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Private company

Black Diamond Capital Management I, LLLP

Last updated Oct 21, 2026.

Overview

  • HeadquartersVI1

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Corporate structure

Black Diamond Capital Management I, LLLP sits at the top of its group. 3 entities, 1 country on record. Switch between the flow chart and the network, and select any entity to see its details.

Major holders of Black Diamond Capital Management I, LLLP

  • Stephen Henry Deckoff Owns 75% or more of Black Diamond Capital Management I, LLLP, since 10/2011 (Form ADV)
  • Mounir A (mi Only) Nahas Owns 10% to 25% of Black Diamond Capital Management I, LLLP, since 10/2011 (Form ADV)

Built from major holders from Schedules 13D and 13G; stakes of 5% or more it reported on Schedules 13D and 13G (2 companies); owners and owned firms from Form ADV, the registration investment advisers file with the SEC. Each entity in the chart links to its source.

Investment adviser

Black Diamond Capital Management I, LLLP is registered with the SEC as an investment adviser. This is what it reports on Form ADV, the registration every adviser files and keeps current.

  • Assets it manages$10.7B2 38 accounts, all with discretion
  • Employees100 44 in investment advice or research
  • ClientsPooled investment vehicles (other than investment companies and: 38 ($10.7B)
  • How it is paidA percentage of assets under its management; Performance-based fees
  • What it doesPortfolio management for pooled investment vehicles (other than investment companies)
  • Holds client assetsYes: cash and securities
  • RegistrationSEC 801-71712, CRD 154495 IAPD record

Who owns it

Owners of 5% or more as the firm lists them (Schedule A), and the owners of those owners up the chain (Schedule B).

  • Stephen Henry Deckoffowns 75% or more, since 10/2011
  • Mounir A (Mi Only) Nahasowns 10% to 25%, since 10/2011

Filings

5 filings to the SEC since October 2021: 5 other. The latest 5:

  1. Aug 31, 2026N-PX EDGAR
  2. Aug 14, 202613F-HR EDGAR
  3. May 15, 202613F-HR EDGAR
  4. Feb 17, 202613F-HR EDGAR
  5. Nov 14, 202513F-HR EDGAR

Every filing from the last five years, summarized. The full record is on SEC EDGAR.

Stakes it holds

Black Diamond Capital Management I, LLLP has told the SEC it owns more than 5% of 2 companies, latest first (Schedules 13D and 13G).

Sources

The numbers on this page point here. Each one links to the record it came from.

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