← Directory
SUNSTONE PARTNERS
Legal name: SUNSTONE PARTNERS MANAGEMENT, LLC
CRD 305064File 801-117367
APPROVED
Custody
Filing as of Jul 2, 2026
Feed vintage Oct 1, 2026
Regulatory AUM
$1.59B
Top 25% of cohort (national)
Discretionary AUM
$1.59B
Clients
8
8 accounts
Employees
39
Above cohort median in CA
Identity & registration
ADV Item 1- Organization form
- Limited Liability Company
- Firm type
- Registered
- SEC region
- SFRO
- Registration date
- Sep 20, 2019
- Principal office
- 400 S. EL CAMINO REAL, SUITE 1500, SAN MATEO, CA, 94402
- Phone
- 1-650-289-4400
Assets & accounts
ADV Item 5F- Total regulatory AUM
- $1.59B
- Discretionary AUM
- $1.59B
- Non-discretionary AUM
- $0
- Discretionary accounts
- 8
- Non-discretionary accounts
- 0
- Total accounts
- 8
- AUM per client
- $198.4M
Clients by type
ADV Item 5D| Client type | Clients | AUM |
|---|---|---|
| Pooled investment vehicles | 8 | $1.59B |
Compensation & activities
ADV Items 5E, 5GCompensation
- Performance-based fees
- A percentage of assets under your management
Advisory activities
- Portfolio management for pooled investment vehicles
Custody
ADV Item 9- Firm Custody Cash
- No
- Firm Custody Assets
- Yes
- Firm Custody Clients
- No
- Firm Custody Securities
- No
- Related Person Custody Cash
- No
- Related Person Custody Assets
- No
- Related Person Custody Clients
- No
- Related Person Custody Securities
- Yes
Disclosure events
ADV Item 11This firm answered no to every Item 11 disclosure question in this filing.
Filed changes
| Date | Field | From | To | Change |
|---|---|---|---|---|
| Apr 1, 2026 | Employees | 37 | 39 | increased by2 |
| Apr 1, 2026 | AUM | $1,988,367,621 | $1,586,963,155 | decreased by$401,404,466 |
| May 1, 2025 vs Oct 1, 2022 | Employees | 32 | 37 | increased by5 |
| May 1, 2025 vs Oct 1, 2022 | Clients | 5 | 8 | increased by3 |
| May 1, 2025 vs Oct 1, 2022 | AUM | $1,257,635,615 | $1,988,367,621 | increased by$730,732,006 |
| May 1, 2025 vs Oct 1, 2022 | Accounts | 5 | 8 | increased by3 |
| Apr 1, 2022 | Employees | 27 | 32 | increased by5 |
| Apr 1, 2022 | AUM | $923,340,249 | $1,257,635,615 | increased by$334,295,366 |
| Apr 1, 2021 | Registration | — | APPROVED |
On Form 5500, an adviser usually appears as a plan service provider (Schedule C), not the plan sponsor.
See plans that list “SUNSTONE PARTNERS” as a service provider on 5500mcp →Matched by name only — Form ADV and Form 5500 share no identifier, and names are searched loosely (“SUNSTONE PARTNERS” may also match similarly-named firms). Confirm identity against each filing.
Every value above is reproduced from this firm's Form ADV filing. Fields the firm left blank are shown as “Not reported” rather than filled in from other sources.