AI Holders Summary · Q1 2026

155 institutions reported OSUR in Q1 2026. BlackRock, Inc. leads at 14.6% 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

BlackRock, Inc.

CIK 0002012383

$20M6.5M0.00%Q1 2026 02

PRIVATE MANAGEMENT GROUP INC

CIK 0001142031

$16M5.4M0.47%Q1 2026 03

Neuberger Berman Group LLC

CIK 0001465109

$13M4.4M0.01%Q1 2026 04

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$9M3.0M0.00%Q1 2026 05

DIMENSIONAL FUND ADVISORS LP

CIK 0000354204· Quasi-passive

$8M2.8M0.00%Q1 2026 06

SYSTEMATIC FINANCIAL MANAGEMENT LP

CIK 0001085936

$7M2.5M0.17%Q1 2026 07

RENAISSANCE TECHNOLOGIES LLC

CIK 0001037389

$6M2.1M0.01%Q1 2026 08

ACADIAN ASSET MANAGEMENT LLC

CIK 0000916542

$6M2.0M0.01%Q1 2026 09

CANNELL CAPITAL LLC

CIK 0001058854

$6M2.0M3.69%Q1 2026 10

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$5M1.8M0.00%Q1 2026 11

GAGNON SECURITIES LLC

CIK 0001125725

$5M1.7M1.19%Q1 2026 12

STATE STREET CORP

CIK 0000093751

$5M1.7M0.00%Q1 2026 13

KOTLER KEVIN

CIK 0001601692

$4M1.8M1.02%Q4 2025 14

D. E. Shaw & Co., Inc.

CIK 0001009207

$4M1.7M0.00%Q4 2025 15

Gagnon Advisors, LLC

CIK 0001599466

$4M1.2M2.66%Q1 2026 16

Peapod Lane Capital LLC

CIK 0002050979

$3M1.0M2.49%Q1 2026 17

JACOBS LEVY EQUITY MANAGEMENT, INC

CIK 0000884414

$3M1000K0.01%Q1 2026 18

Camber Capital Management LP

CIK 0001444043

$3M900K0.25%Q2 2025 19

WELLS FARGO & COMPANY/MN

CIK 0000072971

$3M900K0.00%Q1 2026 20

Archon Capital Management LLC

CIK 0001398825

$2M748K1.27%Q1 2026

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