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Brian Gephart
Insider
First SEC filing: Feb. 3, 2022 · Latest: Feb. 3, 2022
Insider at
Insider transactions
0 buys (P)
1 sells (S)
Net: $-307,982
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 |
|---|---|---|---|---|---|---|---|---|---|
| Oct. 1, 2026 | MGNI | A | 64,682 | · | · | 167,010 Direct | +63.21% | Acquired | (price as of 2026-10-06) |
| Aug. 15, 2026 | MGNI | F | 3,789 | $24.73 | $93,702 | 102,328 Direct | -3.57% | Disposed | 0.4% (price as of 2026-10-06) |
| Aug. 10, 2026 | MGNI | S | 12,479 | $24.68 | $307,982 | 106,117 Direct | -10.52% | Disposed | 0.6% (price as of 2026-10-06) |
| May 15, 2026 | MGNI | F | 3,789 | $12.82 | $48,575 | 118,596 Direct | -3.10% | Disposed | 93.8% (price as of 2026-10-06) |
| Feb. 15, 2026 | MGNI | F | 6,149 | $11.70 | $71,943 | 122,385 Direct | -4.78% | Disposed | 112.3% (price as of 2026-10-06) |
| Jan. 1, 2026 | MGNI | A | 39,185 | · | · | 128,534 Direct | +43.86% | Acquired | (price as of 2026-10-06) |
| Nov. 15, 2025 | MGNI | F | 3,549 | $14.15 | $50,218 | 89,349 Direct | -3.82% | Disposed | 75.5% (price as of 2026-10-06) |
| Sept. 4, 2025 | MGNI | S 10b5-1 | 27,671 | $24.71 | $683,750 | 92,898 Direct | -22.95% | Disposed | 0.5% (price as of 2026-10-06) |
| Aug. 18, 2025 | MGNI | S | 2,961 | $23.85 | $70,620 | 120,569 Direct | -2.40% | Disposed | 4.2% (price as of 2026-10-06) |
| May 15, 2025 | MGNI | F | 3,045 | $15.88 | $48,355 | 123,530 Direct | -2.41% | Disposed | 56.4% (price as of 2026-10-06) |
| May 12, 2025 | MGNI | S | 6,334 | $16.16 | $102,357 | 126,575 Direct | -4.77% | Disposed | 53.7% (price as of 2026-10-06) |
| March 3, 2025 | MGNI | S | 6,250 | $16.00 | $100,000 | 132,909 Direct | -4.49% | Disposed | 55.3% (price as of 2026-10-06) |
| Feb. 15, 2025 | MGNI | F | 6,749 | $20.00 | $134,980 | 139,159 Direct | -4.63% | Disposed | 24.2% (price as of 2026-10-06) |
| Jan. 2, 2025 | MGNI | A | 33,113 | · | · | 145,908 Direct | +29.36% | Acquired | (price as of 2026-10-06) |
| Nov. 18, 2024 | MGNI | S 10b5-1 | 2,156 | $15.60 | $33,634 | 112,795 Direct | -1.88% | Disposed | 59.2% (price as of 2026-10-06) |
| Nov. 15, 2024 | MGNI | F | 2,031 | $15.85 | $32,191 | 114,951 Direct | -1.74% | Disposed | 56.7% (price as of 2026-10-06) |
| Nov. 11, 2024 | MGNI | S 10b5-1 | 2,156 | $15.00 | $32,340 | 116,982 Direct | -1.81% | Disposed | 65.6% (price as of 2026-10-06) |
| Aug. 15, 2024 | MGNI | F | 2,031 | $12.51 | $25,408 | 119,138 Direct | -1.68% | Disposed | 98.6% (price as of 2026-10-06) |
| July 15, 2024 | MGNI | S 10b5-1 | 16,166 | $15.00 | $242,490 | 121,169 Direct | -11.77% | Disposed | 65.6% (price as of 2026-10-06) |
| May 15, 2024 | MGNI | F | 2,004 | $9.80 | $19,639 | 137,335 Direct | -1.44% | Disposed | 153.5% (price as of 2026-10-06) |
| Feb. 15, 2024 | MGNI | F | 5,650 | $9.74 | $55,031 | 139,339 Direct | -3.90% | Disposed | 155.0% (price as of 2026-10-06) |
| Jan. 2, 2024 | MGNI | A | 50,667 | · | · | 144,989 Direct | +53.72% | Acquired | (price as of 2026-10-06) |
| Nov. 15, 2023 | MGNI | F | 1,100 | $7.89 | $8,679 | 94,322 Direct | -1.15% | Disposed | 214.8% (price as of 2026-10-06) |
| Aug. 16, 2023 | MGNI | S | 1,141 | $8.31 | $9,482 | 95,422 Direct | -1.18% | Disposed | 198.9% (price as of 2026-10-06) |
| May 16, 2023 | MGNI | S | 1,237 | $10.88 | $13,459 | 96,563 Direct | -1.26% | Disposed | 128.3% (price as of 2026-10-06) |
| Feb. 15, 2023 | MGNI | F | 3,850 | $13.27 | $51,090 | 97,800 Direct | -3.79% | Disposed | 87.2% (price as of 2026-10-06) |
| Jan. 1, 2023 | MGNI | A | 45,167 | · | · | 101,650 Direct | +79.97% | Acquired | (price as of 2026-10-06) |
| Nov. 15, 2022 | MGNI | F | 366 | $11.47 | $4,198 | 56,483 Direct | -0.64% | Disposed | 116.6% (price as of 2026-10-06) |
| Aug. 15, 2022 | MGNI | F | 1,712 | $9.80 | $16,778 | 56,849 Direct | -2.92% | Disposed | 153.5% (price as of 2026-10-06) |
| Feb. 1, 2022 | MGNI | A | 38,036 | · | · | 56,304 Direct | +208.21% | Acquired | (price as of 2026-10-06) |
| July 1, 2021 | MGNI | A | 13,594 | · | · | 13,594 Direct | · | Acquired | (price as of 2026-10-06) |
| July 1, 2021 | MGNI | A | 18,268 | · | · | 18,268 Direct | · | Acquired | (price as of 2026-10-06) |
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 |
|---|---|---|---|---|---|---|---|
| July 1, 2021 | MGNI | Stock Option (Right to Buy) | Common Stock | $34.68 | July 1, 2031 | 13,594 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).