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Magnite ($MGNI) Insider Trading & Smart Money Activity

Magnite, Inc. · Advertising Agencies · Latest filing Oct 12, 2026

Magnite, Inc. ($MGNI) has 16 insider trades on file. In the last 12 months on the open market, no insider bought and 5 insiders sold ($3.67M), net -$3.67M.

Insider buyers (12 mo)
0
Insider sellers (12 mo)
5
Net insider $ (12 mo)
-$3.67M
Congress trades (12 mo)
0
13F moves on file
0
Analyst ratings on file
0

MGNI insider buying and selling by quarter

QuarterInsider buysInsider salesCongress buys / sales13F added / cut
Q1 2026 0 0 0 / 0 0 / 0
Q2 2026 0 7 · $2.17M 0 / 0 0 / 0
Q3 2026 0 2 · $1.18M 0 / 0 0 / 0
Q4 2026 0 1 · $316.12K 0 / 0 0 / 0

Insider buys and sales count open-market trades only (Form 4 codes P and S). Grants, option exercises and tax withholding are left out.

All MGNI insider, congress, 13F and analyst activity

DateSourceWhoActionSharesValue / amount ΔOwn1W1M6MFilingStory
Insider Caine PaulDirector Sell (Open-market sale) 10b5-1 12.50K sh $316.12K Read
Insider Knopper Douglas SDirector Sell (Open-market sale) 10b5-1 37.34K sh $981.22K -6.1% —
Insider Caine PaulDirector Sell (Open-market sale) 10b5-1 7.50K sh $198.75K -6.1% —
Insider David BuonaseraCHIEF TECHNOLOGY OFFICER Sell (Open-market sale) 10b5-1 1.41K sh $26.77K +0.3%+4.2% —
Insider David BuonaseraCHIEF TECHNOLOGY OFFICER Sell (Open-market sale) 10b5-1 1.41K sh $26.77K +0.3%+4.2% —
Insider Buckley Sean PatrickPresident, Revenue & Market Strategy Sell (Open-market sale) 10b5-1 19.23K sh $365.43K +0.3%+4.2% Read
Insider Douglas Knopper Sell (Open-market sale) 10b5-1 37.34K sh $675.80K -3.0%+7.3% —
Insider Douglas Knopper Sell (Open-market sale) 10b5-1 37.34K sh $675.80K -3.0%+7.3% —
Insider David BuonaseraCHIEF TECHNOLOGY OFFICER Sell (Open-market sale) 10b5-1 11.23K sh $202.19K -3.0%+7.3% Read
Insider David BuonaseraCHIEF TECHNOLOGY OFFICER Sell (Open-market sale) 10b5-1 11.23K sh $202.19K -3.0%+7.3% Read
Insider Michael BarrettCEO Sell (Option exercise) 100K sh -3.0%+7.3% —
Insider Michael BarrettCEO Sell (Option exercise) 100K sh -3.0%+7.3% —
Insider Michael BarrettCEO Buy (Option exercise) 100K sh $580K -3.0%+7.3% Read
Insider Michael BarrettCEO Buy (Option exercise) 100K sh $580K -3.0%+7.3% Read
Insider Michael BarrettCEO Buy (Option exercise) 178.60K sh $1.04M +4.2%+22.3% Read
Insider Michael BarrettCEO Buy (Option exercise) 178.60K sh $1.04M +4.2%+22.3% Read

1W / 1M / 6M = how MGNI moved from the trade or filing date.

Insider trading in MGNI: who is buying and selling

InsiderRoleTradesOpen-market netShares heldLast trade
Caine Paul Director 2 -$514.88K Oct 12, 2026
Knopper Douglas S Director 1 -$981.22K Sep 17, 2026
David Buonasera CHIEF TECHNOLOGY OFFICER 4 -$457.93K Jun 17, 2026
Buckley Sean Patrick President, Revenue & Market Strategy 1 -$365.43K Jun 17, 2026
Michael Barrett CEO 6 — Jun 16, 2026
Douglas Knopper 2 -$1.35M Jun 16, 2026

Frequently asked questions

Are MGNI insiders buying or selling?

Over the last 12 months 0 insiders made 0 open-market purchases worth $0 and 5 insiders made 10 open-market sales worth $3.67M, a net -$3.67M.

What is the latest insider trade in MGNI?

Caine Paul, Director filed a sell (open-market sale) of 12.50K sh worth $316.12K on Oct 12, 2026.

Other advertising agencies stocks

All stocks Insider cluster buys Top insider purchases Congress 13F institutions

Data comes from public SEC Form 4 and 13F filings and STOCK Act disclosures. Dates are the trade or filing date reported. This page is for research only and is not investment advice.

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