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 *   SCHAPIRO MARY L 2. Date of Event Requiring Statement (Month/Day/Year) 04/03/2006 3. Issuer Name and Ticker or Trading Symbol Duke Energy CORP [DUK] (Last) (First) (Middle) 526 S. CHURCH STREET 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) CHARLOTTE, NC 28202 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 3,658.8302 (1) D Â

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
Phantom Stock	  (2)	  (2)	Common Stock	16,582.017 (1)	$ (3)	D	Â
Stock Option (Right to buy)	  (4)	01/01/2009	Common Stock	19,500 (1)	$ 21.875	D	Â
Stock Option (Right to buy)	  (5)	12/14/2009	Common Stock	15,600 (1)	$ 15.264	D	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
SCHAPIRO MARY L 526 S. CHURCH STREET CHARLOTTE, NC 28202	  X	Â	Â	Â

Signatures

By: David S. Maltz, attorney-in-fact		04/13/2006
**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)	On April 3, 2006, Cinergy Corp. ('Issuer') merged into a wholly-owned subsidiary of Duke Energy Holding Corp. (now known as Duke Energy Corporation) ('Duke Energy'). In connection with the merger, each share of Issuer's common stock was converted into the right to receive 1.56 shares of Duke Energy's common stock and each stock option of Issuer was converted by multplying the number of Issuer shares previously covered by the option by 1.56 and dividing the prior exercise price of the option by 1.56.
(2)	Generally payable upon reporting person's termination of service.
(3)	The derivative security converts into common stock on a one-for-one basis and will be settled in stock.
(4)	The reporting person was granted 12,500 stock options on January 1, 1999. The options became exercisable in five equal annual installments.
(5)	The reporting person was granted 10,000 stock options on December 14, 1999. The options became exercisable in five equal annual installments.

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