Mission Pure Alpha Master LP

Mission Pure Alpha Master LP is reported as a hedge fund in Form ADV private-fund disclosures. The adviser is Monashee Investment Management, LLC, based in Boston, Massachusetts, United States.

General hedge fund $100M to $500M $1M to $5M minimum

$139.2Mgross assets

$1.0Mminimum

3owners

3(c)(7)exemption

Disclosure fields

Fund facts

SEC private fund ID805-3505298272

Reference ID438083

JurisdictionCayman Islands

Fund of fundsNo

Master fundYes

Feeder fundNo

Non-US ownership87%

Assets valued100%

Annual auditYes

GAAPYes

Source periodFebruary 2026

Date submitted02/27/2026 10:11:48 AM

Adviser

Monashee Investment Management, LLC

TypeRegistered investment adviser

SEC number801-79936

CRD163148

Regulatory AUM$1.9B

Compliance signals

Exempt from registration Sales limited Prime brokers reported Custodians reported

Service providers

Reported counterparties

General partners

Monashee Capital Gp LLC

Auditors

DELOITTE & TOUCHE LLP

Prime brokers

MORGAN STANLEY & CO. LLCGOLDMAN SACHS & CO. LLC

Custodians

MORGAN STANLEY & CO. LLCGOLDMAN SACHS & CO. LLCTHE NORTHERN TRUST INTERNATIONAL BANKING CORPORATION

Administrators

APEX FUND AND CUSTODY SERVICES LLC