Zagorski Mark

Director at OneBeacon Insurance Group, Ltd. · on record since Apr 26, 2024
Director at Teads Holding Co. · on record since May 18, 2026
Director at Telaria, Inc. · on record since Aug 15, 2017
Chief Executive Officer at Telaria, Inc. · on record since Aug 15, 2017
President & COO at Rubico Inc. · on record since Apr 3, 2020
Director at DoubleVerify Holdings, Inc. · on record since Apr 3, 2026
Chief Executive Officer at DoubleVerify Holdings, Inc. · on record since Apr 3, 2026

Insider trading activity of Zagorski Mark

Transactions on record: 260; since Jul 12, 2017

Open-market buys: 9; $746.5K

Open-market sells: 0

Companies traded: 5; last filing Oct 2, 2026

Figures computed from official regulatory filings — .

Companies where Zagorski Mark has traded

DoubleVerify Holdings, Inc.221 tx · $7.9M · Oct 2, 2026
Teads Holding Co.1 tx · May 18, 2026
OneBeacon Insurance Group, Ltd.2 tx · Jun 9, 2025
Rubico Inc.6 tx · Apr 3, 2020
Telaria, Inc.30 tx · $614.5K · Apr 3, 2020

Track record of Zagorski Mark

Statistical track record

Free account

Open-market buys: 9

Last buy: May 31, 2025

Win rates, median returns and the proven-insider analysis come with a free account.

Transaction history of Zagorski Mark

Co-insiders of Zagorski Mark

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Src
DoubleVerify Holdings, Inc.Listing on record	Oct 2, 2026	Other	-6,880	13.49 USD	$92.8K	SEC
DoubleVerify Holdings, Inc.Listing on record	Oct 2, 2026	Exercise	13,476	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
DoubleVerify Holdings, Inc.Listing on record	Oct 2, 2026	ExerciseD (derivative)	-13,476	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
DoubleVerify Holdings, Inc.Listing on record	Sep 17, 2026	ExerciseD (derivative)	-15,219	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
DoubleVerify Holdings, Inc.Listing on record	Sep 17, 2026	Other	-3,983	13.50 USD	$53.8K	SEC
DoubleVerify Holdings, Inc.Listing on record	Sep 17, 2026	Exercise	2,757	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
DoubleVerify Holdings, Inc.Listing on record	Sep 17, 2026	Exercise	7,802	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
DoubleVerify Holdings, Inc.Listing on record	Sep 17, 2026	Exercise	15,219	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
DoubleVerify Holdings, Inc.Listing on record	Sep 17, 2026	Exercise	12,122	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
DoubleVerify Holdings, Inc.Listing on record	Sep 17, 2026	Other	-6,189	13.50 USD	$83.6K	SEC
DoubleVerify Holdings, Inc.Listing on record	Sep 17, 2026	ExerciseD (derivative)	-22,919	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
DoubleVerify Holdings, Inc.Listing on record	Sep 17, 2026	Other	-1,408	13.50 USD	$19K	SEC
DoubleVerify Holdings, Inc.Listing on record	Sep 17, 2026	ExerciseD (derivative)	-2,757	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
DoubleVerify Holdings, Inc.Listing on record	Sep 17, 2026	Other	-7,770	13.50 USD	$104.9K	SEC
DoubleVerify Holdings, Inc.Listing on record	Sep 17, 2026	ExerciseD (derivative)	-9,375	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
DoubleVerify Holdings, Inc.Listing on record	Sep 17, 2026	Exercise	22,919	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
DoubleVerify Holdings, Inc.Listing on record	Sep 17, 2026	ExerciseD (derivative)	-12,122	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
DoubleVerify Holdings, Inc.Listing on record	Sep 17, 2026	ExerciseD (derivative)	-7,802	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
DoubleVerify Holdings, Inc.Listing on record	Sep 17, 2026	Other	-11,701	13.50 USD	$158K	SEC
DoubleVerify Holdings, Inc.Listing on record	Jul 1, 2026	Other	-7,453	10.84 USD	$80.8K	SEC
DoubleVerify Holdings, Inc.Listing on record	Jul 1, 2026	ExerciseD (derivative)	-13,476	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
DoubleVerify Holdings, Inc.Listing on record	Jul 1, 2026	Exercise	13,476	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
DoubleVerify Holdings, Inc.Listing on record	Jun 17, 2026	Exercise	2,757	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
DoubleVerify Holdings, Inc.Listing on record	Jun 17, 2026	ExerciseD (derivative)	-2,757	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
DoubleVerify Holdings, Inc.Listing on record	Jun 17, 2026	Exercise	22,919	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC

Company	Filed	Type	Qty	Price	Value · USD	Src
DoubleVerify Holdings, Inc.Listing on record	Oct 2, 2026	Other	-6,880	13.49 USD	$92.8K	SEC
DoubleVerify Holdings, Inc.Listing on record	Oct 2, 2026	Exercise	13,476	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
DoubleVerify Holdings, Inc.Listing on record	Oct 2, 2026	ExerciseD (derivative)	-13,476	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
DoubleVerify Holdings, Inc.Listing on record	Sep 17, 2026	ExerciseD (derivative)	-15,219	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
DoubleVerify Holdings, Inc.Listing on record	Sep 17, 2026	Other	-3,983	13.50 USD	$53.8K	SEC
DoubleVerify Holdings, Inc.Listing on record	Sep 17, 2026	Exercise	2,757	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
DoubleVerify Holdings, Inc.Listing on record	Sep 17, 2026	Exercise	7,802	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
DoubleVerify Holdings, Inc.Listing on record	Sep 17, 2026	Exercise	15,219	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
DoubleVerify Holdings, Inc.Listing on record	Sep 17, 2026	Exercise	12,122	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
DoubleVerify Holdings, Inc.Listing on record	Sep 17, 2026	Other	-6,189	13.50 USD	$83.6K	SEC
DoubleVerify Holdings, Inc.Listing on record	Sep 17, 2026	ExerciseD (derivative)	-22,919	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
DoubleVerify Holdings, Inc.Listing on record	Sep 17, 2026	Other	-1,408	13.50 USD	$19K	SEC
DoubleVerify Holdings, Inc.Listing on record	Sep 17, 2026	ExerciseD (derivative)	-2,757	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
DoubleVerify Holdings, Inc.Listing on record	Sep 17, 2026	Other	-7,770	13.50 USD	$104.9K	SEC
DoubleVerify Holdings, Inc.Listing on record	Sep 17, 2026	ExerciseD (derivative)	-9,375	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
DoubleVerify Holdings, Inc.Listing on record	Sep 17, 2026	Exercise	22,919	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
DoubleVerify Holdings, Inc.Listing on record	Sep 17, 2026	ExerciseD (derivative)	-12,122	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
DoubleVerify Holdings, Inc.Listing on record	Sep 17, 2026	ExerciseD (derivative)	-7,802	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
DoubleVerify Holdings, Inc.Listing on record	Sep 17, 2026	Other	-11,701	13.50 USD	$158K	SEC
DoubleVerify Holdings, Inc.Listing on record	Jul 1, 2026	Other	-7,453	10.84 USD	$80.8K	SEC
DoubleVerify Holdings, Inc.Listing on record	Jul 1, 2026	ExerciseD (derivative)	-13,476	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
DoubleVerify Holdings, Inc.Listing on record	Jul 1, 2026	Exercise	13,476	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
DoubleVerify Holdings, Inc.Listing on record	Jun 17, 2026	Exercise	2,757	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
DoubleVerify Holdings, Inc.Listing on record	Jun 17, 2026	ExerciseD (derivative)	-2,757	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
DoubleVerify Holdings, Inc.Listing on record	Jun 17, 2026	Exercise	22,919	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC