SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
X	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* DE SHAW LAMINAR PORTFOLIOS LLC (Last) (First) (Middle) 39TH FLOOR, TOWER 45 120 WEST FORTY-FIFTH STREET (Street) NEW YORK NY 10036 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol RIVIERA HOLDINGS CORP [ RIV ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director X 10% Owner Officer (give title below) X Other (specify below) See Footnote 1.
	3. Date of Earliest Transaction (Month/Day/Year) 03/31/2006
	4. If Amendment, Date of 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

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	03/31/2006		S		50,000	D	$16.95	1,219,900	D(1)

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 Securities Underlying Derivative Security (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: 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

1. Name and Address of Reporting Person* DE SHAW LAMINAR PORTFOLIOS LLC (Last) (First) (Middle) 39TH FLOOR, TOWER 45 120 WEST FORTY-FIFTH STREET (Street) NEW YORK NY 10036 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) X Other (specify below) See Footnote 1.

1. Name and Address of Reporting Person* SHAW D E & CO L P /NY/ (Last) (First) (Middle) 39TH FLOOR, TOWER 45 120 WEST FORTY-FIFTH STREET (Street) NEW YORK NY 10036 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) X Other (specify below) See Footnote 1.

1. Name and Address of Reporting Person* D E SHAW & CO LLC (Last) (First) (Middle) 39TH FLOOR, TOWER 45 120 WEST FORTY-FIFTH STREET (Street) NEW YORK NY 10036 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) X Other (specify below) See Footnote 1.

1. Name and Address of Reporting Person* SHAW DAVID E (Last) (First) (Middle) 39TH FLOOR, TOWER 45 120 WEST FORTY-FIFTH STREET (Street) NEW YORK NY 10036 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) X Other (specify below) See Footnote 1.

Explanation of Responses:

1. As noted above, on March 31, 2006, D. E. Shaw Laminar Portfolios, L.L.C. ("Laminar") disposed of 50,000 shares of the common stock, par value $0.001 per share (the "Common Stock"), of the Issuer to which this form relates. As a result of this transaction, the Reporting Owners are no longer subject to Section 16. The Common Stock is now held or managed directly as follows: (i) Laminar holds 1,194,500 shares; (ii) D. E. Shaw Valence Portfolios, L.L.C. ("Valence") holds 25,200 shares; and (iii) 200 shares are under the management of D. E. Shaw Investment Management, L.L.C. ("DESIM"), which has dispositive control over, but no voting rights with respect to, the shares.

Remarks:

	D. E. Shaw Laminar Portfolios, L.L.C., By: D. E. Shaw & Co., L.L.C., as managing member, By: /s/ Julius Gaudio, Managing Director	04/04/2006
	D. E. Shaw & Co., L.P., By: /s/ Julius Gaudio, Managing Director	04/04/2006
	D. E. Shaw & Co., L.L.C., By: /s/ Julius Gaudio, Managing Director	04/04/2006
	David E. Shaw, By: /s/ Julius Gaudio, Attorney-in-Fact for David E. Shaw	04/04/2006
	** Signature of Reporting Person	Date
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