CEO open-market selling without a disclosed 10b5-1 plan is a bearish signal, especially given the historical performance showing FDMT's stock has been volatile with mixed insider timing. Monitor for any upcoming clinical data readouts or financing announcements that could explain the sales.
Price Chart
Executive Summary
Two insiders at 4D Molecular Therapeutics sold a total of $833K in shares over a week, led by CEO David Kirn with $811K in open-market sales. The sales represent approximately 0.26% of the company's market cap, a modest but notable insider reduction that warrants attention given the CEO's participation.
Key Financial Metrics
Key Facts
- CEO David Kirn sold 58,300 shares for $811K on 2026-09-14
- Chief Legal Officer Scott Bizily sold 1,600 shares for $22K on 2026-09-16
- Total insider sales: $833K over 7-day window
- No 10b5-1 plan indication for either sale
- Sales represent ~0.26% of market cap ($326M)
Financial Impact
$833K in insider sales, approximately 0.26% of market cap
Risk Factors
- CEO selling may signal lack of confidence in near-term prospects
- Clinical-stage biotech with no approved products — high binary risk
- Stock has shown significant volatility in past 6 months
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-FDMT-1790117051788 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Sep 22, 2026 4w ago | Insider Cluster | $15.00 $14.71 | ▲ +1.93% | ▲ +1.85% | $11.03 (+26.47%) |
Aug 21, 2026 9w ago | Insider Cluster | $15.39 $15.72 | ▲ +2.14% | ▲ +1.82% | $11.03 (−28.33%) |
Jul 20, 2026 14w ago | 8-K | $11.09 $11.38 | ▲ +2.57% | ▲ +1.74% | $11.03 (−0.54%) |
Jul 18, 2026 14w ago | Press Release | $11.09 $11.38 | ▲ +2.57% | ▲ +1.74% | $11.03 (−0.54%) |
Jul 5, 2026 16w ago | Institutional Cluster | $12.72 $12.82 | ▲ +0.79% | ▲ +1.26% | $11.03 (−13.29%) |
Jun 29, 2026 17w ago | 8-K | $12.88 $13.30 | ▲ +3.26% | ▲ +2.48% | $11.03 (−14.36%) |
May 14, 2026 23w ago | EFFECT | $9.81 $9.15 | ▼ −6.73% | ▼ −5.50% | $11.03 (+12.44%) |
May 7, 2026 24w ago | S-3 | $10.14 $10.79 | ▲ +6.41% | ▲ +6.18% | $11.03 (+8.78%) |
Mar 18, 2026 31w ago | Press Release | $8.98 $8.61 | ▼ −4.12% | ▼ −2.38% | $11.03 (+22.83%) |
US Market Status
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