Antora
Sunnyvale, US · Founded 2018 · 275 employees on LinkedIn · 20 known investors
Antora manufactures thermal battery systems for long-duration energy storage, serving manufacturers and data centers seeking to tap into low-cost renewable power. The company designs and produces American-made thermal batteries at scale to provide affordable, reliable energy storage for industrial and large-scale energy users.
Founders & leadership
Antora was founded in 2018 by Andrew Ponec, David Bierman, Justin Briggs, David Bierman, Ph.D., and Justin Briggs, Ph.D..
AP
Andrew PonecinChief Executive Officer, co-founderHe previously co-founded and led Dragonfly Systems, a solar electronics startup acquired by SunPower, where he then worked as an engineer. He studied at Stanford University, doing undergraduate research in materials science and electrical engineering, and later returned as a visiting scholar.
DB
David Bierman
JB
Justin Briggs
DB
David Bierman, Ph.D.Chief Commercial Officer, co-founder
JB
Justin Briggs, Ph.D.Chief Operating Officer, co-founder
Board
CK
CD
SH
Scott HimmelbergerBoard director
JW
John WoolardBoard director
JF
BP
Brook PorterBoard director
Investors · 20
Temasek✓ verifiedSingapore
Congruent VenturesSan Francisco · $100K – $5M
Creative Destruction Lab (CDL)Toronto · $50K – $250K
Fifty YearsSan Francisco · $250K – $2M
GS FuturesSeoul
ISVWest Palm Beach
Loup VenturesMinneapolis
LOWERCARBONJackson · $1M – $50M
Lowercarbon CapitalNew York · $100K – $5M
7percent VenturesreportedLondon · $250K – $2M
BHP Venturesreported
BlackRockreportedNew York
Breakthrough Energy Venturesreported · 3 sourcesBoston · $500K – $50M
EclipsereportedPalo Alto
Eclipse VenturesreportedPalo Alto · $200K – $5Mvia Joe Fath · board
Energy Impact PartnersreportedNew York · $5M – $20M
G2 Venture PartnersreportedPortola Valley · $15M – $25M
Overture Climatereported · 2 sourcesSanta Monica · $1M – $3M
Trust Venturesreported · 2 sourcesAustin
Also in the syndicate · 1
Decarbonization Partnerslead
Funding
SEC filings, press & company announcements$529.3M disclosed across 2 of 3 rounds · 2024–2026
▶$457.6MraisedAug 2026 · 24 investors · OtherRule 506(b)
▶$457.6MraisedAug 2026 · 24 investors · Other
Rule 506(b)Officers, directors & promoters on the filing
- Andrew PonecExecutive Officer, Director
- Justin BriggsExecutive Officer, Director
- David BiermanExecutive Officer, Director
- Christina KarapatakiDirector
- Clay DumasDirector
- Scott HimmelbergerDirector
- John WoolardDirector
- Joe FathDirector
- Brook PorterDirector
- Offering amount
- $550M
- Amount sold
- $457.6M
- First sale
- Jul 2026
- Incorporated
- Corporation, Delaware
- Federal exemptions
- 06b
▶$71.7MraisedNov 2025 · 26 investors · OtherRule 506(b)
▶$71.7MraisedNov 2025 · 26 investors · Other
Rule 506(b)Officers, directors & promoters on the filing
- Andrew PonecExecutive Officer
- Offering amount
- $76.7M
- Amount sold
- $71.7M
- Minimum investment
- $74K
- First sale
- Jul 2025
- Incorporated
- Corporation, Delaware
- Federal exemptions
- 06b
Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.
Competitors · 2
by search overlap
Anthro Energy21 shared keywordsAnthro Energy develops advanced electrolytes and high-performance battery cells to improve energy density, safety, and form factor in battery technology. The company serves the electrification market and operates a production facility in California.
ADP17 shared keywordsADP provides cloud-based human capital management solutions that integrate payroll, HR, talent management, time and attendance, tax, and benefits administration for businesses globally. The company serves as a comprehensive provider of HCM software and business outsourcing services with analytics and compliance expertise.
Companies competing with Antora for the same Google search keywords, organic and paid, via search-intersection analysis.
In the news
Antora has raised $550 Million in new Series C funding - intelligence360intelligence360.news · Aug 2026Frequently asked questions
- What does Antora do?
- Antora manufactures thermal battery systems for long-duration energy storage, serving manufacturers and data centers seeking to tap into low-cost renewable power. The company designs and produces American-made thermal batteries at scale to provide affordable, reliable energy storage for industrial and large-scale energy users.
- Who founded Antora?
- Antora was founded by Andrew Ponec, David Bierman, Justin Briggs, David Bierman, Ph.D., Justin Briggs, Ph.D. in 2018.
- Who are Antora's investors?
- Antora's investors include Temasek, Congruent Ventures, Creative Destruction Lab (CDL), Fifty Years, GS Futures, ISV, Loup Ventures, LOWERCARBON and 11 more.
- How much funding has Antora raised?
- Antora has disclosed $529.3M raised across 2 of its 3 known rounds.
- Where is Antora headquartered?
- Antora is headquartered in Sunnyvale, US.