Document:

EX-10.1

 Exhibit 10.1 

Execution Copy 

COOPERATION AGREEMENT 

This Cooperation Agreement, dated as of January 29, 2018 (this “Agreement”), is by and among Ultra Petroleum Corp. (the
“Company”) and Fir Tree Capital Management LP (“Fir Tree”). 
 WHEREAS, Fir Tree is a long-term
shareholder of the Company and the Company and Fir Tree have engaged in various discussions and communications concerning the Company’s long-term business plans; 

WHEREAS, as of the date hereof, Fir Tree and its Affiliates (i) Beneficially Own 36,379,590 common shares of the Company, without par
value (the “Common Stock”), which represents approximately 18.53% of the Common Stock issued and outstanding as of the date hereof and (ii) have a Synthetic Net Long Position (as defined herein) in 7,038,874 shares of Common
Stock; 
 WHEREAS, the Company and Fir Tree have determined to come to an agreement with respect to certain matters relating to the board of
directors of the Company (the “Board”) and certain other matters, as provided in this Agreement; 
 WHEREAS, on
January 30, 2018, the Company shall issue a press release in the form attached hereto as Exhibit A (the “Press Release”) announcing, among other things, (i) the resignation of Mr. Michael Watford from his
position as President and Chief Executive Officer of the Company, effective as of the earlier of (a) the date of the announcement of the Company’s 2017 Q4 earnings and (b) February 28, 2018 (the earlier of such dates, the
“Earnings Release Date”), (ii) the appointment of Mr. Brad Johnson as the interim Chief Executive Officer of the Company, effective as of the Earning Release Date and (iii) certain other matters set forth in this
Agreement; and 
 WHEREAS, each of Dr. W. Charles Helton and Mr. Roger A. Brown will resign from their respective positions
on the Board and any committees thereof, effective as of the Earnings Release Date. 
 NOW, THEREFORE, in consideration of the covenants and
agreements contained herein, and for other good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, the parties hereto agree as follows: 

1.    Board Representation. 

(a)    On the Earnings Release Date, the Board and all applicable committees of the Board shall take all necessary actions
to (1) accept the resignation of Dr. W. Charles Helton from the Board and (2) cause Mr. Evan Lederman to be appointed to the Board to fill the vacancy resulting from such resignation to serve for the Initial Term. The appointment
of Mr. Lederman will be subject to the execution by Mr. Lederman, prior to such appointment, of all director onboarding materials (which onboarding materials will be no more onerous than the onboarding materials provided to other non-executive directors of the Board) provided to Mr. Lederman prior to the Earnings Release Date. 

 (b)    Following the execution and delivery of this Agreement, Fir Tree will
propose to the Board three (3) to five (5) nominees for appointment to the Board who meet the New Independent Director Criteria, and Fir Tree and the Board will work together to select, prior to the Earnings Release Date, a mutually
agreeable, qualified Person from such nominees proposed by Fir Tree for appointment to the Board (such mutually agreeable and qualified person, the “New Independent Director,” and together with Mr. Lederman, the “New
Directors”). On the Earnings Release Date, the Board and all applicable committees of the Board shall take all necessary actions to (1) accept the resignation of Mr. Roger A. Brown from the Board and (2) cause the New
Independent Director to be appointed to the Board to fill the vacancy resulting from such resignation to serve for the Initial Term. The appointment of the New Independent Director will be subject to the execution by the New Independent Director,
prior to the Earnings Release Date, of all director onboarding materials (which onboarding materials will be no more onerous than the onboarding materials provided to other non-executive directors of the
Board) provided to the New Independent Director prior to the Earnings Release Date. Should the Company and Fir Tree be unable to mutually agree upon a New Independent Director prior to the Earnings Release Date, the Company shall take all necessary
steps to provide a written response detailing the reasons why such nominees were not acceptable to the Board, and Fir Tree will be entitled to continue to recommend different nominees that meet the New Independent Director Criteria until a New
Independent Director is so mutually agreed upon and is appointed to the Board. 
 (c)    At all times while serving as a
member of the Board (and as a condition to such service), the New Directors shall (i) comply with all policies, codes and guidelines applicable to Board members (subject to Section 7(b)) (the “Director Policies”) and
(ii) in the case of the New Independent Director, otherwise qualify as “independent” of the Company pursuant to the applicable securities laws and stock exchange requirements; provided that Fir Tree shall not be responsible for any
breach of this Section 1(e) by the New Independent Director. The Company agrees that during the Standstill Period, any changes to the Director Policies, or new Director Policies, will be adopted in good faith and not for the purpose of
undermining or conflicting with the arrangements contemplated hereby. 
 (d)    Should any of the New Directors resign
from the Board or become unable to serve on the Board due to death, disability or other reasons prior to the expiration of the Initial Term, Fir Tree will have the right to recommend for appointment to the Board a replacement director meeting the
Replacement Director Criteria (a “Replacement”). The appointment of a Replacement for a New Director will be subject to such Replacement having provided all director onboarding materials (which onboarding materials will be no more
onerous than and in substantially the same form as the onboarding materials provided to other non-executive directors of the Board), interviews with members of the Board (to be conducted within ten
(10) business days of Fir Tree’s recommendation of such Replacement), and a customary background check. The Company will complete its approval process within ten (10) business days of the later of its receipt of the Replacement’s
director onboarding materials and the date of such interview. The Company shall appoint a Replacement to the Board if (and only if), taking into account the Replacement’s skillset and experience (only if such replacement is a Replacement for
the New Independent Director), it finds a Replacement to be reasonably acceptable. Promptly after a determination that a Replacement is reasonably acceptable, the Board and all applicable 

  
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committees of the Board shall take all necessary actions to cause the Replacement to be appointed to the Board and, if the Replacement is qualified under applicable securities laws and stock
exchange requirements, as a member of those Board committees on which the New Director being replaced served, in each case, for the remainder of the Initial Term. In the event the Board reasonably finds that a Replacement is not acceptable, Fir Tree
will be entitled to recommend different nominees which meet the Replacement Director Criteria, and such nominees will be subject to the foregoing approval process. For the avoidance of doubt, Fir Tree will be entitled to continue to recommend
different nominees which meet the foregoing criteria until a Replacement is appointed. Except as otherwise specified in this Agreement, if a Replacement is appointed, all references in this Agreement to the terms “New Directors” and
“New Independent Director” will include such Replacement, as applicable. Except as otherwise expressly permitted herein, the Company and the Board shall not take any action to remove or seek the removal of any of the New Directors
during the Standstill Period (defined below). 
 2.    Standstill Provisions. During the period commencing with
the execution and delivery of this Agreement and ending on the Standstill End Date (the “Standstill Period”), Fir Tree shall not, nor shall it permit any of its Affiliates and Associates under its control, directly or indirectly, in
any manner (whether alone or in concert with others), to take any of the following actions (unless specifically permitted to do so in writing in advance by the Board): 

(a)    acquire, offer to acquire, or cause to be acquired Beneficial Ownership of, or a Synthetic Long Position in, any
Voting Securities such that immediately following such transaction Fir Tree and its Affiliates would collectively have either (i) Beneficial Ownership of more than 25% of the then outstanding Voting Securities or (ii) a Total Net Long
Position of more than 30% in the then outstanding Voting Securities; 
 (b)    solicit proxies or written consents of
stockholders or conduct any other type of referendum (binding or non-binding) with respect to, or from the holders of, Voting Securities, or become a “participant” (as such term is defined in
Instruction 3 to Item 4 of Schedule 14A promulgated under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)), in or assist, advise, knowingly encourage or knowingly influence any Third Party in any
“solicitation” of any proxy, consent or other authority (as such terms are defined under the Exchange Act) to vote or withhold from voting any Voting Securities (other than such advice, encouragement or influence that is consistent with
the Board’s recommendation in connection with such matter); 
 (c)    other than through open market or block trade
brokered sale transactions where the identity of the purchaser is unknown to Fir Tree or in connection with a tender or exchange offer, sell, offer or agree to sell any Voting Securities to any Third Party that, to the knowledge of Fir Tree after
reasonable and feasible inquiry, (i) has aggregate Beneficial Ownership (together with its Affiliates and Associates) of more than 9.9% of the issued and outstanding Common Stock or (ii) would result in such Third Party having aggregate
Beneficial Ownership (together with its Affiliates and Associates) of more than 9.9% of the issued and outstanding Common Stock; 

  
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 (d)    effect or seek to effect, offer or propose to effect, cause or
participate in, or in any way assist, facilitate or encourage any other Person to effect or seek, offer or propose to effect or participate in, any tender or exchange offer, take-over bid (including any exempt take-over bid under Canadian securities
laws), merger, consolidation, acquisition, scheme, arrangement, business combination, recapitalization, reorganization, sale or acquisition of assets, liquidation, dissolution or other extraordinary transaction involving the Company or any of its
subsidiaries or any of their respective securities (each, an “Extraordinary Transaction”) other than an Extraordinary Transaction approved by the Board; provided that nothing in this paragraph (d) shall preclude or
prohibit Fir Tree (or its Affiliates) from tendering into a tender or exchange offer or from voting for or against any such Extraordinary Transaction; 

(e)    (i) call or seek the Company or any other Person to call any meeting of shareholders, including by written consent
or by requisition under Section 144 of the Yukon Business Corporations Act (“YBCA”), (ii) seek representation on, or nominate (or encourage any other Person to so seek or nominate) any candidate to, the Board (except as
expressly provided by this Agreement), (iii) seek the removal of any member of the Board or (iv) make (or encourage any other Person to make) any proposal at any annual or special meeting of the Company’s stockholders; 

(f)    take any public action in support of or make any public proposal or request that constitutes or relates to:
(i) advising, controlling, changing or knowingly influencing the Board or management of the Company, including any plans or proposals to change the number or term of directors or to fill any vacancies on the Board (except as provided for in
this Agreement), (ii) any material change in the capitalization, stock repurchase programs and practices, capital allocation programs and practices or dividend policy of the Company, (iii) any other material change in the Company’s
management, business or corporate structure, (iv) seeking to have the Company waive or make amendments or modifications to the Company’s certificate of reorganization or bylaws, or other actions that may impede or facilitate the
acquisition of control of the Company by any Person, (v) causing a class of securities of the Company to be delisted from, or to cease to be authorized to be quoted on, any securities exchange or (vi) causing a class of securities of the
Company to become eligible for termination of registration pursuant to Section 12(g)(4) of the Exchange Act; 

(g)    make any public disclosure, announcement or statement regarding any intent, purpose, plan or proposal with respect
to the Board, the Company, its management, policies or affairs, any of its securities or assets or this Agreement that is inconsistent with the provisions of this Agreement; 

(h)    form or join in a partnership, limited partnership, syndicate or other group, including a “group” as
defined under Section 13(d) of the Exchange Act, with respect to the Voting Securities (for the avoidance of doubt, excluding any group composed solely of Fir Tree and its Affiliates); 

(i)    make any request or application under Sections 24, 139, 145, 232, 241 or 243 of the YBCA; 

(j)    institute, solicit or join, as a party, any litigation, arbitration or other proceeding (including any derivative
action) against the Company or any of its future, current or former directors or officers or employees (provided, that nothing shall prevent Fir Tree from (i) bringing 

  
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litigation to enforce the provisions of this Agreement, (ii) being a party to a class action instituted by a Third Party without the assistance or encouragement of Fir Tree (iii) making
counterclaims with respect to any proceeding initiated by, or on behalf of, the Company, (iv) bringing bona fide commercial disputes that do not relate to the subject matter of this Agreement (and not, for the avoidance of doubt, in its
capacity as a shareholder of the Company), or (v) exercising statutory appraisal rights); 
 (k)    enter into any
discussions, negotiations, agreements, or understandings with any Third Party with respect to any of the foregoing, or assist, advise, knowingly encourage or knowingly influence any Third Party to take any action or make any statement with respect
to any of the foregoing, or otherwise take or cause any action or make any statement inconsistent with any of the foregoing; or 

(l)    contest the validity of, or publicly request any waiver of, the obligations set forth in this Section 2
(except in the event of a material breach of this Agreement by the Company). 
 Notwithstanding anything in this Agreement to the contrary, the foregoing
provisions of this Section 2 shall not be deemed to (i) prohibit Fir Tree or its Affiliates, Associates, directors, officers, partners, employees, members or agents (acting in such capacity) from communicating privately with the
Company’s directors or officers so long as such communications are not intended to, and would not reasonably be expected to, require any public disclosure of such communications; (ii) restrict any New Director in the exercise of his
fiduciary duties; or (iii) prevent Fir Tree, its Affiliates or its Associates from making (a) any public or private statement or announcement with respect to an Extraordinary Transaction that is publicly announced by the Company or a Third
Party or (b) any factual statement as required by a Legal Requirement (as defined below) (so long as such request did not arise as a result of discretionary acts by Fir Tree or any of its Affiliates). 

The restrictions in this Section 2 shall terminate automatically upon the earliest of (i) the expiration of the Standstill Period; (ii) upon
ten (10) days’ prior written notice delivered by Fir Tree to the Company following a material breach of this Agreement by the Company (including, without limitation, a failure to appoint or nominate the New Directors or Replacements in
accordance with Section 1) if such breach has not been cured within such notice period, provided that Fir Tree is not then in material breach of this Agreement; (iii) upon the announcement by the Company that it has entered into a
definitive agreement with respect to any Extraordinary Transaction; (iv) the commencement of any tender or exchange offer (by a Person other than Fir Tree or its Affiliates) which, if consummated, would constitute an Extraordinary Transaction
that would result in the acquisition by any Person or group of more than 50% of the Company common shares, where the Company files a Schedule 14D-9 (or any amendment thereto), other than a “stop, look and
listen” communication by the Company pursuant to Rule 14d-9(f) promulgated under the Exchange Act, that does not recommend that the Company’s shareholders reject such tender or exchange offer; and
(v) the adoption by the Board of any amendment to the Articles of Continuance, Articles of Reorganization, or the Bylaws of the Company that would reasonably be expected to substantially impair the ability of a shareholder to submit nominations
for election to the Board or shareholder proposals in connection with any future meeting of the Company’s shareholders (in a manner inconsistent with the requirements of this Agreement). 

  
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 3.    Voting Commitment. Starting on the date on which the New
Directors are appointed to the Board in accordance with Section 1, Fir Tree agrees that it will cause all Voting Securities Beneficially Owned (including, for the avoidance of doubt, Beneficial Ownership of any Voting Securities acquired after
the date of this Agreement) by Fir Tree and its Affiliates as of the record date for and entitled to vote at each Annual Meeting during the Standstill Period to be present for quorum purposes and voted at such meetings (i) in favor of the
Company’s nominees, (ii) against the election of any directors that have not been nominated or recommended by the Company, (iii) in accordance with the Board’s recommendation with respect to auditor ratification proposals and
(iv) in accordance with the Board’s recommendation with respect to any other proposal presented at such meeting (including, for the avoidance of doubt, the proposal to approve the Amendment), provided however, that in the case of this
clause (iv), Fir Tree and its Affiliates shall be permitted to vote in its sole discretion with respect to any proposal (A) related to an Extraordinary Transaction, (B) which has received an “against” recommendation from
Institutional Shareholder Services or Glass Lewis, (C) related to the implementation of takeover defenses or adversely affecting the rights of shareholders, (D) related to new or amended incentive compensation plans, or (E) any
proposed issuance of Voting Securities or any securities convertible into, or exercisable or exchangeable for, Voting Securities. 

4.    Resignation. Prior to the appointment of any New Director to the Board, such New Director shall deliver to
the Company an irrevocable resignation letter pursuant to which such New Director shall resign from the Board and all applicable committees thereof if Fir Tree has breached this Agreement in any material respect and, if such breach is capable of
being cured, such breach has not been cured within 10 days after receipt by Fir Tree of written notice from the Board specifying such breach. If any such New Director’s resignation is effected in accordance with this
Section 4, the Company shall have no further obligations under Section 1 of this Agreement. 

5.    Non-Disparagement. Until the expiration of the Standstill Period, Fir
Tree and the Company agree not to (and will cause any Persons acting on their behalf not to) make, or cause to be made (whether directly or indirectly), any public statement or any public announcement (including in any document filed with or
furnished to the SEC, Canadian securities regulators or through the media), or any statement to any shareholder or investor of the other party or any analyst, in each case which constitutes an ad hominem attack on, or otherwise disparages,
the other party’s past, present or future affiliates, directors, officers, partners, principals, managers or employees. Nothing in this Section 5 shall be deemed to prevent either the Company or Fir Tree from complying with its respective
disclosure obligations under a Legal Requirement. 
 6.    Public Announcements. No later than 9:30 a.m. Eastern
Time on January 30, 2018, the Company shall announce this Agreement by means of the Press Release. Neither the Company nor Fir Tree shall make or cause to be made any public announcement or statement with respect to the subject of this
Agreement that is contrary to the statements made in the Press Release, except as required by law or the rules of any stock exchange or with the prior written consent of the other party. The Company acknowledges that Fir Tree may file this Agreement
as an exhibit to its Schedule 13D. The Company shall be given a reasonable opportunity to review and comment on any Schedule 13D filing made by Fir Tree with respect to this Agreement, and 

  
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Fir Tree shall give reasonable consideration to the comments of the Company. Fir Tree acknowledges and agrees that the Company may file this Agreement and file or furnish the Press Release with
the SEC as exhibits to a Current Report on Form 8-K and other filings with the SEC. Fir Tree shall be given a reasonable opportunity to review and comment on any filing made by the Company with respect to this
Agreement, and the Company shall give reasonable consideration to the comments of Fir Tree. 

7.    Confidentiality. 

(a)    Each New Director shall be required to comply with the Company’s Code of Ethics and Business Conduct as in
effect on the date of this Agreement, including provisions relating to the confidentiality, disclosure and use of (including trading or influencing the actions of any Person based on) any non-public
information entrusted to or obtained by such director by reason of his or her position as a director of the Company (“Confidential Information”). 

(b)    Notwithstanding the foregoing, each of the New Directors if affiliated with Fir Tree (or their Replacement if
affiliated with Fir Tree) may, if he or she wishes to do so, provide Confidential Information to Fir Tree and its investment professionals, controlled Affiliates, officers, directors, employees, agents, representatives and advisors (including legal,
tax, accounting and financial advisors and excluding, for the avoidance of doubt, any New Director) (“Fir Tree Representatives”) solely to the extent that provision of any such information is made in compliance with applicable
securities laws and such Fir Tree Representatives need to know such information in connection with Fir Tree’s investment in the Company or in order to assist such New Directors in the discharge of their fiduciary duties; provided, however, that
Fir Tree (i) shall inform each Fir Tree Representative of the confidential nature of the Confidential Information and (ii) shall not, and shall cause each Fir Tree Representative not to, and shall instruct each other Fir Tree
Representative not to, disclose any Confidential Information to any Person other than Fir Tree Representatives in compliance with this Section 7(b). Fir Tree shall be responsible for the breach of this Section 7(b) by any of the Fir Tree
Representatives. Notwithstanding the foregoing, neither Fir Tree nor any Fir Tree Representative shall be required to keep confidential or not disclose any information that (i) is already in the possession of Fir Tree or a Fir Tree
Representative from a source other than the Company, provided that such information is not known by Fir Tree, at the time of disclosure, to be subject to a confidentiality agreement with, or other obligation of confidentiality to, the Company;
(ii) is or becomes generally known to the public other than as a result of a disclosure by Fir Tree or any of the Fir Tree Representatives in breach of this Section 7; (iii) is or becomes available or known to Fir Tree or any of the Fir
Tree Representatives on a non-confidential basis from a source other than the Company, provided that such source is not known by Fir Tree to be bound by a confidentiality agreement with, or other obligation of
confidentiality to, the Company; (iv) is or was independently developed by Fir Tree or any of the Fir Tree Representatives without any use of Confidential Information; or (v) is approved for disclosure by written authorization from the
Company. 
 (c)    In the event that Fir Tree or any Fir Tree Representative is required by applicable subpoena, legal
process or other legal requirement, or formally requested in an audit or examination by a regulator or self-regulatory organization with jurisdiction to regulate or oversee any aspect of its business (each, a “Legal Requirement”),
to disclose any of the Confidential 

  
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Information, Fir Tree will, to the extent legally permissible and practicable, promptly notify the Company in writing in advance (including by email) so that the Company may seek a protective
order or other appropriate remedy, at its sole cost and expense. Following notification by Fir Tree to the Company (or before such notification if prior notification is not legally permissible or practicable), Fir Tree and the Fir Tree
Representatives may honor any such Legal Requirement if and solely to the extent that (a) such Person produces or discloses only that portion of the Confidential Information which its legal counsel advises it is legally required to be so
produced or disclosed and such Person informs the recipient of such Confidential Information of the existence of the confidentiality obligations under this Section 7 and the confidential nature of the Confidential Information or (b) the
Company consents in writing to having the Confidential Information produced or disclosed pursuant to a Legal Requirement. In no event will Fir Tree oppose action by the Company to obtain a protective order or other relief to prevent the production,
disclosure or use of the Confidential Information or to obtain reliable assurance that confidential treatment will be afforded the Confidential Information. Notwithstanding any other provision of this Agreement to the contrary, if Fir Tree or any of
the Fir Tree Representatives are subject to routine examination that is not targeted towards to the Company or the Confidential Information by a governmental regulatory agency having authority to regulate such Person, as applicable, Fir Tree or such
Fir Tree Representative may disclose such Confidential Information as is requested by such agency in the course of any such examination without prior notice to the Company; provided that Fir Tree or the Fir Tree Representative, as applicable, shall
advise the regulatory agency of the confidential nature of such information. 
 (d)    The confidentiality provisions
contained in this Section 7 shall terminate on the later of the date (the “Termination Date”) that is twelve (12) months after (x) the date that Mr. Lederman or, if he or she is an employee of Fir Tree,
Mr. Lederman’s Replacement, ceases to serve on the Board or (y) the most recent date in which a New Director provides Fir Tree with Confidential Information 

8.    Securities Laws. Fir Tree acknowledges that it is aware, and will advise each Fir Tree Representative who
receives Confidential Information pursuant to Section 7(b), that applicable securities laws prohibit any Person who has received material, non-public information from purchasing or selling securities on
the basis of such information or from communicating such information to any other Person unless in compliance with such laws. Fir Tree agrees that it will not, and will use its commercially reasonable efforts to ensure that the Fir Tree
Representatives undertake not to, trade or engage in any transaction in any securities issued by the Company or any derivative with respect to Company securities, in each case while in possession of such material
non-public information or otherwise misuse material non-public information, in violation of such laws. The Company acknowledges that none of the provisions hereto shall
in any way limit Fir Tree or any Fir Tree Representative’s activities in their respective ordinary course of businesses if such activities will not violate applicable securities laws. Fir Tree maintains customary policies and procedures
designed to prevent unauthorized trading and misuse of material, non-public information in violation of applicable securities laws. 

9.    Representations and Warranties of All Parties. Each of the parties represents and warrants to the other party
that: (a) such party has all requisite power and authority to execute and deliver this Agreement and to perform its obligations hereunder, (b) this Agreement has been 

  
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duly and validly authorized, executed and delivered by it and is a valid and binding obligation of such party, enforceable against such party in accordance with its terms (subject to applicable
bankruptcy and similar laws relating to creditors’ rights and to general equity principles), and (c) this Agreement will not result in a violation of any terms or conditions of any agreements to which such Person is a party or by which
such party may otherwise be bound or of any law, rule, license, regulation, judgment, order or decree governing or affecting such party. 

10.    Representations and Warranties of Fir Tree. Fir Tree represents and warrants that, as of the date of this
Agreement: (a) Fir Tree and its Affiliates collectively Beneficially Own an aggregate of 36,379,590 shares of Common Stock, (b) Fir Tree and its Affiliates have a Synthetic Net Long Position in 7,038,874 shares of Common Stock and
(c) Fir Tree and its Affiliates have not provided or agreed to provide, and will not provide, any compensation in cash or otherwise to any New Director in connection with such New Director’s nomination and appointment to, or service on,
the Board (other than any New Director’s regular compensation as an employee of or investor in Fir Tree or its Affiliate, as applicable). 

11.    Certain Defined Terms. For purposes of this Agreement: 

(a)    The terms “Affiliate” and “Associate” shall have the respective meanings set
forth in Rule 12b-2 promulgated by the United States Securities and Exchange Commission (the “SEC”) under the Exchange Act. 

(b)    “Beneficial Ownership” means ownership of Voting Securities in a manner which provides such owner
with the right to vote or cause to be voted such Voting Securities. 
 (c)    “Initial Term” shall mean
the period commencing with the execution and delivery of this Agreement and ending on the later of (i) the date that is two years following April 12, 2017 and (ii) the date on which such New Director is next up for election at a
meeting of the Company’s shareholders. 
 (d)    “New Independent Director Criteria” shall mean
that such Person (i) has substantial expertise and experience in exploration and production in the oil and gas industry, (ii) is not a former employee or current employee of Fir Tree, (iii) has the relevant financial and business
experience to be a director of the Company and (iv) otherwise qualifies as “independent” of the Company pursuant to the applicable securities laws and stock exchange requirements. 

(e)    “Person” shall mean any individual, corporation (including not-for-profit), general or limited partnership, limited liability or unlimited liability company, joint venture, estate, trust, association, organization or other entity of any kind or nature. 

(f)    “Replacement Director Criteria” shall mean (i) with respect to a Replacement of
Mr. Lederman, that such Replacement is a member of Fir Tree with similar skills, expertise and responsibilities as Mr. Lederman and (ii) with respect to a Replacement of the New Independent Director, that such Replacement (A) has
substantial expertise and experience in exploration and production in the oil and gas industry, (B) is not a former employee or a then current employee of Fir Tree, (C) has the relevant financial and business experience to be a director of
the Company and (D) will otherwise qualify as “independent” of the Company pursuant to the applicable securities laws and stock exchange requirements. 

  
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 (g)    “Standstill End Date” shall mean (i) if the
Company shall have delivered to Fir Tree no later than thirty (30) calendar days prior to the deadline for submission for nominations for election to the Board at the 2019 Annual Meeting of Shareholders a written confirmation that
Mr. Lederman and the Independent Director (or their respective Replacements or proposed Replacements) will be nominated for election to the Board at the 2019 Annual Meeting of Shareholders, the earlier of (a) fifteen (15) calendar days
prior to the deadline for submission for nominations for election to the Board at the 2020 Annual Meeting of Shareholders pursuant to the Company’s Amended and Restated Bylaw No. 1 (the “Bylaws”) and
(b) April 19, 2020; or (ii) if the Company shall have failed to deliver the written confirmation pursuant to clause (i) of this definition, the earlier of (c) fifteen (15) calendar days prior to the deadline for submission
for nominations for election to the Board at the 2019 Annual Meeting of Shareholders and (d) April 19, 2019. 

(h)    “Synthetic Long Position” shall mean any transaction involving any option, warrant, convertible
security, stock appreciation right, or other security, contract right or derivative position or similar right (including any “swap” transaction with respect to any security, other than a broad based market basket or index), whether or not
presently exercisable, that has an exercise or conversion privilege or a settlement payment or mechanism at a price related to the value of the Voting Securities or a value determined in whole or in part with reference to, or derived in whole or in
part from, the value of the Voting Securities and that increases in value as the market price or value of the Voting Securities increases or that provides to the holder an opportunity, directly or indirectly, to profit or share in any profit derived
from any increase in the value of the Voting Securities, in each case regardless of whether (i) such derivative conveys any voting rights in such Voting Securities to such Person or any of such Person’s Affiliates, (ii) such
derivative is required to be, or capable of being, settled through delivery of such securities or (iii) such Person or any of such Person’s Affiliates may have entered into other transactions that hedge the economic effect of such
derivative. 
 (i)    “Synthetic Short Position” shall mean any transaction involving any option,
warrant, convertible security, stock appreciation right, or other security, contract right or derivative position or similar right (including any “swap” transaction with respect to any security, other than a broad based market basket or
index), whether or not presently exercisable, that has an exercise or conversion privilege or a settlement payment or mechanism at a price related to the value of the Voting Securities or a value determined in whole or in part with reference to, or
derived in whole or in part from, the value of the Voting Securities and that increases in value as the market price or value of the Voting Securities decreases or that provides to the holder an opportunity, directly or indirectly, to profit or
share in any profit derived from any decrease in the value of the Voting Securities, in each case regardless of whether (i) such derivative conveys any voting rights in such Voting Securities to such Person or any of such Person’s
Affiliates, (ii) such derivative is required to be, or capable of being, settled through delivery of such securities or (iii) such Person or any of such Person’s Affiliates may have entered into other transactions that hedge the
economic effect of such derivative. 

  
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 (j)    “Synthetic Net Long Position” shall mean the excess,
if any, of a Person’s Synthetic Long Position over such Person’s Synthetic Short Position. 

(k)    “Third Party” shall mean any Person other than the Company, Fir Tree and their respective
Affiliates and representatives. 
 (l)    “Total Net Long Position” shall mean, without duplication,
the sum of a Person’s (i) Beneficial Ownership of Voting Securities and (ii) Synthetic Net Long Position in Voting Securities. 

(m)    “Voting Securities” shall mean the Common Stock and any other securities of the Company entitled
to vote in the election of directors. 
 12.    Governing Law; Jurisdiction. This Agreement shall be governed by
and construed and enforced in accordance with the laws of Delaware without reference to the conflict of laws principles thereof. Each of the parties hereto irrevocably agrees that any legal action or proceeding with respect to this Agreement and the
rights and obligations arising hereunder, or for recognition and enforcement of any judgment in respect of this Agreement and the rights and obligations arising hereunder brought by the other party hereto or its successors or assigns, shall be
brought and determined exclusively in the Delaware Court of Chancery and any state appellate court therefrom within the State of Delaware (or, if the Delaware Court of Chancery declines to accept jurisdiction over a particular matter, any federal
court within the State of Delaware). Each of the parties hereto hereby irrevocably submits with regard to any such action or proceeding for itself and in respect of its property, generally and unconditionally, to the personal jurisdiction of the
aforesaid courts and agrees that it will not bring any action relating to this Agreement in any court other than the aforesaid courts. Each of the parties hereto hereby irrevocably waives, and agrees not to assert in any action or proceeding with
respect to this Agreement, (a) any claim that it is not personally subject to the jurisdiction of the above-named courts for any reason, (b) any claim that it or its property is exempt or immune from jurisdiction of any such court or from
any legal process commenced in such courts (whether through service of notice, attachment prior to judgment, attachment in aid of execution of judgment, execution of judgment or otherwise) and (c) to the fullest extent permitted by applicable
legal requirements, any claim that (i) the suit, action or proceeding in such court is brought in an inconvenient forum, (ii) the venue of such suit, action or proceeding is improper or (iii) this Agreement, or the subject matter
hereof, may not be enforced in or by such courts. Each party hereby irrevocably and unconditionally waives any right such party may have to a trial by jury in respect of any dispute. 

13.    No Waiver. Any waiver by any party of a breach of any provision of this Agreement shall not operate as or be
construed to be a waiver of any other breach of such provision or of any breach of any other provision of this Agreement. The failure of a party to insist upon strict adherence to any term of this Agreement on one or more occasions shall not be
considered a waiver or deprive that party of the right thereafter to insist upon strict adherence to that term or any other term of this Agreement. 

  
 11 

 14.    Entire Agreement. This Agreement contains the entire
understanding of the parties with respect to the subject matter hereof and may be amended only by an agreement in writing executed by the parties hereto. 

15.    Notices. All notices, consents, requests, instructions, approvals and other communications provided for
herein and all legal process in regard hereto shall be in writing and shall be deemed validly given, made or served, if (a) given by email, when such email is sent to the email address set forth below during normal business hours and the
appropriate confirmation is received or (b) if given by any other means, when actually received during normal business hours at the address specified in this subsection: 
  

			
	 if to the Company:

		
		 	 Ultra Petroleum Corp.

400 N. Sam Houston Parkway E., Suite 1200

		 	 Houston, Texas 77060

		 	 Attention:    Garrett B. Smith

		 	 Email:          gsmith@ultrapetroleum.com

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

		
		 	 Kirkland & Ellis LLP

601 Lexington Avenue

		 	 New York, NY 10022

		 	 Attention:    Sarkis Jebejian

		 	
                    David
Feirstein

		 	 Email:         sarkis.jebejian@kirkland.com

		 	
                    
david.feirstein@kirkland.com

	
	 if to Fir Tree:

		
		 	 Fir Tree Capital Management LP

55 W 46th Street

		 	 New York, NY 10036

		 	 Attention:    Brian Meyer

		 	 Email:          bmeyer@firtree.com

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

		
		 	 Schulte Roth & Zabel LLP

919 Third Avenue

		 	 New York, New York 10022

		 	 Attention:    Eleazer Klein

		 	 Email:          eleazer.klein@srz.com

 16.    Severability. If any provision of this Agreement shall be held by any court
of competent jurisdiction to be illegal, void or unenforceable, such provision shall be of no force and effect, but the illegality or unenforceability of such provision shall have no effect upon the legality or enforceability of any other provision
of this Agreement. 

  
 12 

 17.    Counterparts. This Agreement may be executed in two or more
counterparts, which together shall constitute a single agreement. 
 18.    Successors and Assigns. This
Agreement shall not be assignable by any of the parties to this Agreement. This Agreement, however, shall be binding on successors of the parties hereto. 

19.    No Third Party Beneficiaries. This Agreement is solely for the benefit of the parties hereto and is not
enforceable by any other Persons. 
 20.    Amendments. This Agreement may only be amended pursuant to a written
agreement executed by Fir Tree and the Company. 
 21.    Interpretation and Construction. Each of the parties
hereto acknowledges that it has been represented by counsel of its choice throughout all negotiations that have preceded the execution of this Agreement, and that it has executed the same with the advice of said independent counsel. Each party and
its counsel cooperated and participated in the drafting and preparation of this Agreement and the documents referred to herein, and any and all drafts relating thereto exchanged among the parties shall be deemed the work product of all of the
parties and may not be construed against any party by reason of its drafting or preparation. Accordingly, any rule of law or any legal decision that would require interpretation of any ambiguities in this Agreement against any party that drafted or
prepared it is of no application and is hereby expressly waived by each of the parties hereto, and any controversy over interpretations of this Agreement shall be decided without regards to events of drafting or preparation. The section headings
contained in this Agreement are for reference purposes only and shall not affect in any way the meaning or interpretation of this Agreement. The term “including” shall be deemed to mean “including without limitation” in all
instances. 
 22.    Specific Performance. Each of the parties hereto acknowledges and agrees that
irreparable injury to the other party hereto would occur in the event any of the provisions of this Agreement were not performed in accordance with their specific terms or were otherwise breached and that such injury would not be adequately
compensable by the remedies available at law (including the payment of money damages). It is accordingly agreed that the Company, on the one hand, and Fir Tree, on the other hand (the “Moving Party”), shall each be entitled to
specific enforcement of, and injunctive relief to prevent any violation of, the terms hereof, and the other party hereto will not take action, directly or indirectly, in opposition to the Moving Party seeking such relief on the grounds that any
other remedy or relief is available at law or in equity. This Section 22 is not the exclusive remedy for any violation of this Agreement. 

[Signature Pages Follow] 

  
 13 

 IN WITNESS WHEREOF, each of the parties hereto has executed this Agreement, or caused the same to
be executed by its duly authorized representative as of the date first above written. 
  

			
	ULTRA PETROLEUM CORP.

 
			
		
	By:	 	  

	Name:	 	
	Title:	 	

 
			
	
	FIR TREE CAPITAL MANAGEMENT LP

 
			
		
	By:	 	  

	Name:	 	
	Title:	 	

 [Signature Page to Cooperation Agreement] 

 Press Release 

[See attached.]Exhibit
10.1

 

Memorandum
of Understanding (MOU)

 

This
Memorandum of understanding (“MOU”) is intended to set forth our agreement with respect to an arrangement pursuant
to which Medical Innovation Holdings Inc. (“MIHI”) and Advanced Medical pricing Solutions (“AMPS”) will
agree to work together in several initiatives, both organizations are pursuing to enhance their revenue streams, provide extended
client services, and become more competitive in a crowded and growing healthcare marketplace.

 

Role
and Responsibilities

 

Medical Innovation
Holdings Inc. is a public company under the symbol MIHI. Our core business is to deliver state of the art telemedicine services
to patients via our comprehensive integrated patient care platform. We are also pursuing other markets that include developing
a health care sharing organization (HCSO) targeting the 58 million Hispanics in the USA.

 

Advanced Medical Pricing
Solutions (AMPS) provides market leading healthcare cost containment solutions for various entities that serve and utilize the
health care ecosystem. Their mission is to provide services designed and developed to help bring their clients attain their goals
of materially reducing healthcare costs while keeping their members satisfied with quality healthcare benefits and optimized financial
outcomes.

 

It
is contemplated that the two companies will work together in their core areas to jointly bring solutions to the market that greatly
expand the use of telemedicine as an outreach/ access tool and as a cost containment tool. MIHI’s HCSO will also seek to
utilize AMPS’ national healthcare cost containment network via its healthcare navigators to service the coverage requirements
of MIHI members enrolled in the HCSO. This combination allows both firms to accelerate the time to market while providing a much
needed service.

 

Both
firms understand that working together can act as a catalyst that changes the healthcare landscapes for MIHI and AMPS clients.
Utilizing AMPS back and front end services will provide MIHI with a competitive advantage when it comes to price and access. AMPS
have a series of additional services that MIHI will roll out as the market dictates and as the membership base grows.

 

/s/
Michael Dendy

 

(AMPS
Chief Executive Officer)

 

/s/
Arturo Jake Sanchez

 

(MIHI
Chief Executive Officer)

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