Insider · CIK 0001865116

Sean Patrick Buckley

Files at: MGNI. On EDGAR ↗

Period1M 3M 6M 1Y 2Y All datashares as filed — not split-adjusted

Open-market buys & salesbuys $0 · 0sales $2.7M · 4net −$2.7M

Reported trades — common stock

Trade	Reported (ET)	Company	Shares	Avg price	Total	Owned after	Δ stake	Flags
Aug 17, 2026 SForm 4 →	Aug 18, 4:14 pm EDT	MAGNITE, INC.MGNI	11,030	$24.48	$270,043	293,060	−3.63%	10b5-1
Aug 15, 2026 FForm 4 →	Aug 18, 4:14 pm EDT	MAGNITE, INC.MGNI	11,715	$24.73	$289,712	304,090	—	10b5-1
Aug 6, 2026 SForm 4 →	Aug 7, 5:14 pm EDT	MAGNITE, INC.MGNI	67,179	$24.49	$1,645,316	315,805	−17.5%	10b5-1
Aug 6, 2026 MForm 4 →	Aug 7, 5:14 pm EDT	MAGNITE, INC.MGNI	28,703	$13.90	$398,972	382,984	—	10b5-1
Jul 7, 2026 SForm 4 →	Jul 9, 4:27 pm EDT	MAGNITE, INC.MGNI	19,233	$21.03	$404,470	354,281	−5.15%	10b5-1
Jun 17, 2026 SForm 4 →	Jun 18, 7:51 pm EDT	MAGNITE, INC.MGNI	19,233	$19.00	$365,427	373,514	−4.90%	10b5-1

Reported trades — derivatives (options, RSUs, warrants)

Trade	Reported (ET)	Company	Shares	Avg price	Total	Owned after	Δ stake	Flags
Aug 6, 2026 MForm 4 →	Aug 7, 5:14 pm EDT	MAGNITE, INC.MGNI	28,703	—	—	57,405	—	10b5-1