PTC THERAPEUTICS, INC. (PTCT) — Institutional Holders, Q2 2026

386 institutional investment managers reported a PTCT position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $8.3B. Every filer is listed below, ranked by position value, 100 per page; this page shows ranks 1 to 100. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.

← PTCT stock profile

PTCT in Q2 2026: what funds did

Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.

New positions

Added to

142

Trimmed

112

Sold out

Biggest buyers

WESTFIELD CAPITAL MANAGEMENTNew · +1,956,156 sh+$159.6M
WILLIAM BLAIR INVESTMENT MANAGEMENTNew · +1,722,688 sh+$140.5M
FULLER & THALER ASSET MANAGEMENTNew · +1,156,819 sh+$94.4M
BlackRockAdded · +1,015,837 sh+$82.9M
Blue SparrowAdded · +860,100 sh+$70.2M

Biggest sellers

UBS Group AGTrimmed · -1,102,342 sh-$89.9M
ARMISTICE CAPITALTrimmed · -1,003,054 sh-$81.8M
TORONTO DOMINION BANKTrimmed · -860,117 sh-$70.2M
Woodline PartnersSold out · -744,988 sh-$60.8M
BNP PARIBAS FINANCIAL MARKETSTrimmed · -541,756 sh-$44.2M

PTCT 13F holders ranked 1–100 of 386

Institutional investors reporting a position in PTC THERAPEUTICS, INC. on SEC Form 13F-HR for Q2 2026, ranked by reported value.
#	Institution	Shares	Value	% of portfolio	QoQShares vs Q1 2026
1	BlackRock#1 · 13,964,554 sh	13,964,554	$1.1B	0.02%	-21.4%
2	RTW INVESTMENTS#2 · 7,746,415 sh	7,746,415	$631.9M	5.39%	0.0%
3	Jupiter Topco#3 · 7,236,402 sh	7,236,402	$590.2M	0.24%	—
4	VANGUARD PORTFOLIO MANAGEMENT#4 · 4,928,111 sh	4,928,111	$402.0M	0.02%	+2.6%
5	STATE STREET#5 · 4,598,952 sh	4,598,952	$375.1M	0.01%	+5.8%
6	WELLINGTON MANAGEMENT GROUP LLP#6 · 4,128,273 sh	4,128,273	$336.7M	0.06%	+4.7%
7	VANGUARD CAPITAL MANAGEMENT#7 · 3,739,127 sh	3,739,127	$305.0M	<0.01%	+1.7%
8	GEODE CAPITAL MANAGEMENT#8 · 2,207,376 sh	2,207,376	$180.1M	<0.01%	-0.1%
9	TORONTO DOMINION BANK#9 · 2,165,846 sh	2,165,846	$176.7M	0.20%	-28.4%
10	WESTFIELD CAPITAL MANAGEMENT#10 · 1,956,156 sh	1,956,156	$159.6M	0.52%	New
11	Hood River Capital Management#11 · 1,738,613 sh	1,738,613	$141.8M	1.03%	+4.4%
12	WILLIAM BLAIR INVESTMENT MANAGEMENT#12 · 1,722,688 sh	1,722,688	$140.5M	0.42%	New
13	D. E. Shaw#13 · 1,548,919 sh	1,548,919	$126.3M	0.06%	-5.6%
14	TANG CAPITAL MANAGEMENT#14 · 1,500,000 sh	1,500,000	$122.4M	5.56%	0.0%
15	FMR#15 · 4,385,261 sh	4,385,261	$118.8M	<0.01%	-3.2%
16	BANK OF AMERICA#16 · 1,452,277 sh	1,452,277	$118.5M	<0.01%	-23.0%
17	DRIEHAUS CAPITAL MANAGEMENT#17 · 1,440,107 sh	1,440,107	$117.5M	0.68%	+41.8%
18	LEUCADIA NATIONAL#18 · 1,357,042 sh	1,357,042	$110.7M	0.73%	+0.2%
19	FULLER & THALER ASSET MANAGEMENT#19 · 1,156,819 sh	1,156,819	$94.4M	0.26%	New
20	Pictet Asset Management Holding SA#20 · 1,147,844 sh	1,147,844	$93.6M	0.09%	-3.0%
21	PRICE T ROWE ASSOCIATES#21 · 1,114,516 sh	1,114,516	$90.9M	<0.01%	+134.6%
22	MORGAN STANLEY#22 · 1,156,675 sh	1,156,675	$90.1M	<0.01%	+71.6%
23	ARMISTICE CAPITAL#23 · 1,071,395 sh	1,071,395	$87.4M	1.07%	-48.4%
24	Blue Sparrow#24 · 1,050,700 sh	1,050,700	$85.7M	0.83%	+451.3%
25	FRANKLIN RESOURCES#25 · 1,027,327 sh	1,027,327	$83.8M	0.02%	-98.3%
26	Invesco Ltd.#26 · 941,581 sh	941,581	$76.8M	<0.01%	+8.8%
27	Palo Alto Investors#27 · 918,846 sh	918,846	$75.0M	10.36%	-0.3%
28	NORTHERN#28 · 880,029 sh	880,029	$71.8M	<0.01%	+9.1%
29	CHARLES SCHWAB INVESTMENT MANAGEMENT#29 · 790,112 sh	790,112	$64.4M	<0.01%	+8.0%
30	CITADEL ADVISORS#30 · 747,822 sh	747,822	$61.0M	<0.01%	+94.1%
31	RENAISSANCE TECHNOLOGIES#31 · 723,500 sh	723,500	$59.0M	0.08%	+35.7%
32	Boston Partners#32 · 718,574 sh	718,574	$58.6M	0.05%	+11.0%
33	JUPITER ASSET MANAGEMENT LTD#33 · 707,450 sh	707,450	$57.7M	0.29%	-0.6%
34	MARSHALL WACE, LLP#34 · 704,787 sh	704,787	$57.5M	0.05%	+53.0%
35	JPMORGAN CHASE#35 · 684,042 sh	684,042	$56.1M	<0.01%	+97.7%
36	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP#36 · 654,382 sh	654,382	$53.4M	0.02%	+486.2%
37	DIMENSIONAL FUND ADVISORS#37 · 637,704 sh	637,704	$52.0M	<0.01%	-28.4%
38	GOLDMAN SACHS GROUP#38 · 618,247 sh	618,247	$50.4M	<0.01%	-25.3%
39	SG Americas Securities#39 · 605,581 sh	605,581	$49.4M	0.03%	-41.2%
40	LOOMIS SAYLES & L P#40 · 590,374 sh	590,374	$48.2M	0.06%	+19.6%
41	LORD, ABBETT#41 · 590,074 sh	590,074	$48.1M	0.14%	-87.4%
42	VANGUARD FIDUCIARY#42 · 587,887 sh	587,887	$48.0M	0.01%	+6.2%
43	Nuveen#43 · 583,829 sh	583,829	$47.6M	0.01%	-12.5%
44	Bank of New York Mellon#44 · 753,462 sh	753,462	$45.5M	<0.01%	+44.1%
45	PRINCIPAL FINANCIAL GROUP#45 · 541,635 sh	541,635	$44.2M	0.02%	+5.2%
46	VOYA INVESTMENT MANAGEMENT#46 · 539,319 sh	539,319	$44.0M	0.04%	+57.4%
47	Ensign Peak Advisors#47 · 508,056 sh	508,056	$41.4M	0.07%	-12.8%
48	AMERICAN CENTURY COMPANIES#48 · 500,995 sh	500,995	$40.9M	0.02%	+9913.9%
49	FEDERATED HERMES#49 · 483,424 sh	483,424	$39.4M	0.06%	+114.0%
50	MANUFACTURERS LIFE INSURANCE COMPANY, THE#50 · 441,957 sh	441,957	$36.1M	0.03%	+3.9%
51	Parkman Healthcare Partners#51 · 435,691 sh	435,691	$35.5M	3.64%	+1.0%
52	Defilade Capital Management, L.P.#52 · 433,699 sh	433,699	$35.4M	4.74%	+15.3%
53	Russell Investments Group, Ltd.#53 · 418,025 sh	418,025	$34.1M	0.03%	+24.6%
54	SUSQUEHANNA INTERNATIONAL GROUP, LLP#54 · 395,662 sh	395,662	$32.3M	<0.01%	+90.3%
55	BNP PARIBAS FINANCIAL MARKETS#55 · 378,720 sh	378,720	$30.9M	0.01%	-58.9%
56	Legal & General Group Plc#56 · 352,734 sh	352,734	$28.8M	<0.01%	+2.7%
57	DeepCurrents Investment Group#57 · 16,363,696 sh	16,363,696	$27.2M	0.82%	-11.1%
58	AQR CAPITAL MANAGEMENT#58 · 332,251 sh	332,251	$27.1M	<0.01%	-2.9%
59	Qube Research & Technologies Ltd#59 · 311,374 sh	311,374	$25.4M	0.02%	-39.4%
60	BNP Paribas Asset Management Holding S.A.#60 · 303,685 sh	303,685	$24.8M	0.02%	-2.6%
61	Rockefeller Capital Management L.P.#61 · 302,393 sh	302,393	$24.7M	0.04%	-21.4%
62	DEUTSCHE BANK AG\#62 · 296,899 sh	296,899	$24.2M	<0.01%	+24.4%
63	PUBLIC SECTOR PENSION INVESTMENT BOARD#63 · 285,023 sh	285,023	$23.2M	0.06%	-14.1%
64	SEGALL BRYANT & HAMILL#64 · 271,735 sh	271,735	$22.2M	0.26%	+36.6%
65	Ovata Capital Management Ltd#65 · 14,080,000 sh	14,080,000	$21.8M	1.64%	New
66	UBS Group AG#66 · 262,426 sh	262,426	$21.4M	<0.01%	-80.8%
67	CSS#67 · 12,002,000 sh	12,002,000	$18.6M	0.73%	+316.3%
68	Boxer Capital Management#68 · 200,000 sh	200,000	$16.3M	1.23%	0.0%
69	RHUMBLINE ADVISERS#69 · 192,706 sh	192,706	$15.7M	0.01%	-9.3%
70	PRUDENTIAL FINANCIAL#70 · 185,820 sh	185,820	$15.2M	0.02%	+12.9%
71	AMERIPRISE FINANCIAL#71 · 171,874 sh	171,874	$14.0M	<0.01%	+3.1%
72	CAPSTONE INVESTMENT ADVISORS#72 · 8,205,881 sh	8,205,881	$13.5M	0.01%	-73.7%
73	Rock Springs Capital Management#73 · 162,298 sh	162,298	$13.2M	0.65%	+0.3%
74	Hudson Bay Capital Management#74 · 159,778 sh	159,778	$13.0M	0.04%	+4253.6%
75	Schonfeld Strategic Advisors#75 · 147,425 sh	147,425	$12.0M	0.04%	-53.7%
76	Swiss National Bank#76 · 141,465 sh	141,465	$11.5M	<0.01%	-1.0%
77	Universal- Beteiligungs- und Servicegesellschaft mbH#77 · 135,633 sh	135,633	$11.1M	0.02%	+4.6%
78	HSBC PLC#78 · 131,389 sh	131,389	$10.8M	<0.01%	-42.1%
79	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AME#79 · 126,011 sh	126,011	$10.3M	<0.01%	-0.7%
80	SEI INVESTMENTS#80 · 125,434 sh	125,434	$10.2M	<0.01%	-3.7%
81	CITIGROUP#81 · 118,656 sh	118,656	$9.7M	<0.01%	+435.8%
82	FIRST ADVISORS#82 · 113,354 sh	113,354	$9.2M	<0.01%	-16.7%
83	Longaeva Partners L.P.#83 · 111,803 sh	111,803	$9.1M	0.20%	New
84	SCHRODER INVESTMENT MANAGEMENT GROUP#84 · 101,429 sh	101,429	$8.3M	<0.01%	-24.8%
85	SECTOR GAMMA AS#85 · 100,000 sh	100,000	$8.2M	1.77%	+33.3%
86	WCM INVESTMENT MANAGEMENT#86 · 93,799 sh	93,799	$7.7M	0.01%	-0.9%
87	PANAGORA ASSET MANAGEMENT#87 · 88,956 sh	88,956	$7.3M	0.02%	-74.7%
88	ALLIANCEBERNSTEIN L.P.#88 · 105,937 sh	105,937	$7.2M	<0.01%	-30.4%
89	BESSEMER GROUP#89 · 85,056 sh	85,056	$6.9M	<0.01%	+61.1%
90	Aquatic Capital Management#90 · 83,470 sh	83,470	$6.8M	0.23%	+318.9%
91	WELLS FARGO & COMPANY#91 · 83,071 sh	83,071	$6.8M	<0.01%	+173.9%
92	XTX Topco Ltd#92 · 81,923 sh	81,923	$6.7M	0.09%	+422.7%
93	Empowered Funds#93 · 81,271 sh	81,271	$6.6M	0.03%	+40.3%
94	MOORE CAPITAL MANAGEMENT#94 · 75,588 sh	75,588	$6.2M	0.09%	+69.1%
95	PINNACLE ASSOCIATES LTD#95 · 70,435 sh	70,435	$5.7M	—	-6.0%
96	RAYMOND JAMES FINANCIAL#96 · 69,660 sh	69,660	$5.7M	<0.01%	+32.8%
97	VANGUARD ASSET MANAGEMENT, Ltd#97 · 68,828 sh	68,828	$5.6M	<0.01%	+5.6%
98	GREAT WEST LIFE ASSURANCE#98 · 64,112 sh	64,112	$5.2M	<0.01%	-1.9%
99	Capricorn Fund Managers Ltd#99 · 63,900 sh	63,900	$5.2M	0.41%	New
100	BARCLAYS PLC#100 · 58,370 sh	58,370	$4.8M	<0.01%	+10.0%

Funds that sold out of PTCT in Q2 2026 (44)

Held PTCT at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.

Institutions that held PTCT in Q1 2026 and reported no position in Q2 2026.
Institution	Shares sold	Value in Q1 2026
Woodline Partners744,988 sh	744,988	$50.8M
DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt213,363 sh	213,363	$14.5M
BI Asset Management Fondsmaeglerselskab A/S81,878 sh	81,878	$5.6M
PICTON MAHONEY ASSET MANAGEMENT53,328 sh	53,328	$3.6M
GROUP ONE TRADING, L.P.52,713 sh	52,713	$3.6M
Illinois Municipal Retirement Fund42,421 sh	42,421	$2.9M
Private Capital Advisors38,983 sh	38,983	$2.7M
Elo Mutual Pension Insurance18,575 sh	18,575	$1.3M
DRW Securities18,169 sh	18,169	$1.2M
SIERRA SUMMIT ADVISORS11,790 sh	11,790	$803.3K
Catalyst Funds Management Pty Ltd11,200 sh	11,200	$763.1K
Ishara Investments10,250 sh	10,250	$698.3K
SIMPLEX TRADING10,180 sh	10,180	$693.6K
Marex Group plc9,334 sh	9,334	$635.9K
Edgestream Partners, L.P.8,314 sh	8,314	$566.4K
AVIVA PLC6,764 sh	6,764	$460.8K
VARCOV6,754 sh	6,754	$460.1K
Cynosure Management6,728 sh	6,728	$458.4K
EVOLVE PRIVATE WEALTH6,122 sh	6,122	$417.1K
Ares Systematic Credit Ltd6,196 sh	6,196	$406.7K
CHOREO4,767 sh	4,767	$324.8K
Dynamic Technology Lab Private Ltd3,830 sh	3,830	$260.9K
Stirlingshire Investments3,718 sh	3,718	$253.3K
Advyzon Investment Management3,533 sh	3,533	$240.7K
Abacus Wealth Partners3,340 sh	3,340	$227.6K
GTS SECURITIES3,212 sh	3,212	$218.8K
Gallacher Capital Management3,019 sh	3,019	$205.7K
Northwest & Ethical Investments L.P.2,800 sh	2,800	$192.9K
VAN ECK ASSOCIATES2,700 sh	2,700	$184.0K
QUADRANT CAPITAL GROUP550 sh	550	$67.7K
Private Wealth Asset Management200 sh	200	$13.6K
Advisory Services Network169 sh	169	$11.5K
MAI Capital Management167 sh	167	$11.4K
Root Financial Partners157 sh	157	$10.7K
Intentional Wealth Strategies135 sh	135	$9.2K
Leonteq Securities AG100 sh	100	$6.8K
Strategic Wealth Partners, Ltd.63 sh	63	$4.3K
TWIN PEAKS WEALTH ADVISORS10 sh	10	$681.00
Vermillion Wealth Management7 sh	7	$477.00
Bell Investment Advisors7 sh	7	$477.00
Frazier Financial Advisors5 sh	5	$341.00
ASSETMARK3 sh	3	$204.00
Larson Financial Group3 sh	3	$204.00
CURIO WEALTH1 sh	1	$68.00

Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.