Stembrook Asset Management provides financial planning, portfolio management for individuals and small businesses, portfolio management for institutions, and selecting other managers. Financial planning was provided to 26–50 clients last fiscal year.
Stembrook Asset Management reports 37 clients. They include 27 high-net-worth individuals, 9 individual clients and 1 corporate or other business client. Of its assets, 100.0% ($148M across 153 accounts) are managed with discretion. It advised 4 clients without assets under management last fiscal year.
| Client type | Clients | Assets |
|---|---|---|
| Individuals (other than HNW) | 24% | 2% |
| High-net-worth individuals | 73% | 98% |
| Corporations and other businesses | 3% | <1% |
Client breakdown and activity details
| Client type | Clients | Regulatory AUM | AUM share | Avg. per client |
|---|---|---|---|---|
| Individuals (other than HNW) | 9 | $3.3M | 2.2% | $367K |
| High-net-worth individuals | 27 | $144M | 97.6% | $5.33M |
| Corporations and other businesses | Fewer than 5 | $178K | 0.1% | $178K |
| Total | 37 | $148M | 100% | — |
- Clients
- 9
- Regulatory AUM
- $3.3M
- AUM share
- 2.2%
- Avg. per client
- $367K
- Clients
- 27
- Regulatory AUM
- $144M
- AUM share
- 97.6%
- Avg. per client
- $5.33M
- Clients
- Fewer than 5
- Regulatory AUM
- $178K
- AUM share
- 0.1%
- Avg. per client
- $178K
Total
- Clients
- 37
- Regulatory AUM
- $148M
- AUM share
- 100%
- Avg. per client
- —
- Clients outside the U.S.
- 0%
- Clients advised without assets under management last fiscal year
- 4
- Private funds advised
- 0
- Financial planning clients last fiscal year
- 26–50
Stembrook Asset Management is paid through a percentage of assets under management and fixed fees (other than subscription fees). The reviewed brochures do not disclose an asset-based fee rate. Read the SEC-filed brochure. The brochure also prices one other service, listed under fee details.
Fee details and sources
Other fees
- Financial planning and consulting
- Fixed fee generally between $5,000 and $20,000, negotiable depending on the complexity and scope of the plan.
Peter D'Agati owns 75% or more of Stembrook Asset Management. The leadership team of Stembrook Asset Management includes President Peter D'Agati and Chief Compliance Officer Thomas Kosinski. It has 2 employees.
Leadership
Peter D'AgatiPresident/Sole Member/Owner
Thomas KosinskiPortfolio Manager/Chief Compliance Officer
Investment adviser representatives
2 representatives listed in the SEC register as of 9 October 2026.
Staff
- 2 employees
- 2 in advisory functions
- 2 state-registered reps
- Owns 75% or more of Stembrook Asset Management, LLC
Peter D'Agati
Control person · since March 2006
Stembrook Asset Management’s regulatory assets grew from $128M (March 2025) to $148M (March 2026); clients fell from 39 to 37 and employees were 2 in both filings.
Figures from each annual filing
| Filed | Regulatory AUM | Clients | Employees | Offices |
|---|---|---|---|---|
| March 2026 | $148M | 37 | 2 | 4 |
| March 2025 | $128M | 39 | 2 | 4 |
Besides its headquarters, Stembrook Asset Management has 3 offices (2 private residences, listed without an address), with 2 listed addresses in New Jersey and New York.
New Jersey · 1 listed address
- 212 Maple Avenue, Suite 201, Red BankHQ
New York · 1 listed address
- 405 Lexington Ave, New York
Contact and registration details
- Legal name
- Stembrook Asset Management, LLC
- Headquarters
- 212 Maple Avenue, Suite 201, Red Bank, NJ 07701
- Website
- stembrook.com
- Phone
- 201-484-0063
- @stembrook-asset-management
- SEC file
- 801-131731
- Structure
- New Jersey LLC
- Fiscal year end
- December
Stembrook Asset Management uses Charles Schwab ($145M, 100%) and Coinbase Custody Trust ($45.3K, 0%) as custodians for its separately managed accounts. Stembrook Asset Management does not have custody of client assets.
- Charles SchwabCharles Schwab & Co., Inc. · Westlake, TX · $145M100%
- Coinbase Custody TrustCoinbase Custody Trust Company, LLC · New York, NY · $45.3K0%
At year end, Stembrook Asset Management’s separately managed accounts were mostly in funds (59%) and stocks (40%). Its reported 13F holdings for the quarter ended 30 June 2026 total $116M across 51 positions; the largest are Apple Inc. (34.9%), State Str SPDR S&P 500 ETF T (16.7%) and Vanguard Tax-managed Fds (8.7%).
What the accounts hold
- Stocks40%
- Funds59%
- Bonds1%
Reported 13F holdings
- $116M
- Reported 13F value
- 51
- Positions
- 83.6%
- In the 10 largest
- —
- Value vs. prior quarter
- Apple Inc.34.9%
- State Str SPDR S&P 500 ETF T · TR Unit16.7%
- Vanguard Tax-managed Fds · Van FTSE Dev Mkt8.7%
- Vanguard BD Index Fds · Total Bnd Mrkt7.4%
- Vanguard Mun BD Fds · Tax Exempt BD6.0%
- Vanguard Index Fds · Extend Mkt ETF3.0%
- Invesco Qqq TR · Unit Ser 12.3%
- Alphabet Inc. · Cap Stk CL A1.8%
- Baillie Gifford ETF TR · Lng Trm Glbl Grw1.5%
- Vanguard Index Fds · SM CP Val ETF1.3%
Together, the ten largest are 83.6% of reported value.
How many clients does Stembrook Asset Management have?
Stembrook Asset Management has 37 clients and manages $148 million for them, as of March 2026. They include 27 high-net-worth individuals, 9 individual clients and 1 corporate or other business client.
Source: Form ADV Part 1A, Items 5.D and 5.F, filed 31 March 2026
What services does Stembrook Asset Management offer?
Stembrook Asset Management provides financial planning, portfolio management for individuals and small businesses, portfolio management for institutions, and selecting other managers.
Source: Form ADV Part 1A, Item 5.G, from the SEC's 2 October 2026 data file
Which custodians does Stembrook Asset Management use?
Stembrook Asset Management’s separately managed account assets are held at Charles Schwab & Co., Inc. (Westlake, TX), with $145M and Coinbase Custody Trust Company, LLC (New York, NY), with $45.3K. Only custodians holding at least a tenth of those assets are named.
Source: Form ADV Part 1A, Schedule D, Section 5.K.(3), filed 31 March 2026
How many financial advisors does Stembrook Asset Management have?
Stembrook Asset Management has 2 investment adviser representatives registered with state securities authorities, out of 2 employees, and 2 perform investment advisory functions. None are registered representatives of a broker-dealer or licensed insurance agents.
Source: Form ADV Part 1A, Items 5.A and 5.B, from the SEC's 2 October 2026 data file
What does Stembrook Asset Management invest in?
At the end of its last fiscal year, Stembrook Asset Management’s separately managed accounts held 59% registered funds (mutual funds, ETFs, BDCs), 40% exchange-traded equities and 1% investment grade corporate bonds.
Source: Form ADV Part 1A, Items 5.K.(1) and 7.B, from the SEC's 2 October 2026 data file
Who owns Stembrook Asset Management?
Stembrook Asset Management’s direct owner is Peter D'Agati (75% or more).
Source: Form ADV Part 1A, Schedules A and B, filed 31 March 2026
How does Stembrook Asset Management get paid?
Stembrook Asset Management is paid through a percentage of assets under management and fixed fees. Its Form ADV lists no commissions or performance-based fees among how it is paid.
Source: Form ADV Part 1A, Item 5.E, from the SEC's 2 October 2026 data file
How do I contact Stembrook Asset Management?
Stembrook Asset Management’s main office is at 212 Maple Avenue, Suite 201, Red Bank, NJ 07701. Its phone number is 201-484-0063. Its website is stembrook.com.