Latest Period
Q1 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
160
Shares (Excl. Options)
32,926,022
Price
$5.88
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- Security type / class
- Equity / Common Stock
- Symbol
- HDSN on Nasdaq
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 32,926,022
- Total 13F value
- $193,620,546
- Portfolio coverage rank
- 0%
- Share change
- +173,840
- Value change
- -$750,515
- Number of holders
- 160
- Shares outstanding
- 41,870,511
- SEC-reported price per share
- $5.74
- Insider filing price
- $5.74
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.
- 160 institutions reported positions in Q1 2026.
- 2 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 160 to 22 between Q1 2026 and Q2 2026.
- SEC-reported value moved from $193,620,546 to $3,294,665.
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 160 institutions filings for Q1 2026.
Security key
444144109
Latest holder period
Q1 2026
13F holders
160
13D/G owners
2
CIK / CUSIP context first
Open Q1 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 31 Mar 2026, 160 institutional investors reported holding 32,926,022 shares of HUDSON TECHNOLOGIES INC /NY - Common Stock (HDSN). This represents 79% 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 | 9.1% | 3,800,000 | 0% | 4.8% | $22,344,000 |
| WESTERLY CAPITAL MANAGEMENT, LLC | 7.6% | 3,175,000 | +25% | 5.8% | $18,669,000 |
| BlackRock, Inc. | 6.8% | 2,862,539 | -1.8% | 0% | $16,831,729 |
| DIMENSIONAL FUND ADVISORS LP | 5.1% | 2,148,311 | +5.1% | 0% | $12,631,109 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4% | 1,660,146 | 0% | 0% | $9,761,658 |
| RENAISSANCE TECHNOLOGIES LLC | 3.6% | 1,504,250 | -11% | 0.01% | $8,844,990 |
| AMERICAN CENTURY COMPANIES INC | 3.6% | 1,487,774 | +7.3% | 0% | $8,748,111 |
| NEW SOUTH CAPITAL MANAGEMENT INC | 3% | 1,241,223 | -3.3% | 0.35% | $7,298,391 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.3% | 948,546 | +0.57% | 0% | $5,578,712 |
| STATE STREET CORP | 2.1% | 897,873 | +0.43% | 0% | $5,279,493 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 2.1% | 881,235 | -10% | 0% | $5,181,662 |
| CASPIAN CAPITAL LP | 1.7% | 728,306 | 0% | 4.2% | $4,282,439 |
| SEGALL BRYANT & HAMILL, LLC | 1.5% | 628,341 | +248% | 0.05% | $3,694,645 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 1.2% | 498,109 | +32% | 0.06% | $2,928,881 |
| MORGAN STANLEY | 1.1% | 471,947 | -33% | 0% | $2,775,047 |
| CITADEL ADVISORS LLC | 0.99% | 412,750 | +415% | 0% | $2,426,970 |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO | 0.98% | 410,099 | 0% | 0.01% | $2,411,382 |
| NORTHERN TRUST CORP | 0.95% | 399,363 | +1.9% | 0% | $2,348,253 |
| Qube Research & Technologies Ltd | 0.89% | 370,876 | +127% | 0% | $2,180,751 |
| D. E. Shaw & Co., Inc. | 0.86% | 358,682 | -38% | 0% | $2,109,050 |
| AQR CAPITAL MANAGEMENT LLC | 0.82% | 344,304 | +1.5% | 0% | $2,024,507 |
| LAZARD ASSET MANAGEMENT LLC | 0.78% | 325,915 | -25% | 0% | $1,916,380 |
| 683 Capital Management, LLC | 0.78% | 325,000 | -3% | 0.18% | $1,911,000 |
| JB CAPITAL PARTNERS LP | 0.73% | 306,200 | 0% | 0.31% | $1,800,456 |
| Bank of New York Mellon Corp | 0.67% | 282,435 | -13% | 0% | $1,660,717 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
50
Latest
Q1 2026
Rows shown
1-25 of 50
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q2 | 572,251 | $3,294,665 | -$1,276,170 | $5.74 | 22 |
| 2026 Q1 | 32,926,022 | $193,620,546 | -$750,515 | $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 |