Viant Technology Inc. (Class A) Schedule 13G filed on behalf of Timothy Vanderhook reports that, as of March 31, 2026, the Reporting Person may be deemed to beneficially own 8,702,144 shares of Class A common stock, representing 32.4% of the Class A outstanding.
The filing states 18,270,658 Class A shares were outstanding as of April 9, 2026 and explains the ownership assumes a one-for-one redemption of Class B units. The filing also discloses that Vanderhook is part of a group with Capital V LLC and Christopher Vanderhook that would beneficially own 44,848,614 shares (71.5%).
Positive
None.
Negative
None.
Insights
Founder/CEO stake is large and disclosed under Schedule 13G.
The filing shows 8,702,144 shares beneficially owned by the Reporting Person as of March 31, 2026, equal to 32.4% of Class A based on the cited outstanding share count. The position combines record shares, options exercisable within 60 days, Class B unit conversions, and shares held in grantor trusts.
Because the filing also states a group ownership of 44,848,614 shares (71.5%), subsequent disclosures and any coordinated actions by group members are material to control questions. Future filings may show if group ownership is treated for governance votes or reporting changes.
Schedule 13G used for passive/qualified reporting; details show conversion assumptions.
The statement specifies the arithmetic basis: outstanding Class A shares 18,270,658 as of April 9, 2026 and a one-to-one redemption assumption for Class B units. It lists 715,160 options exercisable within 60 days and specific holdings in trusts and record accounts.
Investors should note the filing's classification and the explicit mechanics (options, Class B Units, trusts). Any change in intent or acquisition activity would require an amended filing under reporting rules.
Key Figures
Beneficial ownership (Reporting Person):8,702,144 sharesPercent of Class A:32.4%Shares outstanding:18,270,658 shares+5 more
8 metrics
Beneficial ownership (Reporting Person)8,702,144 sharesas of March 31, 2026
Percent of Class A32.4%based on 18,270,658 shares outstanding
Shares outstanding18,270,658 sharesas of April 9, 2026 (proxy statement cited)
Group beneficial ownership44,848,614 sharesgroup holding with Capital V LLC and Christopher Vanderhook
Group percent of Class A71.5%calculated pursuant to Rule 13d-3
Options exercisable within 60 days715,160 sharesincluded in beneficial ownership calculation
Class B unit equivalents held of record6,626,214 sharesassumed one-to-one redemption for Class A
Trust-held Class B unit equivalents1,207,560 sharesheld in grantor retained annuity trusts for Reporting Person's children
Key Terms
beneficially own, Class B Units, Schedule 13G, grantor retained annuity trusts
4 terms
beneficially ownregulatory
"The Reporting Person may be deemed to beneficially own 8,702,144 shares"
Beneficially own means having the economic rights and risks of a security—such as the right to receive dividends, sell the shares, or profit from price changes—whether or not your name appears on the official share register. Think of it like renting a car: you use it and reap the benefits even if the title lists someone else. Investors care because beneficial ownership determines who truly controls value, must be disclosed under securities rules, and can signal potential influence or trading activity that affects a stock’s price.
Class B Unitsfinancial
"assumes the redemption of the Class B units of Viant Technology LLC for shares"
Schedule 13Gregulatory
"This statement is filed on behalf of Timothy Vanderhook (the "Reporting Person")"
A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.
grantor retained annuity trustsfinancial
"held in grantor retained annuity trusts for the benefit of the Reporting Person's children"
A grantor retained annuity trust (GRAT) is an estate-planning tool where an owner transfers assets into a trust and receives fixed payments back for a set number of years; any remaining assets after that period pass to designated beneficiaries. For investors it matters because it can move future investment growth to heirs while potentially reducing gift and estate taxes — like putting a rising asset in a timed box that pays you first and gives the remaining upside to others.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
Viant Technology Inc.
(Name of Issuer)
Class A common stock, par value $0.001 per share
(Title of Class of Securities)
92557A101
(CUSIP Number)
03/31/2026
(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Rule 13d-1(b)
Rule 13d-1(c)
Rule 13d-1(d)
schemaVersion:
SCHEDULE 13G
CUSIP Number(s):
92557A101
1
Names of Reporting Persons
Timothy Vanderhook
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
UNITED STATES
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
8,702,144.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
8,702,144.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
8,702,144.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
32.4 %
12
Type of Reporting Person (See Instructions)
IN
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
Viant Technology Inc.
(b)
Address of issuer's principal executive offices:
2722 Michelson Drive, Suite 100, Irvine, California, 92612
Item 2.
(a)
Name of person filing:
This statement is filed on behalf of Timothy Vanderhook (the "Reporting Person").
(b)
Address or principal business office or, if none, residence:
The business address of the Reporting Person is c/o Viant Technology Inc., 2722 Michelson Drive, Suite 100, Irvine, CA 92612.
(c)
Citizenship:
The Reporting Person is a citizen of the United States of America
(d)
Title of class of securities:
Class A common stock, par value $0.001 per share
(e)
CUSIP Number(s):
92557A101
Item 3.
If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)
Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)
Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)
Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)
Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)
An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)
An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)
A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)
A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)
A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)
A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
please specify the type of institution:
(k)
Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.
Ownership
(a)
Amount beneficially owned:
The ownership information below represents beneficial ownership of the shares of Class A Common Stock as of March 31, 2026, based upon 18,270,658 shares of the Issuer's Class A Common Stock outstanding as of April 9, 2026, as disclosed in the Issuer's Definitive Proxy Statement filed with the Securities and Exchange Commission on April 23, 2026. The ownership information assumes the redemption of the Class B units of Viant Technology LLC ("Class B Units") beneficially owned by the Reporting Person for shares of the Issuer's Class A Common Stock on a one-to-one basis.
The Reporting Person may be deemed to beneficially own 8,702,144 shares of Class A Common Stock, including: (i) 153,210 shares of Class A Common Stock held of record by the Reporting Person, (ii) 715,160 shares of Class A Common Stock underlying stock options that are exercisable or will become exercisable within 60 days of March 31, 2026, (iii) 6,626,214 shares of Class A Common Stock underlying Class B Units held of record by the Reporting Person and (iv) 1,207,560 shares of Class A Common Stock underlying Class B Units held in grantor retained annuity trusts for the benefit of the Reporting Person's children, each of which the Reporting Person serves as trustee.
(b)
Percent of class:
32.4 %
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
8702144
(ii) Shared power to vote or to direct the vote:
0
(iii) Sole power to dispose or to direct the disposition of:
8702144
(iv) Shared power to dispose or to direct the disposition of:
0
Item 5.
Ownership of 5 Percent or Less of a Class.
Not Applicable
Item 6.
Ownership of more than 5 Percent on Behalf of Another Person.
Not Applicable
Item 7.
Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
Not Applicable
Item 8.
Identification and Classification of Members of the Group.
If a group has filed this schedule pursuant to §240.13d-1(b)(1)(ii)(K), so indicate under Item 3(k) and attach an exhibit stating the identity and Item 3 classification of each member of the group. If a group has filed this schedule pursuant to §240.13d-1(c) or §240.13d-1(d), attach an exhibit stating the identity of each member of the group.
The Reporting Person acknowledges and agrees that he is acting as a "group" with Capital V LLC and Christopher Vanderhook within the meaning of Section 13(d) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"). Based in part on information provided by the Issuer, as of the date hereof, such a "group" would be deemed to beneficially own an aggregate of 44,848,614 shares of Class A Common Stock, or 71.5% of the Class A Common Stock, calculated pursuant to Rule 13d-3 of the Exchange Act.
Item 9.
Notice of Dissolution of Group.
Not Applicable
Item 10.
Certifications:
SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.
How many Viant (DSP) Class A shares does Timothy Vanderhook beneficially own?
The filing reports 8,702,144 shares beneficially owned by Timothy Vanderhook as of March 31, 2026. This total combines record shares, exercisable options, converted Class B unit equivalents, and trust-held shares as detailed in the schedule.
What percent of Viant Class A stock does Vanderhook hold?
The Schedule 13G states Vanderhook's position represents 32.4% of Class A common stock, based on an outstanding share count of 18,270,658 disclosed in the proxy statement cited in the filing.
What is the group's aggregate ownership mentioned in the filing?
The filing says Vanderhook, together with Capital V LLC and Christopher Vanderhook, would beneficially own 44,848,614 shares, equal to 71.5% of Class A common stock, calculated under Rule 13d-3 based on the provided data.
Does the filing include convertible instruments or options in the ownership total?
Yes. The filing includes 715,160 options exercisable or becoming exercisable within 60 days, and Class B unit equivalents totaling 6,626,214 plus trust-held equivalents, which are included in the beneficial ownership calculation.
What outstanding share count did the filing use to calculate percentages?
The filing references 18,270,658 shares outstanding as of April 9, 2026, taken from the issuer's definitive proxy statement, and binds the percent calculations to that figure.
