MGNICommunication ServicesMid-Cap
MAGNITE, INC. Insider Trading Activity
Every SEC Form 4 insider transaction reported for MAGNITE, INC. (MGNI), sourced directly from SEC EDGAR and updated as new filings are accepted.
By Trabud Research Team · SEC Form 4 & insider trading data analysts
Last updated:
Quick Answer
Are MGNI insiders buying or selling?
MAGNITE, INC. insiders reported 3 open-market buys ($414.4K) and 298 sells ($140.8M) across 301 Form 4 filings — a net selling position of $140.4M.
Source: SEC EDGAR Form 4
Key Statistics (as of Aug 28, 2026)
Total Form 4 filings
301
SEC EDGAR
Insider filers
24
Insider buys (3)
$414.4K
Insider sells (298)
$140.8M
Insider sentiment
Net sellingNet insider flow of $140.4M in net selling.
Recent MGNI insider transactions
| Date | Insider | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 28, 2026 | Sarah Patricia Harden | Director | Sale | 49.0K | $23.57 | $1.2M |
| Aug 18, 2026 | Paul Caine | Director | Sale | 7.5K | $25.00 | $187.5K |
| Aug 18, 2026 | Sean Patrick Buckley | President, Revenue & Market Strategy | Sale | 11.0K | $24.48 | $270.0K |
| Aug 12, 2026 | Brian Gephart | CHIEF ACCOUNTING OFFICER | Sale | 12.5K | $24.68 | $308.0K |
| Aug 12, 2026 | Rachel Lam | Director | Sale | 10.0K | $24.16 | $241.6K |
| Aug 12, 2026 | Paul Caine | Director | Sale | 5.0K | $24.35 | $121.8K |
| Aug 7, 2026 | Sean Patrick Buckley | President, Revenue & Market Strategy | Sale | 67.2K | $24.49 | $1.6M |
| Aug 7, 2026 | Douglas S Knopper | Director | Sale | 37.3K | $22.72 | $848.3K |
| Aug 7, 2026 | David Buonasera | CHIEF TECHNOLOGY OFFICER | Sale | 7.6K | $23.46 | $179.5K |
| Aug 7, 2026 | Katie Seitz Evans | President, Product & Operations | Sale | 20.0K | $24.00 | $480.0K |
| Aug 7, 2026 | Michael G. Barrett | CEO | Sale | 294.0K | $22.72 | $6.7M |
| Jul 17, 2026 | Michael G. Barrett | CEO | Sale | 38.6K | $20.35 | $785.4K |
| Jul 14, 2026 | Paul Caine | Director | Sale | 5.0K | $20.64 | $103.2K |
| Jul 9, 2026 | David Buonasera | CHIEF TECHNOLOGY OFFICER | Sale | 1.2K | $21.00 | $25.7K |
| Jul 9, 2026 | Sean Patrick Buckley | President, Revenue & Market Strategy | Sale | 19.2K | $21.03 | $404.5K |
| Jul 2, 2026 | David Buonasera | CHIEF TECHNOLOGY OFFICER | Sale | 9.4K | $20.00 | $187.5K |
| Jul 1, 2026 | Michael G. Barrett | CEO | Sale | 75.0K | $19.50 | $1.5M |
| Jun 18, 2026 | Sean Patrick Buckley | President, Revenue & Market Strategy | Sale | 19.2K | $19.00 | $365.4K |
| Jun 17, 2026 | Douglas S Knopper | Director | Sale | 37.3K | $18.10 | $675.8K |
| Jun 17, 2026 | David Buonasera | CHIEF TECHNOLOGY OFFICER | Sale | 13.7K | $18.03 | $246.9K |
| Jun 17, 2026 | Michael G. Barrett | CEO | Sale | 278.6K | $16.92 | $4.7M |
| Jun 11, 2026 | Douglas S Knopper | Director | Sale | 10.8K | $15.73 | $169.3K |
| Jun 11, 2026 | David T. Pearson | Director | Sale | 10.8K | $15.65 | $168.5K |
| Jun 3, 2026 | David Buonasera | CHIEF TECHNOLOGY OFFICER | Sale | 1.4K | $15.00 | $21.1K |
| May 21, 2026 | Robert F Spillane | Director | Sale | 10.0K | $13.33 | $133.3K |
Showing the 25 most recent of 301 Form 4 filings for MAGNITE, INC..
Most active MGNI insiders
- Adam Lee Soroca37 filings
- David Day35 filings
- Michael G. Barrett33 filings
- Aaron Saltz25 filings
- Katie Seitz Evans22 filings
Ask anything about MGNI insider activity
Use Trabud's AI agent to query MAGNITE, INC.'s Form 4 history in plain English — "Show me MGNI CEO purchases this year" or compare it against any other ticker.
Open the AI agentMGNI insider trading FAQ
Are MAGNITE, INC. insiders buying or selling?
Across 301 SEC Form 4 filings, MAGNITE, INC. (MGNI) insiders reported 3 open-market purchases totaling $414.4K and 298 sales totaling $140.8M. That is a net selling position of $140.4M.
How many insiders trade MGNI stock?
24 distinct insider filers — officers, directors, 10%+ owners, and investment groups filing jointly — have reported Form 4 transactions for MAGNITE, INC.. The most recent filing was accepted on Aug 28, 2026.
Where does Trabud get MGNI insider trading data?
All MGNI insider trading data comes directly from official SEC EDGAR Form 4 filings, which corporate insiders must submit within two business days of a transaction under Section 16(a) of the Securities Exchange Act of 1934.
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