Hudson Technologies
HDSN
170 hedge funds and large institutions have $330M invested in Hudson Technologies in 2025 Q3 according to their latest regulatory filings, with 43 funds opening new positions, 44 increasing their positions, 50 reducing their positions, and 19 closing their positions.
747% more call options, than puts
Call options by funds: $1.01M | Put options by funds: $119K
126% more first-time investments, than exits
New positions opened: 43 | Existing positions closed: 19
22% more capital invested
Capital invested by funds: $271M → $330M (+$59.7M)
15% more funds holding
Funds holding: 148 → 170 (+22)
0% more funds holding in top 10
Funds holding in top 10: 2 → 2 (0)
0.47% less ownership
Funds ownership: 76.66% → 76.18% (-0.47%)
12% less repeat investments, than reductions
Existing positions increased: 44 | Existing positions reduced: 50
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Los Angeles Capital Management
Los Angeles,
California
|
+$2.17M |
| 2 |
Acadian Asset Management
Boston,
Massachusetts
|
+$1.99M |
| 3 |
Tudor Investment Corp
Stamford,
Connecticut
|
+$1.95M |
| 4 |
CSS
Cubist Systematic Strategies
Stamford,
Connecticut
|
+$1.93M |
| 5 |
American Century Companies
Kansas City,
Missouri
|
+$1.89M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Janus Henderson Group
London,
|
-$4.72M |
| 2 |
OCM
Oaktree Capital Management
Los Angeles,
California
|
-$4.57M |
| 3 |
Susquehanna International Group
Bala Cynwyd,
Pennsylvania
|
-$2.43M |
| 4 |
HP
Hartree Partners
New York
|
-$1.88M |
| 5 |
Two Sigma Advisers
New York
|
-$1.56M |
HDSN Hedge Fund Activity: Q3 2025 in Review
170 of the 7,641 institutional investors tracked by Wall St. Rank reported a position in Hudson Technologies (HDSN) for Q3 2025, worth a combined $330M — up 22% from $271M a quarter earlier.
Buyers outnumbered sellers: 43 funds opened new HDSN positions and 19 closed out — a net gain of 24 holders — while 44 added to existing stakes and 50 trimmed.
The largest buyer was Los Angeles Capital Management, opening a new position worth an estimated $2.17M. The largest seller was Janus Henderson Group, exiting entirely with an estimated $4.72M sold.
- 170 institutional investors held Hudson Technologies (HDSN) as of Q3 2025, up from 148 in Q2 2025.
- Funds reported $330M of Hudson Technologies stock for Q3 2025, up 22% quarter-over-quarter.
- 43 funds opened new Hudson Technologies positions in Q3 2025 and 19 closed out, a net change of +24 holders.
- The largest Hudson Technologies buyer in Q3 2025 was Los Angeles Capital Management, an estimated $2.17M added.
- The largest Hudson Technologies seller in Q3 2025 was Janus Henderson Group, an estimated $4.72M sold.
Based on aggregated 13F filings for Q3 2025.