Spyre Therapeutics S1/A IPO registration (amended) | SYRE 15 Nov 23

Exhibit 4.1

Execution Version

SECURITIES PURCHASE AGREEMENT

This SECURITIES PURCHASE AGREEMENT (this “Agreement”) is dated as of June 22, 2023, by and among AEGLEA BIOTHERAPEUTICS, INC., a Delaware corporation (the “Company”), and each purchaser identified on Annex A hereto (each, including its successors and assigns, a “Purchaser” and collectively, the “Purchasers”).

RECITALS

A. The Company and each Purchaser is executing and delivering this Agreement in reliance upon the exemption from securities registration afforded by Section 4(a)(2) of the Securities Act of 1933, as amended, and the rules and regulations thereunder (the “Securities Act”), and Rule 506 of Regulation D (“Regulation D”) as promulgated by the United States Securities and Exchange Commission (the “Commission”) under the Securities Act.

B. Each Purchaser, severally and not jointly, wishes to purchase, and the Company wishes to issue and sell, upon the terms and conditions stated in this Agreement, an aggregate of 721,452 shares (the “Securities”) of Series A Non-Voting Convertible Preferred Stock, par value $0.0001 per share (and including any other class of securities into which the Series A Preferred Stock may hereafter be reclassified or changed into, the “Series A Preferred Stock”) of the Company, having the designation, preferences, conversion or other rights, voting powers, restrictions, limitations as to dividends, qualifications and terms and conditions as specified in the Certificate of Designation, in the form attached hereto as Exhibit A (the “Certificate of Designation”), which will be convertible into shares (the “Conversion Shares”) of the Company’s common stock, par value $0.0001 per share (“Common Stock”), in accordance with the terms set forth in the Certificate of Designation.

C. Pursuant to the terms and conditions of the Certificate of Designation, the conversion of the Series A Preferred Stock shall be subject to receipt of the Requisite Stockholder Approval (as defined herein).

D. The Company has engaged Jefferies LLC; Cowen and Company, LLC; Stifel, Nicolaus & Company, Incorporated; and Guggenheim Securities, LLC as its exclusive placement agents (the “Placement Agents”) for the offering of the Securities on a “best efforts” basis.

E. Concurrently with the execution and delivery of this Agreement, the Company is entering into an Agreement and Plan of Merger by and among the Company, Aspen Merger Sub I, Inc., a Delaware corporation and wholly owned subsidiary of Parent (the “First Merger Sub”), Sequoia Merger Sub II, LLC, a Delaware limited liability company and wholly owned subsidiary of Parent (the “Second Merger Sub”), and Spyre Therapeutics, Inc. (“Spyre”), in substantially the form attached hereto as Exhibit G attached hereto (the “Merger Agreement”), pursuant to which the Company and Spyre intend to effect a merger of First Merger Sub with and into Spyre (the “First Merger”). Upon consummation of the First Merger, the First Merger Sub will cease to exist and Spyre will become a wholly-owned subsidiary of the Company. Immediately following the First Merger and as part of the same overall transaction as the First Merger, Spyre will merge with and into Second Merger Sub (the “Second Merger” and, together with the First Merger, the “Merger”), with Second Merger Sub being the surviving entity of the Second Merger.

F. Prior to the Closing: (i) the parties hereto shall execute and deliver a Registration Rights Agreement, substantially in the form attached hereto as Exhibit B (the “Registration Rights Agreement”), pursuant to which, among other things, the Company will agree to provide certain registration rights with

respect to the Conversion Shares under the Securities Act and the rules and regulations promulgated thereunder and applicable state securities laws and (ii) the Company shall file with the Delaware Secretary of State the Certificate of Designation, duly executed by an officer of the Company.

NOW, THEREFORE, in consideration of the mutual covenants contained in this Agreement, and for other good and valuable consideration, the receipt and adequacy of which are hereby acknowledged, the Company and each Purchaser, severally and not jointly, hereby agree as follows:

ARTICLE 1

DEFINITIONS

1.1 Definitions. In addition to the terms defined elsewhere in this Agreement, for all purposes of this Agreement, the following terms shall have the meanings indicated in this Section 1.1:

“Acquiring Person” has the meaning set forth in Section 4.5.

“Action” means any action, suit, inquiry, notice of violation, proceeding (including any partial proceeding such as a deposition) or investigation pending or, to the Company’s Knowledge, threatened against the Company, its Subsidiaries or any of their respective properties, or any officer, director or employee of the Company or any of its Subsidiaries acting in his or her capacity as an officer, director or employee, before or by any federal, state, county, local or foreign court, arbitrator, governmental or administrative agency, regulatory authority, stock market, stock exchange or trading facility.

“Affiliate” means, with respect to any Person, any other Person that, directly or indirectly through one or more intermediaries, Controls, is controlled by or is under common control with such Person, as such terms are used in and construed under Rule 405 under the Securities Act.

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

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

“Business Day” means any day except Saturday, Sunday, any day which is a federal legal holiday in the United States or any day on which banking institutions in the State of New York are authorized or required by law or other governmental action to close.

“Certificate of Designation” has the meaning set forth in the Recitals.

“Closing” has the meaning set forth in Section 2.2(a).

“Code” means the Internal Revenue Code of 1986, as amended.

“Commission” has the meaning set forth in the Recitals.

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

“Company Counsel” means Cooley LLP, with offices at 110 N. Upper Wacker Dr., Suite 4200, Chicago, IL 60606.

“Company Deliverables” has the meaning set forth in Section 2.3(a).

“Company’s Knowledge” means with respect to any statement made to the Company’s Knowledge, that the statement is based upon the actual knowledge, or knowledge that would have been acquired after reasonable inquiry, of the executive officers or directors of the Company having responsibility for the matter or matters that are the subject of the statement. With respect to any matters relating to Intellectual Property, such awareness or reasonable expectation to have knowledge does not require any such individual to conduct or have conducted or obtain or have obtained any freedom to operate opinions of counsel or any Intellectual Property rights clearance searches.

“Contract” means, with respect to any Person, any written or oral agreement, contract, subcontract, lease (whether for real or personal property), mortgage, license, or other legally binding commitment or undertaking of any nature to which such Person is a party or by which such Person or any of its assets are bound or affected under applicable Law.

“Control” (including the terms “controlling”, “controlled by” or “under common control with”) means the possession, direct or indirect, of the power to direct or cause the direction of the management and policies of a Person, whether through the ownership of voting securities, by Contract or otherwise.

“Effect” means any effect, change, event, circumstance, state of fact, occurrence or development.

“Effective Date” means the date on which the initial Registration Statement required by Section 2(a) of the Registration Rights Agreement is first declared effective by the Commission.

“Employee Plan” means any “employee benefit plan” as defined in Section 3(3) of ERISA and any other pension, retirement, deferred compensation, excess benefit, profit-sharing, bonus, incentive, equity or equity-based, phantom equity, employment, consulting, severance, change-of-control, retention, health, life, disability, group insurance, paid time off, holiday, welfare and fringe benefit plan, program, agreement, Contract, or arrangement (whether written or unwritten, qualified or nonqualified, funded or unfunded, subject or not subject to ERISA and including any that have been frozen) that the Company or any of its Subsidiaries (i) sponsors, maintains, administers, or contributes to, (ii) provides benefits under or through, (iii) has any obligation to contribute to or provide benefits under or through, (iv) with respect to which have any liability, or (v) utilizes to provide benefits to or otherwise cover any current or former employee, officer, director or other service provider of the Company or any of its Subsidiaries (or their spouses, dependents, or beneficiaries).

“Encumbrance” means any lien, pledge, hypothecation, charge, mortgage, security interest, lease, exclusive license, option, easement, reservation, servitude, adverse title, claim, infringement, interference, option, right of first refusal, preemptive right, community property interest or restriction or encumbrance of any nature (including any restriction on the voting of any security, any restriction on the transfer of any security or other asset, any restriction on the receipt of any income derived from any asset, any restriction on the use of any asset and any restriction on the possession, exercise or transfer of any other attribute of ownership of any asset).

“Environmental Laws” has the meaning set forth in Section 3.1(dd).

“ERISA” means the Employee Retirement Income Security Act of 1974, as amended.

“Exchange Act” means the Securities Exchange Act of 1934, as amended, or any successor statute, and the rules and regulations promulgated thereunder.

“GAAP” means generally accepted accounting principles and practices in effect from time to time within the United States applied consistently throughout the period involved.

“Governmental Authority” means any: (a) nation, state, commonwealth, province, territory, county, municipality, district or other jurisdiction of any nature, (b) federal, state, local, municipal, foreign, supra-national or other government, (c) governmental or quasi-governmental authority of any nature (including any governmental division, department, agency, commission, bureau, instrumentality, official, ministry, fund, foundation, center, organization, unit, body or entity and any court or other tribunal, and any taxing authority) or (d) self-regulatory organization (including Nasdaq).

“Hazardous Materials” means any pollutant, chemical, substance and any toxic, infectious, carcinogenic, reactive, corrosive, ignitable or flammable chemical, or chemical compound, or hazardous substance, material or waste, whether solid, liquid or gas, that is subject to regulation, control or remediation under any Environmental Law, including without limitation, crude oil or any fraction thereof, and petroleum products or by-products.

“Intellectual Property” has the meaning set forth in Section 3.1(p).

“Irrevocable Transfer Agent Instructions” means, with respect to the Company, the Irrevocable Transfer Agent Instructions, in substantially the form of Exhibit D, executed by the Company and delivered to and acknowledged in writing by the Transfer Agent.

“Law” means any federal, state, national, supra-national, foreign, local or municipal or other law, statute, constitution, principle of common law, resolution, ordinance, code, edict, decree, rule, regulation, ruling, order, judgment or requirement issued, enacted, adopted, promulgated, implemented or otherwise put into effect by or under the authority of any Governmental Authority (including under the authority of Nasdaq or the Financial Industry Regulatory Authority, Inc.).

“Material Adverse Effect” means any Effect, individually or together with any other Effect, that (a) has had, has, or would reasonably be expected to have a material adverse effect on the business, condition (financial or otherwise), general affairs, management, assets, liabilities, results of operations, earnings, prospects or properties of the Company or its Subsidiaries, taken as a whole; provided, however, that Effects arising or resulting from the following shall not be taken into account in determining whether there has been a Material Adverse Effect: (1) the announcement or disclosure of the sale of the Securities or other transactions contemplated by this Agreement, (2) the taking of any action, or the failure to take any action, by the Company that is required to comply with the terms of this Agreement, (3) any natural disaster or epidemics, pandemics or other force majeure events, or any act or threat of terrorism or war, any armed hostilities or terrorist activities (including any escalation or general worsening of any of the foregoing) anywhere in the world or any governmental or other response or reaction to any of the foregoing, (4) any change in GAAP or applicable Law or the interpretation thereof, (5) general economic or political conditions or conditions generally affecting the industries in which the Company and its Subsidiaries operate or (6) any change in the cash position of the Company and its Subsidiaries which results from operations in the ordinary course of business; except in each case with respect to clauses (3), (4) and (5), (x) to the extent disproportionately affecting the Company and its Subsidiaries, taken as a whole, relative to other similarly situated companies in the industries in which the Company and its Subsidiaries operate and (y) the underlying cause of such Effect may be considered except to the extent such underlying cause would otherwise be excluded in accordance with the foregoing; or (b) prevents, materially adversely delays or materially adversely impedes, or could reasonably be expected to prevent, materially adversely delay or materially adversely impede the performance by the Company of its obligations under this Agreement and the other Transaction Documents, including, without limitation, the issuance and sale of the Securities and the Conversion Shares.

“Nasdaq” means The Nasdaq Stock Market.

“New York Courts” means the state and federal courts sitting in the City of New York, Borough of Manhattan.

“Outside Date” means the fifteenth (15^th) day following the date of this Agreement.

“Permitted Encumbrances” means: (a) any Encumbrance for current taxes not yet due and payable or for taxes that are being contested in good faith and, in each case, for which adequate reserves have been made on the Unaudited Interim Balance Sheet in accordance with GAAP; (b) minor liens that have arisen in the ordinary course of business and that do not (individually or in the aggregate) materially detract from the value of the assets or properties subject thereto or materially impair the operations of the Company or any of its Subsidiaries; (c) statutory liens to secure obligations to landlords, lessors or renters under leases or rental agreements; (d) deposits or pledges made in connection with, or to secure payment of, workers’ compensation, unemployment insurance or similar programs mandated by Law; (e) non-exclusive licenses of Intellectual Property rights granted by the Company or any of its Subsidiaries in the ordinary course of business and that do not (individually or in the aggregate) materially detract from the value of the Intellectual Property rights subject thereto; and (f) statutory liens in favor of carriers, warehousemen, mechanics and materialmen, to secure claims for labor, materials or supplies.

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

“Placement Agents” has the meaning set forth in the Recitals.

“Press Release” has the meaning set forth in Section 4.4.

“Principal Trading Market” means the Trading Market on which the Common Stock is primarily listed on and quoted for trading, which, as of the date of this Agreement and the Closing Date, shall be the Nasdaq Global Market.

“Proceeding” means an action, claim, suit, investigation or proceeding (including, without limitation, an investigation or partial proceeding, such as a deposition), whether commenced or threatened.

“Purchaser” or “Purchasers” has the meaning set forth in the Preamble.

“Purchaser Deliverables” has the meaning set forth in Section 2.2(b).

“Registrable Securities” has the meaning set forth in the Registration Rights Agreement.

“Registration Rights Agreement” has the meaning set forth in the Recitals.

“Registration Statement” means a registration statement meeting the requirements set forth in the Registration Rights Agreement and covering the resale by the Purchasers of the Registrable Securities.

“Regulation D” has the meaning set forth in the Recitals.

“Rule 144” means Rule 144 promulgated by the Commission pursuant to the Securities Act, as such Rule may be amended from time to time, or any similar rule or regulation hereafter adopted by the Commission having substantially the same effect as such Rule.

“SEC Reports” has the meaning set forth in Section 3.1(h).

“Secretary’s Certificate” has the meaning set forth in 2.3(a)(vi).

“Securities” has the meaning set forth in the Recitals.

“Securities Act” has the meaning set forth in the Recitals.

“Series A Preferred Stock” has the meaning set forth in the Recitals, and also includes any other class of securities into which the Series A Preferred Stock may hereafter be reclassified or changed into.

“Short Sales” include, without limitation, (i) all “short sales” as defined in Rule 200 promulgated under Regulation SHO under the Exchange Act, whether or not against the box, and all types of direct and indirect stock pledges, forward sale contracts, options, puts, calls, short sales, swaps, “put equivalent positions” (as defined in Rule 16a-1(h) under the Exchange Act) and similar arrangements (including on a total return basis), and (ii) sales and other transactions through non-U.S. broker dealers or non-U.S. regulated brokers (but shall not be deemed to include the location and/or reservation of borrowable shares of Common Stock).

“Subscription Amount” means, with respect to each Purchaser, the aggregate amount to be paid for the Securities purchased hereunder as indicated on Annex A opposite such Purchaser’s name, in United States dollars and in immediately available funds, which amount represents the number of Securities being purchased by such Purchaser multiplied by the per Security price of $291.08.

“Subsidiary” means any subsidiary of the Company and shall include any subsidiary of the Company formed or acquired on or after the date hereof, including Spyre.

“Support Agreement” means each Parent Stockholder Support Agreement (as defined in the Merger Agreement).

“Trading Day” means a day on which the principal Trading Market is open for business.

“Trading Market” means any of the following markets or exchanges on which the Common Stock is listed or quoted for trading on the date in question: the NYSE American, the Nasdaq Capital Market, the Nasdaq Global Market, the Nasdaq Global Select Market, or the New York Stock Exchange (or any successors to any of the foregoing).

“Transaction Documents” means this Agreement, the schedules and exhibits attached hereto, the Registration Rights Agreement, the Certificate of Designation, the Irrevocable Transfer Agent Instructions and any other documents or agreements explicitly contemplated hereunder.

“Transfer Agent” means American Stock Transfer & Trust Company, LLC, the current transfer agent of the Company, or any successor transfer agent for the Company.

“Unaudited Interim Balance Sheet” means the unaudited condensed consolidated balance sheets of the Company and its Subsidiaries as of March 31, 2023 included in the Company’s Quarterly Report on Form 10-Q filed with the Commission on May 11, 2023.

ARTICLE 2

PURCHASE AND SALE

2.1 Purchase and Sale. On the Closing Date, upon the terms and subject to the conditions set forth herein, the Company will issue and sell to the Purchasers, and the Purchasers will purchase, severally and not jointly, the number of Securities set forth opposite the names of each such Purchaser under the heading “Number of Securities Purchased” for the Subscription Amount set forth on Annex A attached hereto.

2.2 Closing.

(a) Closing. Upon the satisfaction or waiver of the conditions set forth in Section 2.1, Section 2.2 and Article 5, the closing of the purchase and sale of the Securities (the “Closing”) shall take place remotely via exchange of executed documents and funds on the second (2^nd) Business Day after the date hereof (the “Closing Date”), or at such other time and place as mutually agreed by the Company and Purchasers, but in no event later than the 15th (fifteenth) Business Day following the date of this Agreement.

(b) Payment. On or prior to the Closing Date, each Purchaser shall deliver to the Company the Subscription Amount via wire transfer of immediately available funds to an account designated in writing by the Company or by other means approved by the Company on or prior to the Closing Date. At the Closing, the Company shall deliver to such Purchaser against payment a book-entry statement (or, if requested by the Purchaser, a certificate) from the Transfer Agent evidencing the number of Securities set forth opposite such Purchaser’s name on Annex A, registered in the name of such Purchaser (or its nominee in accordance with its delivery instructions), free and clear of any liens or restrictions (other than those arising under state and federal securities laws and bearing the legend set forth in Section 4.1(b), provided that the original of any certificate shall be delivered to such Purchaser as promptly as practicable after the Closing Date but in no event more than three (3) Business Days after the Closing Date); provided that, notwithstanding anything in this Agreement to the contrary and as may be agreed to among the Company and one or more Purchasers, a Purchaser shall not be required to wire its Subscription Amount as set forth on Annex A until it confirms receipt of a book-entry statement from the Company’s transfer agent evidencing the issuance of the Securities to such Purchaser on and as of the Closing Date. If a Purchaser has delivered the Subscription Amount prior to the Closing Date, and the Closing does not occur for any reason on or prior to the fifth (5th) Business Day following the expected Closing Date, the Company shall promptly (but not later than one (1) Business Day thereafter) return the Subscription Amount to such Purchasers by wire transfer of United States dollars in immediately available funds to the account specified by such Purchaser, and any book entries for the Securities shall be deemed cancelled; provided that, unless this Agreement has been terminated pursuant to Section 6.18, such return of funds shall not terminate this Agreement or relieve the Purchasers of their respective obligations to purchase the Securities at the Closing. Notwithstanding anything in this Agreement to the contrary and as may be agreed to among the Company and one or more Purchasers, a Purchaser that is a mutual fund and subject to regulations related to the timing of funding and the issuance of securities thereunder or a Purchaser that has internal policies and/or procedures relating to the timing of funding and issuance of securities thereafter shall not be required to wire its respective portion of the Subscription Amount as set forth on Annex A until it confirms receipt of a book-entry statement from the Company’s transfer agent evidencing the issuance of the Securities to such Purchaser on and as of the Closing Date.

2.3 Closing Deliverables.

(a) On or prior to the Closing, the Company shall issue, deliver or cause to be delivered to each Purchaser the following (the “Company Deliverables”):

(i) evidence of the issuance of the Securities in the names of the Purchasers by book-entry statement from the Transfer Agent (or, if the Purchaser requests that the Securities are to be represented in certificated form, a certificate representing the Securities in the name of such Purchaser as set forth on the Stock Certificate Questionnaire included as Exhibit C hereto (the “Stock Certificate”));

(ii) a legal opinion of Company Counsel, dated as of the Closing Date and in form and substance reasonably satisfactory to the Purchasers, executed by such counsel and addressed to the Purchasers and the Placement Agents;

(iii) the Registration Rights Agreement, duly executed by the Company;

(iv) duly executed Irrevocable Transfer Agent Instructions acknowledged in writing by the Transfer Agent instructing the Transfer Agent to deliver, on an expedited basis, of the issuance of the number of Securities set forth opposite the name of such Purchaser under the heading “Number of Securities Purchased” on Annex A attached hereto, registered in the name of such Purchaser (or its nominee, as directed by the Purchaser);

(v) the Company shall have filed with Nasdaq a Notification Form: Listing of Additional Shares for the listing of the Conversion Shares and shall have received confirmation from Nasdaq that it has completed its review of such form with no objections to the transactions contemplated in the Transaction Documents or the Merger Agreement;

(vi) a certificate of the Secretary of the Company (the “Secretary’s Certificate”), dated as of the Closing Date, (A) certifying the resolutions adopted by the Board of Directors or a duly authorized committee thereof approving the transactions contemplated by this Agreement, the other Transaction Documents and the Merger Agreement and the issuance of the Securities and the Conversion Shares, (B) certifying the current versions of the certificate of incorporation, as amended, and bylaws of the Company and (C) certifying as to the signatures and authority of persons signing the Transaction Documents and related documents on behalf of the Company, in substantially the form attached hereto as Exhibit E;

(vii) the Compliance Certificate referred to in Section 5.1(h);

(viii) a certificate evidencing the formation and good standing of the Company issued by the Secretary of State of the State of Delaware, as of a date within three (3) Business Days of the Closing Date;

(ix) a certificate evidencing the Company’s qualification as a foreign corporation and good standing issued by the Secretary of State (or comparable office) of each jurisdiction in which the Company is qualified to do business as a foreign corporation, as of a date within three (3) Business Days of the Closing Date; and

(x) a certified copy of the Certificate of Designation, as filed with the Secretary of State of the State of Delaware.

(b) On or prior to the Closing, each Purchaser shall deliver or cause to be delivered to the Company the following (the “Purchaser Deliverables”):

(i) this Agreement, duly executed by such Purchaser;

(ii) its Subscription Amount, in United States dollars and in immediately available funds, in the amount set forth in the “Aggregate Purchase Price (Subscription Amount)” column opposite each Purchaser’s name in the table set forth on Annex A by wire transfer to the Company;

(iii) the Registration Rights Agreement, duly executed by such Purchaser; and

(iv) a fully completed and duly executed Stock Certificate Questionnaire in the form attached hereto as Exhibit C, if applicable.

ARTICLE 3

REPRESENTATIONS AND WARRANTIES

3.1 Representations and Warranties of the Company. Except as previously disclosed in the SEC Reports, the Company hereby represents and warrants the following as of the date hereof and the Closing Date (except for the representations and warranties that speak as of a specific date, which shall be made as of such date) to each of the Purchasers and to the Placement Agents:

(a) Due Organization; Subsidiaries. Each of the Company and its Subsidiaries is a corporation or limited liability company duly incorporated or formed, validly existing and in good standing under the Laws of the jurisdiction of its incorporation or organization and has all necessary corporate power and authority: (i) to conduct its business in the manner in which its business is currently being conducted and as proposed to be conducted as described in the SEC Reports, (ii) to own or lease and use its property and assets in the manner in which its property and assets are currently owned or leased and used and (iii) to perform its obligations under all Contracts by which it is bound. All of the Subsidiaries are wholly owned by the Company. Each of the Company and the Subsidiaries is licensed and qualified to do business, and is in good standing (to the extent applicable in such jurisdiction), under the Laws of all jurisdictions where the nature of its business or the manner in which its business is currently being conducted requires such licensing or qualification other than in jurisdictions where the failure to be so qualified individually or in the aggregate would not have or reasonably be expected to have a Material Adverse Effect.

(b) Authorization; Enforcement; Validity. The Company has the requisite corporate power and authority to enter into the Transaction Documents and to perform its obligations under and consummate the transactions contemplated hereby or thereby. All corporate action on the part of the Company, its directors and stockholders necessary for the authorization, execution, sale, issuance and delivery of the Securities and, subject to the Requisite Stockholder Approval, the Conversion Shares contemplated herein has been taken. Each of the Transaction Documents have been (or upon delivery will have been) duly executed and delivered by the Company and is, or when delivered in accordance with the terms hereof or thereof, will constitute the legal, valid and binding obligation of the Company enforceable against the Company in accordance with its respective terms, except (i) as such enforceability may be limited by applicable bankruptcy, examinership, insolvency, reorganization, moratorium, liquidation or similar laws relating to, or affecting generally the enforcement of, creditors’ rights and remedies or by other equitable principles of general application, (ii) as limited by Laws relating to the availability of specific performance, injunctive relief or other equitable remedies and (iii) insofar as indemnification and contribution provisions may be limited by applicable law.

(c) No Conflicts. The execution, delivery and performance by the Company of the Transaction Documents and the issuance, sale and delivery of the securities to be sold by the Company under the Transaction Documents (including, subject to the Company obtaining Requisite Stockholder Approval, the issuance of Conversion Shares upon the conversion of the Securities), the performance by the Company of its obligations under the Transaction Documents and the consummation of the transactions contemplated hereby or thereby (including without limitation, the issuance of the Securities and the reservation for issuance of the Conversion Shares) do not and will not conflict with, result in the breach or violation of, or constitute (with or without the giving of notice or the passage of time or both) a violation of, or default under, (i) any bond, debenture, note or other evidence of indebtedness, or under any lease,

license, franchise, permit, indenture, mortgage, deed of trust, loan agreement, joint venture or other Contract, agreement or instrument to which the Company or any of its Subsidiaries is a party or by which it or its properties may be bound or affected, (ii) the Company’s restated certificate of incorporation, as amended (the “Certificate of Incorporation”), the Company’s bylaws, as amended (the “Bylaws”), or the equivalent document with respect to any of the Company’s Subsidiaries, as amended and as in effect on the date hereof, or (iii) subject to the Requisite Stockholder Approval, any statute or Law, judgment, decree, rule, regulation, ordinance or order of any court or governmental or regulatory body (including Nasdaq), governmental agency, arbitration panel or authority applicable to the Company, any of its subsidiaries or their respective properties, except in the case of clauses (i) and (iii) for such conflicts, breaches, violations or defaults that would not reasonably be expected to have, individually or in the aggregate, a Material Adverse Effect.

(d) Filings, Consents and Approvals. Except for any Current Report on Form 8-K or Notice of Exempt Offering of Securities on Form D to be filed by the Company in connection with the transaction contemplated hereby, any required filing with Nasdaq (other than the Listing of Additional Shares notification form for the listing of the Conversion Shares), the Requisite Stockholder Approval, the filing of the Certificate of Designation and the Registration Statement required to be filed by the Registration Rights Agreement, neither the Company nor any of its Subsidiaries is required to give any notice to, or make any filings with, or obtain any authorization, consent, or approval of any government or governmental agency in order to consummate the transactions contemplated by the Transaction Documents. Assuming the accuracy of the representations of the Purchasers in Section 3.2, no consent, approval, authorization or other order of, or registration, qualification or filing with, any court, regulatory body, administrative agency, self-regulatory organization, stock exchange or market (including Nasdaq), or other governmental body is required for the execution and delivery of the Transaction Documents, the valid issuance, sale and delivery of the Securities to be sold pursuant to the Transaction Documents (including, subject to the Company obtaining the Requisite Stockholder Approval, the issuance of Conversion Shares upon conversion of the Securities) other than such as have been or will be made or obtained, or for any securities filings required to be made under federal or state securities laws applicable to the offering of the Securities or the issuance of Conversion Shares upon conversion of the Securities (other than the Requisite Stockholder Approval and filings that have been made, or will be made, pursuant to the rules and regulations of Nasdaq). The Company and its Subsidiaries are unaware of any facts or circumstances that might prevent the Company from obtaining or effecting any of the registration, application or filings pursuant to this Section 3.1(d).

(e) Issuance of the Securities and Conversion Shares. The issuance of the Securities has been duly authorized, and the Securities, when issued and paid for in accordance with the terms of the Transaction Documents, will be duly and validly issued, fully paid and nonassessable and free and clear of any Encumbrances, preemptive rights or restrictions (other than as provided in the Certificate of Designation or any restrictions on transfer generally imposed under applicable securities laws). The issuance of the Conversion Shares has been duly authorized and the Conversion Shares, subject to receipt of the Requisite Stockholder Approval, when issued in accordance with the terms of the Certificate of Designation, will be duly authorized, validly issued, fully paid and non-assessable, and shall be free and clear of any Encumbrances, preemptive rights or restrictions (other than as provided in this Agreement or any restrictions on transfer generally imposed under applicable securities laws). The Company has reserved such number of shares of Common Stock sufficient to enable full conversion of all of the Securities to the extent allowable prior to receipt of the Requisite Stockholder Approval and, upon receipt of the Requisite Stockholder Approval, the Company shall have reserved such number of shares of Common Stock sufficient to enable the full conversion of all of the Securities.

(f) Capitalization.

(i) As of June 20, 2023 (the “Capitalization Date”), the authorized capital stock of the Company consisted of (i) 10,000,000 shares of convertible preferred stock, par value $0.0001 per share (the “Convertible Preferred Stock”), none of which were issued and outstanding and (ii) 500,000,000 shares of Common Stock, 65,395,159 shares of which were issued and outstanding. The Convertible Preferred Stock and the Common Stock are collectively referred to herein as the “Capital Stock.” All of the issued and shares of Capital Stock have been duly authorized and validly issued and are fully paid and nonassessable and are free of any Encumbrances. As of the Capitalization Date, the Company has reserved (A) (i) 1,667 shares of Common Stock for issuance under the Company’s 2013 Equity Incentive Plan, as amended (the “2013 Plan”), of which 1,667 shares have been reserved for issuance upon exercise or settlement of Company restricted stock units granted and outstanding under the 2013 Plan and no shares remain available for future issuance pursuant to the 2013 Plan, (ii) 499,402 shares of Common Stock for issuance under the Company’s 2015 Equity Incentive Plan, as amended (the “2015 Plan”), of which 499,402 shares have been reserved for issuance upon exercise or settlement of Company options granted and outstanding under the 2015 Plan and no shares remain available for future issuance pursuant to the 2015 Plan, (iii) 13,432,161 shares of Common Stock for issuance under the Company’s 2016 Equity Incentive Plan, as amended (the “2016 Plan”), of which 8,687,838 shares have been reserved for issuance upon exercise or settlement of Company options granted and outstanding under the 2016 Plan and 4,744,323 shares remain available for future issuance pursuant to the 2016 Plan, (iv) 1,100,000 shares of Common Stock for issuance under the Company’s 2018 Equity Inducement Plan, as amended (the “2018 Plan”), of which 306,000 shares have been reserved for issuance upon exercise or settlement of Company options granted and outstanding under the 2018 Plan and 794,000 shares remain available for future issuance pursuant to the 2018 Plan and (v) 667,546 shares of Common Stock for issuance pursuant to the Company’s CEO Inducement Grant (the “2022 Inducement Grant”), of which 667,546 shares have been reserved for issuance upon exercise or settlement of Company options granted and outstanding pursuant to the 2022 Inducement Grant and no shares remain available for future issuance pursuant to the 2022 Inducement Grant, (B) 2,323,888 shares of Common Stock for future issuance pursuant to the Company’s 2016 Employee Stock Purchase Plan (of which 498,554 shares have been issued and are currently outstanding) and (C) 28,869,251 shares of Common Stock for issuance upon the exercise of 28,891,578 pre-funded warrants to acquire shares of Common Stock, all of which remain subject to exercise in exchange for Common Stock. As of the date hereof, the Company has declared a distribution of one contingent value right for each outstanding share of Common Stock as of immediately prior to the closing of the Merger, representing the right to receive contingent payments, payable in cash or Common Stock, upon the occurrence of certain events relating to the sale of the Company’s legacy non-cash assets (the “CVRs”). After giving effect to the Merger and the issuance of the Securities, the Company will have 1,086,341 shares of Series A Preferred Stock authorized, 1,086,341 of which will be issued and outstanding. None of the outstanding shares of the Company were issued in violation of any preemptive rights, rights of first refusal or other similar rights to subscribe for or purchase securities of the Company. Except as otherwise set forth in this Agreement or in the Merger Agreement, as of the date hereof there are no outstanding options, warrants, rights (including conversion or preemptive rights), agreements, arrangements or commitments of any character, whether or not contingent, relating to the issued or unissued Capital Stock of the Company or obligating the Company to issue or sell any share of Capital Stock of, or other equity interest in, the Company. The issuance and sale of the Securities (including, subject to the Company obtaining the Requisite Stockholder Approval, the issuance of Conversion Shares upon conversion of the Securities) will not obligate the Company to issue shares of Common Stock or other securities to any Person (other than the Purchasers) and will not result in a right of any holder of Company securities to adjust the exercise, conversion, exchange or reset price under any of such securities.

(ii) Effective as of the consummation of the Merger, Spyre will be a wholly-owned subsidiary of the Company.

(g) Merger Agreement.

(i) The Merger Agreement has been duly and validly authorized, executed and delivered by the Company, the First Merger Sub and the Second Merger Sub and, assuming due authorization, execution and delivery by the other parties thereto, constitutes a valid and binding agreement of the Company, the First Merger Sub and the Second Merger Sub enforceable against the Company, the First Merger Sub and the Second Merger Sub in accordance with its terms, except as enforceability may be limited by applicable bankruptcy, insolvency or similar laws affecting the enforcement of creditors’ rights generally or by equitable principles relating to enforceability.

(ii) To the Company’s Knowledge, the representations and warranties of Spyre contained in Section 2 of the Merger Agreement (as qualified therein and in the disclosure schedules thereto) were, as of the date of the Merger Agreement, and are, as of the date hereof, true and accurate in all material respects (or, if any such representations or warranties are qualified by materiality, material adverse effect or similar language, true and correct in all respects).

(h) SEC Reports; Disclosure Materials. The Company has filed or furnished, as applicable, on a timely basis all forms, statements, schedules, certifications, reports and other documents required to be filed or furnished by it with the Commission under the Exchange Act or the Securities Act since January 1, 2021 (collectively, and in each case including all exhibits and schedules thereto and documents incorporated by reference therein, the “SEC Reports”). As of the time it was filed with the Commission (or, if amended or superseded by a filing prior to the date of this Agreement, then on the date of such filing), each of the SEC Reports complied in all material respects with the applicable requirements of the Securities Act or the Exchange Act (as the case may be) and as of the time they were filed, none of the SEC Reports contained any untrue statement of a material fact or omitted to state a material fact required to be stated therein or necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading. There are no material outstanding or unresolved comments in comment letters from the staff of the Division of Corporation Finance of the Commission with respect to any of the SEC Reports. The Company meets the requirements for use of Form S-3 under the Securities Act.

(i) Financial Statements. As of their respective filing dates, the financial statements (including any related notes) contained or incorporated by reference in the SEC Reports (i) complied as to form in all material respects with the Securities Act and the Exchange Act, as applicable, and the published rules and regulations of the Commission applicable thereto, (ii) were prepared in accordance with GAAP (except as may be indicated in the notes to such financial statements or, in the case of unaudited financial statements, as permitted by Form 10-Q of the Commission, and except that the unaudited financial statements may not contain footnotes and are subject to normal and recurring year-end adjustments that are not reasonably expected to be material in amount) applied on a consistent basis unless otherwise noted therein throughout the periods indicated and (iii) fairly present, in all material respects, the consolidated financial position of the Company as of the respective dates thereof and the results of operations and cash flows of the Company for the periods covered thereby. Other than as expressly disclosed in the SEC Reports filed at least one (1) Business Day prior to the date hereof, there has been no material change in the Company’s accounting methods or principles that would be required to be disclosed in the Company’s financial statements in accordance with GAAP. Except as set forth in the consolidated financial statements of the Company included in the SEC Reports filed at least one (1) Business Day prior to the date hereof, the Company has not incurred any liabilities, contingent or otherwise, except those incurred in the ordinary course of business, consistent (as to amount and nature) with past practices since the date of such financial statements, none of which, individually or in the aggregate, have had or would reasonably be expected to have a Material Adverse Effect. The books of account and other financial records of the Company and each of its Subsidiaries are true and complete in all material respects.

(j) Independent Accountants. PricewaterhouseCoopers LLP, who have certified certain financial statements of the Company and delivered their report with respect to the audited financial statements included in the SEC Reports, have at all times since the date of enactment of the Sarbanes-Oxley Act been (i) a registered public accounting firm (as defined in Section 2(a)(12) of the Sarbanes-Oxley Act), (ii) to the Company’s Knowledge, “independent” with respect to the Company within the meaning of Regulation S-X under the Exchange Act and (iii) to the Company’s Knowledge, in compliance with subsections (g) through (l) of Section 10A of the Exchange Act and the rules and regulations promulgated by the Commission and the Public Accounting Oversight Board thereunder.

(k) Absence of Certain Changes. Since the date of the Unaudited Interim Balance Sheet, there has been (i) no material adverse change to, and no material adverse development in, the assets, liabilities, business, properties, operations, condition (financial or otherwise), results of operations or prospects of the Company or its Subsidiaries, (ii) no Material Adverse Effect, (iii) no satisfaction or discharge of any material lien, claim or encumbrance or payment of any obligation by the Company, except in the ordinary course of business and (iv) no waiver, not in the ordinary course of business, by the Company or any Subsidiary of a material right or of a material debt owed to it. Since the date of the Unaudited Interim Balance Sheet, neither the Company nor any of its Subsidiaries has (i) purchased any of its outstanding Common Stock (other than from its employees or other service providers in connection with the termination of their service pursuant to the terms of its equity compensation plans or agreements) or declared or paid any dividends or distributions, other than the CVRs, (ii) sold any material assets, individually or in the aggregate, outside of the ordinary course of business, (iii) made any material change or material amendment to, or waiver of any material right, or termination of, any material Contract, (iv) had material transaction entered into or material capital expenditures, individually or in the aggregate, outside of the ordinary course of business or (v) experienced any loss of services of any executive officer (as defined in Rule 405 under the Securities Act), other than as disclosed in the SEC Reports prior to the date hereof. Neither the Company nor any of its Subsidiaries has taken any steps to seek protection pursuant to any bankruptcy law, nor does the Company have any knowledge or reason to believe that its creditors (if any) intend to initiate involuntary bankruptcy proceedings or any actual knowledge of any fact that would reasonably lead any such creditor to do so. The Company and its Subsidiaries, individually and on a consolidated basis, are not as of the date hereof, and after giving effect to the transactions contemplated hereby to occur at the Closing, will not be Insolvent (as defined below). For purposes of this Section 3.1(k), “Insolvent” means, with respect to any Person, (i) the present fair saleable value of such Person’s assets is less than the amount required to pay such Person’s total indebtedness, (ii) such Person is unable to pay its debts and liabilities, subordinated, contingent or otherwise, as such debts and liabilities become absolute and matured, (iii) such Person intends to incur or believes that it will incur debts that would be beyond its ability to pay as such debts mature or (iv) such Person has unreasonably small capital with which to conduct the business in which it is engaged as such business is now conducted and is proposed to be conducted.

(l) Litigation. There is no action, suit, proceeding or investigation pending or, to the Company’s Knowledge, currently threatened in writing against the Company, any of its Subsidiaries or any of their respective directors and officers that questions the validity of the Transaction Documents or the right of the Company to enter into the Transaction Documents or to consummate the transactions contemplated hereby and thereby. There is no action, suit, proceeding or investigation pending or, to the Company’s Knowledge, currently threatened in writing against the Company or any Subsidiary or any of their respective directors and officers which would, if there were an unfavorable decision, have or reasonably be expected to have, either individually or in the aggregate, a Material Adverse Effect.

(m) Employment Matters. No material labor dispute exists or, to the Company’s Knowledge, is imminent with respect to any of the employees of the Company or any of its Subsidiaries which would have or would reasonably be expected to result in a Material Adverse Effect. None of the Company’s or any Subsidiary’s employees is a member of a labor union that relates to such employee’s

relationship with the Company, and neither the Company nor any of its Subsidiaries is a party to a collective bargaining agreement. To the Company’s Knowledge, no executive officer or key employee of the Company or any Subsidiary, is, or is now expected to be, in violation of any material term of any employment Contract, confidentiality, disclosure or proprietary information agreement or non-competition agreement, or any other Contract or agreement or any restrictive covenant in favor of any third party, and to the Company’s Knowledge, the continued employment of each such executive officer or key employee does not subject the Company or any Subsidiary to any liability with respect to any of the foregoing matters, except, in each case, matters that, individually or in the aggregate, would not reasonably be expected to result in a Material Adverse Effect. The Company is in compliance in all material respects with all U.S. federal, state, local and foreign Laws and regulations relating to employment and employment practices, terms and conditions of employment and wages and hours. Any Employee Plans that are “employee pension benefit plans” within the meaning of Section 3(2) of ERISA and which are intended to meet the qualification requirements of Section 401(a) of the Code have received determination or opinion letters from the Internal Revenue Service on which they may currently rely to the effect that such plans are qualified under Section 401(a) of the Code and the related trusts are exempt from federal income taxes under Section 501(a) of the Code, respectively, and nothing has occurred that would reasonably be expected to materially adversely affect the qualification of such Employee Plan or the tax exempt status of the related trust.

(n) Conduct of Business; Regulatory Permits. Neither the Company nor any of its Subsidiaries is in violation of any term of or in default under its Certificate of Incorporation, any Certificate of Designation of any outstanding series of preferred stock of the Company or the Bylaws or their organizational charter or bylaws, respectively. Neither the Company nor any of its Subsidiaries (i) is in default of or in violation of, nor has the Company or any of its Subsidiaries received written notice of a claim that it is in default under or that it is in violation of, any Parent Material Contract (as defined in the Merger Agreement) (whether or not such default or violation has been waived), or (ii) is in violation of any judgment, decree or order or any statute, ordinance, rule or regulation applicable to the Company or its Subsidiaries, and neither the Company nor any of its Subsidiaries will conduct its business in violation of any of the foregoing, except for possible violations which would not, individually or in the aggregate, have or reasonably be expected to have a Material Adverse Effect. Without limiting the generality of the foregoing, the Company is not in violation of any of the rules, regulations or requirements of the Nasdaq and, to the Company’s Knowledge, there exist no facts or circumstances that would reasonably lead to delisting or suspension of the Common Stock by Nasdaq in the foreseeable future. The Company and its Subsidiaries possess all certificates, authorizations and permits issued by the appropriate regulatory authorities necessary to conduct their respective businesses as currently conducted and as proposed to be conducted, except where the failure to possess such certificates, authorizations or permits would not reasonably be expected to have, individually or in the aggregate, a Material Adverse Effect, and neither the Company nor any such Subsidiary has received any written notice of proceedings relating to the revocation or modification of any such certificate, authorization or permit.

(o) Title to Properties and Assets. None of the Company or its Subsidiaries owns, or has ever owned, any real property. The Company’s or is Subsidiary’s possession, occupancy, lease, use and/or operation of each such leased property conforms to all applicable Laws in all material respects, and the Company or its Subsidiary, as applicable, has exclusive possession of each such leased property and leasehold interest and has not granted any occupancy rights to tenants or licensees with respect to such leased property or leasehold interest. In addition, each such leased property and leasehold interest is free and clear of all Encumbrances other than Permitted Encumbrances. The Company and each of its Subsidiaries owns, and has good and marketable title to, or, in the case of leased properties and assets, valid leasehold interests in, all tangible properties or tangible assets and equipment used or held for use in their respective business or operations or purported to be owned by any of them, including: (a) all tangible assets reflected on the Unaudited Interim Balance Sheet and (b) all other tangible assets reflected in the books and records of the Company as being owned by the Company or any of its Subsidiaries. All of such assets are owned or, in the case of leased assets, leased by the Company or any of its Subsidiaries free and clear of any Encumbrances, other than Permitted Encumbrances.

(p) Intellectual Property Rights. The Company and its Subsidiaries own, or have obtained valid and enforceable licenses for, the inventions, patent applications, patents, trademarks, trade names, service names, copyrights, trade secrets and other intellectual property described in the SEC Reports as being owned or licensed by them or which are necessary for the conduct of their respective businesses as currently conducted or as currently proposed to be conducted (collectively, “Intellectual Property”) and the conduct of their respective businesses does not and will not infringe, misappropriate or otherwise conflict in any material respect with any such rights of others. To the Company’s Knowledge, the operation of the business of the Company and its Subsidiaries, as now conducted or as proposed to be conducted in the SEC Reports, together with the Company’s use of the Company’s Intellectual Property, does not conflict with, infringe, misappropriate or otherwise violate the Intellectual Property of any third party. No actions, suits, claims or proceedings have been asserted, or, to the Company’s Knowledge, threatened against the Company or any of its Subsidiaries alleging any of the foregoing or seeking to challenge, deny or restrict the operation of the business of the Company or its Subsidiaries, and the Company is unaware of any facts which would form a reasonable basis for any such claim. None of the Company or any of its Subsidiaries has received any notice of a claim of infringement, misappropriation or conflict with Intellectual Property rights of others, except for such claims that would not, individually or the in aggregate, have or reasonably be expected to have a Material Adverse Effect. The Intellectual Property rights owned by the Company and its Subsidiaries and, to the Company’s Knowledge, any Intellectual Property rights licensed to the Company or its Subsidiaries, have not been adjudged invalid or unenforceable, in whole or in part, and there is no pending or, to the Company’s Knowledge, threatened action, suit, proceeding or claim by others challenging the validity or scope of any such Intellectual Property rights, and the Company is unaware of any facts which would form a reasonable basis for any such challenge, except for such actions, suits, proceedings, or claims that would not, individually or the in aggregate, be reasonably expected to have a Material Adverse Effect. None of the Company or any of its Subsidiaries is a party to or bound by any options, licenses or agreements with respect to the Intellectual Property rights of any other person or entity that are required to be set forth in the SEC Reports. None of the technology or Intellectual Property used by the Company or its Subsidiaries in their respective businesses has been obtained or is being used by the Company in violation of any contractual obligation binding on the Company or any of its Subsidiaries or, to the Company’s Knowledge, any of their respective officers, directors or employees or otherwise in violation of the rights of any persons.

(q) Insurance. Each of the Company and its Subsidiaries are insured by recognized, financially sound and reputable institutions with policies in such amounts and with such deductibles and covering such risks as are generally deemed adequate and customary for their businesses including, but not limited to, policies covering real and personal property owned or leased by the Company and its Subsidiaries against theft, damage, destruction, acts of vandalism and earthquakes and policies covering the Company and its Subsidiaries for product liability claims and clinical trial liability claims. The Company has no reason to believe that it or any of its Subsidiaries will not be able to (i) renew its existing insurance coverage as and when such policies expire or (ii) obtain comparable coverage from similar institutions as may be necessary or appropriate to conduct its business as now conducted and at a cost that could not reasonably be expected to result in a Material Adverse Effect. Neither the Company nor any of its Subsidiaries has been denied any insurance coverage which it has sought or for which it has applied.

(r) Transactions with Affiliates and Employees. Since the date of the Company’s Definitive Proxy Statement on Schedule 14A filed with the Commission on April 17, 2023, no event has occurred that would be required to be reported by the Company pursuant to Item 404 of Regulation S-K promulgated by the SEC.

(s) Company’s Accounting System. The Company and each of its Subsidiaries makes and keeps accurate books and records and maintains a system of internal control over financial reporting (as defined in Rules 13a-15 and 15d-15 under the Exchange Act) sufficient to provide reasonable assurance that: (i) transactions are executed in accordance with management’s general or specific authorization; (ii) transactions are recorded as necessary to permit preparation of financial statements in conformity with generally accepted accounting principles as applied in the United States and to maintain accountability for assets; (iii) access to assets is permitted only in accordance with management’s general or specific authorization; (iv) the recorded accountability for assets is compared with existing assets at reasonable intervals and appropriate action is taken with respect to any differences; and (v) the interactive data in eXtensible Business Reporting Language included or incorporated by reference in the SEC Reports fairly presents the information called for in all material respects and is prepared in accordance with the Commission’s rules and guidelines applicable thereto, except as would not, individually or the in aggregate, be reasonably expected to have a Material Adverse Effect. Since January 1, 2021, (i) neither the Company nor any Subsidiary nor, to the Company’s Knowledge, any director, officer, employee, auditor, accountant or representative of the Company or any Subsidiary has received or otherwise had or obtained knowledge of any material complaint, allegation, assertion or claim, whether written or oral, regarding the accounting or auditing practices, procedures, methodologies or methods of the Company or any Subsidiary or their respective internal accounting controls, including any material complaint, allegation, assertion or claim that the Company or any Subsidiary has engaged in questionable accounting or auditing practices.

(t) Sarbanes-Oxley; Disclosure Controls. The Company is in compliance in all material respects with the applicable provisions of the Sarbanes-Oxley Act of 2002 and the rules and regulations promulgated thereunder. The Company maintains a system of internal accounting controls designed to ensure that (a) material information relating to the Company and its Subsidiaries, is made known to the Company’s principal executive officer and its principal financial officer by others within those entities and (b) that information required to be disclosed by the Company in reports that it file, furnishes or submits under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the Commission’s rules and forms, including controls and procedures designed to ensure that such information is accumulated and communicated to the Company’s management as appropriate to allow timely decisions regarding required disclosure. The Company has established and maintains disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the Company and designed such disclosure controls and procedures to ensure that material information relating to the Company is made known to the certifying officers by others within those entities, particularly during the period in which the Company’s most recently filed periodic report under the Exchange Act, as the case may be, is being prepared. The Company has established internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with GAAP. The Company’s certifying officers have evaluated the effectiveness of the Company’s disclosure controls and procedures and the Company’s internal control over financial reporting (collectively, “internal controls”) as of the end of the period covered by the most recently filed periodic report under the Exchange Act (such date, the “Evaluation Date”). The Company presented in its most recently filed periodic report under the Exchange Act the conclusions of the certifying officers about the effectiveness of such internal controls based on their evaluations as of the Evaluation Date. Since the Evaluation Date, there have been no significant changes in the Company’s internal controls or, to the Company’s Knowledge, in other factors that could materially affect the Company’s internal controls and there have been no material weaknesses in the Company’s internal control over financial reporting (whether or not remediated). The Company maintains and will continue to maintain a standard system of accounting established and administered in accordance with GAAP and the applicable requirements of the Exchange Act.

(u) [Reserved].

(v) Certain Fees. No person or entity will have, as a result of the transactions contemplated by this Agreement, any valid right, interest or claim against or upon the Company or a Purchaser for any commission, fee or other compensation pursuant to any agreement, arrangement or understanding entered into by or on behalf of the Company, other than the Placement Agents with respect to the offer and sale of the Securities (which placement agent fees are being paid by the Company or Spyre, as the case may be). The Purchasers shall have no obligation with respect to any fees or with respect to any claims made by or on behalf of other Persons for fees of a type contemplated in this Section 3.1(v) that may be due in connection with the transactions contemplated by the Transaction Documents. The Company shall indemnify, pay, and hold each Purchaser harmless against, any liability, loss or expense (including, without limitation, attorneys’ fees and out-of-pocket expenses) arising in connection with any such right, interest or claim.

(w) Private Placement. Assuming the accuracy of the Purchasers’ representations and warranties set forth in Section 3.2 of this Agreement, no registration under the Securities Act is required for the offer and sale of the Securities by the Company to the Purchasers under the Transaction Documents (including, subject to the Company obtaining Requisite Stockholder Approval, the issuance of Conversion Shares upon the conversion of the Securities). The issuance and sale of the Securities hereunder (including, subject to the Company obtaining Requisite Stockholder Approval, the issuance of Conversion Shares upon the conversion of the Securities) does not contravene the rules and regulations of the Trading Market.

(x) Company Not an “Investment Company.” The Company is not, and will not be, immediately after receipt of payment for the Securities, required to register as an “investment company” under the Investment Company Act of 1940, as amended.

(y) Registration Rights. Other than each of the Purchasers, no Person has any right to cause the Company to effect the registration under the Securities Act of the offer and sale of any securities of the Company other than those offers and sales which are currently registered on an effective registration statement on file with the Commission.

(z) Listing and Maintenance Requirements. The Company’s Common Stock is registered pursuant to Section 12(b) or Section 12(g) of the Exchange Act, and the Company has taken no action designed to terminate the registration of the Common Stock under the Exchange Act, nor has the Company received any notification that the Commission or the Principal Trading Market is contemplating terminating such registration or listing. The Company is, and immediately following the Closing will be, in compliance with all applicable listing requirements of the Principal Trading Market. The Company has filed with Nasdaq an additional shares listing application covering Conversion Shares and has not received any objections from Nasdaq with respect to such application with respect to the transactions contemplated hereby or by the Merger Agreement.

(aa) Disclosure. The Company confirms that it has not provided, and to the Company’s Knowledge, none of its officers or directors nor any other Person acting on its or their behalf (including, without limitation, the Placement Agents) has provided, and it has not authorized the Placement Agents to provide, any Purchaser or its respective agents or counsel with any information that it believes constitutes material, non-public information except insofar as the existence, provisions and terms of the Transaction Documents, the Merger Agreement, and the proposed transactions hereunder and thereunder may constitute such information, all of which will be disclosed by the Company in the Press Release as contemplated by Section 4.4 hereof. The Company understands and confirms that the Purchasers will rely on the foregoing representations in effecting transactions in securities of the Company.

(bb) No Integrated Offering. Assuming the accuracy of the Purchasers’ representations and warranties set forth in Section 3.2, and except with respect to the capital stock to be issued pursuant to the Merger Agreement, none of the Company, its Subsidiaries nor, to the Company’s Knowledge, any of its Affiliates or any Person acting on its behalf has, directly or indirectly, at any time within the past six (6) months, made any offers or sales of any Company security or solicited any offers to buy any security under circumstances that would (i) eliminate the availability of the exemption from registration under the Securities Act, including Regulation D, in connection with the offer and sale by the Company of the Securities as contemplated hereby or (ii) cause the offering of the Securities pursuant to the Transaction Documents to be integrated with prior offerings by the Company for purposes of any applicable law, regulation or stockholder approval provisions, including, without limitation, under the rules and regulations of any Trading Market on which any of the securities of the Company are listed or designated.

(cc) Tax Matters. The Company and each of its Subsidiaries has timely filed all income tax returns and all other material tax returns that were required to be filed by or with respect to it under applicable Law. All such tax returns were correct and complete in all material respects and have been prepared in material compliance with all applicable Law. Subject to exceptions as would not be material, no claim has ever been made by a Governmental Authority in a jurisdiction where the Company or any of its Subsidiaries does not file tax returns that the Company or any of its Subsidiaries is subject to taxation by that jurisdiction. All material amounts of taxes due and owing by the Company and each of its Subsidiaries (whether or not shown on any tax return) have been timely paid. The unpaid taxes of the Company and each of its Subsidiaries for periods (or portions thereof) ending on or prior to the date of the Unaudited Interim Balance Sheet do not materially exceed the accruals for current taxes set forth on the Unaudited Interim Balance Sheet. Since the date of the Unaudited Interim Balance Sheet, neither the Company nor any of its Subsidiaries has incurred any material liability for taxes outside the ordinary course of business or otherwise inconsistent with past custom and practice. The Company is classified as a Subchapter C corporation for U.S. federal tax purposes.

(dd) Compliance with Environmental Laws. Since January 1, 2021, the Company and each of its Subsidiaries has complied with all applicable federal, state, local or foreign Law relating to pollution or protection of human health or the environment (including ambient air, surface water, ground water, land surface or subsurface strata), including any law or regulation relating to emissions, discharges, releases or threatened releases of Hazardous Materials, or otherwise relating to the manufacture, processing, distribution, use, treatment, storage, disposal, transport or handling of Hazardous Materials (“Environmental Laws”), which compliance includes the possession by the Company of all permits and other governmental authorizations required under applicable Environmental Laws and compliance with the terms and conditions thereof, except for any failure to be in compliance that, individually or in the aggregate, would not result in or reasonably be expected to result in a Material Adverse Effect. Neither the Company nor any of its Subsidiaries has received since January 1, 2021, any written notice or other communication (in writing or otherwise), whether from a Governmental Authority, citizens group, employee or otherwise, that alleges that the Company or any of its Subsidiaries is not in compliance with any Environmental Law, and, to the Company’s Knowledge, there are no circumstances that may prevent or interfere with the Company’s or any of its Subsidiaries’ compliance with any Environmental Law in the future, except where such failure to comply would not reasonably be expected to have a Material Adverse Effect. To the Company’s Knowledge: (i) no current or prior owner of any property leased or controlled by the Company or any of its Subsidiaries has received, since January 1, 2021, any written notice or other communication relating to property owned or leased at any time by the Company or any of its Subsidiaries, whether from a Governmental Authority, citizens group, employee or otherwise, that alleges that such current or prior owner or the Company or any of its Subsidiaries is not in compliance with or violated any Environmental Law relating to such property and (ii) neither the Company nor any of its Subsidiaries has any material liability under any Environmental Law.

(ee) No General Solicitation. Neither the Company nor, to the Company’s Knowledge, any person acting on behalf of the Company has, directly or indirectly, offered or sold any of the Securities or Conversion Shares, or solicited any offers to buy any Securities or Conversion Shares, under any circumstances that would require registration under the Securities Act of the Securities or the Conversion Shares, including by any form of general solicitation or general advertising.

(ff) Anti-Corruption and Anti-Bribery Laws. Neither the Company nor any of its Subsidiaries nor any director, officer, or employee of the Company or any of its Subsidiaries, nor to the Company’s Knowledge, any agent, Affiliate or other person acting on behalf of the Company or any of its subsidiaries has, in the course of its actions for, or on behalf of, the Company or any of its subsidiaries (i) used any corporate funds for any unlawful contribution, gift, entertainment or other unlawful expenses relating to political activity; (ii) made or taken any act in furtherance of an offer, promise, or authorization of any direct or indirect unlawful payment or benefit to any non-U.S. or domestic government official or employee, including of any government-owned or controlled entity or public international organization, or any political party, party official, or candidate for political office; (iii) violated or is in violation of any provision of the U.S. Foreign Corrupt Practices Act of 1977, as amended (the “FCPA”), the UK Bribery Act 2010, or any other applicable anti-bribery or anti-corruption Law; or (iv) made, offered, authorized, requested, or taken an act in furtherance of any unlawful bribe, rebate, payoff, influence payment, kickback or other unlawful payment or benefit. The Company and its Subsidiaries and, to the Company’s Knowledge, the Company’s Affiliates have conducted their respective businesses in compliance with the FCPA and have instituted and maintain policies and procedures designed to ensure, and which are reasonably expected to continue to ensure, continued compliance therewith.

(gg) Money Laundering Laws. The operations of the Company and its Subsidiaries are and have been conducted at all times in compliance with applicable financial recordkeeping and reporting requirements of the USA Patriot Act, the Bank Secrecy Act of 1970, as amended, the money laundering statutes of all jurisdictions, the rules and regulations thereunder and any related or similar rules, regulations or guidelines, issued, administered or enforced by any governmental agency (collectively, the “Money Laundering Laws”); and no action, suit or proceeding by or before any court or governmental agency, authority or body or any arbitrator or non-governmental authority involving the Company or its Subsidiaries with respect to the Money Laundering Laws is pending or, to the Company’s Knowledge, threatened.

(hh) OFAC. Neither the Company nor its Subsidiaries nor any of their respective Affiliates, directors, officers, nor to the Company’s Knowledge, any agent or employee of the Company or its Subsidiaries is subject to any sanctions administered or enforced by the Office of Foreign Assets Control (“OFAC”) of the United States Treasury Department, the U.S. Department of State, the United Nations Security Council, the European Union, His Majesty’s Treasury or any other relevant sanctions authority; and the Company will not directly or indirectly use the proceeds of the offering of the securities contemplated hereby, or lend, contribute or otherwise make available such proceeds to any subsidiary, joint venture partner or other person or entity for the purpose of financing the activities of any person that is the target of sanctions administered or enforced by such authorities or in connection with any country or territory that is the target of country- or territory-wide OFAC sanctions (currently, Iran, Syria, Cuba, North Korea, the Crimea, so-called Donetsk People’s Republic, and so-called Luhansk People’s Republic regions of Ukraine).

(ii) Off Balance Sheet Arrangements. There is no transaction, arrangement, or other relationship between the Company (or any Subsidiary) and an unconsolidated or other off balance sheet entity that is required to be disclosed by the Company in SEC Reports and is not so disclosed and would have or reasonably be expected to result in a Material Adverse Effect.

(jj) Acknowledgment Regarding Purchaser’s Purchase of Securities. The Company acknowledges and agrees that each Purchaser is acting solely in the capacity of an arm’s length purchaser with respect to this Agreement and the other Transaction Documents and the transactions contemplated hereby and thereby, and that the obligations of each Purchaser under this Agreement and the other Transaction Documents are several and not joint. The Company further acknowledges that no Purchaser is acting as a financial advisor or fiduciary of the Company or any of its Subsidiaries (or in any similar capacity) with respect to this Agreement and the other Transaction Documents and the transactions contemplated hereby and thereby, and any advice given by a Purchaser or any of its representatives or agents in connection with this Agreement and the other Transaction Documents and the transactions contemplated hereby and thereby is merely incidental to such Purchaser’s purchase of the Securities. The Company further represents to each Purchaser that the Company’s decision to enter into the Transaction Documents has been based solely on the independent evaluation by the Company and its representatives.

(kk) No Price Stabilization or Manipulation; Compliance with Regulation M. Neither the Company nor any of its Subsidiaries has taken, directly or indirectly, any action designed to or that might cause or result in stabilization or manipulation of the price of any security of the Company to facilitate the sale or resale of the Securities or Conversion Shares or otherwise, and has taken no action which would directly or indirectly violate Regulation M under the Exchange Act.

(ll) Clinical Data and Regulatory Compliance. The preclinical tests and clinical trials, and other studies (collectively, “studies”) that are described in, or the results of which are referred to in, the SEC Reports were and, if still pending, are being conducted in all material respects in accordance with the protocols, procedures and controls designed and approved for such studies and with standard medical and scientific research procedures. Each description of the results of such studies is accurate and complete in all material respects and fairly presents the data derived from such studies, and the Company and its Subsidiaries have no knowledge of any other studies the results of which are inconsistent with, or otherwise call into question, the results described or referred to in the SEC Reports. The Company and its Subsidiaries have made all such filings and obtained all such approvals as may be required by the Food and Drug Administration of the U.S. Department of Health and Human Services or any committee thereof or from any other U.S. or non-U.S. government or drug or medical device regulatory agency, or health care facility Institutional Review Board (collectively, the “Regulatory Agencies”). Neither the Company nor any of its Subsidiaries has received any notice of, or correspondence from, any Regulatory Agency requiring the termination, suspension or modification of any clinical trials that are described or referred to in the SEC Reports. The Company and its Subsidiaries have each operated and currently are in compliance in all material respects with all applicable rules, regulations and policies of the Regulatory Agencies.

(mm) No Additional Agreements. The Company does not have any agreement or understanding (including side letters) with any Purchaser with respect to the transactions contemplated by the Transaction Documents other than as specified in the Transaction Documents.

(nn) No Disqualification Events. No “bad actor” disqualifying event described in Rule 506(d)(1)(i)-(viii) of the Securities Act (a “Disqualification Event”) is applicable to the Company or, to the Company’s Knowledge, any Company Covered Person (as defined below), except for a Disqualification Event as to which Rule 506(d)(2)(ii)-(iv) or (d)(3), is applicable. “Company Covered Person” means, with respect to the Company as an “issuer” for purposes of Rule 506 promulgated under the Securities Act, any person listed in the first paragraph of Rule 506(d)(1). Other than the Placement Agents, the Company is not aware of any Person (other than any Company Covered Person) that has been or will be paid (directly or indirectly) remuneration for solicitation of purchasers in connection with the sale of the Securities or the Conversion Shares pursuant to this Agreement. The Company has complied, to the extent applicable, with its disclosure obligations under Rule 506(e), and has furnished to the Placement Agents a copy of any disclosures provided thereunder.

(oo) Shell Company Status. The Company is not, and has never been, an issuer identified in Rule 144(i)(1).

(pp) Security. Except as would not reasonably be expected to have a Material Adverse Effect, the Company and its Subsidiaries’ information technology assets and equipment, computers, systems, networks, hardware, software, websites, applications, and databases (collectively, “IT Systems”) are adequate for, and operate and perform in all respects as required in connection with the operation of the business of the Company and its Subsidiaries as currently conducted, and are free and clear of all material Trojan horses, time bombs, malware and other malicious code. The Company and its Subsidiaries have implemented and maintained commercially reasonable physical, technical and administrative controls designed to maintain and protect the confidentiality, integrity, availability, privacy and security of all sensitive, confidential or regulated data (“Confidential Data”) used or maintained in connection with their businesses and Personal Data, and the integrity, availability continuous operation, redundancy and security of all IT Systems. “Personal Data” means the following data used in connection with the Company’s and its Subsidiaries’ businesses and in their possession or control: (i) a natural person’s name, street address, telephone number, e-mail address, photograph, social security number or other tax identification number, driver’s license number, passport number, credit card number, bank information, or customer or account number; (ii) information that identifies, relates to, or may reasonably be used to identify an individual; (iii) any information regarding an individual’s medical history, mental or physical condition, or medical treatment or diagnosis by a health care professional; (iv) an individual’s health insurance policy number or subscriber identification number, any unique identifier used by a health insurer to identify the individual, or any information in an individual’s application and claims history; (v) any information which would qualify as “protected health information” under the Health Insurance Portability and Accountability Act of 1996, as amended by the Health Information Technology for Economic and Clinical Health Act (collectively, “HIPAA”); (vi) any information which would qualify as “personal data,” “personal information” (or similar term) under the Privacy Laws; and (vii) any other piece of information that alone, or combined with other information, allows the identification of such natural person, or his or her family, or permits the collection or analysis of any data related to an identified person’s health or sexual orientation. To the Company’s Knowledge, there have been no breaches, outages or unauthorized uses of or accesses to the IT Systems, Confidential Data, and Personal Data. The Company and its Subsidiaries are presently, and at all prior times were, in material compliance with all applicable laws or statutes and all judgments and orders binding on the Company, applicable binding rules and regulations of any court or arbitrator or governmental or regulatory authority, and their internal policies and contractual obligations, each relating to the Processing, privacy and security of Personal Data and Confidential Data, the privacy and security of IT Systems and the protection of such IT Systems, Confidential Data, and Personal Data from unauthorized use, access, misappropriation or modification.

(qq) Compliance with Data Privacy Laws. The Company and its Subsidiaries are, and at all prior times were, in material compliance with all applicable state and federal data privacy and security laws and regulations regarding the collection, use, storage, retention, disclosure, transfer, disposal, or any other processing (collectively “Process” or “Processing”) of Personal Data, including HIPAA, the California Consumer Privacy Act, and the European Union General Data Protection Regulation (EU 2016/679) (collectively, the “Privacy Laws”). To ensure compliance with the Privacy Laws, the Company and its subsidiaries have in place, comply with, and take all appropriate steps necessary to ensure compliance in all material respects with their policies and procedures relating to data privacy and security, and the Processing of Personal Data and Confidential Data (the “Privacy Statements”). The Company and its Subsidiaries have, except as would not reasonably be expected, individually or in the aggregate, to have a Material Adverse Effect, at all times since January 1, 2021 provided accurate notice of its Privacy Statements then in effect to its clients, employees, third party vendors and representatives. None of such disclosures made or contained in any Privacy Statements have been materially inaccurate, misleading, incomplete, or in material violation of any Privacy Laws. The Company further certifies that neither it nor

any of its Subsidiaries: (i) has received notice of any actual or potential claim, complaint, proceeding, regulatory proceeding or liability under or relating to, or actual or potential violation of, any of the Privacy Laws, contracts related to the Processing of Personal Data or Confidential Data, or Privacy Statements, and has no knowledge of any event or condition that would reasonably be expected to result in any such notice; (ii) is currently conducting or paying for, in whole or in part, any investigation, remediation, or other corrective action pursuant to any Privacy Law or contract; or (iii) is a party to any order, decree, or agreement that imposes any obligation or liability under any Privacy Law.

3.2 Representations and Warranties of the Purchasers. Each Purchaser hereby, for itself and for no other Purchaser, represents and warrants to the Company as follows:

(a) Organization; Authority. Such Purchaser is an entity duly organized, validly existing and in good standing under the Laws of the jurisdiction of its organization with the requisite corporate or, if such Purchaser is not a corporation, such partnership, limited liability company or other applicable power and authority to enter into and to consummate the transactions contemplated by the applicable Transaction Documents and otherwise to carry out its obligations hereunder and thereunder. The execution and delivery of this Agreement by such Purchaser and performance by such Purchaser of the transactions contemplated by this Agreement have been duly authorized by all necessary corporate or, if such Purchaser is not a corporation, such partnership, limited liability company or other applicable like action, on the part of such Purchaser. Each Transaction Document to which it is a party has been duly executed by such Purchaser, and when delivered by such Purchaser in accordance with the terms hereof, will constitute the valid and legally binding obligation of such Purchaser, enforceable against it in accordance with its terms, except as such enforceability may be limited by applicable bankruptcy, examinership, insolvency, reorganization, moratorium, liquidation or similar laws relating to, or affecting generally the enforcement of, creditors’ rights and remedies or by other equitable principles of general application.

(b) No Conflicts. The execution, delivery and performance by such Purchaser of this Agreement and the Registration Rights Agreement and the consummation by such Purchaser of the transactions contemplated hereby and thereby will not (i) result in a violation of the organizational documents of such Purchaser, (ii) conflict with, or constitute a default (or an event which with notice or lapse of time or both would become a default) under, or give to others any rights of termination, amendment, acceleration or cancellation of, any agreement, indenture or instrument to which such Purchaser is a party, or (iii) result in a violation of any Law, rule, regulation, order, judgment or decree (including U.S. federal and state securities laws) applicable to such Purchaser, except in the case of clauses (ii) and (iii) above, for such conflicts, defaults, rights or violations which would not, individually or in the aggregate, reasonably be expected to have a material adverse effect on the ability of such Purchaser to perform its obligations hereunder.

(c) Investment Intent. Such Purchaser understands that the Securities are (and the Conversion Shares will be) “restricted securities” and the offer and sale thereof have not been registered under the Securities Act or any applicable U.S. state securities law and is acquiring the Securities as principal for its own account and not with a view to, or for distributing or reselling such Securities (or the Conversion Shares) or any part thereof in violation of the Securities Act or any applicable U.S. state or other securities laws, provided, however, that by making the representations herein, such Purchaser does not agree to hold any of the Securities or Conversion Shares for any minimum period of time and reserves the right, subject to the provisions of this Agreement and the Registration Rights Agreement, at all times to sell or otherwise dispose of all or any part of such Securities or Conversion Shares pursuant to an effective registration statement under the Securities Act or under an exemption from such registration and in compliance with applicable U.S. federal, state and other securities laws. Such Purchaser is acquiring the Securities hereunder in the ordinary course of its business.

Such Purchaser does not presently have any agreement, plan or understanding, directly or indirectly, with any Person to distribute or effect any distribution of any of the Securities (or any securities which are derivatives thereof) to or through any person or entity in violation of federal securities law; such Purchaser is not a registered broker-dealer under Section 15 of the Exchange Act or an entity engaged in a business that would require it to be so registered as a broker-dealer.

(d) Purchaser Status. At the time such Purchaser was offered the Securities, it was, and at the date hereof it is, an “accredited investor” as defined in Rule 501(a) under the Securities Act.

(e) General Solicitation. Such Purchaser is not purchasing the Securities as a result of any advertisement, article, notice or other communication regarding the Securities published in any newspaper, magazine or similar media or broadcast over television or radio or presented at any seminar or any other general advertisement. The purchase of the Securities by such Purchaser has not been solicited by or through anyone other than the Company or, on the Company’s behalf, the Placement Agents.

(f) Experience of Such Purchaser. Such Purchaser, either alone or together with its representatives, has such knowledge, sophistication and experience in business and financial matters so as to be capable of evaluating the merits and risks of the prospective investment in the Securities, and has so evaluated the merits and risks of such investment. Such Purchaser is able to bear the economic risk of an investment in the Securities.

(g) Access to Information. Such Purchaser acknowledges that it has had the opportunity to review the SEC Reports and has been afforded (i) the opportunity to ask such questions as it has deemed necessary of, and to receive answers from, representatives of the Company concerning the terms and conditions of the offering of the Securities and the merits and risks of investing in the Securities; (ii) access to information about the Company and the Subsidiaries and their respective financial condition, results of operations, business, properties, management and prospects sufficient to enable it to evaluate its investment; and (iii) the opportunity to obtain such additional information that the Company possesses or can acquire without unreasonable effort or expense that is necessary to make an informed investment decision with respect to the investment. Neither such inquiries nor any other investigation conducted by or on behalf of such Purchaser or its representatives or counsel shall modify, amend or affect such Purchaser’s right to rely on the truth, accuracy and completeness of the SEC Reports and the Company’s representations and warranties contained in the Transaction Documents. Such Purchaser has sought such accounting, legal and tax advice as it has considered necessary to make an informed decision with respect to its acquisition of the Securities.

(h) Certain Trading Activities. Other than with respect to the transactions contemplated herein, since the time that such Purchaser was first contacted by the Company, the Placement Agents or any other Person regarding the transactions contemplated hereby, the Purchaser has not, directly or indirectly, effected or agreed to effect any Short Sales. Notwithstanding the foregoing, (i) in the case of a Purchaser that is a multi-managed investment vehicle whereby separate portfolio managers manage separate portions of such Purchaser’s assets, the foregoing representation shall only apply with respect to the portion of assets managed by the portfolio manager that made the investment decision to purchase the Securities covered by this Agreement and (ii) and in the case of a Purchaser whose investment adviser utilized an information barrier with respect to the information regarding the transactions contemplated hereunder after first being contacted by the Company or such other Person representing the Company, the representation set forth above shall only apply after the point in time when the portfolio manager who manages such Purchaser’s assets was informed of the information regarding the transactions contemplated hereunder and, with respect to the Purchaser’s investment adviser, the representation set forth above shall only apply with respect to any purchases or sales, including Short Sales, of the securities of the Company on behalf of other funds or investment vehicles for which the Purchaser’s investment adviser is also an

investment adviser or sub-adviser after the point in time when the portfolio manager who manages the assets of such other funds or investment vehicles for which the Purchaser’s investment adviser is also an investment adviser or sub-adviser was informed of the information regarding the transactions contemplated hereunder. Other than to other Persons party to this Agreement and to the Purchaser’s representatives or agents, including, but not limited to, the Purchaser’s legal, tax and investment advisors, such Purchaser has maintained the confidentiality of all disclosures made to it in connection with this transaction (including the existence and terms of this transaction). Notwithstanding the foregoing, for avoidance of doubt, nothing contained herein shall constitute a representation or warranty, or preclude any actions, with respect to the identification of the availability of, or securing of, available shares to borrow in order to effect Short Sales or similar transactions in the future.

(i) Brokers and Finders. No Person will have, as a result of the transactions contemplated by this Agreement, any valid right, interest or claim against or upon the Purchaser for any commission, fee or other compensation pursuant to any agreement, arrangement or understanding entered into by or on behalf of the Purchaser. No Purchaser shall have any obligation with respect to any fees, or with respect to any claims made by or on behalf of other Persons for fees, in each case of the type contemplated by this Section 3.2(i) that may be due in connection with the transactions contemplated by this Agreement or the Transaction Documents.

(j) Independent Investment Decision. Such Purchaser has independently evaluated the merits of its decision to purchase Securities pursuant to the Transaction Documents, and such Purchaser confirms that it has not relied on the advice of any other Purchaser’s business and/or legal counsel in making such decision. Such Purchaser understands that nothing in this Agreement or any other materials presented by or on behalf of the Company to the Purchaser in connection with the purchase of the Securities constitutes legal, tax or investment advice. Such Purchaser has consulted such legal, tax and investment advisors as it, in its sole discretion, has deemed necessary or appropriate in connection with its purchase of the Securities. Such Purchaser understands that the Placement Agents have acted solely as the agent of the Company in this placement of the Securities and such Purchaser has not relied on the business or legal advice of the Placement Agents or any of their agents, counsel or Affiliates in making its investment decision hereunder, and confirms that none of such Persons has made any representations or warranties to such Purchaser in connection with the transactions contemplated by the Transaction Documents.

(k) Reliance on Exemptions. Such Purchaser understands that the Securities are being offered and sold to it in reliance on specific exemptions from the registration requirements of United States federal and state securities laws and that the Company is relying in part upon the truth and accuracy of, and such Purchaser’s compliance with, the representations, warranties, agreements, acknowledgements and understandings of such Purchaser set forth herein in order to determine the availability of such exemptions and the eligibility of such Purchaser to acquire the Securities.

(l) No Governmental Review. Such Purchaser understands that no United States federal or state agency or any other government or governmental agency has passed on or made any recommendation or endorsement of the Securities or the fairness or suitability of the investment in the Securities nor have such authorities passed upon or endorsed the merits of the offering of the Securities.

(m) Regulation M. Such Purchaser is aware that the anti-manipulation rules of Regulation M under the Exchange Act may apply to sales of Securities and other activities with respect to the Securities by the Purchasers.

(n) Beneficial Ownership. The purchase by such Purchaser of the Securities issuable to it at the Closing will not result in such Purchaser (individually or together with any other Person with whom such Purchaser has identified, or will have identified, itself as part of a “group” in a public filing

made with the Commission involving the Company’s securities) acquiring, or obtaining the right to acquire, beneficial ownership in excess of 19.999% of the outstanding shares of Common Stock or the voting power of the Company on a post transaction basis that assumes that such Closing shall have occurred. Such Purchaser does not presently intend to, alone or together with others, make a public filing with the Commission to disclose that it has (or that it together with such other Persons have) acquired, or obtained the right to acquire, as a result of such Closing when added to any other securities of the Company that it or they then own or have the right to acquire), beneficial ownership in excess of 19.999% of the outstanding shares of Common Stock or the voting power of the Company on a post transaction basis that assumes that each Closing shall have occurred.

(o) Residency. Such Purchaser’s residence (if an individual) or offices in which its investment decision with respect to the Securities was made (if an entity) are located at the address set forth under such Purchaser’s name on Annex A hereto or as otherwise specified below its address on Annex A hereto.

The Company and each of the Purchasers acknowledge and agree that no party to this Agreement has made or makes any representations or warranties with respect to the transactions contemplated hereby other than those specifically set forth in this Article 3 and the Transaction Documents.

ARTICLE 4

OTHER AGREEMENTS OF THE PARTIES

4.1 Transfer Restrictions.

(a) Compliance with Laws. Notwithstanding any other provision of this Article 4, each Purchaser covenants that the Securities and Conversion Shares may be disposed of only pursuant to an effective registration statement under, and in compliance with the requirements of, the Securities Act, or pursuant to an available exemption from, or in a transaction not subject to, the registration requirements of the Securities Act, and in compliance with any applicable U.S. state and federal securities laws. In connection with any transfer of the Securities other than (i) pursuant to an effective registration statement, (ii) to the Company, (iii) pursuant to Rule 144 (provided that the Purchaser provides the Company with reasonable assurances (in the form of seller and, if applicable, broker representation letters) that the securities may be sold pursuant to such rule), or (iv) in connection with a bona fide pledge as contemplated in Section 4.1(b), the Company may require the transferor thereof to provide to the Company an opinion of counsel selected by the transferor and reasonably acceptable to the Company, the form and substance of which opinion shall be reasonably satisfactory to the Company, to the effect that such transfer does not require registration of such transferred Securities or Conversion Shares under the Securities Act and, as a condition of transfer, any such transferee shall agree in writing to be bound by the terms of this Agreement and the Registration Rights Agreement and shall have the rights of a Purchaser under this Agreement and the Registration Rights Agreement with respect to such transferred Securities or Conversion Shares.

(b) Legends. Certificates and book-entry statements evidencing the Securities and any Conversion Shares shall bear any legend as required by the “blue sky” Laws of any state and a restrictive legend in substantially the following form:

PLEDGED, HYPOTHECATED, TRANSFERRED OR ASSIGNED IN THE ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT FOR THE SECURITIES UNDER APPLICABLE SECURITIES LAWS, OR UNLESS OFFERED, SOLD, PLEDGED, HYPOTHECATED OR TRANSFERRED PURSUANT TO AN AVAILABLE EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THOSE LAWS. THE COMPANY AND ITS TRANSFER AGENT SHALL BE ENTITLED TO REQUIRE AN OPINION OF COUNSEL SATISFACTORY TO THE COMPANY AND THE TRANSFER AGENT THAT SUCH REGISTRATION IS NOT REQUIRED. NOTWITHSTANDING THE FOREGOING, THE SECURITIES MAY BE PLEDGED IN CONNECTION WITH A BONA FIDE MARGIN ACCOUNT OR OTHER LOAN OR FINANCING ARRANGEMENT SECURED BY THE SECURITIES.

The Company acknowledges and agrees that a Purchaser may from time to time pledge, and/or grant a security interest in, some or all of the legended Securities or Conversion Shares in connection with applicable securities laws, pursuant to a bona fide margin agreement in compliance with a bona fide margin loan. Such a pledge would not be subject to approval or consent of the Company and no legal opinion of legal counsel to the pledgee, secured party or pledgor shall be required in connection with the pledge, but such legal opinion shall be required in connection with a subsequent transfer or foreclosure following default by the Purchaser transferee of the pledge. No notice shall be required of such pledge, but Purchaser’s transferee shall promptly notify the Company of any such subsequent transfer or foreclosure. Each Purchaser acknowledges that the Company shall not be responsible for any pledges relating to, or the grant of any security interest in, any of the Securities or Conversion Shares or for any agreement, understanding or arrangement between any Purchaser and its pledgee or secured party. At the appropriate Purchaser’s expense, the Company will execute and deliver such reasonable documentation as a pledgee or secured party of Securities or Conversion Shares may reasonably request in connection with a pledge or transfer of the Securities or Conversion Shares, as applicable, including the preparation and filing of any required prospectus supplement under Rule 424(b)(3) of the Securities Act or other applicable provision of the Securities Act to appropriately amend the list of selling stockholders thereunder. Each Purchaser acknowledges and agrees that, except as otherwise provided in Section 4.1(c), any Securities or Conversion Shares subject to a pledge or security interest as contemplated by this Section 4.1(b) shall continue to bear the legend set forth in this Section 4.1(b) and be subject to the restrictions on transfer set forth in Section 4.1(b).

(c) Removal of Legends. Once a Registration Statement covering the resale of the Conversion Shares is declared effective, the Company shall remove all restrictive legends, including the legend set forth in Section 4.1(b) above (or, in the event that Conversion Shares are issued upon conversion after the Registration Statement is declared effective, the Conversion Shares shall be issued without restrictive legends). Further, the Company shall remove all restrictive legends, including the legend set forth in Section 4.1(b) above, (i) following any sale of such Securities or Conversion Shares pursuant to Rule 144 or any other applicable exemption from the registration requirements of the Securities Act, or (ii) if such Conversion Shares are eligible for resale under Rule 144(b)(1) or any successor provision (or, in the event that Conversion Shares are issued upon conversion after the conditions set forth in clauses (i) and (ii) above, the Conversion Shares shall be issued without restrictive legends). Without limiting the foregoing, either (i) upon request of the Purchaser, upon receipt by the Company of an opinion of counsel reasonably satisfactory to the Company to the effect that such legend is no longer required under the Securities Act and applicable state securities laws or (ii) as contemplated by the Irrevocable Transfer Agent Instructions, the Company shall promptly cause the legend to be removed from any certificate for any Securities or Conversion Shares in accordance with the terms of this Agreement and deliver, or cause to be delivered, to any Purchaser new certificate(s) representing the Securities or Conversion Shares that are free from all restrictive and other legends or, at the request of such Purchaser, via DWAC transfer to such Purchaser’s account.

(d) Irrevocable Transfer Agent Instructions. The Company shall issue the Irrevocable Transfer Agent Instructions. The Company represents and warrants that no instruction other than the Irrevocable Transfer Agent Instructions referred to in this Section 4.1(d) (or instructions that are consistent therewith) will be given by the Company to its Transfer Agent in connection with this Agreement, and that the Securities and Conversion Shares shall otherwise be freely transferable on the books and records of the Company as and to the extent provided in this Agreement and the other Transaction Documents and applicable law. The Company acknowledges that a breach by it of its obligations under this Section 4.1(d) will cause irreparable harm to a Purchaser. Accordingly, the Company acknowledges that the remedy at law for a breach of its obligations under this Section 4.1(d) may be inadequate and agrees, in the event of a breach or threatened breach by the Company of the provisions of this Section 4.1(d) that a Purchaser shall be entitled, in addition to all other available remedies, to an order and/or injunction restraining any breach and requiring immediate issuance and transfer, without the necessity of showing irreparable harm or economic loss and without any bond or other security being required.

(e) Acknowledgement. Each Purchaser hereunder acknowledges its primary responsibilities under the Securities Act and accordingly will not sell or otherwise transfer the Securities or Conversion Shares or any interest therein without complying with the requirements of the Securities Act.

4.2 Furnishing of Information. In order to enable the Purchasers to sell the Securities and Conversion Shares under Rule 144, until such time as Purchaser may sell the Securities and Conversion Shares without limitation under Rule 144, the Company shall use its commercially reasonable efforts to timely file (or obtain extensions in respect thereof and file within the applicable grace period) all reports required to be filed by the Company after the date hereof pursuant to the Exchange Act and, if during such period, the Company is not required to file reports pursuant to the Exchange Act, it will prepare and furnish to the Purchasers and make publicly available in accordance with Rule 144(c) such information as is required for the Purchasers to sell the Securities and Conversion Shares under Rule 144.

4.3 Integration. The Company shall not, and shall use its commercially reasonable efforts to ensure that no Affiliate of the Company shall, sell, offer for sale or solicit offers to buy or otherwise negotiate in respect of any security (as defined in Section 2 of the Securities Act) that will be integrated with the offer or sale of the Securities in a manner that would require the registration under the Securities Act of the sale of the Securities to the Purchasers, or that will be integrated with the offer or sale of the Securities for purposes of the rules and regulations of any Trading Market such that it would require stockholder approval prior to the closing of such other transaction unless stockholder approval is obtained before the closing of such subsequent transaction; provided, however, that this Section 4.3 shall not limit the Company’s right to issue shares of capital stock pursuant to the Merger Agreement.

4.4 Securities Laws Disclosure; Publicity. By no later than 9:00 A.M., New York City time, on the Trading Day immediately following the date hereof (provided that, if this Agreement is executed between midnight and 9:00 A.M., New York City time on any Trading Day, no later than 9:01 A.M. on the date hereof), the Company shall (a) issue a press release (the “Press Release”) reasonably acceptable to the Placement Agents disclosing all material terms of the transactions contemplated hereby and (b) file a Current Report on Form 8 K with the Commission describing the terms of the Transaction Documents (and including as exhibits to such Current Report on Form 8-K the material Transaction Documents (including, without limitation, this Agreement and the Registration Rights Agreement) and the Corporate Overview dated Q2 2023 provided to the Purchasers in connection with the transactions contemplated hereby); provided that the Press Release shall not publicly disclose the name of any Purchaser or investment adviser of any Purchaser, or include the name of any Purchaser or an Affiliate of any Purchaser without the prior

written consent of such Purchaser. In addition, notwithstanding the foregoing, the Company shall not publicly disclose the name of any Purchaser or investment adviser of any Purchaser, or include the name of any Purchaser or an Affiliate of any Purchaser without the prior written consent of such Purchaser (i) in any press release or marketing materials or (ii) in any filing with the Commission or any regulatory agency or Trading Market, except as required by U.S. federal securities law (A) in connection with any registration statement contemplated by the Registration Rights Agreement (which shall be subject to review and comment of the Purchasers pursuant to the terms of the Registration Rights Agreement) or the filing of final Transaction Documents (including signature pages thereto) with the Commission and (B) to the extent such disclosure is required by law, request of the Commission’s staff or Trading Market regulations, in which case the Company shall provide the Purchasers with prior written notice of such disclosure permitted under this subclause (ii). From and after the issuance of the Press Release, no Purchaser shall be in possession of any material, non-public information received from the Company, any Subsidiary or any of their respective officers, directors, employees or agents, that is not disclosed in the Press Release. Each Purchaser, severally and not jointly with the other Purchasers, covenants that until such time as the transactions contemplated by this Agreement are publicly disclosed by the Company pursuant to the Press Release, such Purchaser will maintain the confidentiality of the existence and terms of this transaction and the information provided in connection therewith; provided, however, that any disclosure may be made by the Purchaser to the Purchaser’s representatives or agents, including, but not limited to, the Purchaser’s legal, tax and investment advisors.

4.5 Shareholder Rights Plan. No claim will be made or enforced by the Company or, with the consent of the Company, any other Person, that any Purchaser is an “Acquiring Person” under any control share acquisition, business combination, poison pill (including any distribution under a rights agreement) or similar anti-takeover plan or arrangement or Law (including Section 203 of the Delaware General Corporation Law) in effect or hereafter adopted by the Company, or that any Purchaser could be deemed to trigger the provisions of any such plan or arrangement, in either case solely by virtue of receiving Securities or Conversion Shares under the Transaction Documents.

4.6 Non-Public Information. Except with respect to the material terms and conditions of the transactions contemplated by the Transaction Documents, including this Agreement, or as expressly required by any applicable securities law, the Company covenants and agrees that neither it, nor any other Person acting on its behalf, will provide any Purchaser or its agents or counsel with any information regarding the Company that the Company believes constitutes material non-public information without the express written (email being sufficient) consent of such Purchaser, (i) unless prior thereto such Purchaser shall have committed to customary obligations regarding the confidentiality and use of such information and (ii) except in the case of material, nonpublic information provided to an observer of the Company’s or Spyre’s board of directors or member of the Company’s or Spyre’s board of directors who is affiliated with such Purchaser. The Company understands and confirms that each Purchaser shall be relying on the foregoing covenant in effecting transactions in securities of the Company.

4.7 Use of Proceeds. The Company shall use the net proceeds from the sale of the Securities hereunder for working capital and general corporate purposes.

4.8 Principal Trading Market Listing. The Company shall use its reasonable best efforts to take all steps necessary to cause the Conversion Shares to be approved for listing on the Principal Trading Market as promptly as possible.

4.9 Form D; Blue Sky. The Company agrees to timely file a Form D with respect to the Securities as required under Regulation D and to provide a copy thereof, promptly upon the written request of any Purchaser. The Company, on or before the Closing Date, shall take such action as the Company shall reasonably determine is necessary in order to obtain an exemption for or to qualify the Securities for sale

to the Purchasers under applicable securities or “blue sky” Laws of the states of the United States (or to obtain an exemption from such qualification) and shall provide evidence of such actions promptly upon the written request of any Purchaser.

4.10 Short Sales After the Date Hereof. Such Purchaser shall not engage, directly or indirectly, in any transactions in the Company’s securities (including, without limitation, any Short Sales involving the Company’s securities) during the period from the date hereof until the earlier of such time as (i) the transactions contemplated by this Agreement are first publicly announced as required by and described in Section 4.4 or (ii) this Agreement is terminated in full pursuant to Section 6.18.

Notwithstanding the foregoing, no Purchaser makes any representation, warranty or covenant hereby that it will not engage in Short Sales in the securities of the Company after the time that the transactions contemplated by this Agreement are first publicly announced as described in Section 4.4; provided, however, each Purchaser agrees, severally and not jointly with any Purchasers, that they will not enter into any Net Short Sales (as hereinafter defined) from the period commencing on the Closing Date and ending on the earliest of (x) the Effective Date, (y) the twenty-four (24) month anniversary of the Closing Date or (z) the date that such Purchaser no longer holds any Securities. For purposes of this Section 4.12, a “Net Short Sale” by any Purchaser shall mean a sale of Common Stock by such Purchaser that is marked by such Purchaser as a short sale and that is made at a time when there is no equivalent offsetting long position in Common Stock held by such Purchaser. Notwithstanding the foregoing, in the event that a Purchaser is a multi-managed investment vehicle whereby separate portfolio managers manage separate portions of such Purchaser’s assets and the portfolio managers have no direct knowledge of the investment decisions made by the portfolio managers managing other portions of such Purchaser’s assets, the representation set forth above shall apply only with respect to the portion of assets managed by the portfolio manager that have knowledge about the financing transaction contemplated by this Agreement. Moreover, notwithstanding the foregoing, in the event that a Purchaser has sold Securities pursuant to Rule 144 prior to the Effective Date and the Company has failed to deliver certificates without legends prior to the settlement date for such sale (assuming that such certificates meet the requirements set forth in Section 4.1(c) for the removal of legends), the provisions of this Section 4.10 shall not prohibit the Purchaser from entering into Net Short Sales for the purpose of delivering shares of Common Stock in settlement of such sale. Each Purchaser understands and acknowledges, severally and not jointly with any other Purchaser, that the Commission currently takes the position that covering a short position established prior to effectiveness of a resale registration statement with shares included in such registration statement would be a violation of Item 239.10 of the Securities Act Sections Compliance and Disclosure Interpretations issued by the Commission’s Division of Corporation Finance.

4.11 Beneficial Ownership Limitation. Notwithstanding anything to the contrary set forth in the Certificate of Designation, the Company shall not effect any conversion of any share of Series A Preferred Stock, and a Purchaser shall not have the right to convert any portion of its Series A Preferred Stock, to the extent that, after giving effect to such attempted conversion set forth on an applicable Notice of Conversion (as defined in the Certificate of Designation) with respect to the Series A Preferred Stock, such Purchaser (or any of such Purchaser’s Affiliates or any other Person who would be a beneficial owner of Common Stock beneficially owned by the Purchaser for purposes of Section 13(d) or Section 16 of the Exchange Act and the applicable rules and regulations of the Commission, including any “group” of which the Purchaser is a member (the foregoing, “Attribution Parties”)) would beneficially own a number of shares of Common Stock in excess of the Beneficial Ownership Limitation (as defined below). For purposes of the foregoing sentence, the aggregate number of shares of Common Stock beneficially owned by such Purchaser and its Attribution Parties shall include the number of shares of Common Stock issuable upon conversion of the Series A Preferred Stock subject to the Notice of Conversion or the Automatic Conversion, as applicable, with respect to which such determination is being made, but shall exclude the number of shares of Common Stock which are issuable upon (i) conversion of the remaining, unconverted

Series A Preferred Stock beneficially owned by such Purchaser or any of its Attribution Parties, and (ii) exercise or conversion of the unexercised or unconverted portion of any other securities of the Company beneficially owned by such Purchaser or any of its Attribution Parties that are subject to and would exceed a limitation on conversion or exercise similar to the limitation contained herein. Except as set forth in the preceding sentence, for purposes of this Section 4.11, beneficial ownership shall be calculated in accordance with Section 13(d) of the Exchange Act and the applicable rules and regulations of the Commission, and the terms “beneficial ownership” and “beneficially own” have the meanings ascribed to such terms therein. In addition, for purposes hereof, “group” has the meaning set forth in Section 13(d) of the Exchange Act and the applicable rules and regulations of the Commission. For purposes of this Section 4.11, in determining the number of outstanding shares of Common Stock, a Purchaser may rely on the number of outstanding shares of Common Stock as stated in the most recent of the following: (i) the Company’s most recent periodic or annual filing with the Commission, as the case may be, (ii) a more recent public announcement by the Company that is filed with the Commission, or (iii) a more recent notice by the Company or the Company’s transfer agent to the Purchaser setting forth the number of shares of Common Stock then outstanding. For any reason at any time, upon the written request of a Purchaser (which may be by e-mail), the Company shall, within two (2) Trading Days of such request, confirm in writing to such Purchaser (which may be by e-mail) the number of shares of Common Stock then outstanding. In any case, the number of outstanding shares of Common Stock shall be determined after giving effect to any actual conversion or exercise of securities of the Company, including Series A Preferred Stock, by such Purchaser or its Attribution Parties since the date as of which such number of outstanding shares of Common Stock was last publicly reported or confirmed to the Purchaser. The “Beneficial Ownership Limitation” shall initially be set at the discretion of each Purchaser to a percentage between 0% and 19.9% of the number of shares of the Common Stock outstanding or deemed to be outstanding as of the applicable measurement date, and such percentage shall be set at 19.9% for any Holder that does not make such designation on the signature page hereto The Company shall be entitled to rely on representations made to it by any Purchaser in any Notice of Conversion regarding its Beneficial Ownership Limitation. Notwithstanding the foregoing, by written notice to the Company, (i) any Purchaser may reset the Beneficial Ownership Limitation percentage to a higher percentage, not to exceed 19.9%, which increase will not be effective until the sixty-first (61st) day after such written notice is delivered to the Company, and (ii) any Purchaser may reset the Beneficial Ownership Limitation percentage to a lower percentage provided that such decrease shall not become effective until the later of (x) 5:00 p.m. Eastern time on the third Business Day after the date of the Stockholder Approval and (y) if Stockholder Approval is not obtained within six months after the initial issuance of the Series A Preferred Stock, the date that is three Business Days after the date that is six months after the initial issuance of the Series A Preferred Stock. Upon such a change by a Purchaser of the Beneficial Ownership Limitation, not to exceed 19.9%, the Beneficial Ownership Limitation may not be further amended by such Purchaser without first providing the minimum notice required by this Section 4.11. Notwithstanding the foregoing, at any time following notice of a Fundamental Transaction, the Purchaser may waive and/or change the Beneficial Ownership Limitation effective immediately upon written notice to the Company and may reinstitute a Beneficial Ownership Limitation at any time thereafter effective immediately upon written notice to the Company. The provisions of this Section 4.11 shall be construed, corrected and implemented in a manner so as to effectuate the intended Beneficial Ownership Limitation herein contained and the shares of Common Stock underlying the Securities in excess of the Beneficial Ownership Limitation shall not be deemed to be beneficially owned by the Purchaser for any purpose including for purposes of Section 13(d) or Rule 16a-1(a)(1) of the Exchange Act.

4.12 Requisite Stockholder Approval. The Company shall hold a special meeting of stockholders (a “Stockholder Meeting”) within 75 days from the Closing (the “Stockholder Meeting Deadline”) for the purpose of obtaining stockholder approval of the conversion of all issued and outstanding Series A Preferred Stock into shares of Common Stock in accordance with the Nasdaq Stock Market Rules (the “Requisite Stockholder Approval”). The Company shall use its best efforts to solicit its stockholders’ approval of such resolution and to cause the Board of Directors to recommend to the stockholders that they

approve such resolution. If the Requisite Stockholder Approval is not obtained on or prior to the Stockholder Meeting Deadline, the Company shall cause an additional Stockholder Meeting to be held within 90 days from the prior meeting (the “Extended Stockholder Approval Period”). If the Requisite Stockholder Approval is not obtained within the Extended Stockholder Approval Period, then the Company shall convene additional stockholder meetings every 90 days thereafter until the Requisite Stockholder Approval is obtained. The Company shall enforce the terms of each Support Agreement, and shall not amend or waive any provision of any Support Agreement.

4.13 Conversion and Exercise Procedures. The form of Notice of Conversion included in the Certificate of Designation sets forth the totality of the procedures required of the Purchasers in order to convert the Securities. Without limiting the preceding sentence, no ink-original Notice of Conversion shall be required, nor shall any medallion guarantee (or other type of guarantee or notarization) of any Notice of Conversion form be required in order for the registered holder thereof to convert the Securities. No additional legal opinion, other information or instructions shall be required of a Purchaser to convert its Securities. The Company shall honor conversions of the Securities and shall deliver Conversion Shares in accordance with the terms, conditions and time periods set forth in the Transaction Documents.

4.14 Lock-Up Agreements. The Company shall not consent or agree to amend, alter, waive or otherwise modify the terms of any of the Lock-Up Agreements (as defined in the Merger Agreement) without the consent of the Placement Agents.

4.15 Indemnification of Purchasers. Subject to the provisions of this Section 4.15, the Company will indemnify and hold each Purchaser and its directors, officers, shareholders, members, partners, employees, investment advisers and agents (and any other Persons with a functionally equivalent role of a Person holding such titles notwithstanding a lack of such title or any other title), each Person who controls such Purchaser (within the meaning of Section 15 of the Securities Act and Section 20 of the Exchange Act), and the directors, officers, shareholders, agents, members, partners, investment advisers or employees (and any other Persons with a functionally equivalent role of a Person holding such titles notwithstanding a lack of such title or any other title) of such controlling persons (each, a “Purchaser Party”) harmless from any and all losses, liabilities, obligations, claims, contingencies, damages, costs and expenses, including all judgments, amounts paid in settlements, court costs and reasonable attorneys’ fees and costs of investigation that any such Purchaser Party may suffer or incur as a result of or relating to (i) any breach of any of the representations, warranties, covenants or agreements made by the Company in this Agreement or in the other Transaction Documents or (ii) any Action instituted against a Purchaser in any capacity, or any Purchaser Party, by any stockholder of the Company who is not an Affiliate of such Purchaser seeking indemnification, with respect to any of the transactions contemplated by the Transaction Documents (unless such Action is based upon a breach of such Purchaser’s representations, warranties or covenants under the Transaction Documents). Promptly after receipt by any such Person (the “Indemnified Person”) of notice of any demand, claim or circumstances that would or may give rise to a claim or the commencement of any Proceeding or investigation in respect of which indemnity may be sought pursuant to this Section 4.15, such Indemnified Person shall promptly notify the Company in writing and the Company shall assume the defense thereof, including the employment of counsel reasonably satisfactory to such Indemnified Person, and shall assume the payment of all fees and expenses relating to such Proceeding or investigation; provided, however, that the failure of any Indemnified Person so to notify the Company shall not relieve the Company of its obligations hereunder except to the extent that the Company is actually and materially prejudiced by such failure to notify. In any such proceeding, any Indemnified Person shall have the right to retain its own counsel, but the fees and expenses of such counsel shall be at the expense of such Indemnified Person unless: (i) the Company and the Indemnified Person shall have mutually agreed to the retention of such counsel; (ii) the Company shall have failed promptly to assume the defense of such proceeding and to employ counsel reasonably satisfactory to such Indemnified Person in such proceeding; or (iii) in the reasonable judgment of counsel to such Indemnified Person, representation

of both parties by the same counsel would be inappropriate due to actual or potential differing interests between them. In the event of the circumstances described in the foregoing clause (iii), if the Indemnified Person notifies the Company in writing that such Indemnified Person elects to employ separate counsel at the expense of the Company, then the Company shall not have the right to assume the defense of such claim on behalf of such Indemnified Person. The Company shall not be liable for any settlement of any proceeding effected without its prior written consent, which consent shall not be unreasonably withheld, delayed or conditioned or to the extent fees or costs incurred pursuant to this Section 4.15 are attributable to the Indemnified Person’s breach of any of the representations, warranties, covenants or agreements made by the Purchasers in this Agreement or the other Transaction Documents. Without the prior written consent of the Indemnified Person, which consent shall not be unreasonably withheld, delayed or conditioned, the Company shall not effect any settlement of any pending or threatened proceeding in respect of which any Indemnified Person is or could have been a party and indemnity could have been sought hereunder by such Indemnified Person, unless such settlement includes an unconditional release of such Indemnified Person from all liability arising out of such proceeding.

4.16 Equal Treatment of Purchasers. No consideration shall be offered or paid to any Purchaser to amend or consent to a waiver or modification of any provision of this Agreement unless the same consideration is also offered to all of the Purchasers. For clarification purposes, this provision constitutes a separate right granted to each Purchaser by the Company and negotiated separately by each Purchaser and shall not in any way be construed as the Purchasers acting in concert or as a group with respect to the purchase, disposition or voting of shares of Common Stock or otherwise.

ARTICLE 5

CONDITIONS PRECEDENT TO CLOSING

5.1 Conditions Precedent to the Obligations of the Purchasers to Purchase Securities. The obligation of each Purchaser to acquire Securities at the Closing is subject to the fulfillment to such Purchaser’s satisfaction, on or prior to the Closing Date, of each of the following conditions, any of which may be waived by such Purchaser (as to itself only):

(a) Representations and Warranties. The representations and warranties of the Company contained herein shall be true and correct in all material respects (except for those representations and warranties which are qualified as to materiality, in which case such representations and warranties shall be true and correct in all respects) as of the date when made and as of the Closing Date, as though made on and as of such date, except for such representations and warranties that speak as of a specific date, which shall be true and correct in all material respects (except for those representations and warranties which are qualified as to materiality or Material Adverse Effect, which representations and warranties shall be true and correct in all respects) as of such date.

(b) Performance. The Company shall have performed, satisfied and complied in all material respects with all covenants, agreements and conditions required by the Transaction Documents to be performed, satisfied or complied with by it at or prior to the Closing.

(c) No Injunction. No statute, rule, regulation, order, executive order, decree, judgment, writ, order, ruling or injunction shall have been enacted, entered, promulgated, issued or endorsed by any court of competent jurisdiction or any Governmental Authority that enjoins, prevents or prohibits the consummation of any of the transactions contemplated by the Transaction Documents.

(d) Consents. The Company shall have obtained in a timely fashion any and all consents, permits, approvals, registrations and waivers necessary for consummation of the purchase and sale of the Securities (except for the Requisite Stockholder Approval), all of which shall be and remain so long as necessary in full force and effect.

(e) Adverse Changes. Since the date of execution of this Agreement, no event or series of events shall have occurred that has had or would reasonably be expected to have a Material Adverse Effect.

(f) No Suspensions of Trading in Common Stock; No Stop Orders; Listing. The Common Stock shall not have been suspended by the Commission or the Principal Trading Market from trading on the Principal Trading Market nor shall suspension by the Commission or the Principal Trading Market have been threatened, either (i) in writing by the Commission or the Principal Trading Market or (ii) by falling below the minimum listing maintenance requirements of the Principal Trading Market. No stop order shall have been imposed by Nasdaq, the Commission or any other Governmental Authority or regulatory body with respect to public trading in the Common Stock. Nasdaq shall have raised no objection to the consummation of the transactions contemplated by the Transaction Documents or the Merger Agreement.

(g) Company Deliverables. The Company shall have delivered the Company Deliverables in accordance with Section 2.3(a).

(h) Compliance Certificate. The Company shall have delivered to each Purchaser a certificate, dated as of the Closing Date and signed by its Chief Executive Officer and its Chief Financial Officer, dated as of the Closing Date, certifying to the fulfillment of the conditions specified in Sections 5.1(a), (b), (f) and (i) in the form attached hereto as Exhibit F.

(i) Merger. The Merger shall have been consummated in accordance with the Merger Agreement.

(j) Termination. This Agreement shall not have been terminated as to such Purchaser in accordance with Section 6.18 herein.

5.2 Conditions Precedent to the Obligations of the Company to issue Securities. The Company’s obligation to issue the Securities at the Closing to each Purchaser is subject to the fulfillment to the satisfaction of the Company on or prior to the Closing Date of the following conditions, any of which may be waived by the Company:

(a) Representations and Warranties. The representations and warranties made by each Purchaser in Section 3.2 hereof shall be true and correct in all material respects (except for those representations and warranties which are qualified as to materiality, in which case such representations and warranties shall be true and correct in all respects) as of the date when made, and as of the Closing Date as though made on and as of such date, except for representations and warranties that speak as of a specific date, which shall be true and correct in all material respects (except for those representations and warranties which are qualified as to materiality or Material Adverse Effect, which representations and warranties shall be true and correct in all respects) as of such date.

(b) Performance. Such Purchaser shall have performed, satisfied and complied in all material respects with all covenants, agreements and conditions required by the Transaction Documents to be performed, satisfied or complied with by such Purchaser at or prior to the Closing Date.

(d) Purchasers Deliverables. Such Purchaser shall have delivered its Purchaser Deliverables in accordance with Section 2.3(b).

(e) Merger. The Merger shall have been consummated in accordance with the Merger Agreement (which shall not have been amended in any manner that is materially and adversely affects the Purchasers).

(f) Termination. This Agreement shall not have been terminated as to such Purchaser in accordance with Section 6.18 herein.

ARTICLE 6

MISCELLANEOUS

6.1 Fees and Expenses. The Company and the Purchasers shall each pay the fees and expenses of their respective advisers, counsel, accountants and other experts, if any, and all other expenses incurred by such party in connection with the negotiation, preparation, execution, delivery and performance of this Agreement. The Company shall pay all Transfer Agent fees, stamp taxes and other taxes and duties levied in connection with the issuance and sale of the Securities to the Purchasers.

6.2 Entire Agreement. The Transaction Documents, together with the exhibits and schedules thereto, contain the entire understanding of the parties with respect to the subject matter hereof and thereof and supersede all prior agreements, understandings, discussions and representations, oral or written, with respect to such matters, which the parties acknowledge have been merged into such documents, exhibits and schedules. Before or at the Closing, the Company and the Purchasers will execute and deliver to the other such further documents as may be reasonably requested in order to give practical effect to the intention of the parties under the Transaction Documents.

6.3 Notices. Any and all notices or other communications or deliveries required or permitted to be provided hereunder shall be in writing and shall be deemed given and effective on the earliest of (a) the date of transmission, if such notice or communication is delivered via electronic mail at the e-mail address specified in this Section 6.3 prior to 5:00 P.M., New York City time, on a Trading Day, (b) the next Trading Day after the date of transmission, if such notice or communication is delivered via electronic mail at the e- mail address or facsimile number specified in this Section 6.3 on a day that is not a Trading Day or later than 5:00 P.M., New York City time, on any Trading Day, (c) the Trading Day following the date of mailing, if sent by U.S. nationally recognized overnight courier service with next day delivery specified, or (d) upon actual receipt by the party to whom such notice is required to be given if delivered personally or if sent by U.S. certified or registered mail, return receipt requested; provided, in the case of clauses (a) and (b), that notice shall not be deemed given or effective if the sender receives an automatic system-generated response that such electronic mail was undeliverable. The address for such notices and communications shall be as follows:


		If to the Company:		Aeglea BioTherapeutics, Inc.
				805 Las Cimas Parkway Suite 100, Austin, TX 78746
				Telephone No.: (857) 222-4199
				Attention: Jonathan Alspaugh, Chief Financial Officer
				E-mail: [***]


		With a copy to:		Cooley LLP
				110 N. Upper Wacker Dr., Suite 4200, Chicago, IL 60606
				Telephone No.: [***]
				Attention: Courtney Tygesson
				E-mail: [***]

		If to a Purchaser:		To the address set forth under such Purchaser’s name on Annex A hereto;

or such other address as may be designated in writing hereafter, in the same manner, by such Person.

6.4 Amendments; Waivers; No Additional Consideration. No provision of this Agreement may be waived, modified, supplemented or amended except in a written instrument signed, in the case of an amendment, by the Company and the Purchasers of at least a majority in interest of the Securities still held by Purchasers, provided that (i) no amendment to Section 4.4, Section 4.6, Section 4.10, Section 4.11 Section 4.12, Section 4.15, Section 4.16, this Section 6.4 or Section 6.18 may be made without the consent of each Purchaser, or, in the case of a waiver, by the party against whom enforcement of any such waiver is sought and (ii) any proposed amendment that would, by its terms, have a disproportionate and materially adverse effect on any Purchaser shall require the consent of such Purchaser(s). No waiver of any default with respect to any provision, condition or requirement of this Agreement shall be deemed to be a continuing waiver in the future or a waiver of any subsequent default or a waiver of any other provision, condition or requirement hereof, nor shall any delay or omission of either party to exercise any right hereunder in any manner impair the exercise of any such right. No consideration shall be offered or paid to any Purchaser to amend or consent to a waiver or modification of any provision of any Transaction Document unless the same consideration is also offered to all Purchasers who then hold Securities.

6.5 Construction. The headings herein are for convenience only, do not constitute a part of this Agreement and shall not be deemed to limit or affect any of the provisions hereof. The language used in this Agreement will be deemed to be the language chosen by the parties to express their mutual intent, and no rules of strict construction will be applied against any party. This Agreement shall be construed as if drafted jointly by the parties, and no presumption or burden of proof shall arise favoring or disfavoring any party by virtue of the authorship of any provisions of this Agreement or any of the Transaction Documents. As used in this Agreement, the words “include” and “including,” and variations thereof, shall not be deemed to be terms of limitation, but rather shall be deemed to be followed by the words “without limitation.”

6.6 Successors and Assigns. The provisions of this Agreement shall inure to the benefit of and be binding upon the parties and their successors and permitted assigns. This Agreement, or any rights or obligations hereunder, may not be assigned by the Company without the prior written consent of each Purchaser. Any Purchaser may assign its rights hereunder in whole or in part to any Person to whom such Purchaser assigns or transfers any Securities in compliance with the Transaction Documents and applicable law, provided such transferee shall agree in writing to be bound, with respect to the transferred Securities, by the terms and conditions of this Agreement that apply to the Purchasers.

6.7 No Third-Party Beneficiaries. This Agreement is intended for the benefit of the parties hereto and their respective successors and permitted assigns and is not for the benefit of, nor may any provision hereof be enforced by, any other Person, except the Placement Agents are intended third-party beneficiaries of the representations and warranties in Article 3 and Article 4, and of this Section 6.7 and Section 6.19.

6.8 Governing Law. All questions concerning the construction, validity, enforcement and interpretation of this Agreement shall be governed by and construed and enforced in accordance with the internal laws of the State of New York, without regard to the principles of conflicts of law thereof. Each party agrees that all Proceedings concerning the interpretations, enforcement and defense of the transactions contemplated by this Agreement and any other Transaction Documents (whether brought against a party hereto or its respective Affiliates, employees or agents) shall be commenced exclusively in the New York Courts. Each party hereto hereby irrevocably submits to the exclusive jurisdiction of the New York Courts for the adjudication of any dispute hereunder or in connection herewith or with any transaction contemplated hereby or discussed herein (including with respect to the enforcement of any of the Transaction Documents), and hereby irrevocably waives, and agrees not to assert in any Proceeding, any claim that it is not personally subject to the jurisdiction of any such New York Court, or that such Proceeding has been commenced in an improper or inconvenient forum. Each party hereto hereby irrevocably waives personal service of process and consents to process being served in any such Proceeding by mailing a copy thereof via registered or certified mail or overnight delivery (with evidence of delivery) to such party at the address in effect for notices to it under this Agreement and agrees that such service shall constitute good and sufficient service of process and notice thereof. Nothing contained herein shall be deemed to limit in any way any right to serve process in any manner permitted by law. EACH PARTY HERETO HEREBY IRREVOCABLY WAIVES, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY LEGAL PROCEEDING ARISING OUT OF OR RELATING TO THIS AGREEMENT OR THE TRANSACTIONS CONTEMPLATED HEREBY.

6.9 Survival. Subject to applicable statute of limitations, the representations, warranties, agreements and covenants contained herein shall survive the Closing and the delivery of the Securities.

6.10 Execution. This Agreement may be executed in two or more counterparts, all of which when taken together shall be considered one and the same agreement and shall become effective when counterparts have been signed by each party and delivered to the other party, it being understood that both parties need not sign the same counterpart. In the event that any signature is delivered by facsimile transmission, or by e-mail delivery of a “.pdf” format data file, or by any electronic signature complying with the U.S. ESIGN Act of 2000 or the New York Electronic Signatures and Records Act, such signature shall create a legally valid and binding obligation of the party executing (or on whose behalf such signature is executed) with the same force and effect as if such facsimile or “.pdf” signature page were an original thereof.

6.11 Severability. If any provision of this Agreement is held to be invalid or unenforceable in any respect, the validity and enforceability of the remaining terms and provisions of this Agreement shall not in any way be affected or impaired thereby and the parties will attempt to agree upon a valid and enforceable provision that is a reasonable substitute therefor, and upon so agreeing, shall incorporate such substitute provision in this Agreement.

6.12 Rescission and Withdrawal Right. Notwithstanding anything to the contrary contained in (and without limiting any similar provisions of) the Transaction Documents, whenever any Purchaser exercises a right, election, demand or option under a Transaction Document and the Company does not timely perform its related obligations within the periods therein provided, then such Purchaser may rescind or withdraw, in its sole discretion from time to time upon written notice to the Company, any relevant notice, demand or election in whole or in part without prejudice to its future actions and rights.

6.13 Replacement of Securities. If any certificate or instrument evidencing any Securities or Conversion Shares is mutilated, lost, stolen or destroyed, the Company may issue or cause to be issued in exchange and substitution for and upon cancellation thereof, or in lieu of and substitution therefor, a new

certificate or instrument, but only upon receipt of evidence reasonably satisfactory to the Company and the Transfer Agent of such loss, theft or destruction and the execution by the holder thereof of a customary lost certificate affidavit of that fact and an agreement to indemnify and hold harmless the Company and the Transfer Agent for any losses in connection therewith or, if required by the Transfer Agent, a bond in such form and amount as is required by the Transfer Agent. The applicants for a new certificate or instrument under such circumstances shall also pay any reasonable third-party costs associated with the issuance of such replacement Securities or Conversion Shares. If a replacement certificate or instrument evidencing any Securities or Conversion Shares is requested due to a mutilation thereof, the Company may require delivery of such mutilated certificate or instrument as a condition precedent to any issuance of a replacement.

6.14 Remedies. In addition to being entitled to exercise all rights provided herein or granted by Law, including recovery of damages, each of the Purchasers and the Company will be entitled to specific performance under the Transaction Documents, without the requirement of posting a bond. The parties agree that monetary damages may not be adequate compensation for any loss incurred by reason of any breach of obligations described in the foregoing sentence and hereby agree to waive in any action for specific performance of any such obligation (other than in connection with any action for a temporary restraining order) the defense that a remedy at law would be adequate.

6.15 Payment Set Aside. To the extent that the Company makes a payment or payments to any Purchaser pursuant to any Transaction Document or a Purchaser enforces or exercises its rights thereunder, and such payment or payments or the proceeds of such enforcement or exercise or any part thereof are subsequently invalidated, declared to be fraudulent or preferential, set aside, recovered from, disgorged by or are required to be refunded, repaid or otherwise restored to the Company, a trustee, receiver or any other person under any Law (including, without limitation, any bankruptcy law, state or federal law, common law or equitable cause of action), then to the extent of any such restoration the obligation or part thereof originally intended to be satisfied shall be revived and continued in full force and effect as if such payment had not been made or such enforcement or setoff had not occurred.

6.16 Adjustments in Share Numbers and Prices. In the event of any stock split, subdivision, dividend or distribution payable in shares of Common Stock (or other securities or rights convertible into, or entitling the holder thereof to receive directly or indirectly shares of Common Stock), combination or other similar recapitalization or event occurring after the date hereof and prior to the Closing, each reference in any Transaction Document to a number of shares or a price per share shall be deemed to be amended to appropriately account for such event.

6.17 Independent Nature of Purchasers’ Obligations and Rights. The obligations of each Purchaser under any Transaction Document are several and not joint with the obligations of any other Purchaser, and no Purchaser shall be responsible in any way for the performance of the obligations of any other Purchaser under any Transaction Document. The decision of each Purchaser to purchase Securities pursuant to the Transaction Documents has been made by such Purchaser independently of any other Purchaser and independently of any information, materials, statements or opinions as to the business, affairs, operations, assets, properties, liabilities, results of operations, condition (financial or otherwise) or prospects of the Company or any Subsidiary which may have been made or given by any other Purchaser or by any agent or employee of any other Purchaser, and no Purchaser and any of its agents or employees shall have any liability to any other Purchaser (or any other Person) relating to or arising from any such information, materials, statement or opinions. Nothing contained herein or in any Transaction Document, and no action taken by any Purchaser pursuant thereto, shall be deemed to constitute the Purchasers as a partnership, an association, a joint venture or any other kind of entity, or create a presumption that the Purchasers are in any way acting in concert or as a group (including, without limitation, a “group” within the meaning of Section 13(d)(3) of the Exchange Act) with respect to such obligations or the transactions

contemplated by the Transaction Documents. Each Purchaser acknowledges that no other Purchaser has acted as agent for such Purchaser in connection with making its investment hereunder and that no Purchaser will be acting as agent of such Purchaser in connection with monitoring its investment in the Securities or enforcing its rights under the Transaction Documents. Each Purchaser shall be entitled to independently protect and enforce its rights, including without limitation the rights arising out of this Agreement or out of the other Transaction Documents, and it shall not be necessary for any other Purchaser to be joined as an additional party in any proceeding for such purpose. Each Purchaser has been represented by its own separate legal counsel in its review and negotiation of the Transaction Documents. For reasons of administrative convenience only, Purchasers and their respective counsels may choose to communicate with the Company through Covington & Burling LLP, counsel to the Placement Agents. Each Purchaser acknowledges that Covington & Burling LLP has rendered legal advice to the Placement Agents and not to such Purchaser in connection with the transactions contemplated hereby, and that each such Purchaser has relied for such matters on the advice of its own respective counsel. The Company has elected to provide all Purchasers with the same terms and Transaction Documents for the convenience of the Company and not because it was required or requested to do so by any Purchaser. It is expressly understood that each provision contained in this Agreement is between the Company and a Purchaser, solely, and not between the Company and the Purchasers collectively and not between and among the Purchasers.

6.18 Termination. This Agreement may be terminated and the sale and purchase of the Securities abandoned at any time prior to the Closing (i) automatically if the Closing has not been consummated on or prior to 5:00 P.M., New York City time, on Outside Date, (ii) by a Purchaser (with respect to itself) if any of the conditions set forth in Section 5.1 shall have become incapable of fulfillment, and shall not have been waived by such Purchaser, or (iii) automatically if the Merger Agreement is terminated in accordance with its terms; provided, however, that the right to terminate this Agreement under clause (ii) shall not be available to any Person whose failure to comply with its obligations under this Agreement has been the cause of or resulted in the failure of the Closing to occur on or before such time. Nothing in this Section 6.18 shall be deemed to release any party from any liability for any breach by such party of the terms and provisions of this Agreement or the other Transaction Documents or to impair the right of any party to compel specific performance by any other party of its obligations under this Agreement or the other Transaction Documents. In the event of a termination pursuant to this Section 6.18, the Company shall promptly notify all non-terminating Purchasers. Upon a termination in accordance with this Section 6.18, the Company and the terminating Purchaser(s) shall not have any further obligation or liability (including arising from such termination) to the other, and no Purchaser will have any liability to any other Purchaser under the Transaction Documents as a result therefrom.

6.19 Exculpation of the Placement Agents. Each party hereto agrees for the express benefit of the Placement Agents, their Affiliates and their representatives that:

(a) Each Placement Agent is acting as placement agent for the Company solely in connection with the sale of the Securities and is not acting in any other capacity and is not and shall not be construed as a fiduciary for any Purchaser, or any other person or entity in connection with the sale of Securities.

(b) None of the Placement Agents nor any of their Affiliates or any of their respective representatives (i) shall be liable for any improper payment made in accordance with the information provided by the Company; (ii) has made or will make any representation or warranty, express or implied, of any kind or character, and has not provided any recommendation in connection with the purchase or sale of the Securities; (iii) has any responsibilities as to the validity, accuracy, completeness, value or genuineness, as of any date, of any information, certificates or documentation delivered by or on behalf of the Company pursuant to this Agreement, the other Transaction Documents or the Merger Agreement, or in connection with any of the transactions contemplated by such agreements; (iv) shall be liable or have

any obligation (including, without limitation, for or with respect to any losses, claims, damages, obligations, penalties, judgments, awards, liabilities, costs, expenses or disbursements incurred by any Purchaser, the Company or any other Person or entity), whether in contract, tort or otherwise to any Purchaser or to any person claiming through such Purchaser, (A) for any action taken, suffered or omitted by any of them in good faith and reasonably believed to be authorized or within the discretion or rights or powers conferred upon it by this Agreement, any other Transaction Document or the Merger Agreement, (B) for anything which any of them may do or refrain from doing in connection with this Agreement, any other Transaction Document or the Merger Agreement, or (C) for anything otherwise in connection with the purchase and sale of the Securities or the issuance of the Conversion Shares, except in each case for such party’s own gross negligence or willful misconduct.

6.20 Arm’s Length Transaction. The Company acknowledges and agrees that (i) the transactions described in this Agreement are an arm’s-length commercial transaction between the parties, (ii) the Purchasers have not assumed nor will they assume an advisory or fiduciary responsibility in the Company’s favor with respect to any of the transactions contemplated by this Agreement or the process leading thereto, and the Purchasers have no obligation to the Company with respect to the transactions contemplated by this Agreement except those obligations expressly set forth in this Agreement or the other Transaction Documents to which they are a party, and (iii) the Company’s decision to enter into the Transaction Documents and the Merger Agreement has been based solely on the independent evaluation by the Company and its representatives.

[REMAINDEROF PAGE INTENTIONALLY LEFT BLANK]

IN WITNESS WHEREOF, the parties hereto have caused this Securities Purchase Agreement to be duly executed by their respective authorized signatories as of the date first indicated above.


AEGLEA BIOTHERAPEUTICS, INC.

By:		/s/ Jonathan Alspaugh
Name:		Jonathan Alspaugh
Title:		President and Chief Financial Officer

[SIGNATURE PAGETO SECURITIES PURCHASE AGREEMENT]

IN WITNESS WHEREOF, the parties hereto have caused this Securities Purchase Agreement to be duly executed by their respective authorized signatories as of the date first indicated above.


PURCHASER:

[●]

By:
Name:
Title:

Beneficial Ownership Limitation:

ANNEX A

SCHEDULE OF PURCHASERS

EXHIBIT A

CERTIFICATE OF DESIGNATION

EXHIBIT B

FORM OF REGISTRATION RIGHTS AGREEMENT

EXHIBIT C

STOCK CERTIFICATE QUESTIONNAIRE

Pursuant to Section 2.2(b) of the Agreement, please provide us with the following information:


1.		The exact name that the Securities are to be registered in (this is the name that will appear on the stock certificate(s)). You may use a nominee name if appropriate:

2.		The relationship between the Purchaser of the Securities and the Registered Holder listed in response to Item 1 above:

3.		The mailing address, telephone and telecopy number of the Registered Holder listed in response to Item 1 above:









4.		The U.S. Tax Identification Number (or, if an individual, the U.S. Social Security Number) of the Registered Holder listed in response to Item 1 above:

EXHIBIT D

FORM OF IRREVOCABLE TRANSFER AGENT INSTRUCTIONS

As of ____________, __

American Stock Transfer & Trust Company LLC

1010 El Camino Real – Suite 360

Menlo Park, CA 94025

Attn: Joshua P. McGinn, CEP

Ladies and Gentlemen:

Reference is made to that certain Securities Purchase Agreement, dated as of June 22, 2023 (the “Agreement”), by and among Aeglea BioTherapeutics, Inc., a Delaware corporation (the “Company”), and the purchasers named on the signature pages thereto (collectively, and including permitted transferees, the “Holders”), pursuant to which the Company is issuing to the Holders shares (the “Shares”) of Series A Non-Voting Convertible Preferred Stock, par value $0.0001 per share, which will be convertible into shares (the “Conversion Shares”) of the Company’s common stock, par value $0.0001 per share (the “Common Stock”).

This letter shall serve as our irrevocable authorization and direction to you to issue the Shares as book-entry restricted shares in the names and denominations specified on Schedule I hereto. The Shares have not been registered under the Securities Act of 1933, as amended (the “Securities Act) and are, therefore, “restricted securities. Accordingly, the Shares shall bear the following restrictive legend:

THE OFFER AND SALE OF THE SECURITIES REPRESENTED BY THIS CERTIFICATE TO WHICH THIS CONFIRMATION RELATES HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR THE SECURITIES LAWS OF ANY STATE OF THE UNITED STATES. THE SECURITIES MAY NOT BE SOLD, OFFERED FOR SALE, PLEDGED, HYPOTHECATED, TRANSFERRED OR ASSIGNED IN THE ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT FOR THE SECURITIES UNDER APPLICABLE SECURITIES LAWS, OR UNLESS OFFERED, SOLD, PLEDGED, HYPOTHECATED OR TRANSFERRED PURSUANT TO AN AVAILABLE EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THOSE LAWS. THE COMPANY AND ITS TRANSFER AGENT SHALL BE ENTITLED TO REQUIRE AN OPINION OF COUNSEL SATISFACTORY TO THE COMPANY AND THE TRANSFER AGENT THAT SUCH REGISTRATION IS NOT REQUIRED. NOTWITHSTANDING THE FOREGOING, THE SECURITIES MAY BE PLEDGED IN CONNECTION WITH A BONA FIDE MARGIN ACCOUNT OR OTHER LOAN OR FINANCING ARRANGEMENT SECURED BY THE SECURITIES.

This letter shall also serve as our irrevocable authorization and direction to you (provided that you are the transfer agent of the Company at such time and the conditions set forth in this letter are satisfied), subject to any stop transfer instructions that we may issue to you from time to time, if any, to issue shares of Common Stock upon conversion, transfer or resale of the Shares.

You acknowledge and agree that so long as you have received (a) written confirmation from the Company’s legal counsel that either (1) a registration statement covering resales of the Conversion Shares has been declared effective by the Securities and Exchange Commission (the “Commission”) under the Securities Act of 1933, as amended (the “Securities Act”), or (2) the Conversion Shares have been sold in conformity with Rule 144 under the Securities Act (“Rule 144”) or are eligible for sale under Rule 144, without the requirement for the Company to be in compliance with the current public information required

under Rule 144 as to such securities and without volume or manner-of-sale restrictions and (b) if applicable, a copy of such registration statement, then, unless otherwise required by law, within two (2) Trading Days of your receipt of a properly completed and duly executed conversion notice or a notice of transfer of Shares, you shall issue the certificates representing the Conversion Shares registered in the names of such Holders or transferees, as the case may be, and such certificates shall not bear any legend restricting transfer of the Shares thereby and should not be subject to any stop-transfer restriction.

A form of written confirmation from the Company’s outside legal counsel that a registration statement covering resales of the Conversion Shares has been declared effective by the Commission under the Securities Act is attached hereto as Annex I.

Please be advised that the Holders are relying upon this letter as an inducement to enter into the Agreement and, accordingly, each Holder is a third party beneficiary to these instructions.

Please execute this letter in the space indicated to acknowledge your agreement to act in accordance with these instructions.


Very truly yours,

Aeglea BioTherapeutics, Inc.

By:

Name:		Jonathan Alspaugh

Title:		President and Chief Financial Officer


Acknowledged and Agreed:

American Stock Transfer & Trust Company LLC

By:

Name:

Title:

Date: ____________, 2023

Annex I

FORM OF NOTICE OF EFFECTIVENESS OF REGISTRATION STATEMENT

American Stock Transfer & Trust Company LLC

1010 El Camino Real – Suite 360

Menlo Park, CA 94025

Attn: Joshua P. McGinn, CEP

Re: Aeglea BioTherapeutics, Inc.

Ladies and Gentlemen:

We are counsel to Aeglea BioTherapeutics, Inc., a Delaware corporation (the “Company”), and have represented the Company in connection with that certain Securities Purchase Agreement, dated as of June 22, 2023, entered into by and among the Company and the purchasers named therein (collectively, the “Purchasers”) pursuant to which the Company issued to the Purchasers shares of the Company’s Series A Non-Voting Convertible Preferred Stock, $0.0001 par value per share (the “Shares”). Pursuant to that certain Registration Rights Agreement of even date, the Company agreed to register the resale of the Company’s common stock, $0.0001 par value per share (the “Common Stock”) issuable upon conversion of the Shares (the “Registrable Securities”), under the Securities Act of 1933, as amended (the “Securities Act”). In connection with the Company’s obligations under the Registration Rights Agreement, ____________ on, __________, the Company filed a Registration Statement on Form S-3 (File No. 333-________) (the “Registration Statement”) with the Securities and Exchange Commission (the “Commission”) relating to the Registrable Securities which names each of the Purchasers as a selling stockholder thereunder and set forth as Exhibit A hereto.

In connection with the foregoing, we advise you that a member of the Commission’s staff has advised us by telephone that the Commission has entered an order declaring the Registration Statement effective under the Securities Act at ________ [a.m.][p.m.] on ____________, ___ , and we have no knowledge, after reviewing the Commission’s “Stop Orders” web page (http://sec.gov/litigation/stoporders.shtml), that any stop order suspending its effectiveness has been issued or that any proceedings for that purpose are pending before, or threatened by, the Commission and the Registrable Securities are available for resale under the Securities Act pursuant to the Registration Statement.

This letter shall serve as our standing notice to you that the Common Stock may be freely transferred by the Purchasers pursuant to the Registration Statement. You need not require further letters from us to effect any future legend-free issuance or reissuance of shares of Common Stock to the Purchasers or the transferees of the Purchasers, as the case may be, as contemplated by the Company’s Irrevocable Transfer Agent Instructions dated ____________, ___, provided at the time of such reissuance, the Company has not otherwise notified you that the Registration Statement is unavailable for the resale of the Registrable Securities. This letter shall serve as our standing instructions with regard to this matter.

Very truly yours,

[INSERT NAME OF COMPANY COUNSEL]

By:

EXHIBIT E

FORM OF SECRETARY’S CERTIFICATE

The undersigned hereby certifies that [●] is the duly elected, qualified and acting Secretary of Aeglea BioTherapeutics, Inc., a Delaware corporation (the “Company”), and that as such [s/he] is authorized to execute and deliver this certificate in the name and on behalf of the Company and in connection with the Securities Purchase Agreement, dated as of____________, 2023, by and among the Company and the purchasers named therein (the “Securities Purchase Agreement”), and further certifies in his official capacity, in the name and on behalf of the Company, the items set forth below. Capitalized terms used but not otherwise defined herein shall have the meaning set forth in the Securities Purchase Agreement.

1. Attached hereto as Exhibit A is a true, correct and complete copy of the resolutions duly adopted by the Board of Directors of the Company at a meeting held on____________ approving the Merger, the Transaction Documents, the Merger Agreement and the transactions contemplated thereby. Such resolutions have not in any way been amended, modified, revoked or rescinded, have been in full force and effect since their adoption to and including the date hereof and are now in full force and effect.

2. Attached hereto as Exhibit B is a true, correct and complete copy of the Certificate of Incorporation of the Company, together with any and all amendments thereto currently in effect, including the Certificate of Designation, and no action has been taken to further amend, modify or repeal such Certificate of Incorporation, the same being in full force and effect in the attached form as of the date hereof

3. Attached hereto as Exhibit C is a true, correct and complete copy of the Bylaws of the Company and any and all amendments thereto currently in effect, and no action has been taken to further amend, modify or repeal such Bylaws, the same being in full force and effect in the attached form as of the date hereof.

4. Each person listed below has been duly elected or appointed to the position(s) indicated opposite his name and is duly authorized to sign the Securities Purchase Agreement and each of the Transaction Documents on behalf of the Company, and the signature appearing opposite such person’s name below is such person’s genuine signature.


Name	Position	Signature

[●]	Chief Executive Officer

[●]	Chief Financial Officer

IN WITNESS WHEREOF, the undersigned has hereunto set his hand as of this ____ day of __________, 2023.

Secretary

I, [●], Chief Executive Officer, hereby certify that [●] is the duly elected, qualified and acting Secretary of the Company and that the signature set forth above is [his]/[her] true signature.

Chief Executive Officer

EXHIBIT A

Resolutions

EXHIBIT B

Certificate of Incorporation

EXHIBIT C

Bylaws

EXHIBIT F

Form of Officer’s Certificate

The undersigned, the Chief Executive Officer and Chief Financial Officer of Aeglea BioTherapeutics, Inc., a Delaware corporation (the “Company”), pursuant to Section 5.1(h) of the Securities Purchase Agreement, dated as of ___________________, by and among the Company and the investors signatory thereto (the “Securities Purchase Agreement”), hereby represents, warrants and certifies as follows (capitalized terms used but not otherwise defined herein shall have the meaning set forth in the Securities Purchase Agreement):

1. The representations and warranties of the Company contained in the Securities Purchase Agreement are true and correct in all material respects (except for those representations and warranties which are qualified as to materiality, in which case, such representations and warranties shall be true and correct in all respects) as of the date when made and as of the date hereof, as though made on and as of such date, except for such representations and warranties that speak as of a specific date, which shall be true and correct in all material respects (except for those representations and warranties which are qualified as to materiality or Material Adverse Effect, which representations and warranties shall be true and correct in all respects) as of such date.

2. The Company has performed, satisfied and complied in all material respects with all covenants, agreements and conditions required by the Transaction Documents to be performed, satisfied or complied with by it at or prior to the date hereof.

3. The conditions set forth in Section 5.1(f) and Section 5.1(i) of the Securities Purchase Agreement have been satisfied.

IN WITNESS WHEREOF, the undersigned has executed this certificate this ____ day of __________, ____.

Chief Executive Officer

Chief Financial Officer

EXHIBIT G

Merger Agreement

Spyre Therapeutics (SYRE) S-1/AIPO registration (amended)