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 *   Page Anthony R 2. Date of Event Requiring Statement (Month/Day/Year) 06/12/2006 3. Issuer Name and Ticker or Trading Symbol CAPSTEAD MORTGAGE CORP [CMO] (Last) (First) (Middle) 8401 N. CENTRAL EXPRESSWAY, SUITE 800 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Senior Vice President 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) DALLAS, TX 75225 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 11,000 D   Common Stock 760 I by IRA

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
Series B Convertible Preferred	  (1)	  (1)	Common Stock	1,187	$ (1)	D	Â
Series B Convertible Preferred	  (1)	  (1)	Common Stock	93	$ (1)	I	by IRA

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Page Anthony R 8401 N. CENTRAL EXPRESSWAY SUITE 800 DALLAS, TX 75225	Â	Â	  Senior Vice President	Â

Signatures

Anthony R. Page		06/14/2006
**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)	The Capstead $1.26 Cumulative Convertible Preferred Stock, Series B, is traded on the New York Stock exchange under the symbol CMOPRB. The preferred stock is perpetual and is convertible into the Capstead common stock at any time at the stockholder's option. The preferred stock is callable at the option of the company at $12.50 per share and an exercise date and price are not applicable.

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