bluebird bio Ownership

Who are the major shareholders and have insiders been buying or selling?

Recent Insider Transactions

NasdaqGS:BLUE Recent Insider Transactions by Companies or Individuals
Date	Value	Name	Entity	Shares	Max Price
03 Jun 24	SellUS$3,726	Thomas Klima	Individual	3,834	US$0.97
04 Mar 24	SellUS$6,986	Thomas Klima	Individual	4,573	US$1.53
04 Mar 24	SellUS$9,311	Andrew Obenshain	Individual	6,095	US$1.53
01 Mar 24	SellUS$10,342	Richard Colvin	Individual	6,770	US$1.53
05 Feb 24	SellUS$4,708	Joseph Vittiglio	Individual	5,217	US$0.90
05 Feb 24	SellUS$2,449	Thomas Klima	Individual	2,714	US$0.90
05 Feb 24	SellUS$1,696	Andrew Obenshain	Individual	1,879	US$0.90
05 Jan 24	SellUS$845	Richard Colvin	Individual	597	US$1.42
05 Jan 24	SellUS$4,520	Andrew Obenshain	Individual	3,162	US$1.43
06 Dec 23	SellUS$20,437	Christopher Krawtschuk	Individual	4,526	US$4.52
03 Nov 23	SellUS$2,555	Andrew Obenshain	Individual	807	US$3.17
02 Nov 23	SellUS$6,975	Richard Colvin	Individual	2,343	US$2.98
05 Sep 23	SellUS$3,493	Thomas Klima	Individual	922	US$3.79
10 Aug 23	SellUS$59,956	Andrew Obenshain	Individual	16,929	US$3.54

Insider Trading Volume

Insider Buying: BLUE insiders have only sold shares in the past 3 months.

Ownership Breakdown

What is the ownership structure of BLUE?
Owner Type	Number of Shares	Ownership Percentage
Private Companies	1,313	0.000681%
Individual Insiders	857,984	0.445%
General Public	81,572,836	42.3%
Institutions	110,309,803	57.2%

Dilution of Shares: Shareholders have been substantially diluted in the past year, with total shares outstanding growing by 81.1%.

Top Shareholders

Top 25 shareholders own 46.51% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
7.88%	BlackRock, Inc.	15,178,562	US$14.7m	69%	no data
5.45%	The Vanguard Group, Inc.	10,498,460	US$10.2m	19.6%	no data
4%	Granahan Investment Management, LLC	7,711,669	US$7.5m	-4.53%	0.26%
3.32%	Columbia Management Investment Advisers, LLC	6,392,198	US$6.2m	132%	no data
3.24%	Millennium Management LLC	6,239,541	US$6.0m	82.8%	0.01%
2.37%	Palo Alto Investors LP	4,560,171	US$4.4m	36.8%	0.45%
2.24%	Geode Capital Management, LLC	4,318,267	US$4.2m	82.2%	no data
2.07%	Norges Bank Investment Management	3,995,600	US$3.9m	0%	no data
1.78%	State Street Global Advisors, Inc.	3,428,135	US$3.3m	-75.3%	no data
1.44%	Two Sigma Investments, LP	2,774,042	US$2.7m	-4.7%	0.01%
1.3%	Tang Capital Management, LLC	2,500,000	US$2.4m	47.1%	0.26%
1.23%	FMR LLC	2,380,023	US$2.3m	0.15%	no data
1.14%	Renaissance Technologies LLC	2,187,700	US$2.1m	-17.1%	no data
1.06%	PFM Health Sciences, LP	2,042,651	US$2.0m	0%	0.1%
0.93%	Jackson National Asset Management, LLC	1,791,142	US$1.7m	-15%	0.03%
0.89%	Frazier Life Sciences Management, LP	1,709,907	US$1.7m	0%	0.08%
0.85%	Dimensional Fund Advisors LP	1,647,546	US$1.6m	-45%	no data
0.84%	Northern Trust Global Investments	1,621,230	US$1.6m	62.1%	no data
0.78%	JP Morgan Asset Management	1,509,354	US$1.5m	-4.67%	no data
0.69%	Susquehanna International Group, LLP, Asset Management Arm	1,333,299	US$1.3m	-10.2%	no data
0.65%	Alyeska Investment Group, L.P.	1,255,937	US$1.2m	-81.8%	0.01%
0.62%	Morgan Stanley, Investment Banking and Brokerage Investments	1,194,508	US$1.2m	8.84%	no data
0.61%	Hudson Bay Capital Management LP	1,180,115	US$1.1m	-46%	0.01%
0.6%	Two Sigma Advisers, LP	1,160,800	US$1.1m	215%	no data
0.54%	Bleichroeder LP	1,037,379	US$1.0m	-58.5%	0.24%