Document:

A.M. CASTLE & CO. - 8-K

Exhibit 4.1

 

THIS
WARRANT HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 (THE “ACT”) OR ANY STATE SECURITIES LAW AND
THIS WARRANT MAY NOT BE OFFERED FOR SALE, SOLD, DELIVERED AFTER SALE, TRANSFERRED, ASSIGNED, PLEDGED OR HYPOTHECATED IN THE ABSENCE
OF AN EFFECTIVE REGISTRATION STATEMENT COVERING THIS WARRANT UNDER THE ACT AND ANY APPLICABLE STATE SECURITIES LAWS, OR AN EXEMPTION
FROM THE REGISTRATION REQUIREMENTS THEREOF.

 

WARRANT

 

THIS
WARRANT WILL BE VOID IF NOT EXERCISED PRIOR TO

 

5:00
P.M., NEW YORK CITY TIME, ON June 8, 2018

 

WARRANT
TO PURCHASE

 

______________
SHARES OF COMMON STOCK OF

 

A.M.
Castle & Co.

 

DISTRIBUTION
DATE: December 8, 2016

 

No. ________

 

This
certifies that, for value received, ___________________________, and its registered assigns (collectively, the “Holder”),
is entitled to purchase from A.M. Castle & Co., a corporation incorporated under the laws of the State of Maryland (the “Company”),
subject to the terms and conditions hereof, at any time before 5:00 p.m., New York time, on June 8, 2018, the number of fully
paid and non-assessable shares of Common Stock of the Company set forth above at the Exercise Price (as defined below). The Exercise
Price and the number and kind of shares purchasable hereunder are subject to adjustment from time to time as provided in Article
V of this Warrant. The initial Exercise Price shall be [$0.50][$0.65].

 

THIS
WARRANT (this “Warrant”) is made as of the eighth day of December, 2016 between the Company and the Holder.

  

WHEREAS,
the Company proposes to issue, on the date of this Warrant, warrants to purchase, in the aggregate, 5,000,000 shares of the Company’s
common stock, par value $0.01 per share, at an exercise price of (i) $0.50 in the case of 50% of the warrants and (ii) $0.65 in
the case of the remaining 50% of the warrants, to all Lenders (as defined in the Credit and Guaranty Agreement) under
the Credit and Guaranty Agreement (as defined below), on a pro rata basis, based upon the proportion of the Commitment (as defined
in the Credit and Guaranty Agreement) such Lender bears to the total Commitment;

  

WHEREAS,
all acts and things have been done and performed which are necessary to make this Warrant, when executed on behalf of the Company
and countersigned by or on behalf of the Holder, as provided herein, the valid, binding and legal obligations of the Company,
and to authorize the execution and delivery of this Warrant.

 

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NOW,
THEREFORE, in consideration of the mutual agreements herein contained, the parties hereto agree as follows:

 

ARTICLE
I

 

DEFINITIONS

 

Section
1.1 Definition of Terms. As used in this Warrant, the following capitalized terms shall have the following respective
meanings:

 

(a)
“Affiliate” of any specified Person means any other Person directly or indirectly controlling or controlled
by or under direct or indirect common control with such specified Person. For the purposes of this definition, “control,”
when used with respect to any specified Person, means the power to direct the management and policies of such Person, directly
or indirectly, whether through the ownership of voting securities, by contract or otherwise; and the terms “controlling”
and “controlled” have meanings correlative to the foregoing. 

 

(b) “Business
Day” shall mean any day other than a Saturday, Sunday or other day on which banks in the State of New York are authorized
by law to remain closed.

 

(c)
“Board” shall mean the Board of Directors of the Company.

 

(d)
“Credit and Guaranty Agreement” shall mean the Credit and Guaranty Agreement, dated as of December 8, 2016,
by and among the Company, Total Plastics Inc., A.M. Castle & Co. (Canada) Inc., Keystone Tube Company, LLC, HY-Alloy Steels
Company, Keystone Service, Inc., the Lenders party thereto from time to time and Cantor Fitzgerald, as administrative agent and
collateral agent.

 

(e)
“Exchange Act” shall mean the Securities Exchange Act of 1934, as amended.

 

(f) “Expiration
Date” shall mean 5:00 p.m., New York City time, on June 8, 2018, or if such day is not a Business Day, the next succeeding
day which is a Business Day.

 

(g) “NASDAQ”
shall mean The NASDAQ Stock Market (including any of its subdivisions such as the NASDAQ Global Select Market) or any successor
market thereto.

 

(h) “Common
Stock” shall mean common stock, $0.01 par value per share, of the Company. For purposes of Article IV hereof,
references to “shares of Common Stock” shall be deemed to include shares of any other class of stock resulting from
successive changes or reclassifications of the Common Stock consisting solely of changes in par value or from no par value to
par value and vice versa.

 

(i) “NYSE”
shall mean The New York Stock Exchange or any successor stock exchange thereto.

 

(j)
“OTC” shall mean the OTCQB® Venture Market or any successor market thereto.

 

(k)
“Permitted Sale” shall mean, directly or indirectly, in one or more related transactions, (a) any merger, consolidation,
recapitalization, reorganization or sale of the Company, or sale, transfer or issuance of voting securities of the Company or
any other transaction or series of related transactions (each, an “Acquisition”), in each case, in which the
holders of voting securities of the Company owning a majority of the voting power of the Company immediately prior to such transaction
do not own and control a majority of the voting power represented by the outstanding equity of the surviving entity or any direct
or indirect parent thereof after the closing of such transaction or (b) any sale, transfer or disposition of all or substantially
all of the assets of the Company to another Person in one or more transactions (each, an “Asset Sale”). Notwithstanding
the foregoing, an Acquisition by or Asset Sale to any Affiliate of the Company shall not be a Permitted Sale.

 

(l) “Person”
shall mean any individual, firm, corporation, limited liability company, partnership, trust or other entity, and shall include
any successor (by merger or otherwise) thereof or thereto.

 

(m) “Securities
Act” shall mean the Securities Act of 1933, as amended.

 

(n) “Warrant
Shares” shall mean Common Stock and any other securities purchased or purchasable upon exercise of this Warrant (and,
if the context requires, securities which may thereafter be issued by the Company in respect of any such securities, by means
of any stock splits, stock dividends, recapitalizations, reclassifications or the like, including as set forth in Article III).

 

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Section
1.2 Table of Defined Terms.

 

	Term	 	Section
    Number
	Aggregated Person	 	Section 2.10
	Company	 	Recitals
	Distribution	 	Section 3.1(b)
	Exercise Amount	 	Section 2.5(a)
	Exercise Form	 	Section 2.3(a)
	Exercise Price	 	Section 2.1
	Fundamental Change	 	Section 2.1(c)
	Holder	 	Recitals
	Restricted Ownership
    Percentage	 	Section 2.10
	Section 16 Conversion
    Blocker	 	Section 2.10
	Warrant	 	Recitals

   

ARTICLE
II

 

TERMS
AND EXERCISE OF WARRANT

 

Section
2.1 Exercise Price. As of the Date of this Warrant, this Warrant shall entitle the Holder, subject to the provisions
of this Warrant, to purchase from the Company (and the Company shall issue and sell to each Holder) the number of Warrant
Shares, at the price of [$0.50][$0.65] per whole share (as the same may be hereafter adjusted pursuant to Article III,
the “Exercise Price”).

 

Section
2.2 Duration of Warrant. This Warrant may be exercised by the Holder, in whole or in part, at any time and from time
to time during the period commencing on the date of this Warrant and terminating at 5:00 p.m., New York City time, on the Expiration
Date. The Warrant, or any portion thereof, not exercised prior to 5:00 p.m., New York City time, on the Expiration Date, shall
become permanently and irrevocably null and void at 5:00 p.m., New York City time, on the Expiration Date, and all rights thereunder
and all rights in respect thereof under this Warrant shall cease at such time. Notwithstanding the foregoing, this Warrant shall
terminate and cease to be exercisable on the date of the completion of a Permitted Sale where the consideration is payable in
cash. If the completion of a Permitted Sale where the consideration is payable in cash occurs and (i) the per share sale price
of the Company is less than the Exercise Price, then the Warrant shall terminate and cease to be exercisable concurrently with
the completion of the Permitted Sale for no consideration, or (ii) the per share sale price of the Company is greater than the
Exercise Price, then the Warrant shall be terminated and cease to be exercisable concurrently with the completion of the Permitted
Sale and in exchange therefor the Company shall pay the Holder in cash the difference between the Exercise Price and the per share
sale price of the Company.

 

Section
2.3 Method of Exercise.

 

(a) Subject
to the provisions of this Warrant, the Holder may exercise such Holder’s right to purchase the Warrant Shares, in whole
or from time to time in part, by: providing an exercise form for the election to exercise such Warrant (“Exercise Form”)
substantially in the form of Exhibit A hereto, properly completed and duly executed by the Holder, and providing payment to the
Company of the Exercise Amount, to the Company.

 

(b) Any
exercise of a Warrant pursuant to the terms of this Warrant shall be irrevocable and shall constitute a binding agreement between
the Holder and the Company, enforceable in accordance with its terms.

  

(c) The
Company reserves the right to reasonably reject any and all Exercise Forms not in proper form. Such determination by the Company
shall be final and binding on the Holder, absent manifest error. Moreover, the Company reserves the absolute right to waive any
of the conditions to the exercise of the Warrant or defects in Exercise Forms with regard to any particular exercise of this Warrant.
The Company shall not be under any duty to give notice to the Holder of any irregularities in any exercise of this Warrant, nor
shall it incur any liability for the failure to give such notice.

 

Section
2.4 Issuance of Warrant Shares. Upon exercise of this Warrant pursuant to Section 2.3 and clearance
of the funds in payment of the Exercise Price, the Company shall promptly at its expense, and in no event later than ten (10)
Business Days thereafter, calculate and cause to be issued to the Holder the total number of whole Warrant Shares for which this
Warrant is being exercised (as the same may be hereafter adjusted pursuant to Article III). A book-entry interest in the
Warrant Shares shall be registered on the books of the Company’s transfer agent or, at the Holder’s option, a physical
certificate representing the number of Warrant Shares to which such Holder is entitled, in fully registered form, registered in
such name or names as may be directed by such Holder shall be delivered to the address designated by the Holder on its Exercise
Form.

 

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Section
2.5 Exercise of Warrant. This Warrant or any portion thereof may be exercised by the Holder at any time or from time
to time during the period specified in Section 2.2 hereof by delivery of payment to the Company, by wire transfer of immediately
available funds to an account designated by the Company, of the full Exercise Price for the number of Warrant Shares specified
in the Exercise Form (which shall be equal to the Exercise Price multiplied by the number of Warrant Shares in respect of which
any Warrants are being exercised) and, to the extent required by Section 5.5 hereof, any and all applicable taxes and charges
due in connection with the exercise of Warrants and the exchange of Warrants for Warrant Shares (the “Exercise Amount”).

 

Section
2.6 Reservation of Shares. The Company hereby agrees that at all times there shall be reserved for issuance and delivery
upon exercise of this Warrant such number of Warrant Shares as may be from time to time issuable upon exercise in full of this
Warrant. All Warrant Shares shall be duly authorized, and when issued upon such exercise, shall be validly issued, fully paid
and non-assessable, free and clear of all taxes (subject to Section 6.5), liens, security interests, charges and other
encumbrances or restrictions of any kind (other than any applicable restrictions under federal and state securities laws) and
free and clear of all preemptive rights or similar rights of stockholders, and the Company shall take all such action as may be
necessary or appropriate in order that the Company may validly and legally issue all Warrant Shares in compliance with this sentence.
If at any time prior to the Expiration Date the number and kind of authorized but unissued shares of the Company’s capital
stock shall not be sufficient to permit exercise in full of this Warrant, the Company will promptly take such corporate action
as may, in the opinion of its counsel, be necessary to increase its authorized but unissued shares to such number of shares as
shall be sufficient for such purposes. The Company agrees that its issuance of this Warrant shall constitute full authority to
its officers who are charged with the issuance of Warrant Shares to issue shares of Common Stock upon the exercise of this Warrant.
Without limiting the generality of the foregoing, the Company will not increase the stated or par value per share, if any, of
the Common Stock above the Exercise Price in effect immediately prior to such increase in stated or par value and will from time
to time take all actions reasonably necessary to ensure that the stated or par value per share, if any, of the Common Stock is
at all times less than the Exercise Price then in effect.

 

Section
2.7 Fractional Shares. The Company shall not be required to issue any fraction of a share of its capital stock in
connection with the exercise of this Warrant. All shares of capital stock issuable upon coersion of more than one Warrant by a
holder thereof shall be aggregated for purposes of determining whether the conversion would result in the issuance of any fractional
share. If, after the aforementioned aggregation, the conversion would result in the issuance of any fractional share, the Company
shall, in lieu of issuing any fractional share, round such fraction of a share to the nearest whole number of shares. For the
avoidance of doubt, 0.5 of a share shall be rounded to one (1) share.

 

Section
2.8 Listing. To the extent the underlying Common Stock of the Company is then listed on a national securities exchange
or stock market, the Company shall secure the listing of shares of Common Stock issuable from time to time upon exercise of this
Warrant or other Warrant Shares on the national securities exchange or stock market, if any, upon which shares of Common Stock
(or securities of the same class as such other Warrant Shares, if applicable) are then listed (subject to official notice of issuance
upon exercise of Warrants) and shall maintain, so long as any other shares of Common Stock (or, as applicable, other securities)
shall be so listed, such listing of all Warrant Shares from time to time issuable upon the exercise of Warrants. If the underlying
Common Stock is not listed on a national securities exchange or stock market, but is listed on the OTC, then the Company shall
secure the listing of shares of Common Stock issuable from time to time upon exercise of this Warrant or other Warrant Shares
on the OTC and shall maintain, so long as any other shares of Common Stock (or, as applicable, other securities) shall be so listed,
such listing of all Warrant Shares from time to time issuable upon the exercise of Warrants.

 

Section
2.9 Redemption. This Warrant shall not be redeemable by the Company or any other Person.

 

Section
2.10 Certain Limitations on Issuance of Common Stock.

 

(a)
Notwithstanding any other provision of this Warrant, for so long as the Common Stock is registered under the Exchange Act, the
Holder shall not be entitled to receive shares of Common Stock upon exercise of this Warrant during any period of time in which
the aggregate number of shares of Common Stock that may be acquired by the Holder upon exercise of the Warrant shall, when added
to the aggregate number of shares of Common Stock deemed beneficially owned, directly or indirectly, by such holder and each person
subject to aggregation of common stock with such holder under Section 13 or Section 16 of the Exchange Act and rules promulgated
thereunder at such time (an “Aggregated Person”) (other than by virtue of the ownership of securities or rights
to acquire securities that have limitations on the holder’s or such person’s right to convert, exercise or purchase
similar to this limitation), as determined pursuant to the rules and regulations promulgated under Section 13(d) of the Exchange
Act, exceed 9.99% (the “Restricted Ownership Percentage”) of the total issued and outstanding shares of Common
Stock (the “Section 16 Conversion Blocker”). Notwithstanding the foregoing, this Section 16 Conversion Blocker
shall not apply with respect to the Holder if the Holder is subject to Section 16(a) of the Exchange Act without regard to the
aggregate number of shares of Common Stock issuable upon exercise of this Warrant and upon conversion, exercise or sale of securities
or rights to acquire securities that have limitations on the Holder’s right to convert, exercise or purchase similar to
this limitation.

 

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(b)
Notwithstanding the foregoing, the Company shall issue shares of Common Stock upon exercise of this Warrant up to (but not exceeding)
the amount that would cause the Holder (together with any Aggregated Person) to equal the Restricted Ownership Percentage; provided
that each Holder shall have the right at any time and from time to time to reduce the Restricted Ownership Percentage applicable
to the Holder immediately upon prior written notice to the Company (provided that, for the avoidance of doubt, in such event,
the Holder may sell shares of Common Stock or this Warrant to reduce the aggregate number of shares of Common Stock deemed beneficially
owned by such holder (together with any Aggregated Person) to a level below the reduced Restricted Ownership Percentage, in which
case the this Warrant will be exercisable by the Holder up to (but will not exceed) the reduced Restricted Ownership Percentage)
or increase the Restricted Ownership Percentage applicable to the Holder (together with any Aggregated Person) upon 65 days’
prior written notice to the Company.

 

ARTICLE
III

 

ADJUSTMENT
OF SHARES OF COMMON STOCK PURCHASABLE AND OF EXERCISE PRICE

 

The
Exercise Price and the number and kind of Warrant Shares shall be subject to adjustment from time to time upon the happening of
certain events as provided in this Article III.

 

Section
3.1 Mechanical Adjustments.

 

(a) Subject
to the provisions of Section 2.7, if at any time prior to the exercise in full of this Warrant, the Company shall (i) pay
or declare a dividend or make a distribution on the Common Stock, in each case, payable in shares of its capital stock (whether
shares of Common Stock or of capital stock of any other class), (ii) subdivide, split, reclassify or recapitalize its outstanding
Common Stock into a greater number of shares, (iii) combine, reclassify or recapitalize its outstanding Common Stock into a smaller
number of shares, or (iv) issue any shares of its capital stock by reclassification of its Common Stock (including any such reclassification
in connection with a consolidation or a merger in which the Company is the continuing corporation), then the Exercise Price in
effect at the time of the record date of such event shall be adjusted (either upward or downward, as the case may be) so that
the Holder shall be entitled to receive the aggregate number and kind of shares which, if their Warrants had been exercised in
full immediately prior to such event, the Holder would have owned upon such exercise and been entitled to receive by virtue of
such event. Any adjustment required by this Section 3.1(a) shall be made successively immediately after the earlier of
the record date or the effective date of such event, as applicable, whenever any event in this Section 3.1(a) shall occur,
to allow the purchase of such aggregate number and kind of shares.

 

(b) If
the Company distributes to holders of its Common Stock any assets (including but not limited to cash), securities, or warrants
to purchase securities (including but not limited to Common Stock), other than as described in Section 3.1(a) or Section
3.1(c) (any such non-excluded event being referred to herein as a “Distribution”), then the Exercise Price
shall be decreased, effective immediately after the record or other distribution date of such Distribution, by the amount of cash
and/or fair market value (as determined in good faith by the Board after consultation with an investment banking firm of nationally
recognized standing) of any securities or assets paid or distributed on each share of Common Stock in respect of such Distribution.
Simultaneously with any adjustment of the Exercise Price pursuant to this Section 3.1(b), the number of Warrant Shares
able to be purchased upon the exercise hereof shall be increased proportionately based on the adjustment to the Exercise Price.
Any adjustment required by this Section 3.1(b) shall be made successively immediately after the earlier of the record date
or distribution date whenever any event in this Section 3.1(b) shall occur to allow the purchase of the aggregate number
and kind of shares to which the Holder may be entitled.

 

(c) If
any transaction or event (including, but not limited to, any merger, consolidation, sale of all or substantially all of the assets
of the Company and its Subsidiaries, tender or exchange offer, reorganization, reclassification, compulsory share exchange or
liquidation) occurs in which all or substantially all of the outstanding Common Stock is converted into or exchanged for stock,
other securities, cash or assets or receives a dividend of the proceeds from any such transaction (each, a “Fundamental
Change”), the Holder will have the right upon any subsequent exercise (and payment of the applicable Exercise Price)
to receive (but only out of legally available funds, to the extent required by applicable law) the kind and amount of stock, other
securities, cash and assets that the Holder would have received if this Warrant had been exercised pursuant to the terms hereof
immediately prior thereto (assuming this Holder failed to exercise his rights of election, if any, as to the kind or amount of
securities, cash or other property receivable upon such Fundamental Change). Any adjustment required by this Section 3.1(c) shall be made successively immediately after the earlier of the record date or the effective date, as applicable, whenever
any event in this Section 3.1(c) shall occur, to allow the purchase of the aggregate number and kind of shares or other
consideration to which the Holder may be entitled. The Company will not effect any capital reorganization or reclassification
of its capital stock, or any consolidation or merger, or the sale of all or substantially all of its assets (where there is a
change in or distribution with respect to the Common Stock) unless prior to the consummation thereof the successor Person (if
other than the Company) shall assume by written instrument the obligation to deliver to the Holder such shares of stock, securities
or assets as, in accordance with the foregoing provisions, the Holder may be entitled to purchase.

 

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(d) Subject
to the provisions of Section 2.7, whenever the Exercise Price payable upon exercise of this Warrant is adjusted pursuant
to Section 3.1(a), the number of Warrant Shares issuable upon exercise of this Warrant shall simultaneously be adjusted
to a number of Warrant Shares determined by multiplying the number of Warrant Shares initially issuable upon exercise of this
Warrant by the Exercise Price in effect on the date of such adjustment and dividing the product so obtained by the Exercise Price,
as adjusted.

  

(e) If,
at any time after the Issue Date, any adjustment is made to the applicable Exercise Price pursuant to this Section 3.1,
such adjustment to the Exercise Price will be applicable with respect to this Warrant and all warrants issued in exchange or substitution
therefor on or after the date of the event causing such adjustment to the Exercise Price.

 

(f) No
adjustment in the Exercise Price shall be required unless such adjustment would require an increase or decrease of at least one
cent ($0.01) in such price; provided, however, that any adjustments which by reason of this Section 3.1(f)
are not required to be made shall be carried forward and taken into account in any subsequent adjustment. All calculations under
this Section 3.1 shall be made to the nearest cent ($0.01) (with $.005 being rounded upward) or to the nearest one-hundredth
of a share (with .005 of a share being rounded upward), as the case may be. Notwithstanding anything in this Section 4.1
to the contrary, the Exercise Price shall not be reduced to less than the then existing par value of the Common Stock as a result
of any adjustment made hereunder.

 

(g) In
the event that at any time, as a result of any adjustment made pursuant to Section 3.1(a), Section 3.1(b) or Section
3.1(c), the Holder thereafter shall become entitled to receive any shares of the Company other than Common Stock, thereafter
the number of such other shares so receivable upon exercise of any Warrant shall be subject to adjustment from time to time in
a manner and on terms as nearly equivalent as practicable to the provisions with respect to the Common Stock contained in this
Section 3.1.

 

(h) The
Company will not take any action that results in any adjustment hereunder if the total number of shares of Common Stock issuable
after such action upon exercise in full of the Warrant, together with all shares of Common Stock then outstanding and all shares
of Common Stock then issuable upon exercise of all options and upon conversion of all convertible securities then outstanding,
would exceed the total number of shares of Common Stock then authorized by the Company’s Articles of Incorporation, as amended
from time to time.

 

Section
3.2 Notices of Adjustment. Whenever the number and/or kind of Warrant Shares or the Exercise Price is adjusted as
herein provided, the Company shall (i) prepare and deliver, or cause to be prepared and delivered, forthwith to the Holder a certificate
signed by its Chairman of the Board, its Chief Executive Officer, its President, any Vice President or its Treasurer setting forth
the adjusted number and/or kind of shares purchasable upon the exercise of this Warrant and the Exercise Price of such shares
after such adjustment, the facts requiring such adjustment and the computation by which adjustment was made, and (ii) give written
notice to the Holder in the manner provided in Section 7.2 below, which notice shall state the record date or the effective
date of the event in addition to the adjusted number and/or kind of shares purchasable upon the exercise of this Warrant and the
Exercise Price of such shares after such adjustment, the facts requiring such adjustment and the computation by which adjustment
was made. Failure to give such notice, or any defect therein, shall not affect the legality or validity of such event.

 

Section
3.3 Form of Warrant After Adjustments. The form of the Warrant need not be changed because of any adjustments in the Exercise
Price or the number or kind of the Warrant Shares, and Warrants theretofore or thereafter issued may continue to express the same
price and number and kind of shares as are stated in Warrants, as initially issued. The Company, however, may at any time in its
sole discretion make any change in the form of Warrant that it may deem appropriate to give effect to such adjustments and that
does not affect the substance of the Warrant, and any Warrant thereafter issued, whether in exchange or substitution for an outstanding
Warrant or otherwise, may be in the form so changed.

 

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ARTICLE
IV

 

TRANSFER
AND EXCHANGE 

OF
WARRANT AND WARRANT SHARES

 

Section
4.1 Transfers and Exchanges.

 

(a) This
Warrant and all rights hereunder are and will be transferable, in whole or in part, by the Holder without charge to the Holder,
upon surrender of this Warrant to the Company at its then principal executive offices with a properly completed and duly executed
assignment agreement substantially in the form of Exhibit B hereto. Upon such compliance, surrender and delivery, the Company
shall execute and deliver a new Warrant or Warrants in the name of the assignee or assignees and in the denominations specified
in such instrument of assignment, and shall issue to the assignor a new Warrant evidencing the portion of this Warrant, if any,
not so assigned and this Warrant shall promptly be cancelled. No service charge shall be made to a Holder for any registration,
transfer or exchange, but the Company may require payment of a sum sufficient to cover any stamp or other tax or other charge
that may be imposed on the Holder in connection with any such exchange or registration of transfer.

 

(b) Restrictions
on Transfer. No Warrants or Warrant Shares shall be sold, exchanged or otherwise transferred in violation of the Securities
Act or state securities laws.

 

(c)
Fractional Warrants. The Company shall not be required to effect any transfer or exchange which will result in the issuance
of a warrant certificate for a fraction of a Warrant.

 

ARTICLE
V

 

OTHER
PROVISIONS RELATING TO RIGHTS OF HOLDERS OF WARRANTS

 

Section
5.1 No Rights or Liability as Stockholder; Notice to Holders. Nothing contained in this Warrant shall be construed
as conferring upon the Holder or his, her or its transferees the right to vote or to receive dividends or to consent or to receive
notice as a stockholder in respect of any meeting of stockholders for the election of directors of the Company or of any other
matter, or any rights whatsoever as stockholders of the Company. No provision thereof and no mere enumeration therein of the rights
or privileges of the Holder shall give rise to any liability of such holder for the Exercise Price hereunder or as a stockholder
of the Company, whether such liability is asserted by the Company or by creditors of the Company. To the extent not covered by
any statement delivered pursuant to Section 3.2, the Company shall give notice to the Holder by registered mail if at any
time prior to the expiration or exercise in full of the Warrant:

 

(a) any
dividend or distribution (whether payable in cash, securities or other assets) upon the Common Stock shall be approved by the
Company’s Board;

 

(b) an
offer for subscription pro rata to the holders of Common Stock of any additional shares of stock of any class or other securities
or rights shall be approved by the Company’s Board;

 

(c) a
dissolution, liquidation or winding up of the Company shall be approved by the Company’s Board;

 

(d) any
of the following additional events shall be approved by the Company’s Board: a capital reorganization or reclassification
of the Common Stock; any consolidation or merger of the Company with or into another Person (other than a consolidation or merger
in which the Company is the continuing corporation and that does not result in any reclassification or change of Common Stock
outstanding); any sale or conveyance to another Person of all or substantially all of the assets of the Company; or any other
Fundamental Change.

 

Such
giving of notice shall be initiated at least ten (10) Business Days prior to the date fixed as a record date or effective date
or the date of closing of the Company’s stock transfer books for the determination of the stockholders entitled to vote
on any of the events described in clauses (a)-(d) immediately above. Such notice shall specify such record date or the date of
closing the stock transfer books or the date the relevant event shall take place, as the case may be, a reasonably detailed description
of such event, and the anticipated timing thereof. Failure to provide such notice shall not affect the validity of any action
taken in connection with such proposed event. For the avoidance of doubt, no such notice shall supersede or limit any adjustment
called for by Section 3.1 by reason of any event as to which notice is required by this Section 5.1.

 

Section
5.2 Lost, Stolen, Mutilated or Destroyed Warrants. If this Warrant is lost, stolen, mutilated or destroyed, the Company
shall issue, sign and deliver, in exchange and substitution for and upon cancellation of the mutilated Warrant, or in lieu of
and substitution for this Warrant, as applicable, lost, stolen or destroyed, a new Warrant certificate of like tenor and representing
an equivalent number of Warrants, but only upon receipt of evidence and an affidavit reasonably satisfactory to the Company of
the loss, theft or destruction of the Warrant, or the posting of an indemnity or bond of the Company for any losses in connection
therewith, if requested by the Company, also satisfactory to it. Applicants for such substitute Warrant shall also comply with
such other reasonable regulations and pay such other reasonable charges as the Company may prescribe and as required by Section
8-405 of the Uniform Commercial Code as in effect in the State of New York.

 

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Section
5.3 Restrictions on Exercise and Transfer.

 

(a)       Neither
this Warrant nor the Warrant Shares issuable upon exercise of this Warrant have been registered under the Securities Act or any
state securities act (collectively, the “Acts”). Therefore, in order among other things, to ensure compliance
with the Acts and notwithstanding anything else in the Warrant to the contrary, this Warrant and the Warrant Shares that may be
issued upon the exercise hereof, may not be sold or transferred in the absence of (i) an effective registration statement or post-effective
amendment thereto for such Warrant or Warrant Shares under the Acts, or (ii) Holder’s delivery to the Company of an opinion
of counsel, reasonably satisfactory to the Company, that an exemption from the registration requirements of the Acts is available.

 

(b)       Notwithstanding
Section 5.3(a), this Warrant and the Warrant Shares issuable upon exercise of this Warrant are subject to the terms and
conditions of a Registration Rights Agreement, dated as of December 8, 2016, among the Company and Holders (the “Registration
Right Agreement”) providing for the registration under the Securities Act of the resale of the Warrant Shares issuable upon
exercise of the Warrants.

 

Section
5.4 Legends of Shares. Until such time as the registration statement filed pursuant to the above mentioned Registration
Rights Agreement is declared effective, each certificate for Warrant Shares initially issued upon exercise of this Warrant shall
bear a legend in substantially the following form (and any additional legend required under said Acts, the Company’s Certificate
of Incorporation or By-Laws or otherwise):

 

“THE
SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 (THE “ACT”) OR
ANY STATE SECURITIES LAW AND SUCH SECURITIES MAY NOT BE OFFERED FOR SALE, SOLD, DELIVERED AFTER SALE, TRANSFERRED, ASSIGNED, PLEDGED
OR HYPOTHECATED IN THE ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT COVERING SUCH SECURITIES UNDER THE ACT AND ANY APPLICABLE
STATE SECURITIES LAWS, OR AN EXEMPTION FROM THE REGISTRATION REQUIREMENTS THEREOF.”

 

Any
certificate issued at any time in exchange or substitution for any certificate bearing such legend (except a new certificate issued
upon completion of a public distribution pursuant to a registration statement under the Acts of the securities represented thereby)
shall also bear such legend unless, in the reasonable opinion of counsel for the Company, the securities represented thereby need
no longer be subject to the transfer restrictions contained in this Warrant. The exercise and transfer restriction provisions
of this Warrant shall be binding upon the subsequent Holders of the Warrant.

 

Section
5.5 Cancellation of Warrants. If the Company shall purchase or otherwise acquire this Warrant, this Warrant shall
be cancelled and retired.

 

Section
5.6 Payment of Taxes. The Company will from time to time promptly pay all taxes and charges that may be imposed upon
the Company in respect of the issuance or delivery of the Warrant Shares upon the exercise of the Warrant, but any taxes or charges
in connection with the issuance of Warrant Shares in any name other than that of the Holder of the Warrant shall be paid by the
Holder; and in any such case, the Company shall not be required to issue or deliver any Warrant Shares until such taxes or charges
shall have been paid or it is established to the Company’s reasonable satisfaction that no tax or charge is due.

 

ARTICLE
VI

 

MISCELLANEOUS
PROVISIONS

 

Section
6.1 Binding Effects; Benefits. This Warrant shall inure to the benefit of and shall be binding upon the Company and
the Holder and their respective heirs, legal representatives, successors and assigns. Nothing in this Warrant, expressed or implied,
is intended to or shall confer on any Person other than the Company and the Holder, or their respective heirs, legal representatives,
successors or assigns, any rights, remedies, obligations or liabilities under or by reason of this Warrant.

 

    8 

     

    

 

Section
6.2 Notices. Any notice or other communication required or which may be given hereunder shall be in writing and shall
be sent by certified or registered mail, by private national courier service (return receipt requested, postage prepaid), by personal
delivery or by electronic or facsimile transmission. Such notice or communication shall be deemed given (a) if mailed, two days
after the date of mailing, (b) if sent by national courier service, one Business Day after being sent, (c) if delivered personally,
when so delivered, or (d) if sent by electronic or facsimile transmission, on the Business Day after such transmission is sent,
in each case as follows:

 

if
to the Company, to:

 

A.M.
Castle & Co.

1420 Kensington Court, Suite 220

Oak Brook, IL 60523

Facsimile No.: (847) 349-2516

Attention: Marec E. Edgar

 

with
a copy (which shall not constitute notice) to:

 

Winston
& Strawn LLP

35 West Wacker Drive

Chicago, IL 60601

Facsimile No.: (312) 558-5600

Attention: R. Cabell Morris and Karen A. Weber

 

if
to the Holder, to:

 

[●]

 

Section
6.3 Persons Having Rights under this Warrant. Nothing in this Warrant expressed and nothing that may be implied from
any of the provisions hereof is intended, or shall be construed, to confer upon, or give to, any Person other than the parties
hereto and the Holder, any right, remedy, or claim under or by reason of this Warrant or of any covenant, condition, stipulation,
promise, or agreement hereof. All covenants, conditions, stipulations, promises, and agreements contained in this Warrant shall
be for the sole and exclusive benefit of the parties hereto, their successors and assigns and the Holder.

  

Section
6.4 Counterparts. This Warrant may be executed in any number of original, facsimile, PDF or electronic counterparts
and each of such counterparts shall for all purposes be deemed to be an original, and all such counterparts shall together constitute
but one and the same instrument.

 

Section
6.5 Effect of Headings. The section headings herein are for convenience only and are not part of this Warrant and
shall not affect the interpretation hereof.

 

Section
6.6 Amendments.

 

(a) Subject
to Section 6.6(b) below, this Warrant may not be amended except in writing signed by all parties hereto.

 

(b) The
Company may from time to time supplement or amend this the Warrant (a) without the approval of the Holder in order to cure any
ambiguity, manifest error or other mistake in this Warrants, or to correct or supplement any provision contained herein or in
this Warrant that may be defective or inconsistent with any other provision herein, or to make any other provisions in regard
to matters or questions arising hereunder that the Company may deem necessary or desirable and that shall not adversely affect,
alter or change the interests of the Holder or (b) with the prior written consent of the Holder. Any amendment, modification or
waiver effected pursuant to and in accordance with the provisions of this Section 6.6 will be binding upon the Holder and
upon each future holder of the Warrant and the Company. In the event of any amendment, modification or waiver, the Company will
give prompt notice thereof to the Holder.

 

Section
6.6 No Inconsistent Agreements. The Company will not, on or after the date hereof, enter into any agreement with respect
to its securities which conflicts with the rights granted to the Holder in this Warrant or the provisions hereof. The Company
represents and warrants to the Holder that, as of the date hereof, the rights granted hereunder do not in any way conflict with
the rights granted to holders of the Company’s securities under any other agreements.

 

    9 

     

    

 

Section
6.7 Integration/Entire Agreement. This Warrant and the other agreements and documents referenced herein constitute
the complete agreement among the Company and the Holder with respect to the subject matter hereof and supersede all prior agreements,
oral or written, between or among the parties with respect thereto.

  

Section
6.8 Governing Law, Etc. This Warrant shall be deemed to be a contract made under the laws of the State of New York
and for all purposes shall be governed by and construed in accordance with the laws of such State. Each party hereto consents
and submits to the jurisdiction of the courts of the State of New York and of the federal courts of the Southern District of New
York in connection with any action or proceeding brought against it that arises out of or in connection with, that is based upon,
or that relates to this Warrant or the transactions contemplated hereby. In connection with any such action or proceeding in any
such court, each party hereto hereby waives personal service of any summons, complaint or other process and hereby agrees that
service thereof may be made in accordance with the procedures for giving notice set forth in Section 6.2 hereof. Each party
hereto hereby waives any objection to jurisdiction or venue in any such court in any such action or proceeding and agrees not
to assert any defense based on forum non conveniens or lack of jurisdiction or venue in any such court in any such action
or proceeding.

 

Section
6.9 Termination. This Warrant shall terminate on the Expiration Date. The provisions of this Article VI shall
survive such termination.

 

Section
6.10 Waiver of Trial by Jury. Each party hereto hereby irrevocably and unconditionally waives the right to a trial
by jury in any action, suit, counterclaim or other proceeding (whether based on contract, tort or otherwise) arising out of, connected
with or relating to this Warrant and the transactions contemplated hereby.

 

Section
6.11 Severability. In the event that any one or more of the provisions contained herein or in this Warrant, or the
application thereof in any circumstances, is held invalid, illegal or unenforceable, the validity, legality and enforceability
of any such provisions in every other respect and of the remaining provisions contained herein and therein shall not be affected
or impaired thereby. Furthermore, subject to the preceding sentence, in lieu of any such invalid, illegal or unenforceable provision,
the parties hereto intend that there shall be added as a part of this Warrant a provision as similar in terms and commercial effect
to such invalid, illegal or unenforceable provision as may be possible and be valid and enforceable.

 

[Signature
Page Follows]

 

    10 

     

    

 

IN
WITNESS WHEREOF, this Warrant has been duly executed by the Company as of the 8th day of December, 2016.

  

	 	A.M. CASTLE
    & CO.
	 	 	 
	 	By: 	 

 

	 	Print Name: 	 

 

	 	Title: 	 

 

	[Holder]	 
	 	 	 
	By: 	 	 

		Name:	

		Title:	

 

     

    	 

    

 

EXHIBIT
A

 

EXERCISE
FORM 

 

(To
be executed upon exercise of Warrant)

 

The undersigned
hereby irrevocably elects to exercise the right, represented by the Warrant, to purchase Warrant Shares and herewith tenders payment
for _______ of the Warrant Shares to the order of A.M. Castle & Co. in the amount of $_________ in accordance with the terms
of the Warrant Agreement and this Warrant:

 

The undersigned
requests that [a statement representing] the Warrant Shares be delivered as follows:

  

	Name 	 	 

	Address 	 	 

	 	 
	Delivery Address (if different)	 
	 	 
	 	 

 

If said number
of shares shall not be all the shares purchasable under the within Warrant, the undersigned requests that a new Warrant representing
the balance of such Warrants shall be registered, with the appropriate Warrant delivered as follows:

 

	Name 	 	 

	Address 	 	 

	 	 
	Delivery Address (if different)	 
	 	 
	 	 

  

_______________________________
Signature ________________________

Social Security
or Other Taxpayer

 

Identification
Number of Holder

 

    12 

    	 

    

 

EXHIBIT
B

 

FORM
OF ASSIGNMENT

(To
be executed only upon assignment of Warrant)

 

For value
received, ______________________________ hereby sells, assigns and transfers unto the Assignee(s) named below the rights represented
by such Warrant to purchase number of Warrant Shares listed opposite the respective name(s) of the Assignee(s) named below and
all other rights of the Holder under the within Warrant, and does hereby irrevocably constitute and appoint _____________________________
attorney, to transfer said Warrant on the books of the within-named Company with respect to the number of Warrant Shares set forth
below, with full power of substitution in the premises:

 

	Name(s)
        of

        

        Assignee(s)

        
	 	Address	 	No.
    of Warrant Shares
	 	 	 	 	 
	 	 	 	 	 
	 	 	 	 	 

 

And if said
number of Warrant Shares shall not be all the Warrant Shares represented by the Warrant, a new Warrant is to be issued in the
name of said undersigned for the balance remaining of the Warrant Shares registered by said Warrant.

 

Dated: , 20__
Signature ______________________________

	 	Note:	The above
    signature should correspond exactly with the name on the face of this Warrant

 

    13A.M. CASTLE & CO. - 8-K

Exhibit 4.2

 

THIRD
SUPPLEMENTAL INDENTURE

 

This
Third Supplemental Indenture (this “Supplemental Indenture”) is made and entered into as of this 8th day of
December, 2016, by and among A.M. Castle & Co., a Maryland corporation (the “Company”), the Guarantors
party thereto (as defined in the Indenture (as defined below)) and U.S. Bank National Association, as trustee under the Indenture
(the “Trustee”).

 

RECITALS

 

A.          WHEREAS,
the Company, the Guarantors and the Trustee entered into that certain Indenture dated as of February 8, 2016, as amended by that
First Supplemental Indenture dated as of May 16, 2016 and that Second Supplemental Indenture dated as of June 9, 2016 (collectively,
the “Indenture”), governing the 12.75% Senior Secured Notes due 2018 (the “Notes”) issued
by the Company to the Holders.

 

B.          WHEREAS,
Section 9.02 of the Indenture provides that, other than certain amendments or waivers as provided therein, the Company, the Guarantors
and the Trustee may amend or supplement the Indenture, the Notes or the Guarantees with the consent of the Holders of at least
a majority in aggregate principal amount of the Notes then outstanding and eligible to vote thereon in compliance with Section
2.09 of the Indenture (collectively, the “Requisite Consent”).

 

C.          WHEREAS,
the Company desires and has requested the Trustee to join it and the Guarantors in entering into this Supplemental Indenture for
the purposes of amending certain provisions of the Indenture and the Notes as permitted by Section 9.02 of the Indenture.

 

D.          WHEREAS,
this Supplemental Indenture has been duly authorized by all necessary corporate or other action, as applicable, on the part of
each of the Company and the Guarantors, and the Company has obtained the Requisite Consent to the amendments set forth herein.

 

NOW,
THEREFORE, in consideration of the premises and for other good and valuable consideration, the receipt of which is hereby
acknowledged, the Company, the Guarantors and the Trustee mutually covenant and agree for the benefit of each other and for the
equal and ratable benefit of the Holders as follows:

 

AGREEMENT 

 

1.          Definitions.
Unless otherwise defined herein, all capitalized terms used herein have the meanings given to them in the Indenture.

 

    1 

     

    

 

2.          Amendments
to the Indenture. Effective upon the date hereof, with respect to all outstanding Notes, the following provisions of the Indenture
are hereby amended as follows:

 

(a)        The
following clause (12) is hereby added to the end of the definition of “Asset Sale” in Section 1.01 of the Indenture:

 

“(12)
the sale of substantially all the assets of Total Plastics, Inc. pursuant to that certain Asset Purchase Agreement, dated March
11, 2016, by and between Total Plastics, Inc. and Total Plastics Resources LLC.”

 

(b)        The
cross-reference to the definition of “Senior Credit Facility Availability Blocker Amount” – Section 3.09”
listed in the table contained in Section 1.02 of the Indenture is deleted in its entirety.

 

(c)
       The last two sentences of Section 3.09(a) of the Indenture are hereby deleted in their
entirety.

 

(d)
      The reference to “up to the Senior Credit Facility Designated Paydown Amount”
in subclause (ii) of the second sentence of Section 3.09(c) of the Indenture is hereby deleted in its entirety.

 

(e)        Subclause
(a) of Section 4.09(b)(1) of the Indenture is hereby deleted and replaced in its entirety with the following: “(a) the greater
of (x) $112.0 million and (y) an amount equal to 35% of the Borrowing Base as of the date of such incurrence over”.

 

3.          New
Collateral and Guarantors. The Company and the Guarantors have entered into a Senior Credit Facility with, among others, Cantor
Fitzgerald Securities, in its capacity as Senior Credit Facility Agent, dated as of December 8, 2016 (the “Refinancing
First Lien Facilities”). The Refinancing First Lien Facilities require the inclusion of certain Foreign Restricted Subsidiaries
as guarantors under the Refinancing First Lien Facilities and that such new foreign guarantors will grant and perfect a security
interest in substantially all of such foreign guarantors’ assets. Upon the inclusion of such Foreign Restricted Subsidiaries
as guarantors and the granting and perfecting of such security interests to the Senior Credit Facility Agent under the Refinancing
First Lien Facilities, the Company agrees to cause the inclusion of such Foreign Restricted Subsidiaries as Guarantors under the
Indenture and the entry into, and granting and perfecting of such security interests in the assets of the Guarantors pursuant
to, the Collateral Documents in favor of the Collateral Agent for the benefit of the secured parties named therein. In the event
that any such Foreign Restricted Subsidiary that became a Guarantor ceases to guarantee the Refinancing First Lien Facilities,
then such Guarantor will be released and relieved of any obligations under its Note Guarantee and the assets of such Guarantor
shall be released from the security interest created by the Collateral Documents.

 

4.          Indenture.
Except as amended hereby, the Indenture and the Notes are in all respects ratified and confirmed and all the terms shall remain
in full force and effect. This Supplemental Indenture shall form a part of the Indenture for all purposes, and every Holder heretofore
or hereafter authenticated and delivered under the Indenture shall be bound hereby and all terms and conditions of both shall
be read together as though they constitute a single instrument, except that in the case of conflict the provisions of this Supplemental
Indenture shall control.

 

     

     

    

 

5.          Rights
of Trustee. In entering into this Supplemental Indenture, the Trustee shall be entitled to the benefit of every provision
of the Indenture relating to the conduct or affecting the liability of or affording protection to the Trustee, including its right
to be compensated, reimbursed and indemnified, whether or not elsewhere herein so provided. The Trustee makes no representations
and shall not be responsible in any manner whatsoever as to the validity or sufficiency of this Supplemental Indenture or for
or in respect of the recitals contained herein, or with respect to the consents of the Holders or any documents used in the solicitations
of such consents, all of which recitals are made solely by the Company and the Guarantors.

 

6.          Reference
to Indenture. On and after the date hereof, each reference in the Indenture, and in all other agreements, documents, certificates,
exhibits and instruments executed pursuant thereto, to “the Indenture,” “hereunder,” “hereof,”
“herein” or words of like import referring to the Indenture shall mean and be a reference to the Indenture as amended
by this Supplemental Indenture.

 

7.          Counterparts.
This Supplemental Indenture may be executed in any number of counterparts, each of which when so executed shall be deemed to be
an original but all such counterparts shall together constitute but one and the same instrument. The exchange of copies of this
Supplemental Indenture and of signature pages by facsimile or PDF transmission shall constitute effective execution and delivery
of this Supplemental Indenture as to the parties hereto and may be used in lieu of the original Supplemental Indenture for all
purposes. Signatures of the parties hereto transmitted by facsimile or PDF shall be deemed to be their original signatures for
all purposes.

 

8.          Governing
Law. This Supplemental Indenture shall be governed by, and construed in accordance with, the laws of the State of New York,
without regard to its choice of law provisions.

 

[signature
pages follow]

 

     

     

    

 

IN
WITNESS WHEREOF, each of the parties hereto has caused this Supplemental Indenture to be executed by its duly authorized officers
as of the date first written above.

	 	 	 
	 	A.M.
    CASTLE & CO.
	 	 	 
	 	By:	/s/
    Patrick R. Anderson
	 		Name:  Patrick
    R. Anderson
	 		Title:  Chief
    Financial Officer

 

Signature
Page to Third Supplemental Indenture

 

     

     

    

 

	 	TOTAL
    PLASTICS, INC.
	 	 	 
	 	By:	/s/
    Patrick R. Anderson
	 		Name:  Patrick
    R. Anderson
	 		Title:  Vice
    President and Treasurer
	 	 	 
	 	KEYSTONE
    TUBE COMPANY, LLC
	 	 
	 	By:	/s/
    Patrick R. Anderson
	 		Name:  Patrick
    R. Anderson
	 		Title:  Treasurer

 

Signature
Page to Third Supplemental Indenture

 

     

     

    

 

	 	U.S.
    BANK NATIONAL ASSOCIATION, as Trustee
	 	 
	 	By:
    /s/ Raymond S. Haverstock
	 	Name:
    Raymond S. Haverstock
	 	Title:
    Vice President

 

Signature
Page to Third Supplemental Indenture

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