13F Insight
DOSSIER · 13F Holders · Q1 2026Most-boughtAI cap-ex
PTCT

PTC Therapeutics Inc

371 institutions still hold PTC Therapeutics Inc as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 69366j200·371 13F holders·last filed Mar 31, 2026
Market cap
—
▲ 2.5%
vs prior quarter
13F value held
$4.6B
66.0% inst. owned
of float
Holders
371
+104 QoQ
filers reporting
Activity
+91 / −70
+859 added · −840 reduced
this quarter
Concentration
19.27%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q1 2026

371 institutions reported PTCT in Q1 2026. BlackRock, Inc. leads at 19.3% of the visible book. +104 net new institutions vs prior quarter — accumulation reading.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$882M12.9M0.02%Q1 202602
RTW INVESTMENTS, LP
CIK 0001493215
$528M7.7M5.25%Q1 202603
JANUS HENDERSON GROUP PLC
CIK 0001274173
$490M7.2M0.23%Q1 202604
Vanguard Portfolio Management
CIK 0002100121
$327M4.8M0.02%Q1 202605
STATE STREET CORP
CIK 0000093751
$296M4.3M0.01%Q1 202606
WELLINGTON MANAGEMENT GROUP LLP
CIK 0000902219
$269M3.9M0.05%Q1 202607
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$250M3.7M0.01%Q1 202608
TORONTO DOMINION BANK
CIK 0000947263
$206M3.0M0.30%Q1 202609
ARMISTICE CAPITAL, LLC
CIK 0001601086
$168M2.5M2.99%Q1 202610
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$151M2.2M0.01%Q1 202611
D. E. Shaw & Co., Inc.
CIK 0001009207
$133M1.7M0.07%Q4 202512
BANK OF AMERICA CORP /DE/
CIK 0000070858
$129M1.9M0.01%Q1 202613
Hood River Capital Management LLC
CIK 0001578177
$113M1.7M1.14%Q1 202614
FMR LLC
CIK 0000315066
$104M1.5M0.01%Q1 202615
TANG CAPITAL MANAGEMENT LLC
CIK 0001232621
$102M1.5M5.19%Q1 202616
UBS Group AG
CIK 0001610520
$93M1.4M0.01%Q1 202617
Jefferies Financial Group Inc.
CIK 0000096223
$92M1.4M0.63%Q1 202618
CITADEL ADVISORS LLC
CIK 0001423053
$89M1.2M0.01%Q4 202519
Pictet Asset Management Holding SA
CIK 0001993888
$80M1.2M0.08%Q1 202620
FRANKLIN RESOURCES INC
CIK 0000038777
$76M1.1M0.02%Q1 2026
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