Sean Patrick Buckley
CIK 1865116 · View on SEC EDGAR ↗
First SEC filing: June 18, 2026 · Latest: June 18, 2026
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Insider transactions
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Aug. 18, 2026 | MGNI | S 10b5-1 | 2,759 | $25.00 | $68,975 | 293,060 Direct | -0.93% | Disposed | -6.0% (price as of 2026-08-20) |
| Aug. 17, 2026 | MGNI | S 10b5-1 | 8,271 | $24.31 | $201,068 | 295,819 Direct | -2.72% | Disposed | -3.3% (price as of 2026-08-20) |
| Aug. 6, 2026 | MGNI | S 10b5-1 | 47,942 | $25.09 | $1,202,865 | 335,042 Direct | -12.52% | Disposed | -6.3% (price as of 2026-08-20) |
| Aug. 6, 2026 | MGNI | S 10b5-1 | 19,237 | $23.00 | $442,451 | 315,805 Direct | -5.74% | Disposed | 2.2% (price as of 2026-08-20) |
| July 7, 2026 | MGNI | S 10b5-1 | 19,233 | $21.03 | $404,470 | 354,281 Direct | -5.15% | Disposed | 11.8% (price as of 2026-08-20) |
| June 17, 2026 | MGNI | S 10b5-1 | 19,233 | $19.00 | $365,427 | 373,514 Direct | -4.90% | Disposed | 23.7% (price as of 2026-08-20) |
| Aug. 16, 2023 | MGNI | S | 5,273 | $8.31 | $43,819 | 317,529 Direct | -1.63% | Disposed | 182.9% (price as of 2026-08-20) |
| June 2, 2023 | MGNI | S | 12,219 | $12.99 | $158,725 | 322,802 Direct | -3.65% | Disposed | 80.9% (price as of 2026-08-20) |
| May 16, 2023 | MGNI | S | 5,640 | $10.88 | $61,363 | 335,021 Direct | -1.66% | Disposed | 116.0% (price as of 2026-08-20) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II)
Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| Aug. 6, 2026 | MGNI | Stock Option (right to buy) | Common Stock (28,703) | $13.90 | Feb. 1, 2032 | 28,703 | Disposed |
| Jan. 2, 2024 | MGNI | Performance Stock Units | Common Stock (50,752) | — | — | 50,752 | Acquired |
| Jan. 1, 2023 | MGNI | Performance Stock Units | Common Stock (50,752) | — | — | 50,752 | Acquired |
| Feb. 1, 2022 | MGNI | Stock Option (Right to Buy) | Common Stock (86,108) | $13.90 | Feb. 1, 2032 | 86,108 | Acquired |
| June 1, 2021 | MGNI | Stock Option (Right to Buy) | Common Stock (43,788) | $30.93 | June 1, 2031 | 43,788 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Compensation (DEF 14A)
Matched by name from proxy statements (DEF 14A) — verify against the filing.
| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2025 | $600,000 | $21,240 | $2,902,469 | — | $581,040 | — | $7,635 | $4,112,384 |
| 2024 | $572,500 | — | $1,905,910 | — | $619,617 | — | $7,291 | $3,105,318 |
| 2023 | $572,500 | — | $2,181,704 | — | $475,977 | — | $7,291 | $3,237,472 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.