ASP Isotopes Inc. (ASPI) Insider Ownership

Historic Insider Ownership Trends

ASPI's three largest insider shareholders as of May 14, 2026 are Jensen Investment Management Ltd Ak (TenPercentOwner, 6.75Mn shares), Jensen Investment Management Ltd Ak (TenPercentOwner, 6.65Mn shares), Jensen Investment Management Ltd Ak (TenPercentOwner, 6.57Mn shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
Jensen Investment Management Ltd Ak - 0 6,746,874 16 Oct, 2024
Jensen Investment Management Ltd Ak - 0 6,646,874 05 Aug, 2024
Jensen Investment Management Ltd Ak - 0 6,566,874 05 Aug, 2024
Paul Elliot Mann Chief Executive Officer 5,087,500 0 17 Feb, 2023
Paul Elliot Mann Chief Executive Officer 5,087,500 0 17 Feb, 2023
Hendrik Strydom - 0 3,797,423 16 Nov, 2022
Hendrik Strydom - 0 3,797,423 16 Nov, 2022
Hendrik Strydom - 0 3,797,423 16 Nov, 2022
Sergey Vasnetsov - 0 2,800,000 16 Nov, 2022
Sergey Vasnetsov - 0 2,800,000 16 Nov, 2022
Sergey Vasnetsov - 0 2,800,000 16 Nov, 2022
Joshua Jay Donfeld - 1,000,000 0 16 Nov, 2022
Joshua Jay Donfeld - 1,000,000 0 16 Nov, 2022
Joshua Jay Donfeld - 1,000,000 0 16 Nov, 2022
Robert Ainscow Chief Financial Officer 900,000 0 17 Feb, 2023
Robert John Andrew Ryan - 537,055 0 26 Feb, 2024
Robert John Andrew Ryan - 537,055 0 26 Feb, 2024
Robert John Andrew Ryan - 537,055 0 26 Feb, 2024
Duncan Moore - 400,000 0 16 Nov, 2022
Duncan Moore - 400,000 0 16 Nov, 2022
Todd Wider - 400,000 0 16 Nov, 2022
Todd Wider - 400,000 0 16 Nov, 2022
Duncan Moore - 400,000 0 16 Nov, 2022
Todd Wider - 400,000 0 16 Nov, 2022

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
11 Oct, 2024 Jensen Investment Management Ltd Ak Common Stock, par value $0.01 per share A 30,000 $3.03 6,746,874 I A
01 Aug, 2024 Jensen Investment Management Ltd Ak Common Stock, par value $0.01 per share (Common Stock) D 31,849 $2.45 6,646,874 I S
02 Aug, 2024 Jensen Investment Management Ltd Ak Common Stock D 80,000 $2.23 6,566,874 I S
08 Jul, 2024 Jensen Investment Management Ltd Ak Common Stock, par value $0.01 per share (Common Stock) A 70,000 $3.05 6,586,874 I P
09 Jul, 2024 Jensen Investment Management Ltd Ak Common Stock A 30,000 $3.05 6,616,874 I P
10 Jul, 2024 Jensen Investment Management Ltd Ak Common Stock A 61,849 $3.40 6,678,723 I P
14 Jan, 2024 Robert John Andrew Ryan Common Stock A 50,251 - 518,709 D A
14 Jan, 2024 Robert John Andrew Ryan Common Stock A 50,251 - 518,709 D A
14 Jan, 2024 Robert John Andrew Ryan Common Stock A 50,251 - 518,709 D A
16 Jan, 2024 Robert John Andrew Ryan Common Stock A 2,550 $1.92 521,259 D P
16 Jan, 2024 Robert John Andrew Ryan Common Stock A 2,550 $1.92 521,259 D P
16 Jan, 2024 Robert John Andrew Ryan Common Stock A 2,550 $1.92 521,259 D P
17 Jan, 2024 Robert John Andrew Ryan Common Stock A 100 $1.91 521,359 D P
17 Jan, 2024 Robert John Andrew Ryan Common Stock A 100 $1.91 521,359 D P
17 Jan, 2024 Robert John Andrew Ryan Common Stock A 100 $1.91 521,359 D P
25 Jan, 2024 Robert John Andrew Ryan Common Stock A 100 $2.54 521,459 D P
25 Jan, 2024 Robert John Andrew Ryan Common Stock A 100 $2.54 521,459 D P
25 Jan, 2024 Robert John Andrew Ryan Common Stock A 100 $2.54 521,459 D P
29 Jan, 2024 Robert John Andrew Ryan Common Stock A 15,596 $2.35 537,055 D P
29 Jan, 2024 Robert John Andrew Ryan Common Stock A 15,596 $2.35 537,055 D P