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David C Stump
Insider
First SEC filing: May 26, 2017 · Latest: May 26, 2017
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
No open-market trades on record; showing all filings.
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| May 29, 2026 | RGNX | A | 46,600 | · | · | 46,600 Direct | · | Acquired | (price as of 2026-10-05) |
| May 29, 2026 | RGNX | A | 9,807 | · | · | 28,861 Direct | +51.47% | Acquired | (price as of 2026-10-05) |
| May 19, 2026 | MGNX | A | 22,000 | · | · | 22,000 Direct | · | Acquired | (price as of 2026-10-05) |
| May 19, 2026 | MGNX | A | 3,750 | · | · | 3,750 Direct | · | Acquired | (price as of 2026-10-05) |
| May 18, 2026 | MGNX | M | 3,750 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| May 18, 2026 | MGNX | M | 3,750 | · | · | 14,750 Direct | +34.09% | Acquired | (price as of 2026-10-05) |
| May 30, 2025 | RGNX | A | 7,768 | · | · | 19,054 Direct | +68.83% | Acquired | (price as of 2026-10-05) |
| May 30, 2025 | RGNX | A | 39,815 | · | · | 39,815 Direct | · | Acquired | (price as of 2026-10-05) |
| May 21, 2025 | MGNX | A | 22,000 | · | · | 22,000 Direct | · | Acquired | (price as of 2026-10-05) |
| May 21, 2025 | MGNX | A | 3,750 | · | · | 3,750 Direct | · | Acquired | (price as of 2026-10-05) |
| May 20, 2025 | MGNX | M | 6,500 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| May 20, 2025 | MGNX | M | 6,500 | · | · | 11,000 Direct | +144.44% | Acquired | (price as of 2026-10-05) |
| May 31, 2024 | RGNX | A | 4,790 | · | · | 11,286 Direct | +73.74% | Acquired | (price as of 2026-10-05) |
| May 31, 2024 | RGNX | A | 24,454 | · | · | 24,454 Direct | · | Acquired | (price as of 2026-10-05) |
| May 21, 2024 | MGNX | A | 16,500 | · | · | 16,500 Direct | · | Acquired | (price as of 2026-10-05) |
| May 21, 2024 | MGNX | A | 6,500 | · | · | 6,500 Direct | · | Acquired | (price as of 2026-10-05) |
| May 20, 2024 | MGNX | M | 4,500 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| May 20, 2024 | MGNX | M | 4,500 | · | · | 4,500 Direct | · | Acquired | (price as of 2026-10-05) |
| June 2, 2023 | RGNX | A | 3,486 | · | · | 6,496 Direct | +115.81% | Acquired | (price as of 2026-10-05) |
| June 2, 2023 | RGNX | A | 17,892 | · | · | 17,892 Direct | · | Acquired | (price as of 2026-10-05) |
| May 31, 2023 | MGNX | A | 4,500 | · | · | 4,500 Direct | · | Acquired | (price as of 2026-10-05) |
| May 31, 2023 | MGNX | A | 19,000 | · | · | 19,000 Direct | · | Acquired | (price as of 2026-10-05) |
| June 3, 2022 | RGNX | A | 3,010 | · | · | 3,010 Direct | · | Acquired | (price as of 2026-10-05) |
| June 3, 2022 | RGNX | A | 15,324 | · | · | 15,324 Direct | · | Acquired | (price as of 2026-10-05) |
| May 19, 2022 | MGNX | A | 18,000 | · | · | 18,000 Direct | · | Acquired | (price as of 2026-10-05) |
| June 4, 2021 | RGNX | A | 10,000 | · | · | 10,000 Direct | · | Acquired | (price as of 2026-10-05) |
| May 13, 2021 | MGNX | A | 15,000 | · | · | 15,000 Direct | · | Acquired | (price as of 2026-10-05) |
| May 29, 2020 | RGNX | A | 10,000 | · | · | 10,000 Direct | · | Acquired | (price as of 2026-10-05) |
| May 14, 2020 | MGNX | A | 15,000 | · | · | 15,000 Direct | · | Acquired | (price as of 2026-10-05) |
| May 31, 2019 | RGNX | A | 10,000 | · | · | 10,000 Direct | · | Acquired | (price as of 2026-10-05) |
| May 16, 2019 | MGNX | A | 10,000 | · | · | 10,000 Direct | · | Acquired | (price as of 2026-10-05) |
| May 25, 2018 | RGNX | A | 12,500 | · | · | 12,500 Direct | · | Acquired | (price as of 2026-10-05) |
| May 17, 2018 | MGNX | A | 10,000 | · | · | 10,000 Direct | · | Acquired | (price as of 2026-10-05) |
| May 24, 2017 | RGNX | A | 12,500 | · | · | 12,500 Direct | · | Acquired | (price as of 2026-10-05) |
| May 18, 2017 | MGNX | A | 10,000 | · | · | 10,000 Direct | · | Acquired | (price as of 2026-10-05) |
| June 1, 2016 | RGNX | A | 12,500 | · | · | 12,500 Direct | · | Acquired | (price as of 2026-10-05) |
| May 18, 2016 | MGNX | A | 8,500 | · | · | 8,500 Direct | · | Acquired | (price as of 2026-10-05) |
| Oct. 14, 2015 | RGNX | A | 25,000 | · | · | 25,000 Direct | · | Acquired | (price as of 2026-10-05) |
| May 20, 2015 | MGNX | A | 8,500 | · | · | 8,500 Direct | · | Acquired | (price as of 2026-10-05) |
| June 5, 2014 | MGNX | A | 6,924 | · | · | 6,924 Direct | · | Acquired | (price as of 2026-10-05) |
| Oct. 9, 2013 | MGNX | A | 13,849 | · | · | 13,849 Direct | · | Acquired | (price as of 2026-10-05) |
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 |
|---|---|---|---|---|---|---|---|
| May 29, 2026 | RGNX | Stock Options (Right to Buy) | Common Stock | $7.01 | May 29, 2036 | 46,600 | Acquired |
| May 19, 2026 | MGNX | Stock Option (right to buy) | Common Stock | $4.52 | May 19, 2036 | 22,000 | Acquired |
| May 19, 2026 | MGNX | Restricted Stock Unit | Common Stock | · | · | 3,750 | Acquired |
| May 18, 2026 | MGNX | Restricted Stock Unit | Common Stock | · | · | 3,750 | Disposed |
| May 30, 2025 | RGNX | Stock Options (Right to Buy) | Common Stock | $8.85 | May 30, 2035 | 39,815 | Acquired |
| May 21, 2025 | MGNX | Stock Option (right to buy) | Common Stock | $1.49 | May 21, 2035 | 22,000 | Acquired |
| May 21, 2025 | MGNX | Restricted Stock Unit | Common Stock | · | · | 3,750 | Acquired |
| May 20, 2025 | MGNX | Restricted Stock Unit | Common Stock | · | · | 6,500 | Disposed |
| May 31, 2024 | RGNX | Stock Options (Right to Buy) | Common Stock | $14.35 | May 31, 2034 | 24,454 | Acquired |
| May 21, 2024 | MGNX | Stock Option (right to buy) | Common Stock | $4.26 | May 21, 2034 | 16,500 | Acquired |
| May 21, 2024 | MGNX | Restricted Stock Unit | Common Stock | · | · | 6,500 | Acquired |
| May 20, 2024 | MGNX | Restricted Stock Unit | Common Stock | · | · | 4,500 | Disposed |
| June 2, 2023 | RGNX | Stock Options (Right to Buy) | Common Stock | $19.72 | June 2, 2033 | 17,892 | Acquired |
| May 31, 2023 | MGNX | Restricted Stock Unit | Common Stock | · | · | 4,500 | Acquired |
| May 31, 2023 | MGNX | Stock Option (right to buy) | Common Stock | $4.67 | May 31, 2033 | 19,000 | Acquired |
| June 3, 2022 | RGNX | Stock Option (Right to Buy) | Common Stock | $22.84 | June 3, 2032 | 15,324 | Acquired |
| May 19, 2022 | MGNX | Stock Option (right to buy) | Common Stock | $3.90 | May 19, 2032 | 18,000 | Acquired |
| June 4, 2021 | RGNX | Stock Option (Right to Buy) | Common Stock | $35.52 | June 4, 2031 | 10,000 | Acquired |
| May 13, 2021 | MGNX | Stock Option (right to buy) | Common Stock | $28.88 | May 13, 2031 | 15,000 | Acquired |
| May 29, 2020 | RGNX | Stock Option (Right to Buy) | Common Stock | $37.66 | May 29, 2030 | 10,000 | Acquired |
| May 14, 2020 | MGNX | Stock Option (right to buy) | Common Stock | $24.97 | May 14, 2030 | 15,000 | Acquired |
| May 31, 2019 | RGNX | Stock Option (Right to Buy) | Common Stock | $43.02 | May 31, 2029 | 10,000 | Acquired |
| May 16, 2019 | MGNX | Stock Option (right to buy) | Common Stock | $18.00 | May 16, 2029 | 10,000 | Acquired |
| May 25, 2018 | RGNX | Stock Option (Right to Buy) | Common Stock | $49.45 | May 25, 2028 | 12,500 | Acquired |
| May 17, 2018 | MGNX | Stock Option (right to buy) | Common Stock | $21.34 | May 17, 2028 | 10,000 | Acquired |
| May 24, 2017 | RGNX | Stock Option (Right to Buy) | Common Stock | $18.85 | May 24, 2027 | 12,500 | Acquired |
| May 18, 2017 | MGNX | Stock Option (right to buy) | Common Stock | $19.57 | May 18, 2027 | 10,000 | Acquired |
| June 1, 2016 | RGNX | Stock Option (Right to Buy) | Common Stock | $12.74 | June 1, 2026 | 12,500 | Acquired |
| May 18, 2016 | MGNX | Stock Option (right to buy) | Common Stock | $21.06 | May 18, 2026 | 8,500 | Acquired |
| Oct. 14, 2015 | RGNX | Stock Option (Right to Buy) | Common Stock | $17.89 | Oct. 14, 2025 | 25,000 | Acquired |
| May 20, 2015 | MGNX | Stock Option (right to buy) | Common Stock | $32.34 | May 20, 2025 | 8,500 | Acquired |
| June 5, 2014 | MGNX | Stock Option (right to buy) | Common Stock | $20.15 | June 5, 2024 | 6,924 | Acquired |
| Oct. 9, 2013 | MGNX | Stock Option (right to buy) | Common Stock | $16.00 | Oct. 9, 2023 | 13,849 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).