ASPN

Aspen Aerogels INC

Insider trading activity for Aspen Aerogels INC, straight from SEC Form 4 filings. Net figures below count open-market buys and sales only — grants, option exercises and tax withholding are excluded because they are compensation, not decisions to trade.

Past 3 months

-$58.1M

net selling

Bought(0 · 0 insiders): $0
Sold(1 · 1 insiders): $58.1M

Past 6 months

-$58.1M

net selling

Bought(0 · 0 insiders): $0
Sold(1 · 1 insiders): $58.1M

Past 12 months

-$58.3M

net selling

Bought(0 · 0 insiders): $0
Sold(2 · 2 insiders): $58.3M

Transaction history

The 53 most recent Form 4 transactions.

Open in screener →

Insider transactions, newest first: date, security, transaction type, size and a link to the filing each row came from.
Date	Insider	Role	Type	Shares	Price	Value	Δ Own	Filing
Sep 23	Wood River Capital, LLC	Former 10% Owner	SSELL	12.3M	$4.73	$58.1M	-100.0%	Open the original filing on SEC.gov
Jun 23	Noglows William P	Director	MEXER◆	14,799	—	—	—	Open the original filing on SEC.gov
Jun 23	Noglows William P	Director	MEXER	14,799	$4.75	$70.3K	+14.9%	Open the original filing on SEC.gov
May 13	Mitchell Steven R	Director	AGRANT◆	8,706	—	—	—	Open the original filing on SEC.gov
May 13	Mitchell Steven R	Director	AGRANT	10,370	—	—	+7.1%	Open the original filing on SEC.gov
May 13	Sweetnam James E	Director	AGRANT◆	8,706	—	—	—	Open the original filing on SEC.gov
May 13	Sweetnam James E	Director	AGRANT	10,370	—	—	+40.0%	Open the original filing on SEC.gov
May 13	Noglows William P	Director	AGRANT◆	8,706	—	—	—	Open the original filing on SEC.gov
May 13	Noglows William P	Director	AGRANT	10,370	—	—	+11.7%	Open the original filing on SEC.gov
May 13	Kool Kathleen	Director	AGRANT◆	8,706	—	—	—	Open the original filing on SEC.gov
May 13	Kool Kathleen	Director	AGRANT	10,370	—	—	+43.3%	Open the original filing on SEC.gov
May 13	Robinson Cari	Director	AGRANT◆	8,706	—	—	—	Open the original filing on SEC.gov
May 13	Robinson Cari	Director	AGRANT	10,370	—	—	+84.7%	Open the original filing on SEC.gov
Mar 8	Young Donald R	President and CEO	FTAX	4,275	$3.22	$13.8K	-0.7%	Open the original filing on SEC.gov
Mar 8	Whitaker Corby C	Chief Commercial Officer	FTAX	1,924	$3.22	$6.2K	-0.9%	Open the original filing on SEC.gov
Mar 8	Thoele Grant Douglas	CFO & Treasurer	FTAX	590	$3.22	$1.9K	-0.8%	Open the original filing on SEC.gov
Mar 8	Landes Gregg	Chief Operating Officer	FTAX	1,924	$3.22	$6.2K	-1.8%	Open the original filing on SEC.gov
Mar 5	Young Donald R	President and CEO	FTAX	8,618	$3.27	$28.2K	-1.3%	Open the original filing on SEC.gov
Mar 5	Landes Gregg	SVP, Operations and…	FTAX	3,814	$3.27	$12.5K	-3.5%	Open the original filing on SEC.gov
Mar 5	Whitaker Corby C	SVP, Sales and Marketing	FTAX	3,907	$3.27	$12.8K	-1.8%	Open the original filing on SEC.gov
Mar 5	Daniel Santhosh P	Chief Accounting Officer	FTAX	986	$3.27	$3.2K	-6.0%	Open the original filing on SEC.gov
Mar 5	Thoele Grant Douglas	CFO & Treasurer	FTAX	2,368	$3.27	$7.7K	-2.9%	Open the original filing on SEC.gov
Mar 4	Young Donald R	President and CEO	AGRANT◆	212,249	—	—	—	Open the original filing on SEC.gov
Mar 4	Young Donald R	President and CEO	AGRANT	156,716	—	—	+31.7%	Open the original filing on SEC.gov
Mar 4	Landes Gregg	SVP, Operations and…	AGRANT◆	77,824	—	—	—	Open the original filing on SEC.gov
Mar 4	Landes Gregg	SVP, Operations and…	AGRANT	57,462	—	—	+112.2%	Open the original filing on SEC.gov
Mar 4	Deegan Glenn E.	CAO, GC & Corp Secretary	AGRANT◆	75,171	—	—	—	Open the original filing on SEC.gov
Mar 4	Deegan Glenn E.	CAO, GC & Corp Secretary	AGRANT	55,503	—	—	+475.5%	Open the original filing on SEC.gov
Mar 4	Whitaker Corby C	SVP, Sales and Marketing	AGRANT◆	77,824	—	—	—	Open the original filing on SEC.gov
Mar 4	Whitaker Corby C	SVP, Sales and Marketing	AGRANT	57,462	—	—	+37.4%	Open the original filing on SEC.gov
Mar 4	Thoele Grant Douglas	CFO & Treasurer	AGRANT◆	74,893	—	—	—	Open the original filing on SEC.gov
Mar 4	Thoele Grant Douglas	CFO & Treasurer	AGRANT	55,298	—	—	+217.8%	Open the original filing on SEC.gov
Nov 13, 2025	Young Donald R	President and CEO	SSELL◷	56,845	$3.23	$183.6K	-10.3%	Open the original filing on SEC.gov
Oct 1, 2025	Thoele Grant Douglas	CFO & Treasurer	AGRANT↺	10,273	—	—	+68.0%	Open the original filing on SEC.gov
Sep 30, 2025	Deegan Glenn E.	CAO, GC & Corp Secretary	AGRANT◆	23,347	—	—	—	Open the original filing on SEC.gov
Sep 30, 2025	Deegan Glenn E.	CAO, GC & Corp Secretary	AGRANT◆	16,416	—	—	—	Open the original filing on SEC.gov
Sep 30, 2025	Deegan Glenn E.	CAO, GC & Corp Secretary	AGRANT	11,673	—	—	—	Open the original filing on SEC.gov
Sep 13, 2025	Daniel Santhosh P	Chief Accounting Officer	FTAX	1,563	$6.59	$10.3K	-8.7%	Open the original filing on SEC.gov
Sep 5, 2025	Pittman Stephanie	Chief Human Resources…	FTAX	1,581	$6.61	$10.5K	-3.6%	Open the original filing on SEC.gov
Aug 13, 2025	Daniel Santhosh P	Chief Accounting Officer	SSELL	2,000	$7.54	$15.1K	-10.1%	Open the original filing on SEC.gov
Aug 12, 2025	Daniel Santhosh P	Chief Accounting Officer	SSELL	4,410	$7.31	$32.2K	-18.2%	Open the original filing on SEC.gov
May 23, 2025	Johnson Virginia	CLO, GC, and Secretary	FTAX	6,129	$6.39	$39.2K	-12.1%	Open the original filing on SEC.gov
May 12, 2025	Young Donald R	President and CEO	PBUY	20,000	$5.35	$107K	+3.8%	Open the original filing on SEC.gov
Apr 30, 2025	Mitchell Steven R	Director	AGRANT◆	9,105	—	—	—	Open the original filing on SEC.gov
Apr 30, 2025	Mitchell Steven R	Director	AGRANT	10,370	—	—	+7.6%	Open the original filing on SEC.gov
Apr 30, 2025	Sweetnam James E	Director	AGRANT◆	9,105	—	—	—	Open the original filing on SEC.gov
Apr 30, 2025	Sweetnam James E	Director	AGRANT	10,370	—	—	+66.6%	Open the original filing on SEC.gov
Apr 30, 2025	Robinson Cari	Director	AGRANT◆	9,105	—	—	—	Open the original filing on SEC.gov
Apr 30, 2025	Robinson Cari	Director	AGRANT	10,370	—	—	+552.8%	Open the original filing on SEC.gov
Apr 30, 2025	Kool Kathleen	Director	AGRANT◆	9,105	—	—	—	Open the original filing on SEC.gov
Apr 30, 2025	Kool Kathleen	Director	AGRANT	10,370	—	—	+76.3%	Open the original filing on SEC.gov
Apr 30, 2025	Noglows William P	Director	AGRANT◆	9,105	—	—	—	Open the original filing on SEC.gov
Apr 30, 2025	Noglows William P	Director	AGRANT	10,370	—	—	+13.2%	Open the original filing on SEC.gov

SSELL$58.1M

Wood River Capital, LLC · Former 10% OwnerSep 23

12.3M sh @ $4.73 · -100.0% own

MEXER◆—

Noglows William P · DirectorJun 23

14,799 sh

MEXER$70.3K

Noglows William P · DirectorJun 23

14,799 sh @ $4.75 · +14.9% own

AGRANT◆—

Mitchell Steven R · DirectorMay 13

8,706 sh

AGRANT—

Mitchell Steven R · DirectorMay 13

10,370 sh · +7.1% own

AGRANT◆—

Sweetnam James E · DirectorMay 13

8,706 sh

AGRANT—

Sweetnam James E · DirectorMay 13

10,370 sh · +40.0% own

AGRANT◆—

Noglows William P · DirectorMay 13

8,706 sh

AGRANT—

Noglows William P · DirectorMay 13

10,370 sh · +11.7% own

AGRANT◆—

Kool Kathleen · DirectorMay 13

8,706 sh

AGRANT—

Kool Kathleen · DirectorMay 13

10,370 sh · +43.3% own

AGRANT◆—

Robinson Cari · DirectorMay 13

8,706 sh

AGRANT—

Robinson Cari · DirectorMay 13

10,370 sh · +84.7% own

FTAX$13.8K

Young Donald R · President and CEOMar 8

4,275 sh @ $3.22 · -0.7% own

FTAX$6.2K

Whitaker Corby C · Chief Commercial…Mar 8

1,924 sh @ $3.22 · -0.9% own

FTAX$1.9K

Thoele Grant Douglas · CFO & TreasurerMar 8

590 sh @ $3.22 · -0.8% own

FTAX$6.2K

Landes Gregg · Chief Operating…Mar 8

1,924 sh @ $3.22 · -1.8% own

FTAX$28.2K

Young Donald R · President and CEOMar 5

8,618 sh @ $3.27 · -1.3% own

FTAX$12.5K

Landes Gregg · SVP, Operations…Mar 5

3,814 sh @ $3.27 · -3.5% own

FTAX$12.8K

Whitaker Corby C · SVP, Sales and…Mar 5

3,907 sh @ $3.27 · -1.8% own

FTAX$3.2K

Daniel Santhosh P · Chief Accounting…Mar 5

986 sh @ $3.27 · -6.0% own

FTAX$7.7K

Thoele Grant Douglas · CFO & TreasurerMar 5

2,368 sh @ $3.27 · -2.9% own

AGRANT◆—

Young Donald R · President and CEOMar 4

212,249 sh

AGRANT—

Young Donald R · President and CEOMar 4

156,716 sh · +31.7% own

AGRANT◆—

Landes Gregg · SVP, Operations…Mar 4

77,824 sh

AGRANT—

Landes Gregg · SVP, Operations…Mar 4

57,462 sh · +112.2% own

AGRANT◆—

Deegan Glenn E. · CAO, GC & Corp…Mar 4

75,171 sh

AGRANT—

Deegan Glenn E. · CAO, GC & Corp…Mar 4

55,503 sh · +475.5% own

AGRANT◆—

Whitaker Corby C · SVP, Sales and…Mar 4

77,824 sh

AGRANT—

Whitaker Corby C · SVP, Sales and…Mar 4

57,462 sh · +37.4% own

AGRANT◆—

Thoele Grant Douglas · CFO & TreasurerMar 4

74,893 sh

AGRANT—

Thoele Grant Douglas · CFO & TreasurerMar 4

55,298 sh · +217.8% own

SSELL◷$183.6K

Young Donald R · President and CEONov 13, 2025

56,845 sh @ $3.23 · -10.3% own

AGRANT↺—

Thoele Grant Douglas · CFO & TreasurerOct 1, 2025

10,273 sh · +68.0% own

AGRANT◆—

Deegan Glenn E. · CAO, GC & Corp…Sep 30, 2025

23,347 sh

AGRANT◆—

Deegan Glenn E. · CAO, GC & Corp…Sep 30, 2025

16,416 sh

AGRANT—

Deegan Glenn E. · CAO, GC & Corp…Sep 30, 2025

11,673 sh

FTAX$10.3K

Daniel Santhosh P · Chief Accounting…Sep 13, 2025

1,563 sh @ $6.59 · -8.7% own

FTAX$10.5K

Pittman Stephanie · Chief Human…Sep 5, 2025

1,581 sh @ $6.61 · -3.6% own

SSELL$15.1K

Daniel Santhosh P · Chief Accounting…Aug 13, 2025

2,000 sh @ $7.54 · -10.1% own

SSELL$32.2K

Daniel Santhosh P · Chief Accounting…Aug 12, 2025

4,410 sh @ $7.31 · -18.2% own

FTAX$39.2K

Johnson Virginia · CLO, GC, and…May 23, 2025

6,129 sh @ $6.39 · -12.1% own

PBUY$107K

Young Donald R · President and CEOMay 12, 2025

20,000 sh @ $5.35 · +3.8% own

AGRANT◆—

Mitchell Steven R · DirectorApr 30, 2025

9,105 sh

AGRANT—

Mitchell Steven R · DirectorApr 30, 2025

10,370 sh · +7.6% own

AGRANT◆—

Sweetnam James E · DirectorApr 30, 2025

9,105 sh

AGRANT—

Sweetnam James E · DirectorApr 30, 2025

10,370 sh · +66.6% own

AGRANT◆—

Robinson Cari · DirectorApr 30, 2025

9,105 sh

AGRANT—

Robinson Cari · DirectorApr 30, 2025

10,370 sh · +552.8% own

AGRANT◆—

Kool Kathleen · DirectorApr 30, 2025

9,105 sh

AGRANT—

Kool Kathleen · DirectorApr 30, 2025

10,370 sh · +76.3% own

AGRANT◆—

Noglows William P · DirectorApr 30, 2025

9,105 sh

AGRANT—

Noglows William P · DirectorApr 30, 2025

10,370 sh · +13.2% own

Filing record

How quickly insiders here report their trades. Section 16 allows two business days from the transaction.

All 28 filings we hold were filed within the two-business-day deadline.

Counted in business days from the transaction date, or the deemed execution date where the filing reports one, excluding weekends and federal holidays. How this is measured · All late filings

Insiders at this company

Everyone who has filed a Form 4 for this issuer.

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