Exhibit



Number 0		Shares 0

			SEE REVERSE FOR IMPORTANT NOTICES
			AND OTHER INFORMATION



A. M. CASTLE & CO.
a Corporation Formed Under the Laws of the State of Maryland



THIS CERTIFIES THAT Specimen is the owner of Zero (0) fully paid and nonassessable shares of Common Stock, $0.01 par value per share, of

A. M. Castle & Co.


(the “Corporation”) transferable on the books of the Corporation by the holder hereof in person or by its duly authorized attorney, upon surrender of this Certificate properly endorsed. This Certificate and the shares represented hereby are issued and shall be held subject to all of the provisions of the charter of the Corporation (the “Charter”) and the Bylaws of the Corporation and any amendments or supplements thereto.


IN WITNESS WHEREOF, the Corporation has caused this Certificate to be executed on its behalf by its duly authorized officers.


DATED:


	Steven W. Scheinkman, President and CEO




	Marec E. Edgar, Secretary



IMPORTANT NOTICES

The Corporation will furnish to any stockholder, on request and without charge, a full statement of the information required by Section 2-211(b) of the Corporations and Associations Article of the Annotated Code of Maryland with respect to the designations and any preferences, conversion and other rights, voting powers, restrictions, limitations as to dividends and other distributions, qualifications, and terms and conditions of redemption of the stock of each class which the Corporation has authority to issue and, if the Corporation is authorized to issue any preferred or special class in series, (i) the differences in the relative rights and preferences between the shares of each series to the extent set, and (ii) the authority of the Board of Directors to set such rights and preferences of subsequent series. The foregoing summary does not purport to be complete and is subject to and qualified in its entirety by reference to the Charter, a copy of which will be sent without charge to each stockholder who so requests. Such request must be made to the Secretary of the Corporation at its principal office.


NOTICE TO STOCKHOLDERS
PARTY TO THE STOCKHOLDERS AGREEMENT DATED _______ __, 2017, AS AMENDED,
BY AND AMONG THE CORPORATION AND ITS STOCKHOLDERS:

THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE BEEN ACQUIRED FOR INVESTMENT AND HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR ANY STATE SECURITIES OR BLUE SKY LAWS. THESE SECURITIES MAY NOT BE SOLD OR TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATION OR AN EXEMPTION THEREFROM UNDER SAID ACT OR LAWS. THE SECURITIES REPRESENTED BY THIS CERTIFICATE ARE ALSO SUBJECT TO A STOCKHOLDERS AGREEMENT DATED AS OF [●], 2017, BY AND AMONG THE ISSUER OF SUCH SECURITIES AND THE OTHER PARTIES NAMED THEREIN. THE TERMS OF SUCH STOCKHOLDERS AGREEMENT INCLUDE, AMONG OTHER THINGS, RESTRICTIONS ON TRANSFER OF THE SECURITIES REPRESENTED BY THIS CERTIFICATE. A COPY OF SUCH AGREEMENT MAY BE OBTAINED AT NO COST BY WRITTEN REQUEST MADE BY THE HOLDER OF RECORD OF THIS CERTIFICATE TO THE SECRETARY OF THE ISSUER.


KEEP THIS CERTIFICATE IN A SAFE PLACE. IF IT IS LOST, STOLEN OR DESTROYED, THE CORPORATION MAY REQUIRE A BOND OF INDEMNITY AS A CONDITION TO THE ISSUANCE OF A REPLACEMENT CERTIFICATE.

The following abbreviations, when used in the inscription on the face of this Certificate, shall be construed as though they were written out in full according to applicable laws or regulations:

TEN COM	-	as tenants in common		UNIF GIFT MIN ACT		Custodian
TEN ENT	-	as tenants by the entireties			(Custodian)		(Minor)
JT TEN	-	as joint tenants with right of
		survivorship and not as tenants in common		Under the Uniform Gifts to Minors Act of
						(State)

FOR VALUE RECEIVED, ________________HEREBY SELLS, ASSIGNS AND TRANSFERS UNTO

(NAME & ADDRESS, INCLUDING ZIP CODE & SS# OR OTHER IDENTIFYING # OF ASSIGNEE)
______________________________________(________________) shares of stock of the Corporation represented by this Certificate and does hereby irrevocably constitute and appoint
_______________________________________ attorney to transfer the said shares on the books of the Corporation, with full power of substitution in the premises.
Dated: _______________________

			NOTICE: THE SIGNATURE TO THIS ASSIGNMENT MUST CORRESPOND WITH THE NAME AS WRITTEN UPON THE FACE OF THE CERTIFICATE IN EVERY PARTICULAR, WITHOUT ALTERATION OR ENLARGEMENT OR ANY OTHER CHANGE.