AI Holders Summary · Q1 2026

22 institutions reported MSTX in Q1 2026. SUSQUEHANNA INTERNATIONAL GROUP, LLP leads at 85.4% 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

SUSQUEHANNA INTERNATIONAL GROUP, LLP

CIK 0001446194· Market maker

$50M2.6M0.01%Q1 2026 02

JANE STREET GROUP, LLC

CIK 0001595888· Market maker

$3M147K0.00%Q1 2026 03

StoneX Group Inc.

CIK 0000913760

$909K46K0.05%Q1 2026 04

GOLDMAN SACHS GROUP INC

CIK 0000886982

$782K40K0.00%Q1 2026 05

FLOW TRADERS U.S. LLC

CIK 0001466697· Market maker

$779K40K0.02%Q1 2026 06

RENAISSANCE TECHNOLOGIES LLC

CIK 0001037389

$547K28K0.00%Q1 2026 07

GROUP ONE TRADING LLC

CIK 0000932540

$491K25K0.00%Q1 2026 08

Mariner, LLC

CIK 0001373442

$423K22K0.00%Q1 2026 09

Optiver Holding B.V.

CIK 0001859606· Market maker

$412K21K0.00%Q1 2026 10

Genesis Financial Group, LLC

CIK 0002097587

$391K20K0.25%Q1 2026 11

Jump Financial, LLC

CIK 0001831577

$333K17K0.00%Q1 2026 12

FOUNDATIONS INVESTMENT ADVISORS, LLC

CIK 0001743404

$293K15K0.00%Q1 2026 13

HighTower Advisors, LLC

CIK 0001462245

$221K11K0.00%Q1 2026 14

MORGAN STANLEY

CIK 0000895421

$58K3K0.00%Q1 2026 15

Parallel Advisors, LLC

CIK 0001690010

$43K2K0.00%Q1 2026 16

Philadelphia Investment Partners, LLC

CIK 0002131511

$14K7050.01%Q1 2026 17

UBS Group AG

CIK 0001610520

$6K3240.00%Q1 2026 18

MassMutual Private Wealth & Trust, FSB

CIK 0001103653

$1K1530.00%Q2 2026 19

EverSource Wealth Advisors, LLC

CIK 0001710537

$9671300.00%Q2 2026 20

Clearstead Advisors, LLC

CIK 0000842775

$607310.00%Q1 2026

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