Ownership Submission
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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(Print or Type Responses)
1. Name and Address of Reporting Person *
GARRETT THOMAS L
   2. Issuer Name and Ticker or Trading Symbol
CASTLE A M & CO [CAS] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Pres., Total Plastics, Inc.
(Last)
(First)
(Middle)
3400 NORTH WOLF ROAD		 3. Date of Earliest Transaction (Month/Day/Year)
03/18/2010
(Street)

FRANKLIN PARK, IL 60131		 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               14,836 D  
Common Stock               1,398.59 I Through 401(k) Plan (1)

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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) 03/18/2010   A   3,200     (3)   (3) Common Stock 3,200 $ 0 3,200 D  
Performance Share Unit (4) 03/18/2010   A   3,200 (5)     (6)   (6) Common Stock 3,200 (5) $ 0 3,200 (5) D  
Employee Stock Option (right to buy) $ 12.79 03/18/2010   A   6,300   03/18/2013 03/17/2018 Common Stock 6,300 $ 0 6,300 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
GARRETT THOMAS L
3400 NORTH WOLF ROAD
FRANKLIN PARK, IL 60131		       Pres., Total Plastics, Inc.  

Signatures

 Robert J. Perna, Attorney-in-Fact   03/22/2010
**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) Between February 24, 2009 and February 28, 2010 the reporting person acquired 8.17 shares of A. M. Castle & Co. common stock under the A. M. Castle & Co. 401(k) Plan. The information in this report is based upon a plan statement dated as of February 28, 2010.
(2) Each restricted stock unit represents a contingent right to receive one share of common stock of A. M. Castle & Co. (the "Company").
(3) The restricted stock units vest in full on December 31, 2012, provided the reporting person is employed by A. M. Castle & Co. on the vesting date.
(4) Each performance share unit (PSU) represents a contingent right to receive one share of A. M. Castle & Co. common stock.
(5) The grant amount of 3,200 PSUs assumes 100% vesting. Since payout for PSUs can range from 0% to 200%, the maximum number of shares that could vest and be distributed is 6,400.
(6) The PSUs will vest on December 31, 2012, if the reporting person remains employed by the Company over the performance period and the Company determines that it achieved certain total shareholder return ("TSR") performance goals. The performance period begins on January 1, 2010 and ends December 21, 2012. Once vested, payout for PSU's can range from 0% to 200% based on the Company's relative TSR over the performance period as compared to a group of peer companies. TSR is measured generally as the increase or decrease in the market value of Company common stock including the reinvestment of dividends.

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