Thomas Spitznagel
Insider
First SEC filing: May 27, 2016 · Latest: May 27, 2016
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net: $0
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 |
|---|---|---|---|---|---|---|---|---|---|
| Feb. 15, 2026 | MGNX | M | 13,332 | · | · | 44,063 Direct | +43.38% | Acquired | (price as of 2026-10-02) |
| Feb. 15, 2026 | MGNX | F | 5,520 | $1.71 | $9,439 | 38,543 Direct | -12.53% | Disposed | 109.4% (price as of 2026-10-02) |
| Feb. 15, 2026 | MGNX | M | 13,332 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Feb. 12, 2026 | MGNX | A | 25,000 | · | · | 25,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 12, 2026 | MGNX | A | 150,000 | · | · | 150,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 8, 2026 | MGNX | M | 8,999 | · | · | 33,917 Direct | +36.11% | Acquired | (price as of 2026-10-02) |
| Feb. 8, 2026 | MGNX | F | 3,186 | $1.81 | $5,767 | 30,731 Direct | -9.39% | Disposed | 97.8% (price as of 2026-10-02) |
| Feb. 8, 2026 | MGNX | M | 8,999 | · | · | 9,000 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| Feb. 7, 2026 | MGNX | M | 6,001 | · | · | 27,403 Direct | +28.04% | Acquired | (price as of 2026-10-02) |
| Feb. 7, 2026 | MGNX | F | 2,485 | $1.81 | $4,498 | 24,918 Direct | -9.07% | Disposed | 97.8% (price as of 2026-10-02) |
| Feb. 7, 2026 | MGNX | M | 6,001 | · | · | 11,999 Direct | -33.34% | Disposed | (price as of 2026-10-02) |
| Aug. 15, 2025 | MGNX | A | 30,000 | · | · | 30,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 15, 2025 | MGNX | M | 13,332 | · | · | 13,332 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| Feb. 15, 2025 | MGNX | F | 5,520 | $2.56 | $14,131 | 21,402 Direct | -20.50% | Disposed | 39.8% (price as of 2026-10-02) |
| Feb. 15, 2025 | MGNX | M | 13,332 | · | · | 26,922 Direct | +98.10% | Acquired | (price as of 2026-10-02) |
| Feb. 8, 2025 | MGNX | M | 9,001 | · | · | 17,999 Direct | -33.34% | Disposed | (price as of 2026-10-02) |
| Feb. 8, 2025 | MGNX | F | 3,727 | $2.60 | $9,690 | 13,590 Direct | -21.52% | Disposed | 37.7% (price as of 2026-10-02) |
| Feb. 8, 2025 | MGNX | M | 9,001 | · | · | 17,317 Direct | +108.24% | Acquired | (price as of 2026-10-02) |
| Feb. 7, 2025 | MGNX | A | 18,000 | · | · | 18,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 7, 2025 | MGNX | A | 105,000 | · | · | 105,000 Direct | · | Acquired | (price as of 2026-10-02) |
| March 4, 2024 | MGNX | M | 10,000 | · | · | 77,000 Direct | -11.49% | Disposed | (price as of 2026-10-02) |
| March 4, 2024 | MGNX | S 10b5-1 | 10,000 | $20.00 | $200,000 | 8,316 Direct | -54.60% | Disposed | -82.1% (price as of 2026-10-02) |
| March 4, 2024 | MGNX | M | 10,000 | $11.50 | $115,000 | 18,316 Direct | +120.25% | Acquired | -68.9% (price as of 2026-10-02) |
| Feb. 15, 2024 | MGNX | M | 13,336 | · | · | 26,664 Direct | -33.34% | Disposed | (price as of 2026-10-02) |
| Feb. 15, 2024 | MGNX | F | 5,020 | $17.40 | $87,348 | 8,316 Direct | -37.64% | Disposed | -79.4% (price as of 2026-10-02) |
| Feb. 15, 2024 | MGNX | M | 13,336 | · | · | 13,336 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 8, 2024 | MGNX | A | 27,000 | · | · | 27,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 8, 2024 | MGNX | A | 71,000 | · | · | 71,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 15, 2023 | MGNX | A | 40,000 | · | · | 40,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 15, 2023 | MGNX | A | 170,000 | · | · | 170,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 22, 2022 | MGNX | A | 140,000 | · | · | 140,000 Direct | · | Acquired | (price as of 2026-10-02) |
| July 16, 2021 | MGNX | M | 5,000 | $7.51 | $37,550 | 37,147 Direct | -11.86% | Disposed | -52.3% (price as of 2026-10-02) |
| July 16, 2021 | MGNX | S 10b5-1 | 5,000 | $25.01 | $125,050 | 0 Direct | -100.00% | Disposed | -85.7% (price as of 2026-10-02) |
| July 16, 2021 | MGNX | M | 5,000 | $7.51 | $37,550 | 5,000 Direct | · | Acquired | -52.3% (price as of 2026-10-02) |
| April 15, 2021 | MGNX | M | 5,000 | $7.51 | $37,550 | 42,147 Direct | -10.61% | Disposed | -52.3% (price as of 2026-10-02) |
| April 15, 2021 | MGNX | S 10b5-1 | 5,000 | $30.91 | $154,550 | 0 Direct | -100.00% | Disposed | -88.4% (price as of 2026-10-02) |
| April 15, 2021 | MGNX | M | 5,000 | $7.51 | $37,550 | 5,000 Direct | · | Acquired | -52.3% (price as of 2026-10-02) |
| Feb. 22, 2021 | MGNX | A | 95,000 | · | · | 95,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Aug. 20, 2020 | MGNX | M | 7,500 | · | · | 47,147 Direct | -13.72% | Disposed | (price as of 2026-10-02) |
| Aug. 20, 2020 | MGNX | S 10b5-1 | 7,500 | $26.87 | $201,525 | 0 Direct | -100.00% | Disposed | -86.7% (price as of 2026-10-02) |
| Aug. 20, 2020 | MGNX | M | 7,500 | $7.51 | $56,325 | 7,500 Direct | · | Acquired | -52.3% (price as of 2026-10-02) |
| May 20, 2020 | MGNX | M | 7,500 | · | · | 54,647 Direct | -12.07% | Disposed | (price as of 2026-10-02) |
| May 20, 2020 | MGNX | S 10b5-1 | 7,500 | $25.30 | $189,750 | 0 Direct | -100.00% | Disposed | -85.8% (price as of 2026-10-02) |
| May 20, 2020 | MGNX | M | 7,500 | $7.51 | $56,325 | 7,500 Direct | · | Acquired | -52.3% (price as of 2026-10-02) |
| Feb. 20, 2020 | MGNX | A | 87,000 | $11.50 | $1,000,500 | 87,000 Direct | · | Acquired | -68.9% (price as of 2026-10-02) |
| Feb. 21, 2019 | MGNX | A | 70,000 | · | · | 70,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 6, 2019 | MGNX | M | 1,770 | · | · | 62,147 Direct | -2.77% | Disposed | (price as of 2026-10-02) |
| Feb. 6, 2019 | MGNX | S 10b5-1 | 1,770 | $30.00 | $53,100 | 0 Direct | -100.00% | Disposed | -88.1% (price as of 2026-10-02) |
| Feb. 6, 2019 | MGNX | M | 1,770 | $7.51 | $13,293 | 1,770 Direct | · | Acquired | -52.3% (price as of 2026-10-02) |
| March 2, 2018 | MGNX | A | 50,000 | · | · | 50,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 15, 2017 | MGNX | A | 45,000 | $20.53 | $923,850 | 45,000 Direct | · | Acquired | -82.6% (price as of 2026-10-02) |
| Sept. 14, 2016 | MGNX | A | 20,000 | · | · | 20,000 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 |
|---|---|---|---|---|---|---|---|
| Feb. 15, 2026 | MGNX | Restricted Stock Unit | Common Stock | · | · | 13,332 | Disposed |
| Feb. 12, 2026 | MGNX | Restricted Stock Unit | Common Stock | · | · | 25,000 | Acquired |
| Feb. 12, 2026 | MGNX | Employee Stock Option (right to buy) | Common Stock | $1.71 | Feb. 12, 2036 | 150,000 | Acquired |
| Feb. 8, 2026 | MGNX | Restricted Stock Unit | Common Stock | · | · | 8,999 | Disposed |
| Feb. 7, 2026 | MGNX | Restricted Stock Unit | Common Stock | · | · | 6,001 | Disposed |
| Aug. 15, 2025 | MGNX | Employee Stock Option (right to buy) | Common Stock | $1.58 | Aug. 15, 2035 | 30,000 | Acquired |
| Feb. 15, 2025 | MGNX | Restricted Stock Unit | Common Stock | · | · | 13,332 | Disposed |
| Feb. 8, 2025 | MGNX | Restricted Stock Unit | Common Stock | · | · | 9,001 | Disposed |
| Feb. 7, 2025 | MGNX | Restricted Stock Unit | Common Stock | · | · | 18,000 | Acquired |
| Feb. 7, 2025 | MGNX | Employee Stock Option (right to buy) | Common Stock | $2.60 | Feb. 7, 2035 | 105,000 | Acquired |
| March 4, 2024 | MGNX | Employee stock option (right to buy) | Common Stock | $11.50 | Feb. 20, 2030 | 10,000 | Disposed |
| Feb. 15, 2024 | MGNX | Restricted Stock Unit | Common Stock | · | · | 13,336 | Disposed |
| Feb. 8, 2024 | MGNX | Restricted Stock Unit | Common Stock | · | · | 27,000 | Acquired |
| Feb. 8, 2024 | MGNX | Employee Stock Option (right to buy) | Common Stock | $18.30 | Feb. 8, 2034 | 71,000 | Acquired |
| Feb. 15, 2023 | MGNX | Restricted Stock Unit | Common Stock | · | · | 40,000 | Acquired |
| Feb. 15, 2023 | MGNX | Employee stock option (right to buy) | Common Stock | $4.82 | Feb. 15, 2033 | 170,000 | Acquired |
| Feb. 22, 2022 | MGNX | Employee stock option (right to buy) | Common Stock | $10.15 | Feb. 22, 2032 | 140,000 | Acquired |
| July 16, 2021 | MGNX | Employee stock option (right to buy) | Common Stock | $7.51 | Sept. 17, 2023 | 5,000 | Disposed |
| April 15, 2021 | MGNX | Employee stock option (right to buy) | Common Stock | $7.51 | Sept. 17, 2023 | 5,000 | Disposed |
| Feb. 22, 2021 | MGNX | Employee stock option (right to buy) | Common Stock | $19.18 | Feb. 22, 2031 | 95,000 | Acquired |
| Aug. 20, 2020 | MGNX | Employee stock option (right to buy) | Common Stock | $7.51 | Sept. 17, 2023 | 7,500 | Disposed |
| May 20, 2020 | MGNX | Employee stock option (right to buy) | Common Stock | $7.51 | Sept. 17, 2023 | 7,500 | Disposed |
| Feb. 20, 2020 | MGNX | Employee stock option (right to buy) | Common Stock | $11.50 | Feb. 20, 2030 | 87,000 | Acquired |
| Feb. 21, 2019 | MGNX | Employee stock option (right to buy) | Common Stock | $21.88 | Feb. 21, 2029 | 70,000 | Acquired |
| Feb. 6, 2019 | MGNX | Employee stock option (right to buy) | Common Stock | $7.51 | Sept. 17, 2023 | 1,770 | Disposed |
| March 2, 2018 | MGNX | Employee stock option (right to buy) | Common Stock | $28.94 | March 2, 2028 | 50,000 | Acquired |
| Feb. 15, 2017 | MGNX | Common Stock | Common Stock | $20.53 | Feb. 15, 2027 | 45,000 | Acquired |
| Sept. 14, 2016 | MGNX | Employee Stock Option (right to buy) | Common Stock | $28.94 | Sept. 14, 2026 | 20,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 6 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| May 27, 2016 | MGNX | Employee Stock Option (right to buy) | 11,985 | Direct |
| May 27, 2016 | MGNX | Employee Stock Option (right to buy) | 51,932 | Direct |
| May 27, 2016 | MGNX | Employee Stock Option (right to buy) | 16,295 | Direct |
| May 27, 2016 | MGNX | Employee Stock Option (right to buy) | 3,705 | Direct |
| May 27, 2016 | MGNX | Employee Stock Option (right to buy) | 9,619 | Direct |
| May 27, 2016 | MGNX | Employee Stock Option (right to buy) | 3,181 | Direct |
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 |
|---|---|---|---|---|---|---|---|---|
| 2021 | $409,972 | · | · | $1,328,091 | $132,302 | · | $8,700 | $1,879,065 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.