It seems you missed that the SEC has filed a complaint against - VIRTU AMERICAS LLC (f/k/a KCG Americas LLC).
From September 30, 2019:
"The Securities and Exchange Commission (“Commission”) deems it appropriate and in the public interest that public administrative and cease-and-desist proceedings be, and hereby are, instituted pursuant to Sections 15(b) and 21C of the Securities Exchange Act of 1934 (“Exchange Act”) against Virtu Americas LLC (f/k/a KCG Americas LLC) (“VAL” or “Respondent”)."