James Rossman

Insider

First SEC filing: June 10, 2026 · Latest: June 10, 2026

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Insider at

0 buys (P) 0 sells (S) Net: $0 + 12 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

12 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 8, 2026	MGNI	A	13,798	—	—	107,477 Direct	+14.73%	Acquired	(price as of 2026-08-20)
June 14, 2023	MGNI	A	13,743	—	—	355,795 Direct	+4.02%	Acquired	(price as of 2026-08-20)
June 7, 2022	MGNI	A	16,489	—	—	342,052 Direct	+5.06%	Acquired	(price as of 2026-08-20)
Nov. 4, 2021	MGNI	M	36,066	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Nov. 4, 2021	MGNI	M	36,066	$4.64	$167,346	325,563 Direct	+12.46%	Acquired	406.6% (price as of 2026-08-20)
June 28, 2021	MGNI	A	3,936	—	—	289,497 Direct	+1.38%	Acquired	(price as of 2026-08-20)
April 5, 2021	MGNI	S 10b5-1	451	$43.50	$19,618	285,561 Direct	-0.16%	Disposed	-46.0% (price as of 2026-08-20)
April 5, 2021	MGNI	S 10b5-1	2,630	$42.55	$111,906	286,012 Direct	-0.91%	Disposed	-44.8% (price as of 2026-08-20)
April 5, 2021	MGNI	S 10b5-1	3,562	$41.70	$148,535	288,642 Direct	-1.22%	Disposed	-43.6% (price as of 2026-08-20)
April 5, 2021	MGNI	S 10b5-1	18,357	$40.19	$737,768	292,204 Direct	-5.91%	Disposed	-41.5% (price as of 2026-08-20)
July 28, 2020	MGNI	M	112,087	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
July 28, 2020	MGNI	M	112,087	$3.96	$443,865	310,561 Direct	+56.47%	Acquired	493.6% (price as of 2026-08-20)
July 8, 2020	MGNI	A	18,436	—	—	198,474 Direct	+10.24%	Acquired	(price as of 2026-08-20)
April 1, 2020	MGNI	A	36,066	—	—	36,066 Direct	—	Acquired	(price as of 2026-08-20)
April 1, 2020	MGNI	A	112,087	—	—	112,087 Direct	—	Acquired	(price as of 2026-08-20)
April 1, 2020	MGNI	A	180,038	—	—	180,038 Direct	—	Acquired	(price as of 2026-08-20)

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Options, RSUs and convertible securities reported on Form 4 Table II.

Date	Ticker	Security	Underlying	Exercise price	Expiration	Shares	A/D
Nov. 4, 2021	MGNI	Stock Option (Right to Buy)	Common Stock (36,066)	$4.64	Aug. 6, 2022	36,066	Disposed
July 28, 2020	MGNI	Stock Option (Right to Buy)	Common Stock (112,087)	$3.96	Jan. 19, 2021	112,087	Disposed
April 1, 2020	MGNI	Stock Option (Right to Buy)	Common Stock (36,066)	$4.64	Aug. 6, 2022	36,066	Acquired
April 1, 2020	MGNI	Stock Option (Right to Buy)	Common Stock (112,087)	$3.96	Jan. 19, 2021	112,087	Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).