PTC Therapeutics, Inc. short interest in 2025
In 2025, PTC Therapeutics, Inc.'s disclosed short interest ran from 5.50% of shares outstanding on 15 Jan 2025 to 13.34% on 31 Dec 2025, a change of +7.84 percentage points. The year's high was 16.02% on 28 Nov 2025 and its low 4.79% on 14 Feb 2025, averaging 8.27% across 24 twice-monthly settlement dates. FINRA's days-to-cover figure peaked at 10.03 days on 31 Dec 2025. Full history: PTC Therapeutics, Inc..
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By year: 2018 · 2019 · 2020 · 2021 · 2022 · 2023 · 2024 · 2025 · 2026
2025 in figures
- Start of year
- 5.50% (15 Jan 2025)
- End of year
- 13.34% (31 Dec 2025)
- Change
- +7.84 pp
- High
- 16.02% (28 Nov 2025)
- Low
- 4.79% (14 Feb 2025)
- Average
- 8.27%
- Highest days to cover
- 10.03 (31 Dec 2025)
- SEC filings marked
- 9
Every report in 2025
| Settlement | Short interest | Days to cover | Filings since previous |
|---|---|---|---|
| 15 Jan 2025 | 5.50% | 7.28 | results (8-K) |
| 31 Jan 2025 | 5.40% | 6.58 | |
| 14 Feb 2025 | 4.79% | 4.31 | |
| 28 Feb 2025 | 4.91% | 5.03 | 10-K filed, results (8-K) |
| 14 Mar 2025 | 5.58% | 4.69 | |
| 31 Mar 2025 | 7.03% | 6.43 | |
| 15 Apr 2025 | 7.10% | 3.77 | |
| 30 Apr 2025 | 6.49% | 5.79 | |
| 15 May 2025 | 6.52% | 2.40 | 10-Q filed, results (8-K) |
| 30 May 2025 | 6.00% | 5.30 | |
| 13 Jun 2025 | 6.40% | 5.29 | |
| 30 Jun 2025 | 7.57% | 4.70 | |
| 15 Jul 2025 | 7.28% | 5.52 | |
| 31 Jul 2025 | 7.59% | 5.04 | |
| 15 Aug 2025 | 8.18% | 5.06 | 10-Q filed, results (8-K) |
| 29 Aug 2025 | 8.36% | 5.62 | |
| 15 Sep 2025 | 9.18% | 4.82 | |
| 30 Sep 2025 | 8.98% | 5.81 | |
| 15 Oct 2025 | 9.84% | 6.39 | |
| 31 Oct 2025 | 10.50% | 9.96 | |
| 14 Nov 2025 | 11.73% | 6.34 | 10-Q filed, results (8-K) |
| 28 Nov 2025 | 16.02% | 4.10 | |
| 15 Dec 2025 | 14.25% | 7.54 | |
| 31 Dec 2025 | 13.34% | 10.03 |
See also: PTC Therapeutics, Inc.'s full history · most shorted US stocks of 2025 · today's US league.
About this data
US short interest data: FINRA (finra.org), shown as reported shares short divided by SEC-reported shares outstanding for each settlement date. FINRA® is a registered trademark of the Financial Industry Regulatory Authority, Inc. This site is not affiliated with or endorsed by FINRA or the SEC; displayed for personal reference, bulk redistribution is not permitted (see terms). Nothing here is investment advice. Method: methodology.