InsiderSource
MGNI

MAGNITE, INC.

SEC CIK 1595974
$16.25 +36.4% · 90 days
90-day buys
$0
0 open-market
90-day sells
$168.5K
1 open-market
Net insider flow
−$168.5K
Net selling
Filings shown
23
Most recent
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At a glance

Over the last 90 days, insiders at MGNI have sold a net $168.5K of stock (0 open-market buys vs 1 sell).

Largest recent trade: Barrett Michael G. sold $6M of MGNI, trimming their stake 46%.

Most active filer: Barrett Michael G., with 22 transactions among the recent filings shown.

Insider transaction history

Form 4 filings for MGNI, newest first
View on SEC EDGAR ↗
MGNI
MAGNITE, INC.
Sell PEARSON DAVID T. · Director · Open-market sale · filed 5d ago ΔOwn −12%

Pearson David T. sold $168.5K of MGNI, trimming their stake 12%.

−$168.5K
10,766 sh @ $16
MGNI
MAGNITE, INC.
Sell BARRETT MICHAEL G. · Director, CEO · Open-market sale · filed Aug 20, 2025 ΔOwn −13%

Barrett Michael G. sold $857.4K of MGNI, trimming their stake 13%.

−$857.4K
35,951 sh @ $24
MGNI
MAGNITE, INC.
Sell BARRETT MICHAEL G. · Director, CEO · Open-market sale · filed Jul 17, 2025 ΔOwn −20%

Barrett Michael G. sold $1.65M of MGNI, trimming their stake 20%.

−$1.65M
70,900 sh @ $23
MGNI
MAGNITE, INC.
Sell BARRETT MICHAEL G. · Director, CEO · Open-market sale · filed Jun 26, 2025 ΔOwn −46%

Barrett Michael G. sold $6M of MGNI, trimming their stake 46%.

−$6M
300,000 sh @ $20
MGNI
MAGNITE, INC.
Sell BARRETT MICHAEL G. · Director, CEO · Open-market sale · filed Jun 18, 2025 ΔOwn −4.4%

Barrett Michael G. sold $570K of MGNI, trimming their stake 4%.

−$570K
30,000 sh @ $19
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MGNI
MAGNITE, INC.
Sell BARRETT MICHAEL G. · Director, CEO · Open-market sale · filed Jun 18, 2025 ΔOwn −6.1%

Barrett Michael G. sold $799.2K of MGNI, trimming their stake 6%.

−$799.2K
45,000 sh @ $18
MGNI
MAGNITE, INC.
Sell BARRETT MICHAEL G. · Director, CEO · Open-market sale · filed Dec 6, 2024 ΔOwn −19%

Barrett Michael G. sold $2.59M of MGNI, trimming their stake 19%.

−$2.59M
147,996 sh @ $18
MGNI
MAGNITE, INC.
Sell BARRETT MICHAEL G. · Director, CEO · Open-market sale · filed Nov 27, 2024 ΔOwn −3.3%

Barrett Michael G. sold $476.1K of MGNI, trimming their stake 3%.

−$476.1K
27,004 sh @ $18
MGNI
MAGNITE, INC.
Sell BARRETT MICHAEL G. · Director, CEO · Open-market sale · filed Nov 19, 2024 ΔOwn −11%

Barrett Michael G. sold $1.61M of MGNI, trimming their stake 11%.

−$1.61M
100,000 sh @ $16
MGNI
MAGNITE, INC.
Sell BARRETT MICHAEL G. · Director, CEO · Open-market sale · filed Nov 13, 2024 ΔOwn −2.6%

Barrett Michael G. sold $375K of MGNI, trimming their stake 3%.

−$375K
25,000 sh @ $15
MGNI
MAGNITE, INC.
Sell BARRETT MICHAEL G. · Director, CEO · Open-market sale · filed Aug 16, 2024 ΔOwn −7.4%

Barrett Michael G. sold $947.3K of MGNI, trimming their stake 7%.

−$947.3K
75,000 sh @ $13
MGNI
MAGNITE, INC.
Sell BARRETT MICHAEL G. · Director, CEO · Open-market sale · filed Jul 17, 2024 ΔOwn −8.7%

Barrett Michael G. sold $1.5M of MGNI, trimming their stake 9%.

−$1.5M
100,000 sh @ $15
MGNI
MAGNITE, INC.
Sell BARRETT MICHAEL G. · Director, CEO · Open-market sale · filed May 17, 2024 ΔOwn −6.1%

Barrett Michael G. sold $676.5K of MGNI, trimming their stake 6%.

−$676.5K
75,000 sh @ $9
MGNI
MAGNITE, INC.
Sell BARRETT MICHAEL G. · Director, CEO · Open-market sale · filed Mar 18, 2024 ΔOwn −5.7%

Barrett Michael G. sold $840.8K of MGNI, trimming their stake 6%.

−$840.8K
75,000 sh @ $11
MGNI
MAGNITE, INC.
Sell BARRETT MICHAEL G. · Director, CEO · Open-market sale · filed Nov 17, 2023 ΔOwn −5.8%

Barrett Michael G. sold $585K of MGNI, trimming their stake 6%.

−$585K
75,000 sh @ $8
MGNI
MAGNITE, INC.
Sell BARRETT MICHAEL G. · Director, CEO · Open-market sale · filed Aug 18, 2023 ΔOwn −2.7%

Barrett Michael G. sold $298.1K of MGNI, trimming their stake 3%.

−$298.1K
35,869 sh @ $8
MGNI
MAGNITE, INC.
Sell BARRETT MICHAEL G. · Director, CEO · Open-market sale · filed Aug 17, 2023 ΔOwn −5.3%

Barrett Michael G. sold $639K of MGNI, trimming their stake 5%.

−$639K
75,000 sh @ $9
MGNI
MAGNITE, INC.
Sell BARRETT MICHAEL G. · Director, CEO · Open-market sale · filed Jul 13, 2023 ΔOwn −1.7%

Barrett Michael G. sold $375.5K of MGNI, trimming their stake 2%.

−$375.5K
25,000 sh @ $15
MGNI
MAGNITE, INC.
Sell BARRETT MICHAEL G. · Director, CEO · Open-market sale · filed Jun 2, 2023 ΔOwn −5.0%

Barrett Michael G. sold $876.8K of MGNI, trimming their stake 5%.

−$876.8K
75,000 sh @ $12
MGNI
MAGNITE, INC.
Sell BARRETT MICHAEL G. · Director, CEO · Open-market sale · filed May 18, 2023 ΔOwn −1.6%

Barrett Michael G. sold $268.5K of MGNI, trimming their stake 2%.

−$268.5K
24,679 sh @ $11
MGNI
MAGNITE, INC.
Sell BARRETT MICHAEL G. · Director, CEO · Open-market sale · filed Mar 17, 2023 ΔOwn −4.9%

Barrett Michael G. sold $629.3K of MGNI, trimming their stake 5%.

−$629.3K
75,000 sh @ $8
MGNI
MAGNITE, INC.
Sell BARRETT MICHAEL G. · Director, CEO · Open-market sale · filed Nov 17, 2022 ΔOwn −4.5%

Barrett Michael G. sold $782.9K of MGNI, trimming their stake 5%.

−$782.9K
67,786 sh @ $12
MGNI
MAGNITE, INC.
Sell BARRETT MICHAEL G. · Director, CEO · Open-market sale · filed Nov 17, 2022 ΔOwn −0.5%

Barrett Michael G. sold $85.6K of MGNI, trimming their stake 1%.

−$85.6K
7,214 sh @ $12
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About MGNI insider activity

This page tracks every recent Form 4 filed for MAGNITE, INC. with the U.S. Securities and Exchange Commission. Form 4 is the disclosure that company insiders — officers, directors, and holders of more than 10% of the stock — must file within two business days of buying or selling shares.

The summary above nets open-market purchases against open-market sales over the trailing 90 days. Open-market trades (codes P and S) tend to carry the most signal because they reflect a deliberate choice to put money in or take it out, as opposed to routine grants, option exercises, or tax-withholding events. Use the badges on each row to tell them apart, and always confirm details against the original filing before drawing conclusions.

Frequently asked questions

How often is MGNI insider data updated?

Continuously. We read from SEC EDGAR, so new Form 4 filings for MAGNITE, INC. usually appear here within minutes of being accepted by the SEC.

What does "net insider flow" mean?

It is the total dollar value of open-market insider purchases minus open-market sales over the last 90 days. A positive number (green) means insiders bought more than they sold; a negative number (red) means the reverse.

Why do some rows show grants or option exercises instead of buys?

Insiders receive stock through compensation as well as buying it outright. Form 4 captures all of these. We label each transaction by its SEC code so you can focus on open-market activity if you prefer.

Is this investment advice?

No. InsiderSource presents public filing data for informational purposes only. Insider activity is one of many factors to consider and is never a recommendation to buy or sell.