Form 4: Ptc Therapeutics Director Sells Shares
Insider Transaction (Form 4)
Michael Schmertzler, a Director of Ptc Therapeutics, Inc., sold 25,000 shares of common stock on August 26, 2026.
Summary
- Open-market sale: disposed of 6,874 Common Stock at $72.74 ($500,015) on August 26, 2026; holds 1,354,720 after (Indirect).
- Open-market sale: disposed of 5,626 Common Stock at $73.18 ($411,711) on August 26, 2026; holds 1,349,094 after (Indirect).
- Open-market sale: disposed of 11,890 Common Stock at $71.55 ($850,730) on August 27, 2026; holds 1,337,204 after (Indirect).
- Open-market sale: disposed of 610 Common Stock at $72.22 ($44,054) on August 27, 2026; holds 1,336,594 after (Indirect).
Sentiment
Score: 4
Explanation: StockSavvy.ai views this as a mildly negative but low-conviction signal: an insider sold $1,806,509 of stock under a pre-arranged Rule 10b5-1 plan, which is typically routine.
Insider Transactions
Michael Schmertzler — Director
Transaction made under a Rule 10b5-1 trading plan.
| Date | Transaction | Security | Shares | Price | Value | Held After |
|---|---|---|---|---|---|---|
| 2026-08-26 | Open-market sale | Common Stock | 6,874 | $73 | $500.0K | 1,354,720 |
| 2026-08-26 | Open-market sale | Common Stock | 5,626 | $73 | $411.7K | 1,349,094 |
| 2026-08-27 | Open-market sale | Common Stock | 11,890 | $72 | $850.7K | 1,337,204 |
| 2026-08-27 | Open-market sale | Common Stock | 610 | $72 | $44.1K | 1,336,594 |
Key Dates
| Date | Description |
|---|---|
| 2026-08-26 | Open-market sale (6,874 shares) |
| 2026-08-26 | Open-market sale (5,626 shares) |
| 2026-08-27 | Open-market sale (11,890 shares) |
| 2026-08-27 | Open-market sale (610 shares) |
Keywords
insider transaction, Form 4, PTCT, PTC THERAPEUTICS, INC., bearish, Michael Schmertzler
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