# EDGAR Filing Document

**Accession Number:** 0001828791
**File Stem:** 0001843104-25-000007
**Filing Date:** 2025-9
**Character Count:** 9648
**Document Hash:** ea3c8f19af551f6e8881f0ac6b801673
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001843104-25-000007.hdr.sgml**: 20250917

**ACCESSION NUMBER**: 0001843104-25-000007

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20250915

**FILED AS OF DATE**: 20250917

**DATE AS OF CHANGE**: 20250917

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Vanderhook Christopher
- **CENTRAL INDEX KEY:** 0001843104

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-40015
- **FILM NUMBER:** 251321310

**MAIL ADDRESS:**
- **STREET 1:** 2722 MICHELSON DRIVE
- **STREET 2:** SUITE 100
- **CITY:** IRVINE
- **STATE:** CA
- **ZIP:** 92612
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Viant Technology Inc.
- **CENTRAL INDEX KEY:** 0001828791
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-COMPUTER PROGRAMMING, DATA PROCESSING, ETC. [7370]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 853447553
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 2722 MICHELSON DRIVE
- **STREET 2:** SUITE 100
- **CITY:** IRVINE
- **STATE:** CA
- **ZIP:** 92612
- **BUSINESS PHONE:** 949-861-8888

**MAIL ADDRESS:**
- **STREET 1:** 2722 MICHELSON DRIVE
- **STREET 2:** SUITE 100
- **CITY:** IRVINE
- **STATE:** CA
- **ZIP:** 92612

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] 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**<sup>*</sup><br>Vanderhook Christopher<br><sub>(Last) (First) (Middle)</sub><br>C/O VIANT TECHNOLOGY INC.<br>2722 MICHELSON DRIVE, SUITE 100<br><sub>(Street)</sub><br>IRVINE, CA 92612<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-09-15 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [X] 10% Owner<br>[X] Officer (give title below) [ ] Other (specify below)<br>_Chief Operating Officer_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Viant Technology Inc. [ DSP ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Class A Common Stock | 2025-09-15 |  | S<sup>(1)</sup> |  | 8782 | D | $9.7274 | 356284<sup>(2)</sup> | D |  |
| Class A Common Stock | 2025-09-16 |  | M<sup>(3)</sup> |  | 313926 | A | 0<sup>(3)</sup> | 313926 | I | By Capital V LLC<sup>(4)</sup> |
| Class B Common Stock | 2025-09-16 |  | D<sup>(5)</sup> |  | 313926 | D | 0<sup>(5)</sup> | 9169775 | I | By Capital V LLC<sup>(4)</sup> |
| Class A Common Stock | 2025-09-17 |  | D<sup>(6)</sup> |  | 313926 | D | $9.5564 | 0 | I | By Capital V LLC<sup>(4)</sup> |
| Class B Common Stock |  |  |  |  |  |  |  | 6626214 | D |  |
| Class B Common Stock |  |  |  |  |  |  |  | 301890<sup>(7)</sup> | I | By GRAT<sup>(8)</sup> |
| Class B Common Stock |  |  |  |  |  |  |  | 301890<sup>(7)</sup> | I | By GRAT<sup>(9)</sup> |
| Class B Common Stock |  |  |  |  |  |  |  | 301890<sup>(7)</sup> | I | By GRAT<sup>(10)</sup> |
| Class B Common Stock |  |  |  |  |  |  |  | 301890<sup>(7)</sup> | I | By GRAT<sup>(11)</sup> |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Class B Units | <sup>(3)</sup> | 2025-09-16 |  | M<sup>(3)</sup> |  |  | 313926 | <sup>(3)</sup> | <sup>(3)</sup> | Class A Common Stock | 313926 | $0 | 9169775 | I | By Capital V LLC<sup>(4)</sup> |
| Class B Units | <sup>(3)</sup> |  |  |  |  |  |  | <sup>(3)</sup> | <sup>(3)</sup> | Class A Common Stock | 0 |  | 6626214 | D |  |
| Class B Units | <sup>(3)</sup> |  |  |  |  |  |  | <sup>(3)</sup> | <sup>(3)</sup> | Class A Common Stock | 0 |  | 301890<sup>(12)</sup> | I | By GRAT<sup>(8)</sup> |
| Class B Units | <sup>(3)</sup> |  |  |  |  |  |  | <sup>(3)</sup> | <sup>(3)</sup> | Class A Common Stock | 0 |  | 301890<sup>(12)</sup> | I | By GRAT<sup>(9)</sup> |
| Class B Units | <sup>(3)</sup> |  |  |  |  |  |  | <sup>(3)</sup> | <sup>(3)</sup> | Class A Common Stock | 0 |  | 301890<sup>(12)</sup> | I | By GRAT<sup>(10)</sup> |
| Class B Units | <sup>(3)</sup> |  |  |  |  |  |  | <sup>(3)</sup> | <sup>(3)</sup> | Class A Common Stock | 0 |  | 301890<sup>(12)</sup> | I | By GRAT<sup>(11)</sup> |

---

### Footnotes:

(1) 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.

(2) 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.

(3) 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, thecorresponding share of Class B common stock will be automatically cancelled.

(4) 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.

(5) 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.

(6) 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 anaggregate price of approximately $9,000,000. The Reporting Person sold such shares to the Issuer in connection with tax planning.

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

(8) Securities held by the Carter Vanderhook 2024 grantor retained annuity trust.

(9) Securities held by the Hayden Vanderhook 2024 grantor retained annuity trust.

(10) Securities held by the Clay Vanderhook 2024 grantor retained annuity trust.

(11) Securities held by the Colbie Vanderhook 2024 grantor retained annuity trust.

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

**Signature:** /s/ Larry Madden, Attorney-in-Fact for Christopher Vanderhook  
**Date:** 2025-09-17

### Remarks:

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.**