DSP · Insider Trading

Viant Technology Inc. Class A Common Stock

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Every open-market purchase and sale reported by DSP officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.

Form 4 Filings

most recent

Open-Market Buys

code P

Sales

code S

Reporting Insiders

current holders

DSP — Recent Form 4 Transactions (latest 2026-10-14)

Filed	Insider	Role	Type	Shares	Value
2026-10-14	Larry Madden	Chief Financial Officer	Sell	−20,711	−$272.06K
2026-09-18	Larry Madden	Chief Financial Officer	Sell	−31,644	−$390.02K
2026-09-14	Larry Madden	Chief Financial Officer	F	−24,016	−$305.96K
2026-09-14	Timothy Vanderhook	CEO and Chairman	D	−8,636	−$110.02K
2026-09-14	Christopher Vanderhook	Chief Operating Officer	D	−8,636	−$110.02K
2026-08-13	Larry Madden	Chief Financial Officer	Sell	−27,451	−$358.51K
2026-08-12	Craig Justin Abrahams	Director	A	+39,109	—
2026-07-27	Larry Madden	Chief Financial Officer	Sell	−2,814	−$30.07K
2026-07-23	Christopher Vanderhook	Chief Operating Officer	MIXED	−12,500	−$137.64K
2026-07-23	Capital V LLC	10%+ Owner	MIXED	−37,500	−$412.93K
2026-07-23	Timothy Vanderhook	CEO and Chairman	MIXED	−12,500	−$137.64K
2026-07-08	Larry Madden	Chief Financial Officer	Sell	−30,519	−$389.77K
2026-06-18	Christopher Vanderhook	Chief Operating Officer	MIXED	−12,500	−$138.71K
2026-06-18	Timothy Vanderhook	CEO and Chairman	MIXED	−12,500	−$138.71K
2026-06-18	Capital V LLC	10%+ Owner	MIXED	−37,500	−$416.13K
2026-06-15	Larry Madden	Chief Financial Officer	Sell	−25,376	−$281.67K
2026-06-15	Timothy Vanderhook	CEO and Chairman	Sell	−9,125	−$101.29K
2026-06-15	Christopher Vanderhook	Chief Operating Officer	Sell	−9,125	−$101.29K
2026-06-10	Brett Wilson	Director	A	+14,544	—
2026-06-10	Vivian Yang	Director	A	+14,544	—
2026-06-10	Max O Valdes	Director	Sell	−6,686	−$80.46K
2026-06-10	Christopher Vanderhook	Chief Operating Officer	MIXED	—	—
2026-06-10	Timothy Vanderhook	CEO and Chairman	MIXED	—	—
2026-06-08	Larry Madden	Chief Financial Officer	Sell	−33,333	−$405.96K
2026-06-05	Max O Valdes	Director	A	+15,948	—
2026-06-05	Brett Wilson	Director	A	+15,948	—
2026-06-05	Vivian Yang	Director	A	+15,948	—
2026-05-21	Christopher Vanderhook	Chief Operating Officer	MIXED	−12,500	−$134.39K
2026-05-21	Capital V LLC	10%+ Owner	MIXED	−37,500	−$403.16K
2026-05-21	Timothy Vanderhook	CEO and Chairman	MIXED	−12,500	−$134.39K
2026-05-12	Larry Madden	Chief Financial Officer	Sell	−35,835	−$417.24K
2026-04-23	Larry Madden	Chief Financial Officer	Sell	−39,328	−$417.24K
2026-04-22	Timothy Vanderhook	CEO and Chairman	MIXED	−12,500	−$136.98K
2026-04-22	Capital V LLC	10%+ Owner	MIXED	−37,500	−$410.94K
2026-04-22	Christopher Vanderhook	Chief Operating Officer	MIXED	−12,500	−$136.98K
2026-04-07	Larry Madden	Chief Financial Officer	Sell	−7,297	−$82.52K
2026-04-03	Larry Madden	Chief Financial Officer	Sell	−17,541	−$194.42K
2026-03-19	Timothy Vanderhook	CEO and Chairman	MIXED	−12,920	−$152.33K
2026-03-19	Christopher Vanderhook	Chief Operating Officer	MIXED	−12,920	−$152.33K
2026-03-19	Capital V LLC	10%+ Owner	MIXED	−38,760	−$456.98K
2026-03-17	Larry Madden	Chief Financial Officer	MIXED	+247,600	−$21.61K
2026-03-12	Larry Madden	Chief Financial Officer	F	−35,289	−$370.53K
2026-03-12	Christopher Vanderhook	Chief Operating Officer	D	−44,177	−$463.86K
2026-03-12	Timothy Vanderhook	CEO and Chairman	D	−44,177	−$463.86K
2026-02-19	Christopher Vanderhook	Chief Operating Officer	MIXED	−12,080	−$111.24K
2026-02-19	Capital V LLC	10%+ Owner	MIXED	−36,240	−$333.71K
2026-02-19	Timothy Vanderhook	CEO and Chairman	MIXED	−12,080	−$111.24K
2026-01-26	Larry Madden	Chief Financial Officer	Sell	−4,224	−$55.29K
2026-01-22	Capital V LLC	10%+ Owner	MIXED	−37,500	−$459.39K
2026-01-22	Timothy Vanderhook	CEO and Chairman	MIXED	−12,500	−$153.13K

DSP — Current Insider Holders

Insider	Role	Shares Held	Value
Timothy Vanderhook	CEO and Chairman	9,270,019	$124.68M
Larry Madden	Chief Financial Officer	796,356	$10.71M
Christopher Vanderhook	Chief Operating Officer	285,244	$3.84M
Vivian Yang	Director	108,457	$1.46M
Brett Wilson	Director	50,463	$678.73K
Max O Valdes	Director	32,835	$441.63K
Craig Justin Abrahams	Director	28,389	$381.83K
Capital V LLC	10%+ Owner	12,912	$173.67K

DSP Insider Trading FAQ

Who are the insiders at DSP?

8 officers, directors and 10%+ beneficial owners currently report holdings in DSP via SEC Form 4.

Are DSP insiders buying or selling?

Across the 50 most recent Form 4 filings for DSP, 0 were open-market purchases (code P) and 15 were sales (code S). Sales frequently reflect scheduled 10b5-1 plans or tax withholding rather than a view on the stock.

How current is DSP insider data?

Form 4 must be filed within two business days of the transaction, so this is close to real time. The most recent DSP filing is dated 2026-10-14.

How to read Form 4 activity

Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.

Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.

Full filing history and per-insider positions are on the DSP quote page; the site-wide leaderboard is on the insider transactions hub.