49 transactions on file (0 open-market purchases and 1 open-market sale).
1 open-market sale by MGNX insiders, between Aug 19, 2026 and Aug 19, 2026.
Discretionary. The box was on the form and was not ticked.
Planned (10b5-1). The filer ticked the Form 4's 10b5-1 box.
Not stated. The filing does not say.
| Date | Insider | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|
| 2026-08-19 | Peters Jeffrey Stuart Senior VP, GC, and Secretary Open-market salePlanned (10b5-1) | Open-market sale Planned (10b5-1) | −31,105 | $4.15 | −129.09K | 0 |
| 2026-08-17 | Bonvini Ezio Sr VP, Research & CSO Option exercise | Option exercise | +40,000 | $2.60 | +104K | 185,799 |
| 2026-05-18 | Jackson Scott Thomas Director Option exercise | Option exercise | +3,750 | - | - | 14,750 |
| 2026-05-18 | SIEGEL JAY PHILIP Director Option exercise | Option exercise | +3,750 | - | - | 14,750 |
| 2026-05-18 | Ferrante Karen Jean Director Option exercise | Option exercise | +3,750 | - | - | 14,750 |
44 more transactions are on Measure
| Insider | Role | On Sep 12, 2025 | Now | Change | Sold | Shape |
|---|---|---|---|---|---|---|
| Peters Jeffrey StuartSenior VP, GC, and Secretary | Senior VP, GC, and Secretary | 31,105 | 0 | −100.00% | $129.09K$129.09K on a plan |
What each insider held after every open-market trade, over the last twelve months.
The assistant answers from what MGNX has actually filed: 15 annual reports filed with the SEC, 49 Form 4 filings from the last year and 2 funds that hold it. Every figure in a reply links to the filing it came from, so an answer can be checked rather than believed.
Pressing one answers it here, from MGNX's filings and figures. One a day without an account; a free account has its own, and no card.
See every Form 4 MGNX insiders have filed, not the latest few.
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Source
From SEC Form 4 filings, filed within two business days of a transaction.
Past transactions say nothing about future ones, and none of this is investment advice.
See who bought, not who was handed shares
Every Form 4 MGNX insiders file, not just the latest handful, with vesting and tax withholding struck out so what's left reads as a decision.
Every filingMeasure
Follow the investors who hold it
Each stake priced at the quarter it was filed, and diffed against the quarter before: who added, who trimmed, who left.
Every position they holdMeasure
Ask what a run of filings adds up to
Whether this is one decision or a pattern, and how it compares with MGNX's own history of insider activity.
Free, no card, and it does not expire.