Good question, here’s a link to the SEC pages about reverse mergers, which it appears is the case with Core Optics LLC and CRTG
“ .2 SEC reporting requirements before a reverse merger is completed When an acquisition will be effected through the exchange of equity interests, the legal acquirer/issuer will usually register the shares of its stock to be issued in the reverse merger using Form S-4. If the transaction requires the approval of one or more groups of shareholders, then the Form S-4 will oftentimes be combined with a proxy statement prepared pursuant to Regulation 14A.”