AI Holders Summary · Q2 2026

104 institutions reported ZLAB in Q2 2026. RTW INVESTMENTS, LP leads at 16.6% of the visible book.

Top holders

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

Hide index funds / market makers / custodians(1 on this page)

#HolderValueShares% port.Quarter

RTW INVESTMENTS, LP

CIK 0001493215

$125M6.6M1.07%Q2 2026 02

TCG Crossover Management, LLC

CIK 0001839948

$117M6.1M2.80%Q2 2026 03

RA CAPITAL MANAGEMENT, L.P.

CIK 0001346824

$109M5.7M0.95%Q2 2026 04

ADAR1 Capital Management, LLC

CIK 0001940272

$64M3.4M2.93%Q2 2026 05

FMR LLC

CIK 0000315066

$53M2.8M0.00%Q2 2026 06

GOLDMAN SACHS GROUP INC

CIK 0000886982

$44M2.3M0.00%Q2 2026 07

Woodline Partners LP

CIK 0001784547

$42M2.2M0.13%Q2 2026 08

Frazier Life Sciences Management, L.P.

CIK 0001892134

$36M1.9M0.79%Q2 2026 09

BAMCO INC /NY/

CIK 0001017918

$31M1.6M0.05%Q2 2026 10

CITADEL ADVISORS LLC

CIK 0001423053

$25M1.3M0.00%Q2 2026 11

TWO SIGMA INVESTMENTS, LP

CIK 0001179392

$25M1.3M0.02%Q2 2026 12

Rock Springs Capital Management LP

CIK 0001595725

$15M815K0.76%Q2 2026 13

BlackRock, Inc.

CIK 0002012383

$13M664K0.00%Q2 2026 14

C WorldWide Group Holding A/S

CIK 0001625244

$10M510K0.21%Q1 2026 15

JANE STREET GROUP, LLC

CIK 0001595888· Market maker

$9M467K0.00%Q1 2026 16

B Group, Inc.

CIK 0002043476

$9M451K4.02%Q2 2026 17

Nantahala Capital Management, LLC

CIK 0001472322

$8M400K0.13%Q2 2026 18

SCHRODER INVESTMENT MANAGEMENT GROUP

CIK 0001086619

$7M393K0.01%Q2 2026 19

NAN FUNG TRINITY (HK) Ltd

CIK 0001781880

$7M346K0.65%Q2 2026 20

Aberdeen Group plc

CIK 0001716774

$6M311K0.01%Q2 2026

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