AI Holders Summary · Q1 2026

322 institutions reported RARE in Q1 2026. BlackRock, Inc. leads at 12.1% 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

$153M7.3M0.00%Q1 2026 02

Vanguard Portfolio Management

CIK 0002100121· Index

$113M5.4M0.01%Q1 2026 03

STATE STREET CORP

CIK 0000093751

$105M5.0M0.00%Q1 2026 04

AQR CAPITAL MANAGEMENT LLC

CIK 0001167557

$96M4.6M0.04%Q1 2026 05

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$88M4.2M0.00%Q1 2026 06

RTW INVESTMENTS, LP

CIK 0001493215

$76M3.6M0.76%Q1 2026 07

Sofinnova Investments, Inc.

CIK 0001631134

$73M3.5M2.78%Q1 2026 08

SANDS CAPITAL MANAGEMENT, LLC

CIK 0001020066

$67M3.2M0.26%Q1 2026 09

BAKER BROS. ADVISORS LP

CIK 0001263508

$64M2.8M0.37%Q4 2025 10

CITADEL ADVISORS LLC

CIK 0001423053

$61M2.7M0.01%Q4 2025 11

WELLINGTON MANAGEMENT GROUP LLP

CIK 0000902219

$55M2.6M0.01%Q1 2026 12

TWO SIGMA INVESTMENTS, LP

CIK 0001179392

$46M2.2M0.04%Q1 2026 13

FRONTIER CAPITAL MANAGEMENT CO LLC

CIK 0000351173

$46M2.2M0.47%Q1 2026 14

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$39M1.8M0.00%Q1 2026 15

MILLENNIUM MANAGEMENT LLC

CIK 0001273087

$37M1.8M0.02%Q1 2026 16

GW&K Investment Management, LLC

CIK 0001082917

$34M1.6M0.30%Q1 2026 17

MORGAN STANLEY

CIK 0000895421

$31M1.5M0.00%Q1 2026 18

JACOBS LEVY EQUITY MANAGEMENT, INC

CIK 0000884414

$30M1.4M0.13%Q1 2026 19

Rock Springs Capital Management LP

CIK 0001595725

$26M1.2M1.50%Q1 2026 20

Jones Hill Capital LP

CIK 0002102314

$24M1.2M5.23%Q1 2026

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