PTCT Institutional Ownership & Shareholders
PTC THERAPEUTICS INC (PTCT) is currently held by 364 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $7.98B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of PTCT tracked by InsiderSet, reporting ownership valued at approximately $1.14B in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $837.45M, representing an estimated loss of -26.48% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 53% of the total disclosed PTCT value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Rtw Investments, Lp, Janus Henderson Group Plc, and several other long-term asset managers with concentrated positions in PTC THERAPEUTICS INC (PTCT).
This page ranks the largest institutional PTCT shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
364
Total Reported Value
$7.98B
Largest Holder
Blackrock, Inc.
Largest Position
$1.14B
Insider Transactions (90d)
28
Latest Filing Quarter
Q2 2026
New Institutional Positions
54
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.02% | 13,964,554 | $1,139,088,671 | $837,454,303 | -$301,634,368 | -26.48% | |
| Rtw Investments, Lp | 5.39% | 7,746,415 | $631,875,072 | $464,552,508 | -$167,322,564 | -26.48% | |
| Janus Henderson Group Plc | 0.24% | 7,193,433 | $489,997,100 | $431,390,177 | -$58,606,923 | -11.96% | |
| Vanguard Portfolio Management Llc | 0.02% | 4,928,111 | $401,986,014 | $295,538,817 | -$106,447,197 | -26.48% | |
| State Street Corp | 0.01% | 4,598,952 | $375,136,515 | $275,799,151 | -$99,337,364 | -26.48% | |
| Wellington Management Group Llp | 0.06% | 4,128,273 | $336,743,228 | $247,572,532 | -$89,170,696 | -26.48% | |
| Vanguard Capital Management Llc | 0.01% | 3,739,127 | $305,000,589 | $224,235,446 | -$80,765,143 | -26.48% | |
| Geode Capital Management, Llc | 0.01% | 2,207,376 | $180,089,116 | $132,376,339 | -$47,712,777 | -26.49% | |
| Toronto Dominion Bank | 0.29% | 2,165,846 | $176,668,031 | $129,885,785 | -$46,782,246 | -26.48% | |
| Westfield Capital Management Co Lp | 0.52% | 1,956,156 | $159,563,645 | $117,310,675 | -$42,252,970 | -26.48% | |
| Hood River Capital Management Llc | 1.03% | 1,738,613 | $141,818,662 | $104,264,622 | -$37,554,040 | -26.48% | |
| William Blair Investment Management, Llc | 0.42% | 1,722,688 | $140,519,660 | $103,309,599 | -$37,210,061 | -26.48% | |
| D. E. Shaw & Co., Inc. | 0.08% | 1,548,919 | $126,345,323 | $92,888,672 | -$33,456,651 | -26.48% | |
| Tang Capital Management Llc | 5.56% | 1,500,000 | $122,355,000 | $89,955,000 | -$32,400,000 | -26.48% | |
| Bank Of America Corp | 0.01% | 1,452,277 | $118,462,234 | $87,093,052 | -$31,369,182 | -26.48% | |
| Driehaus Capital Management Llc | 0.68% | 1,440,107 | $117,469,528 | $86,363,217 | -$31,106,311 | -26.48% | |
| Fmr Llc | 0.00% | 1,398,261 | $114,056,206 | $83,853,712 | -$30,202,494 | -26.48% | |
| Jefferies Financial Group Inc. | 1.02% | 1,357,042 | $110,693,916 | $81,381,809 | -$29,312,107 | -26.48% | |
| Fuller & Thaler Asset Management, Inc. | 0.26% | 1,156,819 | $94,361,749 | $69,374,435 | -$24,987,314 | -26.48% | |
| Pictet Asset Management Holding Sa | 0.09% | 1,147,844 | $93,629,635 | $68,836,205 | -$24,793,430 | -26.48% | |
| Price T Rowe Associates Inc | 0.01% | 1,114,516 | $90,912,000 | $66,837,525 | -$24,074,475 | -26.48% | |
| Morgan Stanley | 0.00% | 1,103,675 | $90,026,886 | $66,187,390 | -$23,839,496 | -26.48% | |
| Armistice Capital, Llc | 2.42% | 1,071,395 | $87,393,690 | $64,251,558 | -$23,142,132 | -26.48% | |
| Blue Sparrow, Llc | 0.83% | 1,050,700 | $85,705,599 | $63,010,479 | -$22,695,120 | -26.48% | |
| Invesco Ltd. | 0.01% | 941,581 | $76,804,761 | $56,466,613 | -$20,338,148 | -26.48% | |
| Palo Alto Investors Lp | 10.36% | 918,846 | $74,950,268 | $55,103,195 | -$19,847,073 | -26.48% | |
| Northern Trust Corp | 0.01% | 880,029 | $71,783,966 | $52,775,339 | -$19,008,627 | -26.48% | |
| Charles Schwab Investment Management Inc | 0.01% | 790,112 | $64,449,436 | $47,383,017 | -$17,066,419 | -26.48% | |
| Citadel Advisors Llc | 0.04% | 747,822 | $60,999,840 | $44,846,885 | -$16,152,955 | -26.48% | |
| Renaissance Technologies LLC | Jim Simons | 0.08% | 723,500 | $59,015,895 | $43,388,295 | -$15,627,600 | -26.48% |
| Boston Partners | 0.05% | 718,574 | $58,606,553 | $43,092,883 | -$15,513,670 | -26.47% | |
| Jupiter Asset Management Ltd | 0.29% | 707,450 | $57,706,697 | $42,425,777 | -$15,280,921 | -26.48% | |
| Marshall Wace, Llp | 0.05% | 704,787 | $57,489,476 | $42,266,076 | -$15,223,400 | -26.48% | |
| Jpmorgan Chase & Co | 0.00% | 684,042 | $56,073,502 | $41,021,999 | -$15,051,503 | -26.84% | |
| Arrowstreet Capital, Limited Partnership | 0.02% | 654,382 | $53,377,940 | $39,243,289 | -$14,134,651 | -26.48% | |
| Dimensional Fund Advisors Lp | 0.01% | 637,704 | $52,017,434 | $38,243,109 | -$13,774,325 | -26.48% | |
| Goldman Sachs Group Inc | 0.01% | 618,247 | $50,430,408 | $37,076,273 | -$13,354,135 | -26.48% | |
| Sg Americas Securities, Llc | 0.03% | 605,581 | $49,397,000 | $36,316,693 | -$13,080,307 | -26.48% | |
| Loomis Sayles & Co L P | 0.06% | 590,374 | $48,156,807 | $35,404,729 | -$12,752,078 | -26.48% | |
| Lord, Abbett & Co. Llc | 0.14% | 590,074 | $48,132,000 | $35,386,738 | -$12,745,262 | -26.48% | |
| Vanguard Fiduciary Trust Co | 0.01% | 587,887 | $47,953,943 | $35,255,583 | -$12,698,360 | -26.48% | |
| Nuveen, Llc | 0.01% | 583,829 | $47,622,931 | $35,012,225 | -$12,610,706 | -26.48% | |
| Bank Of New York Mellon Corp | 0.01% | 553,462 | $45,145,865 | $33,191,116 | -$11,954,749 | -26.48% | |
| Voya Investment Management Llc | 0.04% | 539,319 | $43,992,251 | $32,342,960 | -$11,649,291 | -26.48% | |
| American Century Companies Inc | 0.02% | 500,995 | $40,866,277 | $30,044,670 | -$10,821,607 | -26.48% | |
| Ensign Peak Advisors, Inc | 0.07% | 582,318 | $39,673,325 | $34,921,610 | -$4,751,715 | -11.98% | |
| Federated Hermes, Inc. | 0.06% | 483,424 | $39,432,896 | $28,990,937 | -$10,441,959 | -26.48% | |
| Manufacturers Life Insurance Company, The | 0.03% | 441,957 | $36,050,432 | $26,504,161 | -$9,546,271 | -26.48% | |
| Parkman Healthcare Partners Llc | 3.65% | 435,691 | $35,539,315 | $26,128,389 | -$9,410,926 | -26.48% | |
| Defilade Capital Management, L.P. | 4.74% | 433,699 | $35,376,827 | $26,008,929 | -$9,367,898 | -26.48% |
Frequently asked questions about PTCT
Who are the largest institutional holders of PTCT?
The largest institutional holders of PTCT reported in the latest SEC Form 13F filings include Blackrock, Inc., Rtw Investments, Lp, Janus Henderson Group Plc, Vanguard Portfolio Management Llc, and State Street Corp. InsiderSet ranks institutional holders by their latest reported PTCT position.
What is PTCT institutional ownership?
This page tracks PTCT positions reported by institutional investment managers through SEC Form 13F. PTC THERAPEUTICS INC (PTCT) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own PTCT?
InsiderSet currently tracks 364 institutional managers reporting PTCT holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of PTCT shareholders.
How much PTCT stock do institutions own?
Institutional investment managers disclosed approximately $7.98B in PTCT holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was PTCT institutional ownership last updated?
The latest PTCT institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional PTCT holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its PTCT position after the reporting date.
Are institutions buying or selling PTCT?
Institutional buying and selling can be analyzed by comparing PTCT positions across consecutive 13F reporting periods. InsiderSet's PTCT Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View PTCT ownership changes.
How has PTCT institutional ownership changed over time?
InsiderSet tracks PTCT institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.