Sean Patrick Buckley
Insider
First SEC filing: June 18, 2026 · Latest: June 18, 2026
Insider at
Insider transactions
0 buys (P)
8 sells (S)
Net: $-2,776,475
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 | -1.1% (price as of 2026-10-02) |
| Aug. 17, 2026 | MGNI | S 10b5-1 | 8,271 | $24.31 | $201,068 | 295,819 Direct | -2.72% | Disposed | 1.7% (price as of 2026-10-02) |
| Aug. 15, 2026 | MGNI | F | 11,715 | $24.73 | $289,712 | 304,090 Direct | -3.71% | Disposed | 0.0% (price as of 2026-10-02) |
| Aug. 6, 2026 | MGNI | M 10b5-1 | 28,703 | $13.90 | $398,972 | 382,984 Direct | +8.10% | Acquired | 77.9% (price as of 2026-10-02) |
| Aug. 6, 2026 | MGNI | S 10b5-1 | 47,942 | $25.09 | $1,202,865 | 335,042 Direct | -12.52% | Disposed | -1.4% (price as of 2026-10-02) |
| Aug. 6, 2026 | MGNI | S 10b5-1 | 19,237 | $23.00 | $442,451 | 315,805 Direct | -5.74% | Disposed | 7.5% (price as of 2026-10-02) |
| Aug. 6, 2026 | MGNI | M 10b5-1 | 28,703 | · | · | 57,405 Direct | -33.33% | Disposed | (price as of 2026-10-02) |
| July 7, 2026 | MGNI | S 10b5-1 | 19,233 | $21.03 | $404,470 | 354,281 Direct | -5.15% | Disposed | 17.6% (price as of 2026-10-02) |
| June 17, 2026 | MGNI | S 10b5-1 | 19,233 | $19.00 | $365,427 | 373,514 Direct | -4.90% | Disposed | 30.2% (price as of 2026-10-02) |
| May 15, 2026 | MGNI | F | 12,019 | $12.82 | $154,084 | 392,747 Direct | -2.97% | Disposed | 92.9% (price as of 2026-10-02) |
| Feb. 15, 2026 | MGNI | F | 26,942 | $11.70 | $315,221 | 402,999 Direct | -6.27% | Disposed | 111.4% (price as of 2026-10-02) |
| Jan. 9, 2026 | MGNI | M | 64,125 | · | · | 460,310 Direct | +16.19% | Acquired | (price as of 2026-10-02) |
| Jan. 9, 2026 | MGNI | F | 30,369 | $16.17 | $491,067 | 429,941 Direct | -6.60% | Disposed | 52.9% (price as of 2026-10-02) |
| Jan. 9, 2026 | MGNI | M | 64,125 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Jan. 1, 2026 | MGNI | A | 127,273 | · | · | 396,185 Direct | +47.33% | Acquired | (price as of 2026-10-02) |
| Jan. 1, 2026 | MGNI | A | 42,757 | · | · | 42,757 Direct | · | Acquired | (price as of 2026-10-02) |
| Nov. 24, 2025 | MGNI | S 10b5-1 | 2,213 | $14.50 | $32,088 | 268,912 Direct | -0.82% | Disposed | 70.6% (price as of 2026-10-02) |
| Nov. 18, 2025 | MGNI | S 10b5-1 | 4,426 | $13.36 | $59,131 | 271,125 Direct | -1.61% | Disposed | 85.1% (price as of 2026-10-02) |
| Nov. 15, 2025 | MGNI | F | 11,642 | $14.15 | $164,734 | 275,551 Direct | -4.05% | Disposed | 74.8% (price as of 2026-10-02) |
| Sept. 9, 2025 | MGNI | S | 20,000 | $24.61 | $492,200 | 287,193 Direct | -6.51% | Disposed | 0.5% (price as of 2026-10-02) |
| Sept. 8, 2025 | MGNI | S | 20,000 | $25.56 | $511,200 | 307,193 Direct | -6.11% | Disposed | -3.2% (price as of 2026-10-02) |
| Aug. 19, 2025 | MGNI | S 10b5-1 | 9,315 | $23.42 | $218,157 | 327,193 Direct | -2.77% | Disposed | 5.6% (price as of 2026-10-02) |
| Aug. 18, 2025 | MGNI | S | 10,886 | $23.85 | $259,631 | 336,508 Direct | -3.13% | Disposed | 3.7% (price as of 2026-10-02) |
| May 16, 2025 | MGNI | S 10b5-1 | 9,692 | $15.73 | $152,455 | 347,394 Direct | -2.71% | Disposed | 57.2% (price as of 2026-10-02) |
| May 15, 2025 | MGNI | F | 15,049 | $15.88 | $238,978 | 357,086 Direct | -4.04% | Disposed | 55.7% (price as of 2026-10-02) |
| Feb. 19, 2025 | MGNI | S 10b5-1 | 10,527 | $19.13 | $201,382 | 370,558 Direct | -2.76% | Disposed | 29.3% (price as of 2026-10-02) |
| Feb. 15, 2025 | MGNI | F | 27,444 | $20.00 | $548,880 | 381,085 Direct | -6.72% | Disposed | 23.7% (price as of 2026-10-02) |
| Feb. 7, 2025 | MGNI | S 10b5-1 | 18,693 | $20.00 | $373,860 | 408,529 Direct | -4.38% | Disposed | 23.7% (price as of 2026-10-02) |
| Jan. 9, 2025 | MGNI | A | 123,479 | · | · | 427,222 Direct | +40.65% | Acquired | (price as of 2026-10-02) |
| Jan. 9, 2025 | MGNI | A | 41,566 | · | · | 41,566 Direct | · | Acquired | (price as of 2026-10-02) |
| Nov. 18, 2024 | MGNI | S 10b5-1 | 10,001 | $15.60 | $156,016 | 303,743 Direct | -3.19% | Disposed | 58.5% (price as of 2026-10-02) |
| Nov. 15, 2024 | MGNI | F | 10,133 | $15.85 | $160,608 | 313,744 Direct | -3.13% | Disposed | 56.0% (price as of 2026-10-02) |
| Nov. 11, 2024 | MGNI | S 10b5-1 | 2,623 | $14.50 | $38,034 | 326,496 Direct | -0.80% | Disposed | 70.6% (price as of 2026-10-02) |
| Nov. 11, 2024 | MGNI | S 10b5-1 | 2,619 | $15.50 | $40,594 | 323,877 Direct | -0.80% | Disposed | 59.5% (price as of 2026-10-02) |
| Aug. 20, 2024 | MGNI | S 10b5-1 | 2,623 | $13.50 | $35,410 | 329,119 Direct | -0.79% | Disposed | 83.2% (price as of 2026-10-02) |
| Aug. 19, 2024 | MGNI | S 10b5-1 | 2,623 | $12.53 | $32,866 | 331,742 Direct | -0.78% | Disposed | 97.4% (price as of 2026-10-02) |
| Aug. 15, 2024 | MGNI | F | 9,646 | $12.51 | $120,671 | 334,365 Direct | -2.80% | Disposed | 97.7% (price as of 2026-10-02) |
| July 16, 2024 | MGNI | S 10b5-1 | 19,604 | $15.50 | $303,862 | 344,011 Direct | -5.39% | Disposed | 59.5% (price as of 2026-10-02) |
| July 15, 2024 | MGNI | S 10b5-1 | 19,607 | $14.50 | $284,302 | 363,615 Direct | -5.12% | Disposed | 70.6% (price as of 2026-10-02) |
| June 5, 2024 | MGNI | S 10b5-1 | 21,653 | $13.50 | $292,316 | 383,222 Direct | -5.35% | Disposed | 83.2% (price as of 2026-10-02) |
| May 24, 2024 | MGNI | S 10b5-1 | 2,682 | $12.50 | $33,525 | 404,875 Direct | -0.66% | Disposed | 97.8% (price as of 2026-10-02) |
| May 16, 2024 | MGNI | S 10b5-1 | 16,925 | $12.50 | $211,562 | 407,557 Direct | -3.99% | Disposed | 97.8% (price as of 2026-10-02) |
| May 15, 2024 | MGNI | F | 9,407 | $9.80 | $92,189 | 421,210 Direct | -2.18% | Disposed | 152.3% (price as of 2026-10-02) |
| Feb. 15, 2024 | MGNI | F | 24,110 | $9.74 | $234,831 | 430,617 Direct | -5.30% | Disposed | 153.9% (price as of 2026-10-02) |
| Jan. 2, 2024 | MGNI | A | 50,752 | · | · | 50,752 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 2, 2024 | MGNI | A | 142,276 | · | · | 454,727 Direct | +45.54% | Acquired | (price as of 2026-10-02) |
| Nov. 15, 2023 | MGNI | F | 5,078 | $7.89 | $40,065 | 312,451 Direct | -1.60% | Disposed | 213.4% (price as of 2026-10-02) |
| Aug. 16, 2023 | MGNI | S | 5,273 | $8.31 | $43,819 | 317,529 Direct | -1.63% | Disposed | 197.6% (price as of 2026-10-02) |
| June 2, 2023 | MGNI | S | 12,219 | $12.99 | $158,725 | 322,802 Direct | -3.65% | Disposed | 90.4% (price as of 2026-10-02) |
| May 16, 2023 | MGNI | S | 5,640 | $10.88 | $61,363 | 335,021 Direct | -1.66% | Disposed | 127.3% (price as of 2026-10-02) |
| Feb. 15, 2023 | MGNI | F | 15,401 | $13.27 | $204,371 | 336,205 Direct | -4.38% | Disposed | 86.4% (price as of 2026-10-02) |
| Jan. 1, 2023 | MGNI | A | 50,752 | · | · | 50,752 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 1, 2023 | MGNI | A | 142,276 | · | · | 351,606 Direct | +67.97% | Acquired | (price as of 2026-10-02) |
| Nov. 15, 2022 | MGNI | F | 1,632 | $11.47 | $18,719 | 209,330 Direct | -0.77% | Disposed | 115.6% (price as of 2026-10-02) |
| Aug. 15, 2022 | MGNI | F | 1,632 | $9.80 | $15,994 | 210,962 Direct | -0.77% | Disposed | 152.3% (price as of 2026-10-02) |
| June 1, 2022 | MGNI | F | 11,185 | $10.70 | $119,680 | 212,594 Direct | -5.00% | Disposed | 131.1% (price as of 2026-10-02) |
| May 15, 2022 | MGNI | F | 6,525 | $10.59 | $69,100 | 223,779 Direct | -2.83% | Disposed | 133.5% (price as of 2026-10-02) |
| Feb. 1, 2022 | MGNI | A | 86,108 | · | · | 86,108 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 1, 2022 | MGNI | A | 121,024 | · | · | 230,304 Direct | +110.75% | Acquired | (price as of 2026-10-02) |
| June 1, 2021 | MGNI | A | 43,788 | · | · | 43,788 Direct | · | Acquired | (price as of 2026-10-02) |
| June 1, 2021 | MGNI | A | 50,437 | · | · | 109,280 Direct | +85.71% | Acquired | (price as of 2026-10-02) |
| June 1, 2021 | MGNI | A | 58,843 | · | · | 58,843 Direct | · | Acquired | (price as of 2026-10-02) |
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 | $13.90 | Feb. 1, 2032 | 28,703 | Disposed |
| Jan. 9, 2026 | MGNI | Performance Stock Units | Common Stock | · | · | 64,125 | Disposed |
| Jan. 1, 2026 | MGNI | Performance Stock Units | Common Stock | · | · | 42,757 | Acquired |
| Jan. 9, 2025 | MGNI | Performance Stock Units | Common Stock | · | · | 41,566 | Acquired |
| Jan. 2, 2024 | MGNI | Performance Stock Units | Common Stock | · | · | 50,752 | Acquired |
| Jan. 1, 2023 | MGNI | Performance Stock Units | Common Stock | · | · | 50,752 | Acquired |
| Feb. 1, 2022 | MGNI | Stock Option (Right to Buy) | Common Stock | $13.90 | Feb. 1, 2032 | 86,108 | Acquired |
| June 1, 2021 | MGNI | Stock Option (Right to Buy) | Common Stock | $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.