All stock lists
Magnite, Inc. (NASDAQ:MGNI)
US · Delayed Price · Currency is USD
Communication Services · Advertising Agencies
22.07+0.45 (+2.10%)
Market cap
$3.17B
Insider Score
Health Score
Analyst consensus
Listed since
Apr 2, 2014
Website
Insider Score
––Not scored
MGNI Insider Score
Insiders filed in the last 90 days, but none of those trades qualified for scoring — round-trip buys and filings whose price is far off the market are excluded.
MGNI Stock Insider Trading Activity
MGNI stock’s insider trading shows 17 sales on the open market for an estimated $5.95M by company insiders over the last 6 months.
Not enough price history.
Insider Trading Activity (Form 4 Filings)
An insider trade occurs when an individual that has non-public information about a company buys or sells shares of that company’s stock. Examples of insiders include a company’s executive officers (CEO, CFO, COO), its board of directors, and its major shareholders. Insiders are required to submit their trading activity to the SEC through Form 4 filings.
Scored window · last 90 days0 qualifying buys0 insiders$0 bought— these are the numbers in the rankings table; the full history below shows every filing (buys, sells and older activity).
| Insider | Action | Shares | Avg Cost | Total | Δ Holdings | Held After | Date | Grade | Form 4 |
|---|---|---|---|---|---|---|---|---|---|
| Caine Paul Director | Sell | 12,500 | $25.29 | $316.13K | 9.1% | 124,901 | Oct 12, 2026 | — | Form 4 |
| Sullivan Haas Other | Award | 24,641 | — | — | 33.8% | 97,554 | Oct 1, 2026 | — | Form 4 |
| Gephart Brian CFO | Award | 64,682 | — | — | 63.2% | 167,010 | Oct 1, 2026 | — | Form 4 |
| Knopper Douglas S Director | Sell | 37,337 | $26.28 | $981.22K | 42.2% | 51,136 | Sep 17, 2026 | — | Form 4 |
| Caine Paul Director | Sell | 7,500 | $26.50 | $198.75K | 5.2% | 137,401 | Sep 17, 2026 | — | Form 4 |
| Spillane Robert F Director | Sell | 10,363 | $23.76 | $246.22K | 15.2% | 57,715 | Sep 14, 2026 | — | Form 4 |
| Buonasera David Other | Sell | 1,165 | $24.00 | $27.96K | 0.5% | 245,155 | Sep 14, 2026 | — | Form 4 |
| Spillane Robert F Director | Option exercise | 10,363 | $5.17 | $53.58K | 18.0% | 68,078 | Sep 14, 2026 | — | Form 4 |
| Evans Katie Seitz Other | Sell | 13,997 | $24.00 | $335.93K | 3.1% | 441,800 | Sep 11, 2026 | — | Form 4 |
| Caine Paul Director | Sell | 5,000 | $23.53 | $117.65K | 3.3% | 144,901 | Sep 10, 2026 | — | Form 4 |
| Saltz Aaron Other | Sell | 40,000 | $23.41 | $936.40K | 15.1% | 224,389 | Sep 10, 2026 | — | Form 4 |
| Evans Katie Seitz Other | Sell | 11,100 | $23.46 | $260.41K | 2.4% | 455,797 | Sep 9, 2026 | — | Form 4 |
| Evans Katie Seitz Other | Option exercise | 13,546 | $5.16 | $69.90K | 2.8% | 499,182 | Sep 8, 2026 | — | Form 4 |
| Evans Katie Seitz Other | Sell | 32,285 | $23.63 | $762.89K | 6.5% | 466,897 | Sep 8, 2026 | — | Form 4 |
| Buonasera David Other | Sell | 1,043 | $25.00 | $26.07K | 0.4% | 246,320 | Sep 2, 2026 | — | Form 4 |
| Buonasera David Other | Sell | 5,371 | $23.42 | $125.79K | 2.1% | 247,363 | Sep 1, 2026 | — | Form 4 |
| Harden Sarah Patricia Director | Sell | 18,436 | $24.00 | $442.46K | 13.8% | 114,751 | Aug 28, 2026 | — | Form 4 |
| Harden Sarah Patricia Director | Sell | 30,550 | $23.31 | $712.12K | 18.7% | 133,187 | Aug 26, 2026 | — | Form 4 |
| Buckley Sean Patrick Other | Sell | 2,759 | $25.00 | $68.97K | 0.9% | 293,060 | Aug 18, 2026 | — | Form 4 |
| Buckley Sean Patrick Other | Sell | 8,271 | $24.31 | $201.07K | 2.7% | 295,819 | Aug 17, 2026 | — | Form 4 |
| Evans Katie Seitz Other | Tax withheld | 11,204 | $24.73 | $277.07K | 2.3% | 485,636 | Aug 15, 2026 | — | Form 4 |
| Buckley Sean Patrick Other | Tax withheld | 11,715 | $24.73 | $289.71K | 3.7% | 304,090 | Aug 15, 2026 | — | Form 4 |
| Saltz Aaron Other | Tax withheld | 5,627 | $24.73 | $139.16K | 2.1% | 264,389 | Aug 15, 2026 | — | Form 4 |
| Gephart Brian Other | Tax withheld | 3,789 | $24.73 | $93.70K | 3.6% | 102,328 | Aug 15, 2026 | — | Form 4 |
| Day David CFO | Tax withheld | 14,170 | $24.73 | $350.42K | 3.0% | 452,861 | Aug 15, 2026 | — | Form 4 |
| BARRETT MICHAEL G. CEO | Tax withheld | 10,404 | $24.73 | $257.29K | 2.6% | 392,670 | Aug 15, 2026 | — | Form 4 |
| Buonasera David Other | Tax withheld | 8,102 | $24.73 | $200.36K | 3.1% | 252,734 | Aug 15, 2026 | — | Form 4 |
| Caine Paul Director | Sell | 7,500 | $25.00 | $187.50K | 4.8% | 149,901 | Aug 14, 2026 | — | Form 4 |
What these mean— the action is the SEC’s own Form 4 transaction code. Only a buy or a sell is an open-market trade; the rest are transfers, awards and exercises, which is why they carry no price.
- Sell (S) — Open-market or private sale
- Award (A) — Grant or award from the company, not a purchase
- Tax withheld (F) — Shares withheld to pay tax or an exercise price
- Option exercise (M) — Exercise or conversion of an exempt derivative
Disclaimer — Informational only — not investment advice. Insider transaction data is sourced from SEC Form 4 filings; market data from public feeds and may be delayed. The Insider Score is a proprietary score for research purposes and does not predict future performance. Always do your own research.