Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN 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 *
Fortress Investment Holdings LLC
  2. Issuer Name and Ticker or Trading Symbol
ACA Capital Holdings Inc [ACA]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
_____ Officer (give title below) __X__ Other (specify below)
See "Remarks"
(Last)
(First)
(Middle)
1345 AVENUE OF THE AMERICAS, 46TH FLOOR, 
3. Date of Earliest Transaction (Month/Day/Year)
11/15/2006
(Street)

NEW YORK, NY 10105
4. If Amendment, Date Original Filed(Month/Day/Year)
6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)
7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 11/15/2006   C   963,236.47 A (1) 963,236.47 I By Drawbridge Special Opportunities Fund LP (2)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)
6. Date Exercisable and Expiration Date
(Month/Day/Year)
7. Title and Amount of Underlying Securities
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)
10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)
11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Series B Senior Convertible Preferred Stock (1) 11/15/2006   C     963,236.47   (1)   (1) Common Stock 963,236.47 $ 0 0 I By Drawbridge Special Opportunities Fund LP (2)

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Fortress Investment Holdings LLC
1345 AVENUE OF THE AMERICAS, 46TH FLOOR
NEW YORK, NY 10105
      See "Remarks"
DRAWBRIDGE SPECIAL OPPORTUNITIES FUND LP
C/O FORTRESS INVESTMENT GROUP LLC
1345 AVENUE OF THE AMERICAS, 46TH FLOOR
NEW YORK, NY 10105
      See "Remarks"
Drawbridge Special Opportunities GP LLC
1345 AVENUE OF THE AMERICAS, 46TH FLOOR
NEW YORK, NY 10105
      See "Remarks"
DRAWBRIDGE SPECIAL OPPORTUNITIES ADVISORS LLC
C/O FORTRESS INVESTMENT GROUP LLC
1345 AVENUE OF THE AMERICAS, 46TH FLOOR
NEW YORK, NY 10105
      See "Remarks"
Fortress Principal Investment Holdings IV LLC
1345 AVENUE OF THE AMERICAS, 46TH FLOOR
NEW YORK, NY 10105
      See "Remarks"
FORTRESS INVESTMENT GROUP LLC
1345 AVENUE OF THE AMERICAS
46TH FLOOR
NEW YORK, NY 10105
      See "Remarks"

Signatures

 See signatures included in Exhibit 99.1   11/15/2006
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(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) The Series B Senior Convertible Preferred Stock converted into shares of the issuer's common stock on a six-for-one basis and had no expiration date.
(2) Drawbridge Special Opportunities GP LLC ("Special Opportunities GP") is the general partner of Drawbridge Special Opportunities Fund LP ("Special Opportunities LP"). Fortress Principal Investment Holdings IV LLC ("FPIH IV") is the sole managing member of Special Opportunities GP. Pursuant to management agreements, Drawbridge Special Opportunities Advisors LLC ("Special Opportunities Advisors") is the manager of Special Opportunities LP. Fortress Investment Group LLC ("FIG") is the sole managing member of Special Opportunities Advisors. FIG is 100% owned by Fortress Investment Holdings LLC. Each reporting person disclaims beneficial ownership of all reported shares except to the extent of its pecuniary interest therein and the inclusion of the shares in this report shall not be deemed an admission of beneficial ownership of all of the reported shares for purposes of Section 16 or otherwise.
 
Remarks:
The reporting persons may be deemed members of a Section 13(d) "group" together with other persons that are parties to the issuer's stockholders agreement.  The reporting persons disclaim membership in a "group" and disclaim beneficial ownership of the shares beneficially owned by such other persons.

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