United States · Investor

Sunstone Partners

Filed with the SEC to raise a fund in Oct 2026. Last cheque observed Oct 2017.

QuietNew fund, Oct 2026Private equity

SeedSeries ASeries BCybersecurity And TechnologyDigital MediaTourism

Cheques on record
0%of best year0cheques in 12 months, 1 on record
Since the last cheque3282days00hrs00min00sec
Median round$20MRounds led0 of 1Sole investor1 rounds
Pitch Sunstone Partners

Sunstone Partners highlights

  1. 01

    1 rounds on record

  2. 02

    Sole investor in 1 rounds, median $20M

What they do

Type
Private equity (from a list, unverified)
Cheque size
Not stated
Stages
SeedSeries ASeries BGrowth
Sectors
Cybersecurity And TechnologyDigital MediaTourism
Based in
San Mateo, United States
Cold pitches
Not stated

The record

Every round we can evidence, newest first1 appearances

  1. 2017

    1 round

  2. Oct
    OnicaUS · FinSMEs$20MSole investor

An announcement gives the size of the round, not the size of this investor's cheque: the only rounds that imply a cheque are those where they were the sole named investor.

The team

Named by the firm itself, on a filing, its Form ADV or its company registration5 named

AAArneek Arun MultaniCo-Founder and Managing PartneriForm ADV
GMGustavo M AlberelliCo-Founder and Managing PartneriForm ADV
HSHoward Sheldon ZeprunGeneral Counsel and Chief Compliance OfficeriForm ADV
MLMichael Lawrence BiggeeCo-Founder and Managing PartneriForm ADV
NINestor Ivan OlmoChief Financial OfficeriForm ADV

We also hold 14 people at this firm from the lists this database was built from: a weaker source than the filings, since a list does not say when a title ended. Login to see them.

What the register says

From the firm's own filings with the SEC, which it must file accurately by law

$1.6Bassets it managesOct 2026
Registeredinvestment adviserfull reporting to the SEC
Legal name
Sunstone Partners Management, LLC
SEC number
CRD 305064

Funds on its Form ADV

8 private funds, $1.3B in gross assets · filed Apr 2024

  1. Sunstone Partners I, L.P.Private equity28 investors$493M
  2. Sunstone Partners II, L.P.Private equity30 investors$488M
  3. Sunstone Partners II-A, L.P.Private equity10 investors$181M
  4. Sunstone Partners III-MAIN, L.P.Private equity38 investors$66M
  5. Sunstone Partners III-A, L.P.Private equity14 investors$23M
  6. Sunstone Partners Executive Fund II, L.P.Private equity13 investors$9.4M
  7. Sunstone Partners Co-Invest I, L.P.Private equity4 investors$5.4M
  8. Sunstone Partners Executive Fund III, L.P.Private equity28 investors$2.2M

Quick answers about Sunstone Partners

What does Sunstone Partners invest in?

Sunstone Partners says it invests in Cybersecurity And Technology, Digital Media and Tourism.

How active is Sunstone Partners?

1 investments on record, 0 of them in the last 12 months. The most recent was in Oct 2017.

What has Sunstone Partners invested in recently?

Its most recent investments on record: Onica (Undisclosed round, Oct 2017).

How big are Sunstone Partners's cheques?

The median round it joins is $20M.

Is Sunstone Partners investing now?

No investments in the last 12 months; the latest was in Oct 2017.

What kind of investor is Sunstone Partners?

Sunstone Partners is a private equity firm based in San Mateo, United States.

How much does Sunstone Partners manage?

About $1.6B, as regulatory assets under management (Oct 2026).

Has Sunstone Partners raised a new fund?

Its latest fund filing with the SEC was in Oct 2026.

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Built from the rounds we watched, its filings and its own website, refreshed every night. How we count · Report a correction · Is this your firm? Claim it