Stuart Naylor
Insider
First SEC filing: June 8, 2018 · Latest: June 8, 2018
Insider at
Insider transactions
0 buys (P)
3 sells (S)
Net: $-668,377
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 |
|---|---|---|---|---|---|---|---|---|---|
| July 7, 2026 | MGTX | S 10b5-1 | 25,112 | $14.90 | $374,169 | 640,846 Direct | -3.77% | Disposed | -27.6% (price as of 2026-10-02) |
| July 7, 2026 | MGTX | S 10b5-1 | 2,547 | $13.86 | $35,301 | 665,958 Direct | -0.38% | Disposed | -22.2% (price as of 2026-10-02) |
| June 25, 2026 | MGTX | A | 70,000 | · | · | 70,000 Direct | · | Acquired | (price as of 2026-10-02) |
| April 7, 2026 | MGTX | S 10b5-1 | 27,661 | $9.36 | $258,907 | 668,505 Direct | -3.97% | Disposed | 15.3% (price as of 2026-10-02) |
| Feb. 21, 2026 | MGTX | M | 25,000 | · | · | 707,916 Direct | +3.66% | Acquired | (price as of 2026-10-02) |
| Feb. 21, 2026 | MGTX | F | 11,750 | $7.45 | $87,538 | 696,166 Direct | -1.66% | Disposed | 44.8% (price as of 2026-10-02) |
| Feb. 21, 2026 | MGTX | M | 25,000 | · | · | 25,000 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| Jan. 17, 2026 | MGTX | M | 75,000 | · | · | 718,166 Direct | +11.66% | Acquired | (price as of 2026-10-02) |
| Jan. 17, 2026 | MGTX | F | 35,250 | $7.42 | $261,555 | 682,916 Direct | -4.91% | Disposed | 45.4% (price as of 2026-10-02) |
| Jan. 17, 2026 | MGTX | M | 75,000 | · | · | 75,000 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| Jan. 7, 2026 | MGTX | M | 37,500 | · | · | 660,791 Direct | +6.02% | Acquired | (price as of 2026-10-02) |
| Jan. 7, 2026 | MGTX | F | 17,625 | $7.73 | $136,241 | 643,166 Direct | -2.67% | Disposed | 39.6% (price as of 2026-10-02) |
| Jan. 7, 2026 | MGTX | M | 37,500 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| April 3, 2025 | MGTX | A | 100,000 | · | · | 100,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 21, 2025 | MGTX | M | 50,000 | · | · | 646,791 Direct | +8.38% | Acquired | (price as of 2026-10-02) |
| Feb. 21, 2025 | MGTX | F | 23,500 | $7.30 | $171,550 | 623,291 Direct | -3.63% | Disposed | 47.8% (price as of 2026-10-02) |
| Feb. 21, 2025 | MGTX | M | 50,000 | · | · | 50,000 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| Jan. 14, 2025 | MGTX | M | 23,750 | · | · | 607,954 Direct | +4.07% | Acquired | (price as of 2026-10-02) |
| Jan. 14, 2025 | MGTX | F | 11,163 | $5.77 | $64,411 | 596,791 Direct | -1.84% | Disposed | 87.0% (price as of 2026-10-02) |
| Jan. 14, 2025 | MGTX | M | 23,750 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Jan. 7, 2025 | MGTX | M | 37,500 | · | · | 601,829 Direct | +6.65% | Acquired | (price as of 2026-10-02) |
| Jan. 7, 2025 | MGTX | F | 17,625 | $6.34 | $111,742 | 584,204 Direct | -2.93% | Disposed | 70.2% (price as of 2026-10-02) |
| Jan. 7, 2025 | MGTX | M | 37,500 | · | · | 37,500 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| Jan. 17, 2024 | MGTX | A | 150,000 | · | · | 150,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 14, 2024 | MGTX | M | 23,750 | · | · | 575,492 Direct | +4.30% | Acquired | (price as of 2026-10-02) |
| Jan. 14, 2024 | MGTX | F | 11,163 | $6.36 | $70,997 | 564,329 Direct | -1.94% | Disposed | 69.7% (price as of 2026-10-02) |
| Jan. 14, 2024 | MGTX | M | 23,750 | · | · | 23,750 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| Jan. 8, 2024 | MGTX | M | 40,000 | · | · | 570,542 Direct | +7.54% | Acquired | (price as of 2026-10-02) |
| Jan. 8, 2024 | MGTX | F | 18,800 | $6.63 | $124,644 | 551,742 Direct | -3.30% | Disposed | 62.7% (price as of 2026-10-02) |
| Jan. 8, 2024 | MGTX | M | 40,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Jan. 7, 2024 | MGTX | M | 75,000 | · | · | 565,792 Direct | +15.28% | Acquired | (price as of 2026-10-02) |
| Jan. 7, 2024 | MGTX | F | 35,250 | $6.30 | $222,075 | 530,542 Direct | -6.23% | Disposed | 71.3% (price as of 2026-10-02) |
| Jan. 7, 2024 | MGTX | M | 75,000 | · | · | 75,000 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| Feb. 21, 2023 | MGTX | A | 100,000 | · | · | 100,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 21, 2023 | MGTX | A | 100,000 | · | · | 100,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 14, 2023 | MGTX | M | 47,500 | · | · | 513,117 Direct | +10.20% | Acquired | (price as of 2026-10-02) |
| Jan. 14, 2023 | MGTX | F | 22,325 | $6.99 | $156,052 | 490,792 Direct | -4.35% | Disposed | 54.4% (price as of 2026-10-02) |
| Jan. 14, 2023 | MGTX | M | 47,500 | · | · | 47,500 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| Jan. 8, 2023 | MGTX | M | 40,000 | · | · | 484,417 Direct | +9.00% | Acquired | (price as of 2026-10-02) |
| Jan. 8, 2023 | MGTX | F | 18,800 | $6.60 | $124,080 | 465,617 Direct | -3.88% | Disposed | 63.5% (price as of 2026-10-02) |
| Jan. 8, 2023 | MGTX | M | 40,000 | · | · | 40,000 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| Jan. 8, 2022 | MGTX | M | 80,000 | · | · | 80,000 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| Jan. 8, 2022 | MGTX | F | 37,600 | $21.53 | $809,528 | 444,417 Direct | -7.80% | Disposed | -49.9% (price as of 2026-10-02) |
| Jan. 8, 2022 | MGTX | M | 80,000 | · | · | 482,017 Direct | +19.90% | Acquired | (price as of 2026-10-02) |
| Jan. 7, 2022 | MGTX | A | 150,000 | · | · | 150,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Oct. 18, 2021 | MGTX | S 10b5-1 | 12,000 | $17.95 | $215,400 | 402,017 Direct | -2.90% | Disposed | -39.9% (price as of 2026-10-02) |
| July 20, 2021 | MGTX | S 10b5-1 | 9,390 | $15.06 | $141,413 | 414,017 Direct | -2.22% | Disposed | -28.4% (price as of 2026-10-02) |
| July 13, 2021 | MGTX | S 10b5-1 | 2,610 | $15.04 | $39,254 | 423,407 Direct | -0.61% | Disposed | -28.3% (price as of 2026-10-02) |
| June 8, 2021 | MGTX | S 10b5-1 | 5,040 | $15.01 | $75,650 | 426,017 Direct | -1.17% | Disposed | -28.1% (price as of 2026-10-02) |
| June 7, 2021 | MGTX | S 10b5-1 | 1,042 | $15.02 | $15,651 | 431,057 Direct | -0.24% | Disposed | -28.2% (price as of 2026-10-02) |
| April 30, 2021 | MGTX | S 10b5-1 | 741 | $15.01 | $11,122 | 432,099 Direct | +0.17% | Acquired | -28.1% (price as of 2026-10-02) |
| April 30, 2021 | MGTX | S 10b5-1 | 741 | $15.01 | $11,122 | 432,099 Direct | -0.17% | Disposed | -28.1% (price as of 2026-10-02) |
| April 29, 2021 | MGTX | S 10b5-1 | 1,405 | $15.02 | $21,103 | 432,840 Direct | -0.32% | Disposed | -28.2% (price as of 2026-10-02) |
| April 29, 2021 | MGTX | S 10b5-1 | 1,405 | $15.02 | $21,103 | 432,840 Direct | -0.32% | Disposed | -28.2% (price as of 2026-10-02) |
| April 28, 2021 | MGTX | S 10b5-1 | 3,772 | $15.14 | $57,108 | 434,245 Direct | -0.86% | Disposed | -28.7% (price as of 2026-10-02) |
| April 28, 2021 | MGTX | S 10b5-1 | 3,772 | $15.14 | $57,108 | 434,245 Direct | -0.86% | Disposed | -28.7% (price as of 2026-10-02) |
| Jan. 14, 2021 | MGTX | A | 95,000 | · | · | 95,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 14, 2021 | MGTX | A | 35,000 | · | · | 35,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 5, 2021 | MGTX | S 10b5-1 | 6,000 | $15.34 | $92,040 | 438,017 Direct | -1.35% | Disposed | -29.7% (price as of 2026-10-02) |
| Jan. 4, 2021 | MGTX | S 10b5-1 | 6,000 | $15.40 | $92,400 | 444,017 Direct | -1.33% | Disposed | -29.9% (price as of 2026-10-02) |
| Nov. 10, 2020 | MGTX | S 10b5-1 | 4,851 | $15.00 | $72,765 | 450,017 Direct | -1.07% | Disposed | -28.1% (price as of 2026-10-02) |
| Nov. 10, 2020 | MGTX | S 10b5-1 | 3,739 | $15.00 | $56,085 | 451,129 Direct | -0.82% | Disposed | -28.1% (price as of 2026-10-02) |
| Nov. 9, 2020 | MGTX | S 10b5-1 | 512 | $15.00 | $7,680 | 454,868 Direct | -0.11% | Disposed | -28.1% (price as of 2026-10-02) |
| Nov. 5, 2020 | MGTX | S 10b5-1 | 8,282 | $15.02 | $124,396 | 455,380 Direct | -1.79% | Disposed | -28.2% (price as of 2026-10-02) |
| Oct. 5, 2020 | MGTX | S 10b5-1 | 301 | $15.00 | $4,515 | 463,662 Direct | -0.06% | Disposed | -28.1% (price as of 2026-10-02) |
| July 21, 2020 | MGTX | S 10b5-1 | 7,698 | $15.04 | $115,778 | 463,963 Direct | -1.63% | Disposed | -28.3% (price as of 2026-10-02) |
| July 20, 2020 | MGTX | S 10b5-1 | 2,356 | $15.00 | $35,340 | 471,661 Direct | -0.50% | Disposed | -28.1% (price as of 2026-10-02) |
| May 11, 2020 | MGTX | S 10b5-1 | 11,304 | $15.39 | $173,969 | 474,017 Direct | -2.33% | Disposed | -29.9% (price as of 2026-10-02) |
| April 20, 2020 | MGTX | S 10b5-1 | 696 | $15.00 | $10,440 | 485,321 Direct | -0.14% | Disposed | -28.1% (price as of 2026-10-02) |
| Feb. 19, 2020 | MGTX | S 10b5-1 | 6,000 | $17.60 | $105,600 | 486,017 Direct | -1.22% | Disposed | -38.7% (price as of 2026-10-02) |
| Feb. 18, 2020 | MGTX | S 10b5-1 | 169 | $18.96 | $3,204 | 492,017 Direct | -0.03% | Disposed | -43.1% (price as of 2026-10-02) |
| Feb. 18, 2020 | MGTX | S 10b5-1 | 5,831 | $18.30 | $106,707 | 492,186 Direct | -1.17% | Disposed | -41.0% (price as of 2026-10-02) |
| Jan. 8, 2020 | MGTX | A | 160,000 | · | · | 160,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Dec. 29, 2018 | MGTX | A | 100,000 | · | · | 100,000 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 |
|---|---|---|---|---|---|---|---|
| June 25, 2026 | MGTX | Restricted Share Units | Ordinary Shares | · | · | 70,000 | Acquired |
| Feb. 21, 2026 | MGTX | Restricted Share Units | Ordinary Shares | · | · | 25,000 | Disposed |
| Jan. 17, 2026 | MGTX | Restricted Share Units | Ordinary Shares | · | · | 75,000 | Disposed |
| Jan. 7, 2026 | MGTX | Restricted Share Units | Ordinary Shares | · | · | 37,500 | Disposed |
| April 3, 2025 | MGTX | Restricted Share Units | Ordinary Shares | · | · | 100,000 | Acquired |
| Feb. 21, 2025 | MGTX | Restricted Share Units | Ordinary Shares | · | · | 50,000 | Disposed |
| Jan. 14, 2025 | MGTX | Restricted Share Units | Ordinary Shares | · | · | 23,750 | Disposed |
| Jan. 7, 2025 | MGTX | Restricted Share Units | Ordinary Shares | · | · | 37,500 | Disposed |
| Jan. 17, 2024 | MGTX | Restricted Share Units | Ordinary Shares | · | · | 150,000 | Acquired |
| Jan. 14, 2024 | MGTX | Restricted Share Units | Ordinary Shares | · | · | 23,750 | Disposed |
| Jan. 8, 2024 | MGTX | Restricted Share Units | Ordinary Shares | · | · | 40,000 | Disposed |
| Jan. 7, 2024 | MGTX | Restricted Share Units | Ordinary Shares | · | · | 75,000 | Disposed |
| Feb. 21, 2023 | MGTX | Stock Option (Right to Buy) | Ordinary Shares | $8.60 | Feb. 21, 2033 | 100,000 | Acquired |
| Feb. 21, 2023 | MGTX | Restricted Share Units | Ordinary Shares | · | · | 100,000 | Acquired |
| Jan. 14, 2023 | MGTX | Restricted Share Units | Ordinary Shares | · | · | 47,500 | Disposed |
| Jan. 8, 2023 | MGTX | Restricted Share Units | Ordinary Shares | · | · | 40,000 | Disposed |
| Jan. 8, 2022 | MGTX | Restricted Share Units | Ordinary Shares | · | · | 80,000 | Disposed |
| Jan. 7, 2022 | MGTX | Restricted Share Units | Ordinary Shares | · | · | 150,000 | Acquired |
| Jan. 14, 2021 | MGTX | Restricted Share Units | Ordinary Shares | · | · | 95,000 | Acquired |
| Jan. 14, 2021 | MGTX | Stock Option (Right to Buy) | Ordinary Shares | $16.43 | Jan. 13, 2031 | 35,000 | Acquired |
| Jan. 8, 2020 | MGTX | Restricted Share Units | Ordinary Shares | · | · | 160,000 | Acquired |
| Dec. 29, 2018 | MGTX | Stock Option | Ordinary Shares | $9.64 | Dec. 29, 2028 | 100,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 4 holdings
Securities held when first becoming an insider, per SEC Form 3.
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 |
|---|---|---|---|---|---|---|---|---|
| 2020 | $424,908 | $720,000 | · | · | · | · | $42,491 | $4,435,399 |
| 2018 | $352,000 | $750,000 | · | $1,108,372 | · | · | $35,200 | $2,245,572 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.