Insider · CIK 0001603808
Robert F Spillane
Files at MGNI (MAGNITE, INC.). First filing Nov 22, 2024, latest Sep 16, 2026.
In brief
Robert F Spillane files SEC Form 4 as director at MGNI (MAGNITE, INC.). Since Nov 22, 2024, Robert F Spillane has reported 0 open-market buys worth $0 and 5 open-market sells worth $1.0M, the latest filed on Sep 16, 2026.
A track record needs three past buys with six months of prices behind them; Robert F Spillane has 0, so none is measured yet.
The newest scored trade: sold $246k of MGNI on Sep 14, 2026, filed Sep 16, 2026, scored 33 (weak). In the last 12 months: 0 buys worth $0 and 3 sells worth $557k.
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
MGNI: MAGNITE, INC.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 33Weak | MAGNITE, INC. | $246k 10,363 shares | -15% | +113% from low-8% from high | |
| 39Weak | MAGNITE, INC. | $133k 10,000 shares | -19% | +20% from low-50% from high | |
| 47Moderate | MAGNITE, INC. | $178k 12,500 shares | -19% | +56% from low-47% from high | |
| 48Moderate | MAGNITE, INC. | $264k 15,000 shares | -18% | +94% from low-18% from high | |
| 47Moderate | MAGNITE, INC. | $202k 12,500 shares | -15% | - |
Planned sales
Form 144 notices this insider filed before selling restricted or control stock, newest first.
| Filed | Company | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| Sep 14, 2026 | MGNI MAGNITE, INC. | 10,363 0.01% of outstanding | $246k | Sep 14, 2026 | none |
| May 19, 2026 | MGNI MAGNITE, INC. | 10,000 0.01% of outstanding | $133k | May 19, 2026 | none |
| Nov 21, 2025 | MGNI MAGNITE, INC. | 12,500 0.01% of outstanding | $178k | Nov 21, 2025 | none |
| Jun 10, 2025 | MGNI MAGNITE, INC. | 15,000 0.01% of outstanding | $264k | Jun 10, 2025 | none |
| Nov 20, 2024 | MGNI MAGNITE, INC. | 12,500 0.01% of outstanding | $202k | Nov 20, 2024 | none |
Transactions
Every row this insider has filed, 9 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 14, 2026 | MGNI MAGNITE, INC. | MOption exercise Common Stock | +10,363 | $5.17 | $54k | 68,078 | 27 d ago |
| Sep 14, 2026 | MGNI MAGNITE, INC. | SOpen-market sale Common Stock | -10,363 | $23.76 | $246k | 57,715 | 27 d ago |
| Sep 14, 2026 | MGNI MAGNITE, INC. | MOption exercise Stock Option (right to buy)derivative | -10,363 | $0.00 | $0 | 0 | 27 d ago |
| Jun 8, 2026 | MGNI MAGNITE, INC. | AGrant or award Common Stock | +13,798 | $0.00 | $0 | 57,715 | Jun 10, 2026 |
| May 19, 2026 | MGNI MAGNITE, INC. | SOpen-market sale Common Stock | -10,000 | $13.33 | $133k | 43,917 | May 21, 2026 |
| Nov 21, 2025 | MGNI MAGNITE, INC. | SOpen-market sale Common Stock | -12,500 | $14.22 | $178k | 53,917 | Nov 21, 2025 |
| Jun 10, 2025 | MGNI MAGNITE, INC. | SOpen-market sale Common Stock | -15,000 | $17.57 | $264k | 66,417 | Jun 12, 2025 |
| Jun 5, 2025 | MGNI MAGNITE, INC. | AGrant or award Common Stock | +10,766 | $0.00 | $0 | 81,417 | Jun 6, 2025 |
| Nov 20, 2024 | MGNI MAGNITE, INC. | SOpen-market sale Common Stock | -12,500 | $16.12 | $202k | 70,651 | Nov 22, 2024 |
Questions about Robert F Spillane
Answered from the filings on this page, as of the latest one.
Is Robert F Spillane buying or selling?
In the last 12 months Robert F Spillane reported 0 open-market buys worth $0 and 3 open-market sells worth $557k on SEC Form 4; the latest was sold $246k of MGNI on Sep 14, 2026. Grants, option exercises and tax withholding are not counted.
How did Robert F Spillane's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Robert F Spillane has 0.
Where does Robert F Spillane file Form 4?
Robert F Spillane has filed Form 4 at MGNI (MAGNITE, INC.). A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
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.