more

6 terms

Rule 10b5-1 plan financial

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

A Rule 10b5-1 plan is a prearranged, written schedule that lets corporate insiders buy or sell company stock at set times or amounts, even if they later learn material nonpublic information. Think of it like setting an automatic thermostat for trades: it creates a clear record that trades were planned in advance, reducing the risk of insider-trading accusations and helping investors trust that insider transactions are routine rather than based on secret information.

Class B Units financial

"The Class B Units of Viant Technology LLC ("Class B Units") are exchangeable, at the holder's option, on a one-for-one basis..."

pecuniary interest financial

"may therefore be deemed to have an indirect pecuniary interest in one-third of Capital V LLC's total holdings."

disposition to issuer financial

"transaction_action": "issuer disposition""

weighted average price financial

"The price reported in Column 4 is a weighted average price, based on the Reporting Person's pro rata portion..."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

indirect ownership financial

"direct_or_indirect": "I", "nature_of_ownership": "By Capital V LLC""

Form 4 Insider Transactions: What Each Field Means →

05/21/2026 - 09:35 PM

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 Christopher

(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)
	Chief Operating Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/19/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Class A Common Stock	05/19/2026		M⁽¹⁾		12,500	A	$0⁽¹⁾	12,500	I	By Capital V LLC⁽²⁾
Class B Common Stock	05/19/2026		D⁽³⁾		12,500	D	$0⁽³⁾	9,094,775	I	By Capital V LLC⁽²⁾
Class A Common Stock	05/19/2026		S⁽⁴⁾		5,000	D	$10.8872⁽⁵⁾	7,500	I	By Capital V LLC⁽²⁾
Class A Common Stock	05/20/2026		S⁽⁴⁾		5,000	D	$10.5956⁽⁶⁾	2,500	I	By Capital V LLC⁽²⁾
Class A Common Stock	05/21/2026		S⁽⁴⁾		2,500	D	$10.7885⁽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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Class B Units	⁽¹⁾	05/19/2026		M			12,500	⁽¹⁾	⁽¹⁾	Class A Common Stock	12,500	⁽¹⁾	9,094,775	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 $10.565 to $11.20. 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 $10.31 to $10.96. 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 7,500 shares of Class A Common Stock sold on behalf of Capital V LLC. These shares were sold in multiple transactions at prices ranging from $10.53 to $11.04. 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/ David Sincich, Attorney-in-Fact for Christopher Vanderhook	05/21/2026
	** 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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transactions did Viant (DSP) COO Christopher Vanderhook report?

Vanderhook reported indirect trades via Capital V LLC, including exercising 12,500 Class B Units into Class A shares and selling 12,500 Class A shares in open‑market transactions at weighted average prices around $10.6–$10.9, plus a related cancellation of 12,500 Class B common shares.

How many Viant (DSP) Class A shares did Capital V LLC sell?

Capital V LLC sold a total of 12,500 shares of Viant Class A common stock in three open‑market transactions on May 19, 20 and 21, 2026, at weighted average prices of $10.8872, $10.5956 and $10.7885 per share, respectively, all reported as indirect sales.

What Viant (DSP) holdings does Capital V LLC retain after these transactions?

After the reported transactions, Capital V LLC held 9,094,775 Class B Units of Viant Technology LLC and an equal number of shares of Viant Class B common stock. Vanderhook is reported to have an indirect pecuniary interest in one‑third of Capital V LLC’s total holdings.

What is the significance of the Class B Unit conversion at Viant (DSP)?

Each Class B Unit is exchangeable one‑for‑one into a Viant Class A share, with the corresponding Class B common share automatically cancelled. In this filing, 12,500 Class B Units were converted into 12,500 Class A shares, matched by cancellation of 12,500 Class B common shares.

How were the reported Viant (DSP) sale prices calculated?

The reported sale prices for the Class A stock are weighted averages based on Vanderhook’s pro rata portion of larger blocks sold by Capital V LLC. Actual trades occurred in multiple transactions within stated price ranges, and detailed price breakdowns are available upon request to the issuer or regulators.