X0202 SCHEDULE 13D/A 0002158621-26-000002 0002158621 XXXXXXXX LIVE 1 PRIMECAP Odyssey Discovery ETF 10/30/2026 false 0001293967 74160Q400 PRIMECAP Odyssey Funds

177 EAST COLORADO BOULEVARD, 11TH FLOOR 177 EAST COLORADO BOULEVARD, 11TH FLOOR PASADENA CA 91105

Jennifer A. Ottosen (626) 304-9222 PRIMECAP Management Company 177 East Colorado Boulevard, 11th Floor Pasadena CA 91105 Sara P. Crovitz (212) 451-2300 Stradley Ronon Stevens Young, LLP 2000 K Street NW, Suite 700 Washington DC 20006 0002158621 N Mordecai Alfred Winborne PF N X1 50000.00 0.00 50000.00 0.00 50000.00 N 2.4 IN This Amendment No. 1 to Schedule 13D relates to the common shares ("Shares") of PRIMECAP Odyssey Discovery ETF ("POMG"), and amends the initial statement on Schedule 13D filed by the undersigned on October 26, 2026, as specifically set forth herein. This Amendment No. 1 is being filed to reflect a decrease in beneficial ownership of Shares by the Reporting Persons as a result of the 2,060,000 Shares of POMG outstanding on October 30, 2026. PRIMECAP Odyssey Discovery ETF PRIMECAP Odyssey Funds 177 EAST COLORADO BOULEVARD, 11TH FLOOR 177 EAST COLORADO BOULEVARD, 11TH FLOOR PASADENA CA 91105 The Reporting person owns 50,000 shares of POMG, which accounts for 2.42% of the total outstanding shares. Sole Voting Power: 50,000 shares Shared Voting Power: 0 Sole Dispositive Power: 50,000 shares Shared Dispositive Power: 0 N/A As of October 30, 2026, the Reporting Person ceased to be the beneficial owner of more than five percent of the class of securities. None None Mordecai Alfred Winborne /s/Alfred W. Mordecai 11/02/2026