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Hartree Partners, LP, a ten percent owner of Hudson Technologies, reported purchases totaling 65,550 shares of common stock on July 20-21, 2026. It bought 17,842 shares at a weighted average price of $5.9892 and 47,708 shares at $5.9894 per share, with individual trades between $5.9850 and $5.9900. Hartree disclaims beneficial ownership beyond its pecuniary interest, and the trades were not indicated as made under a Rule 10b5-1 trading plan.
Dimensional Fund Advisors LP, a Delaware limited partnership and registered investment adviser, reports beneficial ownership of 1,967,914 shares of Hudson Technologies Inc common stock, representing 4.7% of the class. The position is reported as ownership of 5 percent or less of the outstanding common stock.
Dimensional has sole voting power over 1,922,611 shares and sole dispositive power over 1,967,914 shares, with no shared voting or dispositive power. All securities are owned by underlying funds and accounts for which Dimensional or its subsidiaries provide investment management. Dimensional states that it may be deemed a beneficial owner for Section 13(d) purposes but disclaims beneficial ownership of these securities and notes that, to its knowledge, no single underlying fund holds more than 5% of the class.
Hartree Partners, LP, a 10% owner of HUDSON TECHNOLOGIES INC /NY, reported open-market purchases of common stock. It bought 4,634 shares on July 6, 2026 and 600 shares on July 7, 2026, both at $5.99 per share, for a total of 5,234 shares. After these trades, Hartree Partners directly held 4,976,536 shares. The filer disclaims beneficial ownership beyond its pecuniary interest in these securities.
Hartree Partners, LP, a more than ten percent owner of Hudson Technologies Inc., reported a series of open-market purchases of the company’s common stock. Over June 30 to July 2, 2026, Hartree bought a total of 764,202 shares at weighted average prices between roughly $5.68 and $5.97 per share. After these transactions, Hartree directly holds 4,971,302 shares of Hudson Technologies common stock. The filing notes that prices are reported as weighted averages across multiple trades within stated ranges and that Hartree disclaims beneficial ownership beyond its pecuniary interest.
Hartree Partners, LP filed an initial ownership report for Hudson Technologies Inc. (HDSN), stating it holds 4,207,100 shares of common stock. This filing reflects that Hartree is a more than ten percent owner. The footnote explains Hartree disclaims beneficial ownership beyond its economic interest in these securities.
Hudson Technologies Inc. Schedule 13G/A amendment reports that Hartree Partners beneficially owned 4,971,302 shares of Hudson Technologies common stock, representing 11.8% of the class as of 06/30/2026. The filing shows Hartree holds sole voting and dispositive power over the same 4,971,302 shares.
HUDSON TECHNOLOGIES INC /NY director Alan Sheriff reported equity awards in the form of common stock and stock options. He received 3,219 shares of Common Stock as a grant at no cash cost, increasing his direct holdings to 12,484 common shares after the award.
He was also granted 15,360 Stock Options exercisable for an equal number of common shares at a strike price of $5.63 per share, with an expiration date on June 17, 2029. These awards are compensation-related acquisitions, not open‑market purchases or sales.
Prouty Eric A reported acquisition or exercise transactions in this Form 4 filing.
HUDSON TECHNOLOGIES INC /NY director Eric A. Prouty received equity compensation. On June 17, 2026, he was granted 4,440 shares of Common Stock at no cost and 21,186 stock options exercisable at $5.63 per share, expiring on June 17, 2029. After these awards, he directly holds 158,292 Common shares and 21,186 options.
HUDSON TECHNOLOGIES INC /NY director Richard Parrillo received a grant of stock options covering 31,780 shares of common stock. The options were awarded at an exercise price of $5.63 per share, have no cost at grant, and are scheduled to expire on June 17, 2029. Following this compensation-related award, he holds 31,780 derivative securities directly in the form of these options.
HUDSON TECHNOLOGIES INC /NY director Mansy Loan Nguyen received new equity compensation. On 2026-06-17, Nguyen was granted 8,881 shares of common stock at no cost and 21,186 stock options to buy common shares at $5.63 per share, expiring on 2029-06-17.
Following the award, Nguyen directly holds 34,476 common shares and 21,186 stock options, all shown as acquisitions rather than market purchases or sales.