As of the latest Form 4 filed May 20, 2026.
What MacroGenics Inc insiders — officers, directors and 10% owners — have bought and sold in their own stock, straight from their SEC Form 4 filings. Values are shares × the reported transaction price where both are disclosed.
Newest filing first — the 34 most recent filings for MGNX.
| Filed | Trade date | Insider | Transaction | Shares | Price | Value | 10b5-1 | Filing |
|---|---|---|---|---|---|---|---|---|
| 2026-05-20 | 2026-05-18 | SIEGEL JAY PHILIP Director | MExercise | +3.75K | — | — | No | Form 4 ↗ |
| 2026-05-20 | 2026-05-18 | Ferrante Karen Jean Director | MExercise | +3.75K | — | — | No | Form 4 ↗ |
| 2026-05-20 | 2026-05-18 | Jackson Scott Thomas Director | MExercise | +3.75K | — | — | No | Form 4 ↗ |
| 2026-05-20 | 2026-05-18 | Chhabra Meenu Director | MExercise | +3.75K | — | — | No | Form 4 ↗ |
| 2026-05-20 | 2026-05-18 | Liu Margaret Director | MExercise | +3.75K | — | — | No | Form 4 ↗ |
| 2026-05-20 | 2026-05-18 | HEIDEN WILLIAM K Director | MExercise | +3.75K | — | — | No | Form 4 ↗ |
| 2026-05-20 | 2026-05-18 | HURWITZ EDWARD Director | MExercise | +3.75K | — | — | No | Form 4 ↗ |
| 2026-05-20 | 2026-05-18 | STUMP DAVID C Director | MExercise | +3.75K | — | — | No | Form 4 ↗ |
| 2026-05-20 | 2026-05-18 | O'Brien Federica F. Director | MExercise | +3.75K | — | — | No | Form 4 ↗ |
| 2026-02-10 | 2026-02-08 | Smith Beth Ann VP, Controller & Treasurer | FTax | −612.00 | $1.81 | $1.11K | No | Form 4 ↗ |
| 2026-02-10 | 2026-02-08 | Smith Beth Ann, VP, Controller & Treasurer | MExercise | +1.58K | — | — | No | Form 4 ↗ |
| 2026-02-10 | 2026-02-08 | Peters Jeffrey Stuart Senior VP, GC, and Secretary | FTax | −3.47K | $1.81 | $6.29K | No | Form 4 ↗ |
| 2026-02-10 | 2026-02-08 | Peters Jeffrey Stuart, Senior VP, GC, and Secretary | MExercise | +9.00K | — | — | No | Form 4 ↗ |
| 2026-02-10 | 2026-02-08 | Spitznagel Thomas Sr VP, Technical Ops | FTax | −3.19K | $1.81 | $5.77K | No | Form 4 ↗ |
| 2026-02-10 | 2026-02-08 | Spitznagel Thomas, Sr VP, Technical Ops | MExercise | +9.00K | — | — | No | Form 4 ↗ |
| 2026-02-10 | 2026-02-08 | Bonvini Ezio Sr VP, Research & CSO | FTax | −4.31K | $1.81 | $7.80K | No | Form 4 ↗ |
| 2026-02-10 | 2026-02-08 | Bonvini Ezio, Sr VP, Research & CSO | MExercise | +11.2K | — | — | No | Form 4 ↗ |
| 2026-02-10 | 2026-02-08 | Risser Eric Blasius President and CEO | FTax | −4.31K | $1.81 | $7.80K | No | Form 4 ↗ |
| 2026-02-10 | 2026-02-08 | Risser Eric Blasius, President and CEO | MExercise | +11.2K | — | — | No | Form 4 ↗ |
| 2026-02-10 | 2026-02-08 | Koenig Scott Director | MExercise | +15.8K | — | — | No | Form 4 ↗ |
| 2026-02-10 | 2026-02-08 | Karrels James SVP and CFO | FTax | −3.86K | $1.81 | $6.99K | No | Form 4 ↗ |
| 2026-02-10 | 2026-02-08 | Karrels James, SVP and CFO | MExercise | +10.00K | — | — | No | Form 4 ↗ |
| 2026-02-10 | 2026-02-07 | Smith Beth Ann VP, Controller & Treasurer | FTax | −1.01K | $1.81 | $1.83K | No | Form 4 ↗ |
| 2026-02-10 | 2026-02-07 | Smith Beth Ann, VP, Controller & Treasurer | MExercise | +2.62K | — | — | No | Form 4 ↗ |
| 2026-02-10 | 2026-02-07 | Peters Jeffrey Stuart Senior VP, GC, and Secretary | FTax | −2.32K | $1.81 | $4.19K | No | Form 4 ↗ |
| 2026-02-10 | 2026-02-07 | Peters Jeffrey Stuart, Senior VP, GC, and Secretary | MExercise | +6.00K | — | — | No | Form 4 ↗ |
| 2026-02-10 | 2026-02-07 | Spitznagel Thomas Sr VP, Technical Ops | FTax | −2.48K | $1.81 | $4.50K | No | Form 4 ↗ |
| 2026-02-10 | 2026-02-07 | Spitznagel Thomas, Sr VP, Technical Ops | MExercise | +6.00K | — | — | No | Form 4 ↗ |
| 2026-02-10 | 2026-02-07 | Bonvini Ezio Sr VP, Research & CSO | FTax | −2.70K | $1.81 | $4.89K | No | Form 4 ↗ |
| 2026-02-10 | 2026-02-07 | Bonvini Ezio, Sr VP, Research & CSO | MExercise | +7.00K | — | — | No | Form 4 ↗ |
| 2026-02-10 | 2026-02-07 | Risser Eric Blasius President and CEO | FTax | −2.58K | $1.81 | $4.66K | No | Form 4 ↗ |
| 2026-02-10 | 2026-02-07 | Risser Eric Blasius, President and CEO | MExercise | +6.67K | — | — | No | Form 4 ↗ |
| 2026-02-10 | 2026-02-07 | Karrels James SVP and CFO | FTax | −2.45K | $1.81 | $4.43K | No | Form 4 ↗ |
| 2026-02-10 | 2026-02-07 | Karrels James, SVP and CFO | MExercise | +6.33K | — | — | No | Form 4 ↗ |
Insiders — a company’s officers, directors and holders of more than 10% of its stock — must report any trade in that stock to the SEC on a Form 4 within two business days. Each row here is one transaction from those filings.
The transaction code tells you what happened: Purchase (P) and Sale (S) are open-market trades — the ones markets watch most; Award (A) is a granted stock or unit, Option exercise (M) converts options into shares, and Gift (G) is a transfer for no consideration. Awards, exercises and gifts are largely compensation or administrative, not a directional bet.
One caveat on sales: many are made under a Rule 10b5-1 plan scheduled months in advance, so a sale is not automatically a bearish signal. Insider activity is a noisy input — read it alongside the filings, not on its own.
See also MGNX’s full analysis or the market-wide insider trading feed. The tabs above jump to MGNX’s other SEC data.
Source: SEC Form 4 filings for MGNX, parsed from EDGAR. Transaction prices are as reported in the filing — SEC public-domain data, not market quotes. Values are shares × reported price where both are disclosed; grants and gifts often carry no price. A delayed record of what insiders reported, not a live position or a recommendation.
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