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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
July 15, 20158.78
June 30, 20159.68
June 15, 201511.81
May 29, 201511.06
May 15, 201512.13
April 30, 201510.59
April 15, 201510.11
March 31, 201518.07
March 13, 201518.94
February 27, 201518
February 13, 201517.66
January 30, 201516.24
January 15, 201515.77
December 31, 201414.78
December 15, 201417.38
November 28, 201416.93
November 14, 201416.45
October 31, 201417.46
October 15, 201419.15
September 30, 201417.82
September 15, 201413.19
August 29, 201412.24
August 15, 201414.8
July 31, 201414.3
July 15, 201412.76
June 30, 20146.86
June 13, 201410.01
May 30, 201410.31
May 15, 20149.33
April 30, 20149.85
April 15, 201410.36
March 31, 201411.7
March 14, 201412.61
February 28, 201411.95
February 14, 201412.03
January 31, 201411.79
January 15, 201415.52
December 31, 201318.16
December 13, 201318.66
November 29, 201316.45
November 15, 201314.77
October 31, 201315.12
October 15, 201313.77
September 30, 201310.76
September 13, 20138.85
August 30, 20139.31
August 15, 20136.46
July 31, 20136.29
July 15, 20134.27
June 28, 20131.3

Institutional Ownership History (%)

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

Date Institutional Ownership
March 31, 201596
December 31, 201493
September 30, 201482
June 30, 201478
March 31, 201475
December 31, 2013100
September 30, 201338
June 30, 201334

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
April 30, 20151
March 31, 20151
February 28, 20151
January 31, 20151
December 31, 20141
November 30, 20141
October 31, 20141
September 30, 20141
August 31, 20141
July 31, 20141
June 30, 20141
May 31, 20142

Top Direct Holders

HolderPositionShares% of Shares
Outstanding
Report Date
Mr. Nick LeschlyPresident and CEO246,2490.75%2015-02-03
Dr. Robert Tepper,M.D.Director, 10% Owner89,0170.27%2015-02-03
Dr. Philip D. Gregory,D.Phil.N/A25,000less than 0.1%2015-06-15
Dr. Steven GillisDirector13,507less than 0.1%2015-06-25
Dr. John M. Maraganore,PhDDirector5,293less than 0.1%2014-12-19
Mr. Eric M. SullivanPrincipal Accounting Officer3,090less than 0.1%2015-07-17
Mr. David P. SchenkeinDirector1,176less than 0.1%2014-12-19

Top Fund Holders

HolderSharesReport Date% of Shares
Outstanding
% of Total
Assets Managed
Market Value
Fidelity Management and Research Company   Premium Plus4,714,0782015-03-3114.420.08569,319,000
Capital Research Global Investors   Premium Plus3,989,3752015-03-3112.200.16481,797,000
Fidelity® Growth Company Fund2,224,7942015-05-316.781.00432,166,234
T. Rowe Price Associates, Inc.   Premium Plus1,921,2682015-03-315.880.05232,032,000
VA CollegeAmerica Small Cap World1,755,5652015-06-305.351.11295,584,479
BlackRock Advisors LLC   Premium Plus1,524,0562015-06-304.640.00256,605,309
Vanguard Group, Inc.   Premium Plus1,386,9242015-03-314.240.01167,499,000
Capital World Investors   Premium Plus1,358,0002015-03-314.150.04164,006,000
Baillie Gifford & Co Limited.   Premium Plus1,283,9622015-03-313.930.29155,064,000
BlackRock Fund Advisors   Premium Plus1,096,6742015-03-313.350.03132,445,000

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