| Date Filed | Type | Description |
| 03/04/2021 |
10-K
| Annual Report for the period ended December 31, 2020 |
| 01/05/2021 |
15-12B
| Form 15-12B - Securities registration termination [Section 12(b)]: |
| 01/05/2021 |
15-12G
| Form 15-12G - Securities registration termination [Section 12(g)]: |
| 01/05/2021 |
EFFECT
| Form EFFECT - Notice of Effectiveness: |
| 12/31/2020 |
SC 13E3/A
| Form SC 13E3/A - Going private transaction by certain issuers: [Amend] |
| 12/31/2020 |
S-8 POS
| Form S-8 POS - Securities to be offered to employees in employee benefit plans, post-effective amendments: |
| 12/31/2020 |
POS AM
| Form POS AM - Post-Effective amendments for registration statement: |
| 12/31/2020 |
POS AM
| Form POS AM - Post-Effective amendments for registration statement: |
| 12/31/2020 |
POS AM
| Form POS AM - Post-Effective amendments for registration statement: |
| 12/31/2020 |
8-K
| Material Modifications to Rights of Security Holders, Other Events, Financial Statements and Exhibits |
| 12/16/2020 |
8-K
| Entry into a Material Definitive Agreement, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance S... |
| 11/16/2020 |
SC 13E3/A
| Form SC 13E3/A - Going private transaction by certain issuers: [Amend] |
| 11/16/2020 |
10-Q
| Quarterly Report for the period ended September 30, 2020 |
| 11/16/2020 |
8-K
| Quarterly results |
| 10/30/2020 |
SC 13E3
| Form SC 13E3 - Going private transaction by certain issuers: |
| 10/30/2020 |
8-K
| Other Events Interactive Data |
| 10/22/2020 |
SC 13D/A
| SGF, LLC reports a 15.1% stake in A. M. Castle & Co. |
| 08/14/2020 |
10-Q
| Quarterly Report for the period ended June 30, 2020 |
| 08/14/2020 |
8-K
| Quarterly results |
| 07/16/2020 |
EFFECT
| Form EFFECT - Notice of Effectiveness: |
| 07/15/2020 |
424B3
| Form 424B3 - Prospectus [Rule 424(b)(3)]: |
| 07/02/2020 |
8-K
| Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Submission of Matters to a Vote of Security Holders... |
| 05/29/2020 |
DEF 14A
| Form DEF 14A - Other definitive proxy statements: |
| 05/29/2020 |
SD
| Form SD - |
| 05/18/2020 |
PRE 14A
| Form PRE 14A - Other preliminary proxy statements: |
| 05/15/2020 |
10-Q
| Quarterly Report for the period ended March 31, 2020 |
| 05/14/2020 |
8-K
| Quarterly results |
| 05/01/2020 |
8-K
| Entry into a Material Definitive Agreement, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance S... |
| 04/10/2020 |
SC 13D/A
| Scheinkman Steven W. reports a 1.3% stake in A.M. Castle & Co. |
| 04/10/2020 |
SC 13D/A
| Edgar Marec Elden reports a 0.7% stake in A.M. Castle & Co. |
| 04/10/2020 |
SC 13D/A
| Anderson Patrick R. reports a 0.7% stake in A.M. Castle & Co. |
| 03/31/2020 |
SC 13D/A
| WHITEBOX ADVISORS LLC reports a 28.9% stake in A.M. Castle & Co. |
| 03/31/2020 |
SC 13D/A
| Form SC 13D/A - General statement of acquisition of beneficial ownership: [Amend] |
| 03/31/2020 |
SC 13D/A
| Form SC 13D/A - General statement of acquisition of beneficial ownership: [Amend] |
|