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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1014507	Sirona Dental Systems Inc.	SIRO	Dental Equipment & Supplies (3843)	113374812

Insiders

Cik	Name	Reported Address	Director	Officer	Large Shareholder	Other
1339571	S.c.a. Luxco Holdings Sirona	412F, Route D??Esch L-1030 N4	No	No	Yes	No
1340524	S.a. Holdings Sirona	412F, Route D??Esch L-1030 N4	No	No	Yes	No
1340526	Mdcp Iv Global Gp, Lp	Maples Corporate Services Ltd, Po Box309 United House, South Church Street George Town, Grand Cayman E9 KY-1104	No	No	Yes	No
1340527	Ltd Investors Global Mdp	Maples Corporate Services Ltd, Po Box309 United House, South Church Street George Town, Grand Cayman E9 KY-1104	No	No	Yes	No
1340528	Mdcp Iv Global Investments Lp	Maples Corporate Services Ltd, Po Box309 United House, South Church Street George Town, Grand Cayman E9 KY-1104	No	No	Yes	No
1478849	Mdcp Global Aggregator, L.p.	C/O Madison Dearborn Partners, Llc Three First National Plaza, Suite 4600 Chicago IL 60602	No	No	Yes	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2011-05-13	9,747,480	$53.00	0	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Direct

Footnotes

The following entities may be deemed to have a beneficial interest in the Common Stock held by Sirona Holdings Luxco S.C.A. ("Luxco"): Sirona Holdings S.A by virtue of its being the sole manager of Luxco; MDCP Global Aggregator, L.P. ("MDCP Global Aggregator") by virtue of its being the controlling shareholder of Luxco; MDCP IV Global Investments LP by virtue of its being the controlling shareholder of Sirona Holdings S.A.; MDP IV Global GP, LP by virtue of its being the sole general partner of MDCP IV Global Investments LP; and MDP Global Investors Limited, by virtue of its being the sole general partner of MDP IV Global GP, LP and MDCP Global Aggregator. Each of MDCP Global Aggregator, MDCP IV Global Investments LP, MDP IV Global GP, LP and MDP Global Investors Limited disclaims beneficial ownership of any shares directly held by Luxco, except to the extent of their respective pecuniary interests therein.