Insider · CIK 0001100612
Michael G. Barrett
Files at OUT (OUTFRONT Media Inc.), MGNI (MAGNITE, INC.). First filing Nov 13, 2024, latest Aug 7, 2026.
Michael G. Barrett files SEC Form 4 as CEO and director at MGNI (MAGNITE, INC.), and also at OUT (OUTFRONT Media Inc.). Since Nov 13, 2024, Michael G. Barrett has reported 0 open-market buys worth $0 and 12 open-market sells worth $29M, the latest filed on Aug 7, 2026.
A track record needs three past buys with six months of prices behind them; Michael G. Barrett has 0, so none is measured yet.
The newest scored trade: sold $6.7M of MGNI on Aug 6, 2026, filed Aug 7, 2026, scored 40 (moderate), under a 10b5-1 plan. In the last 12 months: 0 buys worth $0 and 4 sells worth $14M.
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 |
|---|---|---|---|---|---|
| 40Moderate | MAGNITE, INC. | $6.7M 293,968 shares | -42% | +117% from low-8% from high | |
| 27Weak | MAGNITE, INC. | $785k 38,596 shares | -9% | +83% from low-23% from high | |
| 35Weak | MAGNITE, INC. | $1.5M 75,000 shares | -16% | +71% from low-28% from high | |
| 40Moderate | MAGNITE, INC. | $4.7M 278,596 shares | -48% | +50% from low-37% from high | |
| 68Notable | MAGNITE, INC. | $857k 35,951 shares | -13% | +170% from low-1% from high | |
| 50Moderate | MAGNITE, INC. | $1.6M 70,900 shares | -20% | +162% from low-5% from high | |
| 55Moderate | MAGNITE, INC. | $6.0M 300,000 shares | -46% | +123% from low-5% from high | |
| 50Moderate | MAGNITE, INC. | $1.4M 75,000 shares | -10% | +106% from low-12% from high | |
| 50Moderate | MAGNITE, INC. | $2.6M 147,996 shares | -19% | - | |
| 38Weak | MAGNITE, INC. | $476k 27,004 shares | -3% | - | |
| 50Moderate | MAGNITE, INC. | $1.6M 100,000 shares | -11% | - | |
| 36Weak | MAGNITE, INC. | $375k 25,000 shares | -3% | - |
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 |
|---|---|---|---|---|---|
| Aug 6, 2026 | MGNI MAGNITE, INC. | 293,968 0.21% of outstanding | $6.7M | Aug 6, 2026 | $7.0M |
| Jul 15, 2026 | MGNI MAGNITE, INC. | 38,596 0.03% of outstanding | $786k | Jul 15, 2026 | $6.2M |
| Jun 29, 2026 | MGNI MAGNITE, INC. | 75,000 0.05% of outstanding | $1.5M | Jun 29, 2026 | $4.7M |
| Jun 16, 2026 | MGNI MAGNITE, INC. | 100,000 0.07% of outstanding | $1.8M | Jun 16, 2026 | $3.0M |
| Jun 15, 2026 | MGNI MAGNITE, INC. | 178,596 0.12% of outstanding | $3.0M | Jun 15, 2026 | none |
| Aug 15, 2025 | MGNI MAGNITE, INC. | 39,054 0.03% of outstanding | $926k | Aug 18, 2025 | $9.0M |
| Jul 15, 2025 | MGNI MAGNITE, INC. | 70,900 0.05% of outstanding | $1.7M | Jul 15, 2025 | $7.4M |
| Jun 25, 2025 | MGNI MAGNITE, INC. | 300,000 0.22% of outstanding | $6.0M | Jun 24, 2025 | $1.4M |
| Jun 23, 2025 | MGNI MAGNITE, INC. | 30,000 0.02% of outstanding | $570k | Jun 18, 2025 | $799k |
| Jun 17, 2025 | MGNI MAGNITE, INC. | 45,000 0.03% of outstanding | $799k | Jun 16, 2025 | none |
| Dec 4, 2024 | MGNI MAGNITE, INC. | 147,996 0.11% of outstanding | $2.6M | Dec 4, 2024 | $476k |
| Nov 25, 2024 | MGNI MAGNITE, INC. | 27,004 0.02% of outstanding | $476k | Nov 25, 2024 | $1.6M |
| Nov 18, 2024 | MGNI MAGNITE, INC. | 100,000 0.07% of outstanding | $1.6M | Nov 15, 2024 | $375k |
| Nov 12, 2024 | MGNI MAGNITE, INC. | 25,000 0.02% of outstanding | $375k | Nov 11, 2024 | $939k |
Transactions
Every row this insider has filed, 48 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 18, 2026 | OUT OUTFRONT Media Inc. | MOption exercise Common Stock | +6,047 | $0.00 | $0 | 6,047 | 22 d ago |
| Sep 18, 2026 | OUT OUTFRONT Media Inc. | AGrant or award Common Stock | +265 | $0.00 | $0 | 6,312 | 22 d ago |
| Sep 18, 2026 | OUT OUTFRONT Media Inc. | MOption exercise Restricted Share Unitsderivative | -6,047 | $0.00 | $0 | 0 | 22 d ago |
| Aug 15, 2026 | MGNI MAGNITE, INC. | FTax withholding Common Stock | -10,404 | $24.73 | $257k | 392,670 | Aug 18, 2026 |
| Aug 6, 2026 | MGNI MAGNITE, INC. | MOption exercise Common Stock10b5-1 | +293,968 | $5.80 | $1.7M | 697,042 | Aug 7, 2026 |
| Aug 6, 2026 | MGNI MAGNITE, INC. | SOpen-market sale Common Stock10b5-1 | -293,968 | $22.72 | $6.7M | 403,074 | Aug 7, 2026 |
| Aug 6, 2026 | MGNI MAGNITE, INC. | MOption exercise Stock Option (right to buy)derivative10b5-1 | -293,968 | $0.00 | $0 | 0 | Aug 7, 2026 |
| Jul 15, 2026 | MGNI MAGNITE, INC. | MOption exercise Common Stock10b5-1 | +38,596 | $5.80 | $224k | 441,670 | Jul 17, 2026 |
| Jul 15, 2026 | MGNI MAGNITE, INC. | SOpen-market sale Common Stock10b5-1 | -38,596 | $20.35 | $785k | 403,074 | Jul 17, 2026 |
| Jul 15, 2026 | MGNI MAGNITE, INC. | MOption exercise Employee Stock Option (Right to Buy)derivative10b5-1 | -38,596 | $0.00 | $0 | 293,968 | Jul 17, 2026 |
| Jun 29, 2026 | MGNI MAGNITE, INC. | MOption exercise Common Stock10b5-1 | +75,000 | $5.80 | $435k | 478,074 | Jul 1, 2026 |
| Jun 29, 2026 | MGNI MAGNITE, INC. | SOpen-market sale Common Stock10b5-1 | -75,000 | $19.50 | $1.5M | 403,074 | Jul 1, 2026 |
| Jun 29, 2026 | MGNI MAGNITE, INC. | MOption exercise Employee Stock Option (Right to Buy)derivative10b5-1 | -75,000 | $0.00 | $0 | 332,564 | Jul 1, 2026 |
| Jun 15, 2026 | MGNI MAGNITE, INC. | MOption exercise Common Stock10b5-1 | +178,596 | $5.80 | $1.0M | 581,670 | Jun 17, 2026 |
| Jun 15, 2026 | MGNI MAGNITE, INC. | SOpen-market sale Common Stock10b5-1 | -178,596 | $16.59 | $3.0M | 403,074 | Jun 17, 2026 |
| Jun 16, 2026 | MGNI MAGNITE, INC. | MOption exercise Common Stock10b5-1 | +100,000 | $5.80 | $580k | 503,074 | Jun 17, 2026 |
| Jun 16, 2026 | MGNI MAGNITE, INC. | SOpen-market sale Common Stock10b5-1 | -100,000 | $17.50 | $1.8M | 403,074 | Jun 17, 2026 |
| Jun 15, 2026 | MGNI MAGNITE, INC. | MOption exercise Employee Stock Option (Right to Buy)derivative10b5-1 | -178,596 | $0.00 | $0 | 507,564 | Jun 17, 2026 |
| Jun 16, 2026 | MGNI MAGNITE, INC. | MOption exercise Employee Stock Option (Right to Buy)derivative10b5-1 | -100,000 | $0.00 | $0 | 407,564 | Jun 17, 2026 |
| Jun 3, 2026 | OUT OUTFRONT Media Inc. | AGrant or award Restricted Share Unitsderivative | +5,918 | $0.00 | $0 | 5,918 | Jun 4, 2026 |
| May 15, 2026 | MGNI MAGNITE, INC. | FTax withholding Common Stock | -10,404 | $12.82 | $133k | 403,074 | May 19, 2026 |
| Feb 15, 2026 | MGNI MAGNITE, INC. | FTax withholding Common Stock | -23,549 | $11.70 | $276k | 412,162 | Feb 18, 2026 |
| Jan 9, 2026 | MGNI MAGNITE, INC. | MOption exercise Common Stock | +213,750 | $0.00 | $0 | 545,453 | Jan 12, 2026 |
| Jan 9, 2026 | MGNI MAGNITE, INC. | FTax withholding Common Stock | -109,742 | $16.17 | $1.8M | 435,711 | Jan 12, 2026 |
| Jan 9, 2026 | MGNI MAGNITE, INC. | MOption exercise Performance Stock Unitsderivative | -213,750 | $0.00 | $0 | 0 | Jan 12, 2026 |
| Jan 1, 2026 | MGNI MAGNITE, INC. | AGrant or award Common Stock | +94,044 | $0.00 | $0 | 331,703 | Jan 5, 2026 |
| Jan 1, 2026 | MGNI MAGNITE, INC. | AGrant or award Performance Stock Unitsderivative | +122,864 | $0.00 | $0 | 122,864 | Jan 5, 2026 |
| Jan 1, 2026 | MGNI MAGNITE, INC. | AGrant or award Stock Option (Right to Buy)derivative | +90,909 | $0.00 | $0 | 90,909 | Jan 5, 2026 |
| Nov 15, 2025 | MGNI MAGNITE, INC. | FTax withholding Common Stock | -12,198 | $14.15 | $173k | 237,659 | Nov 18, 2025 |
| Sep 18, 2025 | OUT OUTFRONT Media Inc. | AGrant or award Restricted Share Unitsderivative | +6,047 | $0.00 | $0 | 6,047 | Sep 22, 2025 |
| Aug 18, 2025 | MGNI MAGNITE, INC. | SOpen-market sale Common Stock | -35,951 | $23.85 | $857k | 249,857 | Aug 20, 2025 |
| Jul 15, 2025 | MGNI MAGNITE, INC. | SOpen-market sale Common Stock10b5-1 | -70,900 | $23.27 | $1.6M | 285,808 | Jul 17, 2025 |
| Jun 24, 2025 | MGNI MAGNITE, INC. | SOpen-market sale Common Stock10b5-1 | -300,000 | $20.01 | $6.0M | 356,708 | Jun 26, 2025 |
| Jun 16, 2025 | MGNI MAGNITE, INC. | SOpen-market sale Common Stock10b5-1 | -45,000 | $17.76 | $799k | 686,708 | Jun 18, 2025 |
| Jun 18, 2025 | MGNI MAGNITE, INC. | SOpen-market sale Common Stock10b5-1 | -30,000 | $19.00 | $570k | 656,708 | Jun 18, 2025 |
| May 15, 2025 | MGNI MAGNITE, INC. | FTax withholding Common Stock | -13,086 | $15.88 | $208k | 731,708 | May 16, 2025 |
| Feb 15, 2025 | MGNI MAGNITE, INC. | FTax withholding Common Stock | -26,499 | $20.00 | $530k | 743,217 | Feb 19, 2025 |
| Feb 5, 2025 | MGNI MAGNITE, INC. | MOption exercise Common Stock | +108,360 | $0.00 | $0 | 825,391 | Feb 7, 2025 |
| Feb 5, 2025 | MGNI MAGNITE, INC. | FTax withholding Common Stock | -55,675 | $17.97 | $1.0M | 769,716 | Feb 7, 2025 |
| Feb 5, 2025 | MGNI MAGNITE, INC. | MOption exercise Performance Stock Unitsderivative | -86,806 | $0.00 | $0 | 0 | Feb 7, 2025 |
| Jan 9, 2025 | MGNI MAGNITE, INC. | AGrant or award Common Stock | +82,117 | $0.00 | $0 | 717,031 | Jan 13, 2025 |
| Jan 9, 2025 | MGNI MAGNITE, INC. | AGrant or award Performance Stock Unitsderivative | +107,497 | $0.00 | $0 | 107,497 | Jan 13, 2025 |
| Jan 9, 2025 | MGNI MAGNITE, INC. | AGrant or award Stock Option (Right to Buy)derivative | +81,374 | $0.00 | $0 | 81,374 | Jan 13, 2025 |
| Dec 4, 2024 | MGNI MAGNITE, INC. | SOpen-market sale Common Stock10b5-1 | -147,996 | $17.52 | $2.6M | 634,914 | Dec 6, 2024 |
| Nov 25, 2024 | MGNI MAGNITE, INC. | SOpen-market sale Common Stock10b5-1 | -27,004 | $17.63 | $476k | 782,910 | Nov 27, 2024 |
| Nov 15, 2024 | MGNI MAGNITE, INC. | FTax withholding Common Stock10b5-1 | -9,638 | $15.85 | $153k | 909,914 | Nov 19, 2024 |
| Nov 15, 2024 | MGNI MAGNITE, INC. | SOpen-market sale Common Stock10b5-1 | -100,000 | $16.14 | $1.6M | 809,914 | Nov 19, 2024 |
| Nov 11, 2024 | MGNI MAGNITE, INC. | SOpen-market sale Common Stock10b5-1 | -25,000 | $15.00 | $375k | 919,552 | Nov 13, 2024 |
Questions about Michael G. Barrett
Answered from the filings on this page, as of the latest one.
Is Michael G. Barrett buying or selling?
In the last 12 months Michael G. Barrett reported 0 open-market buys worth $0 and 4 open-market sells worth $14M on SEC Form 4; the latest was sold $6.7M of MGNI on Aug 6, 2026. Grants, option exercises and tax withholding are not counted.
How did Michael G. Barrett's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Michael G. Barrett has 0.
Where does Michael G. Barrett file Form 4?
Michael G. Barrett has filed Form 4 at MGNI (MAGNITE, INC.) as CEO; OUT (OUTFRONT Media 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.