MGNI

MAGNITE, INC.

Latest Form 4:Sale$308KbyGephart Brian (CHIEF ACCOUNTING OFFICER) · filed Aug 12, 2026

MAGNITE, INC. (MGNI) has 60 SEC Form 4 filings (84 transaction rows) in the rolling window, disclosed by 11 distinct insiders. Most recent filing: Aug 14, 2026.

The most active filer is CHIEF TECHNOLOGY OFFICER Buonasera David with 7 filings. Insiders have net sold $20.2M over the trailing 6 months.

  • Industry:Advertising Agencies
  • CEO:Michael G. Barrett
  • Employees:905
  • HQ:New York City, NY, US
  • IPO:2014-04-02

Insider Buying

$0

reported purchases (SEC code P)

Insider Selling

$20.5M

reported sales (SEC code S)

Unique Insiders

11

in the rolling window

Market Cap

$3.5B

latest known value

Source
Gephart BrianFirst filing
Sale$308KAug 12SEC ↗
Lam RachelFirst filing
Sale$242KAug 12SEC ↗
Sale$122KAug 12SEC ↗
Sale$1.6MAug 7SEC ↗
Sale$6.7MAug 7SEC ↗
Evans Katie SeitzFirst filing
Sale$480KAug 7SEC ↗
Sale$848KAug 7SEC ↗
Sale$179KAug 7SEC ↗
Sale$785KJul 17SEC ↗
Caine PaulFirst filing
Sale$103KJul 14SEC ↗
Sale$404KJul 9SEC ↗
Sale$26KJul 9SEC ↗
Sale$188KJul 2SEC ↗
Sale$1.5MJul 1SEC ↗
Sale$365KJun 18SEC ↗
Sale$676KJun 17SEC ↗
Sale$18KJun 17SEC ↗
Sale$202KJun 17SEC ↗
Sale$27KJun 17SEC ↗
BARRETT MICHAEL G.First filing
Sale$3.0MJun 17SEC ↗
BARRETT MICHAEL G.First filing
Sale$1.8MJun 17SEC ↗
Knopper Douglas SFirst filing
Sale$169KJun 11SEC ↗
PEARSON DAVID T.First filing
Sale$168KJun 11SEC ↗
Buonasera DavidFirst filing
Sale$21KJun 3SEC ↗
Spillane Robert FFirst filing
Sale$133KMay 21SEC ↗
Sale$258KFeb 18SEC ↗
Soroca Adam LeeFirst filing
Sale$283KDec 19SEC ↗

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MAGNITE, INC. is in the Services sector.