FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF 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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(Print or Type Responses)

1. Name and Address of Reporting Person *   HIGHBRIDGE CAPITAL MANAGEMENT LLC 2. Date of Event Requiring Statement (Month/Day/Year) 08/31/2017 3. Issuer Name and Ticker or Trading Symbol CASTLE A M & CO [NONE] (Last) (First) (Middle) 40 WEST 57TH ST., 32ND FLOOR 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) NEW YORK, NY 10019 6. Individual or Joint/Group Filing(Check Applicable Line) ___ Form filed by One Reporting Person _X_ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5) Common Stock, par value $0.01 per share ("Common Stock") 509,105 I See footnote (1)

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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
5.0% / 7.0% Convertible Sr Secured PIK Toggle Notes due 2022	  (2)	  (2)	Common Stock	13,177,915 (3)	$ (4)	I	See footnote (1)

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
HIGHBRIDGE CAPITAL MANAGEMENT LLC 40 WEST 57TH ST. 32ND FLOOR NEW YORK, NY 10019	Â	  X	Â	Â
1992 MSF International Ltd. C/O HEDGESERV (CAYMAN) LTD. WILLOW HOUSE, CRICKET SQUARE 3RD FLOOR , GEORGE TOWN, GRAND CAYMAN, E9 00000	Â	  X	Â	Â

Signatures

/s/ John Oliva, Managing Director, Highbridge Capital Management, LLC		09/11/2017
**Signature of Reporting Person		Date
1992 MSF International Ltd., By: Highbridge Capital Management, LLC, its Trading Manager, By: /s/ John Oliva, its Managing Director		09/11/2017
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(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)	The securities reported herein are held by (i) 1992 MSF International Ltd., a Cayman Islands exempted company ("MSF International") and (ii) 1992 Tactical Credit Master Fund, L.P., a Cayman Islands exempted limited partnership ("1992 Tactical" and together with MSF International, the "Funds"). Highbridge Capital Management, LLC ("HCM") serves as the trading manager of the Funds. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of such Reporting Person's pecuniary interest therein.
(2)	The Issuer's 5.00% / 7.00% Convertible Senior Secured PIK Toggle Notes due 2022 (the "Convertible Notes") are convertible at the election of the holder at any time prior to the close of business on the trading day immediately preceding August 31, 2022, the maturity date of the Convertible Notes.
(3)	Upon conversion of the Convertible Notes, the settlement of the conversion right may, at the option of the Issuer, be in the form of shares of Common Stock, cash or a combination of cash and shares of Common Stock.
(4)	The Convertible Notes are convertible into shares of Common Stock at an initial conversion rate of 0.2654 shares of Common Stock per $1.00 principal amount of Convertible Notes (subject to adjustment in certain circumstances in accordance with the terms of the Convertible Notes).

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