Latest Period
Q2 2026
Security Snapshot
HUDSON TECHNOLOGIES INC /NY - Common Stock (HDSN) Institutional Ownership
CUSIP: 444144109
13F Institutional Holders and Ownership History from Q1 2014 to Q2 2026
Institutions Reporting
151
Shares (Excl. Options)
31,605,645
Price
$5.74
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- Security type / class
- Equity / Common Stock
- Symbol
- HDSN on Nasdaq
- All holders as of 30 Jun 2026
- Q2 2026
- Total 13F shares
- 31,605,645
- Total 13F value
- $181,407,905
- Portfolio coverage rank
- 0%
- Share change
- -1,287,577
- Value change
- -$7,841,460
- Number of holders
- 151
- Shares outstanding
- 41,870,511
- SEC-reported price per share
- $5.67
- Insider filing price
- $5.67
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- HDSN - HUDSON TECHNOLOGIES INC /NY - Common Stock is tracked under CUSIP 444144109.
- 151 institutions reported positions in Q2 2026.
- 2 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 160 to 151 between Q1 2026 and Q2 2026.
- SEC-reported value moved from $193,620,546 to $181,407,905.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 151 institutions filings for Q2 2026.
Security key
444144109
Latest holder period
Q2 2026
13F holders
151
13D/G owners
2
CIK / CUSIP context first
Open Q2 2026 holders
HDSN full holder history
HUDSON TECHNOLOGIES INC /NY SEC filings
HUDSON TECHNOLOGIES INC /NY company facts
HUDSON TECHNOLOGIES INC /NY insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 444144109:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
2
Security
HDSN
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| Hartree Partners, LP | 12% | +31% | $27,093,596 | +$6,383,596 | 4,971,302 | +31% | Hartree Partners, LP | 30 Jun 2026 |
| DIMENSIONAL FUND ADVISORS LP | 4.7% | -8% | $11,295,630 | -$1,035,461 | 1,967,914 | -8.4% | Dimensional Fund Advisors LP | 30 Jun 2026 |
As of 30 Jun 2026, 151 institutional investors reported holding 31,605,645 shares of HUDSON TECHNOLOGIES INC /NY - Common Stock (HDSN). This represents 75% of the company’s total 41,870,511 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
63%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| Hartree Partners, LP | 11% | 4,411,889 | +16% | 5.5% | $25,324,243 |
| WESTERLY CAPITAL MANAGEMENT, LLC | 8.1% | 3,380,000 | +6.5% | 3.6% | $19,401,200 |
| BlackRock, Inc. | 6.8% | 2,840,272 | -0.78% | 0% | $16,303,161 |
| DIMENSIONAL FUND ADVISORS LP | 4.7% | 1,967,914 | -8.4% | 0% | $11,294,267 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4% | 1,654,259 | -0.35% | 0% | $9,495,447 |
| RENAISSANCE TECHNOLOGIES LLC | 3.4% | 1,442,115 | -4.1% | 0.01% | $8,277,740 |
| AMERICAN CENTURY COMPANIES INC | 2.8% | 1,169,462 | -21% | 0% | $6,712,712 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.4% | 995,011 | +4.9% | 0% | $5,712,680 |
| STATE STREET CORP | 2.1% | 895,776 | -0.23% | 0% | $5,141,754 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 1.9% | 777,989 | -12% | 0% | $4,465,657 |
| CASPIAN CAPITAL LP | 1.7% | 728,306 | 0% | 2.4% | $4,180,476 |
| Qube Research & Technologies Ltd | 1.7% | 721,847 | +95% | 0% | $4,143,402 |
| CITADEL ADVISORS LLC | 1.4% | 574,266 | +39% | 0% | $3,296,287 |
| JACOBS LEVY EQUITY MANAGEMENT, INC | 1.2% | 506,591 | +183% | 0.01% | $2,907,832 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 1.2% | 494,432 | -0.74% | 0.05% | $2,838,040 |
| Nuveen, LLC | 1.1% | 476,540 | +469% | 0% | $2,735,340 |
| MARSHALL WACE, LLP | 1.1% | 474,354 | +116% | 0% | $2,722,791 |
| D. E. Shaw & Co., Inc. | 0.98% | 409,591 | +14% | 0% | $2,351,052 |
| MORGAN STANLEY | 0.88% | 367,159 | -22% | 0% | $2,107,493 |
| Russell Investments Group, Ltd. | 0.87% | 362,489 | +135% | 0% | $2,080,683 |
| 683 Capital Management, LLC | 0.78% | 325,000 | 0% | 0.17% | $1,865,500 |
| JB CAPITAL PARTNERS LP | 0.73% | 306,200 | 0% | 0.27% | $1,757,588 |
| Ancora Advisors LLC | 0.72% | 303,380 | 0.03% | $1,741,401 | |
| Kerrisdale Advisers, LLC | 0.72% | 299,976 | +421% | 0.43% | $1,721,862 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 0.69% | 290,537 | +8.2% | 0% | $1,667,682 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
50
Latest
Q2 2026
Rows shown
1-25 of 50
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q2 | 31,605,645 | $181,407,905 | -$7,841,460 | $5.74 | 151 |
| 2026 Q1 | 32,926,022 | $193,620,546 | -$750,784 | $5.88 | 160 |
| 2025 Q4 | 32,978,611 | $226,419,148 | -$7,830,042 | $6.85 | 167 |
| 2025 Q3 | 33,289,262 | $330,436,912 | +$2,930,047 | $9.93 | 169 |
| 2025 Q2 | 33,386,741 | $271,102,559 | +$17,244,448 | $8.12 | 148 |
| 2025 Q1 | 31,547,556 | $194,780,723 | +$9,817,038 | $6.17 | 160 |
| 2024 Q4 | 30,331,793 | $169,600,332 | -$12,169,893 | $5.58 | 168 |
| 2024 Q3 | 30,810,520 | $256,779,695 | -$8,864,193 | $8.34 | 171 |
| 2024 Q2 | 31,738,325 | $278,980,715 | -$9,568,179 | $8.79 | 159 |
| 2024 Q1 | 31,441,748 | $346,171,265 | +$6,974,457 | $11.01 | 166 |
| 2023 Q4 | 30,952,856 | $417,524,721 | +$18,164,543 | $13.49 | 144 |
| 2023 Q3 | 29,618,399 | $393,957,523 | +$13,018,643 | $13.30 | 143 |
| 2023 Q2 | 28,909,459 | $278,109,488 | +$10,462,748 | $9.62 | 132 |
| 2023 Q1 | 27,958,359 | $244,021,884 | +$1,006,498 | $8.73 | 137 |
| 2022 Q4 | 28,038,283 | $283,731,486 | -$3,066,577 | $10.12 | 141 |
| 2022 Q3 | 28,557,028 | $209,894,435 | -$1,233,313 | $7.35 | 130 |
| 2022 Q2 | 28,806,235 | $216,337,819 | +$27,891,788 | $7.51 | 109 |
| 2022 Q1 | 25,345,793 | $157,392,239 | +$19,722,541 | $6.21 | 76 |
| 2021 Q4 | 22,322,359 | $99,105,146 | +$7,517,506 | $4.44 | 64 |
| 2021 Q3 | 18,490,004 | $65,332,247 | +$6,330,092 | $3.53 | 59 |
| 2021 Q2 | 16,730,700 | $56,888,332 | +$7,893,631 | $3.40 | 50 |
| 2021 Q1 | 14,847,707 | $23,906,086 | -$66,964 | $1.61 | 34 |
| 2020 Q4 | 14,958,207 | $16,306,761 | -$890,248 | $1.09 | 33 |
| 2020 Q3 | 15,772,302 | $18,134,803 | +$187,649 | $1.15 | 30 |
| 2020 Q2 | 15,612,649 | $15,772,705 | -$963,167 | $1.01 | 31 |