Thierry Mabru
Insider
First SEC filing: June 1, 2026 · Latest: June 1, 2026
Insider at
Insider transactions
0 buys (P)
1 sells (S)
Net: $-2,310,000
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 |
|---|---|---|---|---|---|---|---|---|---|
| May 29, 2026 | GTX | S | 70,000 | $33.00 | $2,310,000 | 147,956 Direct | -32.12% | Disposed | -18.0% (price as of 2026-10-02) |
| April 30, 2026 | GTX | F | 7,396 | $25.61 | $189,412 | 217,956 Direct | -3.28% | Disposed | 5.7% (price as of 2026-10-02) |
| March 5, 2026 | GTX | A | 23,612 | · | · | 225,352 Direct | +11.70% | Acquired | (price as of 2026-10-02) |
| March 5, 2026 | GTX | F | 12,283 | $18.87 | $231,780 | 201,740 Direct | -5.74% | Disposed | 43.5% (price as of 2026-10-02) |
| Feb. 17, 2026 | GTX | F | 48,907 | $20.62 | $1,008,462 | 214,023 Direct | -18.60% | Disposed | 31.3% (price as of 2026-10-02) |
| Feb. 17, 2026 | GTX | F | 6,561 | $20.62 | $135,288 | 262,930 Direct | -2.43% | Disposed | 31.3% (price as of 2026-10-02) |
| Feb. 11, 2026 | GTX | A | 108,679 | · | · | 269,491 Direct | +67.58% | Acquired | (price as of 2026-10-02) |
| April 30, 2025 | GTX | F | 7,394 | $9.22 | $68,173 | 160,812 Direct | -4.40% | Disposed | 193.6% (price as of 2026-10-02) |
| March 5, 2025 | GTX | A | 40,470 | · | · | 168,206 Direct | +31.68% | Acquired | (price as of 2026-10-02) |
| March 5, 2025 | GTX | F | 6,212 | $9.35 | $58,082 | 127,736 Direct | -4.64% | Disposed | 189.5% (price as of 2026-10-02) |
| Feb. 17, 2025 | GTX | F | 6,561 | $9.20 | $60,361 | 133,948 Direct | -4.67% | Disposed | 194.2% (price as of 2026-10-02) |
| Oct. 29, 2024 | GTX | S | 50,000 | $7.47 | $373,500 | 140,509 Direct | -26.25% | Disposed | 262.4% (price as of 2026-10-02) |
| April 30, 2024 | GTX | F | 7,394 | $9.56 | $70,687 | 190,509 Direct | -3.74% | Disposed | 183.2% (price as of 2026-10-02) |
| March 5, 2024 | GTX | A | 41,412 | · | · | 197,903 Direct | +26.46% | Acquired | (price as of 2026-10-02) |
| Feb. 17, 2024 | GTX | F | 782 | $9.50 | $7,429 | 123,262 Direct | -0.63% | Disposed | 184.9% (price as of 2026-10-02) |
| Feb. 15, 2024 | GTX | A | 33,229 | · | · | 156,491 Direct | +26.96% | Acquired | (price as of 2026-10-02) |
| April 30, 2023 | GTX | F | 881 | $8.26 | $7,277 | 124,044 Direct | -0.71% | Disposed | 227.7% (price as of 2026-10-02) |
| Feb. 17, 2023 | GTX | A | 43,734 | · | · | 124,925 Direct | +53.87% | Acquired | (price as of 2026-10-02) |
| April 30, 2022 | GTX | F | 963 | $6.67 | $6,423 | 81,191 Direct | -1.17% | Disposed | 305.8% (price as of 2026-10-02) |
| May 26, 2021 | GTX | A | 82,154 | · | · | 82,154 Direct | · | Acquired | (price as of 2026-10-02) |
| April 30, 2021 | GTX | D | 20,108 | $6.25 | $125,675 | 158,454 Direct | -11.26% | Disposed | 333.1% (price as of 2026-10-02) |
| April 30, 2021 | GTX | D | 77,062 | $6.25 | $481,638 | 81,392 Direct | -48.63% | Disposed | 333.1% (price as of 2026-10-02) |
| April 30, 2021 | GTX | D | 81,392 | $6.25 | $508,700 | 0 Direct | -100.00% | Disposed | 333.1% (price as of 2026-10-02) |
| Feb. 28, 2021 | GTX | F | 319 | $6.60 | $2,105 | 158,454 Direct | -0.20% | Disposed | 310.2% (price as of 2026-10-02) |
| Feb. 27, 2021 | GTX | F | 829 | $6.60 | $5,471 | 158,773 Direct | -0.52% | Disposed | 310.2% (price as of 2026-10-02) |
| July 31, 2020 | GTX | F | 559 | $5.94 | $3,320 | 159,602 Direct | -0.35% | Disposed | 355.7% (price as of 2026-10-02) |
| July 1, 2020 | GTX | D | 38,124 | · | · | 160,161 Direct | -19.23% | Disposed | (price as of 2026-10-02) |
| March 15, 2020 | GTX | F | 995 | $4.37 | $4,348 | 198,285 Direct | -0.50% | Disposed | 519.5% (price as of 2026-10-02) |
| March 3, 2020 | GTX | F | 1,680 | $6.79 | $11,407 | 199,280 Direct | -0.84% | Disposed | 298.7% (price as of 2026-10-02) |
| March 3, 2020 | GTX | S | 10,000 | $6.56 | $65,600 | 200,960 Direct | -4.74% | Disposed | 312.7% (price as of 2026-10-02) |
| Feb. 28, 2020 | GTX | A | 38,124 | · | · | 210,960 Direct | +22.06% | Acquired | (price as of 2026-10-02) |
| Dec. 3, 2019 | GTX | S | 42,297 | $11.59 | $490,222 | 172,836 Direct | -19.66% | Disposed | 133.6% (price as of 2026-10-02) |
| July 27, 2019 | GTX | F | 433 | $14.57 | $6,309 | 215,133 Direct | -0.20% | Disposed | 85.8% (price as of 2026-10-02) |
| July 25, 2019 | GTX | F | 997 | $14.35 | $14,307 | 215,566 Direct | -0.46% | Disposed | 88.6% (price as of 2026-10-02) |
| March 4, 2019 | GTX | A | 22,331 | · | · | 22,331 Direct | · | Acquired | (price as of 2026-10-02) |
| March 4, 2019 | GTX | A | 10,054 | · | · | 218,678 Direct | +4.82% | Acquired | (price as of 2026-10-02) |
| Feb. 28, 2019 | GTX | M | 5,428 | · | · | 10,857 Direct | -33.33% | Disposed | (price as of 2026-10-02) |
| Feb. 28, 2019 | GTX | F | 309 | $16.61 | $5,132 | 35,050 Direct | -0.87% | Disposed | 63.0% (price as of 2026-10-02) |
| Feb. 28, 2019 | GTX | M | 5,428 | · | · | 35,359 Direct | +18.14% | Acquired | (price as of 2026-10-02) |
| Feb. 27, 2019 | GTX | M | 2,780 | · | · | 8,342 Direct | -25.00% | Disposed | (price as of 2026-10-02) |
| Feb. 27, 2019 | GTX | F | 159 | $16.76 | $2,665 | 29,931 Direct | -0.53% | Disposed | 61.5% (price as of 2026-10-02) |
| Feb. 27, 2019 | GTX | M | 2,780 | · | · | 30,090 Direct | +10.18% | Acquired | (price as of 2026-10-02) |
| Feb. 26, 2019 | GTX | M | 6,859 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Feb. 26, 2019 | GTX | F | 390 | $16.68 | $6,505 | 27,310 Direct | -1.41% | Disposed | 62.3% (price as of 2026-10-02) |
| Feb. 26, 2019 | GTX | M | 6,859 | · | · | 27,700 Direct | +32.91% | Acquired | (price as of 2026-10-02) |
| Feb. 25, 2019 | GTX | M | 14,351 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Feb. 25, 2019 | GTX | M | 7,747 | · | · | 7,747 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| Feb. 25, 2019 | GTX | F | 816 | $16.22 | $13,236 | 20,841 Direct | -3.77% | Disposed | 66.9% (price as of 2026-10-02) |
| Feb. 25, 2019 | GTX | M | 14,351 | · | · | 21,657 Direct | +196.43% | Acquired | (price as of 2026-10-02) |
| Feb. 25, 2019 | GTX | F | 441 | $16.22 | $7,153 | 7,306 Direct | -5.69% | Disposed | 66.9% (price as of 2026-10-02) |
| Feb. 25, 2019 | GTX | M | 7,747 | · | · | 7,747 Direct | · | Acquired | (price as of 2026-10-02) |
| Oct. 1, 2018 | GTX | A | 17,036 | · | · | 17,036 Direct | · | Acquired | (price as of 2026-10-02) |
| Oct. 1, 2018 | GTX | A | 17,523 | · | · | 17,523 Direct | · | Acquired | (price as of 2026-10-02) |
| Oct. 1, 2018 | GTX | A | 19,452 | · | · | 19,452 Direct | · | Acquired | (price as of 2026-10-02) |
| Oct. 1, 2018 | GTX | A | 14,351 | · | · | 14,351 Direct | · | Acquired | (price as of 2026-10-02) |
| Oct. 1, 2018 | GTX | A | 12,870 | · | · | 12,870 Direct | · | Acquired | (price as of 2026-10-02) |
| Oct. 1, 2018 | GTX | A | 23,032 | · | · | 23,032 Direct | · | Acquired | (price as of 2026-10-02) |
| Oct. 1, 2018 | GTX | A | 11,350 | · | · | 11,350 Direct | · | Acquired | (price as of 2026-10-02) |
| Oct. 1, 2018 | GTX | A | 6,859 | · | · | 6,859 Direct | · | Acquired | (price as of 2026-10-02) |
| Oct. 1, 2018 | GTX | A | 15,494 | · | · | 15,494 Direct | · | Acquired | (price as of 2026-10-02) |
| Oct. 1, 2018 | GTX | A | 16,285 | · | · | 16,285 Direct | · | Acquired | (price as of 2026-10-02) |
| Oct. 1, 2018 | GTX | A | 11,122 | · | · | 11,122 Direct | · | Acquired | (price as of 2026-10-02) |
| Oct. 1, 2018 | GTX | A | 43,250 | · | · | 43,250 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 |
|---|---|---|---|---|---|---|---|
| March 4, 2019 | GTX | Employee Stock Option (Right to Buy) | Common Stock | $16.17 | March 3, 2029 | 22,331 | Acquired |
| Feb. 28, 2019 | GTX | Restricted Stock Units | Common Stock | · | · | 5,428 | Disposed |
| Feb. 27, 2019 | GTX | Restricted Stock Units | Common Stock | · | · | 2,780 | Disposed |
| Feb. 26, 2019 | GTX | Restricted Stock Units | Common Stock | · | · | 6,859 | Disposed |
| Feb. 25, 2019 | GTX | Restricted Stock Units | Common Stock | · | · | 14,351 | Disposed |
| Feb. 25, 2019 | GTX | Restricted Stock Units | Common Stock | · | · | 7,747 | Disposed |
| Oct. 1, 2018 | GTX | Restricted Stock Units | Common Stock | · | · | 17,036 | Acquired |
| Oct. 1, 2018 | GTX | Restricted Stock Units | Common Stock | · | · | 17,523 | Acquired |
| Oct. 1, 2018 | GTX | Restricted Stock Units | Common Stock | · | · | 19,452 | Acquired |
| Oct. 1, 2018 | GTX | Restricted Stock Units | Common Stock | · | · | 14,351 | Acquired |
| Oct. 1, 2018 | GTX | Restricted Stock Units | Common Stock | · | · | 12,870 | Acquired |
| Oct. 1, 2018 | GTX | Restricted Stock Units | Common Stock | · | · | 23,032 | Acquired |
| Oct. 1, 2018 | GTX | Restricted Stock Units | Common Stock | · | · | 11,350 | Acquired |
| Oct. 1, 2018 | GTX | Restricted Stock Units | Common Stock | · | · | 6,859 | Acquired |
| Oct. 1, 2018 | GTX | Restricted Stock Units | Common Stock | · | · | 15,494 | Acquired |
| Oct. 1, 2018 | GTX | Restricted Stock Units | Common Stock | · | · | 16,285 | Acquired |
| Oct. 1, 2018 | GTX | Restricted Stock Units | Common Stock | · | · | 11,122 | Acquired |
| Oct. 1, 2018 | GTX | Restricted Stock Units | Common Stock | · | · | 43,250 | 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 | $573,704 | · | · | · | $460,828 | $165,093 | $29,681 | $2,292,141 |
| 2024 | $495,990 | · | $1,110,256 | · | $476,768 | $158,035 | $22,916 | $2,263,965 |
| 2023 | $523,383 | · | $1,020,533 | · | $549,620 | $123,053 | $24,591 | $2,241,179 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.