Document:

EX-4.2

 Exhibit 4.2 

FORM OF REGISTRATION RIGHTS AGREEMENT 

This Registration Rights Agreement (this “Agreement”), dated as of
                , 2018, is made and entered into by and between IPSCO Tubulars Inc., a Delaware corporation (the “Company”), and PAO TMK, a
company organized under the laws of the Russian Federation (the “Initial Holder” and, together with the Company, the “Parties”). 

WHEREAS, in connection with, and in consideration of, the transactions contemplated by the Company’s Registration Statement on Form S-1 (File No. 333-                ), the Initial Holder has requested, and the
Company has agreed to provide, registration rights with respect to the Registrable Securities (as hereinafter defined) as set forth in this Agreement. 

NOW THEREFORE, in consideration of the mutual covenants and agreements set forth herein and for good and valuable consideration, the receipt
and sufficiency of which is hereby acknowledged by each party hereto, the Parties hereby agree as follows: 
 1. Definitions.
As used in this Agreement, the following terms have the meanings indicated: 
 “Affiliate” of any specified Person
means any other person which, directly or indirectly, is in control of, is controlled by, or is under common control with, such specified Person. For purposes of this definition, “control” of a Person means the power, direct or indirect,
to direct or cause the direction of the management and policies of such Person, whether through ownership of voting securities, by contract or otherwise; and the terms “controlling” and “controlled” have meanings correlative to
the foregoing. For the avoidance of doubt, for purposes of this Agreement, the Company and the Initial Holder shall not be considered Affiliates of each other. 

“Agreement” has the meaning set forth in the preamble. 

“Automatic Shelf Registration Statement” means an “automatic shelf registration statement” as defined under
Rule 405. 
 “Blackout Period” has the meaning set forth in Section 3(o). 

“Board” means the board of directors of the Company. 

“Business Day” means any day other than a Saturday, Sunday, any federal holiday or any other day on which banking
institutions in the State of Texas or the State of New York are authorized or required to be closed by law or governmental action. 

“Commission” means the Securities and Exchange Commission or any other federal agency then administering the
Securities Act or Exchange Act. 
 “Common Stock” means the common stock, par value $0.01 per share, of the Company.

 “Company” has the meaning set forth in the preamble. 

“Company Securities” means any equity interest of any class or series in the Company. 

“Demand Notice” has the meaning set forth in Section 2(a)(i). 

“Demand Registration” has the meaning set forth in Section 2(a)(i). 

“Effective Date” means the time and date that a Registration Statement is first declared effective by the Commission
or otherwise becomes effective. 
 “Effectiveness Period” has the meaning set forth in
Section 2(a)(ii). 

 “Exchange Act” means the Securities Exchange Act of 1934, as amended from
time to time, and the rules and regulations of the Commission promulgated thereunder. 
 “Holder” means
(i) the Initial Holder unless and until the Initial Holder ceases to hold any Registrable Securities and (ii) any holder of Registrable Securities to whom registration rights conferred by this Agreement have been transferred in compliance
with Section 8(e) hereof; provided that any Person referenced in clause (ii) shall be a Holder only if such Person agrees in writing to be bound by and subject to the terms set forth in this Agreement.

 “Holder Indemnified Persons” has the meaning set forth in Section 6(a). 

“Initial Holder” has the meaning set forth in the preamble. 

“Initiating Holder” means the Sponsoring Holder delivering the Demand Notice or the Underwritten Offering Notice, as
applicable. 
 “Lock-Up Period” has the meaning set forth in the
underwriting agreement entered into by the Company in connection with the initial underwritten public offering of shares of Common Stock. 

“Losses” has the meaning set forth in Section 6(a). 

“Material Adverse Change” means (i) any general suspension of trading in, or limitation on prices for, securities
on any national securities exchange or in the over-the-counter market in the United States; (ii) the declaration of a banking moratorium or any suspension of
payments in respect of banks in the United States; (iii) a material outbreak or escalation of armed hostilities or other international or national calamity involving the United States or the declaration by the United States of a national
emergency or war or a change in national or international financial, political or economic conditions; or (iv) any event, change, circumstance or effect that is or is reasonably likely to be materially adverse to the business, properties,
assets, liabilities, condition (financial or otherwise), operations, results of operations or prospects of the Company and its subsidiaries taken as a whole. 

“Minimum Amount” has the meaning set forth in Section 2(a)(i). 

“Parties” has the meaning set forth in the preamble. 

“Person” means an individual, corporation, partnership, trust, incorporated or unincorporated association, joint
venture, limited liability company, joint stock company, estate, trust, government (or an agency or subdivision thereof) or other entity of any kind. 

“Piggyback Registration” has the meaning set forth in Section 2(c)(i). 

“Piggyback Registration Notice” has the meaning set forth in Section 2(c)(i). 

“Piggyback Registration Request” has the meaning set forth in Section 2(c)(i). 

“Proceeding” means any action, claim, suit, proceeding or investigation (including a preliminary investigation or
partial proceeding, such as a deposition) pending or, to the knowledge of the Company, to be threatened. 

“Prospectus” means the prospectus included in a Registration Statement (including a prospectus that includes any
information previously omitted from a prospectus filed as part of an effective Registration Statement in reliance upon Rule 430A, Rule 430B or Rule 430C promulgated under the Securities Act), as amended or supplemented by any
prospectus supplement, with respect to the terms of the offering of any portion of the Registrable Securities covered by such Registration Statement and all other amendments and supplements to the Prospectus, including post-effective amendments, and
all material incorporated by reference or deemed to be incorporated by reference in such Prospectus. 

  
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 “Registrable Securities” means the Shares; provided,
however, that Registrable Securities shall not include: (i) any Shares that have been registered under the Securities Act and disposed of pursuant to an effective Registration Statement or otherwise transferred to a Person who is not
entitled to the registration and other rights hereunder; (ii) any Shares that have been sold or transferred by the Holder thereof pursuant to Rule 144 (or any similar provision then in force under the Securities Act) and the transferee
thereof does not receive “restricted securities” as defined in Rule 144; and (iii) any Shares that cease to be outstanding (whether as a result of repurchase and cancellation, conversion or otherwise). 

“Registration Expenses” has the meaning set forth in Section 5. 

“Registration Statement” means a registration statement of the Company in the form required to register under the
Securities Act and other applicable law the resale of the Registrable Securities in accordance with the intended plan of distribution of each Holder of Registrable Securities included therein, and including any Prospectus, amendments and supplements
to each such registration statement or Prospectus, including pre- and post-effective amendments, all exhibits thereto, and all material incorporated by reference or deemed to be incorporated by reference in
such registration statement. 
 “Requested Underwritten Offering” has the meaning set forth in
Section 2(b). 
 “Rule 144” means Rule 144
promulgated by the Commission pursuant to the Securities Act. 
 “Rule 405” means
Rule 405 promulgated by the Commission pursuant to the Securities Act. 

“Rule 415” means Rule 415 promulgated by the Commission pursuant to the
Securities Act. 
 “Rule 424” means Rule 424 promulgated by the Commission
pursuant to the Securities Act. 
 “Securities Act” means the Securities Act of 1933, as amended. 

“Selling Expenses” means all underwriting discounts, selling commissions and stock transfer taxes applicable to the
sale of Registrable Securities and fees and disbursements of counsel for any Holder (except as set forth in Section 5). 

“Shares” means (i) the shares of Common Stock held by the Holders as of the date hereof and (ii) any other
equity interests of the Company or equity interests in any successor of the Company issued in respect of such shares by reason of or in connection with any stock dividend, stock split, combination, reorganization, recapitalization, conversion to
another type of entity or similar event involving a change in the capital structure of the Company. 
 “Shelf Registration
Statement” means a Registration Statement of the Company filed with the Commission on Form S-3 (or any successor form or other appropriate form under the Securities Act) for an offering to be
made on a continuous or delayed basis pursuant to Rule 415 (or any similar rule that may be adopted by the Commission) covering the Registrable Securities, as applicable. 

“Sponsoring Holders” means (i) the Initial Holder and (ii) any holder of Registrable Securities to whom
rights of a “Sponsoring Holder” conferred by this Agreement have been transferred in compliance with Section 8(e) hereof; provided that any Person referenced in clause (ii) shall be a
Sponsoring Holder only if such Person agrees in writing to be bound by and subject to the terms set forth in this Agreement. 

“Suspension Period” has the meaning set forth in Section 8(b). 

“Trading Market” means the principal national securities exchange on which Registrable Securities are listed. 

“Underwritten Offering” means an underwritten offering of Common Stock for cash (whether a Requested Underwritten
Offering or in connection with a public offering of Common Stock by the Company, stockholders or both), excluding an offering relating solely to an employee benefit plan, an offering relating to a transaction on
Form S-4 or S-8 or an offering on any registration statement form that does not permit secondary sales. 

  
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 “Underwritten Offering Notice” has the meaning set forth in
Section 2(b). 
 “Underwritten Offering Piggyback Notice” has the meaning set forth in
Section 2(c)(ii). 
 “Underwritten Offering Piggyback Request” has the meaning set forth
in Section 2(c)(ii). 
 “Underwritten Piggyback Offering” has the meaning set forth in
Section 2(c)(ii). 
 “VWAP” means, as of a specified date and in respect of Registrable
Securities, the volume weighted average price for such security on the Trading Market for the five trading days immediately preceding, but excluding, such date. 

“WKSI” means a “well known seasoned issuer” as defined under Rule 405. 

Unless the context requires otherwise: (a) any pronoun used in this Agreement shall include the corresponding masculine, feminine or
neuter forms; (b) references to Sections refer to Sections of this Agreement; (c) the terms “include,” “includes,” “including” and words of like import shall be deemed to be followed by the words “without
limitation”; (d) the terms “hereof,” “hereto,” “herein” or “hereunder” refer to this Agreement as a whole and not to any particular provision of this Agreement; (e) unless the context otherwise
requires, the term “or” is not exclusive and shall have the inclusive meaning of “and/or”; (f) defined terms herein will apply equally to both the singular and plural forms and derivative forms of defined terms will have
correlative meanings; (g) references to any law or statute shall include all rules and regulations promulgated thereunder, and references to any law or statute shall be construed as including any legal and statutory provisions
consolidating, amending, succeeding or replacing the applicable law or statute; (h) references to any Person include such Person’s successors and permitted assigns; and (i) references to “days” are to calendar days unless
otherwise indicated. 
 2. Registration. 

(a) Demand Registration. 

(i) At any time after the expiration of the Lock-Up Period, any Sponsoring Holder shall have the
option and right, exercisable by delivering a written notice to the Company (a “Demand Notice”), to require the Company to, pursuant to the terms of and subject to the limitations contained in this Agreement, prepare and file
with the Commission a Registration Statement registering the offering and sale of the number and type of Registrable Securities on the terms and conditions specified in the Demand Notice, which may include sales on a delayed or continuous basis
pursuant to Rule 415 pursuant to a Shelf Registration Statement (a “Demand Registration”). The Demand Notice must set forth the number of Registrable Securities that the Initiating Holder intends to include in such
Demand Registration and the intended methods of disposition thereof. Notwithstanding anything to the contrary herein, in no event shall the Company be required to effectuate a Demand Registration unless the Registrable Securities of the Sponsoring
Holder and its Affiliates to be included therein have an aggregate value, based on the VWAP as of the date of the Demand Notice, of at least $50 million (the “Minimum Amount”). 

(ii) Within thirty Business Days after the receipt of the Demand Notice (except if the Company is not then eligible to register for resale the
Registrable Securities on Form S-3, in which case, within ninety days thereof), the Company shall, subject to the limitations of this Section 2(a), file a Registration Statement
in accordance with the terms and conditions of the Demand Notice. The Company shall use all commercially reasonable efforts to cause such Registration Statement to become and remain effective under the Securities Act until the earlier of
(A) 180 days (or two years if a Shelf Registration Statement is requested) after the Effective Date and (B) the date on which all Registrable Securities covered by such Registration Statement have been sold (the “Effectiveness
Period”). 

  
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 (iii) Subject to the other limitations contained in this Agreement, the Company is not obligated
hereunder to effect (A) a Demand Registration within 90 days after the closing of any Underwritten Offering, or (B) a subsequent Demand Registration pursuant to a Demand Notice if a Registration Statement covering all of the Registrable
Securities held by the Initiating Holder shall have become and remains effective under the Securities Act and is sufficient to permit offers and sales of the number and type of Registrable Securities on the terms and conditions specified in the
Demand Notice in accordance with the intended timing and method or methods of distribution thereof specified in the Demand Notice. No Demand Registration shall be deemed to have occurred for purposes of this
Section 2(a)(iii) if the Registration Statement relating thereto does not become effective or is not maintained effective for its entire Effectiveness Period, in which case the Initiating Holder shall be entitled to an
additional Demand Registration in lieu thereof. 
 (iv) A Holder may withdraw all or any portion of its Registrable Securities included in a
Demand Registration from such Demand Registration at any time prior to the effectiveness of the applicable Registration Statement. Upon receipt of a notice from the Initiating Holder that the Initiating Holder is withdrawing all of its Registrable
Securities from the Demand Registration or a notice from a Holder to the effect that the Holder is withdrawing an amount of its Registrable Shares such that the remaining amount of Registrable Shares to be included in the Demand Registration is
below the Minimum Amount, the Company shall cease all efforts to secure effectiveness of the applicable Registration Statement. Such registration nonetheless shall be deemed a Demand Registration with respect to the Initiating Holder for purposes of
Section 2(a)(iii) unless (A) the Initiating Holder shall have paid or reimbursed the Company for its pro rata share of all reasonable and documented
out-of-pocket fees and expenses incurred by the Company in connection with the withdrawn registration of such Registrable Securities (based on the number of securities
the Initiating Holder sought to register, as compared to the total number of securities included in such Demand Registration) or (B) the withdrawal is made following the occurrence of a Material Adverse Change or pursuant to the Company’s
request for suspension pursuant to Section 3(o). 
 (v) The Company may include in any such Demand Registration
other Company Securities for sale for its own account or for the account of any other Person, subject to Section 3(c)(iii). 

(vi) Subject to the limitations contained in this Agreement, the Company shall effect any Demand Registration on such appropriate registration
form of the Commission (A) as shall be selected by the Company and (B) as shall permit the disposition of the Registrable Securities in accordance with the intended method or methods of disposition specified in the Demand Notice;
provided that if the Company becomes, and is at the time of its receipt of a Demand Notice, a WKSI, the Demand Registration for any offering and selling of Registrable Securities shall be effected pursuant to an Automatic Shelf Registration
Statement, which shall be on Form S-3 or any equivalent or successor form under the Securities Act (if available to the Company). If at any time a Registration Statement on
Form S-3 is effective and a Holder provides written notice to the Company that it intends to effect an offering of all or part of the Registrable Securities included on such Registration Statement, the
Company will amend or supplement such Registration Statement as may be necessary in order to enable such offering to take place. 
 (vii)
Without limiting Section 3, in connection with any Demand Registration pursuant to and in accordance with this Section 2(a), the Company shall (A) promptly prepare and file or cause to be
prepared and filed (1) such additional forms, amendments, supplements, prospectuses, certificates, letters, opinions and other documents, as may be necessary or advisable to register or qualify the securities subject to such Demand
Registration, including under the securities laws of such jurisdictions as the Holders shall reasonably request; provided, however, that no such qualification shall be required in any jurisdiction where, as a result thereof, the
Company would become subject to general service of process or to taxation or qualification to do business in such jurisdiction solely as a result of registration and (2) such forms, amendments, supplements, prospectuses, certificates, letters,
opinions and other documents as may be necessary to apply for listing or to list the Registrable Securities subject to such Demand Registration on the Trading Market and (B) do any and all other acts and things that may be reasonably necessary
or appropriate or reasonably requested by the Holders to enable the Holders to consummate a public sale of such Registrable Securities in accordance with the intended timing and method or methods of distribution thereof. 

  
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 (viii) In the event a Holder transfers Registrable Securities included on a Registration
Statement and such Registrable Securities remain Registrable Securities following such transfer, at the request of such Holder, the Company shall amend or supplement such Registration Statement as may be necessary in order to enable such transferee
to offer and sell such Registrable Securities pursuant to such Registration Statement; provided that in no event shall the Company be required to file a post-effective amendment to the Registration Statement unless (A) such Registration
Statement includes only Registrable Securities held by the Holder, Affiliates of the Holder or transferees of the Holder or (B) the Company has received written consent therefor from a Person for whom Registrable Securities have been registered
on (but not yet sold under) such Registration Statement, other than the Holder, Affiliates of the Holder or transferees of the Holder. 
 (b)
Requested Underwritten Offering. Any Sponsoring Holder then able to effectuate a Demand Registration pursuant to the terms of Section 2(a), ignoring for purposes of such determination
Section 2(a)(iii)(B), or any Sponsoring Holder who has previously effectuated a Demand Registration pursuant to Section 2(a) but has not engaged in an Underwritten Offering in respect of such
Demand Registration, shall have the option and right, exercisable by delivering written notice to the Company of its intention to distribute Registrable Securities by means of an Underwritten Offering (an “Underwritten Offering
Notice”), to require the Company, pursuant to the terms of and subject to the limitations of this Agreement, to effectuate a distribution of any or all of its Registrable Securities by means of an Underwritten Offering pursuant to a new
Demand Registration or pursuant to an effective Registration Statement covering such Registrable Securities (a “Requested Underwritten Offering”); provided, that if the Requested Underwritten Offering is pursuant to a
new Demand Registration, then the Registrable Securities of such Initiating Holder requested to be included in such Requested Underwritten Offering have an aggregate value of at least equal to the Minimum Amount as of the date of such Underwritten
Offering Notice, and if the Requested Underwritten Offering is pursuant to an effective Demand Registration, then the Registrable Securities of such Initiating Holder requested to be included in such Requested Underwritten Offering have an aggregate
value of at least equal to 50 percent of the Minimum Amount as of the date of such Underwritten Offering Notice. The Underwritten Offering Notice must set forth the number of Registrable Securities that the Initiating Holder intends to include
in such Requested Underwritten Offering. The managing underwriter or managing underwriters of a Requested Underwritten Offering shall be designated by the Company; provided, however, that such designated managing underwriter or
managing underwriters shall be reasonably acceptable to the Initiating Holder. Notwithstanding the foregoing, the Company is not obligated to effect a Requested Underwritten Offering within 90 days after the closing of an Underwritten Offering.
Any Requested Underwritten Offering (other than the first Requested Underwritten Offering made in respect of a prior Demand Registration) shall constitute a Demand Registration of the Initiating Holder for purposes of
Section 2(a)(iii) (it being understood that if requested concurrently with a Demand Registration then, together, such Demand Registration and Requested Underwritten Offering shall count as one Demand Registration);
provided, however, that a Requested Underwritten Offering shall not constitute a Demand Registration of the Initiating Holder for purposes of Section 2(a)(iii) if, as a result of
Section 2(c)(iii)(A), the Requested Underwritten Offering includes less than the lesser of (i) Registrable Securities of the Initiating Holder having an aggregate value, based on the VWAP as of the effective date of
the related Registration Statement, of $30 million, and (ii) two-thirds of the number of Registrable Securities the Initiating Holder set forth in the applicable Underwritten Offering Notice. 

(c) Piggyback Registration and Piggyback Underwritten Offering. 

(i) If the Company shall at any time propose to file a registration statement under the Securities Act with respect to an offering of Common
Stock (other than a registration statement on Form S-4, Form S-8 or any successor forms thereto or filed solely in connection with an exchange offer or any
employee benefit or dividend reinvestment plan), whether or not for its own account, then the Company shall promptly notify all Holders of such proposal reasonably in advance of (and in any event at least five Business Days before) the anticipated
filing date (the “Piggyback Registration Notice”). The Piggyback Registration Notice shall offer Holders the opportunity to include for registration in such registration statement the number of Registrable Securities as they
may request in writing (a “Piggyback Registration”). The Company shall use commercially reasonable efforts to include in each such Piggyback Registration such Registrable Securities for which the Company has received written
requests for inclusion therein (“Piggyback Registration Request”) within three Business Days after sending the Piggyback Registration Notice; provided, however, that the Company shall not be required to
include in such Piggyback Registration a Holder’s Registrable Securities in the event such Holder, together with its Affiliates, does not request for inclusion Registrable Securities having an aggregate value, based on the VWAP as of the date
of the Piggyback Registration Notice, of at least $10 million. Each Holder shall be permitted to withdraw all or part of such Holder’s Registrable Securities from a Piggyback Registration by giving

  
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written notice to the Company of its request to withdraw; provided that (A) such request must be made in writing prior to the effectiveness of such registration statement and (B) such
withdrawal shall be irrevocable and, after making such withdrawal, a Holder shall no longer have any right to include Registrable Securities in the Piggyback Registration as to which such withdrawal was made. Any withdrawing Holder shall continue to
have the right to include any Registrable Securities in any subsequent registration statement or registration statements as may be filed by the Company with respect to offerings of Common Stock, all upon the terms and conditions set forth herein.

 (ii) If the Company shall at any time propose to conduct an Underwritten Offering, whether or not for its own account, then the Company
shall promptly notify all Holders of such proposal reasonably in advance of (and in any event at least five Business Days before or two Business Days before in connection with a “bought deal” or overnight Underwritten Offering) the
commencement of the offering, which notice shall set forth the principal terms and conditions of the issuance, including the proposed offering price (or range of offering prices), the anticipated filing date of the related registration statement (if
applicable) and the number of shares of Common Stock that are proposed to be registered (the “Underwritten Offering Piggyback Notice”). The Underwritten Offering Piggyback Notice shall offer Holders the opportunity to include
in such Underwritten Offering (and any related registration, if applicable) the number of Registrable Securities as they may request in writing (an “Underwritten Piggyback Offering”); provided, however, that in
the event that the Company proposes to effectuate the subject Underwritten Offering pursuant to an effective Shelf Registration Statement of the Company other than an Automatic Shelf Registration Statement, only Registrable Securities of Holders
which are subject to an effective Shelf Registration Statement may be included in such Underwritten Piggyback Offering. The Company shall use commercially reasonable efforts to include in each such Underwritten Piggyback Offering such Registrable
Securities for which the Company has received written requests for inclusion therein (“Underwritten Offering Piggyback Request”) within three Business Days after sending the Underwritten Offering Piggyback Notice (or one
Business Day in connection with a “bought deal” or overnight Underwritten Offering); provided, however, that the Company shall not be required to include in such Underwritten Piggyback Offering a Holder’s
Registrable Securities in the event such Holder, together with its Affiliates, does not request for inclusion Registrable Securities having an aggregate value, based on the VWAP as of the date of the Underwritten Offering Piggyback Notice, of at
least $10 million. Notwithstanding anything to the contrary in this Section 2(c)(ii), if the Underwritten Offering pursuant to this Section 2(c)(ii) is a “bought deal” or
overnight Underwritten Offering and the managing underwriter advises the Company that the giving of notice pursuant to this Section 2(c)(ii) would adversely affect the Underwritten Offering, no such notice shall be
required. Each Holder shall be permitted to withdraw all or part of such Holder’s Registrable Securities from an Underwritten Piggyback Offering at any time prior to the effectiveness of the applicable registration statement, and such
Holder shall continue to have the right to include any Registrable Securities in any subsequent Underwritten Offerings, all upon the terms and conditions set forth herein. 

(iii) If the managing underwriter or managing underwriters of an Underwritten Offering advise the Company and the Holders that in their
reasonable opinion that the inclusion of all of the Holders’ Registrable Securities requested for inclusion in the subject Underwritten Offering (and any related registration, if applicable) (and any other Common Stock proposed to be included
in such offering) exceeds the number that can be included without being likely to have a significant adverse effect on the price, timing or distribution of the securities offered or the market for the securities offered, the Company shall include in
such Underwritten Offering (and any related registration, if applicable) only that number of shares of Common Stock proposed to be included in such Underwritten Offering (and any related registration, if applicable) that, in the reasonable opinion
of the managing underwriter or managing underwriters, will not have such adverse effect, with such number to be allocated as follows: (A) in the case of a Requested Underwritten Offering, (1) first, to the Initiating Holder in full with
respect to the number of Registrable Securities such Initiating Holder requested for inclusion, (2) second, pro-rata among all Holders (other than the Initiating Holder) that have requested to include
Registrable Securities in such Underwritten Offering based on the relative number of Registrable Securities then held by each such Holder, (3) third, if there remains availability for additional shares of Common Stock to be included in such
Underwritten Offering, to the Company, and (4) fourth, if there remains availability for additional shares of Common Stock to be included in such Underwritten Offering, to any other holders entitled to participate in such Underwritten Offering,
if applicable, based on the relative number of shares of Common Stock then held by each such holder; and (B) in the case of any other Underwritten Offerings, (x) first, to the Company, (y) second, if there remains availability for
additional shares of Common Stock to be included in such Underwritten Offering, pro-rata among all Holders desiring to include Registrable Securities in such Underwritten Offering based on the relative

  
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number of Registrable Securities then held by each such Holder, and (z) third, if there remains availability for additional shares of Common Stock to be included in such registration, pro-rata among any other holders entitled to participate in such Underwritten Offering, if applicable, based on the relative number of Common Stock then held by each such holder. If any Holder disapproves of the
terms of any such Underwritten Offering, such Holder may elect to withdraw therefrom by written notice to the Company and the managing underwriter(s) delivered on or prior to the time of the commencement of such offering. Any Registrable
Securities withdrawn from such underwriting shall be excluded and withdrawn from the registration. 
 (iv) The Company shall have the right
to terminate or withdraw any registration initiated by it under this Section 2(c) at any time in its sole discretion whether or not any Holder has elected to include Registrable Securities in such Registration
Statement. The Registration Expenses of such withdrawn registration shall be borne by the Company in accordance with Section 5 hereof. 

3. Registration and Underwritten Offering Procedures. 

The procedures to be followed by the Company and each Holder electing to sell Registrable Securities in a Registration Statement pursuant to
this Agreement, and the respective rights and obligations of the Company and such Holders, with respect to the preparation, filing and effectiveness of such Registration Statement and the effectuation of any Underwritten Offering, are as follows:

 (a) In connection with a Demand Registration, the Company will, at least three Business Days prior to the anticipated filing of the
Registration Statement and any related Prospectus or any amendment or supplement thereto (other than, after effectiveness of the Registration Statement, any filing made under the Exchange Act that is incorporated by reference into the Registration
Statement), (i) furnish to such Holders copies of all such documents prior to filing and (ii) use commercially reasonable efforts to address in each such document when so filed with the Commission such comments as such Holders reasonably
shall propose prior to the filing thereof. 
 (b) In connection with a Piggyback Registration, Underwritten Piggyback Offering or a Requested
Underwritten Offering, the Company will, at least three Business Days (or in the case of a Shelf Registration Statement or an offering that will be made pursuant to a Shelf Registration Statement, at least one Business Day) prior to the anticipated
filing of any initial Registration Statement that identifies the Holders and any related Prospectus or any amendment or supplement thereto (other than amendments and supplements that do not materially alter the previous disclosure or do nothing more
than name Holders and provide information with respect thereto), as applicable, (i) furnish to such Holders copies of any such Registration Statement or related Prospectus or amendment or supplement thereto that identify the Holders and any
related Prospectus or any amendment or supplement thereto (other than amendments and supplements that do not materially alter the previous disclosure or do nothing more than name Holders and provide information with respect thereto) prior to filing
and (ii) use commercially reasonable efforts to address in each such document when so filed with the Commission such comments as such Holders reasonably shall propose prior to the filing thereof. 

(c) The Company will use commercially reasonable efforts to as promptly as reasonably practicable (i) prepare and file with the Commission
such amendments, including post-effective amendments, and supplements to each Registration Statement and the Prospectus used in connection therewith as may be necessary under applicable law to keep such Registration Statement continuously effective
with respect to the disposition of all Registrable Securities covered thereby for its Effectiveness Period and, subject to the limitations contained in this Agreement, prepare and file with the Commission such additional Registration Statements in
order to register for resale under the Securities Act all of the Registrable Securities held by the Holders; (ii) cause the related Prospectus to be amended or supplemented by any required prospectus supplement, and as so supplemented or
amended to be filed pursuant to Rule 424; and (iii) respond to any comments received from the Commission with respect to each Registration Statement or any amendment thereto and, as promptly as reasonably practicable provide such Holders
true and complete copies of all correspondence from and to the Commission relating to such Registration Statement that pertains to such Holders as selling stockholders but not any comments that would result in the disclosure to such Holders of
material and non-public information concerning the Company. 

  
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 (d) The Company will comply in all material respects with the provisions of the Securities Act
and the Exchange Act with respect to the Registration Statements and the disposition of all Registrable Securities covered by each Registration Statement. 

(e) The Company will notify such Holders who are included in a Registration Statement as promptly as reasonably practicable:
(i) (A) when a Prospectus or any prospectus supplement or post-effective amendment to a Registration Statement in which such Holder is included has been filed; (B) when the Commission notifies the Company whether there will be a
“review” of the applicable Registration Statement and whenever the Commission comments in writing on such Registration Statement (in which case the Company shall provide true and complete copies thereof and all written responses thereto to
each of such Holders that pertain to such Holders as selling stockholders); and (C) with respect to each applicable Registration Statement or any post-effective amendment thereto, when the same has been declared effective; (ii) of any
request by the Commission or any other federal or state governmental authority for amendments or supplements to such Registration Statement or Prospectus or for additional information that pertains to such Holders as sellers of Registrable
Securities; (iii) of the issuance by the Commission of any stop order suspending the effectiveness of such Registration Statement covering any or all of the Registrable Securities or the initiation of any Proceedings for that purpose;
(iv) of the receipt by the Company of any notification with respect to the suspension of the qualification or exemption from qualification of any of the Registrable Securities for sale in any jurisdiction, or the initiation or threatening of
any Proceeding for such purpose; and (v) of the occurrence of any event or passage of time that makes any statement made in such Registration Statement or Prospectus or any document incorporated or deemed to be incorporated therein by reference
untrue in any material respect or that requires any revisions to such Registration Statement, Prospectus or other documents so that, in the case of such Registration Statement or the Prospectus, as the case may be, it will not contain any untrue
statement of a material fact or omit to state any material fact required to be stated therein or necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading (provided, however,
that no notice by the Company shall be required pursuant to this clause (v) in the event that the Company either promptly files a prospectus supplement to update the Prospectus or a Form 8-K or
other appropriate Exchange Act report that is incorporated by reference into the Registration Statement, which in either case, contains the requisite information that results in such Registration Statement no longer containing any untrue statement
of material fact or omitting to state a material fact necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading). 

(f) The Company will use commercially reasonable efforts to avoid the issuance of or, if issued, obtain the withdrawal of (i) any order
suspending the effectiveness of a Registration Statement, or (ii) any suspension of the qualification (or exemption from qualification) of any of the Registrable Securities for sale in any jurisdiction, as promptly as reasonably practicable, or
if any such order or suspension is made effective during any Blackout Period or Suspension Period, as promptly as reasonably practicable after such Blackout Period or Suspension Period is over. 

(g) During the Effectiveness Period, the Company will furnish to each such Holder, without charge, at least one conformed copy of each
Registration Statement and each amendment thereto and all exhibits to the extent requested by such Holder (including those incorporated by reference) promptly after the filing of such documents with the Commission; provided, that the Company
will not have any obligation to provide any document pursuant to this clause that is available on the Commission’s EDGAR system. 
 (h)
The Company will promptly deliver to each Holder, without charge, as many copies of each Prospectus or Prospectuses (including each form of prospectus) authorized by the Company for use and each amendment or supplement thereto as such Holder may
reasonably request during the Effectiveness Period. Subject to the terms of this Agreement, including Section 8(b), the Company consents to the use of such Prospectus and each amendment or supplement thereto by each of the
selling Holders in connection with the offering and sale of the Registrable Securities covered by such Prospectus and any amendment or supplement thereto. 

(i) The Company will cooperate with such Holders to facilitate the timely preparation and delivery of certificates representing Registrable
Securities to be delivered to a transferee pursuant to a Registration Statement, which certificates shall be free of all restrictive legends indicating that the Registrable Securities are unregistered or unqualified for resale under the Securities
Act, Exchange Act or other applicable securities laws, and to enable such Registrable Securities to be in such denominations and registered in such names as any such Holder 

  
 9 

 
may request in writing. In connection therewith, if required by the Company’s transfer agent, the Company will promptly, after the Effective Date of the Registration Statement, cause an
opinion of counsel as to the effectiveness of the Registration Statement to be delivered to and maintained with its transfer agent, together with any other authorizations, certificates and directions required by the transfer agent which authorize
and direct the transfer agent to issue such Registrable Securities without any such legend upon sale by the Holder of such Registrable Securities under the Registration Statement. 

(j) Upon the occurrence of any event contemplated by Section 3(e)(v), as promptly as reasonably practicable, the
Company will prepare a supplement or amendment, including a post-effective amendment, if required by applicable law, to the affected Registration Statement or a supplement to the related Prospectus or any document incorporated or deemed to be
incorporated therein by reference, and file any other required document so that, as thereafter delivered, no Registration Statement nor any Prospectus will contain an untrue statement of a material fact or omit to state a material fact required to
be stated therein or necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading. 

(k) With respect to Underwritten Offerings, (i) the right of any Holder to include such Holder’s Registrable Securities in an
Underwritten Offering shall be conditioned upon such Holder’s participation in such underwriting and the inclusion of such Holder’s Registrable Securities in the underwriting to the extent provided herein, (ii) each Holder
participating in such Underwritten Offering agrees to enter into an underwriting agreement in customary form and sell such Holder’s Registrable Securities on the basis provided in any underwriting arrangements approved by the Persons entitled
to select the managing underwriter or managing underwriters hereunder and (iii) each Holder participating in such Underwritten Offering agrees to complete and execute all questionnaires, powers of attorney, indemnities, underwriting agreements
and other documents customarily and reasonably required under the terms of such underwriting arrangements. The Company hereby agrees with each Holder that, in connection with any Underwritten Offering in accordance with the terms hereof, it will
negotiate in good faith and execute all indemnities, underwriting agreements and other documents reasonably required under the terms of such underwriting arrangements, including using all commercially reasonable efforts to procure customary legal
opinions and auditor “comfort” letters. 
 (l) For a reasonable period prior to the filing of any Registration Statement and
throughout the Effectiveness Period, the Company will make available, upon reasonable notice at the Company’s principal place of business or such other reasonable place, for inspection during normal business hours by a representative or
representatives of the selling Holders, the managing underwriter or managing underwriters and any attorneys or accountants retained by such selling Holders or underwriters, all such financial and other information and books and records of the
Company, and cause the officers, employees, counsel and independent certified public accountants of the Company to respond to such inquiries, as shall be reasonably necessary (and in the case of counsel, not violate an attorney-client privilege in
such counsel’s reasonable belief) to conduct a reasonable investigation within the meaning of Section 11 of the Securities Act; provided, however, that any information that is not generally publicly available at the time of
delivery of such information shall be kept confidential by such Persons unless disclosure of such information is required by court or administrative order or, in the opinion of counsel to such Person, law, in which case, such Person shall be
required to give the Company written notice of the proposed disclosure prior to such disclosure and, if requested by the Company, assist the Company in seeking to prevent or limit the proposed disclosure. 

(m) In connection with any Requested Underwritten Offering, the Company will use commercially reasonable efforts to cause appropriate officers
and employees to be available, on a customary basis and upon reasonable notice, to meet with prospective investors in presentations, meetings and road shows. 

(n) Each Holder agrees to furnish to the Company any other information regarding the Holder and the distribution of such securities as the
Company reasonably determines is required to be included in any Registration Statement or any Prospectus or prospectus supplement relating to an Underwritten Offering. 

(o) Notwithstanding any other provision of this Agreement, the Company shall not be required to file a Registration Statement (or any amendment
thereto) or effect a Requested Underwritten Offering (or, if the Company has filed a Shelf Registration Statement and has included Registrable Securities therein, the Company shall be entitled to suspend the offer and sale of Registrable Securities
pursuant to such Registration 

  
 10 

 
Statement) for a period of up to 60 days if (i) the Board determines that a postponement is in the best interest of the Company and its stockholders generally due to a pending transaction
involving the Company (including a pending securities offering by the Company), (ii) the Board determines such registration would render the Company unable to comply with applicable securities laws or (iii) the Board determines such
registration would require disclosure of material information that the Company has a bona fide business purpose for preserving as confidential (any such period, a “Blackout Period”). Notwithstanding anything to the
contrary in this Agreement, in no event shall any Blackout Periods and any Suspension Periods continue for more than 120 days in the aggregate during any 12-month period. 

(p) In connection with an Underwritten Offering, the Company shall use all commercially reasonable efforts to provide to each Holder named as a
selling securityholder in any Registration Statement a copy of any auditor “comfort” letters and customary legal opinions, in each case that have been provided to the managing underwriter or managing underwriters in connection with the
Underwritten Offering, not later than the Business Day prior to the effective date of such Registration Statement. 
 4. No
Inconsistent Agreements; Additional Rights. The Company shall not hereafter enter into, and is not currently a party to, any agreement with respect to its securities that is inconsistent in any material respect with, or superior to, the
rights granted to the Holders by this Agreement. 
 5. Registration Expenses. All Registration Expenses incident to the
Parties’ performance of or compliance with their respective obligations under this Agreement or otherwise in connection with any Demand Registration, Requested Underwritten Offering, Piggyback Registration or Underwritten Piggyback Offering (in
each case, excluding any Selling Expenses) shall be borne by the Company, whether or not any Registrable Securities are sold pursuant to a Registration Statement. “Registration Expenses” shall include, without limitation,
(i) all registration and filing fees (including fees and expenses (A) with respect to filings required to be made with the Trading Market and (B) in compliance with applicable state securities or “Blue Sky” laws),
(ii) printing expenses (including expenses of printing certificates for Company Securities and of printing Prospectuses if the printing of Prospectuses is reasonably requested by a Holder of Registrable Securities included in the Registration
Statement), (iii) messenger, telephone and delivery expenses, (iv) fees and disbursements of counsel, auditors, accountants and independent petroleum engineers for the Company, (v) Securities Act liability insurance, if the Company so
desires such insurance, (vi) fees and expenses of all other Persons retained by the Company in connection with the consummation of the transactions contemplated by this Agreement and (vii) all expenses relating to marketing the sale of the
Registrable Securities, including expenses related to conducting a “road show.” In addition, the Company shall be responsible for all of its expenses incurred in connection with the consummation of the transactions contemplated by this
Agreement (including expenses payable to third parties and including all salaries and expenses of their officers and employees performing legal or accounting duties), the expense of any annual audit and the fees and expenses incurred in connection
with the listing of the Registrable Securities on the Trading Market. 
 6. Indemnification. 

(a) The Company shall indemnify and hold harmless each Holder, its Affiliates and each of their respective officers and directors and any agent
thereof (collectively, “Holder Indemnified Persons”), to the fullest extent permitted by applicable law, from and against any and all losses, claims, damages, liabilities, joint or several, costs (including reasonable costs
of preparation and reasonable attorneys’ fees) and expenses, judgments, fines, penalties, interest, settlements or other amounts arising from any and all claims, demands, actions, suits or proceedings, whether civil, criminal, administrative or
investigative, in which any Holder Indemnified Person may be involved, or is threatened to be involved, as a party or otherwise, under the Securities Act or otherwise (collectively, “Losses”), as incurred, arising out of or
relating to any untrue or alleged untrue statement of a material fact contained in any Registration Statement under which any Registrable Securities were registered, in any preliminary prospectus (if the Company authorized the use of such
preliminary prospectus prior to the Effective Date), or in any summary or final prospectus or free writing prospectus (if such free writing prospectus was authorized for use by the Company) or in any amendment or supplement thereto (if used during
the period the Company is required to keep the Registration Statement current), or arising out of, based upon or resulting from the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the
statements made therein, in the light of the circumstances in which they were made, not misleading; provided, however, that the Company shall not be liable to any Holder Indemnified Person to the extent that any such claim

  
 11 

 
arises out of, is based upon or results from an untrue or alleged untrue statement or omission or alleged omission made in such Registration Statement, such preliminary, summary or final
prospectus or free writing prospectus or such amendment or supplement, in reliance upon and in conformity with written information furnished to the Company by or on behalf of such Holder Indemnified Person or any underwriter specifically for use in
the preparation thereof. The Company shall notify the Holders promptly of the institution, threat or assertion of any Proceeding of which the Company is aware in connection with the transactions contemplated by this Agreement. This indemnity shall
be in addition to any liability the Company may otherwise have and shall remain in full force and effect regardless of any investigation made by or on behalf of such Holder Indemnified Person or any indemnified party and shall survive the transfer
of such securities by such Holder. Notwithstanding anything to the contrary herein, this Section 6 shall survive any termination or expiration of this Agreement indefinitely. 

(b) In connection with any Registration Statement in which a Holder participates, such Holder shall, severally and not jointly, indemnify and
hold harmless the Company, its Affiliates and each of their respective officers, directors and any agent thereof, to the fullest extent permitted by applicable law, from and against any and all Losses as incurred, arising out of or relating to any
untrue or alleged untrue statement of a material fact contained in any such Registration Statement, in any preliminary prospectus (if used prior to the Effective Date of such Registration Statement), or in any summary or final prospectus or free
writing prospectus or in any amendment or supplement thereto (if used during the period the Company is required to keep the Registration Statement current), or arising out of, based upon or resulting from the omission or alleged omission to state
therein a material fact required to be stated therein or necessary to make the statements made therein, in the light of the circumstances in which they were made, not misleading, but only to the extent that the same are made in reliance and in
conformity with information relating to the Holder furnished in writing to the Company by such Holder for use therein. This indemnity shall be in addition to any liability such Holder may otherwise have and shall remain in full force and effect
regardless of any investigation made by or on behalf of the Company or any indemnified party. In no event shall the liability of any selling Holder hereunder be greater in amount than the dollar amount of the proceeds received by such Holder from
the sale of the Registrable Securities giving rise to such indemnification obligation 
 (c) Any Person entitled to indemnification hereunder
shall (i) give prompt written notice to the indemnifying party of any claim with respect to which it seeks indemnification and (ii) unless in such indemnified party’s reasonable judgment a conflict of interest between such indemnified
and indemnifying parties may exist with respect to such claim or there may be reasonable defenses available to the indemnified party that are different from or additional to those available to the indemnifying party, permit such indemnifying party
to assume the defense of such claim with counsel reasonably satisfactory to the indemnified party. If such defense is assumed, the indemnifying party shall not be subject to any liability for any settlement made by the indemnified party without its
consent (but such consent will not be unreasonably withheld). An indemnifying party who is not entitled to, or elects not to, assume the defense of a claim shall not be obligated to pay the fees and expenses of more than one counsel (in addition to
any local counsel) for all parties indemnified by such indemnifying party with respect to such claim, unless in the reasonable judgment of any indemnified party there may be one or more legal or equitable defenses available to such indemnified party
that are in addition to or may conflict with those available to another indemnified party with respect to such claim. Failure to give prompt written notice shall not release the indemnifying party from its obligations hereunder. 

(d) If the indemnification provided for in this Section 6 is held by a court of competent jurisdiction to be
unavailable to an indemnified party with respect to any Losses referred to herein, the indemnifying party, in lieu of indemnifying such indemnified party thereunder, shall to the extent permitted by applicable law contribute to the amount paid or
payable by such indemnified party as a result of such Losses in such proportion as is appropriate to reflect the relative fault of the indemnifying party, on the one hand, and of the indemnified party, on the other, in connection with the untrue or
alleged untrue statement of a material fact or the omission to state a material fact that resulted in such Losses, as well as any other relevant equitable considerations. The relative fault of the indemnifying party and of the indemnified party
shall be determined by a court of law by reference to, among other things, whether the untrue or alleged untrue statement of a material fact or the omission to state a material fact relates to information supplied by the indemnifying party or by the
indemnified party and the parties’ relative intent, knowledge, access to information and opportunity to correct or prevent such statement or omission; provided, that in no event shall any contribution by a Holder hereunder exceed the net
proceeds from the offering received by such Holder. 

  
 12 

 7. Facilitation of Sales Pursuant to Rule 144. To
the extent it shall be required to do so under the Exchange Act, the Company shall timely file the reports required to be filed by it under the Exchange Act or the Securities Act (including the reports under Sections 13 and 15(d) of the
Exchange Act referred to in subparagraph (c)(1) of Rule 144), and shall take such further action as any Holder may reasonably request, all to the extent required from time to time to enable the Holders to sell Registrable Securities
without registration under the Securities Act within the limitations of the exemption provided by Rule 144. Upon the request of any Holder in connection with that Holder’s sale pursuant to Rule 144, the Company shall deliver to such
Holder a written statement as to whether it has complied with such requirements. 
 8. Miscellaneous. 

(a) Remedies. In the event of actual or potential breach by the Company of any of its obligations under this Agreement, each
Holder, in addition to being entitled to exercise all rights granted by law and under this Agreement, including recovery of damages, will be entitled to specific performance of its rights under this Agreement. The Company agrees that monetary
damages would not provide adequate compensation for any losses incurred by reason of a breach by it of any of the provisions of this Agreement and further agrees that, in the event of any action for specific performance in respect of such breach, it
shall waive the defense that a remedy at law would be adequate. 
 (b) Discontinued Disposition. Subject to the last sentence
of Section 3(o), each Holder agrees that, upon receipt of a notice from the Company of the occurrence of any event of the kind described in clauses (ii) through (v) of Section 3(e),
such Holder will forthwith discontinue disposition of such Registrable Securities under the Registration Statement until such Holder’s receipt of the copies of the supplemental Prospectus or amended Registration Statement as contemplated by
Section 3(j) or until it is advised in writing by the Company that the use of the applicable Prospectus may be resumed, and, in either case, has received copies of any additional or supplemental filings that are
incorporated or deemed to be incorporated by reference in such Prospectus or Registration Statement (a “Suspension Period”). The Company may provide appropriate stop orders to enforce the provisions of this
Section 8(b). 
 (c) Amendments and Waivers. No provision of this Agreement may be waived or amended
except in a written instrument signed by the Company and Holders that hold a majority of the Registrable Securities as of the date of such waiver or amendment; provided, that any waiver or amendment that would have a disproportionate adverse
effect on a Holder relative to the other Holders shall require the consent of such Holder. The Company shall provide prior notice to all Holders of any proposed waiver or amendment. No waiver of any default with respect to any provision, condition
or requirement of this Agreement shall be deemed to be a continuing waiver in the future or a waiver of any subsequent default or a waiver of any other provision, condition or requirement hereof, nor shall any delay or omission of any Party to
exercise any right hereunder in any manner impair the exercise of any such right. 
 (d) Notices. Any and all notices or other
communications or deliveries required or permitted to be provided hereunder shall be in writing and shall be deemed given and effective on the earliest of (i) the date of transmission, if such notice or communication is delivered via facsimile
or electronic mail as specified in this Section 8(d) prior to 5:00 p.m. Central Time on a Business Day, (ii) the Business Day after the date of transmission, if such notice or communication is delivered
via facsimile or electronic mail as specified in this Agreement later than 5:00 p.m. Central Time on any date and earlier than 11:59 p.m. Central Time on such date, (iii) the Business Day following the date of mailing, if
sent by nationally recognized overnight courier service (iv) upon actual receipt by the Party to whom such notice is required to be given. The address for such notices and communications shall be as follows: 

 

					
		 	If to the Company:	  	 IPSCO Tubulars Inc.
 Attention: Vice President,
Secretary and General Counsel
 10120 Houston Oaks Dr.
 Houston,
Texas 770064
 Fax: 281-445-4040

Electronic mail: rchadwick@tmk-ipsco.com

  
 13 

					
		 	With copy to:	  	Latham & Watkins LLP
Attention: Ryan J. Maierson, John M. Greer
811 Main St., Ste. 3700
Houston, Texas 77002
Fax: (713) 546-5401
Electronic mail: ryan.maierson@lw.com;
john.greer@lw.com

			
		 	 If to any Person who is
 then the registered

Holder:
	  	To the address of such Holder as it appears in the applicable register for the Registrable Securities or such other address as may be designated in writing by such Holder (including on the signature pages hereto).

 (e) Successors and Assigns. This Agreement shall be binding upon and inure to the benefit of the
Parties hereto and their respective heirs, executors, administrators, successors, legal representatives and permitted assigns. Except as provided in this Section 8(e), this Agreement, and any rights or obligations
hereunder, may not be assigned without the prior written consent of the Company (acting through the Board) and the Sponsoring Holders. Notwithstanding anything in the foregoing to the contrary, the rights of a Holder pursuant to this Agreement with
respect to all or any portion of its Registrable Securities may be assigned without such consent (but only with all related obligations) with respect to such Registrable Securities (and any Registrable Securities issued as a dividend or other
distribution with respect to, in exchange for or in replacement of such Registrable Securities) by such Holder to a transferee of such Registrable Securities; provided (i) the Company is, within a reasonable time after such transfer,
furnished with written notice of the name and address of such transferee or assignee and the Registrable Securities with respect to which such registration rights are being assigned and (ii) such transferee or assignee agrees in writing to be
bound by and subject to the terms set forth in this Agreement. The Company may not assign its rights or obligations hereunder without the prior written consent of the Sponsoring Holders. 

(f) No Third Party Beneficiaries. Nothing in this Agreement, whether express or implied, shall be construed to give any Person,
other than the parties hereto or their respective successors and permitted assigns, any legal or equitable right, remedy, claim or benefit under or in respect of this Agreement. 

(g) Execution and Counterparts. This Agreement may be executed in any number of counterparts, each of which when so executed
shall be deemed to be an original and all of which taken together shall constitute one and the same Agreement. In the event that any signature is delivered by facsimile or electronic mail transmission, such signature shall create a valid binding
obligation of the Party executing (or on whose behalf such signature is executed) the same with the same force and effect as if such signature delivered by facsimile or electronic mail transmission were the original thereof. 

(h) Governing Law; Consent to Jurisdiction; Waiver of Jury Trial. This Agreement shall be governed by, and construed in
accordance with, the internal laws of the State of New York. Each of the Parties irrevocably submits to the exclusive jurisdiction of the courts of the State of New York located in in the Borough of Manhattan in the City of New York and the United
States District Court for the Southern District of New York for the purpose of any suit, action, proceeding or judgment relating to or arising out of this Agreement and the transactions contemplated hereby. Service of process in connection with any
such suit, action or proceeding may be served on each Party anywhere in the world by the same methods as are specified for the giving of notices under this Agreement. Each of the Parties irrevocably waives any objection to the laying of venue of any
such suit, action or proceeding brought in such courts and irrevocably waives any claim that any such suit, action or proceeding brought in any such court has been brought in an inconvenient forum. EACH OF THE PARTIES HEREBY WAIVES ANY RIGHT TO
REQUEST A TRIAL BY JURY IN ANY LITIGATION WITH RESPECT TO THIS AGREEMENT AND REPRESENTS THAT COUNSEL HAS BEEN CONSULTED SPECIFICALLY AS TO THIS WAIVER. 

(i) Cumulative Remedies. The remedies provided herein are cumulative and not exclusive of any remedies provided by law. 

  
 14 

 (j) Severability. If any term, provision, covenant or restriction of this Agreement
is held by a court of competent jurisdiction to be invalid, illegal, void or unenforceable, the remainder of the terms, provisions, covenants and restrictions set forth herein shall remain in full force and effect and shall in no way be affected,
impaired or invalidated, and the Parties shall use their reasonable efforts to find and employ an alternative means to achieve the same or substantially the same result as that contemplated by such term, provision, covenant or restriction. It is
hereby stipulated and declared to be the intention of the Parties that they would have executed the remaining terms, provisions, covenants and restrictions without including any of such that may be hereafter declared invalid, illegal, void or
unenforceable. 
 (k) Entire Agreement. This Agreement constitutes the entire agreement among the Parties with respect to the
subject matter hereof and supersedes all prior contracts or agreements with respect to the subject matter hereof and the matters addressed or governed hereby, whether oral or written. 

(l) Termination. Except for Section 6, this Agreement shall terminate as to any Holder, when all
Registrable Securities held by such Holder no longer constitute Registrable Securities. 
 [Signature page follows.] 

  
 15 

 IN WITNESS WHEREOF, the Parties have executed this Agreement as of the date first written above.

  

	
	COMPANY:
	
	IPSCO Tubulars Inc.
	
	By:                                     
                                    
	Name:                                     
                               
	Title:                                     
                                 

 Signature Page to Registration Rights Agreement 

 
			
	 INITIAL HOLDER:
  

PAO TMK

		
	By:	 	  

	Name:	 	Vladimir V. Shmatovich
	Title:	 	 Vice President for Strategy and Business

Development

	
	 Address for notice:
  

PAO TMK
 Attention: Vladimir V. Shmatovich

40 Pokrovka Street, Building 2A
 105062, Moscow, Russian
Federation

 Signature Page to Registration Rights AgreementEX-4.3

 Exhibit 4.3 

STOCKHOLDERS AGREEMENT 

STOCKHOLDERS AGREEMENT (this “Agreement”), dated as of
February            , 2018, by and among IPSCO Tubulars Inc., a Delaware corporation (the “Corporation”), and PAO TMK, a company organized under the laws of the Russian
Federation (the “Principal Stockholder”). This Agreement shall become effective (the “Effective Date”) upon the closing of the IPO (as defined below). To the extent the closing of the IPO does not occur, the
provisions of this Agreement shall be without any force or effect. 
 WHEREAS, in order to set forth certain understandings between the
Corporation and the Principal Stockholder (as defined below), including with respect to certain governance matters, the Principal Stockholder and the Corporation wish to enter into this Agreement in accordance with the terms set forth herein. 

NOW, THEREFORE, in consideration of the promises and of the mutual consents and obligations hereinafter set forth, the parties hereto hereby
agree as follows: 
 Section 1    Definitions; Interpretation. 

(a)    Definitions. As used herein, the following terms shall have the following respective
meanings: 
 “Affiliate” means as to any Person, any other Person or entity who directly, or indirectly through one or more
intermediaries, controls, is controlled by or is under common control with such Person. As used in this definition, the term “control,” including the correlative terms “controlling,” “controlled by” and “under
common control with,” means possession, directly or indirectly, of the power to direct or cause the direction of management or policies (whether through ownership of securities or any partnership or other ownership interest, by contract or
otherwise) of a Person. 
 “Agreement” has the meaning set forth in the Preamble. 

“Annual Budget” has the meaning set forth in Section 3(a). 

“Beneficially Own” means that a specified person has or shares the right, directly or indirectly, through any contract,
arrangement, understanding, relationship or otherwise, to vote shares of capital stock of the Corporation. 
 “Board” means
the board of directors of the Corporation. 
 “Business Day” means a day that is not a Saturday, Sunday or day on which
banking institutions in New York City, New York are not required to be open. 
 “Change of Control” means (i) the sale
or disposition of all or substantially all of the assets of the Corporation and its Subsidiaries on a consolidated basis to any person or group (within the meaning of Section 13(d)(3) of the Securities Exchange Act of 1934, as amended), other
than to the Principal Stockholder or its Affiliates; (ii) any transaction or series of related transactions (including, but not limited to, a merger or consolidation) that results in any person or

 
group (within the meaning of Section 13(d)(3) of the Securities Exchange Act of 1934, as amended), other than the Principal Stockholder and its respective Affiliates, acquiring shares of
Common Stock or other equity interest of the Corporation that represent more than 50% of the total voting power of the Corporation (or any resulting company after such transaction); or (iii) a “Change of Control” as defined in any of
the Corporation’s or its Subsidiaries’ existing credit agreements. 
 “Common Stock” means the common stock, par
value $0.01 per share, of the Corporation and any stock into which such Stock may hereafter be changed or for which such Common Stock may be exchanged, and shall also include any Common Stock of the Corporation of any class hereafter authorized.

 “Corporation” has the meaning set forth in the Preamble. 

“Independent Director” means a director that satisfies both (i) the requirements to qualify as an “independent
director” under the rules of any stock exchange on which the shares of Common Stock are then currently listed and (ii) the independence criteria set forth in Rule 10A-3 under the Securities Exchange
Act of 1934, as amended. 
 “IPO” means an initial public offering of the shares of Common Stock in a firm commitment
underwriting effected by the Corporation pursuant to a Registration Statement on Form S-1. 

“PAO Nominee” means any director who has been designated by the Principal Stockholder pursuant to
Section 2. 
 “Person” means any natural person, corporation, partnership, limited liability
company, firm, association, trust, government, governmental agency or other entity, whether acting in an individual, fiduciary or other capacity. 

“Registration Statement” means the Corporation’s registration statement on Form
S-1 (File No. 333-        ), initially filed with the SEC on January 12, 2017. 

“S-1 Effective Date” has the meaning set forth in
Section 2(a). 
 “SEC” means the Securities and Exchange Commission or any successor governmental
agency. 
 “Stock” means (i) the outstanding shares of Common Stock, (ii) any additional shares of Common Stock
that may be issued in the future and (iii) any shares of capital stock of the Corporation into which such shares may be converted or for which such shares may be exchanged. 

“Subsidiary” means, with respect to any Person, any corporation, limited liability company, partnership, joint venture or
other legal entity of which such Person (either above or through or together with any other Subsidiary) owns, directly or indirectly, more than 50% of the stock or other equity interests the holders of which are generally entitled to vote for the
election of the board of directors or other governing body of such corporation or other legal entity. 

  
 2 

 Any capitalized term used in any Section of this Agreement that is not defined in this
Section 1 shall have the meaning ascribed to it in such other Section. 

(b)    Rules of Construction. For all purposes of this Agreement, unless
otherwise expressly provided: 
 (i)    the headings and captions of this Agreement are for convenience
of reference only and shall not define, limit or otherwise affect any of the terms hereof; 
 (ii)    the
term “including” is not limiting and means “including without limitation”; and 

(iii)    whenever the context requires, the gender of all words used herein shall include the masculine,
feminine and neuter, and the number of all words shall include the singular and plural. 
 Section 2    Board of
Directors. 
 (a)    Initial Board. As of the effective date of the Registration Statement
(the “S-1 Effective Date”), the Board shall initially consist of the following directors (the “Initial Board”): 

(i)    four directors designated by the Principal Stockholder as PAO Nominees: Andrei Zimin, Alexander
Pumpyanskiy, Peter “Piotr” Galitzine and Vladimir Shmatovich; and 
 (ii)    two directors who
are Independent Directors: Anthony Tripodo and John Fees; 
 The Corporation shall take such action to cause an increase in the size of the
Board such that there are at least three directors who are Independent Directors within one year following the S-1 Effective Date, with such Independent Directors appointed after the date hereof to the Board
to be selected by the Board. 
 (b)    Nomination of Directors. After the appointment of the
Initial Board as set forth above, for as long as the Principal Stockholder Beneficially Owns the percentages of Common Stock set forth below, the Principal Stockholder shall have the right to nominate for election to the Board such number of
directors that is equal to: 
 (i)    such number of directors that would constitute a majority of the
number of directors that the Corporation would have if there were no vacancies on the Board, so long as the Principal Stockholder Beneficially Owns at least 50% of the outstanding Common Stock; 

(ii)    such number of directors equal to one director fewer than that number that would constitute a
majority of the number of directors that the 

  
 3 

 
Corporation would have if there were no vacancies on the Board, so long as the Principal Stockholder Beneficially Owns at least 30% of the outstanding Common Stock but less than 50% of the
outstanding Common Stock; 
 (iii)    the greater of (A) two directors and (B) 25% of the total
number of directors that constitute the Board (rounded up to the next whole number), so long as the Principal Stockholder Beneficially Owns at least 20% of the outstanding Common Stock but less than 30% of the outstanding Common Stock; 

(iv)    the greater of (A) one director and (B) 15% of the total number of directors that constitute
the Board (rounded up to the next whole number), so long as the Principal Stockholder Beneficially Owns at least 10% of the outstanding Common Stock but less than 20% of the outstanding Common Stock; and 

(v)    one director, so long as the Principal Stockholder Beneficially Owns at least 5% of the outstanding
Common Stock but less than 10% of the outstanding Common Stock. 
 (c)    Election of
Directors. The Corporation shall take all action within its power to cause all PAO Nominees nominated pursuant to Section 2(b) to be included in the slate of nominees recommended by the Board to the
Corporation’s stockholders for election as directors at each annual meeting of the stockholders of the Corporation (and/or in connection with any election by written consent) and the Corporation shall use all reasonable best efforts to cause
the election of each such nominee, including by soliciting proxies in favor of the election of such PAO Nominees. Without limiting the foregoing, at any annual or special meeting of stockholders of the Corporation at which directors are to be
elected, the Corporation shall either re-nominate for election each then-serving PAO Nominee (provided that, if at such time the Principal Stockholder shall be entitled to nominate fewer PAO Nominees pursuant
to Section 2(b) than the number of then-serving PAO Nominees, the Principal Stockholder shall notify the Corporation in writing of the PAO Nominees that shall not be nominated for subsequent election) or such other PAO
Nominees(s) as the Principal Stockholder may designate to the Corporation in writing. If at any time the outstanding voting power of the Common Stock of the Corporation that is Beneficially Owned by the Principal Stockholder decreases by such amount
that the Principal Stockholder shall be entitled to fewer PAO Nominees pursuant to Section 2(b) than the number of then-serving PAO Nominees, then, at the request of the Corporation, the Principal Stockholder shall cause
the resignation of a number of PAO Nominee(s) necessary so that, following such resignations, the number of PAO Nominees is equal to the number of PAO Nominees that the Principal Stockholder is entitled to designate pursuant to
Section 2(b), if any. 
 (d)    Replacement of Directors. In the
event that a vacancy is created at any time by the death, disability, retirement, resignation or removal (with or without cause) of a PAO Nominee nominated by the Principal Stockholder pursuant to Section 2(b) or
designated by the Principal Stockholder pursuant to this Section 2(d), or in the event that (i) such nominee is not elected and (ii) no other director is elected by stockholders instead of such nominee, the
Principal Stockholder shall have the right to designate a 

  
 4 

 
replacement to fill such vacancy. The Corporation shall take all action within its power to cause such vacancy to be filled by the replacement so designated by the Principal Stockholder, and
the Board shall promptly elect such designee to the Board. Upon the written request of the Principal Stockholder, the Corporation shall take all actions necessary to remove, with or without cause, any PAO Nominee previously nominated by the
Principal Stockholder pursuant to Section 2(b) or designated by the Principal Stockholder pursuant to this Section 2(d), and to elect any replacement PAO Nominee designated by the Principal
Stockholder as provided in the first sentence of this Section 2(d). Any director designated by this Section 2(d) shall be considered to be a PAO Nominee following such designation. 

(e)    Increase or Decrease in the Size of the Board. In the event the size of the Board is
increased or decreased at any time, the number of directors of the Board subject to designation by the Principal Stockholder pursuant to Section 2(b) following such increase or decrease shall equal the product of the
total number of seats on the increased or decreased Board multiplied by the percentage of seats on the Board subject to the Principal Stockholder’s designation rights pursuant to Section 2(b) immediately prior to
such increase or decrease, rounded up to the nearest whole number. 
 (f)    Committees. So
long as the Principal Stockholder has the right to nominate at least one director for election to the Board pursuant to Section 2(b) above, the Corporation shall take all action within its power to cause each committee of
the Board to include in its membership at least one of the PAO Nominees, except to the extent that such membership would violate applicable securities laws or stock exchange or stock market rules. 

(g)    No Limitation. The provisions of this Section 2 are intended
to provide the Principal Stockholder with the minimum Board representation rights set forth herein. Nothing in this Agreement shall prevent the Corporation from having a greater number of nominees or designees of the Principal Stockholder on
the Board than otherwise provided herein. In addition, nothing in this Section 2 shall be construed to prevent the Principal Stockholder from having a lesser number of nominees or designees than otherwise provided
herein or pursuant to applicable law and the Corporation’s certificate of incorporation and bylaws. 

(h)    Laws and Regulations. Nothing in this Section 2 shall be
deemed to require that any party hereto, or any Affiliate thereof, act or be in violation of any applicable provision of law, regulation, legal duty or requirement or stock exchange or stock market rule. 

Section 3    Certain Actions. 

(a)    Subject to the provisions of Section 3(b), without the approval of the
Principal Stockholder, the Corporation shall not, and (to the extent applicable) shall not permit any Subsidiary of the Corporation to: 

(i)    enter into or agree to undertake any transaction that would constitute a Change of Control; 

  
 5 

 (ii)    issue additional Stock of the Corporation or any of
its Subsidiaries, other than (A) any award under any stockholder-approved equity compensation plan or (B) any intra-company issuance among the Corporation and its Subsidiaries; or 

(iii)    change the size of the Board. 

(b)    The approval rights set forth in Section 3(a) above shall terminate
at such time as the Principal Stockholder no longer Beneficially Owns at least 50% of the outstanding Common Stock. 

Section 4    Duration of Agreement. 

This Agreement shall terminate automatically upon the first to occur of the following: (a) the dissolution of the Corporation (unless
the Corporation continues to exist after such dissolution as a limited liability company or in another form, whether incorporated in Delaware or another jurisdiction); (b) the date on which Principal Stockholder ceases to Beneficially Own at
least 5% of the outstanding Common Stock; and (c) upon written agreement by the Corporation and the Principal Stockholder. 

Section 5    Severability. 

If any provision of this Agreement shall be determined to be illegal and unenforceable by any court of law, the remaining provisions shall be
severable and enforceable in accordance with their terms. 
 Section 6    Governing Law; Jurisdiction. 

(a)    This Agreement shall be governed by, and construed in accordance with, the laws of the State of
Delaware, without giving effect to its choice or conflict of law provisions or rules. 
 (b)    Any suit,
action or proceeding seeking to enforce any provision of, or based on any matter arising out of or in connection with, this Agreement may be brought against any of the parties in any federal court located in the State of Delaware or any Delaware
state court, including the Delaware Chancery Courts located in Wilmington, Delaware, and each of the parties hereby consents to the exclusive jurisdiction of such court (and of the appropriate appellate courts) in any such suit, action or proceeding
and 

  
 6 

 
waives any objection to venue laid therein. Process in any such suit, action or proceeding may be served on any party anywhere in the world, whether within or without the jurisdiction of any such
court. Without limiting the foregoing, each of the parties agrees that service of process upon such party at the address referred to in Section 13, together with written notice of such service to such party, shall be deemed effective service of
process upon such party. 
 Section 7    Jury Trial. 

BECAUSE DISPUTES ARISING IN CONNECTION WITH COMPLEX FINANCIAL TRANSACTIONS ARE MOST QUICKLY AND ECONOMICALLY RESOLVED BY AN EXPERIENCED AND
EXPERT PERSON AND THE PARTIES WISH APPLICABLE STATE AND FEDERAL LAWS TO APPLY (RATHER THAN ARBITRATION RULES), THE PARTIES DESIRE THAT THEIR DISPUTES BE RESOLVED BY A JUDGE APPLYING SUCH APPLICABLE LAWS. THEREFORE, TO ACHIEVE THE BEST
COMBINATION OF THE BENEFITS OF THE JUDICIAL SYSTEM AND/OR ARBITRATION, THE PARTIES HERETO WAIVE ALL RIGHT TO TRIAL BY JURY IN ANY ACTION, SUIT OR PROCEEDING BROUGHT TO ENFORCE OR DEFEND ANY RIGHT OR REMEDIES UNDER THIS AGREEMENT OR ANY DOCUMENTS
ENTERED INTO IN CONNECTION WITH THIS AGREEMENT AND THE TRANSACTIONS CONTEMPLATED HEREIN. 
 Section 8    Stock
Dividends, Etc. 
 The provisions of this Agreement shall apply to any and all shares of capital stock of the
Corporation or any successor or assignee of the Corporation (whether by merger, consolidation, sale of assets or otherwise) which may be issued in respect of, in exchange for or in substitution for the shares of Stock, by reason of any stock
dividend, split, reverse split, combination, recapitalization, reclassification, merger, consolidation or otherwise in such a manner and with such appropriate adjustments as to reflect the intent and meaning of the provisions hereof and so that the
rights, privileges, duties and obligations hereunder shall continue with respect to the capital stock of the Corporation as so changed. 

Section 9    Benefits of Agreement. 

This Agreement shall be binding upon and inure to the benefit of the parties hereto, and each of their respective successors and
assigns. Except as otherwise expressly provided herein, no Person not a party to this Agreement, as a third-party beneficiary or otherwise, shall be entitled to enforce any rights or remedies under this Agreement. 

  
 7 

 Section 10    Notices. 

All notices or other communications which are required or permitted hereunder shall be in writing and shall be deemed to have been given if
(a) personally delivered or sent by facsimile, (b) sent by nationally recognized overnight courier or (c) sent by registered or certified mail, postage prepaid, return receipt requested, addressed as follows: 

(i)    If to the Corporation, to: 

IPSCO Tubulars Inc. 
 10120
Houston Oaks Dr. 
 Houston, Texas 77064 

Attn: Ryan Chadwick 
 Facsimile:
(281) 445-4040 
 with copies (which shall not constitute notice) to: 

Latham & Watkins LLP 

811 Main Street, Suite 3700 

Houston, Texas 77002 

Attn: Ryan Maierson; John Greer 

Facsimile: (713) 546-5401 

(ii)    If to the Principal Stockholder, to: 

PAO TMK 
 40 Pokrovka Street

 Building 2A, 105062 

Moscow, Russian Federation 

Attention: Vladimir V. Shmatovich 

with copies (which shall not constitute notice) to: 

Latham & Watkins LLP 

Ulitsa Gasheka, 6, Ducat III, Office 510 

Moscow 125047, Russia 
 Attn:
Mikhail Turetsky 
 Facsimile: 7 (495) 785-1235 

(iii)    Any such communication shall be deemed to have been received (a) when delivered, if
personally delivered or sent by facsimile, (b) the next Business Day after delivery, if sent by nationally recognized, overnight courier and (c) on the third Business Day following the date on which the piece of mail containing such
communication is posted, if sent by first-class mail. 
 Section 11    Modification; Waiver.

This Agreement may be amended, modified or supplemented only by a written instrument duly executed by the Corporation and the Principal
Stockholder. No course of dealing between the Corporation or its Subsidiaries and the Principal Stockholder (or any of them) or any delay in exercising any rights hereunder will operate as a waiver of any rights of any party to this
Agreement. The failure of any party to enforce any of the provisions of this Agreement will in no way be construed as a waiver of such provisions and will not affect the right of such party thereafter to enforce each and every provision of this
Agreement in accordance with its terms. 

  
 8 

 Section 12    Entire Agreement. 

Except as otherwise expressly provided herein, this Agreement constitutes the entire agreement among the parties pertaining to the subject
matter hereof and supersedes all prior and contemporaneous agreements and understandings of the parties in connection therewith, from and after the completion of the IPO.

Section 13    Specific Performance. 

Each party to this Agreement acknowledges that a remedy at law for any breach or attempted breach of this Agreement will be inadequate, agrees
that each other party to this Agreement shall be entitled to specific performance and injunctive and other equitable relief in case of any such breach or attempted breach, and further agrees to waive (to the extent legally permissible) any legal
conditions required to be met for the obtaining of any such injunctive or other equitable relief (including posting any bond in order to obtain equitable relief). 

Section 14    Counterparts. 

This Agreement may be executed in any number of counterparts, and each such counterpart shall be deemed to be an original instrument, but all
such counterparts taken together shall constitute but one agreement.
 Section 15    Further Assurances.

 Each party hereto shall do and perform or cause to be done and performed all such further acts and things and shall execute and deliver
all such other agreements, certificates, instruments and other documents as any other party hereto reasonably may request in order to carry out the provisions of this Agreement and the consummation of the transactions contemplated hereby. 

Section 16    Director and Officer Actions. 

No director or officer of the Corporation shall be personally liable to the Corporation or the Principal Stockholder as a result of any acts or
omissions taken under this Agreement in good faith. 
 [Signature Page to Follow] 

  
 9 

 The parties have signed this agreement as of the date first written above. 

 

					
	IPSCO Tubulars Inc.
		
	By:	 	  

		 	Name:	 	Peter “Piotr” Galitzine
		 	Title:	 	Chief Executive Officer
	
	PAO TMK
		
	By:	 	  

		 	Name:	 	Vladimir V. Shmatovich
		 	Title:	 	Vice President for Strategy and Business Development

  
 Signature Page to
Stockholders Agreement

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