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 19, 2026.
Summary
- Open-market sale: disposed of 5,335 Common Stock at $72.86 ($388,708) on August 19, 2026; holds 1,381,259 after (Indirect).
- Open-market sale: disposed of 7,165 Common Stock at $73.67 ($527,846) on August 19, 2026; holds 1,374,094 after (Indirect).
- Open-market sale: disposed of 9,419 Common Stock at $70.78 ($666,677) on August 20, 2026; holds 1,364,675 after (Indirect).
- Open-market sale: disposed of 2,390 Common Stock at $71.88 ($171,793) on August 20, 2026; holds 1,362,285 after (Indirect).
- Open-market sale: disposed of 691 Common Stock at $72.92 ($50,388) on August 20, 2026; holds 1,361,594 after (Indirect).
Sentiment
Score: 4
Explanation: StockSavvy.ai views this as a mildly negative but low-conviction signal: an insider sold $1,805,411 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 |
|---|---|---|---|---|---|---|
| 2026-08-19 | Open-market sale | Common Stock | 5,335 | $73 | $388.7K | 1,381,259 |
| 2026-08-19 | Open-market sale | Common Stock | 7,165 | $74 | $527.8K | 1,374,094 |
| 2026-08-20 | Open-market sale | Common Stock | 9,419 | $71 | $666.7K | 1,364,675 |
| 2026-08-20 | Open-market sale | Common Stock | 2,390 | $72 | $171.8K | 1,362,285 |
| 2026-08-20 | Open-market sale | Common Stock | 691 | $73 | $50.4K | 1,361,594 |
Key Dates
| Date | Description |
|---|---|
| 2026-08-19 | Open-market sale (5,335 shares) |
| 2026-08-19 | Open-market sale (7,165 shares) |
| 2026-08-20 | Open-market sale (9,419 shares) |
| 2026-08-20 | Open-market sale (2,390 shares) |
| 2026-08-20 | Open-market sale (691 shares) |
Keywords
insider transaction, Form 4, PTCT, PTC THERAPEUTICS, INC., bearish, Michael Schmertzler
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