---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-23-068172"
form_type: "8-K"
ticker: "ASPN"
cik: "0001145986"
company_name: "ASPEN AEROGELS INC"
filed_at: "2023-12-05T23:59:59+00:00"
generated_at: "2026-06-07T17:43:59.185183+00:00"
event_type: "other_material"
sentiment: "positive"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Aspen Aerogels announces PyroThin award from ACC for Stellantis STLA Medium platform, DOE loan enters due diligence

## Summary
- Additional PyroThin EV Thermal Barrier award from ACC (Stellantis, Saft-TotalEnergies, Mercedes-Benz JV).
- Supply for Stellantis STLA Medium platform; expected start of production in 2025.
- DOE Loan Programs Office confirms pending ATVM application substantially complete; invites formal due diligence.
- Loan intended to fund construction of second aerogel manufacturing facility in Georgia.
- CEO Don Young: European market will drive meaningful portion of revenues over next few years.

## SEC filing metadata
- accession: 0000950170-23-068172
- form_type: 8-K
- ticker: ASPN
- cik: 0001145986
- company_name: ASPEN AEROGELS INC
- filed_at: 2023-12-05T23:59:59+00:00
- event_type: other_material
- sentiment: positive
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1145986/000095017023068172/0000950170-23-068172-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1145986/000095017023068172/aspn-20231205.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-23-068172
- JSON: https://secwatch.observer/filing/0000950170-23-068172.json
- Plain text: https://secwatch.observer/filing/0000950170-23-068172.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.