What Changed
Price Move History
- Daily moves over 5%
- 14 252 sessions, September 12, 2025 to September 14, 2026
- Largest daily move
- -22.4% close of November 6, 2025
- 1-year change
- -47.5% closing prices, September 12, 2025 to September 14, 2026
- 5-year change
- +63% closing prices, September 14, 2021 to September 14, 2026
Company Description
Hudson Technologies, Inc. (NASDAQ: HDSN) operates in the Heating, Ventilation, Air Conditioning and Refrigeration (HVACR) industry as a provider of refrigerant products and related services. According to the company’s public disclosures, Hudson has focused for nearly three decades on refrigerant recovery, reclamation and lifecycle management, with its products and services primarily used in commercial air conditioning, industrial processing and refrigeration systems.
Hudson Technologies is described in its filings as a New York corporation with common stock listed on the Nasdaq Capital Market under the symbol HDSN. The company reports that it has become one of the first and largest refrigerant reclaimers in the United States through multimillion dollar investments in plants and advanced separation technology. This technology is used to recover a wide variety of refrigerants and restore them to Air-Conditioning, Heating, and Refrigeration Institute (AHRI) standards for reuse as certified EMERALD Refrigerants™.
Core products and services
Based on the company’s own descriptions, Hudson’s offerings include:
- Refrigerant and industrial gas sales used in commercial air conditioning, industrial processing and refrigeration systems.
- Refrigerant management services, consisting primarily of reclamation of refrigerants that have been recovered from field systems.
- RefrigerantSide® Services, which are performed at a customer’s site and consist of system decontamination to remove moisture, oils and other contaminants from refrigeration and cooling equipment.
- SmartEnergy OPS®, a web-based real-time continuous monitoring service applicable to a facility’s refrigeration systems and other energy systems.
- Chiller Chemistry® and Chill Smart® services, which the company describes as predictive and diagnostic service offerings.
- Carbon offset projects generated as a component of the company’s products and services.
Hudson also references ownership of a web-based real-time monitoring service used in facility refrigeration and other energy systems, aligning with its SmartEnergy OPS® offering. These services are positioned around improving system performance, monitoring energy use and supporting responsible refrigerant management.
Refrigerant reclamation and lifecycle management
The company repeatedly highlights its role in refrigerant reclamation. Public statements note that Hudson invests in advanced separation technology to recover and reprocess a wide variety of refrigerants to AHRI standards. The company emphasizes the aftermarket supply chain of recovered refrigerant as essential to reclamation and responsible refrigerant management, particularly as regulatory frameworks such as the AIM Act phase down the supply of virgin HFC refrigerants.
Hudson’s refrigerant lifecycle management activities, as described in its news releases, include refrigerant buyback, sales and distribution, cylinder exchange, onsite recovery and reclamation. Through acquisitions, such as the purchase of the business assets of Denver Refrigerants, Inc. (doing business as Refrigerants Inc.), Hudson has expanded its recovery network and geographic footprint, as well as access to contractors and technicians who recover and return aftermarket refrigerant.
Customer and contract relationships
According to company announcements, Hudson manages and supplies refrigerants, compressed gases, cylinders and related items to U.S. military commands and installations and federal civilian agencies under an indefinite delivery, indefinite quantity contract with the U.S. Defense Logistics Agency (DLA). The company notes that primary users under this contract include the U.S. Army, Navy, Air Force and Marine Corps, and that it has served as prime contractor to the DLA since 2016.
Hudson also reports participation in pilot programs and partnerships focused on refrigerant recovery and reclamation. Examples include selection by the California Air Resources Board’s REFRESH pilot program and a Refrigerant Recovery and Reclamation pilot with the DC Sustainable Energy Utility. In these programs, Hudson works with HVAC contractors, provides training on recovery best practices, supplies storage containers for used refrigerants, and offers financial incentives for recovered refrigerant in addition to program incentives.
Capital structure and credit facilities
Hudson’s SEC filings indicate that its common stock has a par value of $0.01 per share and is registered on the Nasdaq Capital Market. The company has also disclosed a revolving credit facility with Wells Fargo Bank, National Association, as administrative agent and lender. A Third Amendment to the Amended and Restated Credit Agreement reduced the amount of revolving borrowings that may be made under the facility and adjusted certain sublimits and thresholds, as detailed in the filing.
In addition, Hudson’s board of directors has authorized share repurchase programs, including an increase in the amount of common stock that may be repurchased in specified calendar years. Under these programs, the company may repurchase shares through open market transactions, Rule 10b5-1 trading plans or privately negotiated transactions, subject to market conditions and other factors.
Management and governance
Recent Form 8-K filings describe changes in senior leadership and board composition. Hudson reported that its long-serving Chairman, President and Chief Executive Officer stepped down from those roles, and that the Chief Financial Officer assumed Chief Executive Officer responsibilities on an interim basis. Subsequently, the board appointed a new Chairman of the Board, President and Chief Executive Officer, effective on a specified date, and entered into an employment agreement outlining compensation, term, non-compete obligations and severance provisions.
The company has also disclosed director resignations that, according to its filings, were not the result of any disagreement with the company as referenced in Item 5.02(a) of Form 8-K. These governance disclosures provide investors with information about leadership transitions and related contractual arrangements.
Regulatory and environmental context
Hudson’s public communications frequently connect its business to environmental and climate considerations. The company notes that it participates in programs funded through initiatives such as the F-gas Reduction Incentive Program, which are designed to alleviate barriers to adopting climate-friendly refrigerant technologies and to reduce emissions of high global warming potential refrigerants by increasing recovery and reclamation.
In partnership announcements, Hudson cites external research indicating that refrigerant recovery, reclamation and reuse can significantly reduce emissions compared to using newly manufactured refrigerant. The company describes its activities as contributing to a circular refrigerant economy by recovering refrigerants during servicing, preventing venting into the atmosphere, and returning reclaimed product to the market.
Stock information and reporting
Hudson Technologies files periodic and current reports with the U.S. Securities and Exchange Commission under its Commission File Number 1-13412. Its SEC filings include financial statements, management discussion and analysis, details of material contracts, credit agreements, executive employment arrangements, and other events such as acquisitions, contract awards and share repurchase authorizations.
Investors researching HDSN stock can review these filings, along with the company’s news releases, to understand Hudson’s operations in refrigerant and industrial gas sales, reclamation services, onsite system decontamination, monitoring and diagnostic services, and its participation in government contracts and environmental programs related to refrigerant management.
Stock Performance
Hudson Technologies (HDSN) closed at $5.33 on September 14, 2026. Over the past 12 months, the price has lost 47.5%.
HDSN Metrics & Rankings
Price returns through September 14, 2026. Month-to-date and YTD include the first trading day. Ranking links may use different dates.
Latest News
Hudson Technologies has 10 recent news articles. Of the recent coverage, 5 articles coincided with positive price movement and 5 with negative movement. Key topics include earnings, conferences, earnings date. View all HDSN news →
SEC Filings
Hudson Technologies has filed 5 recent SEC filings, including 3 Form 4, 1 Form 10-Q, 1 Form 8-K. The most recent filing was submitted on September 4, 2026. SEC filings provide transparency into a company's financial condition, material events, and regulatory compliance. View all HDSN SEC filings →
Insider Radar
Insider buying activity at Hudson Technologies over the past 90 days may reflect management confidence in the company's direction. Institutional investors and analysts often monitor insider purchases as a potential bullish indicator for the stock.
Financial Highlights
Hudson Technologies generated $246.6M in revenue in FY2025, retaining a 25.2% gross margin, operating income reached $18.6M (7.5% operating margin), and net income was $16.7M, reflecting a 6.8% net profit margin. Diluted earnings per share stood at $0.37. The company generated -$3.2M in operating cash flow. With a current ratio of 3.26, the balance sheet reflects a strong liquidity position.
Upcoming Events
Climate Week panel
Bridge contract expiration
First optional extension end
Second optional extension end
AIM Act supply reduction
IDIQ term expiration
IDIQ option expiry
Hudson Technologies has 7 upcoming scheduled events. The next event, "Climate Week panel", is scheduled for September 21, 2026 (in 6 days). Investors can track these dates to stay informed about potential catalysts that may affect the HDSN stock price.
Short Interest History
Short interest in Hudson Technologies (HDSN) currently stands at 3.2 million shares, up 41.1% from the previous reporting period, representing 8.7% of the float. Since September 2025, short interest has increased by 196.1%.
Days to Cover History
Days to cover for Hudson Technologies (HDSN) currently stands at 3.6 days, down 14.6% from the previous period. This days-to-cover ratio represents a balanced liquidity scenario for short positions. The days to cover has decreased 22.9% over the past year, suggesting improved liquidity for short covering. The ratio has shown significant volatility over the period, ranging from 1.9 to 6.0 days.
HDSN Company Profile & Sector Positioning
Hudson Technologies (HDSN) operates in the Specialty Chemicals industry within the broader Basic Materials sector and is listed on the NASDAQ.
Investors comparing HDSN often look at related companies in the same sector, including Koppers Holdings, Inc. (KOP), Mativ Holdings, Inc. (MATV), Orion S.A. (OEC), Lightwave Logic, Inc. (LWLG), and Kronos Worldwide, Inc. (KRO). Comparing financial metrics, valuation ratios, and stock performance across these peers can help investors evaluate HDSN's relative position within its industry.