AdFi
SP

Sunstone Partners

SEC Registered

A partner for growth

San Mateo, CAhttps://sunstonepartners.com1-650-289-4400
Assets Under Management
$1B–$5B
Year Founded
2015
Employees
39
Office Locations
1 office
Total Accounts
8

About the firm

Sunstone Partners is a growth-oriented private equity firm that invests in AI- and technology-enabled services and software companies. Founded in 2015, the firm has $1.7 billion of committed capital under its first three funds and seeks to partner with exceptional entrepreneurs, often as their first institutional capital partner, to help accelerate organic growth and fund acquisitions. The firm has over 70 years of collective experience investing and helping technology companies achieve successful outcomes.

Firm Focus

Client segments reported on the firm's SEC Form ADV — applies to all advisors at the firm.

Pooled Vehicles

Areas of expertise

Private EquityGrowth EquityTechnology-enabled ServicesSoftwareAI-enabled ServicesMajority InvestmentsMinority InvestmentsFounder-friendlyGrowth AccelerationAcquisitions

Services

Majority and minority investments in technology-enabled services and software businesses, with check sizes of $75M–$200M, focused on accelerating organic growth, funding acquisitions, providing strategic guidance, and execution of operational best practices.

Private funds / alternatives
Private Equity

Who they serve

Exceptional entrepreneurs, often as their first institutional capital partner, leading technology-enabled services and software businesses with $20M+ of revenue, 20%+ growth, and a capital efficient history.

Client segmentClientsAssets managed
Pension/Profit Sharing Plans8$1.6B

Leadership

John Hutchins Moragne
MANAGING DIRECTOR
Arneek Arun Multani
MANAGING DIRECTOR
Michael Lawrence Biggee
MANAGING DIRECTOR
Gustavo M Alberelli
MANAGING DIRECTOR
Howard Sheldon Zeprun
GENERAL COUNSEL AND CHIEF COMPLIANCE OFFICER
Jennifer Lynn Gunn
CHIEF FINANCIAL OFFICER
Lp Sunstone Partners Management Holdings
MEMBER
Arneek Arun Multani
LP
Michael Lawrence Biggee
LP
Gustavo M Alberelli
LP
Llc Sunstone Partners Gp-I
GENERAL PARTNER

Office locations

1 office in 1 state
CA
San MateoHQ

Regulatory & compliance

CRD number
#305064
SEC Number
801-117367
Disciplinary History
No
Fee Model & Minimums
Model: AUM / Performance-based
Asset tierAnnual rate
Investment Period (pre-Stepdown)2.00%
Post-Stepdown (steps down incrementally)1.00%

Data as of March 19, 2026 · Source: SEC IAPD & FINRA BrokerCheck

Contact Information

Editorial disclosure

This profile was compiled and published by AdvisorFinder as editorial content using publicly available information from the SEC's IAPD database and FINRA BrokerCheck. Sunstone Partners has not reviewed, approved, or endorsed this profile and is not responsible for its accuracy. Regulatory records change over time — always verify the current record directly on the SEC or FINRA websites before making any decision.

BrokerCheck data is used subject to the FINRA BrokerCheck Terms of Use. Found something inaccurate? Report inaccurate data and we will correct any error we introduced. Errors in the underlying BrokerCheck record itself are referred to FINRA, which maintains that record.

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