Four Tree Island Advisory provides portfolio management for individuals and small businesses and portfolio management for institutions.
Four Tree Island Advisory reports 54 clients. They include 35 high-net-worth individuals, 18 individual clients and 1 pooled investment vehicle. Of its assets, 100.0% ($182M across 136 accounts) are managed with discretion.
| Client type | Clients | Assets |
|---|---|---|
| Individuals (other than HNW) | 33% | 6% |
| High-net-worth individuals | 65% | 90% |
| Pooled investment vehicles | 2% | 1% |
| Insurance companies | Fewer than 5 | 4% |
Client shares use reported counts. Client types without a reported count are excluded from that total.
Client breakdown and activity details
| Client type | Clients | Regulatory AUM | AUM share | Avg. per client |
|---|---|---|---|---|
| Individuals (other than HNW) | 18 | $10M | 5.5% | $558K |
| High-net-worth individuals | 35 | $163M | 89.7% | $4.67M |
| Pooled investment vehicles | 1 | $1.87M | 1.0% | $1.87M |
| Insurance companies | Fewer than 5 | $6.92M | 3.8% | — |
| Total | 54 | $182M | 100% | — |
- Clients
- 18
- Regulatory AUM
- $10M
- AUM share
- 5.5%
- Avg. per client
- $558K
- Clients
- 35
- Regulatory AUM
- $163M
- AUM share
- 89.7%
- Avg. per client
- $4.67M
- Clients
- 1
- Regulatory AUM
- $1.87M
- AUM share
- 1.0%
- Avg. per client
- $1.87M
- Clients
- Fewer than 5
- Regulatory AUM
- $6.92M
- AUM share
- 3.8%
- Avg. per client
- —
Total
- Clients
- 54
- Regulatory AUM
- $182M
- AUM share
- 100%
- Avg. per client
- —
- Clients outside the U.S.
- 0%
- Clients advised without assets under management last fiscal year
- 0
- Private funds advised
- 0
Four Tree Island Advisory is paid through a percentage of assets under management. The reviewed brochures do not disclose an asset-based fee rate. Read the SEC-filed brochure.
Eric Gregg owns 75% or more of Four Tree Island Advisory. The leadership team of Four Tree Island Advisory includes Chief Compliance Officer Jennifer Philbrick. It has 2 employees, 1 of them in advisory roles.
Leadership
- Jennifer PhilbrickChief Compliance Officer
- Eric GreggOwner/Principal
Investment adviser representatives
1 representatives listed in the SEC register as of 9 October 2026.
Staff
- 2 employees
- 1 in advisory functions
- 1 state-registered rep
- Owns 75% or more of Four Tree Island Advisory LLC
Eric Gregg
Control person · since September 2010
Four Tree Island Advisory’s regulatory assets grew from $123M (March 2024) to $182M (March 2026); clients rose from 48 to 54 and employees were 2 in both filings.
Figures from each annual filing
| Filed | Regulatory AUM | Clients | Employees | Offices |
|---|---|---|---|---|
| March 2026 | $182M | 54 | 2 | 1 |
| March 2025 | $163M | 57 | 2 | 1 |
| March 2024 | $123M | 48 | 2 | 1 |
Besides its headquarters, Four Tree Island Advisory has 0 offices, with 1 listed address in New Hampshire.
New Hampshire · 1 listed address
- 126 Daniel Street, Suite 120, PortsmouthHQ
Contact and registration details
- Legal name
- Four Tree Island Advisory LLC
- Headquarters
- 126 Daniel Street, Suite 120, Portsmouth, NH 03801
- Website
- fourtreeislandadvisory.com
- Phone
- 603-427-8053
- SEC file
- 801-129929
- Structure
- New Hampshire LLC
- Fiscal year end
- December
Four Tree Island Advisory uses Interactive Brokers ($165M) as custodian for its separately managed accounts. Four Tree Island Advisory does not have custody of client assets.
- Interactive BrokersInteractive Brokers LLC · Greenwich, CT · $165M100%
At year end, Four Tree Island Advisory’s separately managed accounts were mostly in stocks (91%). Its reported 13F holdings for the quarter ended 30 June 2026 total $303M across 24 positions; the largest are Lam Research Corp. (32.6%), Applied Matls Inc. (12.9%) and Mueller Inds Inc. (9.5%).
What the accounts hold
- Stocks91%
- Bonds1%
- Cash1%
- Other7%
- Derivatives7%
Reported 13F holdings
- $303M
- Reported 13F value
- 24
- Positions
- 93.2%
- In the 10 largest
- +53.0%
- Value vs. prior quarter
- Lam Research Corp.32.6%
- Applied Matls Inc.12.9%
- Mueller Inds Inc.9.5%
- Willis Lease Fin Corp.8.2%
- Jackson Financial Inc. · Com CL A8.0%
- Garrett Motion Inc.6.7%
- Aercap Holdings NV6.2%
- Equitable Hldgs Inc.5.5%
- Alliancebernstein Hldg L P · Unit Ltd Partn2.4%
- Brighthouse Finl Inc.1.2%
Together, the ten largest are 93.2% of reported value.
How many clients does Four Tree Island Advisory have?
Four Tree Island Advisory has 54 clients and manages $182 million for them, as of March 2026. They include 35 high-net-worth individuals, 18 individual clients and 1 pooled investment vehicle.
Source: Form ADV Part 1A, Items 5.D and 5.F, filed 2 March 2026
What services does Four Tree Island Advisory offer?
Four Tree Island Advisory provides portfolio management for individuals and small businesses and portfolio management for institutions.
Source: Form ADV Part 1A, Item 5.G, from the SEC's 2 October 2026 data file
Which custodians does Four Tree Island Advisory use?
Four Tree Island Advisory’s separately managed account assets are held at Interactive Brokers LLC (Greenwich, CT), with $165M. Only custodians holding at least a tenth of those assets are named.
Source: Form ADV Part 1A, Schedule D, Section 5.K.(3), filed 2 March 2026
How many financial advisors does Four Tree Island Advisory have?
Four Tree Island Advisory has 1 investment adviser representative registered with state securities authorities, out of 2 employees, and 1 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 Four Tree Island Advisory invest in?
At the end of its last fiscal year, Four Tree Island Advisory’s separately managed accounts held 91% exchange-traded equities, 7% derivatives, 1% U.S. government and agency bonds and 1% cash and equivalents.
Source: Form ADV Part 1A, Items 5.K.(1) and 7.B, from the SEC's 2 October 2026 data file
Who owns Four Tree Island Advisory?
Four Tree Island Advisory’s direct owner is Eric Gregg (75% or more).
Source: Form ADV Part 1A, Schedules A and B, filed 2 March 2026
How does Four Tree Island Advisory get paid?
Four Tree Island Advisory is paid through a percentage of assets under management. 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
Is Four Tree Island Advisory registered with the SEC?
Yes, Four Tree Island Advisory has been registered with the SEC as an investment adviser since 18 April 2024. Its CRD number is 158851 and its SEC file number is 801-129929.
Source: Form ADV Part 1A, Item 1, filed 2 March 2026; IAPD firm record
How do I contact Four Tree Island Advisory?
Four Tree Island Advisory’s main office is at 126 Daniel Street, Suite 120, Portsmouth, NH 03801. Its phone number is 603-427-8053. Its website is fourtreeislandadvisory.com.