DSP Form 144: Insider resale of Class A shares

DSP: Notice of proposed resale and recent sales of Class A Common Stock under Rule 144.

Rhea-AI Filing Summary

DSP: Notice of proposed resale and recent sales of Class A Common Stock under Rule 144. The filing lists restricted stock units awarded (16,199 units) and multiple short-form resale entries showing sales by Christopher Vanderhook on dates in March–May 2026 (examples: 5,000 shares on 05/19/2026 and 2,920 shares on 03/19/2026). The filing identifies the security as Class A Common Stock traded on NASDAQ.

Insights

Securities Compliance Analyst

Form 144 lists proposed resales and recent dispositions of Class A Common Stock by an insider.

The submission records a grant of 16,199 restricted stock units under an incentive plan and multiple reported sales by Christopher Vanderhook across March–May 2026. The entries follow the short‑form disclosure pattern required under Rule 144 for restricted or control securities.

Cash‑flow treatment and aggregate proceeds are shown per transaction lines; the filing does not state any conditions such as holder limits or additional transfer restrictions beyond the Rule 144 notice language. Subsequent filings may disclose further transfers or confirmations.

Key Figures

Restricted stock units awarded: 16,199 units Sale example: 5,000 shares Sale example: 2,920 shares

3 metrics

Restricted stock units awarded 16,199 units awarded under incentive award plan

Sale example 5,000 shares sale by Christopher Vanderhook on 05/19/2026

Sale example 2,920 shares sale by Christopher Vanderhook on 03/19/2026

Key Terms

restricted stock units, Form 144, Rule 144 resale

3 terms

restricted stock units financial

"Restricted stock units awarded under incentive award plan"

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.

Form 144 regulatory

"144: Securities Sold During The Past 3 Months"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Rule 144 resale regulatory

"Securities To Be Sold | Restricted stock units awarded under incentive award plan"

FAQ

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

What does DSP's Form 144 disclose about recent insider sales?

The Form 144 lists multiple sales by Christopher Vanderhook in March–May 2026, including transactions of 5,000 shares on 05/19/2026. Each sale line shows the share count and gross proceeds for that trade.

How many restricted stock units are noted in the filing for DSP?

The filing records 16,199 restricted stock units awarded under an incentive award plan. That award is listed separately from the resale transaction lines in the Form 144.

Which security and market are identified in the Form 144 for DSP?

The filing identifies Class A Common Stock as the security and lists NASDAQ as the exchange. The Form 144 covers resale notice and past sales of that class.

Does the Form 144 show who sold the shares for DSP?

Yes. The transaction lines name Christopher Vanderhook with an address and list individual sale dates and share counts, making him the reported seller in the provided excerpt.

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

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Accepted by SEC EDGAR 06/12/2026 - 05:36 PM EDT Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001843104
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	9498618888
Name of Person for Whose Account the Securities are To Be Sold	Christopher Vanderhook
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
Relationship to Issuer	Director

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
Class A Common Stock	Morgan Stanley Smith Barney One New York Plaza, 8th Floor New York NY 10004	9500	114855	20080982	06/12/2026	NASDAQ

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 *
Class A Common Stock	06/10/2026	Restricted stock units awarded under incentive award plan	Issuer			16199	03/15/2024	Compensation

* 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
Christopher Vanderhook 2722 Michelson Drive Suite 100 Irvine CA 92612	Class A Common Stock	05/19/2026	5000	54436
Christopher Vanderhook 2722 Michelson Drive Suite 100 Irvine CA 92612	Class A Common Stock	05/20/2026	5000	52978
Christopher Vanderhook 2722 Michelson Drive Suite 100 Irvine CA 92612	Class A Common Stock	05/21/2026	2500	26971.25
Christopher Vanderhook 2722 Michelson Drive Suite 100 Irvine CA 92612	Class A Common Stock	04/20/2026	5000	55599
Christopher Vanderhook 2722 Michelson Drive Suite 100 Irvine CA 92612	Class A Common Stock	04/21/2026	4704	51342.75
Christopher Vanderhook 2722 Michelson Drive Suite 100 Irvine CA 92612	Class A Common Stock	04/22/2026	2796	30039.11
Christopher Vanderhook 2722 Michelson Drive Suite 100 Irvine CA 92612	Class A Common Stock	03/17/2026	5000	58979.5
Christopher Vanderhook 2722 Michelson Drive Suite 100 Irvine CA 92612	Class A Common Stock	03/18/2026	5000	59993
Christopher Vanderhook 2722 Michelson Drive Suite 100 Irvine CA 92612	Class A Common Stock	03/19/2026	2920	33354.87

144: Remarks and Signature

Remarks
Date of Notice	06/12/2026
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	/s/ Lawrence Madden, Power-of-Attorney
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)