Adden was founded by William Fitzhugh, Luhan Ye, Xin Li in 2021.

Who are Adden's investors?

Adden's investors include At One Ventures, MassVentures, Rhapsody Venture Partners, Primavera Venture Management Limited.

How much funding has Adden raised?

Adden has disclosed $37M raised across 3 rounds.

Where is Adden headquartered?

Adden is headquartered in Waltham, US.

Adden

Waltham, US · Founded 2021 · 4 known investors

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Adden Energy develops solid-state, dynamically-stable batteries based on self-healing separator technology discovered at Harvard, aimed at fast charging, long lifetime, and non-flammable components. The batteries target electric vehicles, automakers, and other applications including drones, data centers, and robotics.

Cleantech Deep Tech Energy

Founders & leadership

Adden was founded in 2021 by William Fitzhugh, Luhan Ye, and Xin Li.

William FitzhughCo-founder & CEO

Luhan YeCo-founder & CTO

Xin Li Co-founderXin Li is a researcher at Harvard University with expertise in energy storage materials, electrochemistry, and advanced characterization techniques including electron microscopy and X-ray diffraction. He founded Adden Energy, which develops solid-state batteries using self-healing separator technology for electric vehicles and other applications.

Karl McGoldrickFounder

Knudt FlorNamed on SEC filing

Jason WhaleyNamed on SEC filing

Board

Bernard Lupien Board directorBernard Lupien is a director at Adden Energy, which develops solid-state batteries based on self-healing separator technology for applications such as electric vehicles, drones, data centers, and robotics. He began his career as a technology developer and moved into commercial roles across robotics, lithium-ion batteries, and advanced materials, focusing on commercializing technologies from scientific research.

Fred HuCo-founder & Board Director

Laurie Menoud Board directorLaurie Menoud is a founding partner at At One Ventures, a deep technology investment firm. She previously co-founded multiple ventures from SRI International to commercialize research from U.S. government-backed programs, and held roles in innovation strategy and venture investment at Solvay and BASF; she holds Master's degrees in Biotechnology from École Supérieure d'Ingénieurs de Luminy and in Innovation from EM Lyon Business School.

Investors · 4

At One Ventureslisted by At One VenturesMenlo Park · $100K – $5M

How we know: At One Ventures's portfolio page · a partner's Signal profile · board seat on SEC Form D · the VCSheet dataset · Not right? Tell us

MassVentureslisted by MassVenturesWaltham · $250K – $500K

How we know: MassVentures's portfolio page · press coverage · Not right? Tell us

Rhapsody Venture Partnerslisted by Rhapsody Venture PartnersCambridge · $500K – $2M

How we know: Rhapsody Venture Partners's portfolio page · press coverage · open dataset · 5k.vc investor directory · Not right? Tell us

Primavera Venture Management LimitedreportedHong Kong

How we know: funding news · Not right? Tell us

Reported raises · per SEC filings

Form D private placements

$37M disclosed across 3 rounds · 2022–2026

▶$16.9MraisedOct 2026 · 7 investors · Other Energy

Rule 506(b)

Officers, directors & promoters on the filing

William FitzhughExecutive Officer, Director
Laurie MenoudDirector
Fred HuDirector
Knudt FlorDirector
Luhan YeExecutive Officer, Director
Jason WhaleyDirector

Offering amount: $26.6M
Amount sold: $16.9M
First sale: Sep 2026
Incorporated: Corporation, Delaware
Federal exemptions: 06b

Full filing on SEC EDGAR ↗

▶$15MraisedSep 2024 · 4 investors · Other Energy

Rule 506(b)

Officers, directors & promoters on the filing

Bernard LupienDirector
William FitzhughExecutive Officer, Director
Luhan YeExecutive Officer, Director
Fred HuDirector
Xin LiExecutive Officer, Director
Laurie MenoudDirector

Offering amount: $15M
Amount sold: $15M
First sale: Aug 2024
Incorporated: Corporation, Delaware, 2021
Federal exemptions: 06b

Full filing on SEC EDGAR ↗

▶$5.1MraisedFeb 2022 · 3 investors · Other Energy

Rule 506(b)

Officers, directors & promoters on the filing

Xin LiExecutive Officer, Director
William FitzhughExecutive Officer, Director
Bernard LupienDirector
Fred HuDirector

Offering amount: $5.1M
Amount sold: $5.1M
First sale: Feb 2022
Incorporated: Corporation, Delaware, 2021
Federal exemptions: 06b

Full filing on SEC EDGAR ↗

Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.

In the news

Adden Energy Raises $15M in Series Afinsmes.com · Oct 2024

Frequently asked questions

What does Adden do?: Adden Energy develops solid-state, dynamically-stable batteries based on self-healing separator technology discovered at Harvard, aimed at fast charging, long lifetime, and non-flammable components. The batteries target electric vehicles, automakers, and other applications including drones, data centers, and robotics.
Who founded Adden?: Adden was founded by William Fitzhugh, Luhan Ye, Xin Li in 2021.
Who are Adden's investors?: Adden's investors include At One Ventures, MassVentures, Rhapsody Venture Partners, Primavera Venture Management Limited.
How much funding has Adden raised?: Adden has disclosed $37M raised across 3 rounds.
Where is Adden headquartered?: Adden is headquartered in Waltham, US.