Inertia
7 known investors
Inertia develops laser systems and fuel targets for inertial confinement fusion power generation. The company aims to commercialize fusion energy technology for grid-scale electricity production.
Deep TechEnergyHardware
Investors · 7
Bessemer Venture PartnersRedwood City · $5M – $100M
Long Journey VenturesSan Francisco · $100K – $1M
Uncork CapitalSan Francisco · $3M – $5M
GV (Google Ventures)reportedMountain View · $250K – $50M
Threshold VenturesreportedPalo Alto · $500K – $20M
Also in the syndicate · 2
Google VenturesModern Capital
Funding
SEC filings, press & company announcements$450M disclosed across 1 of 3 rounds · 2026
- Undisclosed amountSeries AJul 2026
Bessemer Venture Partners (lead), Google Ventures, Modern Capital
Source ↗ - $450MSeries AFeb 2026 · 3 sources
Bessemer Venture Partners (lead), GV, GV (Google Ventures), Modern Capital, Threshold Ventures
Source ↗
Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.
Competitors · 3
by search overlapHelion Energy37 shared keywordsHelion develops fusion energy systems designed to generate clean electricity for commercial use. The company builds pulsed magnetic fusion prototypes with applications for industrial and commercial electricity generation.
Interestingengineering37 shared keywordsInteresting Engineering is an online media publication covering news and analysis on engineering, science, and technology topics including nuclear energy, semiconductors, robotics, quantum computing, and defense. It offers articles, columns, case studies, and research along with a subscription for ad-free access.
F22 shared keywordsFuse Energy develops fusion energy technology, with work spanning hardened electronics and radiation testing (HEART) and recycling of radioactive waste, aiming to provide an on-demand clean energy source. It brings together a team across engineering, fusion science, energy policy, and manufacturing.
Companies competing with Inertia for the same Google search keywords, organic and paid, via search-intersection analysis.
In the news
Holtec Files with SEC for IPO | Neutron Bytesneutronbytes.com · Jul 2026
Fusion roundup: Helion sets temperature record; Inertia raises $450M -- ANS / Nuclear Newswireans.org · Jul 2026Frequently asked questions
- What does Inertia do?
- Inertia develops laser systems and fuel targets for inertial confinement fusion power generation. The company aims to commercialize fusion energy technology for grid-scale electricity production.
- Who are Inertia's investors?
- Inertia's investors include Bessemer Venture Partners, Long Journey Ventures, Uncork Capital, GV (Google Ventures), Threshold Ventures.
- How much funding has Inertia raised?
- Inertia has disclosed $450M raised across 1 of its 3 known rounds.