Skip to main content

Magnite, Inc.

MGNI
Exchange
Nasdaq
Industry
Services-Computer Programming, Data Processing, Etc.
SEC CIK
0001595974

In the last 90 days, Magnite, Inc. insiders filed 0 open-market purchases and 26 sales; 311 institutions reported holding it in 13F filings for Q2 2026, worth $2.69B in total; no superinvestor holds it.

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by Magnite, Inc. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
0 filings
Open-market sells
26 filings
11 insiders, $19.1M in total
Insiders trading
11
Net value
−$19.1M
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for Magnite, Inc., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for Magnite, Inc.
NameTitleLast reported holdingLast filingFilings, past year
Caine PaulDirector137,401Sep 18, 20267
Knopper Douglas SDirector51,136Sep 18, 20264
Buonasera DavidCHIEF TECHNOLOGY OFFICER245,155Sep 16, 202613
Spillane Robert FDirector57,715Sep 16, 20264
Evans Katie SeitzSee Remarks441,800Sep 11, 20269
Saltz AaronCHIEF LEGAL OFFICER224,389Sep 11, 20267
Harden Sarah PatriciaDirector114,751Aug 28, 20262
Gephart BrianCHIEF ACCOUNTING OFFICER102,328Aug 18, 20266
Barrett Michael G.CEO392,670Aug 18, 202610
Day DavidCHIEF FINANCIAL OFFICER452,861Aug 18, 20267
Buckley Sean PatrickSee Remarks293,060Aug 18, 202610
Lam RachelDirector230,620Aug 12, 20262
Rossman JamesDirector107,477Jun 10, 20261
Pearson David T.Director79,001Jun 10, 20261
Yu DianeDirector81,279Jun 10, 20261
Soroca Adam LeeCHIEF PRODUCT OFFICER388,425Feb 18, 20265
Frankenberg Robert JDirector119,090Jun 16, 20230
Troe Lisa LDirector114,218Jun 12, 20230
Dove James AllenChief Technology Officer191,071Aug 17, 20220
Prusz Joseph RChief Revenue Officer, DV+311,083Feb 16, 20220

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Aug 29, 2025 (view filing)Aug 272 daysEvans Katie SeitzPresident, OperationsSSale−21.5K$25.52−$548.9K−5.2%394.1K after
Aug 27, 2025 (view filing)Aug 261 dayYu DianeDirectorSSale−20.0K$25.23−$504.6K−22.9%67.5K after
Aug 26, 2025 (view filing)Aug 251 dayCaine PaulDirectorSSale−7.50K$25.00−$187.5K−4.2%171.1K after10b5-1
Aug 26, 2025 (view filing)Aug 251 dayEvans Katie SeitzPresident, OperationsSSale−8.35K$26.00−$217.0K−2.0%415.6K after10b5-1
Aug 20, 2025 (view filing)Aug 182 daysDay DavidCHIEF FINANCIAL OFFICERSSale−13.4K$23.85−$318.8K−3.4%382.1K after
Aug 20, 2025 (view filing)Aug 182 daysEvans Katie SeitzPresident, OperationsSSale−10.5K$23.85−$250.1K−2.4%423.9K after
Aug 20, 2025 (view filing)Aug 182 daysSaltz AaronCHIEF LEGAL OFFICERSSale−5.77K$23.85−$137.6K−2.3%242.2K after
Aug 20, 2025 (view filing)Aug 18-192 daysBuckley Sean PatrickPresident, RevenueSSale−20.2K$23.65−$477.8K−5.8%327.2K after2 lots10b5-1
Aug 20, 2025 (view filing)Aug 182 daysBuonasera DavidCHIEF TECHNOLOGY OFFICERSSale−7.83K$23.85−$186.8K−3.1%241.6K after
Aug 20, 2025 (view filing)Aug 182 daysGephart BrianCHIEF ACCOUNTING OFFICERSSale−2.96K$23.85−$70.6K−2.4%120.6K after
Aug 20, 2025 (view filing)Aug 18-192 daysSoroca Adam LeeCHIEF PRODUCT OFFICERSSale−20.3K$23.65−$479.6K−5.5%346.4K after2 lots10b5-1
Aug 20, 2025 (view filing)Aug 182 daysBarrett Michael G.CEOSSale−36.0K$23.85−$857.4K−12.6%249.9K after
Aug 15, 2025 (view filing)Aug 141 daySaltz AaronCHIEF LEGAL OFFICERSSale−13.9K$23.34−$323.5K−5.3%248.0K after
Aug 14, 2025 (view filing)Aug 122 daysLam RachelDirectorSSale−15.0K$22.25−$333.8K−6.2%226.8K after
Aug 13, 2025 (view filing)Aug 112 daysCaine PaulDirectorSSale−5.00K$22.29−$111.5K−2.7%178.6K after10b5-1
Jul 17, 2025 (view filing)Jul 152 daysBarrett Michael G.CEOSSale−70.9K$23.27−$1.65M−19.9%285.8K after10b5-1
Jul 11, 2025 (view filing)Jul 101 dayCaine PaulDirectorSSale−5.00K$23.53−$117.7K−2.7%183.6K after10b5-1
Jul 8, 2025 (view filing)Jul 35 daysSoroca Adam LeeCHIEF PRODUCT OFFICERSSale−42.6K$25.00−$1.06M−10.4%366.7K after10b5-1
Jul 2, 2025 (view filing)Jun 302 daysEvans Katie SeitzPresident, OperationsSSale−24.5K$23.32−$571.2K−5.3%434.4K after2 lots10b5-1
Jul 2, 2025 (view filing)Jun 302 daysSaltz AaronCHIEF LEGAL OFFICERSSale−17.6K$22.00−$386.6K−6.3%261.8K after10b5-1
Jul 2, 2025 (view filing)Jun 302 daysDay DavidCHIEF FINANCIAL OFFICERSSale−21.7K$22.00−$477.0K−4.9%421.8K after10b5-1
Jul 2, 2025 (view filing)Jun 302 daysBuonasera DavidCHIEF TECHNOLOGY OFFICERSSale−9.29K$22.00−$204.4K−3.6%249.4K after10b5-1
Jun 26, 2025 (view filing)Jun 242 daysSoroca Adam LeeCHIEF PRODUCT OFFICERSSale−44.5K$20.00−$890.4K−10.0%400.9K after10b5-1
Jun 26, 2025 (view filing)Jun 242 daysCaine PaulDirectorSSale−5.00K$20.00−$100.0K−2.6%188.6K after10b5-1
Jun 26, 2025 (view filing)Jun 242 daysBarrett Michael G.CEOSSale−300.0K$20.01−$6.00M−45.7%356.7K after10b5-1
Jun 26, 2025 (view filing)Jun 24-262 daysDay DavidCHIEF FINANCIAL OFFICERSSale−71.0K$20.46−$1.45M−13.8%443.5K after2 lots10b5-1
Jun 20, 2025 (view filing)Jun 182 daysRossman JamesDirectorSSale−137.0K$18.78−$2.57M−59.4%93.7K after10b5-1
Jun 20, 2025 (view filing)Jun 182 daysDay DavidCHIEF FINANCIAL OFFICERSSale−38.1K$18.95−$722.9K−7.9%443.5K after10b5-1
Jun 18, 2025 (view filing)Jun 162 daysEvans Katie SeitzPresident, OperationsSSale−20.0K$18.50−$370.0K−4.3%442.8K after10b5-1
Jun 18, 2025 (view filing)Jun 162 daysSaltz AaronCHIEF LEGAL OFFICERSSale−16.8K$17.50−$293.8K−5.7%279.4K after10b5-1
Jun 18, 2025 (view filing)Jun 16-182 daysBarrett Michael G.CEOSSale−75.0K$18.26−$1.37M−10.2%656.7K after2 lots10b5-1
Jun 12, 2025 (view filing)Jun 102 daysSpillane Robert FDirectorSSale−15.0K$17.57−$263.6K−18.4%66.4K after
Jun 6, 2025 (view filing)Jun 42 daysSaltz AaronCHIEF LEGAL OFFICERSSale−15.3K$16.71−$256.1K−4.9%296.2K after
Jun 6, 2025 (view filing)Jun 51 dayEvans Katie SeitzPresident, OperationsSSale−35.0K$17.36−$607.6K−7.3%442.8K after10b5-1
Jun 6, 2025 (view filing)Jun 6Same daySoroca Adam LeeCHIEF PRODUCT OFFICERSSale−8.33K$17.70−$147.4K−1.9%437.1K after10b5-1
Jun 6, 2025 (view filing)Jun 6Same dayPearson David T.DirectorSSale−11.5K$17.60−$202.6K−13.2%76.0K after10b5-1
May 28, 2025 (view filing)May 23-275 daysBuonasera DavidCHIEF TECHNOLOGY OFFICERSSale−12.4K$15.71−$194.8K−4.6%258.7K after2 lots10b5-1
May 22, 2025 (view filing)May 202 daysSoroca Adam LeeCHIEF PRODUCT OFFICERSSale−8.33K$17.00−$141.6K−1.9%437.1K after10b5-1
May 16, 2025 (view filing)May 16Same daySoroca Adam LeeCHIEF PRODUCT OFFICERSSale−11.4K$15.73−$178.8K−2.5%437.1K after10b5-1
May 16, 2025 (view filing)May 16Same dayBuckley Sean PatrickPresident, RevenueSSale−9.69K$15.73−$152.5K−2.7%347.4K after10b5-1
May 14, 2025 (view filing)May 122 daysGephart BrianCHIEF ACCOUNTING OFFICERSSale−6.33K$16.16−$102.4K−4.8%126.6K after
Mar 5, 2025 (view filing)Mar 32 daysGephart BrianCHIEF ACCOUNTING OFFICERSSale−6.25K$16.00−$100.0K−4.5%132.9K after
Mar 5, 2025 (view filing)Mar 32 daysSoroca Adam LeeCHIEF PRODUCT OFFICERSSale−15.5K$15.75−$244.1K−3.3%458.4K after10b5-1
Feb 21, 2025 (view filing)Feb 192 daysBuckley Sean PatrickPresident, RevenueSSale−10.5K$19.13−$201.4K−2.8%370.6K after10b5-1
Feb 12, 2025 (view filing)Feb 102 daysCaine PaulDirectorSSale−5.00K$20.35−$101.8K−2.7%182.8K after10b5-1
Feb 7, 2025 (view filing)Feb 7Same dayRossman JamesDirectorSSale−149.9K$19.46−$2.92M−40.5%219.9K after10b5-1
Feb 7, 2025 (view filing)Feb 7Same dayBuckley Sean PatrickPresident, RevenueSSale−18.7K$20.00−$373.9K−4.4%408.5K after10b5-1
Feb 7, 2025 (view filing)Feb 7Same dayEvans Katie SeitzPresident, OperationsSSale−12.5K$20.00−$250.4K−2.5%492.1K after10b5-1
Feb 7, 2025 (view filing)Feb 7Same daySaltz AaronCHIEF LEGAL OFFICERSSale−17.9K$19.75−$354.5K−5.1%330.6K after10b5-1
Feb 7, 2025 (view filing)Feb 6-71 dayDay DavidCHIEF FINANCIAL OFFICERSSale−52.2K$19.58−$1.02M−9.7%488.5K after2 lots10b5-1