Aspen Aerogels ASPN Insider Ownership

NYSE ASPN
$4.84 -0.07 (-1.32%)
As of: Sep 9, 2026 · 3:59 PM EDT

Insider Holdings by Owner

16.66Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026
Insider Ownership
0.139%
■0% pp QoQ
Shares Held by Insiders
114.16K
filed for Sep 2026
■0.00% QoQ
Shares Outstanding
82.40Mn
82,399,599 shares
Direct Holdings
114.16K
Indirect: 0
Net Shares Traded (QoQ)
0
no net change in Sep 2026
Insiders Holding Shares
22
with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding
Latest —
Average ownership —
Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold
Latest quarter —
Net over range —
Buying quarters —

Insider Ownership Summary

Quarter ending 30 Sep, 2026

ASPN's three largest insider shareholders as of September 09, 2026 are River Capital, Llc Wood (TenPercentOwner, 12.28Mn shares), River Capital, Llc Wood (TenPercentOwner, 12.28Mn shares), Industries Inc Koch (TenPercentOwner, 1.79Mn shares).

Form 4 Holdings

Insiders Holding ASPN

Insiders 22
Shares held 16.66Mn
Of outstanding 20.21%
# Insider Position Direct Indirect Total Share of Insiders Last Filed
1 River Capital, Llc Wood TenPercentOwner 12,280,426 0 12,280,426 73.7% 15 May, 2024
2 Industries Inc Koch TenPercentOwner 0 1,791,986 1,791,986 10.8% 30 Mar, 2022
3 Donald R Young President And Ceo 637,834 0 637,834 3.8% 10 Mar, 2026
4 Robert M. Gervis Director 355,182 0 355,182 2.1% 06 Jun, 2022
5 Corby C Whitaker Chief Commercial Officer 205,315 0 205,315 1.2% 10 Mar, 2026
6 Steven R Mitchell Director 156,898 0 156,898 0.9% 14 May, 2026
7 John F Fairbanks Vp, Cfo And Treasurer 141,277 0 141,277 0.8% 01 Mar, 2022
8 Kelley Conte Senior Vice President, Hr 128,183 0 128,183 0.8% 02 Jun, 2023
9 Mark L Noetzel Director 121,220 0 121,220 0.7% 31 May, 2024
10 William P Noglows Director 114,156 0 114,156 0.7% 26 Jun, 2026
11 Gregg Landes Chief Operating Officer 102,931 0 102,931 0.6% 10 Mar, 2026
12 George L Gould Chief Technology Officer 95,381 0 95,381 0.6% 25 Feb, 2022
13 Richard F Reilly Director 79,231 0 79,231 0.5% 06 Jun, 2022
14 Grant Douglas Thoele Cfo Treasurer 77,732 0 77,732 0.5% 10 Mar, 2026
15 Glenn E. Deegan Cao, Gc Corp Secretary 67,176 0 67,176 0.4% 06 Mar, 2026
16 Rebecca Blalock Director 63,175 0 63,175 0.4% 31 May, 2024
17 Ricardo C. Rodriguez Cfo Treasurer 57,311 0 57,311 0.3% 11 Mar, 2025
18 Virginia Johnson Clo, Gc, And Secretary 44,450 0 44,450 0.3% 27 May, 2025
19 Stephanie Pittman Chief Human Resources Officer 42,257 0 42,257 0.3% 08 Sep, 2025
20 James E Sweetnam Director 36,321 0 36,321 0.2% 14 May, 2026
21 Kathleen Kool Director 34,323 0 34,323 0.2% 14 May, 2026
22 Cari Robinson Director 22,616 0 22,616 0.1% 14 May, 2026

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

3,009 Insider Transactions

Source SEC Form 4
Latest quarter Sep 2026
Download Data
Date Insider Position Transaction Shares Price Value Shares Held After Ownership
23 Jun, 2026 William P Noglows Director Acquired M 14,799 $4.75 $70.30K 114,156 Direct
23 Jun, 2026 William P Noglows Director Disposed M 14,799 $0.00 $0 0 Direct
13 May, 2026 Cari Robinson Director Acquired A 10,370 $0.00 $0 22,616 Direct
13 May, 2026 Kathleen Kool Director Acquired A 10,370 $0.00 $0 34,323 Direct
13 May, 2026 James E Sweetnam Director Acquired A 10,370 $0.00 $0 36,321 Direct
13 May, 2026 William P Noglows Director Acquired A 10,370 $0.00 $0 99,357 Direct
13 May, 2026 Steven R Mitchell Director Acquired A 10,370 $0.00 $0 156,898 Direct
13 May, 2026 Steven R Mitchell Director Acquired A 8,706 $0.00 $0 8,706 Direct
13 May, 2026 James E Sweetnam Director Acquired A 8,706 $0.00 $0 8,706 Direct
13 May, 2026 Cari Robinson Director Acquired A 8,706 $0.00 $0 8,706 Direct
13 May, 2026 Kathleen Kool Director Acquired A 8,706 $0.00 $0 8,706 Direct
13 May, 2026 William P Noglows Director Acquired A 8,706 $0.00 $0 8,706 Direct
08 Mar, 2026 Corby C Whitaker Chief Commercial Officer Disposed F 1,924 $3.22 $6.20K 205,315 Direct
08 Mar, 2026 Gregg Landes Chief Operating Officer Disposed F 1,924 $3.22 $6.20K 102,931 Direct
08 Mar, 2026 Donald R Young President And Ceo Disposed F 4,275 $3.22 $13.77K 637,834 Direct
08 Mar, 2026 Gregg Landes Chief Operating Officer Disposed F 1,924 $3.22 $6.20K 102,931 Direct
08 Mar, 2026 Corby C Whitaker Chief Commercial Officer Disposed F 1,924 $3.22 $6.20K 205,315 Direct
08 Mar, 2026 Gregg Landes Chief Operating Officer Disposed F 1,924 $3.22 $6.20K 102,931 Direct
08 Mar, 2026 Grant Douglas Thoele Cfo Treasurer Disposed F 590 $3.22 $1.90K 77,732 Direct
08 Mar, 2026 Grant Douglas Thoele Cfo Treasurer Disposed F 590 $3.22 $1.90K 77,732 Direct