FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * Schnaufer Erich S   2. Issuer Name and Ticker or Trading Symbol Ryerson Holding Corp [RYI] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Chief Financial Officer (Last) (First) (Middle) C/O RYERSON HOLDING CORPORATION, 227 W. MONROE ST., 27TH FLOOR 3. Date of Earliest Transaction (Month/Day/Year) 03/31/2018 (Street) CHICAGO, IL 60606 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) 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, (par value $0.01 per share) 03/31/2018   M   2,750 A $ 0 (1) 21,195 D   Common Stock, (par value $0.01 per share) 03/31/2018   M   2,750 A $ 0 (1) 23,945 D

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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 Underlying Securities (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 of Derivative Security: 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

Restricted Stock Units

(2)

03/31/2018

M

2,750

(3)

(3)

Common Stock

2,750

$ 0 (4)

2,750

D

Restricted Stock Units

(2)

03/31/2018

M

2,750

(5)

(5)

Common Stock

2,750

$ 0 (4)

5,500

D

Restricted Stock Units

(2)

03/31/2018

A

7,425

(6)

(6)

Common Stock

7,425

$ 0

7,425

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Schnaufer Erich S C/O RYERSON HOLDING CORPORATION 227 W. MONROE ST., 27TH FLOOR CHICAGO, IL 60606			Chief Financial Officer

Signatures

/s/ Camilla Rykke Merrick, attorney-in-fact		04/03/2018
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	Shares received upon the vesting of restricted stock units.
(2)	Each restricted stock unit represents a contingent right to receive one share of common stock of Ryerson Holding Corporation.
(3)	On March 31, 2016, the reporting person was granted 8,250 restricted stock units, of which 2,750 vested on March 31, 2017 and 2,750 vested on March 31, 2018. The remaining 2,750 unvested restricted stock units will vest on March 31, 2019. Vested shares will be delivered to the reporting person not later than 60 days following such vesting dates.
(4)	The restricted stock units reported as disposed herein were settled for shares of common stock of Ryerson Holding Corporation.
(5)	On March 31, 2017, the reporting person was granted 8,250 restricted stock units, of which 2,750 vested on March 31, 2018. Of the remaining unvested restricted stock units, 2,750 will vest on March 31, 2019 and 2,750 will vest on March 31, 2020. Vested shares will be delivered to the reporting person not later than 60 days following such vesting dates.
(6)	On March 31, 2018, the reporting person was granted 7,425 restricted stock units, of which 2,475 will vest on March 31, 2019, 2,475 will vest on March 31, 2020 and 2,475 will vest on March 31, 2021. Vested shares will be delivered to the reporting person not later than 60 days following such vesting dates.

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