Rock Springs Capital Management’s Gossamer Bio GOSS Stock Holding History

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$529K	Sell	1,609,492 -1,657,468	-51%	-$2.61M	0.03%	97
2025 Q4	$10.1M	Hold	3,266,960	–	–	0.52%	53
2025 Q3	$8.59M	Hold	3,266,960	–	–	0.5%	55
2025 Q2	$4.02M	Hold	3,266,960	–	–	0.25%	68
2025 Q1	$3.59M	Hold	3,266,960	–	–	0.21%	70
2024 Q4	$2.96M	Hold	3,266,960	–	–	0.11%	87
2024 Q3	$3.22M	Hold	3,266,960	–	–	0.1%	92
2024 Q2	$2.94M	Hold	3,266,960	–	–	0.09%	95
2024 Q1	$3.86M	Hold	3,266,960	–	–	0.1%	97
2023 Q4	$2.98M	Hold	3,266,960	–	–	0.07%	91
2023 Q3	$2.72M	Buy	3,266,960 +2,166,686	+197%	+$2.5M	0.07%	93
2023 Q2	$1.32M	Hold	1,100,274	–	–	0.03%	112
2023 Q1	$1.39M	Buy	1,100,274 +724,226	+193%	+$1.39M	0.03%	110
2022 Q4	$816K	Sell	376,048 -1,210,914	-76%	-$9.97M	0.02%	115
2022 Q3	$19M	Buy	+1,586,962	New	+$19.7M	0.49%	56