AI Holders Summary · Q1 2026

113 institutions reported MGNX in Q1 2026. ARMISTICE CAPITAL, LLC leads at 17.1% of the visible book.

Top holders

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

Hide index funds / market makers / custodians(5 on this page)

#HolderValueShares% port.Quarter

ARMISTICE CAPITAL, LLC

CIK 0001601086

$17M6.0M0.31%Q1 2026 02

WASATCH ADVISORS LP

CIK 0000814133

$9M2.0M0.06%Q2 2026 03

RENAISSANCE TECHNOLOGIES LLC

CIK 0001037389

$9M3.0M0.01%Q1 2026 04

MILLENNIUM MANAGEMENT LLC

CIK 0001273087

$8M2.8M0.00%Q1 2026 05

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$8M2.7M0.00%Q1 2026 06

ACADIAN ASSET MANAGEMENT LLC

CIK 0000916542

$7M2.5M0.01%Q1 2026 07

TWO SIGMA INVESTMENTS, LP

CIK 0001179392

$7M2.5M0.01%Q1 2026 08

BANK OF AMERICA CORP /DE/

CIK 0000070858

$7M2.4M0.00%Q1 2026 09

RA CAPITAL MANAGEMENT, L.P.

CIK 0001346824

$5M1.9M0.06%Q1 2026 10

Vanguard Portfolio Management

CIK 0002100121· Index

$3M1.2M0.00%Q1 2026 11

BlackRock, Inc.

CIK 0002012383

$3M1.2M0.00%Q1 2026 12

Connor, Clark & Lunn Investment Management Ltd.

CIK 0001596800

$3M867K0.01%Q1 2026 13

MARSHALL WACE, LLP

CIK 0001318757

$2M1.3M0.00%Q4 2025 14

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$2M697K0.00%Q1 2026 15

TWO SIGMA ADVISERS, LP

CIK 0001478735

$2M1.2M0.00%Q4 2025 16

CITADEL ADVISORS LLC

CIK 0001423053

$2M1.1M0.00%Q4 2025 17

JANE STREET GROUP, LLC

CIK 0001595888· Market maker

$2M609K0.00%Q1 2026 18

DIADEMA PARTNERS LP

CIK 0002026172

$2M600K0.29%Q1 2026 19

MACKENZIE FINANCIAL CORP

CIK 0000919859

$2M597K0.00%Q1 2026 20

SUSQUEHANNA INTERNATIONAL GROUP, LLP

CIK 0001446194· Market maker

$1M513K0.00%Q1 2026

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