Fundz

Eta Gen, Inc. reported raising $25 Million in an initial SEC Form D filing, from an offering of $40 Million

PRIVATESep 14, 2017$25M of $40M raised

Amount Raised

$25 Million

$25 Million sold, per SEC Form D (first sale Sep 14, 2017)

Round Type

Venture

Menlo ParkOtherManufacturingInformation TechnologyEnergyRenewable EnergySolarEnergy Storage

Quick answer

Mainspring Energy raised $25 Million in a funding round, dated September 14, 2017. Mainspring Energy is based in Menlo Park, California, United States.

How much did Mainspring Energy raise?
Mainspring Energy raised $25 Million in a funding round on September 14, 2017.
What does Mainspring Energy do?
Mainspring designs and manufactures an advanced, flexible power generation solution — the Linear Generator — that gives leading C&I companies, data centers, and utilities reliable, scalable, sustainable power capacity.
Where is Mainspring Energy based and how big is it?
Mainspring Energy is based in Menlo Park, California, United States. Fundz records about 478 employees.
Who are the decision-makers at Mainspring Energy?
Fundz holds 1 contact at Mainspring Energy, including the Director. Names and contact details are shown to Fundz members.

Source: Fundz verified event record.

Who else raised in Energy and Renewable Energy around the same time

Companies in the same sectors as Mainspring Energy that raised within 45 days of this round, from Fundz verified event records.

  • FORUM ENERGY TECHNOLOGIES, INC. raised $119M on October 2, 2017.
  • Olenox Industries raised $550K (Seed) on October 23, 2017.
  • Lithium South Development raised $88K (Pre-Seed) on October 18, 2017.
  • Greenway Technologies raised $2.2M (Seed) on September 28, 2017.
  • Terrestrial Energy raised $5.9M on September 22, 2017.
  • Uranium Energy raised $50K (Seed) on September 15, 2017.

Who to call at Mainspring Energy, and when

A new round usually means Mainspring Energy is about to hire and buy. The teams that reach out first get the meeting.

  • An alert the day Mainspring Energy raises, hires an executive or expands, scored against what you sell
  • The decision-makers there, with verified emails
  • Who you already know at Mainspring Energy, from your own LinkedIn network

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Company Information

Company

Mainspring Energy

Location

3601 Haven Ave

Menlo Park, California, United States

About

Mainspring designs and manufactures an advanced, flexible power generation solution — the Linear Generator — that gives leading C&I companies, data centers, and utilities reliable, scalable, sustainable power capacity. Any fuel, any scale, anytime, anywhere.

AI made execution free. Knowing first is the whole game now.

Fundz sees it the moment Mainspring Energy raises, hires an exec or expands, usually minutes after it happens, and tells you who to reach.

Related People

1 contact
Verified contactsGary L., Director hidden hidden hiddenSee plans and pricing
Predictive Intelligence
Strategic

ML-powered predictions for Mainspring Energy's next move

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Mainspring Energy raised. Fundz records a round at a median of 3.6 minutes from the SEC filing, with the decision-maker attached.

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Fundz is a real-time business intelligence platform powered by agentic AI that proactively delivers personalized daily signals, including funding rounds, executive changes, M&A activity, 13F institutional filings, SEC 8-K events, investor activity, and website modifications, based on each user's watchlist and ICP. A trusted data source at firms such as BlackRock, Oracle, Kleiner Perkins, LinkedIn, HubSpot, and Cloudflare, Fundz democratizes the institutional-grade intelligence that previously required a PitchBook or Bloomberg terminal. Features include Daily Briefing for AI-powered daily briefings, and unified cross-signal alerts across 281,000+ organizations. Developers and data teams can access these signals programmatically via the Fundz Funding Data API, with transparent published pricing.