Rock Springs Capital Management’s CASTLIGHT HEALTH, INC. CSLT Stock Holding History

Rock Springs Capital Management’s Portfolio CSLT Stock Details CSLT Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2015 Q4	–	Sell	-1,000,000	Closed	-$4.2M	–	125
2015 Q3	$4.2M	Buy	1,000,000 +200,000	+25%	+$1.26M	0.34%	90
2015 Q2	$6.51M	Buy	800,000 +275,000	+52%	+$2.29M	0.48%	76
2015 Q1	$4.07M	Buy	525,000 +264,800	+102%	+$2.27M	0.38%	83
2014 Q4	$3.04M	Buy	+260,200	New	+$3.11M	0.36%	79
2014 Q2	–	Sell	-100,000	Closed	-$2.12M	–	90
2014 Q1	$2.12M	Buy	+100,000	New	+$2.9M	0.49%	59

Other funds holding CSLT

OMC

Oak Management Corp Wilton, Connecticut $3.24M AUM 83.68% 1-Year Est. Return

Wellcome Trust London, United Kingdom $9.01B AUM 12.05% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return

Baillie Gifford & Co Edinburgh, United Kingdom $97.9B AUM 20.73% 1-Year Est. Return

Prudential plc London, England, United Kingdom $17.1B AUM 15.7% 1-Year Est. Return

EAM

Eventide Asset Management Boston, Massachusetts $6.05B AUM 76.64% 1-Year Est. Return

Alyeska Investment Group Chicago, Illinois $35.4B AUM 33.54% 1-Year Est. Return

Rock Springs Capital Management's CSLT Position: Q4 2015 in Review

Rock Springs Capital Management sold out of CASTLIGHT HEALTH, INC. (CSLT) in Q4 2015, closing a stake of 1,000,000 shares — an estimated $4.2M sold.

Rock Springs Capital Management first reported a position in CSLT in Q1 2014 and held it in 5 quarters. The position peaked at $6.51M in Q2 2015. 96 funds tracked by Wall St. Rank hold CSLT as of Q4 2015.

Rock Springs Capital Management reported no remaining CASTLIGHT HEALTH, INC. position as of Q4 2015 after selling out during the quarter.
Rock Springs Capital Management sold 1,000,000 CASTLIGHT HEALTH, INC. shares in Q4 2015, an estimated $4.2M.
Rock Springs Capital Management first reported a position in CASTLIGHT HEALTH, INC. in Q1 2014 and held it in 5 quarters.
Rock Springs Capital Management's CASTLIGHT HEALTH, INC. position peaked at $6.51M in Q2 2015.
96 funds tracked by Wall St. Rank held CASTLIGHT HEALTH, INC. as of Q4 2015.

Based on Rock Springs Capital Management's 13F filing for Q4 2015, filed 16 Feb 2016.