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GDI

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Scalable 100% silicon battery anodes for Li-ion batteries

Rochester, United StatesFounded 2009Transportation
Valuation $50–100M Last recorded · 2026
Revenue $1–10M Latest reported FY
Headcount 100–500 Current team size
Total funding $50–100M Disclosed equity funding
Unlock exact values This page shows ranges. Dealroom has the exact numbers for GDI and the history behind them.

About GDI

GDI (Graphenix Development Inc.) is a US-based company that develops and manufactures 100% silicon anodes for next-generation lithium-ion batteries. Founded in 2009 by Robert Anstey, the company aims to replace the graphite anodes currently used in most Li-ion batteries. Anstey, who holds a Joint Honors degree in Finance and Economics from McGill University and a Juris Doctor from Northeastern University School of Law, founded the company out of a passion for technologies that can address global problems.

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The company’s core product is a patented 100% silicon anode designed to integrate into existing battery manufacturing processes. This technology addresses key drawbacks of graphite anodes by offering over 30% greater energy density, enabling a 15-minute charge from 10% to 75%, and improving safety. GDI's design uses a continuous, flexible silicon layer which mitigates the swelling and mechanical stress that have traditionally limited the commercial use of silicon in anodes. The company has demonstrated its technology's safety through independent tests, including passing nail penetration tests without thermal runaway. This provides a significant advantage as the market moves towards stricter safety regulations.

GDI's business model is to sell rolls of its silicon anodes directly to battery manufacturers and end-users. This allows clients to enhance their products without needing to invent new manufacturing equipment. The company is targeting a wide range of industries, including electric vehicles (EVs), defense, medical technology, aerospace, and consumer electronics. GDI is positioning itself as a key alternative to the Chinese-dominated graphite supply chain, offering a more geopolitically resilient and domestically sourced material.

The company has secured significant funding and strategic partnerships to scale its production. After initial funding from US government bodies, GDI raised over $20 million in its Series A funding round, co-led by EIT InnoEnergy and Helios Climate Ventures. It also received a €20 million loan from the European Investment Bank (EIB). GDI has established a pilot production facility in Eindhoven, Netherlands, and is building its first manufacturing plant in Lauenförde, Germany, in partnership with AGC Glass Europe and Schlenk SE. The company plans to reach 100 MWh production capacity by 2026 and achieve gigawatt-scale manufacturing by 2030, with initial commercial applications in drones and medical devices expected within 24-30 months, followed by EVs by 2030.

Source: Dealroom company data

At a glance

Status
Operational
Founded
2009
Headquarters
Rochester, United States
Employees
201
Open positions
None listed
Dealroom signal
82.4/100
Sub-industry
Energy Storage, Vehicle Production
Sector
Transportation, Biotechnology, Lithium-Ion Batteries, Battery, Chemical, Sustainable Development Goals, EV Battery, Climate Tech, Electric Mobility
Technology
Hardware, Deep Tech
Business model
Manufacturing
Client focus
b2b

Latest news

Press, funding announcements and product moves mentioning GDI.

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Funding history

10 recorded events

Company financing events and reported valuations.

Deal typeDateAmountValuationInvestorsSource
LATE VCOther financing Apr 2026 $15M $60M InnoEnergy · Helios Climate Ventures LLC · W.L. Gore & Associates
GRANTOther financing Jul 2025 $100K US National Science Foundation
Showing the latest 2 of 10 recorded eventsBook a demo for the full funding history →

Financials

Revenue over time

Revenue, earnings and other financial measures where available. Years marked “E” are estimates.

YearRevenueGrowth
2026
2025
2024
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Growth signals

GDI website traffic

Latest recorded traffic for GDI is 1.7K monthly website visits, down 51.4% over the last three months. GDI's team grew 4.7% over the past year.

Latest monthly visits1.7K 3-month web change-51.4% 1-year team growth+4.7%
Summary metrics are public; monthly history is available with a demoCompare with peers →

Investors

17 investors on the cap table

From Dealroom's funding and investor records, grouped by the round each investor first entered.

Seed9 investors entered at this stage

  • NYSERDA
  • Excell Partners
  • Buffalo Angels
  • Brian J. Lipke
  • US Department of Energy
  • Army SBIR|STTR Program
  • US Army
  • US Defense Logistics Agency
  • US National Science Foundation

Series A6 investors entered at this stage

  • InnoEnergy
  • RIT Venture Fund
  • Helios Climate Ventures LLC
  • Skyview Ventures
  • PMH Investments
  • Rochester Angel Network

Series B and later2 investors entered at this stage

  • European Investment Bank
  • W.L. Gore & Associates
Team profiled 3 named & role-tagged
Founders Hidden — book a demo/100 quality score
Key operators 1 quality Hidden — book a demo/100
Potential founders Hidden — book a demo likely future founders
Startup mafia Hidden — book a demo alumni-founded startups
Talent movements Hidden — book a demo in · Hidden — book a demo out past 12 months

Source: Dealroom Talent Intelligence.

Global footprint

Workforce and web traffic by country
Workforce by country
6 countries with
team presence
🇺🇸 United States73.1%
🇳🇱 Netherlands11.5%
🇦🇹 Austria3.9%
🇨🇦 Canada3.9%
🇬🇧 United Kingdom3.9%
Top 5 of 6 shown

Market sentiment

Posts on X, past 7 days

An AI-synthesised read of the highest-engagement posts about GDI on X, ranked by likes and reposts, corporate channels excluded.

Reading the room on X — pulling top posts and synthesizing themes…

Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour

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