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Sirona Dental Systems Inc (SIRO) Ownership Data

Short Interest History (%)

This is the historical short interest of Sirona Dental Systems Inc, as measured by the Short Percentage Of Float.

Date Short Interest
January 29, 20163.13
January 15, 20163
December 31, 20152.9
December 15, 20153.36
November 30, 20154.38
November 13, 20154.87
October 30, 20155.24
October 15, 20155.15
September 30, 20155.49
September 15, 20154.99
August 31, 20154.98
August 14, 20154.62
July 31, 20155.1
July 15, 20155.97
June 30, 20155.67
June 15, 20156.04
May 29, 20155.12
May 15, 20154.77
April 30, 20154.27
April 15, 20154.17
March 31, 20153.64
March 13, 20153.56
February 27, 20153.9
February 13, 20153.89
January 30, 20154.69
January 15, 20154.18
December 31, 20144.79
December 15, 20144.88
November 28, 20145.83
November 14, 20146.62
October 31, 20146.79
October 15, 20146.3
September 30, 20146.94
September 15, 20147.4
August 29, 20147.25
August 15, 20147.66
July 31, 20147.94
July 15, 20148.18
June 30, 20148.32
June 13, 20147.86
May 30, 20147.3
May 15, 20147.29
April 30, 20146.83
April 15, 20146.7
March 31, 20146.66
March 14, 20145.48
February 28, 20144.95
February 14, 20144.26
January 31, 20144.56
January 15, 20142.64
December 31, 20132.9
December 13, 20132.22
November 29, 20131.92
November 15, 20133.22
October 31, 20133.3
October 15, 20133.31
September 30, 20132.66
September 13, 20132.02
August 30, 20132.36
August 15, 20132.39
July 31, 20131.37
July 15, 20131.63
June 28, 20131.81
June 14, 20132.27
May 31, 20131.75
May 15, 20131.07
April 30, 20130.92
April 15, 20131.01
March 28, 20131.06
March 15, 20131.01
February 28, 20130.92
February 15, 20130.89
January 31, 20130.53
January 15, 20131.16
December 31, 20121.1
December 14, 20121.13
November 30, 20121.49
November 15, 20122.38
October 31, 20122.28
October 15, 20121.68
September 28, 20121.81
September 14, 20121.75
August 31, 20121.76
August 15, 20121.28
July 31, 20121
July 13, 20121.28
June 29, 20120.96
June 15, 20121.24
May 31, 20121.27
May 15, 20121.28
April 30, 20121.37
April 13, 20121.41
March 30, 20121.44
March 15, 20121.7
February 29, 20121.41
February 15, 20121.49
January 31, 20121.79
January 13, 20122.06
December 30, 20112.12
December 15, 20113.33
November 30, 20113.02
November 15, 20111.98
October 31, 20111.98
October 14, 20111.98
September 30, 20112.4
September 15, 20112.42
August 31, 20112.07
August 15, 20111.83
July 29, 20112.65
July 15, 20112.75
June 30, 20112.69
June 15, 20114.66
May 31, 20113.7
May 13, 20113.53
April 29, 20114.4
April 15, 20114.18
March 31, 20114.37
March 15, 20114.84
February 28, 20114.58
February 15, 20113.81
January 31, 20114.09
January 14, 20113.86
December 31, 20103.7
December 15, 20104.68
November 30, 20105.25
November 15, 20104.82
October 29, 20104.62
October 15, 20105.69
September 30, 20106.21
September 15, 20106.61
August 31, 20106.17
August 13, 20105.71
July 30, 20106.57
July 15, 20107.26
June 30, 20107.85
June 15, 20104.62
May 28, 20105.84
May 14, 20105.8
April 30, 20104.79
April 15, 20103.75
March 31, 20103.61
March 15, 20104.46
February 26, 20104.72
February 12, 20105.08
January 29, 20103.82
January 15, 20103.11
December 31, 20091.81
December 15, 20093.56
November 30, 20093.5
November 13, 20093.5
October 30, 20092.97
October 15, 20092.91
September 30, 20092.93
September 15, 20092.98
August 31, 20092.89
August 14, 20092.83
July 31, 20093.52
July 15, 20093.52
June 30, 20093.04
June 15, 20093.18
May 29, 20093.42
May 15, 20093.37
April 30, 20093.71
April 15, 20094.01
March 31, 20094.25
March 13, 20094.78
February 27, 20094.98
February 13, 20095.15
January 30, 20095.01
January 15, 20094.91
December 31, 20085.16
December 15, 20085.6
November 28, 20085.59
November 14, 20085.18
October 31, 20085.29
October 15, 20085.83
September 30, 20087.72
September 15, 20088.38
August 29, 20088.48
August 15, 20088.3
July 31, 20088.33
July 15, 20088.59
June 30, 20089.06
June 13, 20089.37
May 30, 20089.39
May 15, 20088.39
April 30, 20087.29
April 15, 20087.92
March 31, 20087.38
March 14, 20086.32
February 29, 20085.65
February 15, 20085.72
January 31, 20085.33
January 15, 20084.79
December 31, 20074.3
December 11, 20074.27
November 27, 20074.44
November 9, 20074.72
October 26, 20074.77
October 10, 20075.07
September 25, 20074.5
September 11, 20074.42
August 10, 20075.96
July 10, 20075.93
June 12, 20075.32
May 10, 20073.63
April 10, 20072.88
March 12, 20073.29
February 12, 20072.21
January 9, 20072.04
December 12, 20062.26
November 10, 20062.14
October 10, 20062.48
September 12, 20062.79
August 10, 20061.69
July 11, 20062.04
June 12, 20061.8
May 10, 20060.81
April 10, 20061.29
March 10, 20060.6
February 10, 20060.49
January 10, 20060.16

Institutional Ownership History (%)

This the Institutional Ownership History of Sirona Dental Systems IncPeter Lynch prefers to buy companies with low institutional ownership.

Date Institutional Ownership
June 30, 201296.93
March 31, 201187.64
December 31, 201081.45
September 30, 201074.74
June 30, 201075.63
March 31, 201077.05
December 31, 200962.96
September 30, 200947.79
June 30, 200931.78
March 31, 200935.74
December 31, 200835.06
September 30, 200842.32
June 30, 200839.23
March 31, 200837.26
December 31, 200734.07
September 30, 200734.44
June 30, 200734.79
March 31, 200734.92
December 31, 200627.14
September 30, 200616.67
June 30, 20067.73

Insider ownership (%)

This is the historical insider ownership of Sirona Dental Systems Inc. It is usually better to buy companies with large insider ownership. The company insiders' interest are more aligned with external shareholders in this case.

Date Insider Ownership
January 31, 20165.06
December 31, 20154.45
November 30, 20155.07
October 31, 20154.99
September 30, 20154.99
August 31, 20154.99
July 31, 20154.99
June 30, 20154.99
May 31, 20155
April 30, 20154.33
March 31, 20154.33
February 28, 20154.29
January 31, 20154.29
December 31, 20144.35
November 30, 20144.5
October 31, 20144.26
September 30, 20144.26
August 31, 20144.26
July 31, 20144.27
June 30, 20144.27
May 31, 20144.24
March 31, 20144.26
February 28, 20144.28
January 31, 20144.28
December 31, 20134.28
November 30, 20134.29
October 31, 20134.19
September 30, 20134.15
August 31, 20134.15
July 31, 20134.16
June 30, 20134.16
May 31, 20134.16
April 30, 20134.14
March 31, 20134.14
January 31, 20134.12
November 30, 20124.14
October 31, 20124.08
September 30, 20124.08
August 31, 20124.07
July 31, 20124.07
June 30, 20124.07
May 31, 20124.07
April 30, 20124.07
March 31, 20124.02
February 29, 20124.02
January 31, 20124.04
December 31, 20114.04
November 30, 20114.1
October 31, 20113.83
September 30, 20113.83
August 31, 20113.8
July 31, 20113.85
June 30, 20113.88
May 31, 20113.84
April 30, 20113.91
March 31, 20113.93
February 28, 20114.14
January 31, 20114.14
December 31, 20104.15
November 30, 20104.15
October 31, 20103.97
September 30, 20103.97
August 31, 20103.97
July 31, 20103.97
June 30, 20103.97
May 31, 20103.97
April 30, 20103.86
March 31, 20103.87
February 28, 20103.75
January 31, 20104.29
December 31, 20094.29
November 30, 20094.64
October 31, 20094.63
September 30, 20094.63
August 31, 20094.63
July 31, 20094.63
June 30, 20094.63
May 31, 20094.7
April 30, 20095.1
March 31, 20095.1
February 28, 20095.1
January 31, 20095.09
December 31, 20085.09
November 30, 20085.07
October 31, 20085.07
September 30, 20085.07
August 31, 20085.07
July 31, 20085.07
June 30, 20085.07
May 31, 20085.07
April 30, 20081.71
March 31, 20081.71
February 29, 20081.71
January 31, 20081.71
December 31, 20071.71
November 30, 20070.97
October 31, 20071.29
September 30, 20071.34
August 31, 20071.34
July 31, 20071.34
June 30, 20071.34
May 31, 20071.34
April 30, 20071.34
March 31, 20071.34
February 28, 20071.34
January 31, 20071.34
December 31, 20061.34
November 30, 20062.08
October 31, 20062.08
September 30, 20060.5
June 30, 20068.79
April 30, 200629.72
March 31, 200639.5
February 28, 200615.81
January 31, 200617.24
December 31, 200517.12
November 30, 200516.66
October 31, 200516.66
September 30, 200516.76
August 31, 200516.76
July 31, 200516.17
June 30, 200516.21
May 31, 200516.24
April 30, 200530.07
March 31, 200530.09
February 28, 200530.12
January 31, 200530.14
December 31, 200431.69
November 30, 200431.72
October 31, 200431.7
September 30, 200428.37
August 31, 200428.39
July 31, 200428.42
June 30, 200421.51
May 31, 200421.51
April 30, 200431.5
March 31, 200431.5
February 29, 200431.5

Top Direct Holders

HolderPositionShares% of Shares
Outstanding
Report Date
David B. SchickN/A954,1501.7%2004-07-02
Allen Schick,PhDN/A483,4640.86%2005-02-11
Jeffrey T. SlovinCEO402,5320.72%2015-11-25
Michael StoneN/A196,0110.35%2006-06-08
Jost FischerChairman and CEO112,2490.2%2012-12-08
Jonathan I. FriedmanGeneral Counsel and Secretary74,5720.13%2015-11-25
Stan MandelkernN/A74,5210.13%2006-06-13
Simone BlankExec Vice President and CFO68,5000.12%2012-12-08
Curtis M. Rocca,IIIN/A53,000less than 0.1%2006-06-14
Ari NeugroschlN/A47,980less than 0.1%2006-06-12

Top Fund Holders

HolderSharesReport Date% of Shares
Outstanding
% of Total
Assets Managed
Market Value($1000)
Generation Investment Management LLP   Premium Plus4,002,4232015-09-307.575.71395,039
BlackRock Advisors LLC   Premium Plus3,902,3172015-12-316.98N/A427,577
Vanguard Group Inc   Premium Plus3,808,6222015-09-307.210.03375,911
Neuberger Berman LLC   Premium Plus3,413,0652015-09-306.460.43336,870
T. Rowe Price Associates, Inc.   Premium Plus3,086,7962015-09-305.840.07304,667
Veritas Asset Management LLP   Premium Plus2,944,3002015-12-315.27N/A322,607
Ruane, Cunniff & Goldfarb Inc Premium2,826,4052015-09-305.061.35263,817
William Blair Investment Management, LLC   Premium Plus2,421,4722015-09-304.580.49238,999
BlackRock Fund Advisors   Premium Plus1,946,3342015-09-303.680.05192,103
Neuberger Berman Investment Advisers LLC1,697,8262015-12-313.041.45185,760

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