Form 4 Tracker
MAGNITE, INC.
MGNI

65 insider filings · Latest: Oct 12, 2026

Common Stock Transactions
Txn DateAcceptedInsiderTypeSharesAvg PriceValueShares OwnedFiling
Aug 6, 2026Aug 7 9:09 PMDavid BuonaseraCHIEF TECHNOLOGY OFFICER
Sale
7,649$23.46$179.5K260,836(D)

View →

Aug 6, 2026Aug 7 9:06 PMKatie Seitz EvansPresident, Product & Operations
Sale
20,000$24.00$480.0K496,840(D)

View →

Aug 6, 2026Aug 7 9:00 PMMichael G. BarrettDirector, CEO
Sale
293,968$22.72$6.7M403,074(D)

View →

Aug 6, 2026Aug 6 8:25 PMSEAN BUCKLEY
Proposed Sale
67,179$20.67$1.4M—

View →

Aug 6, 2026Aug 6 8:24 PMDOUGLAS KNOPPER
Proposed Sale
19,128$20.67$395.4K—

View →

Aug 6, 2026Aug 6 8:24 PMKATHERYN EVANS
Proposed Sale
20,000$24.00$480.0K—

View →

Aug 6, 2026Aug 6 8:24 PMDouglas S. Knopper & Abigail L. Knopper TTEES of the Knopper Joint Mgmt Trust 11/15/13
Proposed Sale
18,209$20.67$376.4K—

View →

Aug 6, 2026Aug 6 8:22 PMDAVID BUONASERA
Proposed Sale
7,649$23.46$179.5K—

View →

Aug 6, 2026Aug 6 8:01 PMMICHAEL G BARRETT
Proposed Sale
293,968$22.72$6.7M—

View →

Jul 15, 2026Jul 17 9:00 PMMichael G. BarrettDirector, CEO
Sale
38,596$20.35$785.4K403,074(D)

View →

Jul 15, 2026Jul 15 8:20 PMMICHAEL G BARRETT
Proposed Sale
38,596$20.35$785.5K—

View →

Jul 10, 2026Jul 14 9:50 PMPaul CaineDirector
Sale
5,000$20.64$103.2K162,401(D)

View →

Jul 10, 2026Jul 10 8:34 PMPAUL CAINE
Proposed Sale
15,000$21.22$318.3K—

View →

Jul 7, 2026Jul 9 8:32 PMDavid BuonaseraCHIEF TECHNOLOGY OFFICER
Sale
1,224$21.00$25.7K268,485(D)

View →

Jul 7, 2026Jul 9 8:27 PMSean Patrick BuckleyPresident, Revenue & Market Strategy
Sale
19,233$21.03$404.5K354,281(D)

View →

Jul 7, 2026Jul 7 8:36 PMSEAN BUCKLEY
Proposed Sale
19,233$20.84$400.8K—

View →

Jul 7, 2026Jul 7 8:14 PMADAM L SOROCA
Proposed Sale
8,000$21.00$168.0K—

View →

Jul 7, 2026Jul 7 8:03 PMDAVID BUONASERA
Proposed Sale
1,224$21.00$25.7K—

View →

Jul 1, 2026Jul 2 11:07 PMDavid BuonaseraCHIEF TECHNOLOGY OFFICER
Sale
9,376$20.00$187.5K269,709(D)

View →

Jun 29, 2026Jul 1 8:49 PMMichael G. BarrettDirector, CEO
Sale
75,000$19.50$1.5M403,074(D)

View →

Stock Options & Derivatives
Txn DateAcceptedInsiderTypeSharesExercise PriceShares OwnedFiling
Sep 14, 2026Sep 16 8:20 PMRobert F SpillaneDirector
Option Exercise
10,363$5.170(D)

View →

Sep 8, 2026Sep 10 8:39 PMKatie Seitz EvansPresident, Product & Operations
Option Exercise
13,546$5.160(D)

View →

Aug 6, 2026Aug 7 9:14 PMSean Patrick BuckleyPresident, Revenue & Market Strategy
Option Exercise
28,703$13.9057,405(D)

View →

Aug 6, 2026Aug 7 9:06 PMKatie Seitz EvansPresident, Product & Operations
Option Exercise
20,000$5.160(D)

View →

Aug 6, 2026Aug 7 9:00 PMMichael G. BarrettDirector, CEO
Option Exercise
293,968$5.800(D)

View →

Jul 15, 2026Jul 17 9:00 PMMichael G. BarrettDirector, CEO
Option Exercise
38,596$5.80293,968(D)

View →

Jun 29, 2026Jul 1 8:49 PMMichael G. BarrettDirector, CEO
Option Exercise
75,000$5.80332,564(D)

View →

Jun 16, 2026Jun 17 10:44 PMMichael G. BarrettDirector, CEO
Option Exercise
100,000$5.80407,564(D)

View →

Jun 15, 2026Jun 17 10:44 PMMichael G. BarrettDirector, CEO
Option Exercise
178,596$5.80507,564(D)

View →