$SRPX  is listed on OTC Pink Current of the OTC Tier   on the OTC Markets. 

Companies that follow the International Reporting Standard or the Alternative Reporting Standard by making filings publicly available through the OTC Disclosure & News Service pursuant to OTC Markets Group's Guidelines for Providing Adequate Current Information (pdf) are designated as OTC Pink Current Information®. 

The Current Information category is based on the level of disclosure and is not a designation of quality or investment risk. This category includes shell or development stage companies with little or no operations as well as companies without audited financials and as such should be considered extremely speculative by investors.