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Exhibit 99.1 HUDSON TECHNOLOGIES REPORTS FIRST QUARTER 2021 RESULTS PEARL RIVER , NY – MAY 5 , 2021 – Hudson Technologies , Inc. ( NASDAQ : HDSN ) announced results for the first quarter ended March 31 , 2021 . For the quarter ended March 31 , 2021 , Hudson reported revenues of $ 33.8 million , a decrease of 7 % compared to revenues of $ 36.4 million in the comparable 2020 period . The decrease in revenue was primarily due to decreased volume , as the COVID pandemic shutdowns did not have as great an impact to the first quarter of 2020 as compared to 2021. The demand decline was partially offset by an increase in selling price of certain refrigerants . Gross margin in the first quarter of 2021 was 27 % , compared to 23 % in the first quarter of 2020 , mainly due to the aforementioned increase in selling price of certain refrigerants . Hudson reported operating income of $ 1.7 million in the first quarter of 2021 compared to operating income of $ 0.4 million in the prior year period . The Company recorded a net loss of $ 1.1 million or ( $ 0.02 ) per basic and diluted share in the first quarter of 2021 , compared to a net loss of $ 2.9 million or ( $ 0.07 ) per basic and diluted share in the same period of 2020. At March 31 , 2021 , the Company had approximately $ 32 million of total availability , consisting of the cash balance plus revolving loan availability . Brian F. Coleman , President and Chief Executive Officer of Hudson Technologies commented , " As we kick off the 2021 selling season , we are optimistic that we'll begin to see a broader reopening of the economy , and specifically a return to facilities such as schools , office buildings and other venues that represent the end markets for many of our customers . With that in mind , we are prepared to meet potential demand as the nine - month cooling season continues , particularly as cooling systems come back online with the gradual return to ‘ business as usual ' and we move into the warmer late spring and summer weather . " Looking at the regulatory landscape , we are encouraged by the progress made with the passing of the AIM Act in December 2020. As a leading source of all refrigerants , Hudson is keenly focused on our role as environmental and sustainability legislation is adopted . Our capabilities as a reclaimer uniquely position us to support the phase down of HFC refrigerants , as we can reclaim and recycle these refrigerants , positioning us as an effective resource in the circular economy of the refrigerant industry . The AIM Act requires the phasedown of HFC production over the next 15 years , with a cumulative 40 % reduction in the baseline scheduled to take place in just 2 ½ years . The installed base of HFC systems is large and growing , so reclamation will be a key component to maintaining necessary supply during an orderly phasedown , and this presents a significant long - term opportunity for Hudson to become an HFC supplier , while also supporting the transition away from production of virgin HFCs . We're excited by the opportunities we're seeing not only to grow our business , but also to provide our services to benefit the environment , " Mr. Coleman concluded . Conference Call Information The Company will host a conference call and webcast to discuss the first quarter results today , May 5 , 2021 at 5:00 P.M. Eastern Time . To access the live webcast , log onto the Hudson Technologies website at www.hudsontech.com , and click on " Investor Relations " . To participate in the call by phone , dial ( 888 ) 506-0062 approximately five minutes prior to the scheduled start time . International callers please dial ( 973 ) 528-0011 . Callers should use entry code : 715446 .