UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D
(Rule 13d-101)

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
TO § 240.13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO
§ 240.13d-2(a)

(Amendment No. 9) 1

A. M. Castle & Co.
(Name of Issuer)

Common Stock, $0.01 par value
(Title of Class of Securities)

148411101
(CUSIP Number)
 
STEVE WOLOSKY, ESQ.
OLSHAN FROME WOLOSKY LLP
1325 Avenue of the Americas
New York, New York 10019
(212) 451-2300
(Name, Address and Telephone Number of Person
Authorized to Receive Notices and Communications)

May 16, 2016
(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box ¨ .

Note:   Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits.   See § 240.13d-7 for other parties to whom copies are to be sent.


_______________
1               The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes ).
 
 
 

 
CUSIP NO. 148411101
 
1
NAME OF REPORTING PERSON
 
Raging Capital Management, LLC
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
  (a)  x
  (b)  o
3
SEC USE ONLY
 
4
SOURCE OF FUNDS
 
AF
5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)
 
¨
6
CITIZENSHIP OR PLACE OF ORGANIZATION
 
DELAWARE
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH
7
SOLE VOTING POWER
 
- 0 -
8
SHARED VOTING POWER
 
4,630,795
9
SOLE DISPOSITIVE POWER
 
- 0 -
10
SHARED DISPOSITIVE POWER
 
4,630,795
11
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
4,630,795
12
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
 
o
13
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 
19.5%
14
TYPE OF REPORTING PERSON
 
IA

 
2

 
CUSIP NO. 148411101
 
1
NAME OF REPORTING PERSON
 
William C. Martin
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
  (a)  x
  (b)  o
3
SEC USE ONLY
 
4
SOURCE OF FUNDS
 
AF
5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)
 
¨
6
CITIZENSHIP OR PLACE OF ORGANIZATION
 
USA
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH
7
SOLE VOTING POWER
 
- 0 -
8
SHARED VOTING POWER
 
4,630,795
9
SOLE DISPOSITIVE POWER
 
- 0 -
10
SHARED DISPOSITIVE POWER
 
4,630,795
11
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
4,630,795
12
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
 
o
13
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 
19.5%
14
TYPE OF REPORTING PERSON
 
HC

 
3

 
CUSIP NO. 148411101
 
1
NAME OF REPORTING PERSON
 
Raging Capital Master Fund, Ltd.
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
  (a)  x
  (b)  o
3
SEC USE ONLY
 
4
SOURCE OF FUNDS
 
 
5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)
 
¨
6
CITIZENSHIP OR PLACE OF ORGANIZATION
 
CAYMAN ISLANDS
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH
7
SOLE VOTING POWER
 
- 0 -
8
SHARED VOTING POWER
 
- 0 -
9
SOLE DISPOSITIVE POWER
 
- 0 -
10
SHARED DISPOSITIVE POWER
 
- 0 -
11
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
- 0 -
12
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
 
o
13
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 
- 0 -
14
TYPE OF REPORTING PERSON
 
CO

 
4

 
CUSIP NO. 148411101
 
1
NAME OF REPORTING PERSON
 
Kenneth H. Traub
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
  (a)  x
  (b)  o
3
SEC USE ONLY
 
4
SOURCE OF FUNDS
 
PF, OO
5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)
 
¨
6
CITIZENSHIP OR PLACE OF ORGANIZATION
 
USA
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH
7
SOLE VOTING POWER
 
37,555
8
SHARED VOTING POWER
 
- 0 -
9
SOLE DISPOSITIVE POWER
 
18,888
10
SHARED DISPOSITIVE POWER
 
- 0 -
11
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
37,555
12
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
 
o
13
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 
Less than 1%
14
TYPE OF REPORTING PERSON
 
IN

 
5

 
CUSIP NO. 148411101
 
1
NAME OF REPORTING PERSON
 
Allan J. Young
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
  (a)  x
  (b)  o
3
SEC USE ONLY
 
4
SOURCE OF FUNDS
 
OO
5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)
 
¨
6
CITIZENSHIP OR PLACE OF ORGANIZATION
 
USA
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH
7
SOLE VOTING POWER
 
18,667
8
SHARED VOTING POWER
 
- 0 -
9
SOLE DISPOSITIVE POWER
 
- 0 -
10
SHARED DISPOSITIVE POWER
 
- 0 -
11
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
18,667
12
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
 
o
13
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 
Less than 1%
14
TYPE OF REPORTING PERSON
 
IN

 
6

 
CUSIP NO. 148411101
 
1
NAME OF REPORTING PERSON
 
Richard N. Burger
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
  (a)  x
  (b)  o
3
SEC USE ONLY
 
4
SOURCE OF FUNDS
 
 
5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)
 
¨
6
CITIZENSHIP OR PLACE OF ORGANIZATION
 
USA
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH
7
SOLE VOTING POWER
 
- 0 -
8
SHARED VOTING POWER
 
- 0 -
9
SOLE DISPOSITIVE POWER
 
- 0 -
10
SHARED DISPOSITIVE POWER
 
- 0 -
11
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
- 0 -
12
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
 
o
13
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 
- 0 -
14
TYPE OF REPORTING PERSON
 
IN

 
7

 
CUSIP NO. 148411101
 
1
NAME OF REPORTING PERSON
 
Robert L. Lerner
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
  (a)  x
  (b)  o
3
SEC USE ONLY
 
4
SOURCE OF FUNDS
 
 
5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)
 
¨
6
CITIZENSHIP OR PLACE OF ORGANIZATION
 
USA
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH
7
SOLE VOTING POWER
 
- 0 -
8
SHARED VOTING POWER
 
- 0 -
9
SOLE DISPOSITIVE POWER
 
- 0 -
10
SHARED DISPOSITIVE POWER
 
- 0 -
11
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 
- 0 -
12
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
 
o
13
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 
- 0 -
14
TYPE OF REPORTING PERSON
 
IN

 
8

 
CUSIP NO. 148411101
 
The following constitutes Amendment No. 9 to the Schedule 13D filed by the undersigned (“Amendment No. 9”).  This Amendment No. 9 amends the Schedule 13D as specifically set forth herein.
 
Item 6.
Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer .
 
Item 6 is hereby amended to add the following:
 
 
Amendment to Amended and Restated Transaction Support Agreement
 
The Issuer has entered into amendments (the “TSA Amendments”) to the previously disclosed Amended and Restated Transaction Support Agreements with certain holders (the “Supporting Holders”) of the Issuer’s 7.00% Convertible Senior Notes due 2017 (the “Existing Convertible Notes”), which provide for the terms of certain refinancing actions of the Issuer, including the issuance of new 5.25% Senior Secured Convertible Notes due 2019 (the “New Convertible Notes”) in exchange for Existing Convertible Notes (the “Convertible Note Exchanges”).  In order to accelerate the consummation of the Convertible Note Exchanges, the TSA Amendments eliminate the requirement that the Issuer’s resale registration statement on Form S-3 be declared effective by the Securities and Exchange Commission prior to closing.  In addition, the TSA Amendments permit the Supporting Holders to elect to exchange some or all of the Existing Convertible Notes directly into Shares of the Issuer on the same economic terms as would be applicable had they exchanged their Existing Convertible Notes for New Convertible Notes and then converted those New Convertible Notes into Shares of the Issuer.  The TSA Amendments did not amend any of the economic terms of the Convertible Note Exchanges.  The Issuer has disclosed that it expects to settle the foregoing issuances of Shares of the Issuer as early as May 16, 2016 and the issuance of the New Convertible Notes as promptly as practicable thereafter.  Raging Capital, which beneficially owns in the aggregate $4.2 million principal amount of the Existing Convertible Notes, $27.5 million principal amount of the Issuer’s 12.75% Senior Secured Notes due 2018 and approximately 19.5% of the outstanding Shares of the Issuer, executed a TSA Amendment on May 16, 2016.  Two of the Issuer’s directors, Kenneth H. Traub and Allan J. Young, are employees of Raging Capital.
 
The foregoing description of the terms of the TSA Amendment executed by Raging Capital is not complete and is qualified in its entirety by reference to the text of such TSA Amendment, which is attached as Exhibit 99.1 hereto and is incorporated herein by reference.
 
 
Exchange Agreement
 
In connection with the TSA Amendments, the Issuer distributed separate exchange agreements (the “Exchange Agreements”) to Supporting Holders providing for the exchange of Existing Convertible Notes into New Convertible Notes and/or Shares of the Issuer, at the Supporting Holders’ election.  On May 16, 2016, Raging Capital executed an Exchange Agreement pursuant to which it has agreed to exchange its Existing Convertible Notes for $2.94 million principal amount of New Convertible Notes.
 
The foregoing description of the terms of the Exchange Agreement executed by Raging Capital is not complete and is qualified in its entirety by reference to the text of such Exchange Agreement, which is attached as Exhibit 99.2 hereto and is incorporated herein by reference.
 
Item 7.
Material to be Filed as Exhibits .
 
Item 7 is hereby amended to add the following exhibits:
 
 
99.1
First Amendment to Amended and Restated Transaction Support Agreement, by and between Raging Capital Master Fund, Ltd. and A. M. Castle & Co., dated May 16, 2016.
 
 
99.2
Exchange Agreement, by and between Raging Capital Master Fund, Ltd. and A. M. Castle & Co., dated May 16, 2016.
 
 
9

 
CUSIP NO. 148411101
 
SIGNATURES
 
After reasonable inquiry and to the best of his knowledge and belief, each of the undersigned certifies that the information set forth in this statement is true, complete and correct.
 
Dated:  May 18, 2016
Raging Capital Master Fund, Ltd.
   
 
By:
Raging Capital Management, LLC
Investment Manager
   
 
By:
/s/ Frederick C. Wasch
   
Name:
Frederick C. Wasch
   
Title:
Chief Financial Officer


 
Raging Capital Management, LLC
   
 
By:
/s/ Frederick C. Wasch
   
Name:
Frederick C. Wasch
   
Title:
Chief Financial Officer


 
/s/ Frederick C. Wasch
 
Frederick C. Wasch, as attorney-in-fact for William C. Martin, Richard N. Burger and Robert L. Lerner


 
/s/ Kenneth H. Traub
 
Kenneth H. Traub


 
/s/ Allan J. Young
 
Allan J. Young


 
10