Douglas S Knopper insider trades: Magnite (MGNI) stock sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Douglas reports to the SEC
Open-market buys and sales
6 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Sep 17, 2026 | MGNI | ↓ Sell | 37,337 | $26.28 | $981K | Direct | Sep 18, 2026 (1d) |
| Aug 6, 2026 | MGNI | ↓ Sell | 37,337 | $22.72 | $848K | Direct | Aug 7, 2026 (1d) |
| Jun 16, 2026 | MGNI | ↓ Sell | 37,337 | $18.10 | $676K | Direct | Jun 17, 2026 (1d) |
| Jun 10, 2026 | MGNI | ↓ Sell | 10,766 | $15.73 | $169K | Direct | Jun 10, 2026 (0d) |
| Jul 9, 2021 | MGNI | ↓ Sell | 10,200 | $32.79 | $334K | Direct | Jul 13, 2021 (4d) |
| Apr 5, 2021 | MGNI | ↓ Sell | 10,000 | $40.08 | $401K | Direct | Apr 7, 2021 (2d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other MGNI insiders
Open-market trades in the last 12 months
About Douglas S Knopper's insider trades
Douglas S Knopper is a director at Magnite (MGNI). Since Apr 5, 2021, Douglas has reported no open-market purchases and 6 sales worth $3.4M on SEC Form 4. In the last 12 months: 4 sales ($2.7M).
Their filings also include grants and awards (14 filings), option exercises (2 filings), shares returned to the company (1 filing). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every MGNI insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.