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Form SCHEDULE 13G/A Ryerson Holding Corp Filed by: PLATINUM EQUITY, LLC

August 14, 2026 4:40 PM





Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Rule 13d-1(b)
Rule 13d-1(c)
Rule 13d-1(d)




schemaVersion:


SCHEDULE 13G





SCHEDULE 13G





SCHEDULE 13G





SCHEDULE 13G





SCHEDULE 13G





SCHEDULE 13G





SCHEDULE 13G





SCHEDULE 13G





SCHEDULE 13G



Platinum Equity, LLC
Signature:/s/ Mary Ann Sigler
Name/Title:Mary Ann Sigler / Executive Vice President, Chief Financial Officer and Treasurer
Date:08/14/2026
Platinum Equity Investment Holdings, LLC
Signature:/s/ Mary Ann Sigler
Name/Title:Mary Ann Sigler / Vice President, Secretary and Treasurer
Date:08/14/2026
Platinum Equity Investment Holdings IC (Cayman), LLC
Signature:/s/ Mary Ann Sigler
Name/Title:Mary Ann Sigler / President
Date:08/14/2026
Platinum Equity InvestCo, L.P.
Signature:By: Platinum Equity Investment Holdings IC (Cayman), LLC, its general partner, By: /s/ Mary Ann Sigler
Name/Title:Mary Ann Sigler / President
Date:08/14/2026
Platinum Equity Investment Holdings II, LLC
Signature:/s/ Mary Ann Sigler
Name/Title:Mary Ann Sigler / Secretary
Date:08/14/2026
Platinum Equity Partners II, LLC
Signature:/s/ Mary Ann Sigler
Name/Title:Mary Ann Sigler / Secretary
Date:08/14/2026
RYPS, LLC
Signature:/s/ Mary Ann Sigler
Name/Title:Mary Ann Sigler / Vice President
Date:08/14/2026
Tom Gores
Signature:/s/ Mary Ann Sigler
Name/Title:Mary Ann Sigler / Attorney-in-Fact
Date:08/14/2026
Exhibit Information

Exhibit No. 24 Power of Attorney (previously filed). Exhibit No. 99 Joint Filing Agreement (previously filed).

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