PTCT PTC Therapeutics, Inc.
PTC Therapeutics, Inc. (PTCT) Institutional Ownership
What the institutions did with PTCT last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| BlackRock, Inc. | 14.0M | 13.9% |
| RTW INVESTMENTS, LP | 7.7M | 7.7% |
| Jupiter Topco LLC | 7.2M | 7.2% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 4.9M | 4.9% |
| STATE STREET CORP | 4.6M | 4.6% |
| WELLINGTON MANAGEMENT GROUP LLP | 4.1M | 4.1% |
| VANGUARD CAPITAL MANAGEMENT LLC | 3.7M | 3.7% |
| GEODE CAPITAL MANAGEMENT, LLC | 2.2M | 2.2% |
| TORONTO DOMINION BANK | 2.2M | 2.2% |
| WESTFIELD CAPITAL MANAGEMENT CO LP | 2.0M | 1.9% |
| Hood River Capital Management LLC | 1.7M | 1.7% |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | 1.7M | 1.7% |
| D. E. Shaw & Co., Inc. | 1.5M | 1.5% |
| TANG CAPITAL MANAGEMENT LLC | 1.5M | 1.5% |
| BANK OF AMERICA CORP /DE/ | 1.5M | 1.4% |
| Driehaus Capital Management LLC | 1.4M | 1.4% |
| FMR LLC | 1.4M | 1.4% |
| Jefferies Financial Group Inc. | 1.4M | 1.3% |
| FULLER & THALER ASSET MANAGEMENT, INC. | 1.2M | 1.2% |
| Pictet Asset Management Holding SA | 1.1M | 1.1% |
| PRICE T ROWE ASSOCIATES INC /MD/ | 1.1M | 1.1% |
| MORGAN STANLEY | 1.1M | 1.1% |
| ARMISTICE CAPITAL, LLC | 1.1M | 1.1% |
| Blue Sparrow, LLC /DE | 1.1M | 1.0% |
| FRANKLIN RESOURCES INC | 1.0M | 1.0% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| WESTFIELD CAPITAL MANAGEMENT CO LP | New | 0 | 2.0M | +2.0M |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | New | 0 | 1.7M | +1.7M |
| FULLER & THALER ASSET MANAGEMENT, INC. | New | 0 | 1.2M | +1.2M |
| UBS Group AG | Reduced | 1.4M | 262.4K | -1.1M |
| BlackRock, Inc. | Increased | 12.9M | 14.0M | +1.0M |
| ARMISTICE CAPITAL, LLC | Reduced | 2.1M | 1.1M | -1.0M |
| TORONTO DOMINION BANK | Reduced | 3.0M | 2.2M | -860.1K |
| Blue Sparrow, LLC /DE | Increased | 190.6K | 1.1M | +860.1K |
| Woodline Partners LP | Sold Out | 745.0K | 0 | -745.0K |
| PRICE T ROWE ASSOCIATES INC /MD/ | Increased | 475.1K | 1.1M | +639.4K |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Increased | 111.6K | 654.4K | +542.8K |
| BNP PARIBAS FINANCIAL MARKETS | Reduced | 920.5K | 378.7K | -541.8K |
| AMERICAN CENTURY COMPANIES INC | Increased | 5.0K | 501.0K | +496.0K |
| Balyasny Asset Management L.P. | Reduced | 460.6K | 20.6K | -440.0K |
| BANK OF AMERICA CORP /DE/ | Reduced | 1.9M | 1.5M | -434.6K |
| MORGAN STANLEY | Increased | 674.1K | 1.1M | +429.5K |
| Driehaus Capital Management LLC | Increased | 1.0M | 1.4M | +424.3K |
| CITADEL ADVISORS LLC | Increased | 385.2K | 747.8K | +362.6K |
| JPMORGAN CHASE & CO | Increased | 346.0K | 684.0K | +338.0K |
| MACKENZIE FINANCIAL CORP | Reduced | 345.7K | 31.5K | -314.2K |
| SG Americas Securities, LLC | Reduced | 879.7K | 605.6K | -274.1K |
| PANAGORA ASSET MANAGEMENT INC | Reduced | 351.4K | 89.0K | -262.4K |
| FEDERATED HERMES, INC. | Increased | 225.9K | 483.4K | +257.5K |
| DIMENSIONAL FUND ADVISORS LP | Reduced | 890.7K | 637.7K | -253.0K |
| STATE STREET CORP | Increased | 4.3M | 4.6M | +252.4K |
| MARSHALL WACE, LLP | Increased | 460.6K | 704.8K | +244.1K |
| Allianz Asset Management GmbH | Increased | 7.4K | 231.1K | +223.7K |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | Sold Out | 213.4K | 0 | -213.4K |
| GOLDMAN SACHS GROUP INC | Reduced | 827.6K | 618.2K | -209.4K |
| Qube Research & Technologies Ltd | Reduced | 513.8K | 311.4K | -202.4K |
| VOYA INVESTMENT MANAGEMENT LLC | Increased | 342.6K | 539.3K | +196.7K |
| RENAISSANCE TECHNOLOGIES LLC | Increased | 533.3K | 723.5K | +190.2K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Increased | 207.9K | 395.7K | +187.7K |
| WELLINGTON MANAGEMENT GROUP LLP | Increased | 3.9M | 4.1M | +185.7K |
| Schonfeld Strategic Advisors LLC | Reduced | 318.4K | 147.4K | -171.0K |
| Hudson Bay Capital Management LP | Increased | 3.7K | 159.8K | +156.1K |
| FMR LLC | Reduced | 1.5M | 1.4M | -130.1K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 4.8M | 4.9M | +123.5K |
| NEUBERGER BERMAN GROUP LLC | Reduced | 121.5K | 5.8K | -115.8K |
| Longaeva Partners L.P. | New | 0 | 111.8K | +111.8K |
| CAPITAL FUND MANAGEMENT S.A. | Reduced | 121.3K | 13.9K | -107.4K |
| LOOMIS SAYLES & CO L P | Increased | 493.6K | 590.4K | +96.8K |
| CITIGROUP INC | Increased | 22.1K | 118.7K | +96.5K |
| HSBC HOLDINGS PLC | Reduced | 227.1K | 131.4K | -95.7K |
| FRANKLIN RESOURCES INC | Reduced | 1.1M | 1.0M | -94.1K |
| D. E. Shaw & Co., Inc. | Reduced | 1.6M | 1.5M | -91.5K |
| ROYCE & ASSOCIATES LP | Reduced | 92.8K | 9.5K | -83.3K |
| Nuveen, LLC | Reduced | 667.0K | 583.8K | -83.2K |
| Russell Investments Group, Ltd. | Increased | 335.4K | 418.0K | +82.6K |
| Rockefeller Capital Management L.P. | Reduced | 384.7K | 302.4K | -82.3K |
| BI Asset Management Fondsmaeglerselskab A/S | Sold Out | 81.9K | 0 | -81.9K |
| SEGALL BRYANT & HAMILL, LLC | Increased | 195.4K | 271.7K | +76.4K |
| Invesco Ltd. | Increased | 865.5K | 941.6K | +76.1K |
| Ensign Peak Advisors, Inc | Reduced | 582.3K | 508.1K | -74.3K |
| Hood River Capital Management LLC | Increased | 1.7M | 1.7M | +74.1K |
| NORTHERN TRUST CORP | Increased | 806.3K | 880.0K | +73.8K |
| Boston Partners | Increased | 647.5K | 718.6K | +71.1K |
| XTX Topco Ltd | Increased | 15.7K | 81.9K | +66.3K |
| Capricorn Fund Managers Ltd | New | 0 | 63.9K | +63.9K |
| Aquatic Capital Management LLC | Increased | 19.9K | 83.5K | +63.5K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.