4D Molecular Therapeutics, Inc (FDMT) insider trading
Every open-market stock purchase and sale by 4D Molecular Therapeutics, Inc executives, directors, large shareholders and members of Congress, from SEC Form 4 filings. Sector: Other.
Insider activity at a glance
- David Kirn (Insider) and 1 other sold $3.1M in the last 90 days.
- Last insider buy: Viking Global Investors LP (Insider), $13.6M, 3 years ago.
Last 12 months: insiders bought $0 (0 buys) and sold $5.4M (19 sales). Last close $12.62 on Oct 21, 2026.
Recent FDMT insider trades
| Date | Insider | Trade | Value |
|---|---|---|---|
| Oct 16, 2026 | Scott Bizily (C-suite exec) | Sold | $21K |
| Oct 16, 2026 | Scott Bizily (C-suite exec) | Bought (not open market) | $6.8K |
| Oct 16, 2026 | Scott Bizily (C-suite exec) | Bought (not open market) | — |
| Oct 5, 2026 | David Kirn (Insider) | Sold | $750K |
| Oct 5, 2026 | David Kirn (Insider) | Sold | $3.7K |
| Sep 16, 2026 | Scott Bizily (C-suite exec) | Sold | $22.3K |
| Sep 16, 2026 | Scott Bizily (C-suite exec) | Bought (not open market) | $6.8K |
| Sep 16, 2026 | Scott Bizily (C-suite exec) | Bought (not open market) | — |
| Sep 14, 2026 | David Kirn (Insider) | Sold | $811K |
| Sep 1, 2026 | Scott Bizily (C-suite exec) | Sold | $8.2K |
| Sep 1, 2026 | Scott Bizily (C-suite exec) | Bought (not open market) | $3.8K |
| Sep 1, 2026 | Scott Bizily (C-suite exec) | Bought (not open market) | — |
| Aug 19, 2026 | David Kirn (Insider) | Sold | $663K |
| Aug 19, 2026 | David Kirn (Insider) | Sold | $426K |
| Aug 19, 2026 | David Kirn (Insider) | Bought (not open market) | $207K |
| Aug 19, 2026 | David Kirn (Insider) | Bought (not open market) | — |
| Aug 17, 2026 | Scott Bizily (C-suite exec) | Sold | $19.9K |
| Aug 17, 2026 | Scott Bizily (C-suite exec) | Bought (not open market) | $6.8K |
| Aug 17, 2026 | Scott Bizily (C-suite exec) | Bought (not open market) | — |
| Aug 13, 2026 | Scott Bizily (C-suite exec) | Sold | $19.6K |
| Aug 13, 2026 | Scott Bizily (C-suite exec) | Bought (not open market) | $6.8K |
| Aug 13, 2026 | Scott Bizily (C-suite exec) | Bought (not open market) | — |
| Aug 4, 2026 | David Kirn (Insider) | Sold | $275K |
| Aug 3, 2026 | David Kirn (Insider) | Sold | $125K |
| Jul 10, 2026 | David Kirn (Insider) | Sold | $184K |
Who's trading FDMT
- Scott Bizily, C-suite exec: sold $368K (10 sales), last Oct 16, 2026
- David Kirn, CEO: sold $5M (12 sales), last Oct 5, 2026
- Susannah Gray, Insider: other filings, last Jun 17, 2026
- Charles Theuer, Insider: other filings, last Jun 17, 2026
- Jacob Chacko, Insider: other filings, last Jun 17, 2026
- John F Milligan, Insider: other filings, last Jun 17, 2026
- Nancy Miller-Rich, Insider: other filings, last Jun 17, 2026
- Glenn Sblendorio, Insider: other filings, last Jun 17, 2026
- Shawn Tomasello, Insider: other filings, last Jun 17, 2026
- Christopher Paul Simms, Insider: other filings, last Mar 25, 2026
- Ashoo Gupta, VP: sold $6.7K (4 sales), last Mar 20, 2026
- Kristian Humer, CFO: other filings, last Dec 9, 2025
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