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
                                                                                  
OMB APPROVAL
OMB Number: 3235-0287
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

Kim Roy		 2. Issuer Name and Ticker or Trading Symbol

CAPSTEAD MORTGAGE CORP [ CMO ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                    _____ 10% Owner
__X__ Officer (give title below)    _____ Other (specify below)
Senior Vice President
(Last)          (First)          (Middle)

8401 N CENTRAL EXPRESSWAY, SUITE 800		 3. Date of Earliest Transaction (MM/DD/YYYY)

2/25/2021
(Street)

DALLAS, TX 75225
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
 6. Individual or Joint/Group Filing (Check Applicable Line)

_X _ Form filed by One Reporting Person
___ 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. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. 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 2/25/2021  M  16284 A (1)247339 D  

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3)		2. Conversion or Exercise Price of Derivative Security3. Trans. Date3A. Deemed Execution Date, if any4. Trans. Code
(Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date7. 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 of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Restricted Stock Units  (1)2/25/2021  M     41860   (1) (1)Common Stock 41860  (1)144305 D  
Explanation of Responses:
(1) On January 3, 2018, the reporting person was granted 41,860 performance units (the "Units") which were convertible into common stock of the Issuer after the conclusion of the performance period beginning January 1, 2018 and ending December 31, 2020, with the conversion factor determined formulaically based on individual achievement of stated performance metrics outlined in the Issuer's 2018 Long-Term Award criteria, and the conversion date determined by the Issuer's Compensation Committee. As a result, 16,284 Units were converted into the Issuer's common stock on February 25, 2021, and 25,576 Units expired without converting into any common stock.
Reporting Owners
Reporting Owner Name / Address
Relationships
Director10% OwnerOfficerOther
Kim Roy
8401 N CENTRAL EXPRESSWAY
SUITE 800
DALLAS, TX 75225

Senior Vice President
Signatures
Roy Kim3/1/2021
**Signature of Reporting PersonDate
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