AI Holders Summary · Q1 2026

20 institutions reported MBRX in Q1 2026. SABBY MANAGEMENT, LLC leads at 40.3% of the visible book.

Top holders

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

Hide index funds / market makers / custodians(4 on this page)

#HolderValueShares% port.Quarter

SABBY MANAGEMENT, LLC

CIK 0001535610

$172K75K0.38%Q1 2026 02

CITADEL ADVISORS LLC

CIK 0001423053

$110K33K0.00%Q4 2025 03

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$74K32K0.00%Q1 2026 04

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$32K14K0.00%Q1 2026 05

VANGUARD FIDUCIARY TRUST CO

CIK 0000933478· Index

$14K6K0.00%Q1 2026 06

Rockefeller Capital Management L.P.

CIK 0001739439

$10K4K0.00%Q1 2026 07

UBS Group AG

CIK 0001610520

$8K3K0.00%Q1 2026 08

Tower Research Capital LLC (TRC)

$1K4910.00%Q1 2026 10

EFG International AG

CIK 0002109868

$9944340.00%Q1 2026 11

Pinnacle Wealth Planning Services, Inc.

CIK 0001726752

$6432810.00%Q1 2026 12

Newbridge Financial Services Group, Inc.

CIK 0001879757

$2611140.00%Q1 2026 13

SBI Securities Co., Ltd.

Vanguard Global Advisers, LLC

CIK 0001811242· Index

Caitong International Asset Management Co., Ltd

CVA Family Office, LLC

CIK 0001802084

$210.00%Q1 2026