DOSSIER · 13F Holders · Q2 2026
RLYB

RALLYBIO CORP COM

37 institutions still hold RALLYBIO CORP COM as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 75120L209·37 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$60M
visible holders
Holders
37
filers reporting
Concentration
24.81%
ADAR1 Capital Management, LLC #1
top holder share
AI Holders Summary · Q2 2026

37 institutions reported RLYB in Q2 2026. ADAR1 Capital Management, LLC leads at 24.8% of the visible book.

Top holders

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

#HolderValueShares% port.Quarter
01
ADAR1 Capital Management, LLC
CIK 0001940272
$15M926K0.68%Q2 2026
02
FMR LLC
CIK 0000315066
$13M795K0.00%Q2 2026
03
Nantahala Capital Management, LLC
CIK 0001472322
$6M377K0.10%Q2 2026
04
Pivotal bioVenture Partners Investment Advisor LLC
CIK 0001844645
$5M301K1.56%Q2 2026
05
VIKING GLOBAL INVESTORS LP
CIK 0001103804
$5M524K0.01%Q1 2026
06
TPG GP A, LLC
CIK 0001903793
$3M379K0.09%Q1 2026
07
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
$3M200K0.00%Q2 2026
08
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$3M172K0.00%Q2 2026
09
Almitas Capital LLC
CIK 0001596468
$2M121K0.46%Q2 2026
10
CITADEL ADVISORS LLC
CIK 0001423053
$1M72K0.00%Q2 2026
11
AJU IB Investment Co., Ltd.
CIK 0001710065
$846K94K2.77%Q1 2026
12
Mariner, LLC
CIK 0001373442
$809K51K0.00%Q2 2026
13
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$513K32K0.00%Q2 2026
14
BlackRock, Inc.
CIK 0002012383
$485K30K0.00%Q2 2026
15
XTX Topco Ltd
CIK 0001828301
$344K21K0.00%Q2 2026
16
Rangeley Capital, LLC
CIK 0001517796
$270K30K0.26%Q1 2026
17
VANGUARD FIDUCIARY TRUST CO
CIK 0000933478· Index
$269K17K0.00%Q2 2026
18
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
$266K17K0.00%Q2 2026
19
STATE STREET CORP
CIK 0000093751
$208K13K0.00%Q2 2026
20
Quadrature Capital Ltd
CIK 0001651424
$208K13K0.00%Q2 2026
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Insiders at RALLYBIO CORP COM
Boudreau Helen MLieber Jonathan IMackay MartinChung WendyLiu HuiSoteropoulos PaulaNash Christine AHopfner Robert Lorne