| Investor | Value | Of portfolio | Shares | Change | Quarter |
|---|---|---|---|---|---|
| Renaissance Technologies | $59.0M | 0.08% | 723.50K | +36% | Q2 2026 |
From each investor's quarterly 13F filing with the SEC: positions at the quarter's end, reported up to 45 days later. All investors
No member of Congress has disclosed a PTCT trade since 2025.
From House and Senate STOCK Act reports. Members disclose trades, not holdings, as value ranges up to 45 days later, so amounts are estimates and “last move” is a hint at who still holds it, not a position. All recent congress trades
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | -0.6 | -9.7 | -0.1 | -4.5 | 13.5 | 10.5 | -16.6 | 2.2 | -6.8 | -6.3 | −20.1% | ||
| 2025 | 1.6 | 20.4 | -7.8 | -2.2 | -2.6 | 0.7 | 6.7 | -5.3 | 24.4 | 11.3 | 25.9 | -11.7 | +68.3% |
| 2024 | -5.3 | 8.0 | 3.2 | 10.5 | 13.1 | -15.9 | 10.7 | 4.3 | 5.0 | 7.6 | 9.9 | 2.9 | +63.8% |
| 2023 | 20.2 | -4.8 | 10.9 | 13.8 | -23.9 | -3.1 | -0.8 | -2.1 | -43.3 | -16.3 | 22.8 | 19.7 | −27.8% |
| 2022 | 1.0 | -12.7 | 6.2 | -5.3 | -16.9 | 36.4 | 8.7 | 14.7 | 0.5 | -24.7 | 9.7 | -8.0 | −4.2% |
| 2021 | -5.3 | -1.2 | -17.1 | -13.0 | -4.7 | 7.6 | -9.3 | 13.9 | -14.8 | 1.9 | -2.0 | 7.2 | −34.7% |
| 2020 | 7.2 | 6.5 | -18.7 | 14.1 | -0.4 | 0.1 | -8.7 | 6.7 | -5.4 | 11.6 | 19.9 | -2.5 | +27.1% |
| 2019 | -9.3 | 11.0 | 9.0 | -0.6 | 7.2 | 12.2 | 7.0 | -7.5 | -24.1 | 20.9 | 14.8 | 2.3 | +39.9% |
| 2018 | 57.6 | -2.1 | 5.1 | 2.5 | 22.3 | -0.5 | 12.9 | 9.6 | 12.6 | -18.0 | -7.8 | -3.4 | +105.8% |
| 2017 | 20.1 | 4.0 | -27.8 | 23.5 | 3.1 | 46.3 | 12.5 | 0.6 | -3.6 | -6.3 | -14.9 | 4.6 | +52.9% |
| 2016 | -26.5 | -66.5 | -19.3 | 15.2 | 10.0 | -14.0 | -15.0 | 37.5 | 70.6 | -55.7 | 79.4 | -2.1 | −66.3% |
| 2015 | 6.1 | 29.9 | -14.7 | -3.5 | -1.1 | -17.1 | 6.4 | -25.4 | -30.1 | -6.9 | 20.8 | 7.9 | −37.4% |
| 2014 | 53.6 | 20.3 | -16.6 | -25.2 | 21.3 | 10.2 | 1.1 | 19.8 | 39.0 | -7.1 | 9.5 | 15.7 | +205.1% |
| 2013 | 4.4 | 14.6 | 19.6 | -15.9 | -13.1 | 8.3 | +13.1% |
| Date | Insider | Transaction | Shares | Value |
|---|---|---|---|---|
| Oct 5, 2026 | Boulding Mark ElliottOfficer | Sale at price 64.03 - 64.16 per share. | 2.1K | $132.79K |
| Oct 5, 2026 | Boulding Mark ElliottOfficer | Conversion of Exercise of derivative security at price 39.42 per share. | 2.1K | $81.72K |
| Sep 9, 2026 | Schmertzler MichaelDirector | Sale at price 67.34 - 68.67 per share. | 20K | $1.35M |
| Aug 26, 2026 | Schmertzler MichaelDirector | Sale at price 71.55 - 73.18 per share. | 25K | $1.81M |
| Aug 19, 2026 | Schmertzler MichaelDirector | Sale at price 70.78 - 73.67 per share. | 25K | $1.81M |
| Aug 16, 2026 | Boulding Mark ElliottOfficer | Sale at price 72.39 - 72.90 per share. | 2.8K | $204.13K |
| Aug 16, 2026 | Boulding Mark ElliottOfficer | Conversion of Exercise of derivative security at price 25.69 per share. | 2.8K | $72.27K |
| Aug 3, 2026 | Klein Matthew BChief Executive Officer | Sale at price 68.57 per share. | 10.3K | $705.72K |
| Jul 13, 2026 | Gravier PierreChief Financial Officer | Sale at price 80.35 per share. | 3.5K | $280.74K |
| Jul 8, 2026 | Almstead Neil GregoryChief Technology Officer | Sale at price 90.25 per share. | 2.5K | $222.38K |
| Jul 8, 2026 | Almstead Neil GregoryChief Technology Officer | Conversion of Exercise of derivative security at price 46.54 per share. | 2.5K | $114.67K |
| Jul 8, 2026 | Smith Mary LDirector | Sale at price 90.00 per share. | 15.8K | $1.43M |
| Jul 8, 2026 | Smith Mary LDirector | Conversion of Exercise of derivative security at price 42.95 per share. | 15.8K | $680.07K |
| Jul 6, 2026 | Almstead Neil GregoryChief Technology Officer | Sale at price 85.28 - 89.44 per share. | 46.8K | $4.09M |
| Jul 6, 2026 | Almstead Neil GregoryChief Technology Officer | Conversion of Exercise of derivative security at price 38.10 - 39.42 per share. | 46.8K | $1.82M |
| Jul 5, 2026 | Boulding Mark ElliottOfficer | Sale at price 83.10 - 86.38 per share. | 5.1K | $432.12K |
| Jul 5, 2026 | Boulding Mark ElliottOfficer | Conversion of Exercise of derivative security at price 39.42 - 46.54 per share. | 5.1K | $220.24K |
| Jun 25, 2026 | Almstead Neil GregoryChief Technology Officer | Sale at price 85.23 - 85.26 per share. | 8.1K | $693.15K |
| Jun 25, 2026 | Almstead Neil GregoryChief Technology Officer | Conversion of Exercise of derivative security at price 38.10 per share. | 8.1K | $309.75K |
| Jun 24, 2026 | Almstead Neil GregoryOfficer | Sale at price 85.01 - 87.00 per share. | 26.3K | $2.25M |
PTC Therapeutics, Inc., a biopharmaceutical company, focuses on the discovery, development, and commercialization of medicines to children and adults living with rare disorders in the United States and internationally. The company provides Translarna and Emflaza for the treatment of Duchenne muscular dystrophy; Upstaza to treat aromatic l-amino acid decarboxylas (AADC) deficiency, a central nervous system disorder; Tegsedi and Waylivra for the treatment of rare diseases; and Evrysdi to treat spinal muscular atrophy (SMA) in adults and children. Its development pipeline products include Sepiapterin for the treatment of phenylketonuria; PTC518 splicing platform, which is being developed for the treatment of Huntington's disease; and inflammation and ferroptosis platforms, including vatiquinone to treat Friedreich's ataxia. The company distributes its products through third-party distributors. It has collaborations with F. Hoffman-La Roche Ltd., Hoffman-La Roche Inc., the SMA Foundation, National Taiwan University, Akcea Therapeutics, Inc., and Shiratori Pharmaceutical Co., Ltd. The company has license and collaboration agreement with Novartis Pharmaceuticals Corporation to develop PTC518 Huntington's disease program. It markets Upstaza, a gene therapy with the brand name Kebilidi in the United States. PTC Therapeutics, Inc. was incorporated in 1998 and is headquartered in Warren, New Jersey.
Buy / hold / sell counts