As of September 29, 2026, Ptc Therapeutics's top three insider holders are Michael Schmertzler (Director, 1.30Mn shares), Matthew B. Klein (Chief Executive Officer, 383.87K shares), Stuart Walter Peltz (Chief Executive Officer, 221.87K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Michael Schmertzler | Director | 0 | 1,296,594 | 1,296,594 | 48.7% | 18 Sep, 2026 |
| 2 | Matthew B. Klein | Chief Executive Officer | 383,868 | 0 | 383,868 | 14.4% | 06 Aug, 2026 |
| 3 | Stuart Walter Peltz | Chief Executive Officer | 166,962 | 54,903 | 221,865 | 8.3% | 02 Feb, 2023 |
| 4 | Mark Elliott Boulding | Exec. Vp And Clo | 105,272 | 0 | 105,272 | 4.0% | 19 Aug, 2026 |
| 5 | Pierre Gravier | Chief Financial Officer | 83,986 | 0 | 83,986 | 3.2% | 16 Jul, 2026 |
| 6 | Lee Scott Golden | Evp Chief Medical Officer | 79,115 | 0 | 79,115 | 3.0% | 06 Apr, 2026 |
| 7 | Eric Pauwels | Chief Business Officer | 73,411 | 0 | 73,411 | 2.8% | 12 Jun, 2026 |
| 8 | Christine Marie Utter | Svp, Chief Accounting Officer | 70,199 | 0 | 70,199 | 2.6% | 22 Jun, 2026 |
| 9 | Neil Gregory Almstead | Chief Technical Ops Officer | 60,299 | 0 | 60,299 | 2.3% | 13 Jul, 2026 |
| 10 | Hege Elisabeth Sollie-Zetlmayer | Director | 52,526 | 0 | 52,526 | 2.0% | 30 Jul, 2026 |
| 11 | Emily Luisa Hill | Chief Financial Officer | 38,925 | 0 | 38,925 | 1.5% | 29 Mar, 2023 |
| 12 | Dawn Svoronos | Director | 29,017 | 0 | 29,017 | 1.1% | 10 Jun, 2022 |
| 13 | Glenn Jr Md Phd Steele | Director | 22,500 | 0 | 22,500 | 0.8% | 06 Jan, 2026 |
| 14 | Jerome B Zeldis | Director | 22,500 | 0 | 22,500 | 0.8% | 06 Jan, 2026 |
| 15 | Mary L. Smith | Director | 21,813 | 0 | 21,813 | 0.8% | 13 Jul, 2026 |
| 16 | Allan Steven Jacobson | Director | 21,451 | 0 | 21,451 | 0.8% | 06 Jan, 2026 |
| 17 | Alethia Young | Director | 21,067 | 0 | 21,067 | 0.8% | 06 Jan, 2026 |
| 18 | David P Southwell | Director | 20,850 | 0 | 20,850 | 0.8% | 06 Jan, 2026 |
| 19 | Emma Reeve | Director | 10,666 | 0 | 10,666 | 0.4% | 06 Jan, 2026 |
| 20 | William F. Jr. Bell | Director | 10,333 | 0 | 10,333 | 0.4% | 16 Feb, 2024 |
| 21 | Stephanie Okey | Director | 8,000 | 0 | 8,000 | 0.3% | 12 Mar, 2026 |
| 22 | Jessica Caroline Chutter | Director | 7,333 | 0 | 7,333 | 0.3% | 26 Mar, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 16 Sep, 2026 | Michael Schmertzler | Director | Disposed S | 2,994 | $66.58 | $199.34K | 1,313,600 | Indirect |
| 16 Sep, 2026 | Michael Schmertzler | Director | Disposed S | 7,006 | $67.35 | $471.85K | 1,306,594 | Indirect |
| 17 Sep, 2026 | Michael Schmertzler | Director | Disposed S | 9,624 | $67.83 | $652.80K | 1,296,970 | Indirect |
| 17 Sep, 2026 | Michael Schmertzler | Director | Disposed S | 376 | $68.45 | $25.74K | 1,296,594 | Indirect |
| 09 Sep, 2026 | Michael Schmertzler | Director | Disposed S | 9,428 | $67.79 | $639.12K | 1,327,166 | Indirect |
| 09 Sep, 2026 | Michael Schmertzler | Director | Disposed S | 572 | $68.67 | $39.28K | 1,326,594 | Indirect |
| 10 Sep, 2026 | Michael Schmertzler | Director | Disposed S | 10,000 | $67.34 | $673.40K | 1,316,594 | Indirect |
| 26 Aug, 2026 | Michael Schmertzler | Director | Disposed S | 6,874 | $72.74 | $500.01K | 1,354,720 | Indirect |
| 26 Aug, 2026 | Michael Schmertzler | Director | Disposed S | 5,626 | $73.18 | $411.71K | 1,349,094 | Indirect |
| 27 Aug, 2026 | Michael Schmertzler | Director | Disposed S | 11,890 | $71.55 | $850.73K | 1,337,204 | Indirect |
| 27 Aug, 2026 | Michael Schmertzler | Director | Disposed S | 610 | $72.22 | $44.05K | 1,336,594 | Indirect |
| 19 Aug, 2026 | Michael Schmertzler | Director | Disposed S | 5,335 | $72.86 | $388.71K | 1,381,259 | Indirect |
| 19 Aug, 2026 | Michael Schmertzler | Director | Disposed S | 7,165 | $73.67 | $527.85K | 1,374,094 | Indirect |
| 20 Aug, 2026 | Michael Schmertzler | Director | Disposed S | 9,419 | $70.78 | $666.68K | 1,364,675 | Indirect |
| 20 Aug, 2026 | Michael Schmertzler | Director | Disposed S | 2,390 | $71.88 | $171.79K | 1,362,285 | Indirect |
| 20 Aug, 2026 | Michael Schmertzler | Director | Disposed S | 691 | $72.92 | $50.39K | 1,361,594 | Indirect |
| 17 Aug, 2026 | Mark Elliott Boulding | Exec. Vp And Clo | Acquired M | 2,813 | $25.69 | $72.27K | 108,085 | Direct |
| 17 Aug, 2026 | Mark Elliott Boulding | Exec. Vp And Clo | Disposed S | 1,844 | $72.39 | $133.49K | 106,241 | Direct |
| 17 Aug, 2026 | Mark Elliott Boulding | Exec. Vp And Clo | Disposed S | 969 | $72.90 | $70.64K | 105,272 | Direct |
| 17 Aug, 2026 | Mark Elliott Boulding | Exec. Vp And Clo | Disposed M | 2,813 | $0.00 | $0 | 16,876 | Direct |