ASPI
ASP ISOTOPES (ASPI)
NASDAQ
$3.35+$0.04 (+1.27%)
Price as of Sep 11, 2026 8:00 PM EDT
  • $507.5M
    Market Cap
  • -62.26%
    1-Year Change
  • Specialty Chemicals
    Industry

Top Holders

Institutional
Mutual Funds
Holder
Ownership %
Shares Held
Change (Shares, %)
Report Date
BLACKROCK, INC.
7.32%
9.2M
+889,054 (+9.65%)
Jun 30, 2026
ENCOMPASS CAPITAL ADVISORS LLC
5.21%
6.6M
-350,300 (-5.34%)
Jun 30, 2026
VANGUARD GROUP INC
5.09%
6.4M
+1.9M (+29.49%)
Dec 31, 2025
VANGUARD CAPITAL MANAGEMENT LLC
3.96%
5.0M
-77,511 (-1.56%)
Jun 30, 2026
ROVIDA INVESTMENT MANAGEMENT LTD
3.26%
4.1M
0 (0.00%)
Jun 30, 2026
BLACKROCK FUNDING, INC. /DE
3.14%
4.0M
+1.3M (+31.67%)
Dec 31, 2024
UBS GROUP AG
2.58%
3.2M
+405,924 (+12.50%)
Jun 30, 2026

Current Ownership Distribution

  • Institutions366.5M (72.63%)
  • Mutual Funds102.5M (20.30%)
  • Insiders35.7M (7.07%)
  • Other0 (0.00%)

Insider Transactions

  • 7.07% (35.7M)
    Current InsiderOwnership (%, shares)
  • 0
    Number of InsiderBuying (last 12 months)
  • $0.00
    Amount of InsiderBuying (last 12 months)
  • 4
    Number of InsiderSelling (last 12 months)
  • $159.3M
    Amount of InsiderSelling (last 12 months)
Insider Name & Title
Type
Date
Transaction Value
Shares
Share Price
Shares After Transactions
Ainscow Robert
COO
Sell
Sep 08, 2026
$36,215.90
8,438
$4.29
2.2M
Mann Paul Elliot
Chairman and CEO
Sell
Sep 04, 2026
$343,411.90
83,759
$4.10
9.3M
Mann Paul Elliot
Chairman and CEO
Sell
Sep 03, 2026
$328,331.36
83,758
$3.92
9.4M
Ainscow Robert
COO
Sell
Sep 02, 2026
$97,625.00
25,000
$3.90
2.3M
Mann Paul Elliot
Chairman and CEO
Sell
Sep 02, 2026
$327,493.78
83,758
$3.91
9.5M
Kiessling Heather
Chief Financial Officer
Sell
Jul 01, 2026
$145,218.72
23,124
$6.28
1.5M
Ainscow Donald George
EVP, Gen Counsel, Secretary
Sell
Jun 30, 2026
$614,000.00
100,000
$6.14
800,000
Ainscow Robert
COO
Sell
Jun 08, 2026
$59,057.56
8,438
$7.00
2.3M