Private fund adviser · New York, NY
Mariner Investment Group, LLC
SEC-registered investment adviser · CRD 124744 · SEC 801-62016
At a glance
Mariner Investment Group, LLC is an SEC-registered investment adviser based in New York, New York, with $176.3 billion in regulatory assets under management as of its Form ADV filed August 28, 2026. Its largest client group by assets is pooled investment vehicles. By Form ADV it is a private fund adviser, ranked 39th of 4,686 private fund advisers and 153rd of 17,210 SEC-registered advisers by assets.
Main office 914-670-4300marinerinvestment.comLinkedInAs filed on Form ADV
- Regulatory AUM
- $176B
- Rank among private fund advisers
- #39 of 4,686
- Rank among all SEC RIAs
- #153 of 17,210
- Rank in New York
- #29 of 2,591
- Clients
- 36
- Accounts
- 39
- Discretionary
- 100% of AUM
- Employees
- 176
- Advisory staff
- 89
- Offices
- 7
Owners and executives on its Form ADV
- Charles R. HowePresident & Chief Financial Officer
- Peter J. O'RourkeGeneral Counsel
- John KeltyChief Legal Officer
- Curtis Y. ArledgeChairman & Chief Executive Officer
- Russell A. ThompsonChief Compliance Officer & Deputy General Counsel
- Patrick E BeirneChief Operating Officer
Custody and brokerage
Broker-dealer
Hybrid RIA
Mariner Investment Group, LLC is a hybrid RIA: 10 of its employees are also registered representatives of a broker-dealer.
Form ADV Part 1 doesn’t name an unaffiliated broker-dealer. The firm’s Part 2A brochure (Item 10) and each adviser’s record on the SEC’s adviser search do.
Who it serves
| Client type | Clients | Regulatory AUM | Share |
|---|---|---|---|
| Pooled investment vehicles | 34 | $127B | 72% |
| Sovereign wealth funds and foreign official institutions | – | $42B | 24% |
| Investment companies | 2 | $4.4B | 2% |
| Pension and profit sharing plans | – | $2.8B | 2% |
Private funds
Mariner Investment Group, LLC reports 17 private funds with $123B in gross assets: hedge funds, other private funds (Form ADV Item 7.B).
Disciplinary disclosures
Mariner Investment Group, LLC reports no disciplinary disclosures in Item 11 of Form ADV. Read the details on the SEC’s adviser search ↗
Services
- Portfolio management for investment companies
- Portfolio management for pooled investment vehicles
- Portfolio management for businesses and institutions
How it’s paid
- A percentage of assets under management
- Performance-based fees
Form ADV and brochures on the SEC’s adviser search ↗marinerinvestment.com ↗Mariner Investment Group, LLC news and profile →
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The full record on Mariner Investment Group, LLC
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, ten years of filings
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- Growth over one, three and five years
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- Rank against 134 peers of its type and size
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- Owners and executives, with titles and stakes
- 6 namedLocked
- Main office, fax and compliance officer
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- Filing changes this year, with alerts
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Free while Atlas launches: create a free account and confirm your email. Every figure comes from SEC filings.
Background
Questions
How much does Mariner Investment Group, LLC manage?
Mariner Investment Group, LLC reports $176.3 billion in regulatory assets under management across 39 accounts, 100% of it on a discretionary basis, on its Form ADV filed August 28, 2026.
What kind of firm is Mariner Investment Group, LLC?
Mariner Investment Group, LLC is a private fund adviser by its Form ADV answers. Private funds are at least half of its business by assets.
Who are Mariner Investment Group, LLC’s clients?
By assets, its largest client types are pooled investment vehicles ($127.2 billion, 34 clients); sovereign wealth funds and foreign official institutions ($41.9 billion); investment companies ($4.4 billion, 2 clients).
Does Mariner Investment Group, LLC manage private funds?
Yes. It reports 17 private funds with $123.5 billion in gross assets, including hedge funds, other private funds.
Does Mariner Investment Group, LLC have any disciplinary history?
Mariner Investment Group, LLC 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 Mariner Investment Group, LLC’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 (2026-08-28), 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 →