Rock Springs Capital Management’s Alkermes ALKS Stock Holding History

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

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$10.5M	Buy	199,811 +15,825	+9%	+$618K	0.51%	54
2026 Q1	$6.51M	Buy	183,986 +44,758	+32%	+$1.39M	0.38%	60
2025 Q4	$3.9M	Buy	139,228 +32,691	+31%	+$979K	0.2%	81
2025 Q3	$3.2M	Buy	+106,537	New	+$3M	0.19%	72
2017 Q3	–	Sell	-52,000	Closed	-$3.01M	–	148
2017 Q2	$3.01M	Sell	52,000 -73,000	-58%	-$4.24M	0.15%	114
2017 Q1	$7.31M	Hold	125,000	–	–	0.42%	73
2016 Q4	$6.95M	Sell	125,000 -58,027	-32%	-$3.1M	0.46%	61
2016 Q3	$8.61M	Sell	183,027 -11,473	-6%	-$546K	0.54%	56
2016 Q2	$8.41M	Hold	194,500	–	–	0.62%	50
2016 Q1	$6.65M	Buy	+194,500	New	+$7.68M	0.56%	58
2014 Q3	–	Sell	-41,250	Closed	-$2.08M	–	84
2014 Q2	$2.08M	Buy	41,250 +5,750	+16%	+$265K	0.37%	70
2014 Q1	$1.56M	Buy	35,500 +12,250	+53%	+$583K	0.36%	65
2013 Q4	$945K	Buy	+23,250	New	+$859K	0.34%	63

Other funds holding ALKS

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

BBA

Baker Bros. Advisors New York $20B AUM 154.41% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return

Renaissance Technologies New York $72.6B AUM 54.88% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

DTC

Deep Track Capital Greenwich, Connecticut $6.87B AUM 205.24% 1-Year Est. Return

Rock Springs Capital Management's ALKS Position: Q2 2026 in Review

Rock Springs Capital Management increased its Alkermes (ALKS) stake by 8.6% in Q2 2026, buying an estimated $618K and bringing the position to 199,811 shares worth $10.5M. The position accounts for 0.51% of the portfolio, ranked #54.

Rock Springs Capital Management first reported a position in ALKS in Q4 2013 and has held it in 13 quarters since. 424 funds tracked by Wall St. Rank hold ALKS as of Q2 2026.

Rock Springs Capital Management held 199,811 shares of Alkermes worth $10.5M as of Q2 2026.
Rock Springs Capital Management bought 15,825 Alkermes shares in Q2 2026, an estimated $618K.
Alkermes made up 0.51% of Rock Springs Capital Management's portfolio in Q2 2026, its #54 holding.
Rock Springs Capital Management first reported a position in Alkermes in Q4 2013 and has held it in 13 quarters since.
424 funds tracked by Wall St. Rank held Alkermes as of Q2 2026.

Based on Rock Springs Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.