Rock Springs Capital Management’s Pulmonx LUNG Stock Holding History

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

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q3	–	Sell	-651,100	Closed	-$1.69M	–	98
2025 Q2	$1.69M	Buy	651,100 +147,400	+29%	+$581K	0.11%	79
2025 Q1	$3.39M	Sell	503,700 -268,451	-35%	-$1.9M	0.19%	71
2024 Q4	$5.24M	Buy	772,151 +80,851	+12%	+$532K	0.2%	76
2024 Q3	$5.73M	Buy	691,300 +38,900	+6%	+$281K	0.19%	82
2024 Q2	$4.14M	Hold	652,400	–	–	0.12%	90
2024 Q1	$6.05M	Hold	652,400	–	–	0.15%	88
2023 Q4	$8.32M	Hold	652,400	–	–	0.2%	74
2023 Q3	$6.74M	Hold	652,400	–	–	0.18%	78
2023 Q2	$8.55M	Hold	652,400	–	–	0.2%	80
2023 Q1	$7.29M	Hold	652,400	–	–	0.17%	82
2022 Q4	$5.5M	Buy	652,400 +55,000	+9%	+$523K	0.13%	84
2022 Q3	$9.95M	Sell	597,400 -105,000	-15%	-$1.93M	0.26%	79
2022 Q2	$10.3M	Hold	702,400	–	–	0.3%	77
2022 Q1	$17.4M	Buy	702,400 +2,400	+0.3%	+$62K	0.44%	63
2021 Q4	$22.4M	Hold	700,000	–	–	0.52%	61
2021 Q3	$25.2M	Buy	700,000 +107,500	+18%	+$4.23M	0.53%	61
2021 Q2	$26.1M	Hold	592,500	–	–	0.52%	59
2021 Q1	$27.1M	Buy	592,500 +92,500	+19%	+$5.31M	0.59%	59
2020 Q4	$34.5M	Buy	+500,000	New	+$24.5M	0.73%	47

Other funds holding LUNG

Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return

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

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

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

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

SAM

Silvercrest Asset Management New York $13.8B AUM 28.39% 1-Year Est. Return

Deutsche Bank Frankfurt Am Main Ge, Germany $303B AUM 30.15% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

KLP

Kent Lake PR Anasco, Puerto Rico $198M AUM 5.21% 1-Year Est. Return

VPC

Vestal Point Capital New York $3.58B AUM 189.12% 1-Year Est. Return

Rock Springs Capital Management's LUNG Position: Q3 2025 in Review

Rock Springs Capital Management sold out of Pulmonx (LUNG) in Q3 2025, closing a stake of 651,100 shares — an estimated $1.69M sold.

Rock Springs Capital Management first reported a position in LUNG in Q4 2020 and held it in 19 quarters. The position peaked at $34.5M in Q4 2020. 107 funds tracked by Wall St. Rank hold LUNG as of Q3 2025.

Rock Springs Capital Management reported no remaining Pulmonx position as of Q3 2025 after selling out during the quarter.
Rock Springs Capital Management sold 651,100 Pulmonx shares in Q3 2025, an estimated $1.69M.
Rock Springs Capital Management first reported a position in Pulmonx in Q4 2020 and held it in 19 quarters.
Rock Springs Capital Management's Pulmonx position peaked at $34.5M in Q4 2020.
107 funds tracked by Wall St. Rank held Pulmonx as of Q3 2025.

Based on Rock Springs Capital Management's 13F filing for Q3 2025, filed 14 Nov 2025.