---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-24-013840"
form_type: "8-K"
ticker: "ASPN"
cik: "0001145986"
company_name: "ASPEN AEROGELS INC"
filed_at: "2024-02-12T23:59:59+00:00"
generated_at: "2026-06-06T04:09:19.177556+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Aspen Aerogels Q4 revenue $84.2M (+41% YoY), gross margin 35%, adjusted EBITDA $9.1M

## Summary
- Q4 revenue $84.2M (+41% YoY), net loss $0.5M ($0.01 EPS) vs loss $9.6M a year ago.
- Gross margin 35%, up 12 points QoQ; adjusted EBITDA $9.1M vs loss $4.5M prior Q.
- Thermal Barriers segment revenue $52.9M (+110% YoY); Energy Industrial $31.3M (-9%).
- FY2023 revenue $238.7M (+32% YoY), net loss $45.8M ($0.66 EPS) improved from $82.7M.
- FY2023 results beat initial outlook midpoint for revenue, adjusted EBITDA, and capex.

## SEC filing metadata
- accession: 0000950170-24-013840
- form_type: 8-K
- ticker: ASPN
- cik: 0001145986
- company_name: ASPEN AEROGELS INC
- filed_at: 2024-02-12T23:59:59+00:00
- event_type: earnings
- sentiment: positive
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 2.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1145986/000095017024013840/0000950170-24-013840-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1145986/000095017024013840/aspn-20240212.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-24-013840
- JSON: https://secwatch.observer/filing/0000950170-24-013840.json
- Plain text: https://secwatch.observer/filing/0000950170-24-013840.txt

## Key facts
- Earnings Releases
  ASPEN AEROGELS INC reported the fourth quarter and full year 2023, which ended December 31, 2023 results: revenue $238.7 million, net income Net loss for the year was $45.8 million, EPS Net loss per share for the year was $0.66.
  - Period: the fourth quarter and full year 2023, which ended December 31, 2023
  - Revenue: $238.7 million
  - Net income: Net loss for the year was $45.8 million
  - EPS: Net loss per share for the year was $0.66
  - Result: reported results
  source text: (EX-99.1) --- EX-99.1 Exhibit 99.1 Aspen Aerogels, Inc. Reports Fourth Quarter and Fiscal Year 2023 Financial Results and Recent Business Highlights For Immediate Release $84.2 million quarterly revenue enabled gross margins of 35% and adjusted EBITDA of $9.1 million NORTHBOROUGH, Mass., February 12, 2024 — Aspen Aerogels, Inc. (NYSE: ASPN) (“Aspen” or the
  evidence_url: https://www.sec.gov/Archives/edgar/data/1145986/000095017024013840/0000950170-24-013840-index.htm
- Earnings Releases
  ASPEN AEROGELS INC reported the fourth quarter and full year 2023, which ended December 31, 2023 results: revenue $238.7 million, net income Net loss for the year was $45.8 million, EPS Net loss per share for the year was $0.66.
  - Period: the fourth quarter and full year 2023, which ended December 31, 2023
  - Revenue: $238.7 million
  - Net income: Net loss for the year was $45.8 million
  - EPS: Net loss per share for the year was $0.66
  - Result: reported results
  source text: Total revenue for the full year 2023 was $238.7 million, compared to $180.4 million in 2022. Net loss for the year was $45.8 million, compared to a net loss of $82.7 million in 2022. Net loss per share for the year was $0.66, compared to $2.10 in 2022.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1145986/000095017024013840/0000950170-24-013840-index.htm

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