In the last 12 months, insiders at ASP Isotopes Inc. ($ASPI) filed 100 transactions with the SEC: 25 open-market purchases totaling $1,048,741 and 24 sales totaling $14,583,132. Net insider sentiment: net selling.
ASP Isotopes Inc. operates in the Miscellaneous chemical products industry (Industrial Applications and Services sector).
Most Active Insiders
- Mann Paul Elliot (Chief Executive Officer) — 16 transactions totaling $11,561,915
- Ainscow Robert (Chief Operating Officer) — 16 transactions totaling $1,856,276
- Mann Paul Elliot (Executive Chairman) — 2 transactions totaling $1,814,330
- Mann Paul Elliot (Executive Officer) — 2 transactions totaling $1,132,988
- Wider Todd (Not found) — 10 transactions totaling $1,123,866
View all SEC Filings for ASP Isotopes Inc. (ASPI).
Set Up your own filters →Recent Insider Transactions
| Transaction Date | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|
| March 6, 2026 | Ainscow Robert | COO | S | Common Stock | 8438 | $5.44 | 1,537,817.0000 | 110,840,122 | 0.55% | 0.01% |
| March 2, 2026 | Mann Paul Elliot | Executive Chairman | S | Common Stock | 162153 | $5.44 | 7,597,385.0000 | 110,840,122 | 2.18% | 0.15% |
| Dec. 18, 2025 | Kiessling Heather | Chief Financial Officer | S | Common Stock | 80000 | $5.80 | 732,500.0000 | 110,840,122 | 9.85% | 0.07% |
| Dec. 18, 2025 | Wider Todd | Not found | A | Common Stock | 36548 | $0.00 | 772,247.0000 | 110,840,122 | 4.97% | 0.03% |
| Dec. 18, 2025 | Gorley Michael | Not found | A | Common Stock | 36548 | $0.00 | 117,908.0000 | 110,840,122 | 44.92% | 0.03% |
| Dec. 18, 2025 | Hunter Ralph L. JR | Not found | A | Common Stock | 36548 | $0.00 | 47,018.0000 | 110,840,122 | 349.07% | 0.03% |
| Dec. 18, 2025 | Ryan Robert John Andrew | Not found | A | Common Stock | 36548 | $0.00 | 652,222.0000 | 110,840,122 | 5.94% | 0.03% |
| Dec. 8, 2025 | Ainscow Robert | Interim CEO and COO | S | Common Stock | 8438 | $6.20 | 1,546,255.0000 | 110,840,122 | 0.54% | 0.01% |
| Dec. 1, 2025 | Mann Paul Elliot | Executive Chairman | S | Common Stock | 162153 | $5.75 | 7,759,538.0000 | 110,840,122 | 2.05% | 0.15% |
| Sept. 6, 2025 | Hunter Ralph L. JR | Not found | A | Common Stock | 10470 | $0.00 | 10,470.0000 | 72,068,059 | 9999.99% | 0.01% |
| Nov. 25, 2025 | Mann Paul Elliot | Executive Officer | S | Common Stock | 50000 | $5.77 | 7,921,691.0000 | 110,840,122 | 0.63% | 0.05% |
| Nov. 17, 2025 | Mann Paul Elliot | Executive Officer | S | Common Stock | 112500 | $7.51 | 7,971,691.0000 | 72,068,059 | 1.39% | 0.16% |
| Nov. 25, 2025 | Ainscow Robert | Interim CEO and COO | S | Common Stock | 25000 | $5.77 | 1,554,693.0000 | 110,840,122 | 1.58% | 0.02% |
| Aug. 1, 2025 | Ainscow Donald George | EVP, Gen Counsel, Secretary | A | Common Stock | 400000 | $0.00 | 500,000.0000 | 72,068,059 | 400.00% | 0.56% |
| Nov. 17, 2025 | Ainscow Robert | Interim CEO and COO | S | Common Stock | 67500 | $7.51 | 1,579,693.0000 | 72,068,059 | 4.10% | 0.09% |
| Nov. 12, 2025 | Wider Todd | Not found | A | Common Stock | 25469 | $0.00 | 735,699.0000 | 72,068,059 | 3.59% | 0.04% |
| Oct. 14, 2025 | Ainscow Robert | Interim CEO and COO | S | Common Stock | 22500 | $13.60 | 1,647,193.0000 | 72,068,059 | 1.35% | 0.03% |
| Sept. 14, 2025 | Wider Todd | Not found | F | Common Stock | 21892 | $8.77 | 784,338.0000 | 72,068,059 | 2.72% | 0.03% |
| Sept. 14, 2025 | Wider Todd | Not found | M | Common Stock | 96000 | $2.00 | 806,230.0000 | 72,068,059 | 13.52% | 0.13% |
| Sept. 14, 2025 | Wider Todd | Not found | M | Stock Option (right to buy) | 96000 | $0.00 | 0.0000 | 72,068,059 | 100.00% | 0.13% |
| Sept. 15, 2025 | Wider Todd | Not found | S | Common Stock | 74108 | $8.76 | 710,230.0000 | 72,068,059 | 9.45% | 0.10% |
| Sept. 30, 2025 | Gorley Michael | Not found | S | Common Stock | 64000 | $9.75 | 81,360.0000 | 72,068,059 | 44.03% | 0.09% |
| Sept. 9, 2025 | Mann Paul Elliot | Chief Executive Officer | M | Employee Stock Option (right to buy) | 1000000 | $0.00 | 0.0000 | 72,068,059 | 100.00% | 1.39% |
| Sept. 8, 2025 | Ainscow Robert | Chief Operating Officer | S | Common Stock | 8438 | $8.53 | 1,411,554.0000 | 72,068,059 | 0.59% | 0.01% |
| Sept. 9, 2025 | Ainscow Robert | Chief Operating Officer | M | Common Stock | 150000 | $0.25 | 1,564,554.0000 | 72,068,059 | 10.60% | 0.21% |
| Sept. 9, 2025 | Ainscow Robert | Chief Operating Officer | F | Common Stock | 4396 | $8.53 | 1,557,158.0000 | 72,068,059 | 0.28% | 0.01% |
| Sept. 9, 2025 | Ainscow Robert | Chief Operating Officer | M | Common Stock | 12000 | $2.00 | 1,569,158.0000 | 72,068,059 | 0.77% | 0.02% |
| Sept. 9, 2025 | Ainscow Robert | Chief Operating Officer | F | Common Stock | 2813 | $8.53 | 1,566,345.0000 | 72,068,059 | 0.18% | 0.00% |
| Sept. 9, 2025 | Ainscow Robert | Chief Operating Officer | M | Common Stock | 135000 | $2.00 | 1,701,345.0000 | 72,068,059 | 8.62% | 0.19% |
| Sept. 9, 2025 | Ainscow Robert | Chief Operating Officer | F | Common Stock | 31652 | $8.53 | 1,669,693.0000 | 72,068,059 | 1.86% | 0.04% |
| Sept. 9, 2025 | Ainscow Robert | Chief Operating Officer | M | Employee Stock Option (right to buy) | 150000 | $0.00 | 0.0000 | 72,068,059 | 100.00% | 0.21% |
| Sept. 9, 2025 | Ainscow Robert | Chief Operating Officer | M | Employee Stock Option (right to buy) | 12000 | $0.00 | 0.0000 | 72,068,059 | 100.00% | 0.02% |
| Sept. 9, 2025 | Ainscow Robert | Chief Operating Officer | M | Employee Stock Option (right to buy) | 135000 | $0.00 | 0.0000 | 72,068,059 | 100.00% | 0.19% |
| Sept. 8, 2025 | Mann Paul Elliot | Chief Executive Officer | S | Common Stock | 81076 | $8.53 | 7,234,378.0000 | 72,068,059 | 1.11% | 0.11% |
| Sept. 9, 2025 | Mann Paul Elliot | Chief Executive Officer | M | Common Stock | 216000 | $2.00 | 7,450,378.0000 | 72,068,059 | 2.99% | 0.30% |
| Sept. 9, 2025 | Mann Paul Elliot | Chief Executive Officer | F | Common Stock | 50644 | $8.53 | 7,399,734.0000 | 72,068,059 | 0.68% | 0.07% |
| Sept. 9, 2025 | Mann Paul Elliot | Chief Executive Officer | M | Common Stock | 1000000 | $2.00 | 8,399,734.0000 | 72,068,059 | 13.51% | 1.39% |
| Sept. 9, 2025 | Mann Paul Elliot | Chief Executive Officer | F | Common Stock | 234466 | $8.53 | 8,165,268.0000 | 72,068,059 | 2.79% | 0.33% |
| Sept. 9, 2025 | Mann Paul Elliot | Chief Executive Officer | S | Common Stock | 81077 | $8.39 | 8,084,191.0000 | 72,068,059 | 0.99% | 0.11% |
| Sept. 9, 2025 | Mann Paul Elliot | Chief Executive Officer | M | Employee Stock Option (right to buy) | 216000 | $0.00 | 0.0000 | 72,068,059 | 100.00% | 0.30% |
| Aug. 29, 2025 | Moore Duncan | Not found | S | Common Stock | 75000 | $9.28 | 994,553.0000 | 72,068,059 | 7.01% | 0.10% |
| April 15, 2025 | Ainscow Robert | Chief Operating Officer | S | Common Stock | 66666 | $5.75 | 1,553,326.0000 | 72,068,059 | 4.12% | 0.09% |
| April 17, 2025 | Mann Paul Elliot | Chief Executive Officer | S | Common Stock | 316666 | $5.62 | 7,315,454.0000 | 72,068,059 | 4.15% | 0.44% |
| April 17, 2025 | Ainscow Robert | Chief Operating Officer | S | Common Stock | 66668 | $5.62 | 1,419,992.0000 | 72,068,059 | 4.48% | 0.09% |
| April 15, 2025 | Mann Paul Elliot | Chief Executive Officer | S | Common Stock | 316667 | $5.75 | 7,948,787.0000 | 72,068,059 | 3.83% | 0.44% |
| April 16, 2025 | Mann Paul Elliot | Chief Executive Officer | S | Common Stock | 316667 | $5.45 | 7,632,120.0000 | 72,068,059 | 3.98% | 0.44% |
| April 16, 2025 | Ainscow Robert | Chief Operating Officer | S | Common Stock | 66666 | $5.45 | 1,486,660.0000 | 72,068,059 | 4.29% | 0.09% |
| April 14, 2025 | Mann Paul Elliot | Chief Executive Officer | A | Common Stock | 1441361 | $0.00 | 8,265,454.0000 | 72,068,059 | 21.12% | 2.00% |
| April 14, 2025 | Kiessling Heather | Chief Financial Officer | A | Common Stock | 400000 | $0.00 | 812,500.0000 | 72,068,059 | 96.97% | 0.56% |
| April 14, 2025 | Ainscow Robert | Chief Operating Officer | A | Common Stock | 400000 | $0.00 | 1,619,992.0000 | 72,068,059 | 32.79% | 0.56% |
| May 30, 2024 | Ryan Robert John Andrew | Not found | L | Common Stock | 1050 | $5.40 | 615,674.0000 | 0 | 0.17% | 0.00% |
| Nov. 29, 2024 | Gorley Michael | Not found | L | Common Stock | 1000 | $5.05 | 145,360.0000 | 0 | 0.69% | 0.00% |
| Dec. 9, 2024 | Moore Duncan | Not found | A | Common Stock | 77626 | $0.00 | 974,315.0000 | 0 | 8.66% | 0.00% |
| Dec. 9, 2024 | Moore Duncan | Not found | A | Common Stock | 95238 | $0.00 | 1,069,553.0000 | 0 | 9.77% | 0.00% |
| Nov. 20, 2024 | Ryan Robert John Andrew | Not found | A | Common Stock | 42522 | $0.00 | 614,624.0000 | 0 | 7.43% | 0.00% |
| Nov. 20, 2024 | Wider Todd | Not found | A | Common Stock | 42522 | $0.00 | 710,230.0000 | 0 | 6.37% | 0.00% |
| Nov. 20, 2024 | Gorley Michael | Not found | A | Common Stock | 42522 | $0.00 | 144,360.0000 | 0 | 41.75% | 0.00% |
| Nov. 20, 2024 | Moore Duncan | Not found | A | Common Stock | 42522 | $0.00 | 896,689.0000 | 0 | 4.98% | 0.00% |
| Oct. 11, 2024 | AK Jensen Investment Management Ltd | TenPercentOwner | A | Common Stock, par value $0.01 per share | 30000 | $3.03 | 6,746,874.0000 | 0 | 0.45% | 0.00% |
| Sept. 6, 2024 | Ainscow Robert | Chief Operating Officer | A | Common Stock | 300000 | $0.00 | 1,219,992.0000 | 0 | 32.61% | 0.00% |
| Sept. 6, 2024 | Mann Paul Elliot | Chief Executive Officer | A | Common Stock | 978466 | $0.00 | 6,824,093.0000 | 0 | 16.74% | 0.00% |
| Aug. 13, 2024 | Gorley Michael | Not found | A | Common Stock | 8380 | $0.00 | 101,838.0000 | 0 | 8.97% | 0.00% |
| Aug. 13, 2024 | Wider Todd | Not found | A | Common Stock | 77626 | $0.00 | 572,470.0000 | 0 | 15.69% | 0.00% |
| Aug. 13, 2024 | Wider Todd | Not found | A | Common Stock | 95238 | $0.00 | 667,708.0000 | 0 | 16.64% | 0.00% |
| Aug. 2, 2024 | AK Jensen Investment Management Ltd | TenPercentOwner | S | Common Stock | 80000 | $2.23 | 6,566,874.0000 | 0 | 1.20% | 0.00% |
| Aug. 1, 2024 | AK Jensen Investment Management Ltd | TenPercentOwner | S | Common Stock, par value $0.01 per share ("Common Stock") | 31849 | $2.45 | 6,646,874.0000 | 0 | 0.48% | 0.00% |
| July 15, 2024 | Mann Paul Elliot | Chief Executive Officer | P | Common Stock | 39984 | $0.00 | 5,845,627.0000 | 0 | 0.69% | 0.00% |
| July 15, 2024 | Ainscow Robert | Chief Operating Officer | P | Common Stock | 19992 | $0.00 | 919,992.0000 | 0 | 2.22% | 0.00% |
| July 10, 2024 | AK Jensen Investment Management Ltd | TenPercentOwner | P | Common Stock | 61849 | $3.40 | 6,678,723.0000 | 0 | 0.93% | 0.00% |
| July 9, 2024 | AK Jensen Investment Management Ltd | TenPercentOwner | P | Common Stock | 30000 | $3.05 | 6,616,874.0000 | 0 | 0.46% | 0.00% |
| July 8, 2024 | AK Jensen Investment Management Ltd | TenPercentOwner | P | Common Stock, par value $0.01 per share ("Common Stock") | 70000 | $3.05 | 6,586,874.0000 | 0 | 1.07% | 0.00% |
| July 1, 2024 | Kiessling Heather | Chief Financial Officer | A | Common Stock | 400000 | $0.00 | 412,500.0000 | 0 | 3200.00% | 0.00% |
| April 30, 2024 | Ryan Robert John Andrew | Not found | P | Common Stock | 3734 | $3.72 | 559,602.0000 | 0 | 0.67% | 0.00% |
| April 29, 2024 | Ryan Robert John Andrew | Not found | P | Common Stock | 4313 | $3.20 | 555,868.0000 | 0 | 0.78% | 0.00% |
| April 30, 2024 | Ryan Robert John Andrew | Not found | P | Common Stock | 5000 | $3.36 | 564,602.0000 | 0 | 0.89% | 0.00% |
| April 30, 2024 | Ryan Robert John Andrew | Not found | P | Common Stock | 7500 | $3.34 | 572,102.0000 | 0 | 1.33% | 0.00% |
| April 26, 2024 | Ryan Robert John Andrew | Not found | P | Common Stock | 5000 | $3.48 | 551,555.0000 | 0 | 0.91% | 0.00% |
| April 25, 2024 | Ryan Robert John Andrew | Not found | P | Common Stock | 2500 | $3.46 | 544,555.0000 | 0 | 0.46% | 0.00% |
| April 25, 2024 | Ryan Robert John Andrew | Not found | P | Common Stock | 5000 | $3.40 | 542,055.0000 | 0 | 0.93% | 0.00% |
| April 25, 2024 | Ryan Robert John Andrew | Not found | P | Common Stock | 2000 | $3.40 | 546,555.0000 | 0 | 0.37% | 0.00% |
| Oct. 23, 2023 | Gorley Michael | Director | A | Common Stock | 93458 | $0.00 | 93,458.0000 | 0 | 9999.99% | 0.00% |
| Jan. 29, 2024 | Ryan Robert John Andrew | Director | P | Common Stock | 15596 | $2.35 | 537,055.0000 | 0 | 2.99% | 0.00% |
| Jan. 25, 2024 | Ryan Robert John Andrew | Director | P | Common Stock | 100 | $2.54 | 521,459.0000 | 0 | 0.02% | 0.00% |
| Jan. 17, 2024 | Ryan Robert John Andrew | Director | P | Common Stock | 100 | $1.91 | 521,359.0000 | 0 | 0.02% | 0.00% |
| Jan. 16, 2024 | Ryan Robert John Andrew | Director | P | Common Stock | 2550 | $1.92 | 521,259.0000 | 0 | 0.49% | 0.00% |
| Jan. 14, 2024 | Ryan Robert John Andrew | Director | A | Common Stock | 50251 | $0.00 | 518,709.0000 | 0 | 10.73% | 0.00% |
| Aug. 10, 2023 | Moore Duncan | Not found | A | Common Stock | 200000 | $0.00 | 750,000.0000 | 0 | 36.36% | 0.00% |
| Oct. 26, 2023 | Wider Todd | Not found | P | Common Stock | 94844 | $0.96 | 494,844.0000 | 0 | 23.71% | 0.00% |
| Oct. 26, 2023 | Donfeld Joshua Jay | Not found | P | Common Stock | 104167 | $0.96 | 1,104,167.0000 | 0 | 10.42% | 0.00% |
| Oct. 26, 2023 | Moore Duncan | Not found | P | Common Stock | 104167 | $0.96 | 854,167.0000 | 0 | 13.89% | 0.00% |
| June 29, 2023 | Moore Duncan | Not found | P | Common Stock | 50000 | $0.50 | 500,000.0000 | 0 | 11.11% | 0.00% |
| June 29, 2023 | Moore Duncan | Not found | P | Common Stock | 50000 | $0.50 | 550,000.0000 | 0 | 10.00% | 0.00% |
| May 18, 2023 | Moore Duncan | Not found | P | Common Stock | 20000 | $0.31 | 450,000.0000 | 0 | 4.65% | 0.00% |
| May 10, 2023 | Moore Duncan | Not found | P | Common Stock | 10000 | $0.50 | 430,000.0000 | 0 | 2.38% | 0.00% |
| April 6, 2023 | Moore Duncan | Not found | P | Common Stock | 20000 | $1.00 | 420,000.0000 | 0 | 5.00% | 0.00% |
| March 1, 2023 | Mann Paul Elliot | Chief Executive Officer | A | Common Stock | 718143 | $0.00 | 5,805,643.0000 | 0 | 14.12% | 0.00% |
| March 1, 2023 | Vasnetsov Sergey | Not found | A | Common Stock | 538607 | $0.00 | 3,838,607.0000 | 0 | 16.32% | 0.00% |
| Dec. 30, 2022 | Vasnetsov Sergey | Not found | A | Common Stock | 500000 | $0.00 | 3,300,000.0000 | 0 | 17.86% | 0.00% |
| Dec. 30, 2022 | Mann Paul Elliot | Chief Executive Officer | A | Common Stock | 1000000 | $0.00 | 5,087,500.0000 | 0 | 24.46% | 0.00% |
| Dec. 30, 2022 | Ainscow Robert | Chief Financial Officer | A | Common Stock | 50000 | $0.00 | 900,000.0000 | 0 | 5.88% | 0.00% |