Fourth Power: Funding, Investors & Team (Aug 2026)
Fourth Power is a start-up in the energy storage industry that employs thermal batteries. Using large-scale thermal storage, this method converts renewable energy into a readily available energy supply.
Fourth Power has raised $39.0M across 2 funding rounds on record, the most recent a Series A of $20.0M announced in Sep 2025.
That round is above the $15M median round size for Energy companies tracked on FundedIQ over the last two years.
Fourth Power Company Profile and Key Stats
Latest funding round on record: Sep 2025.
Fourth Power Funding Rounds
Fourth Power raised $19.0M in a Series A announced in Dec 2023.
1.8 years later, a Series A of $20.0M was announced in Sep 2025.
Fourth Power Founders and Leadership Team
Contact details for the Fourth Power team: 1 of 2 have an email address on file, 1 has a LinkedIn profile.
Start 14-day free trial →Fourth Power Funding Compared to Other Energy Startups
Fourth Power's latest round of $20.0M is above the median round in Energy. Medians cover the last 24 months of disclosed rounds.
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Fourth Power Funding FAQs
What does Fourth Power do?
Fourth Power is a start-up in the energy storage industry that employs thermal batteries. Using large-scale thermal storage, this method converts renewable energy into a readily available energy supply.
How much funding has Fourth Power raised?
Fourth Power has raised $39.0M across 2 rounds on record. The most recent is a Series A of $20.0M announced in Sep 2025.
When did Fourth Power last raise funding?
Fourth Power's most recent funding round on record is a Series A of $20.0M, announced in Sep 2025.
Who founded Fourth Power?
FundedIQ lists Asegun Henry (Founder) at Fourth Power.
Where is Fourth Power headquartered?
Fourth Power is based in Cambridge, Massachusetts, United States.
How many employees does Fourth Power have?
Fourth Power is in the 11-50 employee band.
How does Fourth Power's funding compare to other Energy startups?
Fourth Power's latest round of $20.0M is above the $15M median round size for Energy companies on FundedIQ across 2,284 tracked companies over the last two years.
About FundedIQ's Fourth Power Funding Data
FundedIQ tracks announced funding rounds and refreshes this profile every week. Round dates, stages and amounts are normalised to a single format, converted to US dollars, and de-duplicated: two records of the same round announced days apart are merged, and two genuinely different rounds are kept apart on the amounts they disclose. Amounts shown are the disclosed figures only — a round announced without a number is listed and excluded from the total rather than estimated.
Employee counts are reported bands, not exact headcounts. Founder and executive names carry the job title on record. Anything we do not hold for Fourth Power is left off this page rather than filled in.
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