Ghost Tree Capital, LLC

Holdings History for BLUEBIRD BIO INC - COM (BLUE)

Symbol: BLUE on Nasdaq
Investment type: Equity / COM

Shares, Excluding Options vs Price

Value, Excluding Options

Holdings date	Weight	Change	Value $	Shares	Change	Activity %	Price	All Holders
31 Mar 2024		-0.37%	$0	0	-465,000	-100%		Q1 2024
31 Dec 2023	0.37%	+0.37%	$641,700	465,000	+465,000	NEW	$1.38	Q4 2023
31 Dec 2018		-2.8%	$0	0	-75,000	-100%		Q4 2018
30 Sep 2018	2.8%	-1.1%	$10,950,000	75,000	-30,000	-29%	$146.00	Q3 2018
30 Jun 2018	4.9%	+4.9%	$16,480,000	105,000	+105,000	NEW	$156.95	Q2 2018
31 Mar 2017		-0.56%	$0	0	-30,000	-100%		Q1 2017
31 Dec 2016	0.56%	-0.56%	$1,851,000	30,000	-30,000	-50%	$61.70	Q4 2016
30 Sep 2016	1.2%	-2.2%	$4,067,000	60,000	-110,000	-65%	$67.78	Q3 2016
30 Jun 2016	3.5%	+3.5%	$7,359,000	170,000	+170,000	NEW	$43.29	Q2 2016
31 Mar 2016		-3.3%	$0	0	-120,000	-100%		Q1 2016
31 Dec 2015	3.3%	+3.3%	$7,706,000	120,000	+120,000	NEW	$64.22	Q4 2015
30 Jun 2015		-1.6%	$0	0	-30,000	-100%		Q2 2015
31 Mar 2015	1.6%	0%	$3,623,000	30,000	0		$120.77	Q1 2015
31 Dec 2014	1.6%	-0.27%	$2,752,000	30,000	-5,000	-14%	$91.73	Q4 2014
30 Sep 2014	0.9%	+0.9%	$1,256,000	35,000	+35,000	NEW	$35.89	Q3 2014

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.