Brian Gephart sold $684k of MGNI
CHIEF ACCOUNTING OFFICER at MAGNITE, INC.. 27,671 shares at an average of $24.71, traded Sep 4, 2025, filed Sep 5, 2025.
Score components
- +15RoleOfficer
- +21Trade size$684k at market
- +5Share of holdings soldSold 23% of holdings
- +15Cluster8 insiders selling within 14 days
- -2010b5-1 planPre-scheduled under a 10b5-1 plan
What happened after comparable sells
Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.
Price around the trade, and since
From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™
Rows in this filing
Every transaction in Form 4 0001415889-25-023803, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Sep 4, 2025 | SOpen-market sale Common Stock10b5-1 | -27,671 | $24.71 | $684k | 92,898 | Sep 5, 2025 |
Related signals
Other insiders at MAGNITE, INC. and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| 22Weak | MAGNITE, INC. | Paul Caine director | $199k 7,500 shares | -5% | |
| 45Moderate | MAGNITE, INC. | Douglas S Knopper director | $981k 37,337 shares | -42% | |
| 15Weak | MAGNITE, INC. | David Buonasera CHIEF TECHNOLOGY OFFICER | $28k 1,165 shares | -0% | |
| 33Weak | MAGNITE, INC. | Robert F Spillane director | $246k 10,363 shares | -15% | |
| 20Weak | MAGNITE, INC. | Paul Caine director | $118k 5,000 shares | -3% | |
| 25Weak | MAGNITE, INC. | Katie Seitz Evans See Remarks | $336k 13,997 shares | -3% | |
| 39Weak | MAGNITE, INC. | Aaron Saltz CHIEF LEGAL OFFICER | $936k 40,000 shares | -15% | |
| 20Weak | MAGNITE, INC. | Katie Seitz Evans See Remarks | $1.0M 43,385 shares | -9% | |
| 21Weak | MAGNITE, INC. | David Buonasera CHIEF TECHNOLOGY OFFICER | $152k 6,414 shares | -3% | |
| 25Weak | MAGNITE, INC. | Sean Patrick Buckley See Remarks | $365k 19,233 shares | -5% |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.