Pulmonx
LUNG
107 hedge funds and large institutions have $51.6M invested in Pulmonx in 2025 Q3 according to their latest regulatory filings, with 20 funds opening new positions, 34 increasing their positions, 30 reducing their positions, and 26 closing their positions.
1,250% more call options, than puts
Call options by funds: $54K | Put options by funds: $4K
13% more repeat investments, than reductions
Existing positions increased: 34 | Existing positions reduced: 30
5% less funds holding
Funds holding: 113 → 107 (-6)
11.93% less ownership
Funds ownership: 90.06% → 78.13% (-12%)
23% less first-time investments, than exits
New positions opened: 20 | Existing positions closed: 26
45% less capital invested
Capital invested by funds: $93.9M → $51.6M (-$42.3M)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
KLP
Kent Lake PR
Anasco,
Puerto Rico
|
+$1.94M |
| 2 |
VPC
Vestal Point Capital
New York
|
+$1.74M |
| 3 |
SCM
Stonepine Capital Management
Bend,
Oregon
|
+$1.1M |
| 4 |
SAM
Silvercrest Asset Management
New York
|
+$698K |
| 5 |
GCP
GSA Capital Partners
London,
United Kingdom
|
+$694K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
DM
Deerfield Management
New York
|
-$4.9M |
| 2 |
Fidelity Investments
Boston,
Massachusetts
|
-$4.37M |
| 3 |
BNP Paribas Asset Management
Paris,
France
|
-$3.03M |
| 4 |
Millennium Management
New York
|
-$1.74M |
| 5 |
RSCM
Rock Springs Capital Management
Baltimore,
Maryland
|
-$1.69M |
LUNG Hedge Fund Activity: Q3 2025 in Review
107 of the 7,621 institutional investors tracked by Wall St. Rank reported a position in Pulmonx (LUNG) for Q3 2025, worth a combined $51.6M — down 45% from $93.9M a quarter earlier.
Sellers outnumbered buyers: 26 funds closed out of LUNG and 20 opened new positions — a net loss of 6 holders — while 30 trimmed existing stakes and 34 added.
The largest buyer was Kent Lake PR, opening a new position worth an estimated $1.94M. The largest seller was Deerfield Management, exiting entirely with an estimated $4.9M sold.
- 107 institutional investors held Pulmonx (LUNG) as of Q3 2025, down from 113 in Q2 2025.
- Funds reported $51.6M of Pulmonx stock for Q3 2025, down 45% quarter-over-quarter.
- 20 funds opened new Pulmonx positions in Q3 2025 and 26 closed out, a net change of -6 holders.
- The largest Pulmonx buyer in Q3 2025 was Kent Lake PR, an estimated $1.94M added.
- The largest Pulmonx seller in Q3 2025 was Deerfield Management, an estimated $4.9M sold.
Based on aggregated 13F filings for Q3 2025.