AdvisorCensus / Financial advisors / California / San Francisco / Sunstone Partners
Sunstone Partners
Filed as SUNSTONE PARTNERS · Legal name Sunstone Partners Management, LLC
Sunstone Partners is an SEC-registered investment advisory firm in San Mateo, CA, registered since 2019, reporting $1 billion to $5 billion in regulatory assets under management in its Form ADV filing dated July 2, 2026.
Quick answers
From the filingHow is Sunstone Partners compensated?
On its Form ADV (Item 5.E, October 2026), Sunstone Partners reports these compensation arrangements: a percentage of assets under its management; performance-based fees.
Where is Sunstone Partners located?
Sunstone Partners' principal office is in San Mateo, CA, according to its Form ADV.
Is Sunstone Partners registered with the SEC or a state?
Sunstone Partners is an SEC-registered investment advisory firm, registered since 2019. Status as filed: Approved. CRD 305064.
How much does Sunstone Partners manage?
Sunstone Partners reports $1,586,963,155 in regulatory assets under management in its Form ADV filing dated July 2, 2026 (100% discretionary).
How have Sunstone Partners' assets and staff changed since 2021?
In the Form ADV data for Sunstone Partners: Regulatory assets under management: $923,340,249 in the October 2021 data and $1,586,963,155 in the October 2026 data, up 72%. Total employees: 27 in October 2021 and 39 in October 2026. Assets under management move with markets as well as with clients coming and going.
What types of clients does Sunstone Partners serve?
By number of clients on Form ADV Item 5.D: pooled investment vehicles (other than investment companies and business development companies) (8).
Does Sunstone Partners report any disciplinary disclosures?
Reports no disclosure items on Form ADV Item 11. The detail of any item is on the firm's SEC record: https://adviserinfo.sec.gov/firm/summary/305064
What changed in Sunstone Partners' recent Form ADV filings?
In the April 2026 filing data: Regulatory assets under management went from $1,988,367,621 to $1,586,963,155 (-20%).
From the Form ADV filing
Every figure below is as the firm filed it with regulators, as of October 2026.
How the firm is compensated
Item 5.E- A percentage of assets under your management
- Performance-based fees
Item 5.E lists how the firm is compensated for its advice; Items 5.B, 6.A, and 7.A show whether its people or related companies can also earn commissions. Percentage of assets, fixed, hourly, subscription, and performance-based fees come from clients (a performance-based fee depends on investment results); commissions come with a sale or a trade, often from the company behind the product. How fees, commissions, and other arrangements differ
Fees and minimums
Form ADV Part 2ASee the firm's brochure (dated March 19, 2026) for its fees and any account minimum, on the SEC's IAPD site.
Regulatory assets under management
Item 5.F$1,586,963,155 as of October 2026, filing dated July 2, 2026.
A measure of scale, not skill or returns. Discretionary means the firm decides trades; non-discretionary means clients approve each one. What assets under management means
Who the firm serves
Item 5.DA firm with no individual clients is an institutional manager even if it manages billions; the mix tells you whom the practice is built around.
Advisory services
Item 5.G- Portfolio management for pooled investment vehicles (other than investment companies)
Registration and firm details
Items 1, 2, 5- Legal name
- Sunstone Partners Management, LLC
- Registration
- SEC-registered investment adviser. Status as filed: Approved.
- Registered since
- 2019 (7 years)
- Employees
- Total: 39. Performing investment advisory functions: 24.
- Wrap fee program participation
- No.
- States registered or notice-filed
-
1 state or jurisdiction
SEC-registered investment advisers are examined by the SEC. SEC, state, and exempt registration
Disclosures
Item 11None Reports no disclosure items on Form ADV Item 11. View on IAPD.
Item 11 asks about criminal, regulatory, and civil events involving the firm and its advisory personnel. The detail of each yes answer is on the IAPD record. Reading a firm's disclosures
Assets and staff over time
Items 5.A, 5.F| Data period | Assets under management | Employees | Filing dated |
|---|---|---|---|
| October 2026 | $1,586,963,155 | 39 | July 2, 2026 |
| October 2025 | $1,988,367,621 | 37 | March 28, 2025 |
| October 2024 | $2,155,315,048 | 37 | April 30, 2024 |
| October 2023 | $2,109,620,176 | 38 | April 12, 2023 |
| October 2022 | $1,257,635,615 | 32 | March 29, 2022 |
| October 2021 | $923,340,249 | 27 | July 20, 2021 |
Regulatory assets under management: $923,340,249 in the October 2021 data and $1,586,963,155 in the October 2026 data, up 72%.
Total employees: 27 in October 2021 and 39 in October 2026.
As filed in each year's data for the same month. Assets under management move with markets as well as with clients coming and going; they measure scale, not skill or returns. Most firms update these figures once a year.
Changes in the filing
Last 12 months- April 2026
- Regulatory assets under management went from $1,988,367,621 to $1,586,963,155 (-20%).
Compared month to month from the SEC's monthly adviser data and the state compilation feed. Owners and control persons are summarized, never named.
Websites listed on Form ADV
Item 1.ISource: Form ADV, as of October 2026. Values appear as filed; a value the firm did not report is shown as "Not reported."
Cite this page
AdvisorCensus. Sunstone Partners (CRD 305064): Form ADV filing data as of October 2026. https://advisorcensus.com/firm/sunstone-partners-san-mateo-ca-305064