Rainmaker Raises $100M Series B to Scale Low-Cost Water Production and Weather Modification
EmitenTrust.com Funding will expand the research organization behind the first validated proof of manmade precipitation.
EL SEGUNDO, Calif., Sept. 21, 2026 /PRNewswire/ -- Today, Rainmaker Technology Corporation announces a $100 million Series B fundraise to grow its atmospheric research organization and drive down the cost of producing new freshwater via cloud seeding. The round includes investments from NOA VC, Upfront Ventures, DCVC, Lowercarbon Capital and Dream Ventures. Rainmaker Founder and CEO Augustus Doricko issued the following statement:
"The future of water is the future of everything. With this historic investment in weather modification technology, Rainmaker will continue to conduct frontier atmospheric research, cloud seed to end drought in the American west, and develop the tech stack that will make the earth more habitable for generations to come."
Background
Rainmaker Technology Corporation is a next-generation cloud seeding company based in El Segundo, Calif. The company flies weather-resistant drones into winter storm clouds and releases a small amount of silver iodide, a particle that ice crystals form around. Those crystals grow heavy enough to fall as rain or snow. Rainmaker's own radar and validation systems then measures how much additional precipitation each operation produced — the step that has historically been missing from cloud seeding.
Earlier this year, Rainmaker became the first private company in history to physically validate the results of cloud seeding operations. Over four months, the company recorded 82 unambiguous seeding signatures, distinct radar patterns that tie precipitation directly to a seeding flight. Together they account for more than 145 million verified gallons of freshwater, nearly the annual water use of 1,800 American households. In August, Rainmaker produced 19 million gallons in about three hours near Homer, Alaska, marking a significant improvement in the efficiency of the technology.
This new round of funding will support a rapid expansion of Rainmaker's research team, which today includes atmospheric scientists, radar and satellite specialists, and material scientists. Their work is aimed at answering the questions that determine how much water an operation yields: which clouds to seed and when, how much material to release, and where precipitation should fall to do a watershed the most good for farms, ecosystems, and industry. Rainmaker will also support research at national laboratories and fund weather modification research at American universities.
Rainmaker's cost per acre-foot of water falls sharply as the company produces more of it, and additional drone teams can operate in parallel to increase production. By the November 2026–April 2027 season, Rainmaker expects its water to cost less than most other sources of new supply, including desalination and paying farmers to leave fields unplanted.
Water is Rainmaker's first focus, not its last. The company intends to apply the same approach to other limits on productive land, including hail damage, and poor soil.
This announcement comes as major drought in the American west continues to dominate front page news. Snowpack after the winter of 2025-2026 was the lowest on record, and reservoirs along the Colorado River are hitting historic lows. Cloud seeding provides the most cost-effective method of delivering net new water to the interior of the United States.
Rainmaker currently operates in Utah, Idaho, Oregon, California and Colorado and is working to expand operations throughout the American West and globally.
To learn more, visit rainmaker.com.
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SOURCE Rainmaker Technology Corporation