Private fund adviser · Aventura, FL
Harbor Ithaka
Harbor Ithaka WM, LLC · SEC-registered investment adviser · CRD 170580 · SEC 801-113143
At a glance
Harbor Ithaka is an SEC-registered investment adviser based in Aventura, Florida, with $171 million in regulatory assets under management as of its Form ADV filed March 31, 2026. Its largest client group by assets is pooled investment vehicles, and it reports 33 individual clients. By Form ADV it is a private fund adviser, ranked 4,188th of 4,686 private fund advisers and 13,054th of 17,210 SEC-registered advisers by assets.
Main office 305-755-7600harbor-ithaka.comLinkedInAs filed on Form ADV
- Regulatory AUM
- $171M
- Rank among private fund advisers
- #4,188 of 4,686
- Rank among all SEC RIAs
- #13,054 of 17,210
- Rank in Florida
- #808 of 1,090
- Individual clients
- 33
- High-net-worth clients
- 33
- Accounts
- 70
- Discretionary
- 80% of AUM
- Employees
- 7
- Advisory staff
- 3
- Offices
- 1
Owners and executives on its Form ADV
- Rafael A. Alcantara-LansbergManaging Director & CCO
Custody and brokerage
Who it serves
| Client type | Clients | Regulatory AUM | Share |
|---|---|---|---|
| Pooled investment vehicles | 10 | $107M | 63% |
| High-net-worth individuals | 33 | $64M | 37% |
Private funds
Harbor Ithaka reports 10 private funds with $107M in gross assets: real estate funds, other private funds (Form ADV Item 7.B).
Disciplinary disclosures
Harbor Ithaka reports no disciplinary disclosures in Item 11 of Form ADV. Read the details on the SEC’s adviser search ↗
Services
- Portfolio management for individuals and small businesses
- Portfolio management for pooled investment vehicles
- Selecting other advisers
How it’s paid
- A percentage of assets under management
- Fixed fees
Form ADV and brochures on the SEC’s adviser search ↗harbor-ithaka.com ↗
AtlasMembers
The full record on Harbor Ithaka
Ten years of SEC filings, its owners and contacts, and how it stacks up against its peers. Atlas members see all of it.
- Assets, accounts, clients and staff, 8 years of filings
- Locked
- Growth over one, three and five years
- Locked
- Rank against 1,560 peers of its type and size
- Locked
- Owners and executives, with titles and stakes
- 1 namedLocked
- Main office, fax and compliance officer
- Locked
- Filing changes this year, with alerts
- Locked
Free while Atlas launches: create a free account and confirm your email. Every figure comes from SEC filings.
Background
Questions
How much does Harbor Ithaka manage?
Harbor Ithaka reports $171 million in regulatory assets under management across 70 accounts, 80% of it on a discretionary basis, on its Form ADV filed March 31, 2026.
What kind of firm is Harbor Ithaka?
Harbor Ithaka is a private fund adviser by its Form ADV answers. Private funds are at least half of its business by assets.
Who are Harbor Ithaka’s clients?
By assets, its largest client types are pooled investment vehicles ($107 million, 10 clients); high-net-worth individuals ($64 million, 33 clients).
Does Harbor Ithaka manage private funds?
Yes. It reports 10 private funds with $107 million in gross assets, including real estate funds, other private funds.
Does Harbor Ithaka have any disciplinary history?
Harbor Ithaka reports no disciplinary disclosures in Item 11 of its Form ADV. Check the SEC’s adviser search for the latest record.
Where these numbers come from
Every figure is Harbor Ithaka’s own answer on its latest Form ADV, from the SEC’s registered-adviser list as of October 1, 2026: regulatory assets and accounts (Item 5.F), clients by type (5.D), employees (5.A and 5.B), compensation (5.E) and services (5.G). Custodians come from Schedule D 5.K(3) of its latest filing (2026-03-31), which lists those holding 10% or more of separately managed account assets and the amount at each. “Hybrid” means some employees are also registered representatives of a broker-dealer (Item 5.B(2)); affiliated broker-dealers are the related persons it lists in Item 7.A and Schedule D. Firm type comes from its own answers: broker-dealer firms are registered broker-dealers themselves (Item 6.A); private fund advisers manage mostly private funds (Item 7.B, 5.D); wealth managers manage at least half their assets for individuals (5.D). Ranks compare it by regulatory assets with every SEC-registered adviser and with firms of its type. Figures are as of the firm’s last annual update, so they can lag recent deals and market moves. Regulatory AUM counts assets the firm continuously supervises and can differ from what a firm markets.
Not an endorsement or a recommendation. Before hiring any adviser, read its Form ADV Part 2A brochure and check its record on the SEC’s adviser search. How to check a financial advisor →