Yesterday, the SEC proposed amendments to Rule 144 and Form 144, and the filing requirements for Forms 4, 5, and 144. Notably, the proposed Form 144 filing requirements would mandate electronic filing of Form 144, eliminate the Form 144 filing requirement for sales of securities issued by companies that are not subject to Exchange Act reporting, and amend the Form 144 filing deadline to allow concurrent filing with Form 4. The substantive rule change addresses the holding period determination for securities acquired upon conversion or exchange of "market-adjustable securities." Comments on the proposal are due 60 days after publication in the Federal Register.
See the SEC's release & Fact Sheet; this statement from SEC Commissioner Roisman; and these summaries from Davis Polk and Cooley.