As Of	Filer	Filing¹	For·On·As	Docs:Size	Issuer		Filing Agent

  3/4/21  A.M. Castle & Co.                 10-K       12/31/20   83:18M                                    Toppan Merrill Bridge/FA 
  1/6/21‡ A.M. Castle & Co.                 15-12B       1/6/21    1:37K                                    Toppan Merrill/FA        
  1/6/21‡ A.M. Castle & Co.                 15-12G       1/6/21    1:20K                                    Toppan Merrill/FA        
  1/4/21‡ A.M. Castle & Co.                 EFFECT       1/4/21    1:2K                                     SEC #5                   
  1/4/21‡ A.M. Castle & Co.                 EFFECT       1/4/21    1:2K                                     SEC #5                   
  1/4/21‡ A.M. Castle & Co.                 EFFECT       1/4/21    1:7K                                     SEC #5                   
          A.M. Castle & Co. (Canada) Inc.
          Castle Metals de Mexicali, S.A. de C.V.
          Castle Metals de Mexico, S.A. de C.V.
          HY-Alloy Steels Co.
          Keystone Service, Inc.
          Keystone Tube Co., LLC
          Total Plastics, Inc.
12/31/20  A.M. Castle & Co.                 SC 13E3/A              1:23K  A.M. Castle & Co.                 Toppan Merrill/FA        
12/31/20  A.M. Castle & Co.                 S-8 POS    12/31/20    1:18K                                    Toppan Merrill/FA        
12/31/20  A.M. Castle & Co.                 POS AM                 1:51K                                    Toppan Merrill/FA        
          A.M. Castle & Co. (Canada) Inc.
          Castle Metals de Mexicali, S.A. de C.V.
          Castle Metals de Mexico, S.A. de C.V.
          HY-Alloy Steels Co.
          Keystone Service, Inc.
          Keystone Tube Co., LLC
          Total Plastics, Inc.
12/31/20  A.M. Castle & Co.                 POS AM                 1:18K                                    Toppan Merrill/FA        
12/31/20  A.M. Castle & Co.                 POS AM                 1:18K                                    Toppan Merrill/FA        
12/31/20  A.M. Castle & Co.                 8-K:3,8,9  12/28/20    2:36K                                    Toppan Merrill/FA        
12/30/20  Zundel Mark D                     4          Officer²    1:4K   A.M. Castle & Co.                 Toppan Merrill/FA        
12/30/20  Scheinkman Steven W.              4          Director²   1:4K   A.M. Castle & Co.                 Toppan Merrill/FA        
12/30/20  Edgar Marec Elden                 4          Dir.,Off.²  1:4K   A.M. Castle & Co.                 Toppan Merrill/FA        
12/30/20  Anderson Patrick R.               4          Officer²    1:4K   A.M. Castle & Co.                 Toppan Merrill/FA        
12/16/20  A.M. Castle & Co.                 8-K:1,2,9  12/10/20    2:1.2M                                   Toppan Merrill/FA        
11/16/20  A.M. Castle & Co.                 SC 13E3/A              2:425K A.M. Castle & Co.                 Toppan Merrill/FA        
11/16/20  A.M. Castle & Co.                 10-Q        9/30/20   64:6.2M                                                            
11/16/20  A.M. Castle & Co.                 8-K:2,8,9  11/16/20    2:268K                                                            

____________
‡	A non-Insider-Ownership Filing that was accepted after the SEC “closed” at 5:30:00pm ET.  The legal “Filed As Of” date may be the next, or another, day.
¹	Filing/Form Types:
	4	Statement of Changes in Beneficial Ownership of Securities by an Insider — Form 4 { The Filer is an Insider² of the Issuer }.
	8-K	Current Report — Form 8-K { Item 1: Business & Operations;  2: Financial Info;  3: Securities & Trading;  4: Accountants & Accounting;  5: Governance & Management;  6: Asset-Backed Securities;  7: Disclosures;  8: Events;  9: Financials }.
	10-K	Annual Report — Form 10-K.
	10-Q	Quarterly Report — Form 10-Q.
	15-12B	Certification of a Termination of Registration of a Class of Securities — Form 15.
	15-12G	Certification of a Termination of Registration of a Class of Securities — Form 15.
	EFFECT	SEC Notice of Effectiveness.
	POS AM	Post-Effective Amendment of a Registration Statement.
	S-8 POS	Post-Effective Amendment of a Form S-8 Registration.
	SC 13E3	Tender-Offer Statement by an Issuer – Going-Private Transaction — Schedule 13E-3.
	/A	Amendment to, or Amended version of, a previous Filing of this Type.
²	Insider:  The Filer is a Director, Officer, 10% Owner and/or Other “insider” of the Issuer.