SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* PLATINUM EQUITY, LLC (Last) (First) (Middle) C/O PLATINUM EQUITY ADVISORS, LLC 360 NORTH CRESCENT DRIVE (Street) BEVERLY HILLS CA 90210 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol Ryerson Holding Corp [ RYI ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director X 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 05/08/2023
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) Form filed by One Reporting Person X Form filed by More than One Reporting Person
	Rule 10b5-1(c) Transaction Indication Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	05/08/2023		S		2,630,700	D	$36.515	9,293,778	I	See footnote(1)
Common Stock	05/08/2023		S		1,369,300	D	$36.515	7,924,478	I	See footnote(1)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

1. Name and Address of Reporting Person* PLATINUM EQUITY, LLC (Last) (First) (Middle) C/O PLATINUM EQUITY ADVISORS, LLC 360 NORTH CRESCENT DRIVE (Street) BEVERLY HILLS CA 90210 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Platinum Equity Investment Holdings, LLC (Last) (First) (Middle) C/O PLATINUM EQUITY ADVISORS, LLC 360 NORTH CRESCENT DRIVE (Street) BEVERLY HILLS CA 90210 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Platinum Equity Investment Holdings IC (Cayman), LLC (Last) (First) (Middle) C/O PLATINUM EQUITY ADVISORS, LLC 360 NORTH CRESCENT DRIVE (Street) BEVERLY HILLS CA 90210 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Platinum Equity InvestCo, L.P. (Last) (First) (Middle) C/O PLATINUM EQUITY ADVISORS, LLC 360 NORTH CRESCENT DRIVE (Street) BEVERLY HILLS CA 90210 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Platinum Equity Investment Holdings II, LLC (Last) (First) (Middle) C/O PLATINUM EQUITY ADVISORS, LLC 360 NORTH CRESCENT DRIVE (Street) BEVERLY HILLS CA 90210 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Platinum Equity Partners II, LLC (Last) (First) (Middle) C/O PLATINUM EQUITY ADVISORS, LLC 360 NORTH CRESCENT DRIVE (Street) BEVERLY HILLS CA 90210 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* RYPS, LLC (Last) (First) (Middle) C/O PLATINUM EQUITY ADVISORS, LLC 360 NORTH CRESCENT DRIVE (Street) BEVERLY HILLS CA 90210 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Gores Tom (Last) (First) (Middle) C/O PLATINUM EQUITY ADVISORS, LLC 360 NORTH CRESCENT DRIVE (Street) BEVERLY HILLS CA 90210 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

Explanation of Responses:

1. 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/ Mary Ann Sigler, Executive Vice President, Chief Financial Officer and Treasurer	05/08/2023
	Platinum Equity Investment Holdings, LLC, By: /s/ Mary Ann Sigler, Secretary	05/08/2023
	Platinum Equity Investment Holdings IC (Cayman), LLC, By: /s/ Mary Ann Sigler, President	05/08/2023
	Platinum Equity InvestCo, L.P., By: Platinum Equity Investment Holdings IC (Cayman), LLC, its general partner, By: /s/ Mary Ann Sigler, President	05/08/2023
	Platinum Equity Investment Holdings II, LLC, By: /s/ Mary Ann Sigler, Secretary	05/08/2023
	Platinum Equity Partners II, LLC, By: /s/ Mary Ann Sigler, Secretary	05/08/2023
	RYPS, LLC, By: /s/ Mary Ann Sigler, President	05/08/2023
	Tom Gores, By: /s/ Mary Ann Sigler, Attorney-in-Fact	05/08/2023
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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