AI Holders Summary · Q1 2026

86 institutions reported MNPR in Q1 2026. JANUS HENDERSON GROUP PLC leads at 25.1% of the visible book.

Top holders

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

Hide index funds / market makers / custodians(2 on this page)

#HolderValueShares% port.Quarter

JANUS HENDERSON GROUP PLC

CIK 0001274173

$72M1.3M0.03%Q1 2026 02

RA CAPITAL MANAGEMENT, L.P.

CIK 0001346824

$37M667K0.39%Q1 2026 03

Saturn V Capital Management LP

CIK 0001964437

$19M346K3.43%Q1 2026 04

BlackRock, Inc.

CIK 0002012383

$17M317K0.00%Q1 2026 05

ADAGE CAPITAL PARTNERS GP, L.L.C.

CIK 0001165408

$17M309K0.03%Q1 2026 06

Siren, L.L.C.

CIK 0002005245

$15M270K0.41%Q1 2026 07

ADAR1 Capital Management, LLC

CIK 0001940272

$14M264K0.85%Q1 2026 08

Polar Capital Holdings Plc

CIK 0001837309

$12M227K0.04%Q1 2026 09

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$12M218K0.00%Q1 2026 10

DEERFIELD MANAGEMENT COMPANY, L.P.

CIK 0001009258

$11M171K0.14%Q4 2025 11

WELLINGTON MANAGEMENT GROUP LLP

CIK 0000902219

$10M174K0.00%Q1 2026 12

Sio Capital Management, LLC

CIK 0001482416

$10M174K1.36%Q1 2026 13

BALYASNY ASSET MANAGEMENT L.P.

CIK 0001218710

$7M136K0.01%Q1 2026 14

TCG Crossover Management, LLC

CIK 0001839948

$7M132K0.21%Q1 2026 15

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$5M100K0.00%Q1 2026 16

Vivo Capital, LLC

CIK 0001674712

$5M91K0.41%Q1 2026 17

STATE STREET CORP

CIK 0000093751

$5M88K0.00%Q1 2026 18

Bank of New York Mellon Corp

CIK 0001390777

$4M79K0.00%Q1 2026 19

Vestal Point Capital, LP

CIK 0001974915

$4M65K0.10%Q1 2026 20

Walleye Capital LLC

CIK 0001758720

$3M63K0.01%Q1 2026

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