X0306 4 2022-05-13 0 0001481582 Ryerson Holding Corp RYI 0001228754 PLATINUM EQUITY, LLC 360 NORTH CRESCENT DRIVE BEVERLY HILLS CA 90210 0 0 1 0 0001271868 PLATINUM EQUITY CAPITAL PARTNERS LP C/O PLATINUM EQUITY ADVISORS, LLC 360 NORTH CRESCENT DRIVE BEVERLY HILLS CA 90210 0 0 1 0 0001634372 Platinum Equity Investment Holdings, LLC C/O PLATINUM EQUITY ADVISORS, LLC 360 NORTH CRESCENT DRIVE BEVERLY HILLS CA 90210 0 0 1 0 0001756330 Platinum Equity Investment Holdings IC (Cayman), LLC C/O PLATINUM EQUITY ADVISORS, LLC 360 NORTH CRESCENT DRIVE BEVERLY HILLS CA 90210 0 0 1 0 0001756331 Platinum Equity InvestCo, L.P. C/O PLATINUM EQUITY ADVISORS, LLC 360 NORTH CRESCENT DRIVE BEVERLY HILLS CA 90210 0 0 1 0 0001471784 Platinum Equity Investment Holdings II, LLC C/O PLATINUM EQUITY ADVISORS, LLC 360 NORTH CRESCENT DRIVE BEVERLY HILLS CA 90210 0 0 1 0 0001471786 Platinum Equity Partners II, LLC C/O PLATINUM EQUITY ADVISORS, LLC 360 NORTH CRESCENT DRIVE BEVERLY HILLS CA 90210 0 0 1 0 0001666670 RYPS, LLC C/O PLATINUM EQUITY ADVISORS, LLC 360 NORTH CRESCENT DRIVE BEVERLY HILLS CA 90210 0 0 1 0 0001471783 Gores Tom C/O PLATINUM EQUITY ADVISORS, LLC, 360 NORTH CRESCENT DRIVE BEVERLY HILLS CA 90210 0 0 1 0 Common Stock 2022-05-13 4 S 0 3500000 29.6441 D 17537500 I See footnote Common Stock 2022-05-13 4 S 0 1613022 29.56 D 15924478 I See footnote RYPS, LLC (the "Platinum Stockholder") is the record holder of the securities reported herein. Tom Gores is the manager of Platinum Equity, LLC, which is the sole member of Platinum Equity Investment Holdings, LLC, which is the sole member of Platinum Equity Investment Holdings IC (Cayman), LLC which is the general partner of Platinum Equity InvestCo, L.P., which is the sole member of Platinum Equity Investment Holdings II, LLC, which is the senior managing member of Platinum Equity Partners II, LLC, which is the general partner of members controlling a majority of the membership interest of the Platinum Stockholder. By virtue of these relationships, each of these entities and Mr. Gores may be deemed to share beneficial ownership of the securities held of record by the Platinum Stockholder. Platinum Equity, LLC, By: /s/ Barbara Velasco, Assistant Secretary 2022-05-17 Platinum Equity Capital Partners LP, By: Platinum Equity Partners, LLC, its general partner, By: /s/ Mary Ann Sigler, Secretary 2022-05-17 Platinum Equity Investment Holdings, LLC, By: /s/ Mary Ann Sigler, Secretary 2022-05-17 Platinum Equity Investment Holdings IC (Cayman), LLC, By: /s/ Mary Ann Sigler, President 2022-05-17 Platinum Equity InvestCo, L.P., By: Platinum Equity Investment Holdings IC (Cayman), LLC, its general partner, By: /s/ Mary Ann Sigler, President 2022-05-17 Platinum Equity Investment Holdings II, LLC, By: /s/ Mary Ann Sigler, Secretary 2022-05-17 Platinum Equity Partners II, LLC, By: /s/ Mary Ann Sigler, Secretary 2022-05-17 RYPS, LLC, By: /s/ Mary Ann Sigler, President 2022-05-17 Tom Gores, By: /s/ Mary Ann Sigler, Attorney-in-Fact 2022-05-17