This is a routine insider intent-to-sell filing following a vesting event. The dollar amount is immaterial relative to market cap. Monitor for actual sale execution on Form 4; no immediate trading signal.
Price Chart
Executive Summary
Mark Sullivan, an officer of Definium Therapeutics, filed a Form 144 notice of intent to sell 13,008 shares of common stock, with an estimated aggregate market value of approximately $548,027. The shares were acquired through restricted stock vesting under a registered plan on June 25, 2026. This filing signals the insider's intent to sell, though the sale may not be executed.
Key Facts
- Mark Sullivan, an officer, filed Form 144 to sell 13,008 shares of DFTX common stock.
- Estimated aggregate market value of the proposed sale is approximately $548,027.
- Shares were acquired via restricted stock vesting under a registered plan on June 25, 2026.
- The filing date is June 25, 2026; the proposed sale is intended to occur on or after that date.
- The sale is for the account of the reporting person (Mark Sullivan) and is not a gift or other transfer.
Financial Impact
Proposed sale of ~$548,027 worth of DFTX common stock, representing a small fraction of the company's $4.6B market cap.
Risk Factors
- Insider sale may signal reduced conviction if executed in large size relative to holdings.
- Form 144 is only an intent to sell; the sale may not occur.
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 3 SEC documents filed with EDGAR.
| Document | Accession Number |
|---|---|
| 144 Filing (Primary) | 0001950047-26-006493 |
| Document: 0001950047-26-006493-index.html | 0001950047-26-006493 |
| Document: 0001950047-26-006493.txt | 0001950047-26-006493 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Sep 14, 2026 18d ago | 8-K | $40.25 $39.28 | ▼ −2.41% | ▼ −2.52% | $37.40 (−7.08%) |
Aug 12, 2026 7w ago | 8-K | $42.79 $45.82 | ▲ +7.08% | ▲ +7.53% | $37.40 (−12.60%) |
Aug 9, 2026 7w ago | Institutional Cluster | $45.15 $45.26 | ▲ +0.24% | ▲ +0.29% | $37.40 (−17.17%) |
Jun 25, 2026 14w ago | 144 | $44.95 $44.19 | ▼ −1.69% | ▼ −3.86% | $37.40 (−16.80%) |
Jun 25, 2026 14w ago | 144 | $44.95 $44.19 | ▼ −1.69% | ▼ −3.86% | $37.40 (−16.80%) |
Jun 24, 2026 14w ago | 8-K | $44.79 $43.40 | ▲ +3.10% | ▲ +4.66% | $37.40 (+16.50%) |
Jun 24, 2026 14w ago | 424B5 | $44.79 $43.40 | ▲ +3.10% | ▲ +4.66% | $37.40 (+16.50%) |
Jun 22, 2026 14w ago | 424B5 | $36.18 $46.55 | ▼ −28.66% | ▼ −27.65% | $37.40 (−3.37%) |
Apr 27, 2026 22w ago | DEFA14A | $21.27 $21.75 | ▲ +2.26% | ▲ +0.56% | $37.40 (+75.83%) |
US Market Status
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