OAKTOP CAPITAL MANAGEMENT II, L.P. - 31 Mar 2025 SCHEDULE 13G/A Report for ASPEN AEROGELS, INC. Common Stock, par value $0.00001 per share (ASPN)

Filing Manager
OAKTOP CAPITAL MANAGEMENT II, L.P.
Reporting Manager
Oaktop Capital Management II, L.P.
Security
ASPEN AEROGELS, INC. Common Stock, par value $0.00001 per share
Symbol
ASPN
Shares outstanding
82,140,654 shares
Disclosed Ownership
4,394,525 shares
Ownership
5.4%
Form type
SCHEDULE 13G/A
Filing time
15 May 2025, 14:17:47 UTC
Date of event
31 Mar 2025
SEC
View on sec.gov

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Quoteable Key Fact

"OAKTOP CAPITAL MANAGEMENT II, L.P. disclosed 5.4% ownership in ASPEN AEROGELS, INC. Common Stock, par value $0.00001 per share (ASPN) on 31 Mar 2025."

Quick Takeaways

  • OAKTOP CAPITAL MANAGEMENT II, L.P. filed SCHEDULE 13G/A for ASPEN AEROGELS, INC. Common Stock, par value $0.00001 per share (ASPN).
  • Disclosed ownership: 5.4%.
  • Date of event: 31 Mar 2025.

What Changed

  • No earlier schedule filing is available for direct comparison.
  • Current filing was accepted on 15 May 2025, 14:17.

Why This Matters

  • This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
  • You can verify ownership claims directly against the original SEC filing.

Official SEC Source

Backed by Schedule 13D/13G

Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.

See Original Filing

Reporting Managers (1)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
Oaktop Capital Management II, L.P. 5.4% 4,394,525 4,394,525 0 Robert F. Moriarty Robert F. Moriarty | Principal

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