How many institutional investors hold ASPN?

4 tracked institutional investors disclosed a position in ASPN (ASPEN AEROGELS INC) in their most recent 13F filing.

Who is the largest institutional holder of ASPN?

Ken Griffin, Citadel Advisors, holds the largest disclosed position in ASPN, valued at $27M.

Where does this ASPN ownership data come from?

SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.

ASPN — ASPEN AEROGELS INC

Name: ASPEN AEROGELS INC (ASPN) — Institutional Ownership
Creator: InvestorLens
License: https://www.sec.gov/about/website-policies

Public company

For educational research only.InvestorLens analyzes public regulatory filings (SEC EDGAR, STOCK Act PTRs) that may be delayed by 45 days or more. Information shown is historical and is not financial, legal, or tax advice, nor a recommendation or solicitation to buy or sell any security. Always do your own research.

InvestorLens aggregates public filing data to show which tracked investors reported holdings in this stock. Dollar values represent reported position values, not market capitalization, and may be delayed up to 45 days. Not a recommendation.

Sourced from SEC EDGAR public filings

Why are billionaires buying ASPN?

Built from public SEC filings and public economic data. Not a recommendation.

Confidence

Institutional Conviction

Strong distribution · 1 buying vs 3 selling last quarter

Macro Tailwind

Macro conditions are mixed for this sector

Why? — Evidence & Confidence ▾

Of 4 tracked investors who changed their ASPN position last quarter, 1 bought and 3 sold (25% buy-side). Macro conditions are mixed for this sector (Macro Tailwind 55/100 in a Squeeze regime).

Supporting evidence

+1 tracked investor added or increased positions last quarter (Paul Tudor Jones)
+4 tracked investors reported holding ASPN at their latest filing
+Macro Health is 55/100 in a Squeeze regime — historically acceptable for this sectorsource

Contradicting evidence — always shown

−3 tracked investors reduced or exited last quarter (3 reduced, 0 sold out)
−13F data is disclosed up to 45 days after quarter end — positions may have changed since

Know the limits

· 13F disclosure lag (up to 45 days)
· Tracked investors are a sample, not the whole market
· Sector regime fit is a historical average, not a guarantee

Every InvestorLens score shows its evidence — including what argues against it. Model conviction-v1 · generated 8/20/2026.

About ASPEN AEROGELS INC (ASPN)

ASPEN AEROGELS INC (ASPN) appears in the most recent 13F filings of 4 tracked institutional investors. The largest disclosed position is held by Ken Griffin (Citadel Advisors), valued at $27M. Across recent filings, tracked investors recorded 7 new positions, 5 increased, 10 reduced, and 5 exited. All data sourced from SEC 13F filings.

Smart Money Consensus™

Based on recent institutional activity in ASPN

/100

Mixed Activity

Added / Increased12

Reduced10

Exited5

BearishBullish

Crowded Trade Score™

How many top investors track ASPN

/100

Emerging Interest

4investors

A small number of top investors own this.

UndiscoveredCrowded

151015+

ASPN Ownership Composition

How ASPEN AEROGELS INC is held across tracked investor types, based on reported 13F positions.

Dominant Type

Multi-Strategy / Quant

75% of tracked value

Institutions

tracked investors

Total Reported

$14.3M

combined 13F value

Multi-Strategy / Quant74.8%
Macro25.2%

Multi-Strategy / Quant(3)

74.8%

Macro(1)

25.2%

Tracked investors currently reporting ASPN

Investor	Firm	Shares	Market value	% of portfolio	As of
Ken Griffin	Citadel Advisors	481.7K	$3.1M	0.00%	Jun 30, 2026
Izzy Englander	Millennium Management	1.2M	$7.5M	0.00%	Jun 30, 2026
Steve Cohen	Point72 Asset Management	15.2K	$96.4K	0.00%	Jun 30, 2026
Paul Tudor Jones	Tudor Investment Corp	567.4K	$3.6M	0.01%	Jun 30, 2026

Ken GriffinJun 30, 2026
Citadel Advisors
Shares
481.7K
Value
$3.1M
% Portfolio
0.00%
Izzy EnglanderJun 30, 2026
Millennium Management
Shares
1.2M
Value
$7.5M
% Portfolio
0.00%
Steve CohenJun 30, 2026
Point72 Asset Management
Shares
15.2K
Value
$96.4K
% Portfolio
0.00%
Paul Tudor JonesJun 30, 2026
Tudor Investment Corp
Shares
567.4K
Value
$3.6M
% Portfolio
0.01%

Recent activity

Investor	Action	Δ %	Current value	Filing date
Izzy Englander	Reduced	-91.47%	$924.6K	Nov 14, 2024
Izzy Englander	Increased	4757.81%	$19.3M	Feb 14, 2025
Izzy Englander	Reduced	-1.40%	$10.2M	May 15, 2025
Izzy Englander	Reduced	-43.31%	$5.4M	Aug 14, 2025
Izzy Englander	Reduced	-39.83%	$2.5M	Feb 17, 2026
Izzy Englander	Increased	61.28%	$4.8M	May 15, 2026
Izzy Englander	Reduced	-15.24%	$7.5M	Aug 14, 2026
Ken Griffin	Reduced	-31.97%	$21.1M	Nov 14, 2024
Ken Griffin	Reduced	-8.43%	$8.7M	May 15, 2025
Ken Griffin	Reduced	-69.94%	$2.4M	Aug 14, 2025
Ken Griffin	Sold	-100.00%	$0	Nov 14, 2025
Ken Griffin	Reduced	-40.54%	$3.1M	Aug 14, 2026
Steve Cohen	New	—	$13.1M	Feb 14, 2025
Steve Cohen	Sold	-100.00%	$0	Jul 21, 2025
Steve Cohen	New	—	$1.3M	Nov 14, 2025
Steve Cohen	Sold	-100.00%	$0	Feb 17, 2026
Steve Cohen	New	—	$877.6K	May 15, 2026
Steve Cohen	Reduced	-94.07%	$96.4K	Aug 14, 2026
Paul Tudor Jones	New	—	$2.2M	Aug 14, 2024
Paul Tudor Jones	Sold	-100.00%	$0	Nov 14, 2024
Paul Tudor Jones	New	—	$1.6M	Feb 14, 2025
Paul Tudor Jones	Increased	226.43%	$2.8M	May 15, 2025
Paul Tudor Jones	Sold	-100.00%	$0	Aug 14, 2025
Paul Tudor Jones	New	—	$3.4M	Dec 9, 2025
Paul Tudor Jones	Increased	90.84%	$516.7K	May 15, 2026
Paul Tudor Jones	Increased	275.52%	$3.6M	Aug 14, 2026
Ken Griffin	New	—	$26.8M	Aug 14, 2024

Izzy Englander
Reduced
$924.6K(-91.47%)Nov 14, 2024
Izzy Englander
Increased
$19.3M(4757.81%)Feb 14, 2025
Izzy Englander
Reduced
$10.2M(-1.40%)May 15, 2025
Izzy Englander
Reduced
$5.4M(-43.31%)Aug 14, 2025
Izzy Englander
Reduced
$2.5M(-39.83%)Feb 17, 2026
Izzy Englander
Increased
$4.8M(61.28%)May 15, 2026
Izzy Englander
Reduced
$7.5M(-15.24%)Aug 14, 2026
Ken Griffin
Reduced
$21.1M(-31.97%)Nov 14, 2024
Ken Griffin
Reduced
$8.7M(-8.43%)May 15, 2025
Ken Griffin
Reduced
$2.4M(-69.94%)Aug 14, 2025
Ken Griffin
Sold
$0(-100.00%)Nov 14, 2025
Ken Griffin
Reduced
$3.1M(-40.54%)Aug 14, 2026
Steve Cohen
New
$13.1MFeb 14, 2025
Steve Cohen
Sold
$0(-100.00%)Jul 21, 2025
Steve Cohen
New
$1.3MNov 14, 2025
Steve Cohen
Sold
$0(-100.00%)Feb 17, 2026
Steve Cohen
New
$877.6KMay 15, 2026
Steve Cohen
Reduced
$96.4K(-94.07%)Aug 14, 2026
Paul Tudor Jones
New
$2.2MAug 14, 2024
Paul Tudor Jones
Sold
$0(-100.00%)Nov 14, 2024
Paul Tudor Jones
New
$1.6MFeb 14, 2025
Paul Tudor Jones
Increased
$2.8M(226.43%)May 15, 2025
Paul Tudor Jones
Sold
$0(-100.00%)Aug 14, 2025
Paul Tudor Jones
New
$3.4MDec 9, 2025
Paul Tudor Jones
Increased
$516.7K(90.84%)May 15, 2026
Paul Tudor Jones
Increased
$3.6M(275.52%)Aug 14, 2026
Ken Griffin
New
$26.8MAug 14, 2024

Frequently asked questions

How many institutional investors hold ASPN?: 4 tracked institutional investors disclosed a position in ASPN (ASPEN AEROGELS INC) in their most recent 13F filing.
Who is the largest institutional holder of ASPN?: Ken Griffin, Citadel Advisors, holds the largest disclosed position in ASPN, valued at $27M.
Did institutional ownership of ASPN increase or decrease?: Across recent 13F filings, tracked investors recorded 7 new positions, 5 increased, 10 reduced, and 5 fully exited ASPN.
Where does this ASPN ownership data come from?: SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.