Tompkins Mark N. (CIK 0001455971)

Latest company ownership

Shares held
2,700,000
Last filed at
Nov 16, 2021
Confidence Score
50.0
2025Q4
Confidence Score History
2021Q4 2025Q4
Role: 10% Owner
Shares held
2,319,988
Last filed at
Oct 21, 2025
Confidence Score
3.1
2025Q4
Confidence Score History
2021Q2 2025Q4
Role: 10% Owner
Shares held
2,043,103
Last filed at
Jun 2, 2021
Confidence Score
50.0
2025Q4
Confidence Score History
2020Q3 2025Q4
Role: Other
Shares held
108,160
Last filed at
Sep 28, 2017
Confidence Score
50.0
2025Q4
Confidence Score History
2017Q2 2025Q4

Recent buy/sell transactions

Exec date Filing date Company Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Dec 18, 2025 Dec 22, 2025 Aeluma, Inc. 10% Owner Sell 17.5 -85,000 -3.92% $1.2M
Dec 9, 2025 Dec 11, 2025 Aeluma, Inc. 10% Owner Sell 20.0 -50,000 -2.25% $854.3K
Dec 4, 2025 Dec 9, 2025 Aeluma, Inc. 10% Owner Sell 17.5 -100,000 -4.31% $1.6M
Oct 17, 2025 Oct 21, 2025 Aeluma, Inc. 10% Owner Sell 17.5 -77,500 -3.23% $1.3M
Oct 15, 2025 Oct 17, 2025 Aeluma, Inc. 10% Owner Sell 17.5 -65,000 -2.64% $1.3M
Oct 10, 2025 Oct 14, 2025 Aeluma, Inc. 10% Owner Sell 17.5 -107,186 -4.17% $1.9M
Oct 7, 2025 Oct 9, 2025 Aeluma, Inc. 10% Owner Sell 17.5 -106,908 -3.99% $1.8M
Oct 2, 2025 Oct 6, 2025 Aeluma, Inc. 10% Owner Sell 17.5 -129,751 -4.62% $2.3M
Sep 30, 2025 Oct 6, 2025 Aeluma, Inc. 10% Owner Sell 20.0 -33,800 -1.17% $546.9K
Sep 29, 2025 Oct 2, 2025 Aeluma, Inc. 10% Owner Sell 27.5 -109,080 -0.63% $1.8M
Dec 22, 2022 Jan 13, 2023 Aeluma, Inc. 10% Owner Buy 87.5 +83,333 3.17% $250K
Nov 12, 2021 Nov 16, 2021 Guerrilla RF, Inc. Other Sell 20.0 -250,000 -8.47% $500K
Jun 22, 2021 Jun 29, 2021 Aeluma, Inc. 10% Owner Buy 97.5 +357,500 15.71% $715K
May 28, 2021 Jun 2, 2021 Amesite Inc. 10% Owner Sell 22.5 -53,316 -2.54% $131.2K
May 25, 2021 May 27, 2021 Amesite Inc. 10% Owner Sell 22.5 -47,497 -2.22% $109.1K
May 20, 2021 May 24, 2021 Amesite Inc. 10% Owner Sell 22.5 -69,871 -3.16% $154.8K
May 17, 2021 May 19, 2021 Amesite Inc. 10% Owner Sell 22.5 -68,225 -1.50% $151.4K
May 12, 2021 May 14, 2021 Amesite Inc. 10% Owner Sell 22.5 -107,424 -4.50% $248.3K
May 7, 2021 May 11, 2021 Amesite Inc. 10% Owner Sell 22.5 -36,622 -1.51% $91.8K
May 4, 2021 May 6, 2021 Amesite Inc. 10% Owner Sell 22.5 -76,133 -3.04% $217.8K
Apr 29, 2021 May 3, 2021 Amesite Inc. 10% Owner Sell 22.5 -61,058 -100.00% $167.4K
Apr 26, 2021 Apr 28, 2021 Amesite Inc. 10% Owner Sell 22.5 -28,419 -1.10% $83.8K
Apr 15, 2021 Apr 20, 2021 Amesite Inc. 10% Owner Sell 22.5 -35,627 -1.36% $110.5K
Apr 12, 2021 Apr 14, 2021 Amesite Inc. 10% Owner Sell 22.5 -54,083 -2.02% $178.9K
Apr 8, 2021 Apr 9, 2021 Amesite Inc. 10% Owner Sell 22.5 -54,450 -1.99% $194.2K
Apr 5, 2021 Apr 7, 2021 Amesite Inc. 10% Owner Sell 20.0 -77,828 -2.77% $326.3K
Mar 30, 2021 Apr 1, 2021 Amesite Inc. 10% Owner Sell 20.0 -86,511 -2.98% $364.4K
Mar 4, 2021 Mar 5, 2021 Amesite Inc. 10% Owner Sell 32.5 -20,000 -0.68% $112.5K
Sep 29, 2020 Sep 29, 2020 Amesite Inc. 10% Owner Buy 72.5 +20,000 0.69% $100K
Sep 26, 2017 Sep 28, 2017 EXICURE, INC. Other Buy 92.5 +166,667 9.43% $500K
Jun 15, 2017 Jun 19, 2017 EXICURE, INC. Director Buy 90.0 +165,000 18.33% $875