Self-Regulatory Organizations; NYSE Arca, Inc.; Notice of Designation of a Longer Period for Commission Action on a Proposed Rule Change To Adopt NYSE Arca Rule 8.602-E To Permit the Listing and Trading of Actively Managed Solution Shares and To List and Trade Two Series of Actively Managed Solution Shares Issued by the American Century ETF Trust Under Proposed NYSE Arca Rule 8.602-E

On December 23, 2019, NYSE Arca, Inc. (“NYSE Arca” or “Exchange”) filed with the Securities and Exchange Commission (“Commission”), pursuant to Section 19(b)(1) of the Securities Exchange Act of 1934 (“Act”) and Rule 19b-4 thereunder, a proposed rule change to (1) adopt proposed NYSE Arca Rule 8.602-E to permit the Exchange to list and trade Actively Managed Solution Shares, which are shares of actively managed exchange-traded funds for which the portfolio is disclosed in accordance with standard mutual fund disclosure rules; and (2) list and trade the following Actively Managed Solution Shares under proposed NYSE Arca Rule 8.602-E: American Century Mid Cap Growth Impact ETF and American Century Sustainable Equity ETF. The proposed rule change was published for comment in the Federal Register on January 3, 2020. The Commission has received no comment letters on the proposed rule change.

Section 19(b)(2) of the Act provides that within 45 days of the publication of notice of the filing of a proposed rule change, or within such longer period up to 90 days as the Commission may designate if it finds such longer period to be appropriate and publishes its reasons for so finding, or as to which the self-regulatory organization consents, the Commission shall either approve the proposed rule change, disapprove the proposed rule change, or institute proceedings to determine whether the proposed rule change should be disapproved. The 45th day after publication of the notice for this proposed rule change is February 17, 2020. The Commission is extending this 45-day time period.

The Commission finds it appropriate to designate a longer period within which to take action on the proposed rule change so that it has sufficient time to consider the proposed rule change. Accordingly, the Commission, pursuant to Section 19(b)(2) of the Act, designates April 2, 2020 as the date by which the Commission shall either approve or disapprove, or institute proceedings to determine whether to disapprove, the proposed rule change (File No. SR-NYSEArca-2019-96).