Kiessling Heather
SEC insider (Form 3/4/5 filer). CIK 0002026548. Chief Financial Officer at ASP Isotopes Inc. (ASPI). 6 reported Form 4/5 transactions since Sep 2024; latest on Oct 16, 2026. Located in DALLAS, TX.
Companies Kiessling Heather has filed insider reports for
- ASP Isotopes Inc. (ASPI): Officer, Chief Financial Officer
Kiessling Heather
CIK: 0002026548
Transaction Breakdown
Open Market Buys (P)0 (0.0%)
High conviction signal
Open Market Sales (S)4 (66.7%)
Position reduction
Option Exercises (M)0 (0.0%)
Derivative conversions
Awards (A)2 (33.3%)
Compensation grants
Other (G, F, J, C, D, …)0 (0.0%)
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Companies & Roles (1)
ASPI
ASP Isotopes Inc.
Officer
Discretionary Trading P&L
Holdings
Transaction History (6 total)
- Oct 16, 2026ASPI
ASP Isotopes Inc.
SaleDirect21.8K shares at avg. $2.19$48K - Jul 1, 2026ASPI
ASP Isotopes Inc.
SaleDirect23.1K shares at avg. $6.28$145K - May 28, 2026ASPI
ASP Isotopes Inc.
AwardDirect840K shares- - Apr 15, 2026ASPI
ASP Isotopes Inc.
SaleDirect23.1K shares at avg. $5.48$127K - Dec 18, 2025ASPI
ASP Isotopes Inc.
SaleDirect80K shares at avg. $5.80$464K - Apr 14, 2025ASPI
ASP Isotopes Inc.
AwardDirect400K shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Oct 16, 2026 | ASPI ASP Isotopes Inc. | Sale | 21,830 | $2.19 | $47,808 | Direct |
| Jul 1, 2026 | ASPI ASP Isotopes Inc. | Sale | 23,124 | $6.28 | $145,219 | Direct |
| May 28, 2026 | ASPI ASP Isotopes Inc. | Award | 840,000 | - | $0 | Direct |
| Apr 15, 2026 | ASPI ASP Isotopes Inc. | Sale | 23,124 | $5.48 | $126,673 | Direct |
| Dec 18, 2025 | ASPI ASP Isotopes Inc. | Sale | 80,000 | $5.80 | $463,840 | Direct |
| Apr 14, 2025 | ASPI ASP Isotopes Inc. | Award | 400,000 | - | - | Direct |
1-6 of 6 transactions