Insider Cluster (2 insiders) ·Filed Sep 29, 2026
Insider cluster: 2 insiders, $637K total
Actionable Insight ▼ Bearish
Monitor for upcoming earnings or pipeline updates that may have prompted the sales. If additional insider selling follows, the signal strengthens.
Latest settled — T+5d
DFTX ▼ -7.80% at T+5d
SHORT call ✓ call won +7.80% · α vs SPY +9.72% · entry $38.06 → $35.09
Latest observation: T+17 -4.66% FF3 residual α
T+1d
-1.21%
call +1.21% · α +1.39%
$37.60
settled 26d ago
T+5d
-7.80%
call +7.80% · α +9.72%
$35.09
settled 20d ago
T+20d
Pending
in 21h
T+60d
Pending
in 8w
Price Chart
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Executive Summary
Two C-suite insiders at Definium Therapeutics (CFO and CLO) sold a combined $637K in open-market sales at $36.57 per share on September 25, 2026. The total value represents ~0.2% of the company's market cap, a modest but notable cluster of open-market selling by senior officers with no disclosed 10b5-1 plan.
Key Financial Metrics
Direction
selling
Total Value
$637.0K
Insiders
2
Key Facts
- CFO Brandi Roberts sold 3,377 shares at $36.57 for ~$123K on 2026-09-25
- CLO Mark Sullivan sold 14,100 shares at $36.57 for ~$514K on 2026-09-25
- Total open-market sales: $637K, approximately 0.2% of market cap
- No 10b5-1 plan indicated for either sale
- Both sellers are C-suite officers (CFO and CLO)
Financial Impact
$637K in insider open-market sales, ~0.2% of market cap
insider ownershipsentiment
Risk Factors
- Insider sales may be liquidity-driven despite no 10b5-1 plan
- Small absolute dollar amount relative to market cap limits materiality
- Historical bullish calls on DFTX have been wrong, but this is a bearish signal
Investment Themes
Biotech & Drug Discovery
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-DFTX-1790730676541 |
13 reports for DFTX
67% Hit rate @ T+5 Went positive at some point 4 of 6 best @ T+60▲ +13.35%
Filters
Rows
| Type | Now | ||||
|---|---|---|---|---|---|
Sep 29, 2026 26d ago | Insider Cluster | $38.06 $35.09 | ▲ +7.80% | ▲ +9.72% | $36.21 (+4.86%) |
Sep 25, 2026 4w ago | 144 | $38.41 $36.23 | ▼ −5.68% | ▼ −6.88% | $36.21 (−5.73%) |
Sep 25, 2026 4w ago | 144 | $38.41 $36.23 | ▼ −5.68% | ▼ −6.88% | $36.21 (−5.73%) |
Sep 25, 2026 4w ago | 144 | $38.41 $36.23 | ▼ −5.68% | ▼ −6.88% | $36.21 (−5.73%) |
Sep 14, 2026 6w ago | 8-K | $40.25 $39.28 | ▼ −2.41% | ▼ −2.52% | $36.21 (−10.04%) |
Aug 12, 2026 10w ago | 8-K | $42.79 $45.82 | ▲ +7.08% | ▲ +7.53% | $36.21 (−15.38%) |
Aug 9, 2026 11w ago | Institutional Cluster | $45.15 $45.26 | ▲ +0.24% | ▲ +0.29% | $36.21 (−19.80%) |
Jun 25, 2026 17w ago | 144 | $44.95 $44.19 | ▼ −1.69% | ▼ −3.86% | $36.21 (−19.44%) |
Jun 25, 2026 17w ago | 144 | $44.95 $44.19 | ▼ −1.69% | ▼ −3.86% | $36.21 (−19.44%) |
Jun 24, 2026 17w ago | 8-K | $44.79 $43.40 | ▲ +3.10% | ▲ +4.66% | $36.21 (+19.16%) |
Showing 10 of 13
US Market Status
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