Kiessling Heather (CIK 2026548) reported 5 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-07-02). Recent activity: Sell ASPI (23,124 shares), Buy ASPI (840,000 shares), Sell ASPI (23,124 shares), Sell ASPI (80,000 shares), Buy ASPI (400,000 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-07-02 | ASP Isotopes Inc. (ASPI) | Chief Financial Officer | Sell | 23,124 | $145,219 |
| 2026-06-03 | ASP Isotopes Inc. (ASPI) | Chief Financial Officer | Buy | 840,000 | $0 |
| 2026-04-17 | ASP Isotopes Inc. (ASPI) | Chief Financial Officer | Sell | 23,124 | $126,673 |
| 2025-12-29 | ASP Isotopes Inc. (ASPI) | Chief Financial Officer | Sell | 80,000 | $464,000 |
| 2025-04-15 | ASP Isotopes Inc. (ASPI) | Chief Financial Officer | Buy | 400,000 | $0 |
Source: SEC Form 4 filings · as of 2026-07-02