X0306 4 2016-02-22 0 0001014507 SIRONA DENTAL SYSTEMS, INC. SIRO 0001609852 Mitsdoerffer Stephan SIRONA DENTAL SYSTEMS, INC. 30-30 47TH AVENUE, SUITE 500 LONG ISLAND CITY NY 11101 0 1 0 0 Chief Accounting Officer Common Stock 2016-02-22 4 M 0 307 86.00 A 11956 D Common Stock 2016-02-22 4 S 0 307 103.00 D 11649 D Common Stock 2016-02-23 4 M 0 250 62.20 A 11899 D Common Stock 2016-02-23 4 M 0 300 67.59 A 12199 D Common Stock 2016-02-23 4 M 0 136 86.00 A 12335 D Common Stock 2016-02-23 4 S 0 1800 103.00 D 10535 D Option (right to buy) 86.00 2016-02-22 4 M 0 307 0.00 D 2024-11-25 Common Stock 307 1465 D Option (right to buy) 62.20 2016-02-23 4 M 0 250 0.00 D 2022-11-20 Common Stock 250 250 D Option (right to buy) 67.59 2016-02-23 4 M 0 300 0.00 D 2023-11-26 Common Stock 300 600 D Option (right to buy) 86.00 2016-02-23 4 M 0 136 0.00 D 2024-11-25 Common Stock 136 1329 D The aggregate 1,772 options originally granted vest as follows: 25% on 11/25/2015, 25% on 11/25/2016, 20% on 11/25/2017, 20% on 11/25/2018 and the final 10% on 11/25/2019. The aggregate 1,000 options originally granted vest as follows: 25% on 11/20/2013, 25% on 11/20/2014, 25% on 11/20/2015 and the final 25% on 11/20/2016. The aggregate 1,200 options originally granted vest as follows: 25% on 11/26/2014, 25% on 11/26/2015, 25% on 11/26/2016 and the final 25% on 11/26/2017. Stephan Mitsdoerffer, by Michael Friedlander, Attorney-In-Fact 2016-02-24