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ASPN · Aspen Aerogels Inc

Industrials · −3.9% on Oct 16

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Updated Oct 17 · 9 feeds behind: FDA drug approvals, 1 day, and 8 more · Every feed →

On this page

The market view

Price chart

The interactive ASPN chart (by TradingView) loads here.

Our take

2 rules fired on ASPN

In short: none of these rules has solid or some evidence yet, so they show no clear lean on ASPN.

How each did in past tests, against similar stocks over 3 months. Past results don't predict future ones.

The 0–100 score for ASPN, and which of these rules are open on it right now
Members see one number for how strongly these rules agree on ASPN, and the day each rule fired. Better-tested rules count more, and so do different kinds of filings that point the same way.
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Compare with this company’s history

Is disclosure activity unusual?

See how many different insiders or members of Congress reported purchases or sales of ASPN. Each bar covers 28 days, by disclosure date. Several trades by one person count once in each group and period.

Latest period: Sep 21, 2026–Oct 18, 2026 · UTC dates · today is excluded

Insider sales

Short history

Only 0 earlier periods are on file to compare with. We need at least 6 full periods before calling a count unusual.

Latest 28 days
2
Earlier median
—
Earlier range
—
Distinct filers per 28 daysScale: 0–2
Oct 20, 2025Oct 18, 2026
Earlier periodsLatest 28 daysLimited or missing history

Who appears in the latest period?

Up to three filers; one example disclosure each.

Inspect this period’s filings

The history behind this view

First stored company disclosure: Sep 24, 2026. Newest disclosure across this feed: Oct 16, 2026.

Earlier periods in the comparison: 0. Outlined periods are missing data, so they are left out of the comparison. The chart scale changes with the category.

Exact counts, dates and filings for all four categories
Insider purchases · Short history

Only 0 earlier periods are on file to compare with. We need at least 6 full periods before calling a count unusual. Earlier median: —; range: unavailable.

Insider purchases: distinct filers in stored disclosures
Period and filingsFilersHistory
Oct 20, 2025–Nov 16, 2025—Unavailable
Nov 17, 2025–Dec 14, 2025—Unavailable
Dec 15, 2025–Jan 11, 2026—Unavailable
Jan 12, 2026–Feb 8, 2026—Unavailable
Feb 9, 2026–Mar 8, 2026—Unavailable
Mar 9, 2026–Apr 5, 2026—Unavailable
Apr 6, 2026–May 3, 2026—Unavailable
May 4, 2026–May 31, 2026—Unavailable
Jun 1, 2026–Jun 28, 2026—Unavailable
Jun 29, 2026–Jul 26, 2026—Unavailable
Jul 27, 2026–Aug 23, 2026—Unavailable
Aug 24, 2026–Sep 20, 2026—Unavailable
Sep 21, 2026–Oct 18, 2026Latest period0Partial; excluded
Insider sales · Short history

Only 0 earlier periods are on file to compare with. We need at least 6 full periods before calling a count unusual. Earlier median: —; range: unavailable.

Insider sales: distinct filers in stored disclosures
Period and filingsFilersHistory
Oct 20, 2025–Nov 16, 2025—Unavailable
Nov 17, 2025–Dec 14, 2025—Unavailable
Dec 15, 2025–Jan 11, 2026—Unavailable
Jan 12, 2026–Feb 8, 2026—Unavailable
Feb 9, 2026–Mar 8, 2026—Unavailable
Mar 9, 2026–Apr 5, 2026—Unavailable
Apr 6, 2026–May 3, 2026—Unavailable
May 4, 2026–May 31, 2026—Unavailable
Jun 1, 2026–Jun 28, 2026—Unavailable
Jun 29, 2026–Jul 26, 2026—Unavailable
Jul 27, 2026–Aug 23, 2026—Unavailable
Aug 24, 2026–Sep 20, 2026—Unavailable
Sep 21, 2026–Oct 18, 2026Latest period2Partial; excluded
Congress purchases · History unavailable

No completed-period disclosures for this company are available in this source. Missing history is not zero activity. Earlier median: —; range: unavailable.

Congress purchases: distinct filers in stored disclosures
Period and filingsFilersHistory
Oct 20, 2025–Nov 16, 2025—Unavailable
Nov 17, 2025–Dec 14, 2025—Unavailable
Dec 15, 2025–Jan 11, 2026—Unavailable
Jan 12, 2026–Feb 8, 2026—Unavailable
Feb 9, 2026–Mar 8, 2026—Unavailable
Mar 9, 2026–Apr 5, 2026—Unavailable
Apr 6, 2026–May 3, 2026—Unavailable
May 4, 2026–May 31, 2026—Unavailable
Jun 1, 2026–Jun 28, 2026—Unavailable
Jun 29, 2026–Jul 26, 2026—Unavailable
Jul 27, 2026–Aug 23, 2026—Unavailable
Aug 24, 2026–Sep 20, 2026—Unavailable
Sep 21, 2026–Oct 18, 2026Latest period—Unavailable
Congress sales · History unavailable

No completed-period disclosures for this company are available in this source. Missing history is not zero activity. Earlier median: —; range: unavailable.

Congress sales: distinct filers in stored disclosures
Period and filingsFilersHistory
Oct 20, 2025–Nov 16, 2025—Unavailable
Nov 17, 2025–Dec 14, 2025—Unavailable
Dec 15, 2025–Jan 11, 2026—Unavailable
Jan 12, 2026–Feb 8, 2026—Unavailable
Feb 9, 2026–Mar 8, 2026—Unavailable
Mar 9, 2026–Apr 5, 2026—Unavailable
Apr 6, 2026–May 3, 2026—Unavailable
May 4, 2026–May 31, 2026—Unavailable
Jun 1, 2026–Jun 28, 2026—Unavailable
Jun 29, 2026–Jul 26, 2026—Unavailable
Jul 27, 2026–Aug 23, 2026—Unavailable
Aug 24, 2026–Sep 20, 2026—Unavailable
Sep 21, 2026–Oct 18, 2026Latest period—Unavailable
How to read this comparison

The median is the middle count in up to 12 earlier, non-overlapping 28-day periods; the range runs from the smallest to the largest count. The latest period is excluded from both. A comparison needs at least 6 earlier periods, including 3 with activity. The feed’s latest disclosure must be within 7 days of the current period’s end. This freshness check does not verify complete collection.

Insiders include individuals and reporting entities; only purchase and sale codes enter this view. Congress counts reporting members, including their disclosed family transactions. The same filer can appear in purchases and sales, so these categories should not be added into a net count.

These are stored disclosures, not a complete measure of trading. Reporting delays and collection gaps can change the comparison. More activity does not identify a motive or predict a stock’s return.

Company timeline

What has been happening?

May 1, 2026–Oct 16, 2026. Select a month in a category to inspect its records.

Company filings

Insiders

Owners & lobbying

All 9 records in this snapshot
  1. Disclosed
    Koch, Inc. · Sale

    Transaction dated Sep 23, 2026

  2. Filed
  3. Disclosed
    Wood River Capital, LLC · Sale

    Transaction dated Sep 23, 2026

  4. Filed
  5. Filed
  6. Filed
  7. Filed
  8. Filed
  9. Filed

Month counts include every record on file. The lists show the newest records on this page. A dash means none on file that month. Trades use disclosure dates; contract dates follow the source record. Nearby events do not establish the cause of a price move.

Who's buying and selling · last 90 days

Congress

No Congress trades on ASPN disclosed in the last 90 days.

See every Congress trade on ASPN →

Company insiders

0 buys · 2 sells · $116M sold

  1. ▼ SELLKoch, Inc. 10% ownerASPN Aspen Aerogels Inc$58.1Mdisclosed Sep 24 · filed 1 day after the trade
  2. ▼ SELLWood River Capital, LLC InsiderASPN Aspen Aerogels Inc$58.1Mdisclosed Sep 24 · filed 1 day after the trade
See every insider trade on ASPN →

Big holders (Schedule 13D / 13G): 1 filing in the last 90 days · newest: Wood River Capital, LLC (13D amendment), Sep 24, 2026 ↗

Filings & events

Company filings (8-K) 79

Events the company must report to the SEC within days — results, deals, departures, restatements.

What it files 8-Ks about

  • Shared information with investors · item 7.0118
  • Quarterly or yearly results · item 2.0210
  • Directors or officers joined, left or got new pay · item 5.028
  • Signed a major agreement · item 1.014
  • Shareholder vote results · item 5.073
  • Other events · item 8.013

Filing red flags 16

Warning signs in the company's own SEC filings — going-concern doubts, control weaknesses, staff comment letters, late filings, restatements, Wells notices, clinical holds, dividend cuts.

FDA and clinical trials 4

Drug approvals, recalls, clinical-trial updates and FDA advisory meetings.

Lobbying 1

Lobbying reports filed with the Senate for the company.

$40K across 1 report

Issues named in the most reports

  • Energy/Nuclear 1

Planned insider sales (Form 144) 9

Notices insiders file before they sell certain shares, such as ones they got straight from the company.

1 in the last 90 days · 9 notices on file

The notices on file don't give the sale's size; each sale shows up under company insiders once it is reported.

5% owners (13D / 13G) 2

Investors who reported owning 5% or more — 13D for owners who may push for changes, 13G for owners who just hold.

Push for changes, or just hold?

  • 13D, may push for changes: 1 filing
  • 13G, just holds: 1 filing

Filed by Wood River Capital, LLC · Needham Investment Management LLC

Biggest named funds (13F)

The largest ASPN holdings among the well-known funds whose quarterly 13F filings we read — opens here.

Every disclosed trade on ASPN

  1. ▼ SELLKoch, Inc. 10% ownerASPN Aspen Aerogels Inc$58.1Mdisclosed Sep 24 · filed 1 day after the trade
  2. ▼ SELLWood River Capital, LLC InsiderASPN Aspen Aerogels Inc$58.1Mdisclosed Sep 24 · filed 1 day after the trade
See the trades on ASPN in the feed →
People & votes

Which members of Congress traded ASPN, sponsored bills that touch it and voted on them — opens here.