AI Holders Summary · Q1 2026

255 institutions reported MDXG in Q1 2026. Essex Woodlands Management, Inc. leads at 31.6% 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

Essex Woodlands Management, Inc.

CIK 0001542339

$111M28.2M44.45%Q1 2026 02

BlackRock, Inc.

CIK 0002012383

$47M11.9M0.00%Q1 2026 03

Trigran Investments, Inc.

CIK 0001336800

$28M7.2M6.78%Q1 2026 04

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$20M5.2M0.00%Q1 2026 05

STATE STREET CORP

CIK 0000093751

$20M5.1M0.00%Q1 2026 06

PARADIGM CAPITAL MANAGEMENT INC/NY

CIK 0001037792

$13M3.4M0.52%Q1 2026 07

Nantahala Capital Management, LLC

CIK 0001472322

$13M3.4M0.49%Q1 2026 08

RENAISSANCE TECHNOLOGIES LLC

CIK 0001037389

$12M3.0M0.02%Q1 2026 09

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$11M2.9M0.00%Q1 2026 10

First Light Asset Management, LLC

CIK 0001600004

$11M2.8M1.01%Q1 2026 11

DIMENSIONAL FUND ADVISORS LP

CIK 0000354204· Quasi-passive

$11M2.7M0.00%Q1 2026 12

MARSHALL WACE, LLP

CIK 0001318757

$9M1.4M0.01%Q4 2025 13

PUNCH & ASSOCIATES INVESTMENT MANAGEMENT, INC.

CIK 0001238990

$8M2.0M0.46%Q1 2026 14

Qube Research & Technologies Ltd

CIK 0001729829

$7M1.7M0.01%Q1 2026 15

CANNELL CAPITAL LLC

CIK 0001058854

$6M1.5M3.63%Q1 2026 16

CHARLES SCHWAB INVESTMENT MANAGEMENT INC

CIK 0000884546· Index

$5M1.4M0.00%Q1 2026 17

GOLDMAN SACHS GROUP INC

CIK 0000886982

$5M1.2M0.00%Q1 2026 18

Vanguard Portfolio Management

CIK 0002100121· Index

$4M1.1M0.00%Q1 2026 19

Meros Investment Management, LP

CIK 0001911372

$4M1.1M1.87%Q1 2026 20

DEUTSCHE BANK AG\

CIK 0000948046

$4M1.0M0.00%Q1 2026

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