Rock Springs Capital Management’s Insmed INSM Stock Holding History

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$51.4M	Sell	314,300 -4,950	-2%	-$761K	3.03%	7
2025 Q4	$55.6M	Sell	319,250 -65,750	-17%	-$12M	2.85%	9
2025 Q3	$55.4M	Sell	385,000 -140,000	-27%	-$17.2M	3.24%	8
2025 Q2	$52.8M	Buy	525,000 +9,100	+2%	+$696K	3.29%	5
2025 Q1	$39.4M	Sell	515,900 -34,100	-6%	-$2.61M	2.25%	14
2024 Q4	$38M	Sell	550,000 -133,344	-20%	-$9.6M	1.45%	23
2024 Q3	$49.9M	Sell	683,344 -125,012	-15%	-$9.23M	1.62%	21
2024 Q2	$54.2M	Buy	+808,356	New	+$31.4M	1.63%	20
2020 Q1	–	Sell	-800,000	Closed	-$19.1M	–	135
2019 Q4	$19.1M	Sell	800,000 -90,000	-10%	-$1.83M	0.6%	65
2019 Q3	$15.7M	Hold	890,000	–	–	0.63%	56
2019 Q2	$22.8M	Buy	890,000 +40,000	+5%	+$1.11M	0.83%	48
2019 Q1	$24.7M	Hold	850,000	–	–	0.96%	34
2018 Q4	$11.2M	Sell	850,000 -40,000	-4%	-$638K	0.53%	61
2018 Q3	$18M	Buy	890,000 +65,000	+8%	+$1.47M	0.65%	52
2018 Q2	$19.5M	Hold	825,000	–	–	0.75%	43
2018 Q1	$18.6M	Buy	825,000 +211,500	+34%	+$5.57M	0.79%	45
2017 Q4	$19.1M	Sell	613,500 -36,500	-6%	-$1.08M	0.87%	37
2017 Q3	$20.3M	Buy	650,000 +182,000	+39%	+$3.47M	0.94%	34
2017 Q2	$8.03M	Hold	468,000	–	–	0.41%	73
2017 Q1	$8.2M	Hold	468,000	–	–	0.47%	67
2016 Q4	$6.19M	Sell	468,000 -35,000	-7%	-$477K	0.41%	69
2016 Q3	$7.3M	Buy	503,000 +5,500	+1%	+$68.8K	0.46%	63
2016 Q2	$4.91M	Buy	497,500 +47,500	+11%	+$554K	0.36%	83
2016 Q1	$5.7M	Buy	450,000 +17,500	+4%	+$230K	0.48%	71
2015 Q4	$7.85M	Buy	432,500 +67,500	+18%	+$1.19M	0.6%	60
2015 Q3	$6.78M	Hold	365,000	–	–	0.55%	65
2015 Q2	$8.91M	Hold	365,000	–	–	0.65%	54
2015 Q1	$7.59M	Buy	+365,000	New	+$6.43M	0.71%	50