144: Filer Information

Filer CIK

0001284309

Filer CCC

XXXXXXXX

Is this a LIVE or TEST Filing?

LIVE

TEST

Submission Contact Information

Name

Phone

E-Mail Address

144: Issuer Information

Name of Issuer

Viant Technology Inc.

SEC File Number

001-40015

Address of Issuer

2722 Michelson Drive
Suite 100
Irvine
CALIFORNIA
92612

Phone

1-949-861-8888

Name of Person for Whose Account the Securities are To Be Sold

Lawrence Madden

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

Officer

144: Securities Information

Title of the Class of Securities To Be Sold

Name and Address of the Broker

Number of Shares or Other Units To Be Sold

Aggregate Market Value

Number of Shares or Other Units Outstanding

Approximate Date of Sale

Name the Securities Exchange

Common

Goldman Sachs & Co. LLC
200 West Street
New York � NY � 10282

73066

903826.42

21135122

09/16/2026

NASD

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class

Date you Acquired

Nature of Acquisition Transaction

Name of Person from Whom Acquired

Is this a Gift?

Date Donor Acquired

Amount of Securities Acquired

Date of Payment

Nature of Payment *

Common

03/15/2024

Acquired as compensation -- Restricted Stock Units

Issuer

4662

03/15/2024

Compensation

Common

03/18/2025

Acquired as compensation -- Restricted Stock Units

Issuer

1956

03/18/2025

Compensation

Common

03/15/2025

Acquired as compensation -- Restricted Stock Units

Issuer

4314

03/15/2025

Compensation

Common

06/10/2026

Acquired as compensation -- Restricted Stock Units

Issuer

19135

06/10/2026

Compensation

Common

03/10/2023

Acquired as compensation -- Restricted Stock Units

Issuer

9967

03/10/2023

Compensation

Common

12/10/2022

Acquired as compensation -- Restricted Stock Units

Issuer

7546

12/10/2022

Compensation

Common

12/10/2022

Acquired as compensation -- Restricted Stock Units

Issuer

7546

12/10/2022

Compensation

Common

02/10/2021

Acquired Class B common shares from Issuer in private transaction; Class B common shares to be converted to Class A common shares in connection with any sales

Issuer

17940

02/10/2021

None

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller

Title of Securities Sold

Date of Sale

Amount of Securities Sold

Gross Proceeds

Lawrence Madden
2722 Michelson Drive
Suite 100
Irvine � CA � 92612

Common

07/06/2026

10097

128999.27

Lawrence Madden
2722 Michelson Drive
Suite 100
Irvine � CA � 92612

Common

07/07/2026

9149

117664.37

Lawrence Madden
2722 Michelson Drive
Suite 100
Irvine � CA � 92612

Common

07/08/2026

11273

143109.61

Lawrence Madden
2722 Michelson Drive
Suite 100
Irvine � CA � 92612

Common

07/23/2026

2814

30069.56

Lawrence Madden
2722 Michelson Drive
Suite 100
Irvine � CA � 92612

Common

08/11/2026

27451

358515.55

144: Remarks and Signature

Remarks

The sales of shares set forth herein are made in connection with a selling plan dated 06/17/2026 that is intended to comply with Rule 10b5-1(c).

Date of Notice

09/16/2026

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

06/17/2026

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

Goldman Sachs & Co. LLC on behalf of Lawrence Madden

144: Filer Information

Submission Contact Information

144: Issuer Information

144: Securities Information

144: Securities To Be Sold

144: Securities Sold During The Past 3 Months

144: Remarks and Signature

ATTENTION:

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)