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
	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* BRYANT DOUGLAS C (Last) (First) (Middle) 9975 SUMMERS RIDGE ROAD (Street) SAN DIEGO CA 92121 (City) (State) (Zip)	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 X Officer (give title below) Other (specify below) President & CEO
	3. Date of Earliest Transaction (Month/Day/Year) 11/20/2019
	4. If Amendment, Date of 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

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	11/20/2019		M		4,023	A	$15.19	305,465	D
Common Stock	11/20/2019		M		96,217	A	$22.21	401,682	D
Common Stock	11/20/2019		M		93,021	A	$27.57	494,703	D
Common Stock	11/20/2019		M		93,847	A	$23.41	588,550	D
Common Stock	11/20/2019		M		70,386	A	$15.4	658,936	D
Common Stock	11/20/2019		M		20,250	A	$21.08	679,186	D
Common Stock	11/20/2019		F(1)		252,173	D	$65.82	427,013	D

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
Non-Qualified Stock Options	$15.19	11/20/2019		M			4,023	(2)	03/02/2022	Common Stock	4,023	$0.00	0	D
Non-Qualifed Stock Options	$22.21	11/20/2019		M			96,217	(3)	02/25/2023	Common Stock	96,217	$0.00	0	D
Non-Qualified Stock Options	$27.57	11/20/2019		M			93,021	(4)	02/24/2024	Common Stock	93,021	$0.00	0	D
Non-Qualified Stock Options	$23.41	11/20/2019		M			93,847	(5)	02/05/2025	Common Stock	93,847	$0.00	0	D
Non-Qualified Stock Options	$15.4	11/20/2019		M			70,386	(6)	02/10/2026	Common Stock	70,386	$0.00	23,461	D
Non-Qualified Stock Options	$21.08	11/20/2019		M			20,250	(7)	02/15/2027	Common Stock	20,250	$0.00	20,249	D

Explanation of Responses:

1. On November 20, 2019, the reporting person exercised options to acquire 377,744 shares of the Issuer's common stock. Also on November 20, 2019, as permitted by the option award agreements, the reporting person delivered 128,695 shares of the Issuer's common stock owned by the reporting person and having a fair market value on the date of exercise equal to the aggregate option exercise price and 123,478 shares of the issuer's common stock owned by the reporting person and having a fair market value of the date of exercise equal to the reporting person's tax withholding obligation.

2. 60,196 shares vested on the second anniversary date of the grant date, March 2, 2014. 30,098 shares vested on the third anniversary date of the grant date, March 2, 2015. 30,099 shares vested on the fourth anniversary date of the grant date, March 2, 2016.

3. 48,109 shares vested on the second anniversary date of the grant date, February 25, 2015. 24,054 shares vested on the third anniversary date of the grant date, February 25, 2016. 24,054 shares vested on the fourth anniversary date of the grant date, February 25, 2017.

4. 46,510 shares vested on the second anniversary date of the grant date, February 24, 2016. 23,255 shares vested on the third anniversary date of the grant date, February 23, 2017. 23,256 shares vested on the fourth anniversary date of the grant date, February 24, 2018.

5. 46,924 shares vested on the second anniversary date of the grant date, February 5, 2017. 23,462 shares vested on the third anniversary date of the grant date, February 5, 2018. 23,461 shares vested on the fourth anniversary date of the grant date, February 5, 2019.

6. 46,924 shares vested on the second anniversary date of the grant date, February 10, 2018. 23,462 shares vested on the third anniversary date of the grant date, February 10, 2019. 23,461 shares will vest on the fourth anniversary date of the grant date, February 10, 2020.

7. 20,250 shares vested on the second anniversary date of the grant date, February 15, 2019. 10,125 shares will vest on the third anniversary date of the grant date, February 15, 2020. 10,124 shares will vest on the fourth anniversary date of the grant date, February 15, 2021.

Remarks:

	Robert J. Bujarski, attorney-in-fact for Douglas C. Bryant	11/22/2019
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
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