Form of Lock-Up Agreement

Exhibit 10.4

LOCK-UP AGREEMENT

THIS LOCK-UP AGREEMENT (this “Agreement”) is made and entered into as of February 16, 2021, by and among Artius Acquisition Inc., a Cayman Islands exempted company (which shall domesticate as a Delaware corporation prior to the Closing (as defined in the Merger Agreement, defined below)) (the “Company”), Artius Acquisition Partners LLC, a Delaware limited liability company (the “Sponsor”), and each of the stockholder parties listed on Schedule A attached hereto (collectively, the “Company Stockholders”). Capitalized terms used but not otherwise defined in this Agreement have the meaning ascribed to such term in the Agreement and Plan of Merger and Reorganization, dated as of February 16, 2021, by and among the Company, Micromidas, Inc. and Zero Carbon Merger Sub Inc., a Delaware corporation and a wholly owned subsidiary of Artius (as it may be amended or supplemented from time to time, the “Merger Agreement”). The Sponsor, the Company Stockholders and any person or entity who hereafter becomes a party to this Agreement pursuant to Section 1 are referred to herein, individually, as a “Holder” and, collectively, as the “Holders.” Capitalized terms used but not defined herein shall have the respective meanings ascribed to such terms in the Merger Agreement.

WHEREAS, pursuant to the Merger Agreement, and in view of the valuable consideration to be received by the parties thereunder, the parties desire to enter into this Agreement, pursuant to which the Restricted Securities (as defined below) shall become subject to limitations on disposition as set forth herein.

NOW, THEREFORE, in consideration of the premises set forth above, which are incorporated in this Agreement as if fully set forth below, and intending to be legally bound hereby, the parties hereby agree as follows:

1. Lock-Up Provisions.

(a) The Holders hereby agree not to Transfer, in whole or in part, the Restricted Securities, whether any such transaction is to be settled by delivery of Restricted Securities or other securities, in cash or otherwise, during the period commencing from the Closing and through the earliest to occur of: (i) 365 days after the date of the Closing; (ii) the first day after the date on which the closing price of the Class A Common Stock equals or exceeds $12.00 per share (as adjusted for stock splits, stock dividends, reorganizations, recapitalizations and the like) for any 20 trading days within any 30-trading day period commencing at least 150 days after the date of the Closing; or (iii) the date on which the Company completes a liquidation, merger, capital stock exchange, reorganization or other similar transaction that results in all of the Company’s public stockholders having the right to exchange their Class A Common Stock for cash, securities or other property (the “Lock-Up Period”).

(b) As used in this Agreement, “Restricted Securities” shall mean (i) any shares of Class A Common Stock held by the Holders immediately after the Effective Time, (ii) any securities convertible into or exercisable or exchangeable for Class A Common Stock, including the Artius Private Warrants, held by the Holders immediately after the Effective Time, and (iii) any shares of Class A Common Stock issued upon conversion, exercise or exchange of any of the securities described in clause (ii) during the Lock-Up Period.

(c) Notwithstanding the foregoing, Transfers of the Restricted Securities are permitted:

(A) to the Company, the Company’s officers or directors, any affiliates or family members of any of the Company’s officers or directors, any members of the Sponsor, any affiliates of the Sponsor;

(B) in the case of an entity, (A) to another entity that is an affiliate of the Holder, or to any investment fund or other entity controlling, controlled by, managing or managed by or under common control with the Holder or affiliates of the Holder or who shares a common investment advisor with the Holder or (B) as part of a distribution to members, partners or shareholders of the Holder;

(C) in the case of an individual, by gift to a member of the individual’s immediate family, to a trust, the beneficiary of which is a member of the individual’s immediate family or an affiliate of such person, or to a charitable organization;

(D) in the case of an individual, by virtue of laws of descent and distribution upon death of the individual;

(E) in the case of an individual, pursuant to a court order, such as a qualified domestic relations order, divorce decree or separation agreement;

(F) in the case of an individual, to a partnership, limited liability company or other entity of which the individual and/or the immediate family of the individual are the legal and beneficial owner of all of the outstanding equity securities or similar interests;

(G) to a nominee or custodian holding securities on behalf of a beneficial owner to whom a disposition or transfer would be permissible under clauses (A) through (F) above;

(H) in the case of an entity that is a trust, Transfers to a trustor or beneficiary of the trust or to the estate of a beneficiary of such trust;

(I) in the case of an entity, Transfers by virtue of the laws of the state of the entity’s organization and the entity’s organizational documents upon dissolution of the entity;

2

(J) in connection with any bona fide mortgage, encumbrance or pledge to a financial institution in connection with any bona fide loan or debt transaction or enforcement thereunder, including foreclosure thereof;

(K) the entry, by the Holder, at any time after the effective time of the Merger, of any trading plan providing for the sale of shares of Restricted Securities by the Holder, which trading plan meets the requirements of Rule 10b5-1(c) under the Exchange Act, provided, however, that such plan does not provide for, or permit, the sale of any shares of Holder during the Lock-Up Period and no public announcement or filing is voluntarily made or required regarding such plan during the Lock-Up Period;

(L) in connection with a liquidation, merger, stock exchange, reorganization, tender offer or other similar transaction which results in all of the Company’s stockholders having the right to exchange their shares of Class A Common Stock for cash, securities or other property subsequent to the Closing Date; or

(M) to satisfy any U.S. federal, state, or local income tax obligations of the Holder (or its direct or indirect owners) arising from a change in the U.S. Internal Revenue Code of 1986, as amended (the “Code”), or the U.S. Treasury Regulations promulgated thereunder (the “Regulations”) after the date on which the Merger Agreement was executed by the parties, and such change prevents the Merger from qualifying as a “reorganization” pursuant to Section 368 of the Code (and the Merger does not qualify for similar tax-free treatment pursuant to any successor or other provision of the Code or Regulations taking into account such changes), in each case solely and to the extent necessary to cover any tax liability as a direct result of the transaction.

provided, however, that in the case of clauses (A) through (J), these permitted transferees must enter into a written agreement, in substantially the form of this Agreement (it being understood that any references to “immediate family” in the agreement executed by such transferee shall expressly refer only to the immediate family of the Holder and not to the immediate family of the transferee), agreeing to be bound by these Transfer restrictions. For purposes of this paragraph, “immediate family” shall mean a spouse, domestic partner, child (including by adoption), father, mother, brother or sister of the undersigned, and lineal descendant (including by adoption) of the undersigned or of any of the foregoing persons; and “affiliate” shall have the meaning set forth in Rule 405 under the Securities Act of 1933, as amended.

As used in this Agreement, the term “Transfer” shall mean the (i) sale or assignment of, offer to sell, contract or agreement to sell, hypothecate, pledge, grant of any option, right or warrant to purchase or otherwise dispose of or agreement to dispose of, directly or indirectly, or establishment or increase of a put equivalent position or liquidation with respect to or decrease of a call equivalent position within the meaning of Section 16 of the Securities Exchange Act of 1934, as amended, and the rules and regulations of the Securities and Exchange Commission promulgated thereunder with respect to, any security, (ii) entry into any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of any security, whether any such transaction is to be settled by delivery of such securities, in cash or otherwise, or (iii) public announcement of any intention to effect any transaction specified in clause (i) or (ii).

3

The Holders further agree to execute such agreements as may be reasonably requested by the Company that are consistent with the foregoing or that are necessary to give further effect thereto.

(d) If any Transfer prohibited by Section 1 of this Agreement is made or attempted contrary to the provisions of this Agreement, such purported Transfer shall be null and void ab initio, and the Company shall refuse to recognize any such purported transferee of the Restricted Securities as one of its equity holders for any purpose. In order to enforce this Section 1, the Company may impose stop-transfer instructions with respect to the Restricted Securities (and permitted transferees and assigns thereof) until the end of the Lock-Up Period.

(e) During the Lock-Up Period, each certificate or book-entry position evidencing any Restricted Securities shall be marked with a legend in substantially the following form, in addition to any other applicable legends:

“THE SECURITIES REPRESENTED HEREBY ARE SUBJECT TO RESTRICTIONS ON TRANSFER SET FORTH IN A LOCK-UP AGREEMENT, DATED AS OF FEBRUARY 16, 2021, BY AND AMONG THE ISSUER OF SUCH SECURITIES AND THE REGISTERED HOLDER OF THE SECURITIES (OR THE PREDECESSOR IN INTEREST TO THE SECURITIES). A COPY OF SUCH LOCK-UP AGREEMENT WILL BE FURNISHED WITHOUT CHARGE BY THE ISSUER TO THE HOLDER HEREOF UPON WRITTEN REQUEST.”

(f) For the avoidance of doubt, each Holder shall retain all of its rights as a shareholder of the Company with respect to the Restricted Securities during the Lock-Up Period, including the right to vote any Restricted Securities that are entitled to vote.

(g) The lock-up provisions in Section 7 of the Letter Agreement, dated as of July 13, 2020, by and among the Company, the Sponsor and certain Insiders (as defined therein) signatory thereto, shall terminate and be of no further force or effect upon the effectiveness of the lock-up provisions of this Agreement.

2. Miscellaneous.

(a) Binding Effect; Assignment. This Agreement and all of the provisions hereof shall be binding upon and inure to the benefit of the parties hereto and their respective permitted successors and assigns. This Agreement and all obligations of a Holder are personal to such Holder and may not be transferred or delegated at any time.

(b) Third Parties. Nothing contained in this Agreement shall be construed to confer upon any person who is not a signatory hereto any rights or benefits, as a third party beneficiary or otherwise.

4

(c) Governing Law; Venue. This Agreement shall be governed by and construed in accordance with the internal laws of the State of Delaware (without reference to its choice of law rules that would require the application of the laws of another jurisdiction). Each party hereto hereby irrevocably and unconditionally (a) agrees that all claims or causes of action based upon, arising out of, or related to this Agreement or the transactions contemplated hereby, shall only be brought in the Court of Chancery of the State of Delaware (or, if the Court of Chancery of the State of Delaware lacks subject matter jurisdiction, then in the applicable Delaware state court), or if under applicable law exclusive jurisdiction of such claim or cause of action is vested in the federal courts, then the United States District Court for the District of Delaware, (b) expressly submits to the personal jurisdiction and venue of such courts for the purposes thereof, and (c) waives and agrees not to raise (by way of motion, as a defense or otherwise) any and all jurisdictional, venue and convenience objections or defenses that such party may have in such action or proceeding.

(d) WAIVER OF JURY TRIAL. EACH OF THE PARTIES HERETO HEREBY WAIVES TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW ANY RIGHT IT MAY HAVE TO A TRIAL BY JURY WITH RESPECT TO ANY LITIGATION DIRECTLY OR INDIRECTLY ARISING OUT OF, UNDER OR IN CONNECTION WITH THIS AGREEMENT OR THE TRANSACTIONS CONTEMPLATED HEREBY. EACH OF THE PARTIES HERETO (A) CERTIFIES THAT NO REPRESENTATIVE, AGENT OR ATTORNEY OF ANY OTHER PARTY HERETO HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PARTY WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THAT FOREGOING WAIVER AND (B) ACKNOWLEDGES THAT IT AND THE OTHER PARTIES HERETO HAVE BEEN INDUCED TO ENTER INTO THIS AGREEMENT BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS IN THIS SECTION 2(D).

(e) Interpretation. The titles and subtitles used in this Agreement are for convenience only and are not to be considered in construing or interpreting this Agreement. In this Agreement, unless the context otherwise requires: (i) 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; (ii) “including” (and with correlative meaning “include”) means including without limiting the generality of any description preceding or succeeding such term and shall be deemed in each case to be followed by the words “without limitation”; (iii) the words “herein,” “hereto,” and “hereby” and other words of similar import in this Agreement shall be deemed in each case to refer to this Agreement as a whole and not to any particular section or other subdivision of this Agreement; and (iv) the term “or” means “and/or”. The parties have participated jointly in the negotiation and drafting of this Agreement. Consequently, in the event an ambiguity or question of intent or interpretation arises, this Agreement shall be construed as if drafted jointly by the parties hereto, and no presumption or burden of proof shall arise favoring or disfavoring any party by virtue of the authorship of any provision of this Agreement.

(f) Notices. Any notice or communication under this Agreement must be in writing and given by (i) deposit in the United States mail, addressed to the party to be notified, postage prepaid and registered or certified with return receipt requested, (ii) delivery in person or by courier service providing evidence of delivery, or (iii) transmission by hand delivery,

5

electronic mail or facsimile. Each notice or communication that is mailed, delivered, or transmitted in the manner described above shall be deemed sufficiently given, served, sent, and received, in the case of mailed notices, on the third Business Day following the date on which it is mailed and, in the case of notices delivered by courier service, hand delivery, electronic mail or facsimile, at such time as it is delivered to the addressee (with the delivery receipt or the affidavit of messenger) or at such time as delivery is refused by the addressee upon presentation. Any notice or communication under this Agreement must be addressed, if to the Company, to: Artius Acquisition Inc., 3 Columbus Circle, Suite 2215, New York, NY 10019, Attention: H. Boon Sim, Email: ***@***, and, if to any Holder, at such Holder’s address, electronic mail address or facsimile number as set forth in the Company’s books and records. Any party may change its address for notice at any time and from time to time by written notice to the other parties hereto, and such change of address shall become effective thirty (30) days after delivery of such notice as provided in this paragraph (f).

(g) Amendments and Waivers. Only upon the approval by a majority of the members of the Board of Directors of the Company then in office that qualify as “independent” for purposes of audit committee membership under Section 10A-3 under the Exchange Act of 1934, as amended, compliance with any of the provisions, covenants and conditions set forth in this Agreement may be waived by the Company, or any of such provisions, covenants or conditions may be amended or modified; provided, however, that notwithstanding the foregoing, any amendment hereto or waiver hereof that adversely affects one Holder, solely in its capacity as a holder of Restricted Securities, shall require the consent of the Holder so affected. No course of dealing between any Holder or the Company and any other party hereto or any failure or delay on the part of a Holder or the Company in exercising any rights or remedies under this Agreement shall operate as a waiver of any rights or remedies of any Holder or the Company. No single or partial exercise of any rights or remedies under this Agreement by a party shall operate as a waiver or preclude the exercise of any other rights or remedies hereunder or thereunder by such party.

(h) Severability. If any provision of this Agreement shall be invalid, illegal or unenforceable, the validity, legality and enforceability of the remaining provisions shall not in any way be affected or impaired thereby.

(i) Specific Performance. Each Holder acknowledges that its obligations under this Agreement are unique, recognizes and affirms that in the event of a breach of this Agreement by such Holder, money damages will be inadequate and the Company will have no adequate remedy at law, and agrees that irreparable damage would occur in the event that any of the provisions of this Agreement were not performed by such Holder in accordance with their specific terms or were otherwise breached. Accordingly, the Company shall be entitled to an injunction or restraining order to prevent breaches of this Agreement by a Holder and to enforce specifically the terms and provisions hereof, without the requirement to post any bond or other security or to prove that money damages would be inadequate, this being in addition to any other right or remedy to which such party may be entitled under this Agreement, at law or in equity.

6

(j) Entire Agreement. This Agreement constitutes the full and entire understanding and agreement among the parties with respect to the subject matter hereof, and any other written or oral agreement relating to the subject matter hereof existing between the parties is expressly terminated; provided, that, for the avoidance of doubt, the foregoing shall not affect the rights and obligations of the parties under the Merger Agreement or any documents related thereto or referred to therein. Notwithstanding the foregoing, nothing in this Agreement shall limit any of the rights or remedies of the Company or any of the obligations of any of the Holders under any other agreement between any of the Holders and the Company or any certificate or instrument executed by any of the Holders in favor of the Company, and nothing in any other agreement, certificate or instrument shall limit any of the rights or remedies of the Company or any of the obligations of any of the Holders under this Agreement.

(k) Further Assurances. From time to time, at another party’s request and without further consideration (but at the requesting party’s reasonable cost and expense), each party shall execute and deliver such additional documents and take all such further action as may be reasonably necessary to consummate the transactions contemplated by this Agreement.

(l) Counterparts. This Agreement may be executed in multiple counterparts (including facsimile or PDF counterparts), each of which shall be deemed an original, and all of which together shall constitute the same instrument, but only one of which need be produced.

[Remainder of Page Intentionally Left Blank; Signature Pages Follow]

7

IN WITNESS WHEREOF, the parties have executed this Lock-Up Agreement as of the date first written above.

[Signature Page to Lock-Up Agreement]

[Signature Page to Lock-Up Agreement]

SCHEDULE A