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

ATYR PHARMA INC

117 institutions still hold ATYR PHARMA INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 002120202·117 13F holders·last filed Mar 31, 2026
Market cap
—
▲ 9.2%
vs prior quarter
13F value held
$42M
67.0% inst. owned
of float
Holders
117
-40 QoQ
filers reporting
Activity
+38 / −28
+1,027 added · −796 reduced
this quarter
Concentration
27.46%
FMR LLC #1
top holder share
AI Holders Summary · Q1 2026

117 institutions reported ATYR in Q1 2026. FMR LLC leads at 27.5% of the visible book. -40 net institutions QoQ — distribution reading.

Top holders

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

#HolderValueShares% port.Quarter
01
FMR LLC
CIK 0000315066
$11M14.7M0.00%Q1 202602
FEDERATED HERMES, INC.
CIK 0001056288
$8M10.5M0.01%Q1 202603
BlackRock, Inc.
CIK 0002012383
$5M6.4M0.00%Q1 202604
UBS Group AG
CIK 0001610520
$3M3.9M0.00%Q1 202605
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$3M3.8M0.00%Q1 202606
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$2M2.4M0.00%Q1 202607
STATE STREET CORP
CIK 0000093751
$1M1.8M0.00%Q1 202608
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
$1M1.6M0.00%Q1 202609
MORGAN STANLEY
CIK 0000895421
$955,8651.2M0.00%Q1 202610
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
$892,7611.1M0.00%Q1 202611
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 0001446194· Market maker
$883,2281.1M0.00%Q1 202612
TWO SIGMA ADVISERS, LP
CIK 0001478735
$658,861841K0.00%Q4 202513
NORTHERN TRUST CORP
CIK 0000073124· Index
$554,663711K0.00%Q1 202614
VANGUARD FIDUCIARY TRUST CO
CIK 0000933478· Index
$508,429652K0.00%Q1 202615
Vanguard Portfolio Management
CIK 0002100121· Index
$443,997569K0.00%Q1 202616
JANE STREET GROUP, LLC
CIK 0001595888· Market maker
$391,094501K0.00%Q1 202617
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
$386,894496K0.00%Q1 202618
WOLVERINE TRADING, LLC
CIK 0000927337
$315,000398K0.00%Q3 202519
CITADEL ADVISORS LLC
CIK 0001423053
$298,361381K0.00%Q4 202520
AVANTAX ADVISORY SERVICES, INC.
CIK 0001303042
$292,38258K0.00%Q2 2025
Page 1 of 6
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