Anastasios Tsonis is listed as an executive officer on 2 SEC Form D filings by 1 issuer between Dec 2011 and Jan 2012: RESPONSE BIOMEDICAL CORP (Vancouver, British Columbia, Canada (as filed: A1) — other health care — 2011–2012; $7.72M reported sold to 12 investors).
What this means One deal on file with the SEC. A Form D is the notice a company files after it starts selling a private investment — it is a notice, not an approval.
Public records searched: federal courts (CourtListener / RECAP), state securities regulators (AZ, CA, DE, TX, WA) — none found. Not yet searched: SEC enforcement releases.
What this means Nothing turned up where we looked (2 sources). That does not prove there is nothing — it means none was found in those sources on that date.