Mark N. Tompkins

Mark N. Tompkins has filed trades across 8 companies (mainly through SEC (Form 4)), most often in Aeluma, Inc., Amesite Inc. and Deep Fission, Inc. The record holds 47 filings, for trades running from 29 April 2021 to 4 February 2026.

On the open market, the record shows 3 purchases worth €1.1M and 37 sales worth €8.5M. No amount is published for 3 filings, which the totals therefore leave out. Unlike grants, an open-market purchase is paid for by the insider, at the market price. Since January 2026: no purchases and 3 sales on the market.

Half of the purchases are above €419k and half below. Across 3 purchases, this insider has always bought alone, with no colleague buying within 30 days.

The latest filing, published on 5 February 2026, reports an open-market sale of €353k in Aeluma, Inc. The most recent open-market purchase was published on 13 January 2023, 1,374 days ago. Filings reach the SEC (Form 4) feed a median of 4 days after the trade. Section 16 rules allow two business days to file each Form 4. Keep in mind that insiders sell for many reasons unrelated to the outlook, from tax bills to estate planning. Every figure here comes from the filings published by SEC (Form 4) and describes the past, not future prices; it is not investment advice.