In 2023, Apollo Management launched HYDRIA Gas Technologies by uniting CATEC Gases and Kelley Leasing Partners, creating a leader in high-pressure gas storage and transportation solutions.

Headquartered in Houston, Texas, CATEC Gases has been at the forefront of advancing high-pressure vessel (HPV) technology since its founding in 2014 with Morgan Stanley & Co. funding. As one of only three manufacturers globally authorized by the U.S. Department of Transportation to produce Type IV composite-wrapped cylinders, CATEC earned ASME certification in 2024, cementing its reputation as an industry pioneer. Its state-of-the-art 81,000 sq. ft. facility is the largest dedicated to Type IV vessels, with an annual capacity of 2,000 High Pressure Vessel or 250 integrated units.
HYDRIA’s strategic consolidation solidifies itself as a powerhouse of fully integrated solutions for high-pressure gas storage, transportation, and leasing – uniquely equipped to serve industrial gas markets, low carbon fuel alternatives, and microgrid applications. HYDRIA delivers unmatched reliability and flexibility through advanced manufacturing, rigorous safety standards, and versatile leasing options, meeting the evolving demands of modern energy and industrial markets.