Ticker · CUSIP 04523Y105

ASPN

ASPEN AEROGELS INC

Industrials·Building Products & Equipment

···Share

Holders (tracked)

Combined shares

4,107,111

Combined value

$11.62M

Last close

$3.48

Quarter

2025Q4

Price is +23.0% vs the avg quarter-end implied price across tracked holders.

Price · 1Y$3.48-1.73 (-33.21%)H $8.82 · L $2.57 · Avg Vol 2.0M

Tracked holders · last 8 quarters

-1 vs previous quarter over the last 8.

SEC event timeline

18 events

Ken Griffin (Citadel Advisors) trimmed2026-02-17
−248,372 shares · 2025Q4
Position
D.E. Shaw & Co. added2026-02-17
+9,995 shares · 2025Q4
Position
Two Sigma Investments trimmed2026-02-17
−54,109 shares · 2025Q4
Position
Izzy Englander (Millennium Mgmt) trimmed2026-02-17
−576,566 shares · 2025Q4
Position
Steve Cohen (Point72) exited2026-02-17
−184,300 shares · 2025Q4
Position
T. Rowe Price added2026-02-17
+21,673 shares · 2025Q4
Position
Paul Tudor Jones (Tudor Investment) opened position2026-02-17
+79,171 shares · 2025Q4
Position
AQR Capital Management added2026-02-17
+192,144 shares · 2025Q4
Position
Renaissance Technologies exited2026-02-12
−246,900 shares · 2025Q4
Position
First Eagle Investment Management added2026-02-04
+105,164 shares · 2025Q4
Position
Steve Cohen (Point72) opened position2025-11-14
+184,300 shares · 2025Q3
Position
T. Rowe Price added2025-11-14
+5,749 shares · 2025Q3
Position
Izzy Englander (Millennium Mgmt) added2025-11-14
+540,772 shares · 2025Q3
Position
Two Sigma Investments added2025-11-14
+40,221 shares · 2025Q3
Position
AQR Capital Management trimmed2025-11-14
−12,026 shares · 2025Q3
Position
D.E. Shaw & Co. trimmed2025-11-14
−7,500 shares · 2025Q3
Position
Renaissance Technologies trimmed2025-11-13
−432,300 shares · 2025Q3
Position
First Eagle Investment Management opened position2025-11-12
+517,323 shares · 2025Q3
Position

Insider activity

No insider transactions in the last 30 days.

View full insider history for ASPN →

Follow-the-investor returns

If you'd copied each holder of ASPN…

Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.

Investor	First in	Cost basis	Return	Position value today
Paul Tudor Jones (Tudor Investment)	2023Q1	$3.42	+1.9%	$276K
Ken Griffin (Citadel Advisors)	2017Q1	$3.67	-5.1%	$608K
Ken Griffin (Citadel Advisors)	2017Q1	$3.67	-5.1%	$608K
Ken Griffin (Citadel Advisors)	2017Q1	$3.67	-5.1%	$608K
AQR Capital Management	2020Q4	$5.01	-30.5%	$1.3M
First Eagle Investment Management	2025Q3	$6.26	-44.4%	$2.2M
T. Rowe Price	2016Q1	$9.65	-63.9%	$342K
Izzy Englander (Millennium Mgmt)	2016Q4	$10.19	-65.8%	$3.0M
Two Sigma Investments	2022Q1	$10.40	-66.5%	$2.6M
D.E. Shaw & Co.	2021Q4	$12.99	-73.2%	$81K

Who moved on this name in 2025Q4

Position changes reported for the latest quarter, grouped by direction.

New positions1

Paul Tudor Jones (Tudor Investment)
+79,171
$224K

Added to4

AQR Capital Management
+192,144
$544K
First Eagle Investment Management
+105,164
$298K
D.E. Shaw & Co.
+9,995
$28K
T. Rowe Price
+21,673
$62

Trimmed3

Izzy Englander (Millennium Mgmt)
−576,566
$1.6M
Ken Griffin (Citadel Advisors)
−248,372
$703K
Two Sigma Investments
−54,109
$153K

Exited2

Renaissance Technologies
−246,900
$1.7M
Steve Cohen (Point72)
−184,300
$1.3M

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.

Quarter	Holders	Shares	Combined value	Δ holders
2022Q1	9	2,774,786	$95.7M	—
2022Q2	10	3,184,766	$31.5M	+1
2022Q3	9	3,808,169	$35.1M	-1
2022Q4	9	5,435,465	$64.1M	—
2023Q1	10	6,616,729	$49.3M	+1
2023Q2	9	5,394,811	$42.6M	-1
2023Q3	7	5,247,396	$45.1M	-2
2023Q4	6	4,774,492	$75.3M	-1
2024Q1	7	5,088,748	$89.6M	+1
2024Q2	11	7,497,450	$178.8M	+4
2024Q3	10	1,229,720	$34.1M	-1
2024Q4	10	5,746,196	$68.3M	—
2025Q1	12	5,301,853	$33.9M	+2
2025Q2	9	3,047,214	$18.0M	-3
2025Q3	11	4,922,111	$34.3M	+2
2025Q4	10	4,107,111	$11.6M	-1

Who owns ASPN

10 super-investors · 2025Q4

Tracked stake

4.11M

Combined value

$12M

% of shares outstanding

—

shares-out unknown

Quarter action mix

New1Added4Trim5

#	Manager	Shares	Value	% of book	Last action
1	Izzy Englander Millennium Mgmt	871.0K	$2M	0.0%	Trim−576.6K
2	Ken Griffin Citadel Advisors	866.2K	$2M	0.0%	Trim−248.4K
3	Two Sigma Investments	757.4K	$2M	0.0%	Trim−54.1K
4	First Eagle Investment Management	622.5K	$2M	0.0%	Added+105.2K
5	AQR Capital Management	369.9K	$1M	0.0%	Added+192.1K
6	Ken Griffin Citadel Advisors	244.6K	$692K	0.0%	Trim−248.4K
7	Ken Griffin Citadel Advisors	174.8K	$495K	0.0%	Trim−248.4K
8	T. Rowe Price	98.3K	$279K	0.0%	Added+21.7K
9	Paul Tudor Jones Tudor Investment	79.2K	$224K	0.0%	New+79.2K
10	D.E. Shaw & Co.	23.2K	$66K	0.0%	Added+10.0K

Recent moves

20 transactions

NEWPaul Tudor Jones (Tudor Investment)
+79,171 · 2025Q4
ADDD.E. Shaw & Co.
+9,995 · 2025Q4
TRIMIzzy Englander (Millennium Mgmt)
−576,566 · 2025Q4
SOLDSteve Cohen (Point72)
−184,300 · 2025Q4
TRIMKen Griffin (Citadel Advisors)
−248,372 · 2025Q4
ADDAQR Capital Management
+192,144 · 2025Q4
ADDT. Rowe Price
+21,673 · 2025Q4
TRIMTwo Sigma Investments
−54,109 · 2025Q4
SOLDRenaissance Technologies
−246,900 · 2025Q4
ADDFirst Eagle Investment Management
+105,164 · 2025Q4
NEWSteve Cohen (Point72)
+184,300 · 2025Q3
TRIMAQR Capital Management
−12,026 · 2025Q3
TRIMD.E. Shaw & Co.
−7,500 · 2025Q3
ADDIzzy Englander (Millennium Mgmt)
+540,772 · 2025Q3
ADDT. Rowe Price
+5,749 · 2025Q3
ADDTwo Sigma Investments
+40,221 · 2025Q3
TRIMRenaissance Technologies
−432,300 · 2025Q3
NEWFirst Eagle Investment Management
+517,323 · 2025Q3
TRIMD.E. Shaw & Co.
−4,067 · 2025Q2
TRIMIzzy Englander (Millennium Mgmt)
−692,647 · 2025Q2

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