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Top Series B Climate tech companies

Companies decarbonising power, transport, agriculture, and industry. Filtered to companies whose latest disclosed round is Series B.

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Built from a search like: “Top Series B Climate tech companies”

Ranked by current headcount across Series B Climate tech companies. Refreshed daily.

  1. 1
    Suntech· Jiangsu, China
    • Series B
    • 1.8k employees
    • Founded 2001
  2. 2
    Advanced Disposal Services, Inc.· Ponte Vedra Beach, Florida, United States
    • Series B
    • 894 employees
    • Founded 2000
  3. 3
    Varaha· Gurugram, Haryana, India
    • Series B
    • 329 employees
    • Founded 2022
  4. 4
    5B· Mascot, New South Wales, Australia
    • Series B
    • 246 employees
    • Founded 2013
  5. 5
    TAS Environmental Services, L.P.· Irving, Texas, United States
    • Series B
    • 217 employees
    • Founded 2004
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Find engineers and founders at Series B Climate tech companies

Series B Climate tech companies are some of the most active hirers in the market. The list above ranks the largest Climate tech companies whose latest disclosed round is Series B, by current headcount, drawn from public LinkedIn and Crunchbase records. Across 109matching companies, you’ll find senior engineers, founding designers, and operators worth tracking.

Companies at this stage in Climate tech share a profile: a working product, fresh capital, and a hiring plan that wants senior people yesterday. Looking at headcount, last round, and HQ side by side gives you a quick read on where Climate tech talent is concentrating right now.

Refolk converts this list into a search. Ask for “Series B Climate tech founders hiring senior engineers” or “design leads at Series B Climate tech companies” and Refolk returns a fresh ranked shortlist with the sources behind each match.

How this list is built

Refolk pulled Climate tech companies whose latest disclosed funding round is Series B from public LinkedIn and Crunchbase records, ranked them by current employee count, and kept those with at least 5 employees. The list refreshes once a day.

Last refreshed: Sun, 21 Jun 2026 11:22:27 GMT

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