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
X	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* Kowaloff Arthur D (Last) (First) (Middle) C/O SIRONA DENTAL SYSTEMS, INC. 30-30 47TH AVENUE, SUITE 500 (Street) LONG ISLAND CITY NY 11101 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol SIRONA DENTAL SYSTEMS, INC. [ SIRO ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 02/29/2016
	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	12/17/2015		G	V	700	D	$0	16,415	D
Common Stock	02/29/2016		D		16,415(1)	D	(2)(3)	0	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
Option (right to buy)	$42.5(4)	02/29/2016		D			15,000(5)	(6)	06/21/2016	Common Stock	15,000	$0	0	D
Option (right to buy)	$31.15(4)	02/29/2016		D			15,000(5)	(6)	08/13/2017	Common Stock	15,000	$0	0	D
Option (right to buy)	$27(4)	02/29/2016		D			5,000(5)	(6)	05/12/2018	Common Stock	5,000	$0	0	D

Explanation of Responses:

1. Includes 3,860 restricted stock units ("RSU").

2. On February 29, 2016, pursuant to an Agreement and Plan of Merger, dated as of September 15, 2015 (the "Merger Agreement"), by and among Sirona Dental Systems, Inc. ("Sirona"), DENTSPLY International Inc. ("DENTSPLY") and Dawkins Merger Sub Inc., a wholly owned subsidiary of DENTSPLY ("Merger Sub"), Merger Sub merged with and into Sirona, with Sirona continuing as the surviving entity and a wholly owned subsidiary of DENTSPLY (the "Merger"). Upon completion of the Merger, DENTSPLY changed its corporate name to "DENTSPLY SIRONA Inc."

3. Disposed of pursuant to the Merger Agreement in which (x) each share of Sirona common stock issued and outstanding immediately prior to the consummation of the Merger was converted into 1.8142 shares of DENTSPLY common stock and (y) each unvested RSU outstanding immediately prior to the consummation of the Merger was assumed by DENTSPLY and was converted into 1.8142 RSUs of DENTSPLY on the same terms and conditions as were in effect immediately prior to the completion of the Merger; in each case rounded down to the nearest whole share or RSU, as applicable.

4. The exercise price per share of each converted Sirona stock option will be determined by dividing the per share exercise price of such stock option by the 1.8142 exchange ratio, and rounding up to the nearest whole cent.

5. Disposed of pursuant to the Merger Agreement in which each outstanding and unexercised option to acquire shares of Sirona common stock, whether or not vested or exercisable, was assumed by DENTSPLY and was converted into an option to acquire shares of DENTSPLY common stock on the same terms and conditions as were in effect immediately prior to the completion of the Merger based on the 1.8142 exchange ratio, rounded down to the nearest whole share.

6. This option is fully vested and exercisable.

	/s/ Michael Friedlander, Attorney-in-Fact for Arthur D. Kowaloff	03/01/2016
	** Signature of Reporting Person	Date
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