ASPN
Aspen Aerogels (ASPN)
NYSE
$5.65-$0.35 (-5.76%)
Price as of Nov 13, 2026 12:43 PM EST
  • $497.9M
    Market Cap
  • 86.02%
    1-Year Change
  • Specialty Chemicals
    Industry

Top Holders

Institutional
Mutual Funds
Holder
Ownership %
Shares Held
Change (Shares, %)
Report Date
KIM, LLC
14.77%
12.3M
0 (0.00%)
Jun 30, 2026
AIGH CAPITAL MANAGEMENT LLC
8.60%
7.2M
+7.2M (+100.00%)
Sep 30, 2026
BLACKROCK, INC.
6.35%
5.3M
+534,072 (+10.12%)
Jun 30, 2026
OAKTOP CAPITAL MANAGEMENT II, L.P.
6.22%
5.2M
0 (0.00%)
Jun 30, 2026
BLACKROCK FUNDING, INC. /DE
6.02%
5.0M
+336,880 (+6.74%)
Dec 31, 2024
VANGUARD GROUP INC
5.64%
4.7M
+175,580 (+3.75%)
Dec 31, 2025
BLACKROCK INC.
5.40%
4.5M
+429,479 (+9.56%)
Jun 30, 2024

Current Ownership Distribution

  • Institutions1.2B (78.24%)
  • Mutual Funds310.4M (19.72%)
  • Insiders32.1M (2.04%)
  • Other0 (0.00%)

Insider Transactions

  • 2.04% (32.1M)
    Current InsiderOwnership (%, shares)
  • 0
    Number of InsiderBuying (last 12 months)
  • $0.00
    Amount of InsiderBuying (last 12 months)
  • 2
    Number of InsiderSelling (last 12 months)
  • $59.5M
    Amount of InsiderSelling (last 12 months)
Insider Name & Title
Type
Date
Transaction Value
Shares
Share Price
Shares After Transactions
Nieuwoudt Stacy Durbin
Award
Nov 04, 2026
$0.00
5,100
$0.00
5,100
Nieuwoudt Stacy Durbin
Award
Nov 04, 2026
$0.00
6,073
$0.00
6,073
DEEGAN GLENN E.
CAO, GC & Corp Secretary
In Kind
Sep 30, 2026
$6,263.64
1,143
$5.48
66,033
Wood River Capital, LLC
Sell
Sep 23, 2026
$58.1M
12.3M
$4.73
0
NOGLOWS WILLIAM P
Exempt
Jun 23, 2026
$0.00
14,799
$0.00
0
NOGLOWS WILLIAM P
Exempt
Jun 23, 2026
$70,295.25
14,799
$4.75
114,156
Landes Gregg
Chief Operating Officer
In Kind
Mar 08, 2026
$6,195.28
1,924
$3.22
102,931
Thoele Grant Douglas
CFO & Treasurer
In Kind
Mar 08, 2026
$1,899.80
590
$3.22
77,732
Whitaker Corby C
Chief Commercial Officer
In Kind
Mar 08, 2026
$6,195.28
1,924
$3.22
205,315
Young Donald R
President and CEO
In Kind
Mar 08, 2026
$13,765.50
4,275
$3.22
637,834
Young Donald R
President and CEO
In Kind
Mar 05, 2026
$28,180.86
8,618
$3.27
642,109
Daniel Santhosh P
Chief Accounting Officer
In Kind
Mar 05, 2026
$3,224.22
986
$3.27
15,330
Thoele Grant Douglas
CFO & Treasurer
In Kind
Mar 05, 2026
$7,743.36
2,368
$3.27
78,322
Landes Gregg
SVP, Operations and Strat Deve
In Kind
Mar 05, 2026
$12,471.78
3,814
$3.27
104,855
Whitaker Corby C
SVP, Sales and Marketing
In Kind
Mar 05, 2026
$12,775.89
3,907
$3.27
207,239
DEEGAN GLENN E.
CAO, GC & Corp Secretary
Award
Mar 04, 2026
$0.00
75,171
$0.00
75,171
Landes Gregg
SVP, Operations and Strat Deve
Award
Mar 04, 2026
$0.00
77,824
$0.00
77,824
Young Donald R
President and CEO
Award
Mar 04, 2026
$0.00
212,249
$0.00
212,249
Thoele Grant Douglas
CFO & Treasurer
Award
Mar 04, 2026
$0.00
74,893
$0.00
74,893
DEEGAN GLENN E.
CAO, GC & Corp Secretary
Award
Mar 04, 2026
$0.00
55,503
$0.00
67,176
Landes Gregg
SVP, Operations and Strat Deve
Award
Mar 04, 2026
$0.00
57,462
$0.00
108,669
Young Donald R
President and CEO
Award
Mar 04, 2026
$0.00
156,716
$0.00
650,727
Whitaker Corby C
SVP, Sales and Marketing
Award
Mar 04, 2026
$0.00
77,824
$0.00
77,824
Thoele Grant Douglas
CFO & Treasurer
Award
Mar 04, 2026
$0.00
55,298
$0.00
80,690
Whitaker Corby C
SVP, Sales and Marketing
Award
Mar 04, 2026
$0.00
57,462
$0.00
211,146
Young Donald R
President and CEO
Sell
Nov 13, 2025
$183,609.35
56,845
$3.23
494,011
Thoele Grant Douglas
CFO & Treasurer
Award
Oct 01, 2025
$0.00
14,563
$0.00
14,563
Thoele Grant Douglas
CFO & Treasurer
Award
Oct 01, 2025
$0.00
20,547
$0.00
20,547
Thoele Grant Douglas
CFO & Treasurer
Award
Oct 01, 2025
$0.00
10,273
$0.00
14,881
DEEGAN GLENN E.
CAO, GC & Corp Secretary
Award
Sep 30, 2025
$0.00
16,416
$0.00
16,416