Magnite, Inc. (MGNI) Insider Trading

Over the last 3 months, MGNI insiders made 0 open-market buys and 10 sales, a net sale of -$6.5M (SEC Form 4). Over the last 6 months, 252 institutions increased and 186 reduced their position (13F).

Insider Activity

Sentiment
0/100
Buys (3m)
0
Sells (3m)
10
Net (3m)
-$6.5M
Insider trades by month Buys Sells
Oct
Nov
Dec
Feb
May
Jun
Context3-month price +59.8%Institutions mixed (13F)
DateInsiderTypeSharesPrice
Jun 18, 2026Buckley Sean Patrickofficer: See RemarksSell19,233$19.00
Jun 17, 2026Knopper Douglas SdirectorSell37,337$18.10
Jun 17, 2026BARRETT MICHAEL G.director, officer: CEOOption100,000$5.80
Jun 17, 2026Buonasera Davidofficer: CHIEF TECHNOLOGY OFFICERSell11,233$18.00
Jun 17, 2026Buonasera Davidofficer: CHIEF TECHNOLOGY OFFICERSell1,409$19.00
Jun 17, 2026Buonasera Davidofficer: CHIEF TECHNOLOGY OFFICERSell1,057$17.00
Jun 17, 2026BARRETT MICHAEL G.director, officer: CEOOption178,596$5.80
Jun 17, 2026BARRETT MICHAEL G.director, officer: CEOSell100,000$17.50
Jun 17, 2026BARRETT MICHAEL G.director, officer: CEOSell178,596$16.59
Jun 10, 2026Knopper Douglas SdirectorGrant13,798
Jun 10, 2026Harden Sarah PatriciadirectorGrant13,798
Jun 10, 2026PEARSON DAVID T.directorSell10,766$15.65
Jun 10, 2026Rossman JamesdirectorGrant13,798
Jun 10, 2026Spillane Robert FdirectorGrant13,798
Jun 10, 2026PEARSON DAVID T.directorGrant13,798
Jun 10, 2026Lam RacheldirectorGrant13,798
Jun 10, 2026Caine PauldirectorGrant13,798
Jun 10, 2026Yu DianedirectorGrant13,798
Jun 10, 2026Knopper Douglas SdirectorSell10,766$15.73
May 21, 2026Spillane Robert FdirectorSell10,000$13.33
May 19, 2026Buckley Sean Patrickofficer: President, RevenueTax12,019$12.82
May 19, 2026Buonasera Davidofficer: CHIEF TECHNOLOGY OFFICERTax8,335$12.82
May 19, 2026Gephart Brianofficer: CHIEF ACCOUNTING OFFICERTax3,789$12.82
May 19, 2026Evans Katie Seitzofficer: President, OperationsTax11,204$12.82
May 19, 2026Day Davidofficer: CHIEF FINANCIAL OFFICERTax14,170$12.82
May 19, 2026Saltz Aaronofficer: CHIEF LEGAL OFFICERTax5,627$12.82
May 19, 2026BARRETT MICHAEL G.director, officer: CEOTax10,404$12.82
Feb 18, 2026Day Davidofficer: CHIEF FINANCIAL OFFICERTax30,617$11.70
Feb 18, 2026Buonasera Davidofficer: CHIEF TECHNOLOGY OFFICERTax17,137$11.70
Feb 18, 2026Evans Katie Seitzofficer: President, OperationsTax27,428$11.70

Source: MGNI SEC Form 4 filings, latest Jun 18, 2026. For informational purposes only — not investment advice.

Institutional activity (13F)

How institutions changed their MGNI positions over the last 6 months (SEC Form 13F).

Increased
252
New positions
100
Reduced
186
Sold out
114
Largest moves
InstitutionActionSharesFiled
VANGUARD GROUP INCIncreased14.8MJan 29, 2026
CAPITAL RESEARCH GLOBAL INVESTORSIncreased12.9MFeb 11, 2026
VANGUARD CAPITAL MANAGEMENT LLCNew Position12.4MMay 15, 2026
BLACKROCK, INC.Increased11.7MMay 13, 2026
BLACKROCK, INC.Increased11.6MFeb 12, 2026
WELLINGTON MANAGEMENT GROUP LLPIncreased9.2MMay 15, 2026
WELLINGTON MANAGEMENT GROUP LLPIncreased8.6MFeb 17, 2026
VANGUARD PORTFOLIO MANAGEMENT LLCNew Position7.7MMay 8, 2026
FMR LLCReduced6.7MFeb 17, 2026
AMERICAN CENTURY COMPANIES INCIncreased5.3MFeb 13, 2026
CAPITAL RESEARCH GLOBAL INVESTORSReduced5.0MMay 13, 2026
BOSTON PARTNERSIncreased4.7MMay 11, 2026
AMERICAN CENTURY COMPANIES INCReduced4.6MMay 15, 2026
FMR LLCReduced4.5MMay 15, 2026
BOSTON PARTNERSReduced4.1MFeb 13, 2026

Source: SEC Form 13F filings. For informational purposes only — not investment advice.