Stembrook Asset Management, Llc
- Regulatory AUM
- $148M
- Discretionary
- $148M
- Clients
- 37
- Avg AUM / client
- $4.0M
- Accounts
- 153
- Employees
- 2
AUM over time
Annual snapshots from Form ADV filings · as of Mar 31, 2026
Who they serve
| Client type | Clients | AUM | % of AUM |
|---|---|---|---|
| Individuals (non-high net worth) | 9 | $3.3M | 2.24% |
| High net worth individuals | 27 | $144M | 97.6% |
| Corporations and other businesses | 1 | $178K | 0.12% |
People (2)
roster as of Jul 20, 2026| Name | Role / title | Credentials | With firm since | Ownership |
|---|---|---|---|---|
| Peter David D'agati | President/Sole Member/Owner | CFA | Mar 2006 (20y) | 75% or more |
| Thomas Christopher Kosinski | Portfolio Manager/Chief Compliance Officer | Dec 2012 (14y) | Less than 5% |
Undisclosed: 0% – 25% of the firm is not attributable from the filed Schedule A bands.
Roster from the IAPD representatives feed; ownership and acquisition dates from Form ADV Schedule A/B. "Since" is the earliest filed registration or acquisition date.
Documents (1 archived)
| Form | Period | Size | |
|---|---|---|---|
| Form ADV (full filing) | 03/31/2026 | 975 KB | View · PDF · Source ↗ |
Archived copies of the firm's regulatory filings, versioned by content hash.
Disciplinary disclosures
No disciplinary events reported on the firm's latest Form ADV filing.
How they charge
- • Percentage of assets under management
- • Fixed fees
Services
- • Financial planning services
- • Portfolio management for individuals/small businesses
- • Portfolio management for businesses/institutional clients
- • Selection of other advisers
- • Other services
Custody
Reported custodians
- Charles Schwab & Co. $145M (98% of AUM) Mar 2026
- Coinbase Custody $45.3K (0% of AUM) Mar 2026
Amounts as reported in ADV Item 5.K.(3) (custodians holding 10%+ of SMA assets).
Firm reports it does not have custody of client funds or securities (Item 9.A).
Source
All data on this page comes from this firm's Form ADV filings, reproduced without modification. Latest filing: Mar 31, 2026.
View current Form ADV (SEC/IAPD) ↗