MentionFox lists 35 Climate tech companies for 2026. Of them, 5 are Y Combinator companies (the newest batch here is Fall 2026, with 1); 26 filed a Form D notice with the SEC; 4 won an SBIR or STTR award. Across the 25 Form D notices in the table that report an amount sold, the median is $1.6M; the largest is $100M, by Utility Global, Inc. (its Form D, filed May 29, 2026).
Other years
All years (152) 2022 (21) 2021 (18)
Climate tech startups in 2026
| Company | What it does | Date | Amount | Round / stage | Record |
|---|---|---|---|---|---|
| Xplosafe LLC | Regenerable, integrated rapid cycle amine and trace contaminant control system for sustainable lunar and mars evas | Award starts Sep 28, 2026 | $1.3M | SBIR Phase II | Federal award record |
| PittMoss LLC (funding history) | Filed Sep 25, 2026 | SEC Form D | |||
| Rock Fiber, Inc. (funding history) | Filed Sep 22, 2026 | $3.5M | SEC Form D | ||
| Global Water Resources, Inc. | Filed Sep 3, 2026 | $10M | SEC Form D | ||
| Foundation Instruments Inc | This sbir phase ii project seeks to demonstrate the commercial feasibility of a next generation analyzer platform that offers rural… | Award starts Sep 1, 2026 | $600,000 | SBIR Phase II | Federal award record |
| Viraj Aero | Next generation engines for aircraft and data centers | Fall 2026 | Y Combinator batch | Y Combinator listing | |
| OceanFlex, Inc | Filed Aug 19, 2026 | $48,000 | SEC Form D | ||
| Cuprum Metals Inc. (funding history) | Filed Aug 18, 2026 | $19.4M | SEC Form D | ||
| H2Plus LLC (funding history) | Filed Jul 29, 2026 | $827,750 | SEC Form D | ||
| Qnetic Corp | Filed Jul 20, 2026 | $55,003 | SEC Form D | ||
| Infinite Cooling Inc. | Filed Jul 16, 2026 | $5.3M | SEC Form D | ||
| NatGold Digital Ltd. (funding history) | Filed Jul 15, 2026 | $990,000 | SEC Form D | ||
| Captura Corp. (funding history) | Filed Jul 2, 2026 | $53.5M | SEC Form D | ||
| Nexuma L.L.C. | Driven underground barrier to reduce flooding in coastal communities | Award starts Jul 1, 2026 | $1.1M | SBIR Phase II | Federal award record |
| Green Evolution Technologies (funding history) | Filed Jun 2, 2026 | $400,000 | SEC Form D | ||
| Grip | Robots for waste manipulation | Summer 2026 | Y Combinator batch | Y Combinator listing | |
| Molagri | Resistance free pesticides. | Summer 2026 | Y Combinator batch | Y Combinator listing | |
| Rise Reforming | We turn waste gases into valuable supply-secure chemicals | Summer 2026 | Y Combinator batch | Y Combinator listing | |
| Utility Global, Inc. (funding history) | Filed May 29, 2026 | $100M | SEC Form D | ||
| Lunar Outpost Inc (funding history) | Filed May 14, 2026 | $32.1M | SEC Form D | ||
| Eloo, LLC | Filed May 12, 2026 | $340,000 | SEC Form D | ||
| Allbirds, Inc. | Filed May 1, 2026 | $3.3M | SEC Form D | ||
| Persefoni AI Inc. (funding history) | Filed May 1, 2026 | $4.3M | SEC Form D | ||
| Phoam Labs, Inc. (funding history) | Filed Apr 24, 2026 | $1.2M | SEC Form D | ||
| AquiSense Inc. (funding history) | Filed Apr 22, 2026 | $1.6M | SEC Form D | ||
| Jefferson Timber Cooperative | Filed Apr 21, 2026 | $485,000 | SEC Form D | ||
| CarbonDrop, Inc. (funding history) | Filed Apr 1, 2026 | $16.2M | SEC Form D | ||
| Madrone | Hyper-efficient coolers for data centers | Spring 2026 | Y Combinator batch | Y Combinator listing | |
| RevaTerra Inc. (funding history) | Filed Mar 25, 2026 | $515,788 | SEC Form D | ||
| Soarce, Inc. (funding history) | Filed Mar 4, 2026 | $125,000 | SEC Form D | ||
| Ember LifeSciences, Inc. (funding history) | Filed Mar 3, 2026 | $20.9M | SEC Form D | ||
| StepChange Inc. (funding history) | Filed Feb 13, 2026 | $550,000 | SEC Form D | ||
| Blaze Barrier, Inc. (funding history) | Filed Jan 29, 2026 | $760,000 | SEC Form D | ||
| Inferlink Corp | Modeling sparse and heterogeneous geochemistry data to accelerate critical mineral discovery | Award starts Jan 27, 2026 | $1.2M | STTR Phase II | Federal award record |
| Semafor, Inc. | Filed Jan 9, 2026 | $63.6M | SEC Form D |
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Figures come only from the record linked in each row; a blank means the record gives none. How these lists are built.