Knopper Douglas S

Director at MEDIALINK WORLDWIDE INC · on record since Jan 26, 2006
Director at MAGNITE, INC. · on record since Jun 10, 2026
Director at Telaria, Inc. · on record since Oct 19, 2018
Director at Rubico Inc. · on record since Apr 3, 2020

Insider trading activity of Knopper Douglas S

Transactions on record: 31; since Jan 26, 2006

Open-market buys: 0

Open-market sells: 10; $3.4M

Companies traded: 4; last filing Sep 18, 2026

Figures computed from official regulatory filings — .

Companies where Knopper Douglas S has traded

MAGNITE, INC.17 tx · $3.4M · Sep 18, 2026
Rubico Inc.1 tx · Apr 3, 2020
Telaria, Inc.9 tx · Apr 3, 2020
MEDIALINK WORLDWIDE INC4 tx · $67.2K · Jan 6, 2009

Track record of Knopper Douglas S

Insufficient history for a statistical track record (fewer than 5 open-market buys).

Transaction history of Knopper Douglas S

Co-insiders of Knopper Douglas S

BARRETT MICHAEL G.MAGNITE, INC. +2
Caine PaulMAGNITE, INC. +2
Lam RachelMAGNITE, INC. +2
Rossman JamesMAGNITE, INC. +2
Day DavidMAGNITE, INC. +1
Evans Katie SeitzMAGNITE, INC. +1
Filip EveMAGNITE, INC. +1
FRANKENBERG ROBERT JMAGNITE, INC. +1
Harden Sarah PatriciaMAGNITE, INC. +1
Hughes ShawnaMAGNITE, INC. +1
Kershaw ThomasMAGNITE, INC. +1
Prusz Joseph RMAGNITE, INC. +1

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
MAGNITE, INC.Listing on record	Sep 18, 2026	Sell	-37,337	26.28 USD	$981.2K	Unusual size	SEC
MAGNITE, INC.Listing on record	Aug 7, 2026	Sell	-37,337	22.72 USD	$848.3K	Unusual size	SEC
MAGNITE, INC.Listing on record	Jun 17, 2026	Sell	-37,337	18.10 USD	$675.8K	Unusual size	SEC
MAGNITE, INC.Listing on record	Jun 10, 2026	Award	13,798	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MAGNITE, INC.Listing on record	Jun 10, 2026	Sell	-10,766	15.73 USD	$169.3K		SEC
MAGNITE, INC.Listing on record	Jun 6, 2025	Award	10,766	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MAGNITE, INC.Listing on record	Jun 13, 2024	Award	14,061	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MAGNITE, INC.Listing on record	Jun 16, 2023	Award	13,743	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MAGNITE, INC.Listing on record	Jun 9, 2022	Award	16,489	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MAGNITE, INC.Listing on record	Jul 13, 2021	Sell	-9,010	32.68 USD	$294.4K		SEC
MAGNITE, INC.Listing on record	Jul 13, 2021	Sell	-1,190	33.61 USD	$40K		SEC
MAGNITE, INC.Listing on record	Jun 30, 2021	Award	3,936	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MAGNITE, INC.Listing on record	Apr 7, 2021	Sell	-500	42.55 USD	$21.3K		SEC
MAGNITE, INC.Listing on record	Apr 7, 2021	Sell	-4,923	39.55 USD	$194.7K		SEC
MAGNITE, INC.Listing on record	Apr 7, 2021	Sell	-200	41.53 USD	$8.3K		SEC
MAGNITE, INC.Listing on record	Apr 7, 2021	Sell	-4,377	40.32 USD	$176.5K		SEC
MAGNITE, INC.Listing on record	Jul 16, 2020	Award	18,436	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Telaria, Inc.Listing unverified	Apr 3, 2020	Other	-84,757	—	n/a (No price was disclosed in the filing)		SEC
Telaria, Inc.Listing unverified	Apr 3, 2020	OtherD (derivative)	-10,330	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Rubico Inc.Listing unverified	Apr 3, 2020	Award	102,884	—	n/a (No price was disclosed in the filing)		SEC
Telaria, Inc.Listing unverified	Oct 17, 2019	ExerciseD (derivative)	-68,729	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Telaria, Inc.Listing unverified	Oct 17, 2019	Exercise	68,729	—	n/a (No price was disclosed in the filing)		SEC
Telaria, Inc.Listing unverified	Jun 12, 2019	Exercise	16,028	—	n/a (No price was disclosed in the filing)		SEC
Telaria, Inc.Listing unverified	Jun 12, 2019	AwardD (derivative)	10,330	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Telaria, Inc.Listing unverified	Jun 12, 2019	ExerciseD (derivative)	-16,028	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	Signals	Src
MAGNITE, INC.Listing on record	Sep 18, 2026	Sell	-37,337	26.28 USD	$981.2K	Unusual size	SEC
MAGNITE, INC.Listing on record	Aug 7, 2026	Sell	-37,337	22.72 USD	$848.3K	Unusual size	SEC
MAGNITE, INC.Listing on record	Jun 17, 2026	Sell	-37,337	18.10 USD	$675.8K	Unusual size	SEC
MAGNITE, INC.Listing on record	Jun 10, 2026	Award	13,798	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MAGNITE, INC.Listing on record	Jun 10, 2026	Sell	-10,766	15.73 USD	$169.3K		SEC
MAGNITE, INC.Listing on record	Jun 6, 2025	Award	10,766	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MAGNITE, INC.Listing on record	Jun 13, 2024	Award	14,061	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MAGNITE, INC.Listing on record	Jun 16, 2023	Award	13,743	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MAGNITE, INC.Listing on record	Jun 9, 2022	Award	16,489	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MAGNITE, INC.Listing on record	Jul 13, 2021	Sell	-9,010	32.68 USD	$294.4K		SEC
MAGNITE, INC.Listing on record	Jul 13, 2021	Sell	-1,190	33.61 USD	$40K		SEC
MAGNITE, INC.Listing on record	Jun 30, 2021	Award	3,936	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MAGNITE, INC.Listing on record	Apr 7, 2021	Sell	-500	42.55 USD	$21.3K		SEC
MAGNITE, INC.Listing on record	Apr 7, 2021	Sell	-4,923	39.55 USD	$194.7K		SEC
MAGNITE, INC.Listing on record	Apr 7, 2021	Sell	-200	41.53 USD	$8.3K		SEC
MAGNITE, INC.Listing on record	Apr 7, 2021	Sell	-4,377	40.32 USD	$176.5K		SEC
MAGNITE, INC.Listing on record	Jul 16, 2020	Award	18,436	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Telaria, Inc.Listing unverified	Apr 3, 2020	Other	-84,757	—	n/a (No price was disclosed in the filing)		SEC
Telaria, Inc.Listing unverified	Apr 3, 2020	OtherD (derivative)	-10,330	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Rubico Inc.Listing unverified	Apr 3, 2020	Award	102,884	—	n/a (No price was disclosed in the filing)		SEC
Telaria, Inc.Listing unverified	Oct 17, 2019	ExerciseD (derivative)	-68,729	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Telaria, Inc.Listing unverified	Oct 17, 2019	Exercise	68,729	—	n/a (No price was disclosed in the filing)		SEC
Telaria, Inc.Listing unverified	Jun 12, 2019	Exercise	16,028	—	n/a (No price was disclosed in the filing)		SEC
Telaria, Inc.Listing unverified	Jun 12, 2019	AwardD (derivative)	10,330	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Telaria, Inc.Listing unverified	Jun 12, 2019	ExerciseD (derivative)	-16,028	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC