---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-23-062073"
form_type: "8-K"
ticker: "ASPN"
cik: "0001145986"
company_name: "ASPEN AEROGELS INC"
filed_at: "2023-11-09T23:59:59+00:00"
generated_at: "2026-06-08T06:06:20.993397+00:00"
event_type: "other"
sentiment: "neutral"
materiality_score: 0.1
calibrated_materiality_score: 0.1
confidence: "high"
source: SEC EDGAR
---

# Aspen Aerogels amends bylaws for universal proxy rules and stockholder proposal mechanics

## Summary
- Bylaws updated to address SEC Rule 14a-19 universal proxy card requirements for director nominations.
- Stockholders directly soliciting proxies must use a proxy card color other than white; white reserved for Board.
- Amendments conform to recent Delaware General Corporation Law changes on stockholder lists and meeting adjournments.
- Board approved changes effective November 8, 2023; full text filed as Exhibit 3.1.

## SEC filing metadata
- accession: 0000950170-23-062073
- form_type: 8-K
- ticker: ASPN
- cik: 0001145986
- company_name: ASPEN AEROGELS INC
- filed_at: 2023-11-09T23:59:59+00:00
- event_type: other
- sentiment: neutral
- materiality_score: 0.1
- calibrated_materiality_score: 0.1
- confidence: high
- sec_items: 5.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1145986/000095017023062073/0000950170-23-062073-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1145986/000095017023062073/aspn-20231108.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-23-062073
- JSON: https://secwatch.observer/filing/0000950170-23-062073.json
- Plain text: https://secwatch.observer/filing/0000950170-23-062073.txt

## Key facts
- Governance Changes
  ASPEN AEROGELS INC: Amended and restated bylaws to update procedural mechanics and disclosure requirements for stockholder nominations and proposals, require universal proxy cards, and conform to current Delaware law (effective 2023-11-08).
  - Change: bylaw amendment
  - Effective: 2023-11-08
  source text: On November 8, 2023, the Board of Directors (the “Board”) of Aspen Aerogels, Inc. (the “Company”) approved the amendment and restatement of the Company’s Restated Bylaws (as amended and restated, the “Amended and Restated Bylaws”), which became effective immediately upon adoption.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1145986/000095017023062073/0000950170-23-062073-index.htm

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