Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock^F1	Aug 31, 2017	J	8,759,076	$0.00	D	0	D
Common Stock^F1	Aug 31, 2017	J	107,850	$0.00	A	107,850	D
Common Stock^F2	Aug 31, 2017	J	153,990	$0.00	D	0	D
Common Stock^F2	Aug 31, 2017	J	1,231	$0.00	A	1,231	D
Common Stock^F3	Aug 31, 2017	J	33,471	$0.00	D	0	D
Common Stock^F3	Aug 31, 2017	J	412	$0.00	A	412	D
Common Stock^F4,F9	Aug 31, 2017	J	14,739	$0.00	D	0	I	See Footnote
Common Stock^F4,F9	Aug 31, 2017	J	181	$0.00	A	181	I	See Footnote
Common Stock^F5	Aug 31, 2017	J	0	$0.00	D	0	D
Common Stock^F5	Aug 31, 2017	J	0	$0.00	A	0	D

Table II — derivative securities

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Exchange Notes^F6,F10	$0.2654	Aug 31, 2017	A	17,775,807	A	Aug 31, 2017	Aug 31, 2022	Common Stock	4,717,699	17,775,807	D
New Money Notes^F6,F11	$0.2654	Aug 31, 2017	A	7,125,323	A	Aug 31, 2017	Aug 31, 2022	Common Stock	1,891,061	7,125,323	D

Explanation of responses

F1These 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.
F10On 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.
F11On 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.
F2These 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.
F3These 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.
F4Mr. 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.
F5FOM Corp. ("FOM") does not have beneficial ownership of any shares of Common Stock.
F6These 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.
F7On 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").
F8On 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.
F9Held 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.

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.