Stonebrook Capital Management, LLC (New York)


Stonebrook Capital Management, LLC is a large advisory firm based in New York. It manages $67.9 million of regulatory assets for 13 client accounts. It has been registered with the SEC as an adviser since 2008.




Stonebrook Capital Management provides portfolio management for individuals and small businesses and portfolio management for pooled investment vehicles. It doesn't provide financial planning services to its clients. On top of advisory services, the firm doesn't engage in other business activities.

Stonebrook Capital Management: assets under management

The assets under management (AUM) of Stonebrook Capital Management, LLC is $67.9 million. The firm's AUM has gone down by -22% since the beginning of its operation, and the company doesn't manage any assets belonging to foreign clients.


The firm manages $17.9 million in discretionary accounts and $50 million in non-discretionary accounts. On average, the discretionary accounts where all decisions are made on behalf of the client hold $1.49 million each. Non-discretionary accounts, where clients actively manage their portfolios, generally hold around $50 million.

Fees & Commissions

The advisory firm has several streams of revenue. Clients pay Stonebrook Capital Management, LLC for their services and products based on a percentage of assets under management, fixed fees, and performance-based fees. Compensation based on assets under management promotes a long-term relationship between a client and the adviser and helps align mutual interests. These fees don’t include brokerage commissions, interest, taxes, and other account expenses.

Careers at Stonebrook Capital Management, LLC

Darryl Thompson has been acting as President since 1 Mar 2007. George Howard Zettler joined the executive team most recently as the Cio.

Direct owners and executive officers



Name Entity Date acquired Ownership Employer ID
Jerome Drew Abernathy President, managing member 1 Jul 1993 75% - 100% 1850204
Lynn Arden Palmer Principal 1 May 1999 Other 4872067
Darryl Thompson President 1 Mar 2007 Other 2098649
Llc Stonebrook Holdings Member 1 Mar 2007 50% - 75% 20-8710462
Llc Sasco Holdings Member 1 Mar 2007 25% - 50% 20-0957483
Ahmad Ajakh Director of research 1 Aug 2007 Other 4771966
Mark Donald Inglis Chief compliance officer 1 Oct 2007 Other 4872061
Mark Donald Inglis Chief compliance officer 1 Feb 2009 Other 4872061
Inc Stonebrook Captial Ii Master (Stonebrook) Member 1 Feb 2009 Other 26-4188837
Matthew Aaron Grayson Managing director 1 Nov 2009 Other 2804238
Mathias Alexis Mamou Mani Vice president 1 Nov 2009 Other 5764963
George Howard Zettler Cio 1 Jan 2010 Other 2399039

Indirect Owners

The SEC currently registers 4 indirect owners.

Name Entity Date acquired Ownership Employer ID
Eleanor C Beer Member 1 Mar 2007 25% - 50% 4927379
Jerome Drew Abernathy Member 1 Mar 2007 50% - 75% 1850204
Skybridge Capital Master Lp Shareholder 1 Feb 2009 75% - 100% 26-2626365
Llc Skybridge Capital Ii (Delaware Gp) General partner 1 Feb 2009 Other 26-2625244

Based in New York

The principal office where Stonebrook Capital Management, LLC performs its advisory services is located at One Bryant Park, New York, NY 10036, which is also the mailing address of the firm. It doesn’t run an office outside of the United States.

You can reach the main office by calling the phone number 212-952-0500 or by fax 212-952-0522. The normal business hours are 8:00 am to 5:00 pm on Monday - Friday.