Form Energy Current · Verified less than 14 days ago · Last verified: Oct 19, 2026

Form Energy: $6.2B valuation, IPO Readiness 74, Series H. Form Energy is the long-duration energy storage company building multi-day iron-air batteries that can store r. Track live on The IPO Stack.

Series HClimate Techpre-ipo
74
/100
IPO Readiness Score
Grade B — Moderate IPO Readiness
TechStackIPO proprietary score based on funding scale, valuation, stage progression & momentum.
Track Form Energy →

Form Energy is the long-duration energy storage company building multi-day iron-air batteries that can store renewable energy for up to 100 hours — solving the intermittency problem of solar and wind. Valued at $3.4B with $800M raised, Form Energy has signed contracts with major utilities including Xcel Energy and Georgia Power. Major energytech IPO candidate as long-duration storage becomes critical for 100% renewable energy grids globally.

Valuation
$6.2B
Total Funding
$3.2B
Stage
Series H
Sector
Climate Tech
Headquarters
Somerville, MA
CEO
Mateo Jaramillo
IPO Status
pre-ipo

Funding History

August 2017
Series A
$9M
August 2019
Series B
$50M
August 2021
Series C
$200M
April 2023
Series D
$450M
July 2026
Series G
$500M
July 2026
Series H
$600M
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Track Form Energy IPO timeline, funding rounds, investor activity, and valuation on TechStackIPO — the pre-IPO intelligence platform.

Frequently Asked Questions

When is Form Energy going public? +

Form Energy has not announced a specific IPO date as of 2026. With an IPO Readiness Score of 74/100, the company shows strong pre-IPO signals. Subscribe to The IPO Stack newsletter for weekly updates.

What is Form Energy's current valuation? +

Form Energy is valued at $6.2B as of April 2023. This valuation is based on its most recent private funding round tracked by TechStackIPO.

How can I invest in Form Energy before IPO? +

Accredited investors can access Form Energy shares through secondary market platforms, pre-IPO investment funds, and broker-dealer platforms that facilitate private company transactions. TechStackIPO's marketplace tracks available access options. Note: pre-IPO investments carry higher risk and limited liquidity compared to public market investing.

What is Form Energy's IPO Readiness Score? +

Form Energy scores 74/100 (Grade: B) on TechStackIPO's IPO Readiness Index. The score evaluates funding scale, valuation trajectory, funding momentum, stage progression, and company maturity. Scores above 70 indicate strong near-term IPO potential.

How much total funding has Form Energy raised? +

Form Energy has raised $3.2B in total venture capital and private equity funding, with backing from Breakthrough Energy Ventures, ArcelorMittal, BlackRock.

Who are Form Energy's key investors? +

Form Energy's notable investors include Breakthrough Energy Ventures, ArcelorMittal, BlackRock, GIC Singapore, Ontario Teachers' Pension Plan. Full investor details, funding round history, and lead investor breakdowns are available on TechStackIPO.

What sector is Form Energy in? +

Form Energy is a Climate Tech company. Form Energy is the long-duration energy storage company building multi-day iron-air batteries that can store renewable e.

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