Updated Jul 16, 2026 · Last SEC filing 2026-07-13
PTC THERAPEUTICS, INC. (PTCT) has filed 14 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-07-13. 6 Form 8-K material event filings were reported by PTCT in the last 90 days. 18 Form 144 notices of proposed sale were filed for PTCT stock. InsiderAlpha tracks every PTCT SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SIC classification | Pharmaceutical Preparations (SIC 2834) |
|---|---|
| SEC CIK | 0001070081 |
| Form 4 filings (90d) | 14 |
|---|---|
| Form 8-K filings (90d) | 6 |
| Form 144 notices (90d) | 18 |
| Latest Form 4 filing | 2026-07-13 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Smith Mary L. | Insider | M — Option exercise [10b5-1] | 5.8K | $42.95 | $251K | SEC | |
| Smith Mary L. | Insider | S — Open-market sale [10b5-1] | 5.8K | $90.00 | $525K | SEC | |
| Smith Mary L. | Insider | S — Open-market sale [10b5-1] | 10.0K | $90.00 | $900K | SEC | |
| Smith Mary L. | Insider | M — Option exercise [10b5-1] | 10.0K | $42.95 | $430K | SEC | |
| Almstead Neil Gregory | CHIEF TECHNICAL OPS OFFICER | S — Open-market sale [10b5-1] | 2.5K | $90.25 | $222K | SEC | |
| Almstead Neil Gregory | CHIEF TECHNICAL OPS OFFICER | M — Option exercise [10b5-1] | 2.5K | $46.54 | $115K | SEC | |
| Almstead Neil Gregory | CHIEF TECHNICAL OPS OFFICER | S — Open-market sale | 9.3K | $89.44 | $831K | SEC | |
| Almstead Neil Gregory | CHIEF TECHNICAL OPS OFFICER | S — Open-market sale | 4.0K | $87.17 | $345K | SEC | |
| Almstead Neil Gregory | CHIEF TECHNICAL OPS OFFICER | M — Option exercise | 24.6K | $39.42 | $970K | SEC | |
| Almstead Neil Gregory | CHIEF TECHNICAL OPS OFFICER | S — Open-market sale | 11.4K | $89.03 | $1.01M | SEC | |
| Almstead Neil Gregory | CHIEF TECHNICAL OPS OFFICER | S — Open-market sale | 385 | $86.34 | $33K | SEC | |
| Boulding Mark Elliott | EXEC. VP AND CLO | M — Option exercise | 2.8K | $46.54 | $131K | SEC | |
| Boulding Mark Elliott | EXEC. VP AND CLO | S — Open-market sale | 645 | $85.84 | $55K | SEC | |
| Boulding Mark Elliott | EXEC. VP AND CLO | S — Open-market sale | 1.0K | $84.41 | $87K | SEC | |
| Boulding Mark Elliott | EXEC. VP AND CLO | S — Open-market sale | 387 | $83.10 | $32K | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for PTC THERAPEUTICS, INC. (PTCT). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Almstead Neil Gregory | 46 | $13.04M |
| Boulding Mark Elliott | 32 | $2.68M |
| Klein Matthew B. | 6 | $1.12M |
| Smith Mary L. | 6 | $2.11M |
| Pauwels Eric | 4 | $1.91M |
Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in PTCT insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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