Pacific Fusion company profile: valuation, funding & revenue

This Pacific Fusion company profile covers the company's valuation, revenue, funding rounds, investors and history. Pacific Fusion works in energy, with a focus on nuclear fusion. It was founded in 2023 and is headquartered in Fremont, California, United States. Every figure links to a public source, and anything the company hasn't disclosed is marked as such.

Revenue

Funding history

Pacific Fusion timeline

Key dates from the sources on this page, oldest first. Metric snapshots are listed after the funding events.

• 2023 — Pacific Fusion is founded in Fremont by Eric Lander (CEO) and Will Regan.
• Oct 2024 — Series A: US$900M (tranched). Investors: General Catalyst (lead); Breakthrough Energy Ventures and individual investors.
• October 2024 — Series A structure: US$900 million committed, released in tranches as milestones are met.

Investors

Overview

Pacific Fusion is developing fusion energy using a pulsed approach known as pulser-driven inertial fusion. Instead of holding plasma in place with magnetic fields for long periods, as tokamaks and stellarators do, the company uses extremely powerful, short electrical pulses to compress a small fuel target so quickly that fusion occurs before the fuel can fly apart. It emerged from stealth in October 2024 with a US$900 million Series A, one of the largest first rounds in the history of the energy sector, led by General Catalyst. The money is released in tranches as the company meets technical milestones, and the company aims to demonstrate net energy gain from its system.

Eric Lander, the CEO, co-founded Pacific Fusion with Will Regan in 2023. Lander is a mathematician and geneticist who was founding director of the Broad Institute of MIT and Harvard, a leader of the Human Genome Project and science adviser to the US president in 2021–2022. Regan, the company's president, has worked in technology and investing. The company has recruited physicists and engineers with backgrounds in fusion research, including from US national laboratories.

Technology

• Pulsed power: banks of electrical modules that store energy and release it in an enormous, precisely timed pulse.
• Magnetised fuel targets: small targets that are compressed by the magnetic forces created by the pulse.
• Modular design: a system built from many identical pulser modules, which the company argues can be manufactured efficiently.
• Demonstration system: a planned machine to show scientific net energy gain.

Funding

Pacific Fusion announced a US$900 million Series A in October 2024, led by Hemant Taneja of General Catalyst, with participation from Breakthrough Energy Ventures and individual investors. The capital is tranched, meaning it is released in stages as the company meets milestones it hasn't publicly detailed. Taneja, former Google CEO Eric Schmidt and Stripe co-founder Patrick Collison joined the board. The company didn't disclose a valuation, so we show it as not disclosed and don't include it in valuation-ranked tables.

Business model

Pacific Fusion has no revenue. Its long-term goal is to design fusion power plants that can provide firm, carbon-free electricity, either selling plants and technology or partnering with utilities and industrial customers. Before that, it must prove its approach works at the scale needed for net energy gain.

Competition

Pacific Fusion competes with fusion companies using other approaches, including tokamaks (Commonwealth Fusion Systems), stellarators (Proxima Fusion), magneto-inertial approaches (Helion, Zap Energy) and laser-driven inertial fusion (Xcimer, Marvel Fusion). Government programmes, including the US National Ignition Facility, which achieved fusion ignition with lasers in 2022, advance related science.

Pacific Fusion at a glance

Pacific Fusion is a Fremont, California, fusion energy company founded in 2023 by Eric Lander and Will Regan. It is developing pulser-driven inertial fusion. It launched with a US$900 million tranched Series A led by General Catalyst in October 2024, without disclosing a valuation.

Timeline

• 2023: founded.
• October 2024: emerges from stealth with a US$900 million Series A.
• 2025–2026: builds and tests pulser modules and facilities.

Why pulsed fusion

Inertial fusion became more credible after the National Ignition Facility at Lawrence Livermore National Laboratory achieved ignition in December 2022, producing more fusion energy from a target than the laser energy delivered to it. Lasers, however, are expensive and inefficient. Pulsed-power systems convert electricity into a compression pulse more efficiently and can be built from many standard modules. Pacific Fusion's bet is that modern electronics and manufacturing make pulsed power a cheaper path to a fusion power plant than large laser facilities.

Milestone-based funding

Releasing capital in tranches tied to milestones is common in biotech and increasingly used in deep tech. It protects investors from committing all their money before key risks are addressed, while giving the company confidence that funding will be available if it succeeds. The structure also means the headline US$900 million is not all available at once.

Who backs Pacific Fusion

Pacific Fusion's backers include General Catalyst, Breakthrough Energy Ventures (founded by Bill Gates), and prominent technology figures such as Eric Schmidt and Patrick Collison.

Valuation context

Because Pacific Fusion hasn't disclosed a valuation, it doesn't appear in our valuation-ranked tables. Our guide to fusion energy companies compares it with peers.

Risks

• Scientific risk: net energy gain with this approach hasn't been demonstrated at scale.
• Engineering risk: power plants need repeated pulses, durable components and fuel handling.
• Funding conditions: later tranches depend on meeting milestones.
• Long timelines: commercial power is likely years away.

The race to fusion

More than 40 private companies worldwide are pursuing fusion energy, backed by billions of dollars from venture capital, technology investors and governments. They use a wide variety of approaches, from large magnetic confinement machines to compact pulsed systems and lasers. Investors spread bets across approaches because it isn't yet clear which will produce economical power first. Key milestones include achieving scientific net energy gain, where the fusion reaction produces more energy than is put into the fuel, and then engineering gain, where the whole plant produces more electricity than it consumes. Commercial power also requires durable materials, reliable operation for years and a supply of fuel such as tritium. Pacific Fusion's large initial funding gives it time to pursue these milestones, but like all fusion companies, it faces a long road.

Technology companies have become important supporters of fusion, partly because of rising electricity demand from AI data centres. Several have signed agreements to buy future fusion power or invested in fusion startups, creating potential early customers.

Questions for observers

• Which milestones unlock the next tranches of funding?
• When will its demonstration system be complete?
• How does its cost per unit of energy compare with other fusion approaches?

Answers to these questions will emerge gradually through technical publications, facility announcements and funding updates, which are the best indicators of progress for any fusion company before power plants exist.

Latest developments (October 2026)

Pacific Fusion broke ground on its first fusion facility at Mesa del Sol in New Mexico on 25 August 2026, after announcing a record-setting collaboration with Lawrence Livermore National Laboratory in July and validating a scaled module of its pulser technology in June, according to its newsroom. It aims to complete a full-scale pulser module by the end of 2026 and to reach net facility gain by 2030. See our nuclear and fusion guide.

What to watch

Watch pulser module tests, construction of its demonstration system, milestone-based funding releases and partnerships with utilities.

Takeaways

Energy buyers may eventually gain another fusion option. Founders can see how milestone-based funding supports deep tech. Investors should note that its valuation hasn't been disclosed.

Sources

Every figure on this page comes from the public sources below. Where sources disagreed, we used the company's own announcement or a primary news report. Private-company data changes; check the date beside each figure.

1. Bloomberg