AI Holders Summary · Q2 2026

83 institutions reported OBIO in Q2 2026. RTW INVESTMENTS, LP leads at 36.4% of the visible book.

Top holders

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

Hide index funds / market makers / custodians(6 on this page)

#HolderValueShares% port.Quarter

RTW INVESTMENTS, LP

CIK 0001493215

$41M9.6M0.35%Q2 2026 02

PERCEPTIVE ADVISORS LLC

CIK 0001224962

$21M5.0M0.42%Q1 2026 03

BlackRock, Inc.

CIK 0002012383

$11M2.5M0.00%Q2 2026 04

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$9M2.0M0.00%Q2 2026 05

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$4M1.0M0.00%Q2 2026 06

Alyeska Investment Group, L.P.

CIK 0001453072

$4M1.0M0.01%Q2 2026 07

Propel Bio Management, LLC

CIK 0001969764

$4M897K2.02%Q2 2026 08

UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC

CIK 0000861177

$3M642K0.00%Q2 2026 09

STATE STREET CORP

CIK 0000093751

$2M516K0.00%Q2 2026 10

RICE HALL JAMES & ASSOCIATES, LLC

CIK 0001230765

$2M424K0.09%Q2 2026 11

CHARLES SCHWAB INVESTMENT MANAGEMENT INC

CIK 0000884546· Index

$2M350K0.00%Q2 2026 12

NORTHERN TRUST CORP

CIK 0000073124· Index

$1M344K0.00%Q2 2026 13

UBS Group AG

CIK 0001610520

$1M326K0.00%Q2 2026 14

VANGUARD FIDUCIARY TRUST CO

CIK 0000933478· Index

$1M292K0.00%Q2 2026 15

Vanguard Portfolio Management

CIK 0002100121· Index

$1M275K0.00%Q2 2026 16

Knott David M Jr

CIK 0001892770

$1M254K0.58%Q2 2026 17

Flat Footed LLC

CIK 0001799456

$1M251K0.08%Q2 2026 18

Simplify Asset Management Inc.

CIK 0001846368

$947K219K0.01%Q2 2026 19

683 Capital Management, LLC

CIK 0001404574

$847K204K0.04%Q4 2025 20

GOLDMAN SACHS GROUP INC

CIK 0000886982

$775K180K0.00%Q2 2026

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