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A123 Systems

Transportation · Novi, United States · Founded 2001 · IPO 2009

A123 Systems is leading developer and manufacturer of advanced lithium ion batteries and energy storage systems MoreLess

A123 Systems, now a subsidiary of Wanxiang Group, operates as a developer and manufacturer of lithium-ion batteries and energy storage systems. The company was established in 2001 as a spin-out from the Massachusetts Institute of Technology (MIT) by co-founders Professor Yet-Ming Chiang, Ric Fulop, and Bart Riley. The foundation of the company was built upon materials science, specifically a new cathode material called nanophosphate, developed at MIT to create safer and more reliable lithium-ion batteries compared to the lithium-cobalt-oxide systems prevalent at the time.

The company's core business involves designing, manufacturing, and selling advanced rechargeable lithium-ion batteries, battery systems, and individual cells. Its product line is centered on its proprietary Nanophosphate® lithium iron phosphate (LFP) chemistry, which offers high power output, long cycle life, and enhanced safety. This technology is applied across various cell formats, including cylindrical and prismatic cells, as well as integrated battery modules. A123 serves a diverse client base across three main sectors: transportation, electric grid services, and commercial/industrial applications. In the transportation market, it provides battery systems for micro-hybrids (12V/48V systems), plug-in hybrids (PHEVs), and full electric vehicles (EVs), counting major automotive manufacturers like BMW, Porsche, SAIC, and Mercedes Benz among its customers. For the electric grid, the company delivers large-scale battery energy storage systems to utilities to help with grid stability and operating reserves. Early commercial success was also found in supplying batteries for high-power consumer products, such as power tools for Black & Decker and DeWalt.

The company's history includes significant milestones and challenges. After its founding, A123 raised over $300 million in venture capital before a successful IPO on the NASDAQ in September 2009, which raised an additional $380 million. It received substantial government support, including a $249 million grant from the U.S. Department of Energy to build manufacturing facilities in Michigan. However, the company faced difficulties due to a slower-than-expected adoption of electric vehicles, leading to key customers like Fisker Automotive falling short of demand projections. This, coupled with a costly product recall, led A123 to file for Chapter 11 bankruptcy in October 2012. In January 2013, the majority of A123's assets were acquired out of bankruptcy by Chinese automotive components manufacturer Wanxiang Group for $256.6 million, which then organized the new entity as A123Systems, LLC. A123's government and military business was sold separately to Navitas Systems. Under Wanxiang's ownership, the company has seen substantial revenue growth.

Keywords: lithium iron phosphate batteries, LFP battery, Nanophosphate technology, energy storage systems, automotive batteries, electric vehicle batteries, micro-hybrid systems, 48V battery, grid energy storage, battery manufacturer, Yet-Ming Chiang, Wanxiang Group, battery systems, lithium-ion chemistry, high power batteries, long cycle life batteries, commercial vehicle batteries, prismatic cells, cylindrical cells, battery recall, MIT spin-out, electric grid services, transportation batteries, power tool batteries, advanced battery technology

Valuation $257M
Revenue $299M
Total funding $100–500M

Company overview

A123 Systems company information

The essential company record, classifications and operating signals in one place.

Status
Acquired
Founded
2001
Headquarters
Novi, United States
Employees
577
Open positions
1
Dealroom signal
70.6
Investment activity
7 companies · latest Nov 2022
Capital deployed
$359M
Preferred round
GROWTH EQUITY VC
client focusb2btechnologyHardwaretechnologyDeep TechtechnologyNanotechsub industryEnergy Storagesub industryVehicle Productionbusiness modelManufacturingsectorLithium-Ion BatteriessectorSpinoutsectorSustainable Development GoalssectorEV BatterysectorClimate TechsectorElectric MobilitysectorHard Tech

Valuation & funding

A123 Systems funding history

Company financing events and reported valuations.

Deal typeDateAmountValuationInvestorsSource
GROWTH EQUITY VCOther financing Sep 2025 $15M General Electric
GRANTOther financing Jan 2019 $0 UK Research and Innovation
ACQUISITIONOther financing Jan 2013 $257M $257M Wanxiang
BANKRUPTCYOther financing Oct 2012 $0 Undisclosed
POST IPO EQUITYOther financing Jun 2012 $50M Undisclosed
GRANTOther financing Dec 2009 Undisclosed
IPOOther financing Sep 2009 Undisclosed
GRANTOther financing Aug 2009 Undisclosed
SERIES EOther financing Apr 2009 General Electric · Armilar Venture Partners
SERIES DOther financing Oct 2007 Sequoia · Qualcomm · North Bridge Venture Partners · Motorola Solutions
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Financials

Revenue and workforce over time

Available revenue and workforce history. Fields without reported data are omitted.

YearRevenueGrowthEmployees
2026 $500M 0% 580
2025 $500M 0% 581
2024 $500M 0% 581
2023 $500M 0% 581
2022 $500M 0% 581
2021 $500M 0% 574
2020 $500M 663
Company filings, research estimates and Dealroom dataOpen the full financial model →

Growth signals

A123 Systems website traffic

Latest recorded traffic for A123 Systems is 4.6K monthly website visits, down 9.8% over the last three months. A123 Systems's team declined 0.7% over the past year.

Latest monthly visits4.6K 3-month web change-9.8% 1-year team growth-0.7%
Monthly website visits133 observations · Oct 2014–Jul 2026
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Comparisons

A123 Systems compared with similar companies

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Talent graph

A123 Systems's talent

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Team profiled 71 named & role-tagged
Founders Hidden — book a demo/100 quality score
Key operators 5 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.

Investors

16 investors on A123 Systems's cap table

Sourced from Dealroom's funding and investor records. Investor profile links are shown where available.

Seed 1 investor entered at this stage
UK Research and Innovation
Series A 2 investors entered at this stage
Qualcomm Ventures
Madison Parker Capital
Series B+ 12 investors entered at this stage
GE Commercial Finance
GE Capital
North Bridge Venture Partners
FA Technology Ventures
Massachusetts Institute of Technology
Procter & Gamble
Sequoia
Qualcomm
Motorola Solutions
ALLIANCE CAPITAL
General Electric
Armilar Venture Partners
Other known 1 additional known investor
Wanxiang

Global footprint

Where A123 Systems has talent and traffic

Workforce by country
13 countries with
team presence
🇺🇸 United States58%
🇨🇳 China17.8%
🇨🇿 Czech Republic9.7%
🇩🇪 Germany8.9%
🇰🇷 South Korea1.9%
Top 5 of 13 shown

In the news

Latest news about A123 Systems

Recent press, funding announcements, and product moves mentioning A123 Systems — open to read from the original sources.

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Market sentiment

What the market is saying about A123 Systems

An AI-synthesized read of the highest-engagement posts about A123 Systems on X over the past 7 days. We rank by likes & retweets, ignore corporate channels, and surface the themes that broke out from real people.

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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