Security key
444144109
HUDSON TECHNOLOGIES INC /NY - Common Stock (HDSN)
CUSIP: 444144109
Q2 2026 13F Holders as of 30 Jun 2026
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 5,674,691
- Total 13F value
- $32,582,800
- Share change
- -207,764
- SEC-reported price per share
- $5.74
- Number of holders
- 50
- Value change
- -$1,261,249
- Number of buys
- 25
- Number of sells
- 27
- Shares outstanding
- 41,870,511
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q2 2026
Institutions
50
Top holders
10
HDSN full security history
Ownership snapshot
Full 13F holder table
HUDSON TECHNOLOGIES INC /NY SEC filings
HUDSON TECHNOLOGIES INC /NY company facts
Broader feeds
Reporting periods
Holder history for CUSIP 444144109
Recent filing periods:
Ownership snapshot
Top reported holders of HDSN - HUDSON TECHNOLOGIES INC /NY - Common Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Hartree Partners, LP
Disclosed value leader
Hartree Partners, LP
Comparable rows
15/15
Latest evidence
30 Jun 2026
13D/G
13F
3/4/5
Lead comparable stake: 12%
13D/G row: Hartree Partners, LP
Showing 1-6 of 15 holder rows.
Quick read
Hartree Partners, LP leads the comparable SEC ownership view at 12%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Hartree Partners, LP's linked filing trail.
Comparable ownership
Top 5
Hartree Partners, LP
12%
WESTERLY CAPITAL MANAGEMENT, LLC
5.9%
DIMENSIONAL FUND ADVISORS LP
4.7%
Vincent P. Abbatecola
0.41%
Kathleen Houghton
0.38%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Hartree Partners, LP |
13D/G
13F
Company
|
12%
|
$27,093,596
4,971,302 shares
|
+$6,383,596 | 30 Jun 2026 |
| WESTERLY CAPITAL MANAGEMENT, LLC |
13F
13D/G
Company
|
5.9%
from 13D/G
|
$18,669,000
3,175,000 shares
|
— | 31 Mar 2026 |
| DIMENSIONAL FUND ADVISORS LP |
13F
13D/G
Company
|
4.7%
from 13D/G
|
$12,631,109
2,148,311 shares
|
— | 31 Mar 2026 |
| Vincent P. Abbatecola |
3/4/5
Director
|
0.41%
|
$1,151,740
169,748 shares
|
+$23,748 | 17 Nov 2025 |
| Kathleen Houghton |
3/4/5
Sr. VP-Sales and Marketing, Director
|
0.38%
|
$1,126,187
158,618 shares
|
— | 08 Jan 2026 |
| Robert Stoody |
3/4/5
Senior VP - Operations
|
0.17%
|
$479,821
70,047 shares
|
— | 30 Jan 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q2 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
50
Shares
5,674,691
Rows available
50
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q2 2026 vs Q1 2026 Across Filers
Q1 2026 holders
160
Q2 2026 holders
50
Holder diff
-110
| Investor | Q1 2026 Shares | Q2 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q2 2026 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend