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 *
Dammeyer Rodney F
   2. Issuer Name and Ticker or Trading Symbol
QUIDEL CORP /DE/ [QDEL] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
10165 MCKELLAR COURT		 3. Date of Earliest Transaction (Month/Day/Year)
05/10/2013
(Street)

SAN DIEGO, CA 92121		 4. If Amendment, Date Original Filed(Month/Day/Year)
 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 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 05/10/2013   M   3,212 (1) A $ 0 3,212 D  
Common Stock 05/10/2013   M   642 (1) A $ 0 3,854 D  
Common Stck 05/14/2013   M   2,600 (1) A $ 0 6,454 (2) D  

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
Restricted Stock Units (Converted) (3) 05/14/2013   A   2,327     (4)   (5) Common Stock 2,327 $ 0 2,327 D  
Restricted Stock Units (Premium) (3) 05/14/2013   A   465   05/14/2014   (5) Common Stock 465 $ 0 465 D  
Non-Qualified Stock Option $ 23.7 05/14/2013   A   8,081   05/14/2014 05/14/2023 Common Stock 8,081 $ 0 8,081 D  
Restricted Stock Units (Equity Grant) (3) 05/14/2013   A   371   05/14/2014   (6) Common Stock 371 $ 0 371 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Dammeyer Rodney F
10165 MCKELLAR COURT
SAN DIEGO, CA 92121		   X      

Signatures

 Robert J. Bujarski, attorney-in-fact for Rodney F. Dammeyer   05/16/2013
**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) Reflects vesting of prior restricted stock units, which were previously reported on a Form 4.
(2) In addition to the shares reported on this Form 4 as directly owned by the Reporting Person, 54,238 shares are held indirectly by the Dammeyer Family Trust. The Reportig Person disclaims all beneficial ownership of the shares owned by the Dammeyer Family Trust, except to the extent of his pecuniary interest, if any, and the inclusion of these shares in this Report should not be deemed an admission of beneficial ownership of all of the reported shares for purposes of Section 16 or for any other purpose.
(3) Each restricted stock unit represents the right to receive one share of Quidel Corporation common stock.
(4) The restricted stock units vest on the date of grant, May 14, 2013.
(5) The restricted stock units were received in lieu of cash payments to the reporting person for certain retainer and Board of Director service-related fees under a deferred compensation program applicable to participating non-employee directors.
(6) The restricted stock units vest upon the earlier of (a) immediately prior to the annual meeting of Quidel Corporation's stockholders in 2014 or (b) on the first anniversary of the grant date or May 14, 2014.

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