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bluebird bio Inc (BLUE) Ownership Data

Short Interest History (%)

This is the historical short interest of bluebird bio Inc, as measured by the Short Percentage Of Float.

Date Short Interest (%)Short Interest (Shares in Mil)
November 15, 201639.978.70
October 31, 201642.239.19
October 14, 201639.88.66
September 30, 201640.628.84
September 15, 201640.938.91
August 31, 2016398.49
August 15, 201639.138.52
July 29, 201638.288.33
July 15, 201638.818.45
June 30, 201641.729.08
June 15, 201634.847.58
May 31, 201632.667.11
May 13, 201633.017.19
April 29, 201630.596.66
April 15, 201629.16.33
March 31, 201628.426.55
March 15, 201628.266.52
February 29, 201626.696.16
February 12, 201627.456.33
January 29, 201622.695.23
January 15, 201621.394.93
December 31, 201521.274.91
December 15, 201519.84.57
November 30, 201515.093.48
November 13, 201515.713.62
October 30, 201513.433.10
October 15, 201514.623.37
September 30, 201514.363.31
September 15, 201513.13.02
August 31, 201512.882.97
August 14, 201510.022.31
July 31, 20158.391.94
July 15, 20158.782.02
June 30, 20159.682.23
June 15, 201511.812.72
May 29, 201511.062.55
May 15, 201512.132.80
April 30, 201510.592.44
April 15, 201510.112.33
March 31, 201518.072.31
March 13, 201518.942.42
February 27, 2015182.30
February 13, 201517.662.25
January 30, 201516.242.07
January 15, 201515.772.01
December 31, 201414.781.89
December 15, 201417.382.22
November 28, 201416.932.16
November 14, 201416.452.10
October 31, 201417.462.23
October 15, 201419.152.44
September 30, 201417.822.28
September 15, 201413.191.68
August 29, 201412.241.56
August 15, 201414.81.89
July 31, 201414.31.83
July 15, 201412.761.63
June 30, 20146.860.88
June 13, 201410.011.28
May 30, 201410.311.32
May 15, 20149.331.19
April 30, 20149.851.26
April 15, 201410.361.30
March 31, 201411.71.47
March 14, 201412.611.58
February 28, 201411.951.50
February 14, 201412.031.51
January 31, 201411.791.48
January 15, 201415.521.95
December 31, 201318.162.28
December 13, 201318.662.34
November 29, 201316.452.06
November 15, 201314.771.85
October 31, 201315.121.90
October 15, 201313.771.73
September 30, 201310.761.35
September 13, 20138.851.11
August 30, 20139.311.17
August 15, 20136.460.81
July 31, 20136.290.79
July 15, 20134.270.54
June 28, 20131.30.16

Institutional Ownership History (%)

This the Institutional Ownership History of bluebird bio IncPeter Lynch prefers to buy companies with low institutional ownership.

Date Institutional Ownership (%)Institutional Ownership (Shares in Mil)
June 30, 201597.4935.08
March 31, 201596.8431.65
December 31, 201492.8830.03
September 30, 201482.2623.61
June 30, 201478.1619.60
March 31, 201475.6918.38
September 30, 201337.568.88
June 30, 201333.578.16

Insider ownership (%)

This is the historical insider ownership of bluebird bio 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 (%)Insider Ownership (Shares in Mil)
October 31, 20161.450.54
September 30, 20161.450.54
August 31, 20161.450.54
July 31, 20161.460.54
June 30, 20161.410.52
May 31, 20161.410.52
April 30, 20161.410.52
March 31, 20161.410.52
February 29, 20161.420.52
January 31, 20161.250.46
December 31, 20151.410.52
November 30, 20151.240.46
October 31, 20151.060.39
September 30, 20151.070.39
August 31, 20151.070.39
July 31, 20151.070.39
June 30, 20151.060.38
May 31, 20150.950.34
April 30, 20151.050.34
March 31, 20151.060.34
February 28, 20151.060.34
January 31, 20151.190.34
December 31, 20141.180.34
November 30, 20140.970.28
October 31, 20140.990.28
September 30, 20141.20.34
August 31, 20141.180.34
July 31, 20141.420.35
June 30, 20141.420.35
May 31, 20141.760.43

Top Direct Holders

HolderPositionShares% of Shares
Outstanding
Report Date
Mr. Nick LeschlyPresident and CEO355,8700.95%2016-06-24
Dr. Robert Tepper,M.D.N/A89,0170.24%2015-02-03
Dr. Philip D. Gregory,D.Phil.Chief Scientific Officer30,069less than 0.1%2016-06-16
Dr. Steven GillisN/A18,633less than 0.1%2015-07-28
Mr. Jeffrey T. WalshN/A14,000less than 0.1%2016-03-01
Dr. Douglas G. Cole, M.D.N/A9,938less than 0.1%2016-03-01
Dr. David Davidson, M.D.Chief Medical Officer9,600less than 0.1%2016-07-15
Mr. Eric M. SullivanPrincipal Accounting Officer5,641less than 0.1%2016-10-03
Daniel S. LynchN/A1,400less than 0.1%2016-06-02
Dr. John M. Maraganore,PhDN/A1,000less than 0.1%2016-06-02

Top Fund Holders

HolderSharesReport Date% of Shares
Outstanding
% of Total
Assets Managed
Market Value($1000)
T. Rowe Price Associates, Inc.   Premium Plus3,365,7972016-09-309.020.05228,134
State Street Corp   Premium Plus1,659,5172016-09-304.450.01112,485
Baillie Gifford & Co Limited.   Premium Plus4,998,8332016-09-3013.400.53338,821
Capital Research Global Investors   Premium Plus3,992,8092016-09-3010.710.09270,633
Vanguard Group Inc   Premium Plus2,735,7322016-09-307.340.01185,428
Fidelity Management and Research Company   Premium Plus5,565,3942016-09-3014.920.05377,222
Wellington Management Company LLP   Premium Plus1,963,6392016-09-305.270.03133,096
Fidelity® Growth Company Fund2,482,9812016-10-316.660.33118,562
Growth Fund of America Inc2,352,0762015-12-316.38N/A151,050
VA CollegeAmerica Small Cap World1,619,3522016-09-304.340.40109,760

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