Hudson Technologies
HDSN
148 hedge funds and large institutions have $271M invested in Hudson Technologies in 2025 Q2 according to their latest regulatory filings, with 21 funds opening new positions, 44 increasing their positions, 58 reducing their positions, and 35 closing their positions.
142,800% more call options, than puts
Call options by funds: $5.72M | Put options by funds: $4K
39% more capital invested
Capital invested by funds: $195M → $271M (+$75.7M)
4.96% more ownership
Funds ownership: 71.7% → 76.66% (+5%)
0% more funds holding in top 10
Funds holding in top 10: 2 → 2 (0)
9% less funds holding
Funds holding: 162 → 148 (-14)
24% less repeat investments, than reductions
Existing positions increased: 44 | Existing positions reduced: 58
40% less first-time investments, than exits
New positions opened: 21 | Existing positions closed: 35
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Royal Bank of Canada
Toronto,
Ontario, Canada
|
+$5.53M |
| 2 |
WCM
Westerly Capital Management
San Francisco,
California
|
+$5.32M |
| 3 |
Arrowstreet Capital
Boston,
Massachusetts
|
+$3.87M |
| 4 |
OCM
Oaktree Capital Management
Los Angeles,
California
|
+$3.86M |
| 5 |
Janus Henderson Group
London,
United Kingdom
|
+$3.54M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
D.E. Shaw & Co
New York
|
-$3.43M |
| 2 |
JP Morgan Chase
New York
|
-$3.32M |
| 3 |
GC
Grizzlyrock Capital
Chicago,
Illinois
|
-$2.68M |
| 4 |
BlackRock
New York
|
-$1.81M |
| 5 |
AQR Capital Management
Greenwich,
Connecticut
|
-$1.79M |
HDSN Hedge Fund Activity: Q2 2025 in Review
148 of the 7,596 institutional investors tracked by Wall St. Rank reported a position in Hudson Technologies (HDSN) for Q2 2025, worth a combined $271M — up 39% from $195M a quarter earlier.
Sellers outnumbered buyers: 35 funds closed out of HDSN and 21 opened new positions — a net loss of 14 holders — while 58 trimmed existing stakes and 44 added.
The largest buyer was Royal Bank of Canada, adding an estimated $5.53M. The largest seller was D.E. Shaw & Co, cutting an estimated $3.43M.
- 148 institutional investors held Hudson Technologies (HDSN) as of Q2 2025, down from 162 in Q1 2025.
- Funds reported $271M of Hudson Technologies stock for Q2 2025, up 39% quarter-over-quarter.
- 21 funds opened new Hudson Technologies positions in Q2 2025 and 35 closed out, a net change of -14 holders.
- The largest Hudson Technologies buyer in Q2 2025 was Royal Bank of Canada, an estimated $5.53M added.
- The largest Hudson Technologies seller in Q2 2025 was D.E. Shaw & Co, an estimated $3.43M sold.
Based on aggregated 13F filings for Q2 2025.