Sepion
Silicon Valley, US · Founded 2015 · Delaware corporation · 24 employees on LinkedIn · 13 known investors
Sepion develops advanced polymer separator technology for batteries and other applications including water separation and materials recovery. The company commercializes research from Berkeley Lab with manufacturing and production capabilities in Silicon Valley.
Founders & leadership
Sepion was founded in 2015 by Peter Frischmann and Brett Helms.
PF
Peter FrischmanninCEO & Co-Founder
BH
Brett HelmsCSO & Co-Founder
Board
RC
Randy ChanBoard director
Investors · 13
ACVC PartnersSilicon Valley
Creative VenturesSan Francisco Bay Area · $1M
Fine Structures VenturesCambridge
Foothill VenturesLos Altos · $100K – $10M
ISVWest Palm Beach
VoLo Earth VenturesSnowmass Village · $2M
Dolby Family VenturesreportedSan Francisco
IMPACT SCIENCE VENTURESreportedPalo Alto
Syensqo VenturesreportedBrussels · $540K – $3.2M
Also in the syndicate · 4
Catalus CapitalChaileaseFine Structure VenturesleadW. L. Gore & Associates
Funding
SEC filings, press & company announcements$28.7M disclosed across 2 of 3 rounds · 2021–2026
- Undisclosed amountSeries BApr 2026Source ↗
- $10MSeries BMar 2026 · 2 sources
Fine Structure Ventures (lead), ACVC Partners, Catalus Capital, Chailease, Impact Science Ventures, Syensqo Ventures, Volo Earth Ventures, W. L. Gore & Associates
Source ↗
▶$18.7MraisedNov 2021 · 22 investors · OtherRule 506(b)
▶$18.7MraisedNov 2021 · 22 investors · Other
Rule 506(b)Officers, directors & promoters on the filing
- Peter FrischmannExecutive Officer, Director
- Brett A. HelmsExecutive Officer, Director
- Randy ChanDirector
- Offering amount
- $18.7M
- Amount sold
- $18.7M
- First sale
- Oct 2021
- Incorporated
- Corporation, Delaware
- Federal exemptions
- 06b
Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.
Competitors · 6
by search overlapHexion9 shared keywordsHexion is a materials company operating an R&D lab (The HIL) where scientists, engineers, and technical staff develop new products, with a focus on sustainability and process automation. The page is a careers/recruiting page describing the company's culture, internship program, and hiring initiatives.
Solidion Technology8 shared keywordsSolidion Technology develops and commercializes solid-state and next-generation battery materials, components, and cells, including silicon-anode, solid-state electrolyte, and sodium-ion technologies. It targets the EV and energy storage markets with batteries designed for manufacturing at scale on existing lithium-ion production lines.
Echion Technologies7 shared keywordsEchion Technologies is a battery technology company that develops and commercialises XNO®, a niobium-based fast-charging battery anode material supplied to cell manufacturers worldwide. Its technology is deployed across industries including mining, AI datacentres, robotics, industrial energy storage, rail, and marine.
Sion Power7 shared keywordsSion Power develops lithium-metal batteries through its patented Licerion platform, offering high energy-density cells for defense, aerospace, and electric vehicle applications. Originally a Brookhaven National Lab spin-off, the company runs R&D, testing, and pilot production at its Tucson, Arizona facility.
Lithionbattery7 shared keywordsLithion is a full-stack battery manufacturer that produces off-the-shelf and custom lithium-ion power systems, ranging from 12V to 1500V, along with battery packs, cells, and energy storage systems. Through brands including Lithion Solutions, HomeGrid, GridBox, Aved, and Valence, it serves markets such as defense, medical, robotics, industrial equipment, commercial vehicles, and residential/off-grid energy storage.
Act Ion5 shared keywordsACT-ion Battery Technologies develops single crystal cathode active materials (CAMs) for lithium-ion batteries using a continuous manufacturing process aimed at improving energy density, durability, and safety. The company targets the next-generation energy storage market and seeks to build a domestic U.S. battery materials supply chain.
Companies competing with Sepion for the same Google search keywords, organic and paid, via search-intersection analysis.
Non-dilutive funding · 2 SBIR/STTR awards
Federal grants — no equity taken| Agency | Phase | Year | Amount |
|---|---|---|---|
| Department of Energy | Phase IISTTR | 2017 | $1M |
| Department of Energy | Phase ISTTR | 2016 | $150K |
Source: SBIR.gov award data (U.S. Small Business Administration). SBIR/STTR awards are competitive federal R&D grants and contracts — non-dilutive capital alongside any venture rounds above.
In the news
Frequently asked questions
- What does Sepion do?
- Sepion develops advanced polymer separator technology for batteries and other applications including water separation and materials recovery. The company commercializes research from Berkeley Lab with manufacturing and production capabilities in Silicon Valley.
- Who founded Sepion?
- Sepion was founded by Peter Frischmann, Brett Helms in 2015.
- Who are Sepion's investors?
- Sepion's investors include ACVC Partners, Creative Ventures, Fine Structures Ventures, Foothill Ventures, ISV, VoLo Earth Ventures, Dolby Family Ventures, IMPACT SCIENCE VENTURES and 1 more.
- How much funding has Sepion raised?
- Sepion has disclosed $28.7M raised across 2 of its 3 known rounds.
- Where is Sepion headquartered?
- Sepion is headquartered in Silicon Valley, US.