Aspen Aerogels (ASPN)Driehaus Capital Management LLC exited its position 2.55M shares

2.55M

Prior-quarter shares · no longer reported

Holdings as of

Dec 31, 2024

Filed

Feb 14, 2025

The story around this disclosure

Every dated public record OQRO holds about the company from 60 days before to 120 days after, oldest first. It shows what was going on; none of it is a stated reason for the trade.

What came next

1. May 12, 2025InsiderCEO purchased ~$107K of ASPN shares in the open market

How to read SEC Form 13F-HR

Form 13F is the quarterly report in which investment managers that oversee $100 million or more list the US-listed stocks and some other securities they held on the last day of the quarter.

Full guide: What is an SEC Form 13F?

What else is on file for Aspen Aerogels

For Aspen Aerogels, OQRO holds 1 insider filing (SEC Form 4 or Form 144) dated in the last 90 days.

These are records OQRO holds, counted by their date, not a measure of how much trading took place. Routine paperwork such as option exercises and tax withholding is left out. Everything for the company is on its ASPN page.

How this filing works

• SEC Form 13F

Other disclosures at Aspen Aerogels

• SEC Form 4Sep 25, 2026
• SEC Form 4Aug 13, 2025
• SEC Form 4Aug 13, 2025
• SEC Form 4May 13, 2025
• SEC Form 13F-HRFeb 11, 2025
• SEC Form 13F-HRFeb 10, 2025

Everything OQRO holds on this company is on its ASPN page.