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Sepion Technologies Raises $10M in Series B Funding led by Fine Structure Ventures to scale polymer production and expand product lines.

PRIVATEApr 17, 2026

Amount Raised

$10 Million

Round Type

Series B

EmeryvilleOtherManufacturingEnergyRenewable EnergySolarElectronics

Investors

Acvc PartnersImpact Science VenturesCatalus CapitalW. L. Gore And AssociatesSyensqo VenturesVolo Earth VenturesChaileaseFine Structure Ventures

Description

Sepion Technologies, an Alameda, CA-based developer of advanced polymer coatings for lithium-ion batteries, has raised $10M in Series B funding. The round was led by Fine Structure Ventures with contributions from multiple other investors. The company plans to use the funds to scale U.S.-based polymer production and fulfill commercial purchase orders. Sepion Technologies aims to improve energy storage systems through its innovative membrane technologies.

Company Information

Company

Sepion Technologies

Location

Emeryville, California, United States

About

Sepion Technologies is an advanced materials company developing polymer coatings and membrane technologies to improve the performance, safety, and cost of energy storage systems. Its ultra-thin, drop-in separator coatings replace legacy ceramic materials, enabling higher energy density, faster charging, and improved durability without changes to existing battery manufacturing lines. The company supports multiple concurrent customer qualification programs with global battery manufacturers for electric vehicles, energy storage systems, and consumer electronics applications.

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Related People

2 contacts
Verified contactsBrian, Chief Technology Officer hidden hiddenSee plans and pricing
Predictive Intelligence
Strategic

ML-powered predictions for Sepion Technologies's next move

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Funding Insights

What this usually means
Timeline to next round
Series B companies typically work for 15-20 months before raising new capital
Growth expectations
Series B companies are expected to scale rapidly and expand market reach

Sepion Technologies raised. Fundz records a round at a median of 3.6 minutes from the SEC filing, with the decision-maker attached.

145 of these a day, filtered to the companies you pick, with the decision-maker attached.

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Fundz is a real-time business intelligence platform powered by agentic AI that proactively delivers personalized daily signals, including funding rounds, executive changes, M&A activity, 13F institutional filings, SEC 8-K events, investor activity, and website modifications, based on each user's watchlist and ICP. A trusted data source at firms such as BlackRock, Oracle, Kleiner Perkins, LinkedIn, HubSpot, and Cloudflare, Fundz democratizes the institutional-grade intelligence that previously required a PitchBook or Bloomberg terminal. Features include FundzWatch™ for automated website change detection, Daily Briefing for AI-powered daily briefings, and unified cross-signal alerts across 281,000+ organizations. Developers and data teams can access these signals programmatically via the Fundz Funding Data API, with transparent published pricing.