Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  POST CONFIRMATION TRUST FOR FLEMING COMPANIES, INC
 2. Date of Event Requiring Statement (Month/Day/Year)
11/07/2005		 3. Issuer Name and Ticker or Trading Symbol
Core-Mark Holding Company, Inc. [CORE]
(Last)
(First)
(Middle)
5801 WEST BROADWAY, SUITE 100		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

OKLAHOMA CITY, OK 73118		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock 2,470,209
D (1) (2)
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
POST CONFIRMATION TRUST FOR FLEMING COMPANIES, INC
5801 WEST BROADWAY, SUITE 100
OKLAHOMA CITY, OK 73118		     X    

Signatures

CASTELLAMARE ADVISORS, LLC, REPRESENTATIVE AND TRUSTEE, BY ROBERT A. KORS 01/11/2006
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Under the Third Amended and Revised Joint Plan of Reorganization (the "Plan") of Fleming Companies, Inc. and its Filing Subsidiaries (the "Debtors") under Chapter 11 of the United States Bankruptcy Code, the Post Confirmation Trust for Fleming Companies, Inc. (the "PCT") is responsible for the review and allowance of any unsecured claims against the Debtors. The PCT is also responsible for directing the distribution of the shares of Core-Mark Holding Company, Inc. ("Core-Mark") with respect to any such allowed unsecured claims.
(2) The PCT was initially responsible for the allocation of 9,800,000 shares of Core-Mark's common stock. The common stock of Core-Mark was first registered under Section 12(g) of the Exchange Act on November 7, 2005. As of November 7, 2005, the PCT had authorized the distribution of 7,329,791 shares of Core-Mark common stock. The remaining 2,470,209 shares remained unallocated as of November 7, 2005 pending future resolution of unsecured claims against the Debtors. The PCT disclaims beneficial ownership of these securities and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

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