• Home
  • Latest
  • Fortune 500
  • Finance
  • Tech
  • Leadership
  • Lifestyle
  • Rankings
  • Multimedia
NewslettersTerm Sheet

Cloud seeding startup Rainmaker raises $6.3 million

Allie Garfinkle
By
Allie Garfinkle
Allie Garfinkle
Term Sheet Editor
Down Arrow Button Icon
Allie Garfinkle
By
Allie Garfinkle
Allie Garfinkle
Term Sheet Editor
Down Arrow Button Icon
May 7, 2024, 7:54 AM ET
Rainmaker cofounder Augustus Doricko.
Rainmaker cofounder Augustus Doricko.Rainmaker

Somewhere in El Segundo, surrounded by Moon Pods and a mysteriously large water jug, Rainmaker cofounder Augustus Doricko and I are talking about faith. 

Recommended Video

Doricko—mulleted, casual, and an El Segundo fixture—went looking for God in his late teens and (really) early 20s. 

“I studied under two nondenominational pastors, a Catholic priest and Anglican priests, a Sunni Imam, an Orthodox rabbi, a Reform rabbi, and a Buddhist monk––the Buddhist monk really quickly dropped off,” he told me with a smile. 

It may seem like a non sequitur (if you’re wondering, Doricko now identifies as a Christian). But it’s groundwork for the sort of philosophical, existential kind of person who, at 24, has founded a startup devoted to cloud seeding, a weather modification technique that seeks to introduce ice nuclei to clouds, causing precipitation to form—in short, making it rain. And lest you think this is a crackpot idea with no backers, you’d be sorely mistaken. 

Rainmaker has raised $6.3 million for its seed round, the company announced today. The group of investors includes Long Journey Ventures, Day One Ventures, Tamarack Global, 1517 Fund, Starship VC, and Champion Hill Ventures, along with Garry Tan and (among other things) former Andreessen Horowitz partner Balaji Srinivasan.

And Doricko (a Thiel Fellow) knows you think this is wild. I asked him how often he gets told he’s crazy.

“Every single day!” 

There’s a glee to it, especially since as we dig deeper he’s armed with something pretty persuasive: history.

As it turns out, cloud seeding actually has a long, colorful history in the U.S. Cloud seeding was invented in Schenectady, N.Y. in 1946, and that group of inventors included atmospheric scientist Bernard Vonnegut, the brother of novelist Kurt Vonnegut. And, from 1962 to 1983, the U.S. government’s Project Stormfury sought to weaken cyclones by flying airplanes dispensing silver iodide into them. 

But Project Stormfury had a data problem—it was really hard to tell that it was working with the technology that existed up into the 80s. But the long-entrenched government program proved literally making rain is possible, just hard to quantify. 

“We know that in a tank with the right conditions that our magic beans work and that we can make it rain, but clouds are super dynamic systems,” said Doricko. “There’s no control in nature, right? One cloud versus another, they’re totally different…Then, just because you caused it to rain, how much did you make it rain or snow? It was totally unquantifiable.”

This is a problem that’s en route to being solved, said Doricko. And recently cloud seeding has been the subject of international headlines (consider the floods in Dubai, as people clamor over whether cloud seeding is the cause) and, in China, the country’s cloud seeding operation is among the largest in the world.

I ask Doricko if they’ve made it rain yet.

“Not yet,” he said. “We moved into our lab in December, hired our first engineers in January…then the season was over by the time our product was mature enough. So right now, our options are to fly to Alaska…or focus heads down in engineering now, then get out in the field in September.”

And in the end, even though the phrase “weather modification” sounds grandiose, it’s actually in some ways more muted than it seems, particularly when it comes to the “modification” part.

“You can’t delete a hurricane, but you can reduce the amount of flooding caused by it, by reducing the velocity,” said Doricko. 

I point out to Doricko that there’s an irony here—that one could argue that, on the surface, modifying the weather is a way of playing God.

“We already intentionally modify the environment in a variety of ways,” said Doricko. “I totally understand that, aesthetically, on vibes, weather and rain is something that conventionally has been very much like God’s domain. But in just the same way that a dam is modifying creation, so is modifying the weather.”

See you tomorrow,

Allie Garfinkle
Twitter:
@agarfinks
Email: alexandra.garfinkle@fortune.com
Submit a deal for the Term Sheet newsletter here.

Joe Abrams curated the deals section of today’s newsletter.

VENTURE DEALS

- OverT Bio, a New York City-based developer of cellular therapies for solid tumors, raised $16 million in seed funding. ARTIS Ventures and Wing VC led the round and were joined by Fusion Fund, OMX Ventures, Alexandria Venture Investments, Gaingels, Civilization Ventures, Hawktail, and Cancer Research Institute.

- Neurable, a Boston, Mass.-based developer of brain-computer interface technology, including headphones that can identify and interpret the user’s brain signals, raised $13 million in funding from Ultratech Capital Partners, TRAC, Pace Ventures, and Metaplanet. 

PRIVATE EQUITY

- EQT agreed to take Perficient (NASDAQ: PRFT), a St. Louis, Mo.-based digital consultancy, private for approximately $3 billion in cash.

- Clearlake Capital Group and Francisco Partners agreed to acquire the software integrity group unit of Synopsys (NASDAQ: SNPS), a Sunnyvale, Calif.-based chip designer, in a deal valued at $2.1 billion.

- HALO Dream, a portfolio company of Transom Capital, acquired BreathableBaby, a St. Louis Park, Minn.-based manufacturer of sleep products for babies. Financial terms were not disclosed.

- Ironmark, backed by Post Capital Partners, acquired Deliver Media, a Tampa, Florida-based provider of multi-channel marketing campaign services and L & D Mail Masters, a New Albany, Ind.-based direct mail firm. Financial terms were not disclosed.

- Traffic & Mobility Consultants, a portfolio company of Grovecourt Capital Partners, acquired Lincks & Associates, a Tampa, Fla.-based transportation and traffic engineering services firm. Financial terms were not disclosed. 

EXITS

- KKR agreed to acquire Healthium Medtech, a Bengaluru, India-based medical devices company, from Apax Partners. Financial terms were not disclosed. 

OTHER

- Axon (NASDAQ: AXON) agreed to acquire Dedrone, a Washington, D.C.-based developer of airspace security technology. Financial terms were not disclosed.

- ISSQUARED acquired CCT Technologies, a San Jose, Calif.-based provider of IT solutions to the government, universities, and commercial customers. Financial terms were not disclosed.

PEOPLE

- Bain Capital, a Boston, Mass.-based private equity firm, hired Kevin Quirk as a partner and global head of investor relations. Formerly, he was with Casey Quirk.

- Portage, the Toronto, Canada-based corporate venture capital arm of Sagard Holdings, promoted Victoire de Lavigne to principal.

This is the web version of Term Sheet, a daily newsletter on the biggest deals and dealmakers in venture capital and private equity. Sign up for free.

About the Author
Allie Garfinkle
By Allie GarfinkleTerm Sheet Editor
LinkedIn iconTwitter icon

Allie Garfinkle is a senior writer and editor at Fortune, where she runs Term Sheet; leads coverage of private capital, investors, and startups; and co-chairs the Brainstorm conference series.

See full bioRight Arrow Button Icon

Latest in Newsletters

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025

Most Popular

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Fortune Secondary Logo
Rankings
  • 100 Best Companies
  • Fortune 500
  • Global 500
  • Fortune 500 Europe
  • Most Powerful Women
  • World's Most Admired Companies
  • See All Rankings
  • Lists Calendar
Sections
  • Finance
  • Fortune Crypto
  • Features
  • Leadership
  • Health
  • Commentary
  • Success
  • Retail
  • Mpw
  • Tech
  • Lifestyle
  • CEO Initiative
  • Asia
  • Politics
  • Conferences
  • Europe
  • Newsletters
  • Personal Finance
  • Environment
  • Magazine
  • Education
Customer Support
  • Frequently Asked Questions
  • Customer Service Portal
  • Privacy Policy
  • Terms Of Use
  • Single Issues For Purchase
  • International Print
Commercial Services
  • Advertising
  • Fortune Brand Studio
  • Fortune Analytics
  • Fortune Conferences
  • Business Development
  • Group Subscriptions
About Us
  • About Us
  • Press Center
  • Work At Fortune
  • Terms And Conditions
  • Site Map
  • About Us
  • Press Center
  • Work At Fortune
  • Terms And Conditions
  • Site Map
  • Facebook icon
  • Twitter icon
  • LinkedIn icon
  • Instagram icon
  • Pinterest icon

Latest in Newsletters

Aerie built a brand based on ‘real.’ That’s at the heart of its ‘no AI’ promise
NewslettersMPW Daily
Aerie built a brand based on ‘real.’ That’s at the heart of its ‘no AI’ promise
By Emma HinchliffeMay 1, 2026
10 hours ago
The fruit fly cancer researcher who built his first prototype out of lollipop sticks and straws
NewslettersTerm Sheet
The fruit fly cancer researcher who built his first prototype out of lollipop sticks and straws
By Allie GarfinkleMay 1, 2026
15 hours ago
Apple CEO Tim Cook in Washington, D.C. on December 10, 2025. (Tom Williams/CQ-Roll Call/Getty Images)
NewslettersFortune Tech
Tim Cook’s advice for Apple’s next CEO
By Andrew NuscaMay 1, 2026
16 hours ago
Brian Niccol’s nascent Starbucks turnaround starts with treating workers better
NewslettersCEO Daily
Brian Niccol’s nascent Starbucks turnaround starts with treating workers better
By Phil WahbaMay 1, 2026
17 hours ago
Meta's Hyperion data-center site in Northeastern Louisiana.
NewslettersEye on AI
Big Tech will spend nearly $700 billion on AI this year. No one knows where the buildout ends
By Sharon GoldmanApril 30, 2026
1 day ago
The Tory Burch Foundation is almost halfway to its $1 billion goal for women entrepreneurs
NewslettersMPW Daily
The Tory Burch Foundation is almost halfway to its $1 billion goal for women entrepreneurs
By Emma HinchliffeApril 30, 2026
1 day ago

Most Popular

Scott Bessent on financial literacy: 'it drives me crazy' to see young men in blue-collar construction jobs playing the lottery
Personal Finance
Scott Bessent on financial literacy: 'it drives me crazy' to see young men in blue-collar construction jobs playing the lottery
By Fatima Hussein and The Associated PressMay 1, 2026
13 hours ago
China dominates the world's lithium supply. The U.S. just found 328 years' worth in its own backyard
North America
China dominates the world's lithium supply. The U.S. just found 328 years' worth in its own backyard
By Jake AngeloApril 30, 2026
1 day ago
The U.S. economy is booming — just not where 50 million Americans live
Commentary
The U.S. economy is booming — just not where 50 million Americans live
By Derek KilmerMay 1, 2026
17 hours ago
Accenture's Julie Sweet blew up 50 years of company history. She says the hardest part is still ahead
Conferences
Accenture's Julie Sweet blew up 50 years of company history. She says the hardest part is still ahead
By Nick LichtenbergApril 29, 2026
3 days ago
Apple cofounder Ronald Wayne—whose stake would be worth up to $400 billion had he not sold it in 1976—says that at 91, he has no regrets
Success
Apple cofounder Ronald Wayne—whose stake would be worth up to $400 billion had he not sold it in 1976—says that at 91, he has no regrets
By Preston ForeApril 27, 2026
4 days ago
Current price of oil as of May 1, 2026
Personal Finance
Current price of oil as of May 1, 2026
By Joseph HostetlerMay 1, 2026
14 hours ago

© 2026 Fortune Media IP Limited. All Rights Reserved. Use of this site constitutes acceptance of our Terms of Use and Privacy Policy | CA Notice at Collection and Privacy Notice | Do Not Sell/Share My Personal Information
FORTUNE is a trademark of Fortune Media IP Limited, registered in the U.S. and other countries. FORTUNE may receive compensation for some links to products and services on this website. Offers may be subject to change without notice.