PTC THERAPEUTICS INC PTCT
COM · Common Stock · CUSIP 69366J200 · ISIN US69366J2006
Pharmaceutical company
- SectorHealth care
- IndustryPharmaceutical Preparations
- HeadquartersWarren, NJ
- Founded1998
- Websiteptcbio.com
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($10.3m this quarter). Holder counts are more reliable. Shares outstanding: 83.5m as of 2026-07-29, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $81.55. Options: 9 managers hold calls ($72.2m notional), 6 hold puts ($10.6m).
Trends to Q2 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 213 |
| Q4 2022 | 203 |
| Q1 2023 | 203 |
| Q2 2023 | 207 |
| Q3 2023 | 182 |
| Q4 2023 | 174 |
| Q1 2024 | 185 |
| Q2 2024 | 200 |
| Q3 2024 | 204 |
| Q4 2024 | 242 |
| Q1 2025 | 263 |
| Q2 2025 | 286 |
| Q3 2025 | 295 |
| Q4 2025 | 354 |
| Q1 2026 | 353 |
| Q2 2026 | 383 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2024 | 98 | 95 |
| Q4 2024 | 123 | 95 |
| Q1 2025 | 131 | 118 |
| Q2 2025 | 167 | 115 |
| Q3 2025 | 153 | 142 |
| Q4 2025 | 206 | 133 |
| Q1 2026 | 196 | 157 |
| Q2 2026 | 215 | 157 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2025 | $50.2m | $13.8m | 0.27 |
| Q4 2025 | $22.4m | $17.4m | 0.78 |
| Q1 2026 | $57.5m | $11.9m | 0.21 |
| Q2 2026 | $72.2m | $10.6m | 0.15 |
Biggest buyers
| WESTFIELD CAPITAL MANAGEMENT CO LP | New | +2.0m |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | New | +1.7m |
| FULLER & THALER ASSET MANAGEMENT, INC. | New | +1.2m |
| BlackRock, Inc. | Added | +1.0m |
| Blue Sparrow, LLC /DE | Added | +860.1k |
| PRICE T ROWE ASSOCIATES INC /MD/ | Added | +639.4k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Added | +542.8k |
| AMERICAN CENTURY COMPANIES INC | Added | +496.0k |
| MORGAN STANLEY | Added | +429.5k |
| Driehaus Capital Management LLC | Added | +424.3k |
Biggest sellers
| UBS Group AG | Reduced | -1.1m |
| ARMISTICE CAPITAL, LLC | Reduced | -1.0m |
| TORONTO DOMINION BANK | Reduced | -860.1k |
| Woodline Partners LP | Sold out | -745.0k |
| BNP PARIBAS FINANCIAL MARKETS | Reduced | -541.8k |
| Balyasny Asset Management L.P. | Reduced | -440.0k |
| BANK OF AMERICA CORP /DE/ | Reduced | -434.6k |
| MACKENZIE FINANCIAL CORP | Reduced | -314.2k |
| SG Americas Securities, LLC | Reduced | -274.1k |
| PANAGORA ASSET MANAGEMENT INC | Reduced | -262.4k |
Biggest calls
| ARMISTICE CAPITAL, LLC | Added | $53.8m660.0k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $5.0m61.3k shares |
| GROUP ONE TRADING LLC | Added | $3.6m44.1k shares |
| SIMPLEX TRADING, LLC | Added | $2.8m34.6k shares |
| Caption Management, LLC | Reduced | $2.4m30.0k shares |
| Verition Fund Management LLC | New | $1.6m20.0k shares |
| IMC-Chicago, LLC | Added | $1.5m17.9k shares |
| JANE STREET GROUP, LLC | Added | $856.5k10.5k shares |
| CITADEL ADVISORS LLC | Reduced | $530.2k6.5k shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $3.5m43.3k shares |
| JANE STREET GROUP, LLC | Added | $2.9m35.0k shares |
| Caption Management, LLC | New | $2.4m30.0k shares |
| CITADEL ADVISORS LLC | Added | $1.0m12.5k shares |
| IMC-Chicago, LLC | Added | $432.3k5.3k shares |
| SIMPLEX TRADING, LLC | Reduced | $277.3k3.4k shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| BlackRock, Inc. 13G · institution +6.8 pts · filed 2025-12-04 | 14.8% |
| JANUS HENDERSON GROUP PLC 13G · institution +2.7 pts · filed 2026-05-15 | 8.7% |
| ARMISTICE CAPITAL, LLC 13G · institution -1.4 pts · filed 2025-05-15 | 6.9% |
| VANGUARD PORTFOLIO MANAGEMENT LLC 13G · institution new · filed 2026-04-29 | 5.9% |
| STATE STREET CORP 13G · institution new · filed 2026-02-09 | 5.2% |
| VANGUARD CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-04-30 | 5.2% |
Fell to 5% or below in the last year: TORONTO DOMINION BANK (3.7%, 2026-05-15), VANGUARD GROUP INC (0.0%, 2026-03-27; now reported by VANGUARD PORTFOLIO MANAGEMENT LLC), WELLINGTON MANAGEMENT GROUP LLP (4.8%, 2026-02-10)
Insider purchases and sales since 1 Apr 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2024 | 0 | — | 5 | $11.3m | $11.3m |
| Q1 2025 | 0 | — | 9 | $7.8m | $7.5m |
| Q2 2025 | 0 | — | 3 | $308.5k | $178.8k |
| Q3 2025 | 0 | — | 7 | $7.7m | $6.9m |
| Q4 2025 | 0 | — | 6 | $27.4m | $27.4m |
| Q1 2026 | 0 | — | 10 | $9.3m | $9.3m |
| Q2 2026 | 0 | — | 6 | $14.2m | $14.2m |
| Q3 2026 | 0 | — | 6 | $13.7m | $13.7m |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2026-09-17 | SCHMERTZLER MICHAEL Director · See footnote | Sold plan | $678.5k10.0k shares |
| 2026-09-16 | SCHMERTZLER MICHAEL Director · See footnote | Sold plan | $671.2k10.0k shares |
| 2026-09-10 | SCHMERTZLER MICHAEL Director · See footnote | Sold plan | $673.4k10.0k shares |
| 2026-09-09 | SCHMERTZLER MICHAEL Director · See footnote | Sold plan | $678.4k10.0k shares |
| 2026-08-27 | SCHMERTZLER MICHAEL Director · See footnote | Sold plan | $894.8k12.5k shares |
| 2026-08-26 | SCHMERTZLER MICHAEL Director · See footnote | Sold plan | $911.7k12.5k shares |
| 2026-08-20 | SCHMERTZLER MICHAEL Director · See footnote | Sold plan | $888.9k12.5k shares |
| 2026-08-19 | SCHMERTZLER MICHAEL Director · See footnote | Sold plan | $916.6k12.5k shares |
| 2026-08-17 | Boulding Mark Elliott EXEC. VP AND CLO | Sold plan | $204.1k2.8k shares |
| 2026-08-04 | Klein Matthew B. CHIEF EXECUTIVE OFFICER, director | Sold plan | $705.7k10.3k shares |
| 2026-07-14 | Gravier Pierre CHIEF FINANCIAL OFFICER | Sold plan | $280.7k3.5k shares |
| 2026-07-09 | Smith Mary L. Director | Sold plan | $1.4m15.8k shares |
| 2026-07-09 | Almstead Neil Gregory CHIEF TECHNICAL OPS OFFICER | Sold plan | $222.4k2.5k shares |
| 2026-07-07 | Almstead Neil Gregory CHIEF TECHNICAL OPS OFFICER | Sold plan | $2.2m24.6k shares |
| 2026-07-06 | Almstead Neil Gregory CHIEF TECHNICAL OPS OFFICER | Sold plan | $1.9m22.2k shares |
| 2026-07-06 | Boulding Mark Elliott EXEC. VP AND CLO | Sold plan | $432.1k5.1k shares |
| 2026-06-26 | Almstead Neil Gregory CHIEF TECHNICAL OPS OFFICER | Sold plan | $693.2k8.1k shares |
| 2026-06-25 | Almstead Neil Gregory CHIEF TECHNICAL OPS OFFICER | Sold plan | $1.8m21.0k shares |
| 2026-06-24 | Almstead Neil Gregory CHIEF TECHNICAL OPS OFFICER | Sold plan | $452.6k5.3k shares |
| 2026-06-22 | Almstead Neil Gregory CHIEF TECHNICAL OPS OFFICER | Sold plan | $1.9m23.7k shares |
| 2026-06-17 | Utter Christine Marie SVP, CHIEF ACCOUNTING OFFICER | Sold plan | $1.5m19.7k shares |
| 2026-06-17 | Boulding Mark Elliott EXEC. VP AND CLO | Sold plan | $822.9k10.5k shares |
| 2026-06-10 | Pauwels Eric CHIEF BUSINESS OFFICER | Sold plan | $1.6m21.3k shares |
| 2026-05-15 | Boulding Mark Elliott EXEC. VP AND CLO | Sold plan | $203.0k2.8k shares |
| 2026-05-14 | Klein Matthew B. CHIEF EXECUTIVE OFFICER, director | Sold plan | $917.2k12.6k shares |
| 2026-05-08 | Boulding Mark Elliott EXEC. VP AND CLO | Sold plan | $279.6k3.5k shares |
| 2026-04-21 | Klein Matthew B. CHIEF EXECUTIVE OFFICER, director | Sold plan | $202.1k2.9k shares |
| 2026-04-06 | Boulding Mark Elliott EXEC. VP AND CLO | Sold plan | $157.3k2.3k shares |
| 2026-04-02 | Golden Lee Scott EVP & CHIEF MEDICAL OFFICER | Sold plan | $56.4k829 shares |
| 2026-04-01 | Almstead Neil Gregory CHIEF TECHNICAL OPS OFFICER | Sold plan | $3.6m52.0k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| BlackRock, Inc. 0.02% of their portfolio | 14.0m $1.1bn | Added +1.0m |
| RTW INVESTMENTS, LP 5.39% of their portfolio | 7.7m $631.9m | Unchanged |
| Jupiter Topco LLC 0.24% of their portfolio | 7.2m $590.2m | First filing |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.02% of their portfolio | 4.9m $402.0m | Added +123.5k |
| STATE STREET CORP 0.01% of their portfolio | 4.6m $375.1m | Added +252.4k |
| WELLINGTON MANAGEMENT GROUP LLP 0.06% of their portfolio | 4.1m $336.7m | Added +185.7k |
| VANGUARD CAPITAL MANAGEMENT LLC 0.01% of their portfolio | 3.7m $305.0m | Added +62.9k |
| GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 2.2m $180.1m | Reduced -2.6k |
| TORONTO DOMINION BANK 0.29% of their portfolio | 2.2m $176.7m | Reduced -860.1k |
| WESTFIELD CAPITAL MANAGEMENT CO LP 0.52% of their portfolio | 2.0m $159.6m | New |
| Hood River Capital Management LLC 1.03% of their portfolio | 1.7m $141.8m | Added +74.1k |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 0.42% of their portfolio | 1.7m $140.5m | New |
| D. E. Shaw & Co., Inc. 0.08% of their portfolio | 1.5m $126.3m | Reduced -91.5k |
| TANG CAPITAL MANAGEMENT LLC 5.56% of their portfolio | 1.5m $122.4m | Unchanged |
| BANK OF AMERICA CORP /DE/ 0.01% of their portfolio | 1.5m $118.5m | Reduced -434.6k |
| Driehaus Capital Management LLC 0.68% of their portfolio | 1.4m $117.5m | Added +424.3k |
| FMR LLC 0.00% of their portfolio | 1.4m $114.1m | Reduced -130.1k |
| Jefferies Financial Group Inc. 1.02% of their portfolio | 1.4m $110.7m | Added +2.6k |
| FULLER & THALER ASSET MANAGEMENT, INC. 0.26% of their portfolio | 1.2m $94.4m | New |
| Pictet Asset Management Holding SA 0.09% of their portfolio | 1.1m $93.6m | Reduced -35.9k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.01% of their portfolio | 1.1m $90.9m | Added +639.4k |
| MORGAN STANLEY 0.00% of their portfolio | 1.1m $90.0m | Added +429.5k |
| ARMISTICE CAPITAL, LLC 2.42% of their portfolio | 1.1m $87.4m | Reduced -1.0m |
| Blue Sparrow, LLC /DE 0.83% of their portfolio | 1.1m $85.7m | Added +860.1k |
| FRANKLIN RESOURCES INC 0.02% of their portfolio | 1.0m $83.8m | Reduced -94.1k |
| Invesco Ltd. 0.01% of their portfolio | 941.6k $76.8m | Added +76.1k |
| Palo Alto Investors LP 10.36% of their portfolio | 918.8k $75.0m | Reduced -2.8k |
| NORTHERN TRUST CORP 0.01% of their portfolio | 880.0k $71.8m | Added +73.8k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.01% of their portfolio | 790.1k $64.4m | Added +58.5k |
| CITADEL ADVISORS LLC 0.04% of their portfolio | 747.8k $61.0m | Added +362.6k |
| RENAISSANCE TECHNOLOGIES LLC 0.08% of their portfolio | 723.5k $59.0m | Added +190.2k |
| Boston Partners 0.05% of their portfolio | 718.6k $58.6m | Added +71.1k |
| JUPITER ASSET MANAGEMENT LTD 0.29% of their portfolio | 707.5k $57.7m | Reduced -4.0k |
| MARSHALL WACE, LLP 0.05% of their portfolio | 704.8k $57.5m | Added +244.1k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 684.0k $56.1m | Added +338.0k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.02% of their portfolio | 654.4k $53.4m | Added +542.8k |
| DIMENSIONAL FUND ADVISORS LP 0.01% of their portfolio | 637.7k $52.0m | Reduced -253.0k |
| GOLDMAN SACHS GROUP INC 0.01% of their portfolio | 618.2k $50.4m | Reduced -209.4k |
| SG Americas Securities, LLC 0.03% of their portfolio | 605.6k $49.4m | Reduced -274.1k |
| LOOMIS SAYLES & CO L P 0.06% of their portfolio | 590.4k $48.2m | Added +96.8k |
| LORD, ABBETT & CO. LLC 0.14% of their portfolio | 590.1k $48.1m | Reduced -27.0k |
| VANGUARD FIDUCIARY TRUST CO 0.01% of their portfolio | 587.9k $48.0m | Added +34.2k |
| Nuveen, LLC 0.01% of their portfolio | 583.8k $47.6m | Reduced -83.2k |
| Bank of New York Mellon Corp 0.01% of their portfolio | 553.5k $45.1m | Added +30.7k |
| PRINCIPAL FINANCIAL GROUP INC 0.02% of their portfolio | 541.6k $44.2m | Added +26.6k |
| VOYA INVESTMENT MANAGEMENT LLC 0.04% of their portfolio | 539.3k $44.0m | Added +196.7k |
| Ensign Peak Advisors, Inc 0.07% of their portfolio | 508.1k $41.4m | Reduced -74.3k |
| AMERICAN CENTURY COMPANIES INC 0.02% of their portfolio | 501.0k $40.9m | Added +496.0k |
| FEDERATED HERMES, INC. 0.06% of their portfolio | 483.4k $39.4m | Added +257.5k |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.03% of their portfolio | 442.0k $36.1m | Added +16.7k |
| Parkman Healthcare Partners LLC 3.65% of their portfolio | 435.7k $35.5m | Added +4.3k |
| Defilade Capital Management, L.P. 4.74% of their portfolio | 433.7k $35.4m | Added +57.5k |
| Russell Investments Group, Ltd. 0.03% of their portfolio | 418.0k $34.1m | Added +82.6k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.03% of their portfolio | 395.7k $32.3m | Added +187.7k |
| BNP PARIBAS FINANCIAL MARKETS 0.02% of their portfolio | 378.7k $30.9m | Reduced -541.8k |
| Legal & General Group Plc 0.01% of their portfolio | 352.7k $28.8m | Added +9.4k |
| AQR CAPITAL MANAGEMENT LLC 0.01% of their portfolio | 332.3k $27.1m | Reduced -9.9k |
| Qube Research & Technologies Ltd 0.03% of their portfolio | 311.4k $25.4m | Reduced -202.4k |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. 0.02% of their portfolio | 303.7k $24.8m | Reduced -8.1k |
| Rockefeller Capital Management L.P. 0.04% of their portfolio | 302.4k $24.7m | Reduced -82.3k |
| DEUTSCHE BANK AG\ 0.01% of their portfolio | 296.9k $24.2m | Added +58.1k |
| Public Sector Pension Investment Board 0.06% of their portfolio | 285.0k $23.2m | Reduced -46.8k |
| SEGALL BRYANT & HAMILL, LLC 0.26% of their portfolio | 271.7k $22.2m | Added +76.4k |
| UBS Group AG 0.00% of their portfolio | 262.4k $21.4m | Reduced -1.1m |
| Boxer Capital Management, LLC 1.23% of their portfolio | 200.0k $16.3m | Unchanged |
| RHUMBLINE ADVISERS 0.01% of their portfolio | 192.7k $15.7m | Reduced -19.8k |
| PRUDENTIAL FINANCIAL INC 0.02% of their portfolio | 185.8k $15.2m | Added +21.2k |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 171.9k $14.0m | Added +5.2k |
| Rock Springs Capital Management LP 0.65% of their portfolio | 162.3k $13.2m | Added +500 |
| Hudson Bay Capital Management LP 0.06% of their portfolio | 159.8k $13.0m | Added +156.1k |
| Schonfeld Strategic Advisors LLC 0.06% of their portfolio | 147.4k $12.0m | Reduced -171.0k |
| Swiss National Bank 0.01% of their portfolio | 141.5k $11.5m | Reduced -1.4k |
| Universal- Beteiligungs- und Servicegesellschaft mbH 0.02% of their portfolio | 135.6k $11.1m | Added +6.0k |
| HSBC HOLDINGS PLC 0.01% of their portfolio | 131.4k $10.8m | Reduced -95.7k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 126.0k $10.3m | Reduced -952 |
| SEI INVESTMENTS CO 0.01% of their portfolio | 125.4k $10.2m | Reduced -4.8k |
| CITIGROUP INC 0.00% of their portfolio | 118.7k $9.7m | Added +96.5k |
| FIRST TRUST ADVISORS LP 0.01% of their portfolio | 113.4k $9.2m | Reduced -22.6k |
| Longaeva Partners L.P. 0.26% of their portfolio | 111.8k $9.1m | New |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 105.9k $7.2m | Reduced -46.2k |
| SCHRODER INVESTMENT MANAGEMENT GROUP 0.01% of their portfolio | 101.4k $8.3m | Reduced -33.5k |
| SECTOR GAMMA AS 1.77% of their portfolio | 100.0k $8.2m | Added +25.0k |
| WCM INVESTMENT MANAGEMENT, LLC 0.01% of their portfolio | 93.8k $7.7m | Reduced -888 |
| PANAGORA ASSET MANAGEMENT INC 0.02% of their portfolio | 89.0k $7.3m | Reduced -262.4k |
| BESSEMER GROUP INC 0.01% of their portfolio | 85.1k $6.9m | Added +32.2k |
| Aquatic Capital Management LLC 0.23% of their portfolio | 83.5k $6.8m | Added +63.5k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 83.1k $6.8m | Added +52.7k |
| XTX Topco Ltd 0.09% of their portfolio | 81.9k $6.7m | Added +66.3k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.01% of their portfolio | 81.7k $6.7m | Reduced -2.6k |
| Empowered Funds, LLC 0.03% of their portfolio | 81.3k $6.6m | Added +23.4k |
| MOORE CAPITAL MANAGEMENT, LP 0.14% of their portfolio | 75.6k $6.2m | Added +30.9k |
| PINNACLE ASSOCIATES LTD 0.06% of their portfolio | 70.4k $5.7m | Reduced -4.5k |
| RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio | 69.7k $5.7m | Added +17.2k |
| VANGUARD ASSET MANAGEMENT, Ltd 0.00% of their portfolio | 68.8k $5.6m | Added +3.6k |
| CANADA LIFE ASSURANCE Co 0.01% of their portfolio | 64.1k $5.2m | Reduced -1.3k |
| Capricorn Fund Managers Ltd 0.42% of their portfolio | 63.9k $5.2m | New |
| BARCLAYS PLC 0.00% of their portfolio | 58.4k $4.8m | Added +5.3k |
| INTECH INVESTMENT MANAGEMENT LLC 0.04% of their portfolio | 57.6k $4.7m | Added +1.6k |
| ExodusPoint Capital Management, LP 0.04% of their portfolio | 57.3k $4.7m | New |
| LOS ANGELES CAPITAL MANAGEMENT LLC 0.02% of their portfolio | 55.9k $4.6m | Reduced -15.7k |