AI Holders Summary · Q1 2026

118 institutions reported ABEO in Q1 2026. Nantahala Capital Management, LLC leads at 18.0% of the visible book.

Top holders

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

Hide index funds / market makers / custodians(3 on this page)

#HolderValueShares% port.Quarter

Nantahala Capital Management, LLC

CIK 0001472322

$27M6.0M0.99%Q1 2026 02

BlackRock, Inc.

CIK 0002012383

$14M3.2M0.00%Q1 2026 03

AIGH Capital Management LLC

CIK 0001835943

$14M3.1M1.89%Q1 2026 04

Cable Car Capital, LP

CIK 0001699575

$13M3.0M4.65%Q1 2026 05

SUVRETTA CAPITAL MANAGEMENT, LLC

CIK 0001569064

$12M2.7M0.31%Q1 2026 06

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$10M2.2M0.00%Q1 2026 07

Propel Bio Management, LLC

CIK 0001969764

$6M1.3M3.79%Q1 2026 08

NAN FUNG TRINITY (HK) Ltd

CIK 0001781880

$6M957K0.58%Q2 2026 09

KENNEDY CAPITAL MANAGEMENT LLC

CIK 0000884589

$6M1.3M0.12%Q1 2026 10

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$5M1.2M0.00%Q1 2026 11

GOLDMAN SACHS GROUP INC

CIK 0000886982

$5M1.1M0.00%Q1 2026 12

SUSQUEHANNA INTERNATIONAL GROUP, LLP

CIK 0001446194· Market maker

$5M1.1M0.00%Q1 2026 13

STATE STREET CORP

CIK 0000093751

$4M957K0.00%Q1 2026 14

683 Capital Management, LLC

CIK 0001404574

$4M770K0.18%Q4 2025 15

Stonepine Capital Management, LLC

CIK 0001440771

$4M847K1.52%Q1 2026 16

AWM Investment Company, Inc.

CIK 0001535264

$4M803K0.40%Q1 2026 17

SILVERARC CAPITAL MANAGEMENT, LLC

CIK 0001816307

$3M649K0.30%Q1 2026 18

J. Goldman & Co LP

CIK 0001412741

$3M641K0.08%Q1 2026 19

Diametric Capital, LP

CIK 0001719087

$3M612K0.71%Q1 2026 20

BALYASNY ASSET MANAGEMENT L.P.

CIK 0001218710

$3M590K0.00%Q1 2026

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