The SEC is adopting new Rule 13h-1 and Form 13H under Section 13(h) of the Securities Exchange Act of 1934 to assist the SEC in both identifying, and obtaining trading information on, market participants that conduct a substantial amount of trading activity, as measured by volume or market value, in the U.S. securities markets. Among other things, Rule 13h-1 will require a "large trader," defined as a person whose transactions in NMS securities equal or exceed 2 million shares or $20 million during any calendar day, or 20 million shares or $200 million during any calendar month, to identify itself to the SEC and make certain disclosures to the SEC on Form 13H. 76 FR 46960.