HUDSON TECHNOLOGIES INC /NY - Common Stock, par value $0.01 (HDSN) Institutional Ownership

13F Institutional Holders and Ownership History from Q1 2014 to Q4 2025

Type / Class
Equity / Common Stock, par value $0.01
Symbol
HDSN on Nasdaq
Shares outstanding
43,678,161
Price per share
$6.85
All holders as of 30 Sep 2025
Q3 2025
Total 13F shares
33,289,235
Total reported value
$330,436,644
% of total 13F portfolios
0%
Share change
-28,407
Value change
+$2,929,779
Number of holders
168
Price from insider filings
$6.85
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of HUDSON TECHNOLOGIES INC /NY - Common Stock, par value $0.01 (HDSN) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
Hartree Partners, LP 8.7% -4.4% $26,030,000 -$1,370,000 3,800,000 -5% Hartree Partners, LP 08 Dec 2025
WESTERLY CAPITAL MANAGEMENT, LLC 6% $16,198,000 2,600,000 WESTERLY CAPITAL MANAGEMENT, LLC 16 Jun 2025

As of 30 Sep 2025, 168 institutional investors reported holding 33,289,235 shares of HUDSON TECHNOLOGIES INC /NY - Common Stock, par value $0.01 (HDSN). This represents 76% of the company’s total 43,678,161 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of HUDSON TECHNOLOGIES INC /NY - Common Stock, par value $0.01 (HDSN) together control 60% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.

Institution Ownership % Shares Held Share Change % Portfolio % Holdings Value
Hartree Partners, LP 8.7% 3,800,000 -5% 13% $37,734,000
BlackRock, Inc. 6.6% 2,863,273 -1.5% 0% $28,432,300
VANGUARD GROUP INC 5.4% 2,373,181 -4.3% 0% $23,565,687
DIMENSIONAL FUND ADVISORS LP 4.6% 2,009,481 +0.13% 0% $19,952,826
WESTERLY CAPITAL MANAGEMENT, LLC 4.3% 1,890,000 -5.5% 6% $18,767,700
RENAISSANCE TECHNOLOGIES LLC 4.1% 1,796,850 +7.5% 0.02% $17,842,721
NEW SOUTH CAPITAL MANAGEMENT INC 3.1% 1,334,337 -1.2% 0.6% $13,249,966
AMERICAN CENTURY COMPANIES INC 2.9% 1,273,890 +19% 0.01% $12,649,728
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 2.5% 1,111,803 0% 0.01% $11,040,204
GEODE CAPITAL MANAGEMENT, LLC 2.2% 954,426 +1.1% 0% $9,479,584
STATE STREET CORP 2% 893,855 -5.3% 0% $8,875,980
D. E. Shaw & Co., Inc. 1.9% 821,809 +3.8% 0.01% $8,160,564
ROYAL BANK OF CANADA 1.8% 802,872 -4.2% 0% $7,973,000
MORGAN STANLEY 1.8% 792,727 +4.9% 0% $7,871,779
NORTHERN TRUST CORP 0.95% 416,507 -3.1% 0% $4,135,915
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO 0.94% 410,099 0% 0.01% $4,072,283
BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.83% 360,648 +21% 0.08% $3,581,235
MILLENNIUM MANAGEMENT LLC 0.81% 355,958 -24% 0% $3,534,663
683 Capital Management, LLC 0.8% 350,000 -6.7% 0.32% $3,475,500
AQR CAPITAL MANAGEMENT LLC 0.79% 345,284 +4.3% 0% $3,428,671
Bank of New York Mellon Corp 0.77% 338,390 +0.5% 0% $3,360,213
JB CAPITAL PARTNERS LP 0.7% 306,200 0% 0.52% $3,040,566
BANK OF AMERICA CORP /DE/ 0.64% 279,172 +60% 0% $2,772,178
LAZARD ASSET MANAGEMENT LLC 0.6% 260,805 +223% 0% $2,589,794
LOS ANGELES CAPITAL MANAGEMENT LLC 0.53% 231,192 0.01% $2,295,737

Institutional Holders of HUDSON TECHNOLOGIES INC /NY - Common Stock, par value $0.01 (HDSN) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2025 Q4 341,183 $2,338,237 -$1,503,970 $6.85 14
2025 Q3 33,289,235 $330,436,644 +$2,929,779 $9.93 168
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
2020 Q1 16,589,285 $11,438,481 -$913,811 $0.69 31
2019 Q4 17,646,293 $17,248,683 -$1,323,571 $0.98 40
2019 Q3 19,020,148 $13,503,017 -$5,782,600 $0.71 41
2019 Q2 25,770,005 $22,154,551 -$635,497 $0.86 46
2019 Q1 26,448,140 $51,047,118 -$1,577,708 $1.93 45
2018 Q4 27,375,092 $24,362,566 -$3,487,127 $0.89 51
2018 Q3 30,415,264 $38,929,864 -$5,385,607 $1.28 62
2018 Q2 32,664,857 $65,655,819 -$20,518,949 $2.01 79
2018 Q1 33,537,160 $165,663,293 +$9,172,258 $4.94 107
2017 Q4 32,257,862 $195,885,223 -$5,627,032 $6.07 112
2017 Q3 32,089,859 $250,650,094 +$2,870,506 $7.81 124
2017 Q2 31,511,938 $266,271,733 +$17,652,028 $8.45 122
2017 Q1 30,018,613 $198,519,280 +$13,453,827 $6.60 110
2016 Q4 28,166,467 $225,308,626 +$57,719,608 $8.01 117
2016 Q3 17,847,888 $118,689,000 +$12,232,345 $6.65 53
2016 Q2 19,273,287 $69,374,210 +$892,231 $3.60 40
2016 Q1 19,052,624 $62,487,000 +$1,132,292 $3.28 40
2015 Q4 18,710,113 $55,545,000 -$181,447 $2.97 41
2015 Q3 18,771,663 $55,743,000 -$8,324,755 $2.97 45
2015 Q2 18,464,091 $64,432,607 +$110,852 $3.49 45
2015 Q1 18,348,680 $76,455,378 +$2,782,739 $4.17 47
2014 Q4 17,716,806 $66,733,991 +$3,473,796 $3.77 51
2014 Q3 16,830,736 $55,679,000 -$3,550,835 $3.31 37
2014 Q2 17,800,745 $51,427,289 +$19,075,020 $2.89 37
2014 Q1 11,228,781 $31,469,326 +$1,338,968 $2.80 34