Form 4: Ptc Therapeutics Executive Sells Shares
Insider Transaction (Form 4)
Mark Elliott Boulding, EXEC. VP AND CLO of Ptc Therapeutics, Inc., sold 2,813 shares of common stock on August 17, 2026.
Summary
- Option exercise/conversion: acquired 2,813 Common Stock at $25.69 ($72,266) on August 17, 2026; holds 108,085 after (Direct).
- Open-market sale: disposed of 1,844 Common Stock at $72.39 ($133,487) on August 17, 2026; holds 106,241 after (Direct).
- Open-market sale: disposed of 969 Common Stock at $72.90 ($70,640) on August 17, 2026; holds 105,272 after (Direct).
- Option exercise/conversion: disposed of 2,813 Stock Option (Right to Buy) on August 17, 2026; holds 16,876 after (Direct).
Sentiment
Score: 4
Explanation: StockSavvy.ai views this as a mildly negative but low-conviction signal: an insider sold $204,127 of stock under a pre-arranged Rule 10b5-1 plan, which is typically routine.
Insider Transactions
Mark Elliott Boulding — Officer (EXEC. VP AND CLO)
Transaction made under a Rule 10b5-1 trading plan.
| Date | Transaction | Security | Shares | Price | Value | Held After |
|---|---|---|---|---|---|---|
| 2026-08-17 | Option exercise/conversion | Common Stock | 2,813 | $26 | $72.3K | 108,085 |
| 2026-08-17 | Open-market sale | Common Stock | 1,844 | $72 | $133.5K | 106,241 |
| 2026-08-17 | Open-market sale | Common Stock | 969 | $73 | $70.6K | 105,272 |
| 2026-08-17 | Option exercise/conversion | Stock Option (Right to Buy) | 2,813 | — | — | 16,876 |
Key Dates
| Date | Description |
|---|---|
| 2026-08-17 | Option exercise/conversion (2,813 shares) |
| 2026-08-17 | Open-market sale (1,844 shares) |
| 2026-08-17 | Open-market sale (969 shares) |
| 2026-08-17 | Option exercise/conversion (2,813 shares) |
Keywords
insider transaction, Form 4, PTCT, PTC THERAPEUTICS, INC., bearish, Mark Elliott Boulding
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