InsiderSource
ASPN

ASPEN AEROGELS INC

SEC CIK 1145986
$5.89 +79.0% · 90 days
90-day buys
$0
0 open-market
90-day sells
$0
0 open-market
Net insider flow
+$0
Net buying
Filings shown
30
Most recent
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At a glance

Insiders at ASPN have made no open-market trades in the last 90 days — the activity below is grants, option exercises, and other routine filings.

Largest recent trade: Young Donald R sold $183.6K of ASPN, trimming their stake 10%.

Most active filer: Young Donald R, with 5 transactions among the recent filings shown.

Insider transaction history

Form 4 filings for ASPN, newest first
View on SEC EDGAR ↗
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ASPN
ASPEN AEROGELS INC
Tax withholding Young Donald R · Director, President and CEO · Tax withholding · filed Mar 10, 2026 ΔOwn −0.7%
−$13.8K
4,275 sh @ $3
ASPN
ASPEN AEROGELS INC
Tax withholding Landes Gregg · Chief Operating Officer · Tax withholding · filed Mar 10, 2026 ΔOwn −1.8%
−$6.2K
1,924 sh @ $3
ASPN
ASPEN AEROGELS INC
Tax withholding Young Donald R · Director, President and CEO · Tax withholding · filed Mar 6, 2026 ΔOwn −1.3%
−$28.2K
8,618 sh @ $3
ASPN
ASPEN AEROGELS INC
Tax withholding Landes Gregg · SVP, Operations and Strat Deve · Tax withholding · filed Mar 6, 2026 ΔOwn −3.5%
−$12.5K
3,814 sh @ $3
ASPN
ASPEN AEROGELS INC
Sell Young Donald R · Director, President and CEO · Open-market sale · filed Nov 14, 2025 ΔOwn −10%

Young Donald R sold $183.6K of ASPN, trimming their stake 10%.

−$183.6K
56,845 sh @ $3
ASPN
ASPEN AEROGELS INC
Sell Daniel Santhosh P · Chief Accounting Officer · Open-market sale · filed Aug 13, 2025 ΔOwn −10%

Daniel Santhosh P sold $15.1K of ASPN, trimming their stake 10%.

−$15.1K
2,000 sh @ $8
ASPN
ASPEN AEROGELS INC
Sell Daniel Santhosh P · Chief Accounting Officer · Open-market sale · filed Aug 13, 2025 ΔOwn −18%

Daniel Santhosh P sold $32.2K of ASPN, trimming their stake 18%.

−$32.2K
4,410 sh @ $7
ASPN
ASPEN AEROGELS INC
Buy Young Donald R · Director, President and CEO · Open-market purchase · filed May 12, 2025 ΔOwn +3.8%

Young Donald R, ASPN's CEO, spent $107K of their own money on 20,000 shares at $5, growing their stake 4%.

+$107K
20,000 sh @ $5
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About ASPN insider activity

This page tracks every recent Form 4 filed for ASPEN AEROGELS INC with the U.S. Securities and Exchange Commission. Form 4 is the disclosure that company insiders — officers, directors, and holders of more than 10% of the stock — must file within two business days of buying or selling shares.

The summary above nets open-market purchases against open-market sales over the trailing 90 days. Open-market trades (codes P and S) tend to carry the most signal because they reflect a deliberate choice to put money in or take it out, as opposed to routine grants, option exercises, or tax-withholding events. Use the badges on each row to tell them apart, and always confirm details against the original filing before drawing conclusions.

Frequently asked questions

How often is ASPN insider data updated?

Continuously. We read from SEC EDGAR, so new Form 4 filings for ASPEN AEROGELS INC usually appear here within minutes of being accepted by the SEC.

What does "net insider flow" mean?

It is the total dollar value of open-market insider purchases minus open-market sales over the last 90 days. A positive number (green) means insiders bought more than they sold; a negative number (red) means the reverse.

Why do some rows show grants or option exercises instead of buys?

Insiders receive stock through compensation as well as buying it outright. Form 4 captures all of these. We label each transaction by its SEC code so you can focus on open-market activity if you prefer.

Is this investment advice?

No. InsiderSource presents public filing data for informational purposes only. Insider activity is one of many factors to consider and is never a recommendation to buy or sell.