Federica F. O'Brien
CIK 1140119 · View on SEC EDGAR ↗
Insider
First SEC filing: Nov. 7, 2019 · Latest: Nov. 7, 2019
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 29 non-open-market transactions below
last 12 months, based on the transactions shown below
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 19, 2026 | MGNX | A | 3,750 | — | — | 3,750 Direct | — | Acquired | (price as of 2026-08-21) |
| May 19, 2026 | MGNX | A | 22,000 | — | — | 22,000 Direct | — | Acquired | (price as of 2026-08-21) |
| May 18, 2026 | MGNX | M | 3,750 | — | — | 0 Direct | -100.00% | Disposed | (price as of 2026-08-21) |
| May 18, 2026 | MGNX | M | 3,750 | — | — | 14,750 Direct | +34.09% | Acquired | (price as of 2026-08-21) |
| May 28, 2025 | TELA | A | 11,700 | — | — | 11,700 Direct | — | Acquired | (price as of 2026-08-21) |
| May 28, 2025 | TELA | A | 7,950 | — | — | 18,470 Direct | +75.57% | Acquired | (price as of 2026-08-21) |
| May 21, 2025 | MGNX | A | 64,961 | $1.27 | $82,500 | 86,961 Direct | +295.28% | Acquired | 228.7% (price as of 2026-08-21) |
| May 21, 2025 | MGNX | A | 22,000 | — | — | 22,000 Direct | — | Acquired | (price as of 2026-08-21) |
| May 21, 2025 | MGNX | A | 3,750 | — | — | 3,750 Direct | — | Acquired | (price as of 2026-08-21) |
| May 20, 2025 | MGNX | M | 6,500 | — | — | 0 Direct | -100.00% | Disposed | (price as of 2026-08-21) |
| May 20, 2025 | MGNX | M | 6,500 | — | — | 11,000 Direct | +144.44% | Acquired | (price as of 2026-08-21) |
| June 4, 2024 | TELA | A | 6,200 | — | — | 6,200 Direct | — | Acquired | (price as of 2026-08-21) |
| June 4, 2024 | TELA | A | 4,250 | — | — | 10,520 Direct | +67.78% | Acquired | (price as of 2026-08-21) |
| May 21, 2024 | MGNX | A | 16,500 | — | — | 16,500 Direct | — | Acquired | (price as of 2026-08-21) |
| May 21, 2024 | MGNX | A | 6,500 | — | — | 6,500 Direct | — | Acquired | (price as of 2026-08-21) |
| May 20, 2024 | MGNX | M | 4,500 | — | — | 0 Direct | -100.00% | Disposed | (price as of 2026-08-21) |
| May 20, 2024 | MGNX | M | 4,500 | — | — | 4,500 Direct | — | Acquired | (price as of 2026-08-21) |
| June 1, 2023 | TELA | A | 5,360 | — | — | 5,360 Direct | — | Acquired | (price as of 2026-08-21) |
| June 1, 2023 | TELA | A | 3,135 | — | — | 6,270 Direct | +100.00% | Acquired | (price as of 2026-08-21) |
| May 31, 2023 | MGNX | A | 4,500 | — | — | 4,500 Direct | — | Acquired | (price as of 2026-08-21) |
| May 31, 2023 | MGNX | A | 19,000 | — | — | 19,000 Direct | — | Acquired | (price as of 2026-08-21) |
| June 1, 2022 | TELA | A | 5,360 | — | — | 5,360 Direct | — | Acquired | (price as of 2026-08-21) |
| June 1, 2022 | TELA | A | 3,135 | — | — | 3,135 Direct | — | Acquired | (price as of 2026-08-21) |
| May 19, 2022 | MGNX | A | 24,080 | — | — | 24,080 Direct | — | Acquired | (price as of 2026-08-21) |
| May 19, 2022 | MGNX | A | 18,000 | — | — | 18,000 Direct | — | Acquired | (price as of 2026-08-21) |
| June 2, 2021 | TELA | A | 10,825 | — | — | 10,825 Direct | — | Acquired | (price as of 2026-08-21) |
| May 13, 2021 | MGNX | A | 15,000 | — | — | 15,000 Direct | — | Acquired | (price as of 2026-08-21) |
| Feb. 10, 2021 | MGNX | A | 30,000 | — | — | 30,000 Direct | — | Acquired | (price as of 2026-08-21) |
| June 4, 2020 | TELA | A | 8,806 | — | — | 8,806 Direct | — | Acquired | (price as of 2026-08-21) |
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 19, 2026 | MGNX | Restricted Stock Unit | Common Stock (3,750) | — | — | 3,750 | Acquired |
| May 19, 2026 | MGNX | Stock Option (right to buy) | Common Stock (22,000) | $4.52 | May 19, 2036 | 22,000 | Acquired |
| May 18, 2026 | MGNX | Restricted Stock Unit | Common Stock (3,750) | — | — | 3,750 | Disposed |
| May 28, 2025 | TELA | Stock Option (Right to Buy) | Common Stock (11,700) | $1.39 | May 28, 2035 | 11,700 | Acquired |
| May 21, 2025 | MGNX | Stock Option (right to buy) | Common Stock | $1.49 | May 21, 2035 | 64,961 | Acquired |
| May 21, 2025 | MGNX | Stock Option (right to buy) | Common Stock (22,000) | $1.49 | May 21, 2035 | 22,000 | Acquired |
| May 21, 2025 | MGNX | Restricted Stock Unit | Common Stock (3,750) | — | — | 3,750 | Acquired |
| May 20, 2025 | MGNX | Restricted Stock Unit | Common Stock (6,500) | — | — | 6,500 | Disposed |
| June 4, 2024 | TELA | Stock Option (Right to Buy) | Common Stock (6,200) | $5.71 | June 4, 2034 | 6,200 | Acquired |
| May 21, 2024 | MGNX | Stock Option (right to buy) | Common Stock (16,500) | $4.26 | May 21, 2034 | 16,500 | Acquired |
| May 21, 2024 | MGNX | Restricted Stock Unit | Common Stock (6,500) | — | — | 6,500 | Acquired |
| May 20, 2024 | MGNX | Restricted Stock Unit | Common Stock (4,500) | — | — | 4,500 | Disposed |
| June 1, 2023 | TELA | Stock Option (Right to Buy) | Common Stock (5,360) | $10.34 | June 1, 2033 | 5,360 | Acquired |
| May 31, 2023 | MGNX | Restricted Stock Unit | Common Stock (4,500) | — | — | 4,500 | Acquired |
| May 31, 2023 | MGNX | Stock Option (right to buy) | Common Stock (19,000) | $4.67 | May 31, 2033 | 19,000 | Acquired |
| June 1, 2022 | TELA | Stock Option (Right to Buy) | Common Stock (5,360) | $6.84 | June 1, 2032 | 5,360 | Acquired |
| May 19, 2022 | MGNX | Stock Option (right to buy) | Common Stock | $3.90 | May 19, 2032 | 24,080 | Acquired |
| May 19, 2022 | MGNX | Stock Option (right to buy) | Common Stock (18,000) | $3.90 | May 19, 2032 | 18,000 | Acquired |
| June 2, 2021 | TELA | Stock Option (Right to Buy) | Common Stock (10,825) | $13.16 | June 2, 2031 | 10,825 | Acquired |
| May 13, 2021 | MGNX | Stock Option (right to buy) | Common Stock (15,000) | $28.88 | May 13, 2031 | 15,000 | Acquired |
| Feb. 10, 2021 | MGNX | Stock Option (right to buy) | Common Stock (30,000) | $21.50 | Feb. 10, 2031 | 30,000 | Acquired |
| June 4, 2020 | TELA | Stock Option (Right to Buy) | Common Stock (8,806) | $17.00 | June 4, 2030 | 8,806 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 1 holding
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Nov. 7, 2019 | TELA | Stock Option (right to buy)→ Common Stock (8,000) | 8,000 | Direct |