Hudson Technologies
HDSN
162 hedge funds and large institutions have $195M invested in Hudson Technologies in 2025 Q1 according to their latest regulatory filings, with 26 funds opening new positions, 51 increasing their positions, 60 reducing their positions, and 31 closing their positions.
400% more call options, than puts
Call options by funds: $690K | Put options by funds: $138K
100% more funds holding in top 10
Funds holding in top 10: 1 → 2 (+1)
15% more capital invested
Capital invested by funds: $170M → $195M (+$25.3M)
4.59% more ownership
Funds ownership: 67.11% → 71.7% (+4.6%)
4% less funds holding
Funds holding: 168 → 162 (-6)
15% less repeat investments, than reductions
Existing positions increased: 51 | Existing positions reduced: 60
16% less first-time investments, than exits
New positions opened: 26 | Existing positions closed: 31
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
HP
Hartree Partners
New York
|
+$21M |
| 2 |
Two Sigma Advisers
New York
|
+$1.73M |
| 3 |
Arrowstreet Capital
Boston,
Massachusetts
|
+$1.39M |
| 4 |
WCM
Westerly Capital Management
San Francisco,
California
|
+$1.22M |
| 5 |
Two Sigma Investments
New York
|
+$1.09M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Lazard Asset Management
New York
|
-$2.82M |
| 2 |
PP
Praetorian PR
Rincon,
Puerto Rico
|
-$2.23M |
| 3 |
Citadel Advisors
Miami,
Florida
|
-$1.68M |
| 4 |
6CM
683 Capital Management
New York
|
-$1.37M |
| 5 |
Qube Research & Technologies (QRT)
London,
United Kingdom
|
-$1.35M |
HDSN Hedge Fund Activity: Q1 2025 in Review
162 of the 7,472 institutional investors tracked by Wall St. Rank reported a position in Hudson Technologies (HDSN) for Q1 2025, worth a combined $195M — up 15% from $170M a quarter earlier.
Sellers outnumbered buyers: 31 funds closed out of HDSN and 26 opened new positions — a net loss of 5 holders — while 60 trimmed existing stakes and 51 added.
The largest buyer was Hartree Partners, opening a new position worth an estimated $21M. The largest seller was Lazard Asset Management, cutting an estimated $2.82M.
- 162 institutional investors held Hudson Technologies (HDSN) as of Q1 2025, down from 168 in Q4 2024.
- Funds reported $195M of Hudson Technologies stock for Q1 2025, up 15% quarter-over-quarter.
- 26 funds opened new Hudson Technologies positions in Q1 2025 and 31 closed out, a net change of -5 holders.
- The largest Hudson Technologies buyer in Q1 2025 was Hartree Partners, an estimated $21M added.
- The largest Hudson Technologies seller in Q1 2025 was Lazard Asset Management, an estimated $2.82M sold.
Based on aggregated 13F filings for Q1 2025.