13F Insight
DOSSIER · 13F Holders · Q1 2026Mega-capCrowded
RNTX

AILERON THERAPEUTICS INC

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

CUSIP 00887a204·50 13F holders·last filed Mar 31, 2026
Market cap
—
▲ 4.1%
vs prior quarter
13F value held
$14M
72.0% inst. owned
of float
Holders
50
+55 QoQ
filers reporting
Activity
+86 / −13
+874 added · −923 reduced
this quarter
Concentration
39.50%
Voss Capital, LP #1
top holder share
AI Holders Summary · Q1 2026

50 institutions reported RNTX in Q1 2026. Voss Capital, LP leads at 39.5% of the visible book. +55 net new institutions vs prior quarter — accumulation reading.

Top holders

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

#HolderValueShares% port.Quarter
01
Voss Capital, LP
CIK 0001730145
$6M4.4M0.30%Q1 202602
BIOS Capital Management, LP
CIK 0001813845
$3M2.0M4.87%Q1 202603
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$1M999K0.00%Q1 202604
UNIVERSITY OF TEXAS/TEXAS AM INVESTMENT MANAGEMENT CO
CIK 0001019231
$665,093512K0.10%Q1 202605
Cable Car Capital, LP
CIK 0001699575
$546,000420K0.19%Q1 202606
Prosight Management, LP
CIK 0001617201
$535,080412K0.09%Q1 202607
Sigma Planning Corp
CIK 0001449126
$453,280349K0.01%Q1 202608
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$448,185345K0.00%Q1 202609
Texas Capital Bank Wealth Management Services Inc
CIK 0001802655
$355,712274K0.02%Q1 202610
GAGNON SECURITIES LLC
CIK 0001125725
$311,376240K0.07%Q1 202611
Senvest Management, LLC
CIK 0001328785
$300,164231K0.01%Q1 202612
Palogic Value Management, L.P.
CIK 0001532943
$234,000180K0.10%Q1 202613
VANGUARD FIDUCIARY TRUST CO
CIK 0000933478· Index
$200,866155K0.00%Q1 202614
ABS Direct Equity Fund LLC
CIK 0001729347
$162,500125K0.12%Q1 202615
Rock Creek Group, LP
CIK 0001484067
$162,500125K0.02%Q1 202616
CITADEL ADVISORS LLC
CIK 0001423053
$139,296120K0.00%Q4 202517
STATE STREET CORP
CIK 0000093751
$98,67576K0.00%Q1 202618
BlackRock, Inc.
CIK 0002012383
$89,08769K0.00%Q1 202619
NORTHERN TRUST CORP
CIK 0000073124· Index
$83,37764K0.00%Q1 202620
Chicago Partners Investment Group LLC
CIK 0001563525
$77,17041K0.00%Q1 2026
Page 1 of 3
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