The proposed sale is negligible in size and follows insider accumulation, indicating no material change in insider sentiment. Monitor for any subsequent Form 4 filings to confirm execution and for any larger insider transactions that may signal a shift.
Price Chart
Executive Summary
Mark Elliott Boulding, an officer of PTC Therapeutics, filed a Form 144 on October 9, 2026, indicating intent to sell 192 shares of common stock with an estimated aggregate market value of $12,338.84. The proposed sale follows recent option exercises and open-market acquisitions by the same insider, and the small share count relative to the company's market cap suggests a routine, non-material transaction.
Key Facts
- Insider Mark Elliott Boulding (Officer) filed Form 144 to sell 192 shares of common stock.
- Estimated aggregate market value of the proposed sale is $12,338.84.
- The sale is intended to be executed through Fidelity Brokerage Services LLC.
- The filing date is October 9, 2026.
- The proposed sale follows recent insider acquisitions: 2,813 shares on August 17, 2026, 1,638 shares on October 5, 2026, and 435 shares on October 6, 2026.
Financial Impact
Proposed sale of 192 shares valued at approximately $12,339, a de minimis amount relative to the company's market capitalization.
Risk Factors
- Insider selling, even small, can sometimes precede broader insider distribution; however, the accumulation pattern here suggests this is likely a routine diversification.
Investment Themes
Documents Analyzed
This report is based on 3 SEC documents filed with EDGAR.
| Document | Accession Number |
|---|---|
| 144 Filing (Primary) | 0001959173-26-007327 |
| Document: 0001959173-26-007327-index.html | 0001959173-26-007327 |
| Document: 0001959173-26-007327.txt | 0001959173-26-007327 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 27, 2026 1d ago | Institutional Cluster | $61.07 | awaiting T+1 | awaiting T+1 | $64.00 (+4.80%) |
Oct 16, 2026 12d ago | Insider Cluster | $61.53 $62.92 | ▲ +2.26% | ▲ +1.92% | $64.00 (+4.01%) |
Oct 9, 2026 19d ago | 144 | $62.92 $59.92 | ▼ −4.77% | ▼ −4.76% | $64.00 (+1.72%) |
Oct 7, 2026 21d ago | 144 | $62.56 $64.70 | ▲ +3.42% | ▲ +2.82% | $64.00 (+2.30%) |
Oct 6, 2026 22d ago | 144 | $63.23 $62.56 | ▼ −1.06% | ▼ −0.64% | $64.00 (+1.22%) |
Sep 21, 2026 5w ago | Press Release | $65.96 $62.34 | ▼ −5.49% | ▼ −4.77% | $64.00 (−2.97%) |
Aug 21, 2026 9w ago | Insider Cluster | $71.06 $73.47 | ▲ +3.39% | ▲ +3.07% | $64.00 (−9.94%) |
Jul 16, 2026 14w ago | Insider Cluster | $78.59 $78.01 | ▼ −0.74% | ▼ −0.58% | $64.00 (−18.56%) |
Jul 16, 2026 15w ago | Press Release | $78.52 | awaiting T+1 | awaiting T+1 | $64.00 (−18.49%) |
Jul 13, 2026 15w ago | Insider Cluster | $78.06 $78.84 | ▲ +1.00% | ▲ +0.60% | $64.00 (−18.01%) |
US Market Status
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