Document:

Form of Indemnification Agreement for Officers and Directors

 Exhibit 10.10 
 INDEMNIFICATION AGREEMENT 
 This Indemnification Agreement (this
“Agreement”) is made and entered into as of the     day of             , 2011, by and between Luca Technologies Inc., a Delaware corporation (the
“Company”) and
                                        
(“Indemnitee”). 
 W I T N E S S E T H: 
 WHEREAS, highly competent persons have become more reluctant to serve publicly-held corporations as directors or in other capacities unless they are provided with adequate protection through insurance or
adequate indemnification against risks of claims and actions against them arising out of their service to and activities on behalf of the corporation. 
 WHEREAS, the Board of Directors of the Company (the “Board”) has determined that, in order to attract and retain qualified individuals, the Company will attempt to maintain on an ongoing
basis, at its sole expense, liability insurance to protect persons serving the Company and its subsidiaries from certain liabilities. Although the furnishing of such insurance has been a customary and widespread practice among United States-based
corporations and other business enterprises, the Company believes that, given current market conditions and trends, such insurance may be available to it in the future only at higher premiums and with more exclusions. At the same time, directors,
officers, and other persons in service to corporations or business enterprises are being increasingly subjected to expensive and time-consuming litigation relating to, among other things, matters that traditionally would have been brought only
against the Company or business enterprise itself. 
 WHEREAS, the Bylaws of the Company provide that the Company shall
indemnify and advance expenses to all directors and officers of the Company in the manner set forth therein and to the fullest extent permitted by applicable law, and the Company’s Certificate of Incorporation provides for limitation of
liability for directors. In addition, Indemnitee may be entitled to indemnification pursuant to the General Corporation Law of the State of Delaware (“DGCL”). The Bylaws of the Company and the DGCL expressly provide that the
indemnification provisions set forth therein are not exclusive, and thereby contemplate that contracts may be entered into between the Company and members of the Board, officers and other persons with respect to indemnification. 

WHEREAS, the uncertainties relating to such insurance and to indemnification have increased the difficulty of attracting and retaining
such persons. 
 WHEREAS, the Board has determined that the increased difficulty in attracting and retaining such persons is
detrimental to the best interests of the Company’s stockholders and that the Company should act to assure such persons that there will be increased certainty of such protection in the future. 

WHEREAS, it is reasonable, prudent and necessary for the Company contractually to obligate itself to indemnify, and to advance expenses
on behalf of, such persons to the fullest extent permitted by applicable law so that they will serve or continue to serve the Company free from undue concern that they will not be so indemnified. 

 WHEREAS, this Agreement is a supplement to and in furtherance of the Certificate of
Incorporation and Bylaws of the Company and any resolutions adopted pursuant thereto and shall not be deemed a substitute therefor, nor to diminish or abrogate any rights of Indemnitee thereunder. 

WHEREAS, Indemnitee does not regard the protection available under the Company’s Certificate of Incorporation and Bylaws and
insurance as adequate in the present circumstances, and may not be willing to serve as an officer or director of the Company without adequate protection, and the Company desires Indemnitee to serve in such capacity. Indemnitee is willing to serve,
continue to serve and to take on additional service for or on behalf of the Company on the condition that he be so indemnified. 

NOW, THEREFORE, in consideration of the premises and the covenants contained herein, the Company and Indemnitee do hereby covenant and
agree as follows: 
 ARTICLE 1 
 CERTAIN DEFINITIONS
 (a) As used in this Agreement: 

“Change of Control” means any one of the following circumstances occurring after the date hereof: (i) there shall
have occurred an event required to be reported with respect to the Company in response to Item 6(e) of Schedule 14A of Regulation 14A (or in response to any similar item or any similar schedule or form) under the Exchange Act, regardless of
whether the Company is then subject to such reporting requirement; (ii) any “person” or “group” (as such terms are used in Sections 13(d) and 14(d) of the Exchange Act) shall have become, without prior approval of the
Company’s Board by approval of at least a majority of the Continuing Directors, the “beneficial owner” (as defined in Rule 13d-3 under the Exchange Act), directly or indirectly, of securities of the Company representing 15% or more of
the combined voting power of the Company’s then outstanding voting securities (provided that, for purposes of this clause (ii), the term “person” shall exclude (x) the Company, (y) any trustee or other fiduciary holding
securities under an employee benefit plan of the Company, and (z) any corporation owned, directly or indirectly, by the stockholders of the Company in substantially the same proportions as their ownership of stock of the Company);
(iii) there occurs a merger or consolidation of the Company with any other entity, other than a merger or consolidation which would result in the voting securities of the Company outstanding immediately prior to such merger or consolidation
continuing to represent (either by remaining outstanding or by being converted into voting securities of the surviving entity) more than 51% of the combined voting power of the voting securities of the surviving entity outstanding immediately after
such merger or consolidation and with the power to elect at least a majority of the board of directors or other governing body of such surviving entity; (iv) all or substantially all the assets of the Company are sold or disposed of in a
transaction or series of related transactions; (v) the approval by the stockholders of the Company of a complete liquidation of the Company; or (vi) the Continuing Directors cease for any reason to constitute at least a majority of the
members of the Board. 
 “Continuing Director” means (i) each director on the Board on the date hereof or
(ii) any new director whose election or nomination for election by the Company’s stockholders was 

  
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approved by a vote of at least a majority of the directors then still in office who were directors on the date hereof or whose election or nomination was so approved. 

“Corporate Status” means the status of a person who is or was a director, officer, trustee, general partner, managing
member, fiduciary, board of directors’ committee member, employee or agent of the Company or of any other Enterprise. 

“Disinterested Director” means a director of the Company who is not and was not a party to the Proceeding in respect of
which indemnification is sought by Indemnitee. 
 “Enterprise” means the Company and any other corporation,
limited liability company, partnership, joint venture, trust, employee benefit plan or other enterprise of which Indemnitee is or was serving at the request of the Company as a director, officer, trustee, general partner, managing member, fiduciary,
board of directors’ committee member, employee or agent. 
 “ERISA” means the Employee Retirement Income
Security Act of 1974, as amended. 
 “Exchange Act” means the Securities Exchange Act of 1934, as amended.

 “Expenses” means all direct and indirect costs (including attorneys’ fees, retainers, court costs,
transcripts, fees of experts, witness fees, travel expenses, duplicating costs, printing and binding costs, telephone charges, postage, delivery service fees, and all other disbursements or expenses) reasonably incurred in connection with
(i) prosecuting, defending, preparing to prosecute or defend, investigating, being or preparing to be a witness in, or otherwise participating in, a Proceeding or (ii) establishing or enforcing a right to indemnification under this
Agreement, the Company’s Bylaws, applicable law or otherwise. Expenses also shall include Expenses incurred in connection with any appeal resulting from any Proceeding, including the premium, security for, and other costs relating to any cost
bond, supersedeas bond, or other appeal bond or its equivalent. For the avoidance of doubt, Expenses, however, shall not include any Liabilities. 
 “Independent Counsel” means a law firm, or a member of a law firm, that is experienced in matters of corporate law and neither currently is, nor in the five years previous to its
selection or appointment has been, retained to represent (i) the Company or Indemnitee in any matter material to either such party (other than with respect to matters concerning Indemnitee under this Agreement or of other indemnitees under
similar indemnification agreements) or (ii) any other party to the Proceeding giving rise to a claim for indemnification hereunder. Notwithstanding the foregoing, the term “Independent Counsel” shall not include any person who, under
the applicable standards of professional conduct then prevailing, would have a conflict of interest in representing either the Company or Indemnitee in an action to determine Indemnitee’s rights under this Agreement. 

“Liabilities” means any losses or liabilities, including any judgments, fines, ERISA excise taxes and penalties,
penalties and amounts paid in settlement, arising out of or in connection with any Proceeding (including all interest, assessments and other charges paid or payable in connection with or in respect of any such judgments, fines, ERISA excise taxes
and penalties, penalties or amounts paid in settlement). 

  
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 “Proceeding” means any threatened, pending or completed action, derivative
action, suit, claim, counterclaim, cross claim, arbitration, alternate dispute resolution mechanism, investigation, inquiry, administrative hearing or any other actual, threatened or completed proceeding, whether civil (including intentional and
unintentional tort claims), criminal, administrative or investigative, including any appeal therefrom, and whether instituted by or on behalf of the Company or any other party, or any inquiry or investigation that Indemnitee in good faith believes
might lead to the institution of any such action, suit or other proceeding hereinabove listed in which Indemnitee was, is or will be involved as a party, potential party, non-party witness or otherwise by reason of any Corporate Status of
Indemnitee, or by reason of any action taken (or failure to act) by him or her or of any action (or failure to act) on his or her part while serving in any Corporate Status. 
 (b) For the purposes of this Agreement: 
 References to “Company” shall
include, in addition to the resulting or surviving corporation, any constituent corporation (including any constituent of a constituent) absorbed in a consolidation or merger which, if its separate existence had continued, would have had power and
authority to indemnify its directors, officers, employees or agents, so that if Indemnitee is or was a director, officer, employee, or agent of such constituent corporation or is or was serving at the request of such constituent corporation as a
director, officer, employee, or agent of another corporation, partnership, joint venture, trust or other enterprise, then Indemnitee shall stand in the same position under the provisions of this Agreement with respect to the resulting or surviving
corporation as Indemnitee would have with respect to such constituent corporation if its separate existence had continued. 

Reference to “other enterprise” shall include employee benefit plans; references to “fines” shall include any excise
tax assessed with respect to any employee benefit plan; references to “serving at the request of the Company” shall include any service as a director, officer, employee or agent of the Company which imposes duties on, or involves services
by, such director, officer, employee or agent with respect to an employee benefit plan, its participants or beneficiaries; and a person who acted in good faith and in a manner he reasonably believed to be in the best interests of the participants
and beneficiaries of an employee benefit plan shall be deemed to have acted in a manner “not opposed to the best interests of the Company” as referred to in this Agreement. 

Reference to “including” shall mean “including, without limitation,” regardless of whether the words “without
limitation” actually appear, references to the words “herein,” “hereof” and “hereunder” and other words of similar import shall refer to this Agreement as a whole and not to any particular paragraph, subparagraph,
section, subsection or other subdivision. 
 ARTICLE 2 

SERVICES BY INDEMNITEE
 Section 2.01. Services by Indemnitee. Indemnitee hereby agrees to serve or continue to serve, at the will of the Company, as a director, officer or key employee of the Company, for so

  
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long as Indemnitee is duly elected or appointed or until Indemnitee tenders his or her resignation or is removed. 
 ARTICLE 3 
 INDEMNIFICATION

Section 3.01. General. (a) The Company hereby agrees to and shall indemnify Indemnitee and hold Indemnitee harmless from and
against any and all Expenses and Liabilities, in either case, actually and reasonably incurred by Indemnitee or on Indemnitee’s behalf by reason of Indemnitee’s Corporate Status, to the fullest extent permitted by applicable law. The
Company’s indemnification obligations set forth in this Section 3.01 shall apply (i) in respect of Indemnitee’s past, present and future service in any Corporate Status and (ii) regardless of whether Indemnitee is
serving in any Corporate Status at the time any such Expense or Liability is incurred. 
 For purposes of this Agreement, the
meaning of the phrase “to the fullest extent permitted by applicable law” shall include, but not be limited to: 
 (i)
to the fullest extent permitted by any provision of the DGCL, or the corresponding provision of any successor statute, and 

(ii) to the fullest extent authorized or permitted by any amendments to or replacements of the DGCL adopted after the date of this
Agreement that increase the extent to which a corporation may indemnify its officers and directors. 
 (b) Witness
Expenses. Notwithstanding any other provision of this Agreement, to the extent that Indemnitee is, by reason of his or her Corporate Status, a witness in any Proceeding to which Indemnitee is not a party, he shall be indemnified against all
Expenses actually and reasonably incurred by Indemnitee or on his or her behalf in connection therewith. 
 (c) Expenses as a
Party Where Wholly or Partly Successful. Notwithstanding any other provisions of this Agreement, to the fullest extent permitted by applicable law, to the extent that Indemnitee is a party to (or a participant in) and is successful, on the
merits or otherwise, in any Proceeding or in defense of any claim, issue or matter therein, in whole or in part, the Company shall indemnify Indemnitee against all Expenses actually and reasonably incurred by him or her in connection therewith. If
Indemnitee is not wholly successful in such Proceeding, but is successful, on the merits or otherwise, as to one or more but less than all claims, issues or matters in such Proceeding, the Company shall, to the fullest extent permitted by applicable
law, indemnify Indemnitee against all Expenses actually and reasonably incurred by Indemnitee or on his or her behalf in connection with each successfully resolved claim, issue or matter. For purposes of this Section and without limitation, the
termination of any claim, issue or matter in such a Proceeding by dismissal, with or without prejudice, shall be deemed to be a successful result as to such claim, issue or matter. 

Section 3.02. Exclusions. Notwithstanding any provision of this Agreement and unless Indemnitee ultimately is successful on the
merits with respect to any such claim, the Company shall not be obligated under this Agreement to make any indemnity in connection with any claim made against Indemnitee: 

  
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 (a) for (i) an accounting of profits made from the purchase and sale (or sale and
purchase) by Indemnitee of securities of the Company within the meaning of Section 16(b) of the Exchange Act or similar provisions of state statutory law or common law or (ii) any reimbursement of the Company by Indemnitee of any bonus or
other incentive-based or equity-based compensation or of any profits realized by Indemnitee from the sale of securities of the Company, as required in each case under the Exchange Act (including any such reimbursements that arise from an accounting
restatement of the Company pursuant to Section 304 of the Sarbanes-Oxley Act of 2002 (the “Sarbanes-Oxley Act”), or the payment to the Company of profits arising from the purchase and sale by Indemnitee of securities in
violation of Section 306 of the Sarbanes-Oxley Act); or 
 (b) except as otherwise provided in Section 6.01(e),
prior to a Change of Control, in connection with any Proceeding (or any part of any Proceeding) initiated by Indemnitee, including any Proceeding (or any part of any Proceeding) initiated by Indemnitee against the Company or its directors, officers,
employees or other indemnitees, unless (i) the Board authorized the Proceeding (or any part of any Proceeding) prior to its initiation or (ii) the Company provides the indemnification, in its sole discretion, pursuant to the powers vested
in the Company under applicable law. 
 ARTICLE 4 
 ADVANCEMENT OF EXPENSES; DEFENSE OF CLAIMS
 Section 4.01. Advances.
Notwithstanding any provision of this Agreement to the contrary, the Company shall advance any Expenses actually and reasonably incurred by Indemnitee in connection with any Proceeding within 20 days after the receipt by the Company of each
statement requesting such advance from time to time, whether prior to or after final disposition of any Proceeding. Advances shall be unsecured and interest free. Advances shall be made without regard to Indemnitee’s ability to repay such
amounts and without regard to Indemnitee’s ultimate entitlement to indemnification under the other provisions of this Agreement. Advances shall include any and all reasonable Expenses incurred pursuing an action to enforce this right of
advancement, including Expenses incurred preparing and forwarding statements to the Company to support the advances claimed. 

Section 4.02. Repayment of Advances or Other Expenses. Indemnitee agrees that Indemnitee shall reimburse the Company for all
Expenses advanced by the Company pursuant to Section 4.01, in the event and only to the extent that it shall be determined by final judgment or other final adjudication under the provisions of any applicable law (as to which all rights
of appeal therefrom have been exhausted or lapsed) that Indemnitee is not entitled to be indemnified by the Company for such Expenses. 
 Section 4.03. Defense of Claims. The Company will be entitled to participate in the Proceeding at its own expense. The Company shall not settle any action, claim or Proceeding (in whole or in part)
which would impose any Expense, judgment, fine, penalty or limitation on Indemnitee without Indemnitee’s prior written consent, such consent not to be unreasonably withheld. Indemnitee shall not settle any action, claim or Proceeding (in whole
or in part) which would impose any Expense, judgment, fine, penalty or limitation on the Company without the Company’s prior written consent, such consent not to be unreasonably withheld. 

  
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 ARTICLE 5 
 PROCEDURES FOR NOTIFICATION OF AND DETERMINATION OF ENTITLEMENT TO 

INDEMNIFICATION

Section 5.01. Notification; Request For Indemnification. (a) As soon as reasonably practicable after receipt by Indemnitee of
written notice that he is a party to or a participant (as a witness or otherwise) in any Proceeding or of any other matter in respect of which Indemnitee intends to seek indemnification or advancement of Expenses hereunder, Indemnitee shall provide
to the Company written notice thereof, including the nature of and the facts underlying the Proceeding. The omission by Indemnitee to so notify the Company will not relieve the Company from any liability which it may have to Indemnitee hereunder or
otherwise. 
 (b) To obtain indemnification under this Agreement, Indemnitee shall deliver to the Company a written request for
indemnification, including therewith such information as is reasonably available to Indemnitee and reasonably necessary to determine Indemnitee’s entitlement to indemnification hereunder. Such request(s) may be delivered from time to time and
at such time(s) as Indemnitee deems appropriate in his or her sole discretion. Indemnitee’s entitlement to indemnification shall be determined according to Section 5.02 and applicable law. 

Section 5.02. Determination of Entitlement. (a) Where there has been a written request by Indemnitee for indemnification
pursuant to Section 5.01(b), then as soon as is reasonably practicable (but in any event not later than 60 days) after final disposition of the relevant Proceeding, a determination, if required by applicable law, with respect to
Indemnitee’s entitlement thereto shall be made in the specific case: (i) if a Change of Control shall not have occurred, (A) by a majority vote of the Disinterested Directors, even though less than a quorum of the Board, (B) by a
committee of Disinterested Directors designated by a majority vote of the Disinterested Directors, even though less than a quorum of the Board, (C) if there are no such Disinterested Directors or, if such Disinterested Directors so direct, by
Independent Counsel in a written opinion to the Board, a copy of which shall be delivered to Indemnitee; or (ii) if a Change of Control shall have occurred, by Independent Counsel in a written opinion to the Board, a copy of which shall be
delivered to Indemnitee. If it is so determined that Indemnitee is entitled to indemnification, payment to Indemnitee shall be made within 10 days after such determination. Indemnitee shall reasonably cooperate with the person, persons or entity
making such determination with respect to Indemnitee’s entitlement to indemnification, including providing to such person, persons or entity upon reasonable advance request any documentation or information which is not privileged or otherwise
protected from disclosure and which is reasonably available to Indemnitee and reasonably necessary to such determination. Any costs or expenses (including attorneys’ fees and disbursements) actually and reasonably incurred by Indemnitee in so
cooperating with the person, persons or entity making such determination shall be borne by the Company (irrespective of the determination as to Indemnitee’s entitlement to indemnification). 

(b) If entitlement to indemnification is to be determined by Independent Counsel pursuant to Section 5.02(a)(ii), such
Independent Counsel shall be selected by Indemnitee, and Indemnitee shall give written notice to the Company advising it of the identity of the Independent Counsel so selected. If entitlement to indemnification is to be determined by Independent
Counsel pursuant to Section 5.02(a)(i)(C) (or if Indemnitee requests that such 

  
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selection be made by the Board), such Independent Counsel shall be selected by the Company in which case the Company shall give written notice to Indemnitee advising him or her of the identity of
the Independent Counsel so selected. In either event, Indemnitee or the Company, as the case may be, may, within 10 days after such written notice of selection shall have been received, deliver to the Company or to Indemnitee, as the case may be, a
written objection to such selection; provided, however, that such objection may be asserted only on the ground that the Independent Counsel so selected does not meet the requirements of “Independent Counsel” as defined in
Article 1, and the objection shall set forth with particularity the factual basis of such assertion. Absent a proper and timely objection, the person so selected shall act as Independent Counsel. If such written objection is so made and
substantiated, the Independent Counsel so selected may not serve as Independent Counsel unless and until such objection is withdrawn or a court of competent jurisdiction has determined that such objection is without merit. If, within 20 days after
the later of submission by Indemnitee of a written request for indemnification pursuant to Section 5.01(b) and the final disposition of the Proceeding, no Independent Counsel shall have been selected and not objected to, either the
Company or Indemnitee may petition a court of competent jurisdiction for resolution of any objection which shall have been made by the Company or Indemnitee to the other’s selection of Independent Counsel and/or for the appointment as
Independent Counsel of a person selected by the court or by such other person as the court shall designate, and the person with respect to whom all objections are so resolved or the person so appointed shall act as Independent Counsel under
Section 5.02(a) hereof. Upon the due commencement of any judicial proceeding or arbitration pursuant to Section 6.01(a), the Independent Counsel shall be discharged and relieved of any further responsibility in such capacity
(subject to the applicable standards of professional conduct then prevailing). 
 (c) The Company agrees to pay the reasonable
fees and expenses of any Independent Counsel serving under this Agreement. 
 Section 5.03. Presumptions and Burdens of
Proof; Effect of Certain Proceedings. (a) In making any determination with respect to entitlement to indemnification hereunder, the person or persons or entity making such determination shall, to the fullest extent not prohibited by law,
presume that Indemnitee is entitled to indemnification under this Agreement if Indemnitee has submitted a request for indemnification in accordance with Section 5.01(b), and the Company shall, to the fullest extent not prohibited by law,
have the burden of proof to overcome that presumption in connection with the making by any person, persons or entity of any determination contrary to that presumption. Neither the failure of any person, persons or entity to have made a determination
prior to the commencement of any action pursuant to this Agreement that indemnification is proper in the circumstances because Indemnitee has met the applicable standard of conduct, nor an actual determination by any person, persons or entity that
Indemnitee has not met such applicable standard of conduct, shall be a defense to the action or create a presumption that Indemnitee has not met the applicable standard of conduct. 

(b) If the person, persons or entity empowered or selected under Section 5.02 to determine whether Indemnitee is entitled to
indemnification shall not have made a determination within the 60-day period referred to in Section 5.02(a), the requisite determination of entitlement to indemnification shall, to the fullest extent not prohibited by law, be deemed to
have been made and Indemnitee shall be entitled to such indemnification, absent (i) a misstatement by 

  
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Indemnitee of a material fact, or an omission of a material fact necessary to make Indemnitee’s statement not materially misleading, in connection with the request for indemnification, or
(ii) a prohibition of such indemnification under applicable law; provided, however, that such 60-day period may be extended for a reasonable time, not to exceed an additional 30 days, if the person, persons or entity making the
determination with respect to entitlement to indemnification in good faith requires such additional time for the obtaining or evaluating of documentation and/or information relating thereto. 

(c) The termination of any Proceeding or of any claim, issue or matter therein, by judgment, order, settlement or conviction, or upon a
plea of nolo contendere or its equivalent, shall not (except as otherwise expressly provided in this Agreement) of itself adversely affect the right of Indemnitee to indemnification or create a presumption that Indemnitee did not act in good
faith and in a manner which he reasonably believed to be in or not opposed to the best interests of the Company or, with respect to any criminal Proceeding, that Indemnitee had reasonable cause to believe that his or her conduct was unlawful.

 (d) For purposes of any determination of good faith, Indemnitee shall be deemed to have acted in good faith if
Indemnitee’s action is in good faith reliance on the records or books of account of any Enterprise, including financial statements, or on information supplied to Indemnitee by the officers of such Enterprise in the course of their duties, or on
the advice of legal counsel for such Enterprise or on information or records given or reports made to such Enterprise by an independent certified public accountant or by an appraiser or other expert selected by such Enterprise. The provisions of
this Section 5.03(d) shall not be deemed to be exclusive or to limit in any way the other circumstances in which Indemnitee may be deemed or found to have met the applicable standard of conduct set forth in this Agreement. 

(e) The knowledge and/or actions, or failure to act, of any other director, trustee, partner, managing member, fiduciary, officer, agent
or employee of any Enterprise shall not be imputed to Indemnitee for purposes of determining any right to indemnification under this Agreement. 
 ARTICLE 6 
 REMEDIES OF INDEMNITEE 

Section 6.01. Adjudication or Arbitration. (a) In the event of any dispute between Indemnitee and the Company hereunder as to
entitlement to indemnification or advancement of Expenses (including where (i) a determination is made pursuant to Section 5.02 that Indemnitee is not entitled to indemnification under this Agreement, (ii) advancement of
Expenses is not timely made pursuant to Section 4.01, (iii) payment of indemnification pursuant to Section 3.01 is not made within 10 days after a determination has been made that Indemnitee is entitled to
indemnification, (iv) no determination as to entitlement to indemnification is timely made pursuant to Section 5.02 and no payment of indemnification is made within 10 days after entitlement is deemed to have been determined
pursuant to Section 5.03(b) or (v) a contribution payment is not made in a timely manner pursuant to Section 8.04), then Indemnitee shall be entitled to an adjudication by a court of his or her entitlement to such
indemnification, contribution or advancement. Alternatively, in such case, Indemnitee, at his or her option, may seek an award in arbitration to be conducted by a single arbitrator pursuant to the Commercial 

  
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Arbitration Rules of the American Arbitration Association. The Company shall not oppose Indemnitee’s right to seek any such adjudication or award in arbitration. 

(b) In the event that a determination shall have been made pursuant to Section 5.02(a) that Indemnitee is not entitled to
indemnification, any judicial proceeding or arbitration commenced pursuant to this Section 6.01 shall be conducted in all respects as a de novo trial, or arbitration, on the merits, and Indemnitee shall not be prejudiced by reason
of that adverse determination. In any judicial proceeding or arbitration commenced pursuant to this Section 6.01 the Company shall have the burden of proving Indemnitee is not entitled to indemnification or advancement of Expenses, as
the case may be, and the Company may not refer to or introduce into evidence any determination pursuant to Section 5.02(a) adverse to Indemnitee for any purpose. If Indemnitee commences a judicial proceeding or arbitration pursuant to
this Section 6.01, Indemnitee shall not be required to reimburse the Company for any advances pursuant to Section 4.02 until a final determination is made with respect to Indemnitee’s entitlement to indemnification (as
to which all rights of appeal have been exhausted or lapsed). 
 (c) If a determination shall have been made pursuant to
Section 5.02(a) that Indemnitee is entitled to indemnification, the Company shall be bound by such determination in any judicial proceeding or arbitration commenced pursuant to this Section 6.01, absent (i) a
misstatement by Indemnitee of a material fact, or an omission of a material fact necessary to make Indemnitee’s statement not materially misleading, in connection with the request for indemnification, or (ii) a prohibition of such
indemnification under applicable law. 
 (d) The Company shall be precluded from asserting in any judicial proceeding or
arbitration commenced pursuant to this Section 6.01 that the procedures and presumptions of this Agreement are not valid, binding and enforceable and shall stipulate in any such court or before any such arbitrator that the Company is
bound by all the provisions of this Agreement. 
 (e) The Company shall indemnify Indemnitee to the fullest extent permitted by
law against all Expenses and, if requested by Indemnitee, shall (within 10 days after the Company’s receipt of such written request) advance such Expenses to Indemnitee, which are reasonably incurred by Indemnitee in connection with any
judicial proceeding or arbitration brought by Indemnitee for (i) indemnification or advances of Expenses by the Company (or otherwise for the enforcement, interpretation or defense of his or her rights) under this Agreement or any other
agreement, including any other indemnification, contribution or advancement agreement, or any provision of the Company’s Certificate of Incorporation or Bylaws now or hereafter in effect or (ii) recovery or advances under any
directors’ and officers’ liability insurance policy maintained by the Company, regardless of whether Indemnitee ultimately is determined to be entitled to such indemnification, contribution, advancement or insurance recovery, as the case
may be. 
 ARTICLE 7 
 DIRECTORS’ AND OFFICERS’ LIABILITY INSURANCE 
 Section 7.01. D&O
Liability Insurance. The Company shall obtain and maintain a policy or policies of insurance (“D&O Liability Insurance”) with reputable insurance companies providing liability insurance for directors and officers of the
Company in their capacities as such (and for any capacity in which any director or officer of the Company serves 

  
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any other Enterprise at the request of the Company), in respect of acts or omissions occurring while serving in such capacity, on terms with respect to coverage and amount (including with respect
to the payment of Expenses) no less favorable than those of such policy in effect on the date hereof except for any changes approved by the Board prior to a Change of Control; provided that such coverage and amounts are available on
commercially reasonable terms. 
 Section 7.02. Evidence of Coverage. Upon request by Indemnitee, the Company shall
provide copies of all policies of D&O Liability Insurance obtained and maintained in accordance with Section 7.01. The Company shall promptly notify Indemnitee of any material changes in such insurance coverage. 

ARTICLE 8 

MISCELLANEOUS

Section 8.01. Nonexclusivity of Rights. The rights of indemnification, contribution and advancement of Expenses as provided by
this Agreement shall not be deemed exclusive of any other rights to which Indemnitee may at any time be entitled to under applicable law, the Company’s Certificate of Incorporation, the Company’s Bylaws, any agreement, a vote of
stockholders or a resolution of directors, or otherwise. No right or remedy herein conferred is intended to be exclusive of any other right or remedy, and every other right and remedy shall be cumulative and in addition to every other right and
remedy given hereunder or now or hereafter existing at law or in equity or otherwise. The assertion or employment of any right or remedy hereunder, or otherwise, shall not prevent the concurrent assertion or employment of any other right or remedy.

 Section 8.02. Insurance and Subrogation. (a) Indemnitee shall be covered by the Company’s D&O Liability
Insurance in accordance with its or their terms to the maximum extent of the coverage available for any director or officer under such policy or policies. If, at the time the Company receives notice of a claim hereunder, the Company has D&O
Liability Insurance in effect, the Company shall give prompt notice of such Proceeding to the insurers in accordance with the procedures set forth in the respective policies. The Company shall thereafter take all necessary or desirable action to
cause such insurers to pay, on behalf of Indemnitee, all amounts payable as a result of such Proceeding in accordance with the terms of such policies. The failure or refusal of any such insurer to pay any such amount shall not affect or impair the
obligations of the Company under this Agreement. 
 (b) In the event of any payment under this Agreement, the Company shall be
subrogated to the extent of such payment to all of the rights of recovery of Indemnitee, who shall execute all papers required and take all action necessary to secure such rights, including execution of such documents as are necessary to enable the
Company to bring suit to enforce such rights. 
 (c) The Company shall not be liable under this Agreement to make any payment of
amounts otherwise indemnifiable (or for which advancement is provided) hereunder if and to the extent that Indemnitee has actually received such payment under any insurance policy or other indemnity provision. 

  
 11 

 Section 8.03. Amounts Received from Non-Company Sources. The Company’s
obligation to indemnify or advance Expenses hereunder to Indemnitee who is or was serving at the request of the Company as a director, officer, trustee, partner, managing member, fiduciary, board of directors’ committee member, employee or
agent of any other Enterprise shall be reduced by any amount Indemnitee has actually received as indemnification or advancement of Expenses from such Enterprise. 
 Section 8.04. Contribution. To the fullest extent permissible under applicable law, if the indemnification provided for in this Agreement is unavailable to Indemnitee for any reason whatsoever, the
Company, in lieu of indemnifying Indemnitee, shall contribute to the amount incurred by Indemnitee, whether for judgments, fines, penalties, excise taxes, amounts paid or to be paid in settlement and/or for Expenses, in connection with any claim
relating to an indemnifiable event under this Agreement, in such proportion as is deemed fair and reasonable in light of all of the circumstances of such Proceeding in order to reflect (i) the relative benefits received by the Company and
Indemnitee as a result of the event(s) and/or transaction(s) giving rise to such Proceeding; and/or (ii) the relative fault of the Company (and its directors, officers, employees and agents) and Indemnitee in connection with such event(s)
and/or transaction(s). 
 Section 8.05. Amendment. This Agreement may not be modified or amended except by a written
instrument executed by or on behalf of each of the parties hereto. No amendment, alteration or repeal of this Agreement or of any provision hereof shall limit, restrict or reduce any right of Indemnitee under this Agreement in respect of any act or
omission, or any event occurring, prior to such amendment, alteration or repeal. To the extent that a change in applicable law, whether by statute or judicial decision, (i) permits greater indemnification, contribution or advancement of
Expenses than would be afforded currently under the Company’s Bylaws and this Agreement, it is the intent of the parties hereto that Indemnitee shall enjoy by this Agreement the greater benefits so afforded by such change or (ii) limits
rights with respect to indemnification, contribution or advancement of Expenses, it is the intent of the parties hereto that the rights with respect to indemnification, contribution or advancement of Expenses in effect prior to such change shall
remain in full force and effect to the extent permitted by applicable law. 
 Section 8.06. Waivers. The observance of
any term of this Agreement may be waived (either generally or in a particular instance and either retroactively or prospectively) by the party entitled to enforce such term only by a writing signed by the party against which such waiver is to be
asserted. Unless otherwise expressly provided herein, no delay on the part of any party hereto in exercising any right, power or privilege hereunder shall operate as a waiver thereof, nor shall any waiver on the part of any party hereto of any
right, power or privilege hereunder operate as a waiver of any other right, power or privilege hereunder nor shall any single or partial exercise of any right, power or privilege hereunder preclude any other or further exercise thereof or the
exercise of any other right, power or privilege hereunder. 
 Section 8.07. Entire Agreement. This Agreement and the
documents referred to herein constitute the entire agreement between the parties hereto with respect to the matters covered hereby, and any other prior or contemporaneous oral or written understandings or agreements with respect to the matters
covered hereby are superseded by this Agreement, provided that this Agreement is a supplement to and in furtherance of the Certificate of Incorporation and Bylaws 

  
 12 

 
of the Company and applicable law, and shall not be deemed a substitute therefor, nor to diminish or abrogate any rights of Indemnitee thereunder. 

Section 8.08. Severability. If any provision or provisions of this Agreement shall be held to be invalid, illegal or unenforceable
for any reason whatsoever: (a) the validity, legality and enforceability of the remaining provisions of this Agreement (including each portion of any Section of this Agreement containing any such provision held to be invalid, illegal or
unenforceable, that is not itself invalid, illegal or unenforceable) shall not in any way be affected or impaired thereby and shall remain enforceable to the fullest extent permitted by law; (b) such provision or provisions shall be deemed
reformed to the extent necessary to conform to applicable law and to give the maximum effect to the intent of the parties hereto; and (c) to the fullest extent possible, the provisions of this Agreement (including each portion of any
Section of this Agreement containing any such provision held to be invalid, illegal or unenforceable, that is not itself invalid, illegal or unenforceable) shall be construed so as to give effect to the intent manifested thereby. 

Section 8.09. Notices. All notices, requests, demands and other communications under this Agreement shall be in writing (which may
be by facsimile transmission). All such notices, requests and other communications shall be deemed received on the date of receipt by the recipient thereof if received prior to 5:00 p.m. in the place of receipt and such day is a business day in the
place of receipt. Otherwise, any such notice, request or communication shall be deemed not to have been received until the next succeeding business day in the place of receipt. The address for notice to a party is as shown on the signature page of
this Agreement, or such other address as any party shall have given by written notice to the other party as provided above. 

Section 8.10. Binding Effect. (a) The Company expressly confirms and agrees that it has entered into this Agreement and
assumed the obligations imposed on it hereby in order to induce Indemnitee to serve as a director or officer of the Company, and the Company acknowledges that Indemnitee is relying upon this Agreement in serving as a director or officer of the
Company. 
 (b) This Agreement shall be binding upon and inure to the benefit of and be enforceable by the parties hereto and
their respective successors, assigns, including any direct or indirect successor by purchase, merger, consolidation or otherwise to all or substantially all of the business and/or assets of the Company, spouses, heirs, and executors, administrators,
personal and legal representatives. The Company shall require and cause any successor (whether direct or indirect by purchase, merger, consolidation or otherwise) to all or substantially all, or a substantial part of the business or assets of the
Company, by written agreement in form and substance satisfactory to Indemnitee, expressly to assume and agree to perform this Agreement in the manner and to the same extent that the Company would be required to perform if no such succession had
taken place. 
 (c) The indemnification, contribution and advancement of Expenses provided by, or granted pursuant to this
Agreement shall continue as to a person who has ceased to be a director or officer and shall inure to the benefit of the heirs, executors, administrators, legatees and assigns of such a person. 

  
 13 

 Section 8.11. Governing Law. This Agreement and the legal relations among the parties
shall be governed by, and construed and enforced in accordance with, the laws of the State of Delaware, without regard to its conflict of laws rules. 
 Section 8.12. Consent To Jurisdiction. Except with respect to any arbitration commenced by Indemnitee pursuant to Section 6.01(a), the Company and Indemnitee hereby irrevocably and
unconditionally (i) agree that any action or proceeding arising out of or in connection with this Agreement shall be brought only in the Chancery Court of the State of Delaware (the “Delaware Court”), and not in any other state
or federal court in the United States of America or any court in any other country, (ii) consent to submit to the exclusive jurisdiction of the Delaware Court for purposes of any action or proceeding arising out of or in connection with this
Agreement, (iii) waive any objection to the laying of venue of any such action or proceeding in the Delaware Court, and (iv) waive, and agree not to plead or to make, any claim that any such action or proceeding brought in the Delaware
Court has been brought in an improper or inconvenient forum. 
 Section 8.13. Headings. The Article and
Section headings in this Agreement are for convenience of reference only, and shall not be deemed to alter or affect the meaning or interpretation of any provisions hereof. 

Section 8.14. Counterparts. This Agreement may be executed in one or more counterparts, each of which shall for all purposes be
deemed to be an original but all of which together shall constitute one and the same Agreement. Only one such counterpart signed by the party against whom enforceability is sought needs to be produced to evidence the existence of this Agreement.

 Section 8.15. Use of Certain Terms. Whenever the context may require, any pronoun used in this Agreement shall include
the corresponding masculine, feminine or neuter forms, and the singular form of nouns, pronouns and verbs shall include the plural and vice versa. 
 [Signature page follows] 

  
 14 

 IN WITNESS WHEREOF, this Agreement has been duly executed and delivered to be effective as
of the date first above written. 
  

			
	COMPANY
	
	LUCA TECHNOLOGIES INC.
		
	By:	 	  

		 	Name:
		 	Title:

 
			
		
	Address:	 	500 Corporate Circle, Suite C
		 	Golden, Colorado 80401
		 	Attention: Chief Executive Officer
	Facsimile:	 	(303) 534-1446
	
	INDEMNITEE
	
	  

	Name:	 	  

	Address:	 	  

		 	  

 [Signature page to Indemnification Agreement]Form of Employment Agreement for Officers

 Exhibit 10.11 
 EMPLOYMENT AGREEMENT 
 THIS EMPLOYMENT AGREEMENT (this
“Agreement”) is made and entered into this         day of             , 2011, by and between Luca Technologies Inc., a Delaware
corporation, (hereinafter referred to as the “Company”), and             (hereinafter referred to as the “Employee”). 

W I T N E S S E T H: 
 WHEREAS, the Company desires to employ the Employee and the Employee desires to be employed by the Company pursuant to the terms and conditions of this Agreement. 

NOW, THEREFORE, for and in consideration of the mutual promises, covenants and obligations contained herein, and other good and valuable
consideration, the receipt and sufficiency of which is hereby acknowledged, the Company and the Employee hereby agree as follows: 
 1. Certain Definitions. 
 As used in this Agreement, the following terms
have the meanings prescribed below: 
 AAA shall have the meaning assigned thereto in Section 13.14 hereof.

 Affiliate is used in this Agreement to define a relationship to a person or entity and means a person or
entity who, directly or indirectly through one or more intermediaries, controls, is controlled by, or is under common control with, such person or entity. 
 Agreement shall have the meaning assigned thereto in the preamble to this Agreement. 
 Annual Bonus shall have the meaning assigned thereto in Section 4.2 hereof. 
 Base Salary means the annual base salary paid to the Employee pursuant to Section 4.1 hereof. 
 Board means the board of directors of the Company. 
 Bonus Payment
shall have the meaning assigned thereto in Section 12.2 hereof. 
 Cause shall have the meaning assigned
thereto in Section 5.3 hereof. 
 Change in Control of the Company shall have the meaning assigned thereto in
the Plan: 
 COBRA means Consolidated Omnibus Reconciliation Act of 1985, as amended, as in effect from time to time
during the Employment Period. 
 Code means the Internal Revenue Code of 1986, as amended, and the rules and regulations
promulgated by the Internal Revenue Service thereunder, all as in effect from time to time during the Employment Period. 

 Common Stock means the Company’s common stock, par value $.01 per share.

 Company shall have the meaning assigned thereto in the preamble to this Agreement. 

Compensation Committee means the Compensation Committee of the Board. 

Competing Business means any individual, business, firm, company, partnership, joint venture, organization, or other entity that
is engaged in the actual or intended business of the Company and/or its Affiliates during the Employment Period and as of the date the Employee leaves the employment of the Company, including, without limitation, the commercialization of microbial
enhanced natural gas. 
 Date of Termination means the earliest to occur of (i) the date of the Employee’s
death or (ii) the date of receipt of the Notice of Termination, or such later date as may be prescribed in the Notice of Termination in accordance with Section 5.6 hereof. 

Disability means either (i) an illness or other disability that prevents the Employee from discharging his
responsibilities under this Agreement for a period of 180 consecutive calendar days, or an aggregate of 180 calendar days in any calendar year, during the Employment Period, all as determined in good faith by the Board (or
the Compensation Committee) or (ii) the Employee is receiving long-term disability benefits under any of the Company’s plans, policies or programs. Notwithstanding anything to the contrary, in the event the Company temporarily replaces the
Employee, or transfers the Employee’s duties or responsibilities to another individual on account of the Employee’s inability to perform such duties due to a mental or physical incapacity which is, or is reasonably expected to become, a
Disability, then the Employee’s employment shall not be deemed terminated by the Company and the Employee shall not be able to resign with Good Reason as a result thereof. Any question as to the existence of a Disability as to which the
Employee and the Company cannot agree shall be determined in writing by a qualified independent physician mutually acceptable to the Employee and the Company. If the Employee and the Company cannot agree as to a qualified independent physician, each
shall appoint such a physician and those two physicians shall select a third who shall make such determination in writing. The determination of a Disability made in writing to the Company and the Employee by such physician shall be final and
conclusive for all purposes of this Agreement. 
 Employment Period shall have the meaning assigned thereto in
Section 3 hereof. 
 Employee shall have the meaning assigned thereto in the preamble to this Agreement.

 Exchange Act means the Securities Exchange Act of 1934, as amended, and the rules and regulations promulgated by
the Securities and Exchange Commission thereunder, all as in effect from time to time during the Employment Period. 

Excise Taxes shall have the meaning assigned thereto in Section 12.1 hereof. 

Good Reason shall have the meaning assigned thereto in Section 5.5 hereof. 

  
 2 

 Indemnification Agreement shall have the meaning assigned thereto in
Section 4.8 hereof. 
 Losses shall have the meaning assigned thereto in Section 12.8 hereof.

 Notice of Termination shall have the meaning assigned thereto in Section 5.6 hereof. 

Plan means the Company’s Fourth Amended and Restated 2007 Equity Incentive Plan, as the same may be amended or restated from
time to time 
 Proprietary Information and Inventions Agreement means the Employee Proprietary Information and
Inventions Agreement dated             between the Employee and the Company, as the same may be amended from time to time. 

Restricted Territory means (a) the United States, and (b) any other country in which the Company does business, has
customers, or is soliciting customers at the time this restriction becomes applicable. 
 Rules shall have the meaning
assigned thereto in Section 13.14 hereof. 
 Successor Provisions shall have the meaning assigned thereto in
Section 12.5 hereof. 
 Tax Consultant shall have the meaning assigned thereto in Section 12.6
hereof. 
 Vacation Time shall have the meaning assigned thereto in Section 4.4 hereof. 

Without Cause shall have the meaning assigned thereto in Section 5.4 hereof. 

Unless otherwise stated herein, all “$” refer to United States dollars. 

2. General Duties and Responsibilities of the Company and the Employee. 
 2.1(a) The Company agrees to continue to employ the Employee, and the Employee agrees to continue employment by the Company, as
            and to be based in the Company’s offices in Golden, Colorado. The Employee shall report to and be subject to the direction of the
            . The Employee shall have the authority, duties and responsibilities that are normally associated with and inherent in the capacity in which the Employee will be performing, and
shall have such other or additional duties which are not inconsistent with the Employee’s position, as may from time to time be reasonably assigned to the Employee
by the             . The Employee acknowledges and agrees that he will continue to be employed as an at-will-employee, which means that this Agreement may be terminated at the
election of either the Employee or the Company, for any reason or no reason, subject to the provisions of Section 5 hereof. While employed hereunder, the Employee shall devote full time and attention during normal business hours to
the affairs of the Company and use his best efforts to perform faithfully and efficiently his duties and responsibilities. The Employee agrees to cooperate fully with the Board and other employees of the Company, and not to engage in any
activity which conflicts with or interferes with the performance of his duties hereunder. During the Employment Period, the Employee shall devote his best efforts and skills to the business and

  
 3 

 
interests of the Company, do his utmost to further enhance and develop the best interests and welfare of the Company, and endeavor to improve his ability and knowledge of the business of the
Company, in an effort to increase the value of his services for the mutual benefit of the parties hereto. During the Employment Period, it shall not be a violation of this Agreement for the Employee to (i) serve on any
corporate board or committee thereof with the prior approval of the Board, (ii) serve on any civic, or charitable boards or committees (except for boards or committees of a Competing Business unless previously approved by the Board),
(iii) deliver lectures, fulfill teaching or speaking engagements, (iv) testify as a witness in litigation involving a former employer; provided, however, any such activities must not materially interfere with performance of the
Employee’s responsibilities under this Agreement or (v) any other activities described on Schedule 2.1 attached hereto. 
 (b) The Employee represents and covenants to the Company that he is not subject or a party to any employment agreement, noncompetition covenant, nondisclosure agreement, or any similar
agreement or covenant that would prohibit the Employee from executing this Agreement and fully performing his duties and responsibilities hereunder, or would in any manner, directly or indirectly, limit or affect the duties and responsibilities
that may now or in the future be assigned to the Employee hereunder. The Employee further represents and warrants that he is not presently subject to any legal actions, claims or administrative proceedings, including bankruptcy proceedings or
IRS audits or proceedings that would affect his ability to perform his responsibilities hereunder. 
 2.2 The Employee
acknowledges and agrees that he owes a fiduciary duty of loyalty, fidelity and allegiance to act at all times in the best interests of the Company and its Affiliates and to do no act and to make no statement, oral or written,
which would injure the business, interests or reputation of the Company or its Affiliates. 
 3. Term. Unless sooner terminated pursuant
to other provisions hereof, the Employee’s period of employment under this Agreement shall begin on the date hereof and shall end upon termination of this Agreement by the Company or the Employee pursuant to the terms hereof (the
“Employment Period”). 
 4. Compensation and Benefits. 

4.1 Base Salary. As compensation for services to the Company, the Company shall pay to the Employee from the date hereof
until the Date of Termination an annual base salary of $            . The Board (or the Compensation Committee) will conduct an annual review of the Employee’s compensation
and, in its sole discretion, may increase the Base Salary based upon relevant circumstances. The Base Salary shall be payable in equal semi-monthly installments or in accordance with the Company’s established policy, subject
only to such payroll and withholding deductions as may be required by law and other deductions (consistent with the Company’s policy for all employees) relating to the Employee’s election to participate in the Company’s
incentive, savings, retirement and other employee benefit plans. 
 4.2 Bonus. In addition to the Base Salary, the
Employee may be awarded, for each calendar year until the Date of Termination, a performance bonus to be determined by, and to be at the sole discretion of, the Compensation Committee (the “Annual Bonus”). The criteria for

  
 4 

 
the Annual Bonus, if any, and if applicable, any criteria relating to a target for the Annual Bonus, shall be determined annually by the Compensation Committee and communicated to the Employee.
The Annual Bonus may be paid in cash or in Company equity or equity-based awards at the sole discretion of the Compensation Committee. Each such Annual Bonus shall be payable in an amount and at a time to be determined by the Board (or the
Compensation Committee) in its sole discretion; provided that the Annual Bonus will be paid by March 15 of the calendar year following the calendar year for which it is earned. 

4.3 Equity Awards. The Employee may be eligible to participate in the Plan or any successor plan, subject to the terms of the Plan
or successor plan, as determined by the Compensation Committee, in its sole discretion. 
 4.4 Vacation. Until the Date
of Termination, the Employee shall be entitled to annual paid vacation equal to             days during each one-year period commencing on the date of execution hereof (the
“Vacation Time”). The use of any Vacation Time not taken during the applicable one-year period will be subject to the Company’s vacation policy as in effect from time to time. 

4.5 Incentive, Savings and Retirement Plans. Until the Date of Termination, the Employee will be eligible to participate in and
shall receive all benefits under all incentive, savings and retirement plans and programs maintained or hereinafter established by the Company for the benefit of its employees; provided, however, that the Company shall not be obligated to
institute, maintain, or refrain from changing, amending, or discontinuing, any such incentive, savings and retirement plans and programs. 
 4.6 Benefit Plans. Until the Date of Termination, the Employee and/or the Employee’s dependents, as the case may be, shall be eligible to participate in and shall receive all benefits
under each benefit plan of the Company maintained or hereinafter established by the Company for the benefit of its employees. Such benefit plans may include, without limitation, medical, dental, disability, group life, accidental death
and travel accident insurance plans and programs. The Company shall not be obligated to institute, maintain, or refrain from changing, amending, or discontinuing, any such employee benefit program or plan. 

4.7 Reimbursement of Business Expenses. The Employee may from time to time until the Date of Termination incur various
business expenses customarily incurred by persons holding positions of like responsibility, including, without limitation, travel, entertainment and similar expenses incurred for the benefit of the Company. Subject to the Employee
complying with the Company’s policy regarding the reimbursement of such expenses as in effect from time to time during the Employment Period, which does not necessarily allow reimbursement of all such expenses, and subject to
13.18, the Company shall reimburse the Employee for such expenses from time to time, at the Employee’s request, and the Employee shall account to the Company for all such expenses. 

4.8 Indemnification Agreement. The Company has entered into an Indemnification Agreement regarding indemnification of the Employee
in the form of such agreements entered into with the Company’s other executive officers (the “Indemnification Agreement”). The 

  
 5 

 
Company will also cause the Employee to be covered by its director and officer insurance policies as they are in effect from time to time for its directors and executive officers. 

4.9 Clawback Provisions. Notwithstanding any other provisions in this Agreement to the contrary, any incentive-based compensation,
or any other compensation, paid to the Employee pursuant to this Agreement or any other agreement or arrangement with the Company which is subject to recovery under any law, government regulation or stock exchange listing requirement, will be
subject to such deductions and clawback as may be required to be made pursuant to such law, government regulation or stock exchange listing requirement (or any policy adopted by the Company pursuant to any such law, government regulation or stock
exchange listing requirement). 
 5. Termination. 
 5.1 Death. This Agreement and Employee’s employment with the Company and its Affiliates, shall terminate automatically upon the death of the Employee. 

5.2 Disability. The Company may terminate this Agreement and Employee’s employment with the Company and its Affiliates, upon
written notice to the Employee delivered in accordance with Sections 5.6 and 13.1 hereof, upon any Disability. 
 5.3 Cause. The Company may terminate this Agreement and Employee’s employment with the Company and its Affiliates, upon written notice to the Employee delivered in accordance with
Sections 5.6 and 13.1 hereof, for Cause. For purposes of this definition of “Cause,” the term “Company” shall mean the Company and/or its Affiliates. For purposes of this Agreement, subject
to the notice provisions set forth below, “Cause” means (i) the conviction (or plea of nolo contendere or equivalent plea) of the Employee of a felony which, through lapse of time or otherwise, is not subject to appeal, (ii) the
Employee having engaged in misconduct causing a violation by the Company of any state or federal laws which results in an injury to the business, condition (financial or otherwise), results of operations or prospects of the Company as determined in
good faith by the Board or a committee thereof, (iii) the Employee having engaged in a theft of corporate funds or corporate assets of the Company or in an act of fraud upon the Company, (iv) an act of personal dishonesty taken by the
Employee that was intended to result in personal enrichment of the Employee at the expense of the Company, (v) the Employee’s refusal, without proper legal cause, to perform his duties and responsibilities as contemplated in this Agreement
(as determined in the sole discretion of the Board) or any other breach by the Employee of this Agreement, (vi) the Employee’s refusal, without proper legal cause, to comply with any valid legal directive of the Board, (vii) the
Employee’s engaging in activities which would constitute a breach of the Company’s policies described in Section 7 hereof or any other applicable policies, rules or regulations of the Company, including, but not limited to,
with respect to use of drugs or alcohol or reimbursement of business expenses, and (viii) the Employee’s violation of the Proprietary Information and Inventions Agreement or the terms of this Agreement. If the Company desires to terminate
the Employee for Cause pursuant to the provisions of this Section 5.3, the Employee will be given a written notice by the Board of the facts and circumstances providing the basis for termination for Cause, and the Employee will have 30
days from the date of such notice to remedy, cure or rectify the situation giving rise to termination for Cause to the reasonable satisfaction of the Board (except in the event of 

  
 6 

 
termination for Cause pursuant to subparagraph (i) above as to which no cure period will be permitted). 
 5.4 Without Cause. The Company may terminate this Agreement and Employee’s employment with the Company and its Affiliates Without Cause, upon written notice to the Employee delivered in
accordance with Sections 5.6 and 13.1 hereof. For purposes of this Agreement, the Employee will be deemed to have been terminated “Without Cause” if the Employee is terminated by the Company for any reason
other than Cause or Disability. 
 5.5 Good Reason. The Employee may terminate his employment with the Company
and its Affiliates and this Agreement for Good Reason, upon written notice to the Company delivered in accordance with Sections 5.6 and 13.1 hereof. For purposes of this definition of “Good Reason,” the
term “Company” shall mean the Company and/or its Affiliates. For purposes of this Agreement, “Good Reason” means: (i) a material diminution in the Employee’s authority, duties or responsibilities
as contemplated in this Agreement, (ii) requiring the Employee to relocate to any office or location more than 50 miles outside of the Denver, Colorado metropolitan area without his consent, (iii) any material breach by the Company of any
of the provisions of this Agreement, or (iv) a material reduction at any time during the Employment Period, of the Base Salary of the Employee without his consent unless such reduction is also applied to all similarly situated employees of the
Company in the same proportions. If an Employee intends to terminate for a Good Reason, he must provide the Company 20 days written notice and the Company will have 20 days to cure and if the event is not cured, the Employee must specifically
terminate his employment for Good Reason hereunder within 60 days from the date that he had actual notice of the event of Good Reason. 
 5.6 Notice of Termination. Any termination of this Agreement by the Company or the Employee shall be communicated by Notice of Termination to the other party hereto
given in accordance with this Agreement. For purposes of this Agreement, a “Notice of Termination” means a written notice which (i) indicates the specific termination provision in this Agreement relied
upon, (ii) sets forth in reasonable detail the facts and circumstances claimed to provide a basis for termination of the Employee’s employment under the provision so indicated and (iii) specifies the Date of Termination, if
such date is other than the date of receipt of such notice (which Date of Termination shall not be more than 60 days after the giving of such notice, unless otherwise provided herein). Notwithstanding the foregoing, the Company may elect
to consider the Employee as an employee after the Date of Termination for purposes of complying with the provisions of Section 6 hereof. 
 5.7 Resignation of All Other Positions. Upon termination of the Employee’s employment hereunder for any reason, the Employee shall be deemed to have resigned from all positions that the
Employee holds as an officer, manager or member of the board of directors (or a committee thereof) of the Company or any of its Affiliates. 

6. Obligations of the Company upon Termination. 
 6.1 Cause; Other Than Good Reason. If this Agreement and Employee’s employment with the Company and its Affiliates shall be terminated either by the Company for Cause or by the Employee for
any reason other than Good Reason, the Company shall pay to the Employee, 

  
 7 

 
in a lump sum in cash within the time period after the Date of Termination required by applicable law, the aggregate of the Employee’s Base Salary (as in effect on the Date of
Termination) through the Date of Termination, if not theretofore paid. All other obligations of the Company and rights of the Employee hereunder shall terminate effective as of the Date of Termination, except as provided for in any benefit
plans, incentive stock plans or other compensation plans and as otherwise provided in this Agreement. 
 6.2 Death or
Disability. If this Agreement and Employee’s employment with the Company and its Affiliates is terminated as a result of the Employee’s death or Disability, the Company shall pay to the Employee or his estate, in a lump
sum in cash within the time period after the Date of Termination required by applicable law, the Employee’s Base Salary (as in effect on the Date of Termination) through the Date of Termination, if not theretofore paid. All other
obligations of the Company and rights of the Employee hereunder shall terminate effective as of the Date of Termination, except as provided for in any benefit plans, incentive stock plans or other compensation plans and as otherwise provided in
this Agreement. 
 6.3 Without Cause. If this Agreement and Employee’s employment with the Company and its
Affiliates shall be terminated by the Company Without Cause, the Company shall pay to the Employee in a lump sum in cash within the time period after the Date of Termination required by applicable law, the aggregate of the Employee’s Base
Salary (as in effect on the Date of Termination) through the Date of Termination, if not theretofore paid. 
 6.4
Termination of Employment in Proximately to Change in Control. If this Agreement and Employee’s employment with the Company and its Affiliates shall be terminated either (i) by the Employee for Good Reason or (ii) by the
Company Without Cause, in each case within three months prior to our one year after a Change in Control, in lieu of any other obligation the Company may have pursuant to Section 6 hereof: 

(a) The Company shall pay to the Employee in a lump sum in cash within the time period after the Date of Termination
required by applicable law, if not theretofore paid, the Employee’s Base Salary (as in effect on the Date of Termination) through the Date of Termination; 

(b) The Company shall pay to the Employee in a lump sum in cash within 45 days after the Date of Termination an amount
equal to the Annual Bonus (based upon achievement of performance objectives for the relevant year, the extent of such achievement to be determined by the Compensation Committee taking into account the performance through the Date of Termination, and
in the Compensation Committee’s sole discretion, the expected performance through the remainder of the then-current performance period) multiplied by a fraction, the numerator of which is the number of full weeks in the period beginning on the
first day of the then-current annual performance period and ending on the Date of Termination and the denominator of which is fifty-two; and 
 (c) The Company shall pay to the Employee in a lump sum in cash within 45 days after the Date of Termination an amount equal to the sum of
(i)             times the Base Salary (as in effect on the Date of Termination), (ii)             times the Annual
Bonus received by the Employee for the year preceding the year in which the Date of Termination occurs and (iii)             times the current monthly premium amount payable by the
Employee for himself and his dependents if the Employee had timely and properly elected continuation coverage under COBRA. 

Notwithstanding any of the above to the contrary, the Employee will not be entitled to any of the benefits or severance payments provided
in Sections 6.4(b) and 6.4(c) if (i) the Employee breaches this Agreement, including the provisions of Sections 8 through 10 hereof, or the Proprietary Information and Inventions Agreement or (ii) the
Employee fails to execute a release from liability and waiver of right to sue the Company and its Affiliates, substantially in form and substance as attached hereto as Exhibit A, so that it becomes irrevocable within 45 days after

  
 8 

 
Date of Termination. To the extent any amount payable under this Section 6.4 is subject to Section 409A of the Code, if the period during which the Employee has discretion to
execute or revoke the general release of claims straddles two taxable years of the Employee, then the Company shall make the severance payments starting in the second of such taxable years, regardless of which taxable year Employee actually delivers
the executed general release of claims to the Company. Employee may not, directly or indirectly, designate the calendar year of payment. 
 All other obligations of the Company and rights of the Employee hereunder shall terminate effective as of the Date of Termination, except as provided for in any benefit plans, incentive stock plans or
other compensation plans and as otherwise provided in this Agreement. 
 6.5 Specified Employee. If the Employee is a
“specified employee” as such term is defined under Section 409A of the Code on the date of such Employee’s termination of employment and if the benefit to be provided under this Section 6 is subject to
Section 409A of the Code and is payable on account of a termination of employment, payment in respect of such benefit shall not commence until the first business day that is six months after the Employee’s termination date and shall
otherwise be paid as provided in this Agreement. 
 7. Employee’s Obligation to Comply with Company Policies. For purposes of this
Section 7, the term “Company” shall mean the Company and/or its Affiliates. The Employee agrees to execute and comply at all times during the Employment Period with all applicable policies, rules and regulations of the Company,
including, without limitation, the Company’s Code of Business and Ethical Conduct, Insider Trading Policy, and Corporate Disclosure Policy, each as in effect from time to time during the Employment Period. 

8. Employee’s Obligation as to Proprietary Information and Inventions. The obligations of the Employee with respect to nondisclosure of
proprietary information of the Company, assignment of inventions, use of Company records and related covenants are governed by the terms of the Proprietary Information and Inventions Agreement. This Agreement and the Proprietary Information and
Inventions Agreement and any such other similar agreement between the parties shall be construed and applied as being mutually consistent to the fullest extent possible. 
 9. Employee’s Non-Disparagement Obligation. 
 During the Employment
Period and thereafter, the Employee shall not defame or disparage the Company, its Affiliates and their officers, directors, members or partners. The Employee agrees to cooperate with the Company in refuting any defamatory or disparaging remarks by
any third party made in respect of the Company or its Affiliates or their directors, members, officers or executives. The Company further agrees not to defame or disparage the Employee and agrees to cooperate with the Employee in refuting any
defamatory or disparaging remarks by any third party made with respect to his employment with the Company. This Section 9 does not, in any way, restrict or impede the Employee from exercising protected rights to the extent that such
rights cannot be waived by agreement or from complying with any applicable law or regulation or a valid order of a court of competent jurisdiction or an authorized 

  
 9 

 
government agency, provided that such compliance does not exceed that required by the law, regulation or order. 
 10. Employee’s Non-Competition and Non-Solicitation Obligations. 

10.1 (a) All references in this Section 10 to the term “Company” shall mean the Company
and/or its Affiliates. During the Employment Period and for the twelve month period following the Date of Termination, the Employee shall not, acting alone or in conjunction with others, directly or indirectly, in the Restricted
Territory, invest or engage, directly or indirectly, in any Competing Business or accept employment with or render services to such a Competing Business as a director, officer, agent, employee, partner or consultant or in any
other capacity; provided, however, that this Section 10.1(a) shall not be deemed violated if the Employee is or becomes the beneficial owner (as defined in Rule 13d-3 under the Exchange Act) of up to four percent of the voting stock of
any corporation subject to the periodic reporting requirements of the Exchange Act. 
 (b) In addition to the other obligations
agreed to by the Employee in this Agreement, the Employee agrees that for 24 months following the Date of Termination, he shall not directly or indirectly, (i) hire or attempt to hire any employee of the Company, or induce,
entice, encourage or solicit any employee of the Company to leave his or her employment, or (ii) contact, communicate or solicit any distributor, customer or acquisition or business prospect or business opportunity of the Company for
the purpose of causing them to terminate or alter or amend their business relationship with the Company to the Company’s detriment. 
 Notwithstanding the foregoing, if the Company fails to make the payments to the Employee set forth in Section 6.4 hereof, then the terms of this Section 10.1 will not be effective
from the date of such nonpayment; provided, that if the Company subsequently makes any such payments, this Section 10.1 will become effective in accordance with its terms for so long as the Company continues to make the payments required
by Section 6.4 hereof. 
 10.2 (a) The Employee hereby specifically acknowledges and agrees that: 

(1) The Company has expended and will continue to expend substantial time, money and effort in developing its business;

 (2) The Employee will, in the course of his employment, be personally entrusted with and exposed to
confidential information about the Company or its Affiliates; 
 (3) The Company, during the Employment Period
and thereafter, will be engaged in a highly competitive business; 
 (4) The Employee could, after having access
to the Company’s financial records, contracts, and other confidential information and know-how and, after receiving training by and experience with the Company, become a competitor; 

  
 10 

 (5) The temporal and other restrictions contained in this
Section 10 are in all respects reasonable and necessary to protect the business goodwill, trade secrets, prospects and other reasonable business interests of the Company; 

(6) The enforcement of this Agreement in general, and of this Section 10 in particular, will not work an
undue or unfair hardship on the Employee or otherwise be oppressive to him; it being specifically acknowledged and agreed by the Employee that he has activities and other business interests and opportunities which will provide
him adequate means of support if the provisions of this Section 10 are enforced after the Date of Termination; and 
 (7) The enforcement of this Agreement in general, and of this Section 10 in particular, will neither deprive the public of needed goods or services nor otherwise be injurious to the
public. 
 (b) It is acknowledged, understood and agreed by and between the parties hereto that the covenants
made by the Employee in this Section 10 are essential elements of this Agreement and that, but for the agreement of the Employee to comply with such covenants, the Company would not have entered into this Agreement. 

11. Acknowledgement. In the event of any pending, threatened or actual breach of any of the covenants or provisions of Sections 8
through 10 hereof, as determined by a court of competent jurisdiction, it is acknowledged and agreed by the Employee that the Company shall be entitled to seek a restraining order or injunctive relief in addition to any
other remedies at law and in equity, in each case without notice or bond, as determined by a court of competent jurisdiction. Should a court of competent jurisdiction or an arbitrator (pursuant to Section 13.13 hereof) declare
any provision of Sections 8 through 10 hereof to be unenforceable due to an unreasonable restriction of duration or geographical area, or for any other reason, such court or arbitrator is hereby granted the consent
of each of the Employee and the Company to reform such provision and/or to grant the Company any relief, at law or in equity, reasonably necessary to protect the reasonable business interests of the Company or any
of its Affiliates. 
 12. Certain Payments by the Company 

12.1 In the event that the Employee is deemed to have received an “excess parachute payment” (as defined in
Section 280G(b) of the Code) which is subject to the excise taxes (the “Excise Taxes”) imposed by Section 4999 of the Code in respect of any payment pursuant to this Agreement or any other agreement, plan, instrument or
obligation, in whatever form, the Company shall make the Bonus Payment (defined below) to the Employee notwithstanding any contrary provision in this Agreement or any other agreement, plan, instrument or obligation. 

12.2 The term “Bonus Payment” means a cash payment in an amount equal to the sum of (i) all Excise Taxes payable by
the Employee, plus (ii) all additional Excise Taxes and federal or state income taxes to the extent such taxes are imposed in respect of the Bonus Payment, such 

  
 11 

 
that the Employee shall be in the same after-tax position and shall have received the same benefits that he would have received if the Excise Taxes had not been imposed. For purposes of
calculating any income taxes attributable to the Bonus Payment, the Employee shall be deemed for all purposes to be paying income taxes at the highest marginal federal income tax rate, taking into account any applicable surtaxes and other generally
applicable taxes which have the effect of increasing the marginal federal income tax rate and, if applicable, at the highest marginal state income tax rate, to which the Bonus Payment and the Employee are subject. An example of the calculation of
the Bonus Payment is set forth below. Assume that the Excise Tax rate is 20%, the highest federal marginal income tax rate is 40% and the Employee is not subject to state income taxes. Further assume that the Employee has received an excess
parachute payment in the amount of $200,000, on which $40,000 ($200,000 x 20%) in Excise Taxes are payable. The amount of the required Bonus Payment is thus computed to be $100,000, i.e., the Bonus Payment of $100,000, less additional Excise
Taxes on the Bonus Payment of $20,000 (i.e., 20% x $100,000) and income taxes of $40,000 (i.e., 40% x $100,000), yields $40,000, the amount of the Excise Taxes payable in respect of the original excess parachute payment. 

12.3 The Employee agrees to reasonably cooperate with the Company to minimize the amount of the excess parachute payments, including,
without limitation, assisting the Company in establishing that some or all of the payments received by the Employee that are “contingent on a change,” as described in Section 280G(b)(2)(A)(i) of the Code, are reasonable compensation
for personal services actually rendered by the Employee before the date of such change or to be rendered by the Employee on or after the date of such change. 
 12.4 The Company shall make any payment required to be made under Section 12 hereof in a cash lump sum within 30 days after the date on which the Employee received or is deemed to have
received any such excess parachute payment. Notwithstanding the foregoing, in no event will any Bonus Payment be paid later than the end of Employee’s taxable year next following Employee’s taxable year in which he remits the taxes to
which such Bonus Payment relates. 
 12.5 In the event that there is any change to the Code which results in the recodification
of Section 280G or Section 4999 of the Code, or in the event that either such section of the Code is amended, replaced or supplemented by other provisions of the Code of similar import (“Successor Provisions”), then this
Agreement shall be applied and enforced with respect to such new Code provisions in a manner consistent with the intent of the parties as expressed herein, which is to assure that the Employee is in the same after-tax position and has received the
same benefits that he would have been in and received if any taxes imposed by Section 4999 (or any Successor Provisions) had not been imposed. 
 12.6 All determinations required to be made under Section 12 hereof including, without limitation, whether and when a Bonus Payment is required, and the amount of such Bonus Payment and the
assumptions to be utilized in arriving at such determinations, unless otherwise expressly set forth in this Agreement, shall be made within 30 days from the Date of Termination by the independent tax consultant(s) selected by the Company and
reasonably acceptable to the Employee (the “Tax Consultant”). The Tax Consultant must be a qualified tax attorney or certified public accountant. All fees and expenses of the Tax Consultant shall be paid in full by the Company. Any
Excise Taxes as determined pursuant to Section 12 hereof shall be 

  
 12 

 
paid by the Company to the Internal Revenue Service or any other appropriate taxing authority on the Employee’s behalf within five (5) business days after receipt of the Tax
Consultant’s final determination by the Company and the Employee. 
 12.7 If the Tax Consultant determines that there is
substantial authority (within the meaning of Section 6662 of the Code) that no Excise Taxes are payable by the Employee, the Tax Consultant shall furnish the Employee with a written opinion that failure to disclose or report the Excise Taxes on
the Employee’s federal income tax return will not constitute a substantial understatement of tax or be reasonably likely to result in the imposition of a negligence or any other penalty. 

12.8 The Company shall indemnify and hold harmless the Employee, on an after-tax basis, from any costs, expenses, penalties, fines,
interest or other liabilities (“Losses”) incurred by the Employee with respect to the exercise by the Company of any of its rights under Section 12 hereof, including, without limitation, any Losses related to the
Company’s decision to contest a claim of any imputed income to the Employee or if the determination in Section 12.7 is incorrect. The Company shall pay all fees and expenses incurred under Section 12 hereof, and shall
promptly reimburse the Employee for the reasonable expenses incurred by the Employee in connection with any actions taken by the Company or required to be taken by the Employee hereunder within 30 days after the Employee provides reasonable
documentation of such expenses. Notwithstanding the foregoing, expenses incurred by Employee, including without limitation, attorneys’ fees, due to a tax audit or litigation in connection with any excise tax (including penalties and interest or
other excise taxes thereon) under Code Section 4999 or Code Section 280G shall be reimbursed by the Company no later than the end of the Employee’s tax year following the tax year in which such taxes that are subject to the audit or
litigation are remitted to the taxing authority, or where as a result of such audit or litigation no taxes are remitted, by the end of the Employee’s tax year following the tax year in which the audit is completed or there is a final
nonappealable settlement or other resolution of the litigation. The Employee’s right to payment or reimbursement pursuant to this Section 12.8 shall not be subject to liquidation or exchange for any other benefit. 

12.9 Furthermore, with respect to any payments that are taxable and includable in income to be paid under this Section 12 and
to the extent such payments are not for the Bonus Payment or due to tax audit or litigation expenses described in the preceding paragraph then such payments shall only be payable if such expenses are incurred during the 15 year period commencing on
the Date of Termination; amounts payable in one calendar year will not affect amounts payable in another calendar year; in no event will any payment be paid later than the end of Employee’s taxable year following the Employee’s taxable
year in which the expenses were incurred; and such payments cannot be substituted for any other benefits or subject to liquidation. 
 13.
Miscellaneous. 
 13.1 Notices. All notices and other communications required or permitted
hereunder or necessary or convenient in connection herewith shall be in writing and shall be deemed to have been given when (i) delivered by hand (with written confirmation of receipt) or sent by facsimile (with conformation
of transmission), or (ii) on the third business day following 

  
 13 

 
deposit in the United States mail by registered or certified mail, return receipt requested, postage prepaid, to the addresses as follows (provided that notice of change of address
shall be deemed given only when received): 
  

			
		 	If to the Company to:
		
		 	Luca Technologies Inc.
		 	500 Corporate Circle, Unit C
		 	Golden, Colorado 80401
		 	Attention:
                                        

		 	Facsimile No.: (303) 534-1446
		
		 	If to the Employee to:
		 	
		 	
		 	

 or to such other names or addresses as the Company or the Employee, as the case may be, shall designate by notice to
the other party hereto in the manner specified in this Section 13.1. 
 13.2 Waiver of Breach. The waiver by
any party hereto of a breach of any provision of this Agreement shall neither operate nor be construed as a waiver of any subsequent breach by any party. Except as expressly provided for herein, the failure of either party hereto
to take any action by reason of any breach will not deprive such party of the right to take action at any time while such breach occurs. 
 13.3 Assignment. This Agreement shall be binding upon and inure to the benefit of the Company, and its respective successors, legal representatives and assigns, and upon the Employee, his
heirs, executors, administrators, representatives and assigns; provided, however, the Employee agrees that his rights and obligations hereunder are personal to him and may not be assigned without the express written consent of
the Company. Any reference to “Company” herein shall mean the Company as well as any successors thereto. 
 13.4
Entire Agreement; No Oral Amendments. This Agreement, together with any exhibit attached hereto and any document, policy, rule or regulation referred to herein, including without limitation the Proprietary Information and Inventions
Agreement, replaces all previous agreements and discussions relating to the same or similar subject matter between the Employee and the Company, and constitutes the entire agreement between the Employee and the Company with respect to
the subject matter of this Agreement; provided, however, that the Indemnification Agreement between the Company and the Employee dated the date hereof shall remain in full force and effect after the date hereof. This Agreement may not be modified in
any respect by any verbal statement, representation or agreement made by any executive, officer, or representative of the Company or by any written agreement unless signed by an officer of the Company who is expressly authorized
by the Company to execute such document. 
 13.5 Exit Obligations. Upon (a) voluntary or involuntary
termination of the Employee’s employment or (b) the Company’s request at any time during the Employee’s 

  
 14 

 
employment, the Employee shall (i) provide or return to the Company any and all Company property, including keys, key cards, access cards, identification cards, security devices, employer
credit cards, network access devices, computers, cell phones, smartphones, PDAs, pagers, fax machines, equipment, speakers, manuals, reports, files, books, compilations, thumb drives or other removable information storage devices, hard drives,
negatives and data and all Company documents and materials belonging to the Company and stored in any fashion, including but not limited to those that are covered by the Proprietary Information and Inventions Agreement, that are in the possession or
control of the Employee, whether they were provided to the Employee by the Company or any of its business associates or created by the Employee in connection with his employment by the Company; and (ii) delete or destroy all copies of any such
documents and materials not returned to the Company that remain in the Employee’s possession or control, including those stored on any non-Company devices, networks, storage locations and media in the Employee’s possession or control.

 13.6 Publicity. The Employee hereby irrevocably consents to any and all uses and displays, by the Company and its
agents, representatives and licensees, of the Employee ‘s name, voice, likeness, image, appearance and biographical information in, on or in connection with any pictures, photographs, audio and video recordings, digital images, websites,
television programs and advertising, other advertising and publicity, sales and marketing brochures, books, magazines, other publications, CDs, DVDs, tapes and all other printed and electronic forms and media throughout the world, at any time during
or after the period of his employment by the Company, for all legitimate commercial and business purposes of the Company without further consent from or royalty, payment or other compensation to the Employee. The Employee hereby forever waives and
releases the Company and its directors, officers, employees and agents from any and all claims, actions, damages, losses, costs, expenses and liability of any kind, arising under any legal or equitable theory whatsoever at any time during or after
the period of his employment by the Company, arising directly or indirectly from the Company’s and its agents’, representatives’ and licensees’ exercise of their rights in connection with any uses pursuant to this
Section 13.6. 
 13.7 Enforceability. If any provision of this Agreement or application thereof to
anyone or under any circumstances shall be determined to be invalid or unenforceable, such invalidity or unenforceability shall not affect any other provisions or applications of this Agreement which can be given effect without
the invalid or unenforceable provision or application. 
 13.8 Choice of Law. THIS AGREEMENT SHALL BE GOVERNED BY
AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF COLORADO, WITHOUT REGARD TO THE PRINCIPLES OF CONFLICTS OF LAW. 
 13.9 Corporate Authority. The Company has all corporate power and authority necessary to enter into this Agreement and to perform its obligations hereunder. This Agreement has been duly authorized,
executed and delivered by the Company. 
 13.10 Withholdings: Right of Offset. The Company may withhold and deduct from
any benefits and payments made or to be made pursuant to this Agreement (a) all federal, state, local and other taxes as may be required pursuant to any law or governmental regulation or

  
 15 

 
ruling, (b) all other employee deductions made with respect to the Company’s employees generally, and (c) any advances made to the Employee and owed to the Company.

 13.11 Nonalienation. The right to receive payments under this Agreement shall not be subject in any manner to
anticipation, alienation, sale, transfer, assignment, pledge or encumbrance by the Employee, his dependents or beneficiaries, or to any other person who is or may become entitled to receive such payments hereunder. The right to receive
payments hereunder shall not be subject to or liable for the debts, contracts, liabilities, engagements or torts of any person who is or may become entitled to receive such payments, nor may the same be subject to attachment or
seizure by any creditor of such person under any circumstances, and any such attempted attachment or seizure shall be void and of no force and effect. 
 13.12 Incompetent or Minor Payees. Should the Board determine that any person to whom any payment is payable under this Agreement has been determined to be legally incompetent or is
a minor, any payment due hereunder may, notwithstanding any other provision of this Agreement to the contrary, be made in any one or more of the following ways: (a) directly to such minor or person; (b) to the legal guardian
or other duly appointed personal representative of the person or estate of such minor or person; or (c) to such adult or adults as have, in the good faith knowledge of the Board, assumed custody and support of such minor or
person; and any payment so made shall constitute full and complete discharge of any liability under this Agreement in respect to the amount paid. 
 13.13 Title and Headings; Construction. Titles and headings to Sections hereof are for the purpose of reference only and shall in no way limit, define or otherwise affect the
provisions hereof. Any and all Exhibits referred to in this Agreement are, by such reference, incorporated herein and made a part hereof for all purposes. The words “herein,” “hereof,” “hereunder” and
other compounds of the word “here” shall refer to the entire Agreement and not to any particular provision hereof. 
 13.14 Arbitration. 
 (a) If any dispute or controversy
arises between the Employee, the Company relating to (1) this Agreement in any way or arising out of the parties’ respective rights or obligations under this Agreement or (2) the employment of the Employee or the
termination of such employment, then either party may submit the dispute or controversy to arbitration under the then-current Commercial Arbitration Rules (the “Rules”) of the American Arbitration Association
(the “AAA”). Any arbitration hereunder shall be conducted before a panel of three arbitrators unless the parties mutually agree that the arbitration shall be conducted before a single arbitrator. The arbitrators shall
be selected (from lists provided by the AAA) through mutual agreement of the parties, if possible. If the parties fail to reach agreement upon appointment of arbitrators within twenty (20) days following receipt by one party of
the other party’s notice of desire to arbitrate, then within five (5) days following the end of such 20-day period, each party shall select one arbitrator who, in turn, shall within five (5) days jointly select the third
arbitrator to comprise the arbitration panel hereunder. The site for any arbitration hereunder shall be in Denver County, Colorado, unless otherwise mutually 

  
 16 

 
agreed by the parties, and the parties hereby waive any objection that the forum is inconvenient. 

(b) The party submitting any matter to arbitration shall do so in accordance with the Rules. Notice to the other
party shall state the question or questions to be submitted for decision or award by arbitration. Notwithstanding any provision of this Section 13.14, the Employee shall be entitled to seek specific performance of the
Employee’s right to be paid during the pendency of any dispute or controversy arising under this Agreement. In order to prevent irreparable harm, the arbitrator may grant temporary or permanent injunctive or other equitable relief for
the protection of property rights. 
 (c) The arbitrator shall set the date, time and place for each
hearing, and shall give the parties advance written notice in accordance with the Rules. Any party may be represented by counsel or other authorized representative at any hearing. The arbitration shall be governed by the
Federal Arbitration Act, 9 U.S.C. Sections 1 et. seq. (or its successor). The arbitrator shall apply the substantive law and the law of remedies, if applicable) of the State of Colorado to the claims asserted to the extent that
the arbitrator determines that federal law is not controlling. 
 (d) (1) Any award of an arbitrator shall
be final and binding upon the parties to such arbitration, and each party shall immediately make such changes in its conduct or provide such monetary payment or other relief as such award requires. The parties agree that the award of
the arbitrator shall be final and binding and shall be subject only to the judicial review permitted by the Federal Arbitration Act. 
 (2) The parties hereto agree that the arbitration award may he entered with any court having jurisdiction and the award may then be enforced as between the parties, without further
evidentiary proceedings, the same as if entered by the court at the conclusion of a judicial proceeding in which no appeal was taken. The Company and the Employee hereby agree that a judgment upon any award rendered by an
arbitrator may be enforced in other jurisdictions by suit on the judgment or in any other manner provided by law. 
 (e) Each party shall pay any monetary amount required by the arbitrator’s award, and the fees, costs and expenses for its own counsel, witnesses and exhibits, unless otherwise determined by
the arbitrator in the award. The compensation and costs and expenses assessed by the arbitrator(s) and the AAA shall be split evenly between the parties unless otherwise determined by the arbitrator in the award. If court
proceedings to stay litigation or compel arbitration are necessary, the party who opposes such proceedings to stay litigation or compel arbitration, if such party is unsuccessful, shall pay all associated costs, expenses, and
attorney’s fees which are reasonably incurred by the other party as determined by the arbitrator. 

  
 17 

 13.15 Tolling. Should the Employee violate any of the terms of the restrictive
covenant obligations articulated herein, the obligation at issue will run from the first date on which the Employee ceases to be in violation of such obligation. 
 13.16 Survival of Certain Provisions. Wherever appropriate to the intention of the parties hereto, the respective rights and obligations of said parties, including, but not limited to,
the rights and obligations set forth in Sections 8 through 11 hereof and this Section 13, shall survive any termination or expiration of this Agreement. 

13.17 No Strict Construction. The Employee represents to the Company that he is knowledgeable and
sophisticated as to business matters, including the subject matter of this Agreement, that he has read the Agreement and that he understands its terms and conditions. The parties hereto agree that the language used in
this Agreement shall be deemed to be the language chosen by them to express their mutual intent, and no rule of strict construction shall be applied against either party hereto. The Employee acknowledges that he has had the
opportunity to consult with counsel of his choice, independent of the counsel for the Company, regarding the terms and conditions of this Agreement and has done so to the extent that he, in his sole discretion, deemed to
be appropriate. 
 13.18 Internal Revenue Code Section 409A Compliance. 

(a) This Agreement is intended to comply with Section 409A of the Code to the extent any payment hereunder constitutes nonqualified
deferred compensation under Section 409A of the Code. 
 (b) The Company shall undertake to administer, interpret, and
construe this Agreement in a manner that does not result in the imposition on the Employee of any additional tax, penalty, or interest under Section 409A of the Code and to comply with Code Section 409A to the extent applicable.

 (c) If the Company determines in good faith that any provision of this Agreement would cause the Employee to incur an
additional tax, penalty, or interest under Section 409A of the Code, the Board (or its delegate) and the Employee shall use reasonable efforts to reform such provision, if possible, in a mutually agreeable fashion to maintain to the maximum
extent practicable the original intent of the applicable provision without violating the provisions of Section 409A of the Code or causing the imposition of such additional tax, penalty, or interest under Section 409A of the Code.

 (d) The preceding provisions, however, shall not be construed as a guarantee by the Company of any particular tax effect to
the Employee under this Agreement. The Company shall not be liable to the Employee for any payment made under this Agreement that is determined to result in an additional tax, penalty, or interest under Section 409A of the Code, nor for
reporting in good faith any payment made under this Agreement as an amount includible in gross income under Section 409A of the Code. 
 (e) With respect to any reimbursement of expenses of the Employee, as specified under this Agreement, such reimbursement of expenses shall be subject to the following conditions: (1) the expenses
eligible for reimbursement in one taxable year shall not 

  
 18 

 
affect the expenses eligible for reimbursement in any other taxable year; (2) the reimbursement of an eligible expense shall be made no later than the end of the year after the year in which
such expense was incurred; and (3) the right to reimbursement shall not be subject to liquidation or exchange for another benefit. 
 (f) “Termination of employment,” “resignation,” or words of similar import, as used in this Agreement means, for purposes of any payments under this Agreement that are payments of
nonqualified deferred compensation subject to Section 409A of the Code, the Employee’s “separation from service” as defined in Section 409A of the Code. 

[Signature page follows] 

  
 19 

 IN WITNESS WHEREOF, the undersigned, intending to be legally bound, have
executed this Agreement as of the date first written above. 
  

	
	Luca Technologies Inc., a Delaware corporation
	
	 By:

	 Name:

	 Title:

	
	 Employee:

	
	  

	 [Name]

  
 20 

 SCHEDULE 2.1 
 Other Permitted Activities 

 EXHIBIT A —RELEASE 

RELEASE OF CLAIMS 
 This Release of all Claims (the “Release”) is entered into by and between LUCA TECHNOLOGIES INC. [OR NAME OF ANY SUCCESSOR ENTITY] (the “Company”) and
                    (“Employee”) and dated as of [INSERT DATE]. 

In consideration of the promises set forth in the employment agreement between the Employee and the Company, dated as of
            , 2011 (the “Agreement”), the Employee and the Company (the “Parties”) hereby agree as follows: 

1. Agreement Entitlements. The Employee’s termination of employment shall be effective as of the Effective Date (defined below).
Consequently, the Company shall provide the Employee the post-termination payments and other benefit to which he would not be entitled under the Agreement, but for the execution of this Release (capitalized terms used herein and not otherwise
defined have the meanings ascribed to them in the Agreement). 
 2. Release of Claims. 

(a) As used in this Release, the term “claims” shall include all claims, covenants, warranties, promises, undertakings,
actions, suits, causes of action, obligations, debts, accounts, attorneys’ fees, judgments, losses and liabilities, of whatsoever kind or nature, in law, equity or otherwise. 

(b) The Employee, for and on behalf of himself and his successors, assigns, legal representatives, heirs, executors and administrators,
does hereby remise, release, absolve and discharge, the Company, its subsidiaries, all of their respective successors and assigns, subsidiaries, Affiliates and legal representatives (in their capacities as such), past and present, and all of their
respective directors, officers, shareholders, members, agents, employees, attorneys, successors, assigns, legal representatives, heirs, executors and administrators, past and present, and each and every one of them, in their individual and corporate
capacities as such (collectively, the “Releasees”) from any and all claims which the Employee had, may have had, or now has against the Company, the Releasees, collectively or any member of the Releasees individually, for or by
reason of any matter, cause or thing whatsoever including any claim arising out of or attributable to the Employee’s employment or the termination of the Employee’s employment with the Company up to and including the Effective Date,
including but not limited to claims of breach of contract, wrongful termination, unjust dismissal, defamation, libel or slander, or under any applicable Federal, state or local law dealing with discrimination based on age, race, sex, national
origin, handicap, religion, disability, sexual preference or any other factor. This release of claims includes, but is not limited to, all claims arising under: the Age Discrimination in Employment Act of 1967 (the “ADEA”, a law
which prohibits discrimination on the basis of age); the National Labor Relations Act; Title VII of the Civil Rights Act of 1964; the Americans with Disabilities Act of 1990; the Civil Rights Act of 1991; the Employee Retirement Income Security Act
of 1974; the Family Medical Leave Act; the Equal Pay Act; all as amended, and all other Federal, state and local labor and anti-discrimination laws, the 

  
 1 

 
common law and any other purported restriction on an employer’s right to terminate the employment of employees. Notwithstanding the foregoing, this Section 2(b) shall not apply
to any claims that arise after the Effective Date or under or are in connection with (i) this Release, (ii) employee benefit plans of general applicability in which the Employee participated as of the Date of Termination, (iii) the
Employee’s rights, if any, to indemnification by the Company under its charter documents, policies or other agreements or applicable law, and (iv) any claim that cannot be waived under applicable state or federal law, such as claims for
any challenge to the validity of the Employee’s release of claims under the ADEA, as set forth in this Release. 
 (c) The
Employee represents that the Employee has not filed or permitted to be filed against the Releasees, any member of the Releasees individually or the Releasees collectively, any complaint, charge, claim, suit, action or proceeding before any local,
state or federal court or other body (each individually, a “Proceeding”). The Employee further represents that the Employee is not aware of any basis on which such a Proceeding could reasonably be instituted. The Employee covenants
and agrees that the Employee will not initiate or cause to be initiated on the Employee’s behalf any Proceeding at any time hereafter with respect to the subject matter of this Release and claims released pursuant to this Release (including,
without limitation, any claims relating to the termination of the Employee’s employment), except as may be necessary to enforce this Release, to obtain benefits described in or granted under this Release, to seek a determination of the validity
of the waiver of the Employee’s rights under the ADEA or as required by law. Except as otherwise provided in the preceding sentence, the Employee will not voluntarily participate in any judicial proceeding of any nature or description against
the Releasees, any member of the Releasees individually or the Releasees collectively as of the Effective Date. The Employee waives any right the Employee may have to benefit in any manner from any relief (whether monetary or otherwise) arising out
of any Proceeding, including any Proceeding conducted by the Equal Employment Opportunity Commission (“EEOC”). Further, the Employee understands that, by executing this Release, the Employee will be limiting the Employee’s
right to pursue certain claims and the availability of certain remedies the Employee may have against the Releasees, any member of the Releasees individually or the Releasees collectively. Notwithstanding the above, nothing in this
Section 2(c) shall prevent the Employee from initiating or participating in an investigation or proceeding conducted by the EEOC. 

3. Older Workers’ Benefit Protection Act. This Release is intended to satisfy the requirements of the Older Workers’ Benefit Protection
Act, 29 U.S.C. sec. 626(f). The Employee is advised to consult with an attorney before executing this Release. 
 (a)
Acknowledgments/Time to Consider. The Employee acknowledges and agrees that (i) the Employee has read and understands the terms of this Release; (ii) the Employee has been advised in writing to consult with an attorney before
executing this Release; (iii) the Employee has obtained and considered such legal counsel as the Employee deems necessary (if any); (iv) the Employee has been given twenty-one (21) days to consider whether or not to enter into this
Release (although the Employee may elect not to use the full 21-day period at the Employee’s option); and (v) by signing this Release, the Employee acknowledges that the Employee does so freely, knowingly and voluntarily. 

(b) Revocation/Effective Date. This Release shall not become effective or enforceable until the eighth
(8th) day after the Employee signs this Release. In
other words, the 

  
 2 

 
Employee may revoke his acceptance of this Release within seven (7) days after the date the Employee signs it. The Employee’s revocation must be in writing and received by the Vice
President of Administration and Human Resources by 5:00 p.m. Mountain Time on the seventh day in order to be effective. If the Employee does not revoke acceptance within the seven (7) day period, the Employee’s acceptance of this
Release shall become binding and enforceable on the eighth day after the Employee signs it (the “Effective Date”). The severance payments under the Agreement will become due and payable on the Effective Date, provided the Employee
does not revoke. 
 (c) Preserved Rights of Employee. This Release does not waive or release any rights or claims that
the Employee may have under the ADEA that arise after the date the Employee signs this Release. In addition, this Release does not prohibit the Employee from challenging the validity of this Release’s waiver and release of claims under the
ADEA. 
 4. Cooperation. The Employee agrees, for a period of three years from the date hereof, to cooperate fully with the Company and
its subsidiaries, Affiliates, auditors, attorneys, insurance companies and agents, at the Company’s expense, concerning requests for information about the business of the Company or its subsidiaries or Affiliates or the Employee’s
involvement and participation therein; the defense or prosecution of any claims or actions now in existence or which may be brought in the future against or on behalf of the Company or its subsidiaries or Affiliates which relate to events or
occurrences that transpired while the Employee was employed by the Company; and in connection with any investigation or review by any federal, state or local regulatory, quasi-regulatory or self-governing authority as any such investigation or
review relates to events or occurrences relating to business matters or other work-related issues that transpired while the Employee was employed by the Company. The Employee’s full cooperation shall include, but not be limited to, being
available to meet and speak with officers or employees of the Company and/or its counsel at reasonable times and locations, executing accurate and truthful documents and taking such other actions as may reasonably be requested by the Company and/or
its counsel to effectuate the foregoing. 
 5. Miscellaneous. 
 (a) Notices. All notices, requests, demands and other communications hereunder shall be given in accordance with the notice provisions contained in Section 13.1 of the Agreement.

 (b) Successors. This Release shall be binding upon and inure to the benefit of the Parties, their respective heirs,
successors and assigns. 
 (c) Taxes. The Company shall withhold from any amounts payable under this Release such taxes
as may be required to be withheld pursuant to any applicable law or regulation. 
 (d) Severability. In the event that
any provision of this Release is determined to be invalid or unenforceable, the remaining terms and conditions of this Release shall be unaffected and shall remain in full force and effect. In addition, if any provision is determined to be invalid
or unenforceable due to its duration and/or scope, the duration and/or scope of such provision, as the case may be, shall be reduced, such reduction shall be to the smallest extent necessary to comply with applicable law, and such provision shall be
enforceable, in its reduced form, to the fullest extent permitted by applicable law. 

  
 3 

 (e) Non-Admission. Nothing contained in this Release shall be deemed or construed as
an admission of wrongdoing or liability on the part of the Employee or on the part of the Company. 
 (f) Non-Waiver. A
failure of either the Employee or any of the Releasees to insist on strict compliance with any provision of this Release shall not be deemed a waiver of such provision or any other provision hereof. 

(g) Governing Law. The validity, interpretations, construction and performance of this Release shall be governed by the laws of
the State of Colorado without giving effect to conflict of laws principles. 
 (h) Headings. The headings of the sections
contained in this Release are for convenience of reference only and shall not be deemed to control or affect the meaning or construction of any provision of this Release. 
 (i) Counterparts. This Release may be executed by one or more of the Parties hereto on any number of separate counterparts and all such counterparts shall be deemed to be one and the same
instrument. Each party hereto confirms that any facsimile copy of such party’s executed counterpart of this Release (or its signature page thereof) shall be deemed to be an executed original thereof. 

[Signature page follows] 

  
 4 

 IN WITNESS WHEREOF, the Employee has hereunto set his hand as of the date first written
above. 
  

			
	 Luca Technologies Inc., a Delaware corporation

		
	 By:
	 	  

	 Name:

	 Title:

	
	 Employee:

 

	 [Name]

  
 5

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