Peters Jeffrey Stuart sold $129K of MGNX
Peters Jeffrey Stuart (Senior VP, GC, and Secretary) sold 31,105 shares of MACROGENICS INC (MGNX) at $4.15 ($0.13M total) on 2026-08-19 under a Rule 10b5-1 trading plan.
How this was made
The 30-second read
Why it matters
A small insider divestiture by a senior officer may cause slight short‑term price weakness but is unlikely to drive major moves.
Market read
Primary disclosure of a modest insider sale; limited trading relevance.
What to watch
The 10b5‑1 plan may have been pre‑scheduled, limiting informational value.
Background
Form 4 filings disclose insider transactions; this is the first public report of the sale.
Ticker impact
Senior VP Jeffrey Stuart sold 31,105 shares for $129,085 via a 10b5‑1 plan, reducing his holding to zero.
Potential modest downside pressure in the next trading session.
Insider sales, especially by a senior officer, often lead to slight sell‑offs, but the amount is small relative to market cap.
Market effects
Minimal impact on biotech sector; typical insider sale activity.
None
None
Counterpoint
The sale could be routine estate planning, not a negative signal.
Key entities
- CompanyMacroGenics Inc.
Biotech firm listed on NASDAQ under ticker MGNX.
- IndividualJeffrey Stuart
Senior Vice President, General Counsel and Secretary of MacroGenics.
