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PTC Therapeutics, Inc.

PTCT
Exchange
Nasdaq
Industry
Pharmaceutical Preparations
SEC CIK
0001070081

In the last 90 days, PTC Therapeutics, Inc. insiders filed 0 open-market purchases and 11 sales; 382 institutions reported holding it in 13F filings for Q2 2026, worth $8.20B in total; no superinvestor holds it.

Holders of 5% or more of PTCT

Holders whose latest Schedule 13D or 13G filing reports 5% or more of PTC Therapeutics, Inc., largest stake first. The change is against the holder's previous filing.

Holders of 5% or more of PTCT
HolderLatest formStakeChangeFirst filedLatest filingFiling
BlackRock, Inc.13G/A14.80%11.9M shares+6.80 ppfrom 8.00%Apr 17, 20252 filingsDec 4, 2025SEC
Janus Henderson Group PLC13G/A8.70%7.19M shares+2.70 ppfrom 6.00%Feb 17, 20262 filingsMay 15, 2026SEC
Vanguard Portfolio Management LLC13G5.88%4.87M sharesNewApr 29, 20261 filingApr 29, 2026SEC
State Street Corp13G5.20%4.21M sharesNewFeb 9, 20261 filingFeb 9, 2026SEC
Vanguard Capital Management LLC13G5.17%4.28M sharesNewApr 30, 20261 filingApr 30, 2026SEC

Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.

13D and 13G filings

27 Schedule 13D and 13G filings on PTC Therapeutics, Inc., newest first, including old-format filings without a stake.

Schedule 13D and 13G filings on PTCT
Filed (ET)FilerFormStakeChangeEvent dateFiling
May 15, 20261:46 PM ETToronto Dominion Bank13G/A3.70%3.03M shares−1.50 ppfrom 5.20%Below 5%Mar 31, 2026SEC
May 15, 202612:39 PM ETJanus Henderson Group PLC13G/A8.70%7.19M shares+2.70 ppfrom 6.00%Mar 31, 2026SEC
Apr 30, 202612:08 PM ETVanguard Capital Management LLC13G5.17%4.28M sharesNewMar 31, 2026SEC
Apr 29, 20262:49 PM ETVanguard Portfolio Management LLC13G5.88%4.87M sharesNewMar 31, 2026SEC
Mar 27, 202611:34 AM ETVanguard Group Inc13G/A0.00%0 shares−10.43 ppfrom 10.43%Below 5%Mar 13, 2026SEC
Feb 17, 202612:42 PM ETJanus Henderson Group PLC13G6.00%4.85M sharesNewDec 31, 2025SEC
Feb 13, 20261:02 PM ETToronto Dominion Bank13G5.20%4.14M sharesNewDec 31, 2025SEC
Feb 10, 202611:21 AM ETWellington Management Group LLPand 2 others13G/A4.80%3.87M shares−1.40 ppfrom 6.20%Below 5%Dec 31, 2025SEC
Feb 9, 20267:59 AM ETState Street Corp13G5.20%4.21M sharesNewDec 31, 2025SEC
Dec 4, 20252:24 PM ETBlackRock, Inc.13G/A14.80%11.9M shares+6.80 ppfrom 8.00%Nov 30, 2025SEC
Nov 14, 20256:20 PM ETArmistice Capital, LLCand 1 other13G/A4.08%3.28M shares−1.88 ppfrom 5.96%Below 5%Sep 30, 2025SEC
Oct 30, 20253:49 PM ETVanguard Group Inc13G/A10.43%8.29M shares–Sep 30, 2025SEC
Aug 14, 20259:42 PM ETArmistice Capital, LLCand 1 other13G/A5.96%4.74M shares−0.90 ppfrom 6.86%Jun 30, 2025SEC
May 15, 20253:46 PM ETArmistice Capital, LLCand 1 other13G/A6.86%5.43M shares−1.41 ppfrom 8.27%Mar 31, 2025SEC
Apr 17, 20259:35 AM ETBlackRock, Inc.13G/A8.00%6.27M shares–Mar 31, 2025SEC
Feb 14, 20255:18 PM ETArmistice Capital, LLCand 1 other13G/A8.27%6.38M shares–Dec 31, 2024SEC
Feb 14, 20258:35 AM ETCamber Capital Management LPand 1 other13G/A4.15%3.20M shares–Below 5%Dec 31, 2024SEC
Feb 10, 202510:25 AM ETWellington Management Group LLPand 3 others13G/A6.20%4.79M shares–Dec 31, 2024SEC
Feb 26, 2021RTW Investments, LP13G/AOld format–––SEC
Feb 16, 2021Price T Rowe Associates Inc13G/AOld format–––SEC
Feb 12, 2021RTW Investments, LP13G/AOld format–––SEC
Feb 10, 2021Vanguard Group Inc13G/AOld format–––SEC
Feb 9, 2021Hartford Mutual Funds Inc13GOld format–New–SEC
Feb 8, 2021FMR LLC13G/AOld format–––SEC
Feb 4, 2021Wellington Management Group LLP13G/AOld format–––SEC
Feb 2, 2021Franklin Resources Inc13G/AOld format–––SEC
Jan 29, 20215:22 PM ETBlackRock Inc.13G/AOld format–––SEC

Form 144: proposed insider sales

Notices from officers, directors and other affiliates planning to sell PTC Therapeutics, Inc. shares.

No Form 144 notices for PTC Therapeutics, Inc. are on file.