SEC Form 4 · accession 0001288952-26-000004
PTC THERAPEUTICS, INC. · PTCT
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Michael Schmertzler
Director
Period of report
Aug 19, 2026
Accepted (ET)
Aug 21, 2026 · 5:20 pm EDT
Rule 10b5-1 plan
yes — trade under a plan
Issuer CIK
0001070081
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common StockF2,F3 | Aug 19, 2026 | S | 5,335 | $72.86 | D | 1,381,259 | I | See footnote |
| Common StockF4,F3 | Aug 19, 2026 | S | 7,165 | $73.67 | D | 1,374,094 | I | See footnote |
| Common StockF5,F3 | Aug 20, 2026 | S | 9,419 | $70.78 | D | 1,364,675 | I | See footnote |
| Common StockF6,F3 | Aug 20, 2026 | S | 2,390 | $71.88 | D | 1,362,285 | I | See footnote |
| Common StockF7,F3 | Aug 20, 2026 | S | 691 | $72.92 | D | 1,361,594 | I | See footnote |
| Common Stock | holding | — | — | — | 163,266 | D |
Table II — derivative securities
No Table II lines on this filing.
Explanation of responses
- F1This transaction was effected pursuant to a written Rule 10b5-1 plan adopted by Section Six Partners, L.P., of which the Reporting Person is a general partner and limited partner, on May 14, 2026
- F2This price represents the weighted average price of sale transactions that were executed in multiple trades at prices ranging from $72.33 to $73.32 per share. The Reporting Person hereby undertakes, upon request by the SEC staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
- F3Represents shares of common stock held by Section Six Partners, L.P. The Reporting Person is a general and limited partner of Section Six Partners, L.P. The Reporting Person disclaims beneficial ownership of the shares of common stock held by Section Six Partners, L.P. except to the extent of his pecuniary interest therein.
- F4This price represents the weighted average price of sale transactions that were executed in multiple trades at prices ranging from $73.33 to $74.02 per share. The Reporting Person hereby undertakes, upon request by the SEC staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
- F5This price represents the weighted average price of sale transactions that were executed in multiple trades at prices ranging from $70.50 to $71.49 per share. The Reporting Person hereby undertakes, upon request by the SEC staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
- F6This price represents the weighted average price of sale transactions that were executed in multiple trades at prices ranging from $71.50 to $72.46 per share. The Reporting Person hereby undertakes, upon request by the SEC staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
- F7This price represents the weighted average price of sale transactions that were executed in multiple trades at prices ranging from $72.60 to $73.48 per share. The Reporting Person hereby undertakes, upon request by the SEC staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.