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 ($2.5m this quarter). Holder counts are more reliable. Shares outstanding: 79.4m as of 2025-08-05, 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 ≈ $48.84. Options: 10 managers hold calls ($13.1m notional), 9 hold puts ($7.7m).
Trends to Q2 2025
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 |
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 2023 | 104 | 105 |
| Q4 2023 | 93 | 87 |
| Q1 2024 | 83 | 90 |
| Q2 2024 | 119 | 88 |
| Q3 2024 | 98 | 95 |
| Q4 2024 | 123 | 95 |
| Q1 2025 | 131 | 118 |
| Q2 2025 | 167 | 115 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2024 | $5.7m | $2.5m | 0.44 |
| Q4 2024 | $10.6m | $28.2m | 2.66 |
| Q1 2025 | $15.8m | $12.5m | 0.79 |
| Q2 2025 | $13.1m | $7.7m | 0.59 |
Biggest buyers
| D. E. Shaw & Co., Inc. | Added | +992.4k |
| BANK OF AMERICA CORP /DE/ | Added | +865.3k |
| Pacer Advisors, Inc. | New | +740.8k |
| Hood River Capital Management LLC | Added | +552.1k |
| ROYAL BANK OF CANADA | Added | +542.8k |
| STATE STREET CORP | Added | +541.6k |
| Rockefeller Capital Management L.P. | Added | +470.8k |
| Man Group plc | Added | +410.7k |
| LORD, ABBETT & CO. LLC | New | +384.4k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | +325.7k |
Biggest sellers
| Camber Capital Management LP | Sold out | -1.5m |
| Point72 Asset Management, L.P. | Sold out | -1.4m |
| WELLINGTON MANAGEMENT GROUP LLP | Reduced | -725.0k |
| ARMISTICE CAPITAL, LLC | Reduced | -699.4k |
| UBS Group AG | Reduced | -690.7k |
| Driehaus Capital Management LLC | Reduced | -453.6k |
| FMR LLC | Reduced | -295.3k |
| BlackRock, Inc. | Reduced | -287.8k |
| CITADEL ADVISORS LLC | Reduced | -247.1k |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC | Reduced | -216.8k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $7.0m142.7k shares |
| CITADEL ADVISORS LLC | Added | $1.7m34.8k shares |
| CITIGROUP INC | Unchanged | $1.5m30.0k shares |
| Caption Management, LLC | New | $1.5m30.0k shares |
| BARCLAYS PLC | New | $483.5k9.9k shares |
| GROUP ONE TRADING LLC | New | $439.6k9.0k shares |
| JANE STREET GROUP, LLC | Reduced | $327.2k6.7k shares |
| SIMPLEX TRADING, LLC | Added | $190.0k3.9k shares |
| SteelPeak Wealth, LLC | Unchanged | $34.2k700 shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $3.3m68.3k shares |
| CITIGROUP INC | Unchanged | $1.5m30.0k shares |
| Caption Management, LLC | New | $1.5m30.0k shares |
| CITADEL ADVISORS LLC | Added | $591.0k12.1k shares |
| WOLVERINE TRADING, LLC | New | $493.4k9.9k shares |
| GROUP ONE TRADING LLC | Added | $278.4k5.7k shares |
| SIMPLEX TRADING, LLC | Added | $48.0k1.0k shares |
| Walleye Capital LLC | New | $24.4k500 shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 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 in Q2 2025
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 |
|---|---|---|---|---|---|
| Q3 2023 | 0 | — | 1 | $465.0k | — |
| Q4 2023 | 1 | $198.7k | 0 | — | — |
| Q1 2024 | 0 | — | 8 | $1.3m | $1.3m |
| Q2 2024 | 0 | — | 4 | $921.8k | $887.1k |
| Q3 2024 | 0 | — | 1 | $77.2k | $77.2k |
| Q4 2024 | 0 | — | 5 | $11.3m | $11.3m |
| Q1 2025 | 0 | — | 9 | $7.8m | $7.5m |
| Q2 2025 | 0 | — | 3 | $308.5k | $178.8k |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2025-05-16 | Boulding Mark Elliott EXEC. VP AND CLO | Sold | $40.6k883 shares |
| 2025-05-15 | Boulding Mark Elliott EXEC. VP AND CLO | Sold | $89.1k1.9k shares |
| 2025-04-22 | Klein Matthew B. CHIEF EXECUTIVE OFFICER, director | Sold plan | $136.7k2.8k shares |
| 2025-04-02 | Golden Lee Scott EVP & CHIEF MEDICAL OFFICER | Sold plan | $42.1k897 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 2025
| Manager | Shares | Change |
|---|---|---|
| VANGUARD GROUP INC 0.01% of their portfolio | 8.8m $432.1m | Added +240.1k |
| RTW INVESTMENTS, LP 5.39% of their portfolio | 7.7m $378.3m | Added +263.3k |
| BlackRock, Inc. 0.01% of their portfolio | 7.5m $365.3m | Reduced -287.8k |
| ARMISTICE CAPITAL, LLC 8.77% of their portfolio | 4.7m $231.3m | Reduced -699.4k |
| WELLINGTON MANAGEMENT GROUP LLP 0.04% of their portfolio | 4.7m $229.3m | Reduced -725.0k |
| JANUS HENDERSON GROUP PLC 0.08% of their portfolio | 3.2m $155.0m | Added +258.3k |
| STATE STREET CORP 0.01% of their portfolio | 3.0m $146.3m | Added +541.6k |
| TORONTO DOMINION BANK 0.26% of their portfolio | 2.4m $119.5m | Reduced -167.2k |
| D. E. Shaw & Co., Inc. 0.12% of their portfolio | 2.4m $119.1m | Added +992.4k |
| GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 1.9m $94.5m | Added +60.7k |
| FMR LLC 0.00% of their portfolio | 1.7m $83.9m | Reduced -295.3k |
| BANK OF AMERICA CORP /DE/ 0.01% of their portfolio | 1.4m $67.5m | Added +865.3k |
| FRANKLIN RESOURCES INC 0.02% of their portfolio | 1.3m $62.3m | Added +1.8k |
| MORGAN STANLEY 0.00% of their portfolio | 1.2m $56.8m | Added +213.9k |
| TANG CAPITAL MANAGEMENT LLC 2.72% of their portfolio | 1.1m $53.7m | Added +100.0k |
| Driehaus Capital Management LLC 0.41% of their portfolio | 1.1m $51.7m | Reduced -453.6k |
| Pictet Asset Management Holding SA 0.05% of their portfolio | 1.0m $51.1m | Reduced -1.0k |
| Nuveen, LLC 0.01% of their portfolio | 968.9k $47.3m | Reduced -40.3k |
| RENAISSANCE TECHNOLOGIES LLC 0.06% of their portfolio | 963.3k $47.0m | Added +293.1k |
| Rockefeller Capital Management L.P. 0.05% of their portfolio | 926.2k $45.2m | Added +470.8k |
| CITADEL ADVISORS LLC 0.04% of their portfolio | 920.5k $45.0m | Reduced -247.1k |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. 0.09% of their portfolio | 789.5k $38.6m | Added +160.8k |
| GOLDMAN SACHS GROUP INC 0.01% of their portfolio | 775.8k $37.9m | Added +173.1k |
| Pacer Advisors, Inc. 0.09% of their portfolio | 740.8k $36.2m | New |
| NORTHERN TRUST CORP 0.00% of their portfolio | 739.2k $36.1m | Reduced -4.8k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.01% of their portfolio | 707.7k $34.6m | Added +45.6k |
| Man Group plc 0.07% of their portfolio | 671.5k $32.8m | Added +410.7k |
| Hood River Capital Management LLC 0.43% of their portfolio | 636.5k $31.1m | Added +552.1k |
| Assenagon Asset Management S.A. 0.05% of their portfolio | 631.6k $30.8m | Added +293.7k |
| ADAGE CAPITAL PARTNERS GP, L.L.C. 0.05% of their portfolio | 605.9k $29.6m | Added +10.9k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 601.6k $29.4m | Reduced -1.9k |
| UBS Group AG 0.01% of their portfolio | 579.0k $28.3m | Reduced -690.7k |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 544.7k $26.6m | Added +542.8k |
| MARSHALL WACE, LLP 0.03% of their portfolio | 537.8k $26.3m | Reduced -203.2k |
| AQR CAPITAL MANAGEMENT LLC 0.02% of their portfolio | 537.1k $26.2m | Added +124.1k |
| DIMENSIONAL FUND ADVISORS LP 0.01% of their portfolio | 527.4k $25.8m | Reduced -34.4k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 453.6k $22.2m | Reduced -15.0k |
| MPM BIOIMPACT LLC 3.71% of their portfolio | 438.5k $21.4m | Reduced -1.5k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.03% of their portfolio | 431.7k $21.1m | Added +325.7k |
| Palo Alto Investors LP 4.22% of their portfolio | 406.5k $19.9m | Added +2.3k |
| LORD, ABBETT & CO. LLC 0.06% of their portfolio | 384.4k $18.8m | New |
| MILLENNIUM MANAGEMENT LLC 0.02% of their portfolio | 384.4k $18.8m | Added +159.6k |
| Sofinnova Investments, Inc. 1.25% of their portfolio | 375.9k $18.4m | Reduced -203.4k |
| Qube Research & Technologies Ltd 0.02% of their portfolio | 338.2k $16.5m | Added +41.6k |
| Invesco Ltd. 0.00% of their portfolio | 303.2k $14.8m | Reduced -7.1k |
| CITIGROUP INC 0.01% of their portfolio | 288.5k $14.1m | Reduced -17.3k |
| PANAGORA ASSET MANAGEMENT INC 0.06% of their portfolio | 286.1k $14.0m | Reduced -25.7k |
| BARCLAYS PLC 0.01% of their portfolio | 279.8k $13.7m | Added +147.5k |
| Trexquant Investment LP 0.15% of their portfolio | 272.8k $13.3m | Added +79.0k |
| Ensign Peak Advisors, Inc 0.02% of their portfolio | 268.2k $13.1m | Reduced -6.0k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 266.2k $13.0m | Added +49.7k |
| VOYA INVESTMENT MANAGEMENT LLC 0.01% of their portfolio | 260.5k $12.7m | Added +36.2k |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC 0.04% of their portfolio | 243.6k $11.9m | Reduced -216.8k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 229.7k $11.2m | Added +50.9k |
| Legal & General Group Plc 0.00% of their portfolio | 222.8k $10.9m | Added +30.0k |
| CANADA PENSION PLAN INVESTMENT BOARD 0.01% of their portfolio | 211.0k $10.3m | Added +48.7k |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main 0.01% of their portfolio | 207.9k $10.2m | New |
| Squarepoint Ops LLC 0.02% of their portfolio | 182.0k $8.9m | Added +171.3k |
| Parkman Healthcare Partners LLC 1.03% of their portfolio | 181.6k $8.9m | Reduced -98.7k |
| Candriam S.C.A. 0.04% of their portfolio | 148.6k $7.3m | Reduced -10.5k |
| Swiss National Bank 0.00% of their portfolio | 135.6k $6.6m | Added +1.0k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 135.1k $6.6m | Reduced -206.7k |
| Russell Investments Group, Ltd. 0.01% of their portfolio | 131.7k $6.4m | Added +118.1k |
| ACADIAN ASSET MANAGEMENT LLC 0.01% of their portfolio | 127.8k $6.2m | Added +90.4k |
| BI Asset Management Fondsmaeglerselskab A/S 0.06% of their portfolio | 126.1k $6.2m | Added +124.9k |
| FIRST TRUST ADVISORS LP 0.00% of their portfolio | 125.3k $6.1m | Reduced -16.4k |
| Universal- Beteiligungs- und Servicegesellschaft mbH 0.01% of their portfolio | 124.3k $6.1m | Reduced -20.4k |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 118.5k $5.8m | Added +6.7k |
| Verition Fund Management LLC 0.03% of their portfolio | 115.4k $5.6m | Added +80.0k |
| Hillsdale Investment Management Inc. 0.19% of their portfolio | 107.8k $5.3m | Added +39.7k |
| Rafferty Asset Management, LLC 0.02% of their portfolio | 97.6k $4.8m | Added +40.6k |
| PINNACLE ASSOCIATES LTD 0.07% of their portfolio | 92.5k $4.5m | Reduced -31.9k |
| SECTOR GAMMA AS 1.47% of their portfolio | 92.2k $4.5m | Unchanged |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 92.0k $4.5m | Reduced -41.3k |
| RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio | 85.7k $4.2m | Added +29.7k |
| PRUDENTIAL FINANCIAL INC 0.01% of their portfolio | 84.2k $4.1m | Added +22.1k |
| VICTORY CAPITAL MANAGEMENT INC 0.00% of their portfolio | 72.2k $3.5m | Added +62.9k |
| SEI INVESTMENTS CO 0.00% of their portfolio | 69.1k $3.4m | Added +57.8k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 64.5k $3.2m | Added +99 |
| DARK FOREST CAPITAL MANAGEMENT LP 0.12% of their portfolio | 63.1k $3.1m | Added +46.4k |
| HUSSMAN STRATEGIC ADVISORS, INC. 0.70% of their portfolio | 63.0k $3.1m | Added +42.0k |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.01% of their portfolio | 60.2k $2.9m | Added +169 |
| IEQ CAPITAL, LLC 0.02% of their portfolio | 60.1k $2.9m | Added +16.2k |
| TWO SIGMA ADVISERS, LP 0.01% of their portfolio | 59.7k $2.9m | Reduced -129.7k |
| PRINCIPAL FINANCIAL GROUP INC 0.00% of their portfolio | 54.0k $2.6m | Added +48.2k |
| Jump Financial, LLC 0.03% of their portfolio | 51.6k $2.5m | New |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 50.9k $2.5m | Reduced -29.2k |
| Brevan Howard Capital Management LP 0.03% of their portfolio | 50.4k $2.5m | New |
| ROYCE & ASSOCIATES LP 0.03% of their portfolio | 50.2k $2.5m | New |
| JANE STREET GROUP, LLC 0.00% of their portfolio | 49.2k $2.4m | Reduced -109.4k |
| STATE OF WISCONSIN INVESTMENT BOARD 0.01% of their portfolio | 48.9k $2.4m | Reduced -17.9k |
| HARBOR CAPITAL ADVISORS, INC. 0.10% of their portfolio | 48.8k $2.4m | Added +8.0k |
| MetLife Investment Management, LLC 0.01% of their portfolio | 46.3k $2.3m | Added +2.0k |
| JUPITER ASSET MANAGEMENT LTD 0.02% of their portfolio | 46.1k $2.3m | New |
| LOS ANGELES CAPITAL MANAGEMENT LLC 0.01% of their portfolio | 45.9k $2.2m | Added +30.7k |
| Cubist Systematic Strategies, LLC 0.02% of their portfolio | 45.6k $2.2m | New |
| J. Goldman & Co LP 0.07% of their portfolio | 44.1k $2.2m | New |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 43.9k $2.1m | Added +4.6k |
| AMERICAN CENTURY COMPANIES INC 0.00% of their portfolio | 43.8k $2.1m | Reduced -12.4k |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ 0.00% of their portfolio | 43.0k $2.1m | Added +532 |