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 * SGF, LLC   2. Issuer Name and Ticker or Trading Symbol CASTLE A M & CO [CASLQ] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 30 NORTH LASALLE STREET, SUITE 1232,  3. Date of Earliest Transaction (Month/Day/Year) 08/31/2017 (Street) CHICAGO, IL 60602 4. If Amendment, Date 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 (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 (1) 08/31/2017   J(7)   8,759,076 D $ 0 0 D   Common Stock (1) 08/31/2017   J(8)   107,850 A $ 0 107,850 D   Common Stock (2) 08/31/2017   J(7)   153,990 D $ 0 0 D   Common Stock (2) 08/31/2017   J(8)   1,231 A $ 0 1,231 D   Common Stock (3) 08/31/2017   J(7)   33,471 D $ 0 0 D   Common Stock (3) 08/31/2017   J(8)   412 A $ 0 412 D   Common Stock (4) 08/31/2017   J(7)   14,739 D $ 0 0 I See Footnote (9) Common Stock (4) 08/31/2017   J(8)   181 A $ 0 181 I See Footnote (9) Common Stock (5) 08/31/2017   J(7)   0 D $ 0 0 D   Common Stock (5) 08/31/2017   J(8)   0 A $ 0 0 D

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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

Exchange Notes (6)

$ 0.2654

08/31/2017

A

17,775,807

08/31/2017

08/31/2022

Common Stock

4,717,699

$ 0 (10)

17,775,807

D

New Money Notes (6)

$ 0.2654

08/31/2017

A

7,125,323

08/31/2017

08/31/2022

Common Stock

1,891,061

$ 5,700,258 (11)

7,125,323

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
SGF, LLC 30 NORTH LASALLE STREET, SUITE 1232 CHICAGO, IL 60602	X	X
WB & CO 30 NORTH LASALLE STREET SUITE 1232 CHICAGO, IL 60602	X	X
Mellin Jonathan 1420 KENSINGTON ROAD SUITE 220 OAK BROOK, IL 60523	X	X
Donnelley Reuben Simpson 1420 KENSINGTON ROAD SUITE 220 OAK BROOK, IL 60523	X	X
FOM Corp 30 NORTH LASALLE STREET SUITE 1232 CHICAGO, IL 60602	X	X

Signatures

SGF, LLC, By: /s/ Reuben S. Donnelley, Managing Member		09/05/2017
**Signature of Reporting Person		Date
WB & Co, By: /s/ Jonathan B. Mellin, General Partner		09/05/2017
**Signature of Reporting Person		Date
/s/ Jonathan B. Mellin		09/05/2017
**Signature of Reporting Person		Date
/s/ Reuben S. Donnelley		09/05/2017
**Signature of Reporting Person		Date
FOM Corp, By: /s/ Jonathan B. Mellin, President		09/05/2017
**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)	These shares are beneficially owned by WB&Co ("WBC"). The Reporting Person disclaims beneficial ownership of any shares of New Common Stock, except to the extent of any pecuniary interest such Reporting Person may have.
(2)	These shares are beneficially owned by Jonathan Mellin ("Mr. Mellin"). The Reporting Person disclaims beneficial ownership of any shares of New Common Stock, except to the extent of any pecuniary interest such Reporting Person may have.
(3)	These shares are beneficially owned by Reuben Donnelley ("Mr. Donnelley"). The Reporting Person disclaims beneficial ownership of any shares of New Common Stock, except to the extent of any pecuniary interest such Reporting Person may have.
(4)	Mr. Donnelley may be deemed to beneficially own these shares, which are held by an immediate family member who shares Mr. Donnelley's household. The Reporting Person disclaims beneficial ownership of any shares of New Common Stock, except to the extent of any pecuniary interest such Reporting Person may have.
(5)	FOM Corp. ("FOM") does not have beneficial ownership of any shares of Common Stock.
(6)	These securities are beneficially owned by SGF, LLC ("SGF"). The Reporting Person disclaims beneficial ownership of any shares of New Common Stock, except to the extent of any pecuniary interest such Reporting Person may have.
(7)	On August 31, 2017 (the "Effective Date"), A.M. Castle & Co. (the "Issuer") was reorganized pursuant to a Plan of Reorganization (the "Plan"). Under the terms of the Plan, on that date all of the Issuer's previously issued and outstanding common stock was automatically cancelled and extinguished, including the common stock beneficially owned, or deemed to be beneficially owned, by WBC, Mr. Mellin, Mr. Donnelley, and FOM (WBC, Mr. Mellin, Mr. Donnelley, and FOM, collectively, and together with SGF, the "Reporting Persons").
(8)	On the Effective Date, and pursuant to and upon effectiveness of the Plan, holders of common stock outstanding immediately before effectiveness who did not object to the Plan and who did not opt-out of certain releases provided in the Plan were issued an aggregate of 400,000 shares of the Issuer's common stock, par value $0.01 per share (the "New Common Stock"), simultaneously with the cancellation and extinguishment of shares described in footnote 7 above. Each of the Reporting Persons, other than SGF, was eligible to receive, and was issued its or his pro rata share of, such shares of New Common Stock.
(9)	Held by an immediate family member who shares Mr. Donnelley's household. Mr. Donnelley disclaims beneficial ownership of the shares owned by the immediate family member.
(10)	On the Effective Date, and pursuant to the Plan, the Prepetition Second Lien Secured Claims (as defined in the Plan) held by holders thereof were extinguished and the holders were issued certain Exchange Notes (as defined in the Plan). The Exchange Notes are convertible, at any time at the option of the holder, in the aggregate, into 1,300,000 shares of New Common Stock (or .2654 shares of New Common Stock for each $1 principal amount). SGF was a holder of Prepetition Second Lien Secured Claims and as such received its pro rata share of such Exchange Notes, having an aggregate principal amount of $17,775,807, convertible into 4,717,699 shares of New Common Stock.
(11)	On the Effective Date, and pursuant to the Plan, certain holders of indebtedness of the Issuer subscribed for and purchased New Money Notes (as defined in the Plan). The New Money Notes are convertible, at any time at the option of the holder, in the aggregate, into 3,051,818 shares of New Common Stock (or .2654 shares of New Common Stock for each $1 principal amount). SGF subscribed for and purchased New Money Notes having an aggregate principal amount of $7,125,323, convertible into 1,891,061 shares of New Common Stock.
Remarks: The Reporting Persons are all associated with an extended family group and various trusts, estates and estate planning vehicles established by certain deceased and surviving family members. Mr. Mellin acts in various capacities with respect to the family interests and has been deputized by certain family members, trusts, estates and estate planning vehicles (the "Deputizing Persons"), including the Reporting Persons, to serve on the board of directors of the reorganized Issuer. The Reporting Persons (together with certain of the other Deputizing Persons) may be deemed to constitute a group pursuant to Rule 13d-5(b) of the Securities Exchange Act of 1934. Each Reporting Person disclaims beneficial ownership of any shares of New Common Stock held by any other Reporting Person or Deputizing Person, except to the extent of any pecuniary interest such Reporting Person may have. Pursuant to the Plan, the Reporting Persons entered into a Stockholders Agreement by and among the Issuer, the Reporting Persons and certain other holders of New Common Stock (the "Stockholders Agreement"). The Stockholders Agreement provides, among other things, for the election of directors to the reorganized Issuer's board, for preemptive rights for certain stockholders, and for certain provisions relating to the sale or transfer of New Common Stock by the parties to the Stockholders Agreement. The Reporting Persons may be deemed as part of a group consisting of the stockholder parties to the Stockholders Agreement. Each Reporting Person disclaims beneficial ownership of any shares of New Common Stock held by any other party to the Stockholders Agreement, except to the extent of any pecuniary interest such Reporting Person may have.

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