Document:

EX-10.1

 Exhibit 10.1 

ORAGENICS, INC. 

SECURITIES PURCHASE AGREEMENT 

This Securities Purchase Agreement (this “Agreement”) is dated as of November 8, 2017, among Oragenics, Inc., a Florida
corporation (the “Company”), and each purchaser identified on the signature pages 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(2) of 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 sell, upon the terms and conditions stated in this Agreement, that aggregate number of shares of Series B Convertible Preferred Stock set forth below such
Purchaser’s name on the signature page of this Agreement and Warrants as provided herein. 
 C. Contemporaneously with the execution and
delivery of this Agreement, the parties hereto are executing and delivering the Registration Rights Agreement, pursuant to which, among other things, the Company will agree to provide certain registration rights with respect to the Securities under
the Securities Act and the rules and regulations promulgated thereunder and applicable state securities laws. 
 D. Contemporaneously with
the Closing under this Agreement, the Company intends to (i) close on the conversion of a Promissory Note dated May 10, 2017 issued by the Company to Intrexon Corporation (“Intrexon”) in the principal amount of $2,400,000,
together with accounts payable owed to Intrexon and accrued and unpaid interest thereon into shares of Series C Non-Convertible Preferred Stock of the Company (the “Debt Conversion”) and
(ii) the Amendment to June 2012 Stock Issuance Agreement, the Second Amendment to June 2012 Exclusive Channel Agreement, the Second Amendment to June 2015 Stock Issuance Agreement and the Second Amendment to June 2015 Exclusive Channel
Agreement, each by and among the Company, Intrexon Corporation and Intrexon Actobiotics NV and dated as of the Closing Date (collectively, the “ECC Amendments”); 

AGREEMENT 
 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 agree as follows: 

 ARTICLE I 

DEFINITIONS 
 1.1
Recitals. The foregoing recitals are true and correct and are hereby incorporated into this Agreement as if fully set forth herein. 

1.2 Definitions. In addition to the terms defined elsewhere in this Agreement, for all purposes of this Agreement, the following terms
have the meanings set forth in this Section 1.2: 
 “Affiliate” means any Person that, directly or indirectly through
one or more intermediaries, controls or is controlled by or is under common control with a Person as such terms are used in and construed under Rule 144 under the Securities Act. With respect to a Purchaser, any investment fund or managed account
that is managed on a discretionary basis by the same investment manager as such Purchaser will be deemed to be an Affiliate of such Purchaser. 

“Business Day” means any day except Saturday, Sunday, any day which shall be 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” means the Certificate of Designation to be
filed prior to the Closing by the Company with the Secretary of State of Florida in the form of Exhibit A attached hereto. 

“Closing” means the closing of the purchase and sale of the Securities pursuant to Section 2.1. 

“Closing Date” means the Trading Day on which all of the Transaction Documents have been executed and delivered by the
applicable parties thereto, and all conditions precedent to (i) the Purchasers’ obligations to pay the Subscription Amount and (ii) the Company’s obligations to deliver the Securities issuable at the Closing, in each case, have
been satisfied or waived. 
 “Commission” means the Securities and Exchange Commission. 

“Common Stock” means the Common Stock of the Company, par value $0.001 per share, and any other class of securities into
which such securities may hereafter be reclassified or changed into. 
 “Common Stock Equivalents” means any securities of
the Company or the Subsidiaries which would entitle the holder thereof to acquire at any time Common Stock, including, without limitation, any debt, preferred stock, rights, options, warrants or other instrument that is at any time convertible into
or exercisable or exchangeable for, or otherwise entitles the holder thereof to receive, Common Stock. 
 “Company Counsel”
means Shumaker, Loop & Kendrick, LLP, with offices located at 101 E. Kennedy Blvd. Suite 2800, Tampa, Florida 33602. 

“Effective Date” means the date that the initial Registration Statement filed by the Company pursuant to the Registration
Rights Agreement is first declared effective by the Commission. 

  
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 “Exchange Act” means the Securities Exchange Act of 1934, as amended, and the
rules and regulations promulgated thereunder. 
 “GAAP” shall have the meaning ascribed to such term in
Section 3.1(e). 
 “Intellectual Property” shall have the meaning ascribed to such term in Section 3.1(o). 

“Legend Removal Date” shall have the meaning ascribed to such term in Section 4.1(c). 

“Liens” means a lien, charge, security interest, encumbrance, right of first refusal, preemptive right or other restriction.

 “Material Adverse Effect” shall have the meaning assigned to such term in Section 3.1(a). 

“Per Share Purchase Price” equals $0.50. 

“Person” means an individual or 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. 

“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 Party” shall have the meaning
ascribed to such term in Section 4.5. 
 “Registration Rights Agreement” means the Amended and Restated Registration
Rights Agreement, dated the date hereof, among the Company and the Purchasers, in the form of Exhibit B attached hereto. 

“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 Underlying Shares. 
 “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 Documents” shall have the meaning ascribed to such term in Section 3.1(e). 

“Securities” means the Series B Convertible Preferred Stock, the Warrants and the Underlying Shares. 

“Series A A&R Certificate of Designation” means the Amended and Restated Certificate of Designation and Rights of Series
A Convertible Preferred Stock to be filed prior to the Closing by the Company with the Secretary of State of Florida in the form of Exhibit F attached hereto. 

  
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 “Securities Act” means the Securities Act of 1933, as amended, and the rules and
regulations promulgated thereunder. 
 “Series B Convertible Preferred Stock” means the shares of Company Series B
convertible preferred stock to be issued to the Purchasers of which each share of Series B Convertible Preferred Stock is initially convertible into two shares of Common Stock. 

“Shareholder Approval” means such approval as may be required by the applicable rules and regulations of the Trading Market
from the shareholders of the Company with respect to the transactions contemplated by the Transaction Documents, including approval of the convertibility of Shares into Common Stock and the exercisability of the Warrants for Common Stock as required
by NYSE rules. 
 “Shares” means the shares of Series B Convertible Preferred Stock issued or issuable to each Purchaser
pursuant to this Agreement. 
 “Short Sales” include, without limitation, 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 sales and other transactions through non-U.S.
broker dealers or foreign regulated brokers. 
 “Subscription Amount” means, as to each Purchaser, the aggregate amount to
be paid for the Securities purchased hereunder as specified below such Purchaser’s name on the signature page of this Agreement and next to the heading “Subscription Amount,” in United States dollars and in immediately available
funds. 
 “Subsidiary” means any subsidiary of the Company as set forth in the SEC Documents. 

“Trading Day” means a day on which the Common Stock is traded on a Trading Market. 

“Trading Market” means the following markets or exchanges on which the Common Stock is listed or quoted for trading on the
date in question: the American Stock Exchange, the Nasdaq Capital Market, the Nasdaq Global Market, the Nasdaq Global Select Market, the New York Stock Exchange or the OTC Bulletin Board. 

“Transaction Documents” means this Agreement, Registration Rights Agreement, Warrants, Voting Agreement and Certificate of
Designation. 
 “Transfer Agent” means Continental Stock Transfer and Trust Company, and any successor transfer agent of
the Company. 
 “Underlying Shares” means the shares of Common Stock issued and issuable upon conversion of the Series B
Convertible Preferred Stock and upon exercise of the Warrants. 
 “Voting Agreement” means the written agreement, in the
form of Exhibit D attached hereto, of Intrexon Corporation, Harvest Intrexon Enterprise Fund I (AI), L.P., Harvest Intrexon Enterprise Fund I, L.P., the Koski Family Limited Partnership, MSD Credit Opportunity Master Fund, L.P., and
their respective affiliates, such persons who have voting control as of the date hereof, amounting to, in the aggregate, a majority of the issued and outstanding Common Stock. 

  
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 “Warrants” means, collectively, the Common Stock purchase warrants delivered to
the Purchasers at the Closing in accordance with Section 2.2(a) hereof, which Warrants shall be in the form of Exhibit C attached hereto. 

ARTICLE II 
 PURCHASE
AND SALE 
 2.1 Closing. On the Closing Date, upon the terms and subject to the conditions set forth herein, the Company agrees
to sell, and the Purchasers, severally and not jointly, agree to purchase, a number of shares of Series B Convertible Preferred Stock equal to such Purchaser’s Shares of Series B Convertible Preferred Stock as set forth on the signature page
hereto executed by such Purchaser, and Warrants as determined pursuant to Section 2.2(a). Each Purchaser shall deliver to the Company, via wire transfer immediately available funds equal to such Purchaser’s Subscription Amount as set forth
on the signature page hereto executed by such Purchaser and the Company shall deliver to each Purchaser its respective Shares of Series B Convertible Preferred Stock and Warrants as determined pursuant to Section 2.2(a), and the Company and
each Purchaser shall deliver the other items set forth in Section 2.2 deliverable at the Closing. Upon satisfaction of the covenants and conditions set forth in Sections 2.2 and 2.3, the Closing shall occur at the offices of Company Counsel or
such other location as the parties shall mutually agree. 
 2.2 Deliveries. 

(a) On or prior to the Closing Date (unless otherwise indicated below), the Company shall deliver or cause to be delivered to each Purchaser
the following: 
 (i) this Agreement duly executed by the Company; 

(ii) a legal opinion of Company Counsel, substantially in the form of Exhibit E attached hereto; 

(iii) an irrevocable letter of instruction to the transfer agent to issue book entry evidencing a number of shares of Series B Convertible
Preferred Stock equal to such Purchaser’s Shares of Series B Convertible Preferred Stock as set forth on the signature page hereto executed by such Purchaser registered in the name of such Purchaser; 

(iv) a Warrant registered in the name of such Purchaser to purchase up to a number of shares of Common Stock equal to 100% of such
Purchaser’s Subscription Amount divided by the warrant exercise price of $0.31 per share; 
 (v) a Voting Agreement duly executed by
each of Intrexon Corporation, Harvest Intrexon Enterprise Fund I (AI), L.P., Harvest Intrexon Enterprise Fund I, L.P., the Koski Family Limited Partnership and MSD Credit Opportunity Master Fund, L.P.; 

(vi) the Registration Rights Agreement duly executed by the Company; 

(vii) the fully executed ECC Amendments; 

  
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 (viii) the fully executed Debt Conversion Agreement between the Company and Intrexon Corporation
dated as of the date hereof (the “Debt Conversion Agreement”) 
 (ix) evidence of the filing and acceptance of the
Certificate of Designation from the Secretary of State of Florida; and 
 (x) evidence of the filing and acceptance of the Series A A&R
Certificate of Designation from the Secretary of State of Florida. 
 (b) On or prior to the Closing Date, each Purchaser shall deliver or
cause to be delivered to the Company the following: 
 (i) this Agreement duly executed by such Purchaser; 

(ii) such Purchaser’s Closing Subscription Amount by wire transfer to the account specified by the Company; 

(iii) the Voting Agreement duly executed by such Purchaser; and 

(iv) the Registration Rights Agreement duly executed by such Purchaser. 

2.3 Closing Conditions. 

(a) The obligations of the Company hereunder in connection with the Closing are subject to the following conditions being met or waived by the
Company: 
 (i) the accuracy in all material respects when made and on the Closing Date of the representations and warranties of the
Purchasers contained herein (except with respect to representations and warranties which relate to a specific date, in which case such representations and warranties shall continue to be materially accurate as of such date); 

(ii) all obligations, covenants and agreements of the Purchasers required to be performed at or prior to the Closing Date shall have been
performed; 
 (iii) the delivery by the Purchasers of the items set forth in Section 2.2(b) of this Agreement; 

(iv) no statute, rule, regulation, executive order, decree, ruling or injunction shall have been enacted, entered, promulgated or endorsed by
any court or governmental authority of competent jurisdiction that prohibits the consummation of any of the transactions contemplated by the Transaction Documents; 

(v) 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 Shares and the Warrants, all of which shall be and remain so long as necessary in full force and effect. 

(b) The respective obligations of the Purchasers hereunder in connection with the Closing are subject to the following conditions being met or
waived by each Purchaser as to itself: 

  
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 (i) the accuracy in all material respects on the Closing Date of the representations and
warranties of the Company contained herein (except with respect to representations and warranties which relate to a specific date, in which case such representations and warranties shall continue to be materially accurate as of such date); 

(ii) all obligations, covenants and agreements of the Company required to be performed at or prior to the Closing Date shall have been
performed; 
 (iii) the delivery by the Company of the items set forth in Section 2.2(a) of this Agreement and a certificate, dated as
of the Closing Date and signed by its Chief Executive Officer or its Chief Financial Officer, certifying to the fulfillment of the conditions specified in Sections 2.3(b)(i) and (ii); 

(iv) on the Closing Date, trading in the Common Stock shall not have been suspended by the Commission or the Company’s principal Trading
Market (except for any suspension of trading of limited duration agreed to by the Company, which suspension shall be terminated prior to the Closing Date), and, at any time prior to the Closing Date, trading in securities generally as reported by
Bloomberg L.P. shall not have been suspended or limited, or minimum prices shall not have been established on securities whose trades are reported by such service, or on any Trading Market, nor shall a banking moratorium have been declared either by
the United States or New York State authorities; 
 (v) no statute, rule, regulation, executive order, decree, ruling or injunction shall
have been enacted, entered, promulgated or endorsed by any court or governmental authority of competent jurisdiction that prohibits the consummation of any of the transactions contemplated by the Transaction Documents; 

(vi) the Debt Conversion shall have been consummated; and 

(vii) 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 Shares and the Warrants, all of which shall be and remain so long as necessary in full force and effect. 

ARTICLE III 

REPRESENTATIONS AND WARRANTIES 

3.1 Representations and Warranties of the Company. Except as set forth in the SEC Documents, the Company hereby makes the following
representations and warranties to each Purchaser as of the Closing Date: 
 (a) Organization, Good Standing and Power. The Company is
a corporation duly incorporated, validly existing and in good standing under the laws of the State of Florida and has the requisite corporate power to own, lease and operate its properties and assets and to conduct its business as it is now being
conducted and as described in the reports filed by the Company with the Commission pursuant to the reporting requirements of the Exchange Act, since the end of its most recently completed fiscal year through the date hereof, including, without
limitation, its most recent report on Form 10-Q. The Company does not have any material subsidiaries. The Company is qualified to do business as a foreign corporation and is in 

  
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 good standing in every jurisdiction in which the nature of the business conducted or property owned by it makes
such qualification necessary, except for any jurisdiction(s) (alone or in the aggregate) in which the failure to be so qualified will not have a Material Adverse Effect. For the purposes of this Agreement, “Material Adverse Effect”
means any effect on the business, operations, properties or financial condition of the Company that is material and adverse to the Company, taken as a whole, and any condition, circumstance or situation that would prohibit the Company from entering
into and performing any of its obligations hereunder. 
 (b) Authorization; Enforcement. The Company has the requisite corporate power
and authority to enter into and perform the Transaction Documents and to issue the Shares and the Warrants in accordance with the terms hereof. The execution, delivery and performance of the Transaction Documents by the Company and the consummation
by it of the transactions contemplated hereby have been duly and validly authorized by all necessary corporate action, and no further consent or authorization of the Company, its board of directors or stockholders is required. When executed and
delivered by the Company, the Transaction Documents shall constitute a valid and binding obligation of the Company enforceable against the Company in accordance with its terms, except as such enforceability may be limited by applicable bankruptcy,
reorganization, moratorium, liquidation, conservatorship, receivership or similar laws relating to, or affecting generally the enforcement of, creditor’s rights and remedies or by other equitable principles of general application. 

(c) Issuance of Shares. The Shares to be issued and sold hereunder have been duly authorized by all necessary corporate action and, when
issued in accordance with the terms hereof, will be validly issued, fully paid and nonassessable. In addition, the Shares and the Warrants will be free and clear of all liens, claims, charges, security interests or agreements, pledges, assignments,
covenants, restrictions or other encumbrances created by, or imposed by, the Company (collectively, “Encumbrances”) and rights of refusal of any kind imposed by the Company (other than restrictions on transfer under applicable
securities laws) and the holder of such Shares shall be entitled to all rights accorded to a holder of Common Stock. The Company has not issued any shares of Common Stock, shares of Series A preferred stock, options or warrants since its most recent
report on Form 10-Q. 
 (d) No Conflicts; Governmental Approvals. The execution, delivery and
performance of the Transaction Documents by the Company and the consummation by the Company of the transactions contemplated hereby do not and will not (i) violate any provision of the Company’s Articles of Incorporation or Bylaws, each as
amended to date, (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, mortgage, deed of trust, indenture, note, bond, license, lease agreement, instrument or obligation to which the Company is a party or by which the Company’s properties or assets are bound, or (iii) result in a violation of any
federal, state, local or foreign statute, rule, regulation, order, judgment or decree (including federal and state securities laws and regulations) applicable to the Company or by which any property or asset of the Company is bound or affected,
except for such conflicts, defaults, terminations, amendments, acceleration, cancellations and violations as would not, individually or in the aggregate, have a Material Adverse Effect. The Company is not required under federal, state, foreign or
local law, rule or regulation to obtain any consent, authorization or order of, or make any filing or registration with, any court or governmental agency in order for it to execute, deliver or perform any of its obligations under this Agreement or
issue and sell the Shares and the Warrants in accordance with the terms hereof (other than any filings, consents and approvals which may be required to be made by the Company under applicable state and federal securities laws, rules or regulations
prior to or subsequent to the Closing). 

  
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 (e) SEC Documents, Financial Statements. The Common Stock of the Company is registered
pursuant to Section 12(g) of the Exchange Act. During the year preceding this Agreement, the Company has timely filed all reports, schedules, forms, statements and other documents required to be filed by it with the Commission pursuant to the
reporting requirements of the Exchange Act (the foregoing materials, including the exhibits thereto and documents incorporated by reference therein being collectively referred to as the “SEC Documents”). At the times of their
respective filing, all such reports, schedules, forms, statements and other documents complied in all material respects with the requirements of the Exchange Act and the rules and regulations of the Commission promulgated thereunder. At the times of
their respective filings, such reports, schedules, forms, statements and other documents did not contain any untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary in order to make the
statements therein, in light of the circumstances under which they were made, not misleading. As of their respective dates, the financial statements of the Company included in the SEC Documents complied in all material respects with applicable
accounting requirements and the published rules and regulations of the Commission or other applicable rules and regulations with respect thereto. Such financial statements have been prepared in accordance with United States generally accepted
accounting principles applied on a consistent basis (“GAAP”) during the periods involved (except (i) as may be otherwise indicated in such financial statements or the notes thereto or (ii) in the case of unaudited interim
statements, to the extent they may not include footnotes or may be condensed or summary statements), and fairly present in all material respects the consolidated financial position of the Company as of the dates thereof and the results of operations
and cash flows for the periods then ended (subject, in the case of unaudited statements, to normal year-end audit adjustments). 

(f) Accountants. Mayer Hoffman McCann P.C. whose report on the financial statements of the Company is filed with the Commission in the
Company’s Annual Report on Form 10-K for the year ended December 31, 2016, were, at the time such report was issued, independent registered public accountants as required by the Securities Act. 

(g) Internal Controls. The Company has established and maintains a system of internal accounting controls sufficient to provide
reasonable assurances 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 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; and (iv) the recorded
accountability for assets is compared with existing assets at reasonable intervals and appropriate action is taken with respect to any differences. 

(h) Disclosure Controls. The Company has established and maintains disclosure controls and procedures (as such term is defined in Rules 13a-15 and 15d-15 under the Exchange Act). Since the date of the most recent evaluation of such disclosure controls and procedures, there have been no significant changes in
internal controls or in other factors that could significantly affect internal controls, including any corrective actions with regard to significant deficiencies and material weaknesses. The Company is in compliance in all material respects with all
provisions currently in effect and applicable to the Company of the Sarbanes-Oxley Act of 2002, and all rules and regulations promulgated thereunder or implementing the provisions thereof. 

  
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 (i) No Material Adverse Change. Except as disclosed in the SEC Documents, since
June 30, 2017, the Company has not (i) experienced or suffered any Material Adverse Effect, (ii) incurred any material liabilities, obligations, claims or losses (whether liquidated or unliquidated, secured or unsecured, absolute,
accrued, contingent or otherwise) other than those incurred in the ordinary course of the Company’s business or (iii) declared, made or paid any dividend or distribution of any kind on its capital stock. 

(j) No Undisclosed Events or Circumstances. Except as disclosed in the SEC Documents, and except for the consummation of the
transactions contemplated herein, since June 30, 2017, to the Company’s knowledge, no event or circumstance has occurred or exists with respect to the Company or its businesses, properties, prospects, operations or financial condition,
which, under applicable law, rule or regulation, requires public disclosure or announcement by the Company but which has not been so publicly announced or disclosed. 

(k) Litigation. No action, suit, proceeding or investigation is currently pending or, to the knowledge of the Company, has been
threatened in writing against the Company that: (i) concerns or questions the validity of this Agreement; (ii) concerns or questions the right of the Company to enter into this Agreement; or (iii) is reasonably likely to have a
Material Adverse Effect. The Company is neither a party to nor subject to the provisions of any material order, writ, injunction, judgment or decree of any court or government agency or instrumentality. There is no action, suit, proceeding or
investigation by the Company currently pending or that the Company intends to initiate that would have a Material Adverse Effect. 
 (l)
Compliance. Except for defaults or violations which are not reasonably likely to have a Material Adverse Effect, the Company is not (i) in default under or in violation of (and no event has occurred that has not been waived that, with
notice or lapse of time or both, would result in a default by the Company under), nor has the Company received notice of a claim that it is in default under or that it is in violation of, any indenture, loan or credit agreement or any other
agreement or instrument to which it is a party or by which it or any of its properties is bound (whether or not such default or violation has been waived), (ii) is in violation of any order of any court, arbitrator or governmental body, or
(iii) is or has been in violation of any statute, rule or regulation of any governmental authority, including without limitation all foreign, federal, state and local laws, applicable to its business. 

(m) Intellectual Property 

(a) To the best of its knowledge, the Company has entered into agreements with each of its current and former officers, employees and
consultants involved in research and development work, including development of the Company’s products and technology providing the Company, to the extent permitted by law, with title and ownership to patents, patent applications, trade secrets
and inventions conceived, developed, reduced to practice by such person, solely or jointly with other of such persons, during the period of employment by the Company except where the failure to have entered into such an agreement would not have a
Material Adverse Effect. The Company is not aware that any of its employees or consultants is in material violation thereof. 

  
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 (b) To the Company’s knowledge, the Company owns or possesses adequate rights to use all
trademarks, service marks, trade names, domain names, copyrights, patents, patent applications, inventions, know how (including trade secrets and other unpatented and/or unpatentable proprietary or confidential information, systems or procedures),
and other intellectual property rights (“Intellectual Property”) as are necessary for the conduct of its business as described in the SEC Documents. Except as described in the SEC Documents, (i) to the knowledge of the Company,
there is no infringement, misappropriation or violation by third parties of any such Intellectual Property; (ii) there is no pending or, to the knowledge of the Company, threatened action, suit, proceeding or claim by others against the Company
challenging the Company’s rights in or to any such Intellectual Property; (iii) the Intellectual Property owned by the Company and, to the knowledge of the Company, the Intellectual Property licensed to the Company has not been adjudged
invalid or unenforceable by a court of competent jurisdiction or applicable government agency, in whole or in part, and there is no pending or, to the knowledge of the Company, threatened action, suit, proceeding or claim by others challenging the
validity or scope of any such Intellectual Property; (iv) there is no pending or, to the knowledge of the Company, threatened action, suit, proceeding or claim by others against the Company that the Company infringes, misappropriates or
otherwise violates any Intellectual Property or other proprietary rights of others, and the Company has not received any written notice of such claim; and (v) to the Company’s knowledge, no employee of the Company is the subject of any
claim or proceeding involving a violation of any term of any employment contract, patent disclosure agreement, invention assignment agreement, non-competition agreement,
non-solicitation agreement, nondisclosure agreement or any restrictive covenant to or with a former employer where the basis of such violation relates to such employee’s employment with the Company or
actions undertaken by the employee while employed with the Company, in each of (i) through (v), for any instances which would not, individually or in the aggregate, result in a Material Adverse Effect. 

(n) FDA Compliance. 
 (a)
Except as described in the SEC Documents, the Company: (i) is in material compliance with all statutes, rules or regulations applicable to the ownership, testing, development, manufacture, packaging, processing, use, distribution,
marketing, labeling, promotion, sale, offer for sale, storage, import, export or disposal of any product that is under development, manufactured or distributed by the Company (“Applicable Laws”); (ii) has not received any FDA Form
483, notice of adverse finding, warning letter, untitled letter or other correspondence or notice from the U.S. Food and Drug Administration (the “FDA”) or any other federal, state, local or foreign governmental or regulatory
authority alleging or asserting material noncompliance with any Applicable Laws or any licenses, certificates, approvals, clearances, authorizations, permits and supplements or amendments thereto required by any such Applicable Laws
(“Authorizations”), which would not, individually or in the aggregate, result in a Material Adverse Effect; (iii) possesses all material Authorizations necessary for the operation of its business as described in the SEC
Documents and such Authorizations are valid and in full force and effect and the Company is not in material violation of any term of any such Authorizations; and (iv) since January 1, 2017: (A) has not received notice of any claim, action,
suit, proceeding, hearing, enforcement, investigation, arbitration or other action from the FDA or any other federal, state, local or foreign governmental or regulatory authority or third party alleging that any product operation or activity is in
material violation of any Applicable Laws or Authorizations and has no knowledge that the FDA or any other federal, state, local or foreign governmental or regulatory authority or third party is considering any such claim, litigation,

  
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arbitration, action, suit, investigation or proceeding; (B) has not received notice that the FDA or any other federal, state, local or foreign governmental or regulatory authority has taken,
is taking or intends to take action to limit, suspend, modify or revoke any material Authorizations and has no knowledge that the FDA or any other federal, state, local or foreign governmental or regulatory authority is considering such action;
(C) has filed, obtained, maintained or submitted all material reports, documents, forms, notices, applications, records, claims, submissions and supplements or amendments as required by any Applicable Laws or Authorizations and that all such
reports, documents, forms, notices, applications, records, claims, submissions and supplements or amendments were materially complete and correct on the date filed (or were corrected or supplemented by a subsequent submission); and (D) has not,
either voluntarily or involuntarily, initiated, conducted, or issued or caused to be initiated, conducted or issued, any recall, market withdrawal or replacement, safety alert, post-sale warning, “dear doctor” letter, or other notice or
action relating to the alleged lack of safety or efficacy of any product or any alleged product defect or violation and, to the Company’s knowledge, no third party has initiated, conducted or intends to initiate any such notice or action. 

(b) Since January 1, 2017, and except to the extent disclosed in the SEC Documents, the Company has not received any notices or
correspondence from the FDA or any other federal, state, local or foreign governmental or regulatory authority requiring the termination, suspension or material modification of any studies, tests or preclinical or clinical trials conducted by or on
behalf of the Company. 
 (o) General Healthcare Regulatory Compliance. 

(a) As used in this subsection: 

(i) “Governmental Entity” means any national, federal, state, county, municipal, local or foreign government, or any
political subdivision, court, body, agency or regulatory authority thereof, and any Person exercising executive, legislative, judicial, regulatory, taxing or administrative functions of or pertaining to any of the foregoing. 

(ii) “Law” means any federal, state, local, national or foreign law, statute, code, ordinance, rule, regulation, order,
judgment, writ, stipulation, award, injunction, decree or arbitration award or finding. 
 (b) The Company has not committed any act, made
any statement or failed to make any statement that would reasonably be expected to provide a basis for the FDA or any other Governmental Entity to invoke its policy with respect to “Fraud, Untrue Statements of Material Facts, Bribery, and
Illegal Gratuities”, or similar policies, set forth in any applicable Laws. Neither the Company, nor, to the knowledge of the Company, any of its officers, key employees or agents has been convicted of any crime or engaged in any conduct that
has resulted, or would reasonably be expected to result, in debarment under applicable Law, including, without limitation, 21 U.S.C. Section 335a. No claims, actions, proceedings or investigations that would reasonably be expected to result in
such a material debarment or exclusion are pending, or to the knowledge of the Company, threatened, against the Company or any of its respective officers, employees or agents. 

  
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 (c) Each of the Company and, to its knowledge, its directors, officers, employees, and agents
(while acting in such capacity) is, and at all times has been, in material compliance with all health care Laws applicable to the Company or by which any of its properties, businesses, products or other assets is bound or affected, including,
without limitation, the federal Anti-kickback Statute (42 U.S.C. § 1320a-7b(b)), the Anti-Inducement Law (42 U.S.C. § 1320a-7a(a)(5)), the civil False
Claims Act (31 U.S.C. §§ 3729 et seq.), the administrative False Claims Law (42 U.S.C. § 1320a-7b(a)), the Health Insurance Portability and Accountability Act of 1996 (42 U.S.C. § 1320d et
seq.), the exclusion laws (42 U.S.C. § 1320a-7), the Food Drug and Cosmetic Act (21 U.S.C. §§ 301 et seq.) (collectively, “Health Care Laws”). The Company has not received any
notification, correspondence or any other written or oral communication from any Governmental Entity, including, without limitation, the FDA, the Centers for Medicare and Medicaid Services, and the Department of Health and Human Services Office of
Inspector General, of potential or actual material non-compliance by, or liability of, the Company under any Health Care Laws. 

(d) The Company is not a party to any corporate integrity agreements, monitoring agreements, consent decrees, settlement orders, or similar
agreements with or imposed by any Governmental Entity. 
 (p) Application of Takeover Protections. The issuance of the Shares and the
Warrants hereunder and the Purchasers’ ownership thereof is not prohibited by the business combination statutes of the state of Florida. The Company has not adopted any stockholder rights plan, “poison pill” or similar arrangement
that would trigger any right, obligation or event as a result of the issuance of such Shares and Warrants and the Purchasers’ ownership of such Shares and Warrants and there are no similar anti-takeover provisions under the Company’s
charter documents. 
 (q) Listing and Maintenance Requirements. The Company is in compliance with the requirements of the Trading
Market for continued trading of the Common Stock pursuant thereto. The issuance and sale of the Shares and the Warrants hereunder does not contravene the rules and regulations of the Trading Market. 

(r) Private Placement. Neither the Company nor its Affiliates, nor any Person acting on its or their behalf, (i) has engaged in any
form of general solicitation or general advertising (within the meaning of Regulation D under the Securities Act) in connection with the offer or sale of the Shares or the Warrants hereunder, (ii) has, directly or indirectly, made any offers or
sales of any security or solicited any offers to buy any security, under any circumstances that would require registration of the sale and issuance by the Company of the Shares or the Warrants under the Securities Act or (iii) has issued any
shares of Common Stock or shares of any series of preferred stock or other securities or instruments convertible into, exchangeable for or otherwise entitling the holder thereof to acquire shares of Common Stock which would be integrated with the
sale of the Shares or the Warrants to Purchasers for purposes of the Securities Act or of any applicable stockholder approval provisions, including, without limitation, under the rules and regulations of any exchange or automated quotation system on
which any of the securities of the Company are listed or designated, nor will the Company or any of its subsidiaries or affiliates take any action or steps that would require registration of any of the Shares or the Warrants under the Securities Act
or cause the offering of the shares to be integrated with other offerings. Assuming the accuracy of the representations and warranties of Purchasers, the offer and issuance of the Shares and the Warrants by the Company to Purchasers pursuant to this
Agreement will be exempt from the registration requirements of the Securities Act. 

  
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 (s) No Manipulation of Stock. The Company has not taken, and has no plans to take,
in violation of applicable law, any action outside the ordinary course of business designed to, or that might reasonably be expected to, cause or result in unlawful manipulation of the price of the Common Stock. 

(t) Brokers. Other than Dawson James, neither the Company nor any of the officers, directors or employees of the Company has employed
any broker or finder in connection with the transaction contemplated by this Agreement. The Company shall indemnify Purchasers from and against any broker’s, finder’s or agent’s fees for which the Company is responsible. 

(u) Solvency. Based on the financial condition of the Company as of the Closing Date, after giving effect to the receipt by the Company
of the proceeds from the sale of the Shares and the Warrants hereunder, (i) the fair saleable value of the Company’s assets exceeds the amount that will be required to be paid on or in respect of the Company’s existing debts and other
liabilities (including known contingent liabilities) as they mature; (ii) the Company’s assets do not constitute unreasonably small capital to carry on its business as now conducted and as proposed to be conducted including its capital
needs taking into account the particular capital requirements of the business conducted by the Company, and projected capital requirements and capital availability thereof; and (iii) the current cash flow of the Company, together with the
proceeds the Company would receive, were it to liquidate all of its assets, after taking into account all anticipated uses of the cash, would be sufficient to pay all amounts on or in respect of its liabilities when such amounts are required to be
paid. The Company does not intend to incur debts beyond its ability to pay such debts as they mature (taking into account the timing and amounts of cash to be payable on or in respect of its debt). Assuming the Closing occurs, the Company has no
knowledge of any facts or circumstances which lead it to believe that it will file for reorganization or liquidation under the bankruptcy or reorganization laws of any jurisdiction within one year from the Closing Date. 

(v) Foreign Corrupt Practices. Neither the Company, nor to the knowledge of the Company, any agent or other person acting on behalf of
the Company, has (i) directly or indirectly, used any funds for unlawful contributions, gifts, entertainment or other unlawful expenses related to foreign or domestic political activity, (ii) made any unlawful payment to foreign or
domestic government officials or employees or to any foreign or domestic political parties or campaigns from corporate funds, (iii) failed to disclose fully any contribution made by the Company (or made by any person acting on its behalf of
which the Company is aware) which is in violation of law, or (iv) violated in any material respect any provision of the Foreign Corrupt Practices Act of 1977, as amended. 

(w) Voting Agreements. The signatories to the Voting Agreements have voting control with respect to the Company as of the date hereof,
amounting to, in the aggregate, a majority of the issued and outstanding Common Stock. 
 3.2 Representations and Warranties of the
Purchasers. Each Purchaser, for itself and for no other Purchaser, hereby represents and warrants to the Company as follows (as of the Closing Date, unless otherwise noted below): 

  
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 (a) Authority. The execution, delivery and performance by such Purchaser of the
transactions contemplated by this Agreement have been duly authorized by all necessary corporate or similar 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 (i) as limited by general equitable
principles and applicable bankruptcy, insolvency, reorganization, moratorium and other laws of general application affecting enforcement of creditors’ rights generally, (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. 

(b) Own Account. Such Purchaser understands that the Shares are “restricted securities” and have not been registered under the
Securities Act or any applicable state securities law and is acquiring the Shares as principal for its own account and not with a view to or for distributing or reselling such Shares or any part thereof in violation of the Securities Act or any
applicable state securities law, has no present intention of distributing any of such Shares in violation of the Securities Act or any applicable state securities law and has no direct or indirect arrangement or understandings with any other persons
to distribute or regarding the distribution of such Shares (this representation and warranty not limiting such Purchaser’s right to sell the Shares pursuant to the Registration Statement or otherwise in compliance with applicable federal and
state securities laws) in violation of the Securities Act or any applicable state securities law. Such Purchaser is acquiring the Shares hereunder in the ordinary course of its business. Such Purchaser understands that it may not be able to sell any
of the Shares without prior registration under the Securities Act or the existence of an exemption from such registration requirement. 
 (c)
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 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. 
 (d) Purchaser Status. At the time
such Purchaser was offered the Shares, it was, and at the date hereof is, an “accredited investor” as defined in Rule 501 under the Securities Act. Investor is not a registered broker dealer registered under Section 15(a) of the
Exchange Act, or a member of the Financial Industry Regulatory Authority Inc. (“FINRA”), or an entity engaged in the business of being a broker-dealer. 

(e) 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 Shares, 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 Shares and, at the present time, is able to afford a complete loss of such investment. Such Purchaser acknowledges that it has not received any legal or tax advice from the Company or any of its representatives
with respect the transactions contemplated hereby. 

  
 15 

 (f) General Solicitation. Such Purchaser is not purchasing the Shares as a result of any
advertisement, article, notice or other communication regarding the Shares published in any newspaper, magazine or similar media or broadcast over television or radio or presented at any seminar or any other general solicitation or general
advertisement. 
 (g) Access to Information. Such Purchaser acknowledges that it has had the opportunity to review any Company
information and business updates requested by Purchaser 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 Shares and the merits and risks of investing in the Shares and; (ii) access to information about the Company and its 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. 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 Shares. Such Purchaser also
acknowledges that it has had the opportunity to review the terms of the ECC Amendments and the Debt Conversion Agreement. 
 (h) Certain
Trading Activities. As of the date hereof, other than with respect to the transactions contemplated herein, since the time that such Purchaser was first contacted by the Company or any other Person regarding the transactions contemplated hereby,
neither the Purchaser nor any Affiliate of such Purchaser which (x) had knowledge of the transactions contemplated hereby, (y) has or shares discretion relating to such Purchaser’s investments or trading or information concerning such
Purchaser’s investments, including in respect of the Shares, and (z) is subject to such Purchaser’s review or input concerning such Affiliate’s investments or trading (collectively, “Trading Affiliates”) has
directly or indirectly, nor has any Person acting on behalf of or pursuant to any understanding with such Purchaser or Trading Affiliate, effected or agreed to effect any purchases or sales of the securities of the Company (including, without
limitation, any Short Sales involving the Company’s securities). Notwithstanding the foregoing, in the case of a Purchaser and/or Trading Affiliate that is, individually or collectively, a multi-managed investment bank or vehicle whereby
separate portfolio managers manage separate portions of such Purchaser’s or Trading Affiliate’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 or Trading Affiliate’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. Other than to other Persons party to this Agreement, their affiliates and each of their respective professional advisors, such Purchaser maintained the confidentiality of all non-public
information disclosed to it in connection with the transactions contemplated hereby (including the existence and terms of such transactions) at all times prior to the issuance of the Press Release (as defined below). 

(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 Company or any Purchaser for any commission, fee or other compensation pursuant to any agreement, arrangement or understanding entered into by or on behalf of the Purchaser. 

  
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 (j) Independent Investment Decision. Such Purchaser has independently evaluated the merits
of its decision to purchase Shares 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 Shares 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 Shares. 

(k) 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 Shares or the fairness or suitability of the investment in the Shares nor have such authorities passed upon or endorsed the merits of the offering of the Shares. 

(l) Residency. Such Purchaser’s residence (if an individual) or office in which its investment decision with respect to the Shares
was made (if an entity) are located at the address immediately below such Purchaser’s name on its signature page hereto. 
 (m)
Acknowledgment. Each Purchaser acknowledges and agrees that such Purchaser has reviewed and considered prior to entering this Agreement the more detailed information about the Company and the risk factors that may affect the realization of
forward-looking statements set forth in the Company’s filings with the SEC, including its Annual Report on Form 10-K and its Quarterly Reports on Form 10-Q filed
with the SEC. 
 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 III and the Transaction Documents. 

ARTICLE IV 
 OTHER
AGREEMENTS OF THE PARTIES 
 4.1 Transfer Restrictions. 

(a) The Securities may only be disposed of in compliance with state and federal securities laws, including the requirement not to trade in the
Securities while in possession of material non-public information. In connection with any transfer of Shares other than pursuant to an effective registration statement, to the Company or to an Affiliate of a
Purchaser or in connection with a pledge as contemplated in Section 4.1(c), 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 Shares under the Securities Act. As a condition of transfer, any such transferee
shall agree in writing to be bound by the terms of this Agreement and shall have the rights of a Purchaser under this Agreement and the Registration Rights Agreement. 

  
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 (b) The Purchasers agree to the imprinting, so long as is required by this Section 4.1, of a
legend on any of the Securities in the following form: 
 THIS SECURITY HAS NOT BEEN REGISTERED WITH THE SECURITIES AND EXCHANGE COMMISSION
OR THE SECURITIES COMMISSION OF ANY STATE IN RELIANCE UPON AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), AND, ACCORDINGLY, MAY NOT BE OFFERED OR SOLD EXCEPT PURSUANT TO AN
EFFECTIVE REGISTRATION STATEMENT UNDER 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 ACCORDANCE WITH APPLICABLE STATE SECURITIES LAWS AS
EVIDENCED BY A LEGAL OPINION OF COUNSEL TO THE TRANSFEROR TO SUCH EFFECT, THE SUBSTANCE OF WHICH SHALL BE REASONABLY ACCEPTABLE TO THE COMPANY. THIS SECURITY MAY BE PLEDGED IN CONNECTION WITH A BONA FIDE MARGIN ACCOUNT WITH A REGISTERED
BROKER-DEALER OR OTHER LOAN WITH A FINANCIAL INSTITUTION THAT IS AN “ACCREDITED INVESTOR” AS DEFINED IN RULE 501(a) UNDER THE SECURITIES ACT OR OTHER LOAN SECURED BY SUCH SECURITIES. 

(c) The Company acknowledges and agrees that a Purchaser may from time to time pledge pursuant to a bona fide margin agreement with a
registered broker-dealer or grant a security interest in some or all of the Securities to a financial institution that is an “accredited investor” as defined in Rule 501(a) under the Securities Act and who agrees to be bound by the
provisions of this Agreement and the Registration Rights Agreement and, if required under the terms of such arrangement, such Purchaser may transfer pledged or secured Securities to the pledgees or secured parties. Such a pledge or transfer would
not be subject to approval of the Company and no legal opinion of legal counsel of the pledgee, secured party or pledgor shall be required in connection therewith. Further, no notice shall be required of such pledge. At the appropriate
Purchaser’s expense, the Company will execute and deliver such reasonable documentation as a pledgee or secured party of Securities may reasonably request in connection with a pledge or transfer of the Securities, including, if the Underlying
Shares are subject to registration pursuant to the Registration Rights Agreement, the preparation and filing of any required prospectus supplement under Rule 424(b)(3) under the Securities Act or other applicable provision of the Securities Act to
appropriately amend the list of Selling Stockholders thereunder. 

  
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 (d) Certificates evidencing the Underlying Shares shall not contain any legend (including the
legend set forth in Section 4.1(b)), (i) while a registration statement (including the Registration Statement) covering the resale of such Underlying Shares is effective under the Securities Act, or (ii) following any sale of such
Underlying Shares pursuant to Rule 144, or (iii) if such Underlying Shares are eligible for sale under Rule 144, or (iv) if such legend is not required under applicable requirements of the Securities Act (including judicial interpretations
and pronouncements issued by the staff of the Commission). The Company shall cause its counsel to issue a legal opinion to the Transfer Agent promptly after the Effective Date if required by the Transfer Agent to effect the removal of the legend
hereunder. The Company agrees that following the Effective Date or at such time as such legend is no longer required under this Section 4.1(d), it will, no later than three Trading Days following the delivery by a Purchaser to the Company or
the Transfer Agent of a certificate representing Underlying Shares issued with a restrictive legend (such third Trading Day, the “Legend Removal Date”), deliver or cause to be delivered to such Purchaser a certificate representing
such shares that is free from all restrictive and other legends. The Company may not make any notation on its records or give instructions to the Transfer Agent that enlarge the restrictions on transfer set forth in this Section 4.1.
Certificates for Underlying Shares subject to legend removal hereunder shall be transmitted by the Transfer Agent to the Purchasers by crediting the account of the Purchaser’s prime broker with the Depository Trust Company System, if the
Transfer Agent is a participant in the DWAC system, and otherwise by physical delivery of certificates as directed by the Purchaser. 
 (e)
Each Purchaser, severally and not jointly with the other Purchasers, agrees that the removal of the restrictive legend from certificates representing Securities as set forth in this Section 4.1 is predicated upon the Company’s reliance
that the Purchaser will sell any Securities pursuant to either the registration requirements of the Securities Act, including any applicable prospectus delivery requirements, or an exemption therefrom, and that if Securities are sold pursuant to a
Registration Statement, they will be sold in compliance with the plan of distribution set forth therein. 
 4.2 Furnishing of
Information. For a period of one year after the date of this Agreement, the Company covenants 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. During this one-year period, if 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 such information as is required for the Purchasers to sell the Shares and the Warrants under Rule 144. The Company further covenants that it will take such further action as any holder of Shares or
the Warrants may reasonably request, to the extent required from time to time to enable such Person to sell such Shares or Warrants without registration under the Securities Act within the requirements of the exemption provided by Rule 144. 

4.3 Integration. The Company shall not 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 could reasonably be expected to be integrated with the offer or sale of the Shares or the Warrants in a manner that would require the registration under the Securities Act of the sale of the
Shares or the Warrants to the Purchasers or that would be integrated with the offer or sale of the Shares or the Warrants for purposes of the rules and regulations of any Trading Market such that it would require shareholder approval prior to the
closing of such other transaction unless shareholder approval is obtained before the closing of such subsequent transaction. 

  
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 4.4 Securities Laws Disclosure; Publicity. On or before 9:00 a.m., New York City time, on
the Business Day immediately following the date hereof, the Company shall issue a press release (the “Press Release”) reasonably acceptable to the Purchasers disclosing all material terms of the transactions contemplated hereby. On
or before 5:30 p.m., New York City time, on the fourth Trading Day immediately following the execution of this Agreement, the Company will 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, the form of Warrant and the
Registration Rights Agreement)). Notwithstanding the foregoing, the Company shall not publicly disclose the name of any Purchaser or an Affiliate of any Purchaser, or include the name of any Purchaser or an Affiliate of any Purchaser in any press
release or filing with the Commission (other than the Registration Statement) or any regulatory agency or Trading Market, without the prior written consent of such Purchaser, except (i) as required by federal securities law in connection with
(A) any registration statement contemplated by the Registration Rights Agreement and (B) the filing of final Transaction Documents (including signature pages thereto) with the Commission and (ii) to the extent such disclosure is
required by law, request of the Staff of the Commission 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). 

4.5 Indemnification of Purchasers. 

(a) In addition to the indemnity provided in the Registration Rights Agreement, the Company will indemnify and hold each Purchaser and its
directors, officers, stockholders, members, partners, employees 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, stockholders, agents, members, partners 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 person (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 (i) as a result of
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) arising out of, in connection with, or as a result of the execution or delivery of
this Agreement, any other Transaction Document or any agreement or instrument contemplated hereby or thereby, the performance by the parties hereto of their respective obligations hereunder or thereunder or the consummation of the transactions
contemplated hereby or thereby. The Company will not be liable to any Purchaser Party under this Agreement to the extent, but only to the extent that a loss, claim, damage or liability is attributable to any Purchaser Party’s breach of any of
the representations, warranties, covenants or agreements made by such Purchaser Party in this Agreement or in the other Transaction Documents; provided that such a claim for indemnification relating to any breach of any of the representations or
warranties made by the Company in this Agreement is made within one year from the Closing. 
 (b) Promptly after receipt by any Person (the
“Indemnified Person”) of notice of any demand, claim or circumstances which would or might give rise to a claim or the commencement of any action, proceeding or investigation in respect of which indemnity may be

  
 20 

 
sought pursuant to Section 4.5(a), 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; 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 and adversely 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. The Company shall not be liable for any settlement of any proceeding effected without its written consent, which consent shall not be unreasonably withheld,
delayed or conditioned. 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 Party, unless such settlement includes an unconditional release of such Indemnified Person from all liability
arising out of such proceeding, does not admit liability on the part of or attribute fault to any Indemnified Person and contains a provision requiring confidentiality with respect to the facts and circumstances of the dispute and of the existence
and amount of the settlement. 
 4.6 Reservation of Preferred Stock. As of the date hereof, the Company has reserved and the Company
shall continue to reserve and keep available at all times, a sufficient number of shares of Series B Convertible Preferred Stock for the purpose of enabling the Company to issue Shares pursuant to this Agreement. 

4.7 Listing or Quotation of Common Stock. The Common Stock is currently quoted on the NYES-MKT
and is not currently eligible for listing or quotation on any other Trading Market. The Company hereby agrees to use best efforts to maintain the listing or quotation of the Common Stock on a Trading Market, and as soon as reasonably practicable
following the Closing and subject to obtaining the Shareholder Approval (but not later than the earlier of the Effective Date and the first anniversary of the Closing Date) to list all of the Underlying Shares on such Trading Market, as may be
applicable. The Company further agrees, if the Company applies to have the Common Stock traded on any other Trading Market, it will include in such application all of the Underlying Shares, and will take such other action as is necessary to cause
all of the Underlying Shares to be listed on such other Trading Market as promptly as possible. The Company will take all action reasonably necessary to continue the listing and trading of its Common Stock on a Trading Market and will comply in all
respects with the Company’s reporting, filing and other obligations under the bylaws or rules of the Trading Market. 
 4.8 Equal
Treatment of Purchasers. No consideration shall be offered or paid to any Person to amend or consent to a waiver or modification of any provision of any of the Transaction Documents unless the same consideration is also offered to all of the
parties to the Transaction Documents. For clarification purposes, this provision constitutes a separate right granted to each Purchaser by the Company and negotiated separately by each Purchaser, and is

  
 21 

 
intended for the Company to treat the Purchasers as a class 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 Securities or otherwise. 
 4.9 Confidentiality After The Date Hereof. Each Purchaser, severally and not jointly with the
other Purchasers, covenants that until such time as the transactions contemplated by this Agreement and such other material non-public information related to the Company in possession of the Purchaser are
publicly disclosed by the Company as described in Section 4.4, such Purchaser will maintain the confidentiality of all non-public information disclosed to it in connection with the transactions
contemplated hereby (including the existence and terms of such transactions). 
 4.10 Delivery of Shares After Closing. The Company
shall deliver, or cause to be delivered, the respective Shares purchased by each Purchaser to such Purchaser within three Trading Days of the Closing Date (unless such Purchaser has specified to the Company at the time of execution of this Agreement
that it shall settle “delivery versus payment” in which case such Shares shall be delivered on or prior to the Closing Date). 

4.11 Form D; Blue Sky Filings. The Company agrees to timely file a Form D with respect to the Shares and the Warrants as required under
Regulation D and to provide a copy thereof, promptly upon request of any Purchaser. The Company shall take such action as the Company shall reasonably determine is necessary in order to obtain an exemption for, or to qualify the Shares and the
Warrants for, sale to the Purchasers at the Closing under applicable securities or “Blue Sky” laws of the states of the United States, and shall provide evidence of such actions promptly upon request of any Purchaser. 

4.12 Use of Proceeds. The Company intends to use the net proceeds of this offering after payment of the expenses of the offering for the
funding of its AG013 clinical trial and lantibiotics programs and for general corporate purposes, including working capital and shall not use such proceeds for the satisfaction of any portion of the Company’s debt (other than trade payables in
the ordinary course of the Company’s business and prior practices), or to redeem any Common Stock or Common Stock Equivalents. 
 4.13
Termination. Notwithstanding anything herein to the contrary, this Agreement may be terminated at any time by any Purchaser (with respect to the obligations of such Purchaser) or the Company, upon written notice to the other party, if the
Closing shall not have occurred on or before the date that is three months from the date hereof (the “Outside Date”); provided, however, that the right to terminate this Agreement under this Section 4.13 shall not be available
to any party whose (i) breach of any provision of this Agreement, (ii) failure to comply with their obligations under this Agreement or (iii) actions not taken in good faith, shall have been the cause of, or shall have resulted in,
the failure of a Closing to occur on or prior to the Outside Date or the failure of a condition in Section 2.3 to be satisfied at such time. 

4.14 NYSE Required Shareholder Approval. The Company shall take all action necessary to obtain the Shareholder Approval that is required
by the NYSE rules in order to permit the Purchasers to be able to fully convert their respective Shares into Common Stock and to fully exercise their respective Warrants for Common Stock as soon as practicable, which NYSE required Shareholder
Approval shall be obtained no later than ninety (90) days after the Closing Date. Each Purchaser covenants that until such time as the NYSE required Shareholder 

  
 22 

 
Approval is obtained, unless the Common Stock is no longer listed on the NYSE MKT, such Purchaser shall not convert its Shares into Common Stock nor exercise its Warrants for Common Stock to the
extent (but only to the extent) that such conversion or exercise would cause a violation of NYSE listing rules. 
 4.15 Waiver and
Consent. Each Purchaser acknowledges that it understands that the Certificate of Designation and Rights of Series C Non-Convertible Preferred Stock provides that the Series C
Non-Convertible Preferred Stock shall be senior to the Series A Convertible Preferred Stock and Series B Convertible Preferred Stock as to rights upon liquidation, dissolution or winding up of the Company.
Each Purchaser hereby (i) consents to the filing of Certificate of Designation and Rights of Series C Non-Convertible Preferred Stock contained in the Certificate of Designation and the designations
therein (the “Series C Certificate of Designation”) and (ii) solely with respect to the filing of the Series C Certificate of Designation, waives its rights under clause (c) of Section 6 of the Certificate of
Designation and Rights of Series A Convertible Preferred Stock. 
 ARTICLE V 

MISCELLANEOUS 
 5.1
[Reserved]  
 5.2 Fees and Expenses. Except as expressly set forth in the Transaction Documents to the contrary, each party
shall pay the fees and expenses of its advisers, counsel, accountants and other experts, if any, and all other expenses incurred by such party incident to 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 delivery of the Securities to the Purchasers. 

5.3 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 supersede all prior agreements and understandings, oral or written, with respect to such matters, which the parties acknowledge have been merged into such documents, exhibits and schedules.
At or after the Closing, and without further consideration, 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. 
 5.4 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 email to the e-mail address
set forth on the signature pages attached hereto prior to 5:30 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 email to the e-mail address set forth on the signature pages attached hereto on a day that is not a Trading Day or later than 5:30 p.m. (New York City time) on any Trading Day, (c) the 2nd Trading Day following the date of
mailing, if sent by U.S. nationally recognized overnight courier service, or (d) upon actual receipt by the party to whom such notice is required to be given. The address for such notices and communications shall be as set forth on the
signature pages attached hereto. 

  
 23 

 5.5 Amendments; Waivers. No provision of this Agreement may be waived or amended except in
a written instrument signed, in the case of an amendment, by the Company and each Purchaser. 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. 

5.6 Headings and 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. 
 5.7 Successors and Assigns. This Agreement shall be binding upon and inure to the benefit of the parties and
their successors and permitted assigns. The Company may not assign this Agreement or any rights or obligations hereunder without the prior written consent of each Purchaser (other than by merger). Any Purchaser may assign any or all of its rights
under this Agreement to any Person to whom such Purchaser assigns or transfers any Shares or Warrants, provided such transferee agrees in writing to be bound, with respect to the transferred Shares or Warrants, by the provisions of the Transaction
Documents that apply to the “Purchasers.” 
 5.8 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. 

5.9 Governing Law. All questions concerning the construction, validity, enforcement and interpretation of the Transaction Documents
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 legal 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, directors, officers, shareholders, employees or agents) shall be
commenced exclusively in the state and federal courts sitting in the City of New York. Each party hereby irrevocably submits to the exclusive jurisdiction of the state and federal courts sitting in the City of New York, borough of Manhattan 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 suit, action or proceeding, any claim that it is not personally subject to the jurisdiction of any such court, that such suit, action or proceeding is improper or is an inconvenient venue for such proceeding. Each party
hereby irrevocably waives personal service of process and consents to process being served in any such suit, action or 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 other manner permitted by law. 

  
 24 

 5.10 Survival. The representations and warranties contained herein shall survive the
Closing and the delivery of the Shares and the Warrants. 
 5.11 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, such signature shall create a 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. 

5.12 Severability. If any term, provision, covenant or restriction of this Agreement is held by a court of competent jurisdiction to be
invalid, illegal, void or unenforceable, the remainder of the terms, provisions, covenants and restrictions set forth herein shall remain in full force and effect and shall in no way be affected, impaired or invalidated, and the parties hereto shall
use their commercially reasonable efforts to find and employ an alternative means to achieve the same or substantially the same result as that contemplated by such term, provision, covenant or restriction. It is hereby stipulated and declared to be
the intention of the parties that they would have executed the remaining terms, provisions, covenants and restrictions without including any of such that may be hereafter declared invalid, illegal, void or unenforceable. 

5.13 Rescission and Withdrawal Right. Notwithstanding anything to the contrary contained in (and without limiting any similar provisions
of) any of the other Transaction Documents, whenever any Purchaser exercises a right, election, demand or option under a Transaction Document and the Company does not timely and materially 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. 

5.14 Replacement of Shares. If any certificate or instrument evidencing any Shares is mutilated, lost, stolen or destroyed, the Company
shall 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 Shares. If a replacement certificate or instrument evidencing any 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. 
 5.15 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. The parties agree that monetary damages may not be adequate
compensation for any loss incurred by reason of any breach of obligations contained in the Transaction Documents and hereby agrees to waive and not to assert in any action for specific performance of any such obligation the defense that a remedy at
law would be adequate. 

  
 25 

 5.16 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. 
 5.17 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 or non-performance of the obligations of any other Purchaser under any Transaction Document. Nothing contained herein or in any other 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 with respect to such obligations or the
transactions contemplated by 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 their review and negotiation of the
Transaction Documents. 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 the Purchasers. 

5.18 No Promotion. The Company agrees that it will not, and shall cause each of its Subsidiaries to not, without the prior written
consent of a Purchaser, use in advertising, publicity, or otherwise the name of such Purchaser, its affiliates or any of their respective partners or employees, nor any trade name, trademark, trade device, service mark, symbol or any abbreviation,
contraction or simulation thereof owned by such persons. The Company further agrees that it shall obtain the written consent of such Purchaser prior to the Company’s or any of its Subsidiaries’ issuance of any public statement
detailing the purchase of Securities by Purchasers pursuant to this Agreement. 
 5.19 Construction. The parties agree that each of
them and/or their respective counsel has reviewed and had an opportunity to revise the Transaction Documents and, therefore, the normal rule of construction to the effect that any ambiguities are to be resolved against the drafting party shall not
be employed in the interpretation of the Transaction Documents or any amendments hereto. 
 5.20 Exculpation Among Purchasers. Each
Purchaser acknowledges that it is not relying upon any person, firm or corporation (including without limitation any other Purchaser), other than the Company and its officers and directors (acting in their capacity as representatives

  
 26 

 
of the Company), in deciding to invest and in making its investment in the Company. Each Purchaser agrees that no other Purchaser nor the respective controlling persons, officers, directors,
partners, agents or employees of any other Purchaser shall be liable to such Purchaser for any losses incurred by such Purchaser in connection with its investment in the Company. 

5.21 Company Acknowledgement. The Company acknowledges and agrees that (i) each of the Purchasers is participating in the
transactions contemplated by this Agreement and the other Transaction Documents at the Company’s request and the Company has concluded that such participation is in the Company’s best interest and is consistent with the Company’s
objectives and (ii) each of the Purchasers is acting solely in the capacity of an arm’s length purchaser. The Company further acknowledges that no Purchaser is acting or has acted as an advisor, agent or fiduciary of the Company (or in any
similar capacity) with respect to this Agreement or the other Transaction Documents and any advice given by any Purchaser or any of its respective representatives in connection with this Agreement or the other Transaction Documents is merely
incidental to the Purchasers’ purchase of Shares and Warrants. The Company further represents to each Purchaser that the Company’s decision to enter into this Agreement has been based solely on the independent evaluation of the
transactions contemplated hereby by the Company and its representatives. 
 (Signature Pages Follow) 

  
 27 

 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. 
  

							
	ORAGENICS, INC.	  	 Address for Notice:
  

4902 Eisenhower Blvd.
 Suite 125

Tampa, FL 33634

				
	By	 	 /s/ Alan Joslyn

Name: Alan Joslyn
 Title: Chief Executive Officer
	 		  	

 [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK; 

SIGNATURE PAGE FOR PURCHASERS FOLLOW] 

 IN WITNESS WHEREOF, the undersigned have caused this Securities Purchase Agreement to be
duly executed by their respective authorized signatories as of the date first indicated above. 
 Name of Purchaser: MSD Credit Opportunity Master Fund,
L.P. 
 Signature of Authorized Signatory of Purchaser: /s/ Marcello
Liguori                     
 Name of Authorized
Signatory: Marcello Liguori 
 Title of Authorized Signatory: Managing Director 

Email Address of Purchaser: mliguori@msdcapital.com 
 Address
for Notice of Purchaser: 645 Fifth Avenue, 21st Floor 

                        
                      New York, NY 10022 

                        
                      Attn: Marcello Liguori 

Address for Delivery of Shares for Purchaser (if not same as above): 

Total Subscription Amount: $1,275,000.00 
 Shares of Series B
Convertible Preferred Stock: 2,550,000 (convertible into 5,100,000 shares of Common Stock) 
 Warrants:    4,112,903 shares of Common
Stock at $0.31 per share. 

 IN WITNESS WHEREOF, the undersigned have caused this Securities Purchase Agreement to be
duly executed by their respective authorized signatories as of the date first indicated above. 
 Name of Purchaser: HARVEST INTREXON ENTERPRISE FUND I,
L.P. 
 Signature of Authorized Signatory of Purchaser: /s/ Joseph
Jolson                     
 Name of Authorized
Signatory: Joseph Jolson 
 Title of Authorized Signatory: Chief Executive Officer 

Email Address of Purchaser: ________________________________________________ 

Address for Notice of Purchaser: 
 600 Montgomery Street, Suite
1700 
 San Francisco, California 94111 
 Address for Delivery
of Shares for Purchaser (if not same as above): 
 Total Subscription Amount: $1,205,002.50 

Shares of Series B Convertible Preferred Stock: 2,410,005 (convertible into 4,820,010 shares of Common Stock) 

Warrants: 3,887,105 shares of Common Stock at $0.31 per share. 

 IN WITNESS WHEREOF, the undersigned have caused this Securities Purchase Agreement to be
duly executed by their respective authorized signatories as of the date first indicated above. 
 Name of Purchaser: HARVEST INTREXON ENTERPRISE FUND I
(AI), L.P. 
 Signature of Authorized Signatory of Purchaser: /s/ Joseph Jolson
                 
 Name of Authorized Signatory: Joseph Jolson 

Title of Authorized Signatory: Chief Executive Officer 
 Email
Address of Purchaser: ________________________________________________ 
 Address for Notice of Purchaser: 

600 Montgomery Street, Suite 1700 
 San Francisco, California
94111 
 Address for Delivery of Shares for Purchaser (if not same as above): 

Total Subscription Amount: $69,997.50 
 Shares of Series B
Convertible Preferred Stock: 139,995 (convertible into 279,990 shares of Common Stock) 
 Warrants: 225,798 shares of Common Stock at $0.31 per share. 

  

 IN WITNESS WHEREOF, the undersigned have caused this Securities Purchase Agreement to be
duly executed by their respective authorized signatories as of the date first indicated above. 
 Name of Purchaser: KOSKI FAMILY LIMITED PARTNERSHIP 

Signature of Authorized Signatory of Purchaser: /s/ Christine L.
Koski                                        

 Name of Authorized Signatory: Christine L. Koski 
 Title of
Authorized Signatory: Managing General Partner 
 Email Address of Purchaser: clkoski@swbell.net 

Address for Notice of Purchaser: 
 3525 Turtle Creek Blvd, 19B

 Dallas, TX 75219 
 Address for Delivery of Shares for
Purchaser (if not same as above): 
 3525 Turtle Creek Blvd, 19B 

Dallas, TX 75219 
 Total Subscription Amount: $750,000 

Shares of Series B Convertible Preferred Stock: 1,500,000 (convertible into 3,000,000 shares of Common Stock) 

Warrants:    2,419,355 shares of Common Stock at $0.31 per share. 

 Exhibit A 

Certificate of Designation 

 Exhibit B 

Registration Rights Agreement 

 Exhibit C 

Form of Warrant 

 Exhibit D 

Voting Agreement 

 Exhibit E 

Form of Legal opinion of Company Counsel 

Based upon and subject to the foregoing, it is our opinion as of this date that: 

1. Based solely upon the certificate of good standing, dated
[                 , 2017], issued by the State of Florida, the Company is a corporation validly existing and in good standing under the laws of the State of Florida.

 2. The Company has the corporate power and authority to execute, deliver and perform its obligations under the Transaction Documents,
including, without limitation, to issue and deliver the Shares as contemplated by the Agreement. Each of the Transaction Documents has been duly authorized by all necessary corporate action and each has been duly executed and delivered on behalf of
the Company, and each is a legal, valid and binding obligation of the Company enforceable against the Company in accordance with its terms. 

3. The execution and delivery by the Company of the Transaction Documents, and the performance by the Company of its obligations thereunder as
of the date hereof, do not violate the Company’s Articles of Incorporation or Bylaws, do not constitute a default under or a material breach of any material agreement of the Company that has not otherwise been waived and, to our knowledge, do
not (a) violate any U. S. Federal or state statute, rule or regulation applicable to the transactions contemplated by the Transaction Documents or (b) violate any order, writ, judgment, injunction, decree, determination or award which has
been entered against the Company and of which such counsel is aware, except, with respect to clauses (a) and (b), where such violation would not materially and adversely affect the Company. 

4. The Company has the authorized capital stock as set forth in the SEC Documents. The Securities have been duly authorized, and when issued
and sold in accordance with the Securities Purchase Agreement, will be validly issued and non-assessable. 

5. No approval, authorization or other action by, or notice to or filing with, any governmental authority is required in connection with the
execution, delivery and performance by the Company of the Transaction Documents, except (a) those that have been obtained or made and are in full force and effect, and (b) any filings required by Regulation D promulgated under the
Securities Act of 1933, as amended, or by state securities laws. 
 6. To our knowledge, there is no action, proceeding or investigation
pending or overtly threatened against the Company before any court or administrative agency that questions the validity of the Transaction Documents or that could reasonably be expected to result, either individually or in the aggregate, in a
material adverse effect on the Company. 
 7. Assuming the truth and accuracy of the representations made by the Company and the Purchasers
in the Securities Purchase Agreement, the sale and issuance of the Shares in conformity with the terms of the Transaction Documents constitute transactions that are exempt from the registration requirements of the Securities Act of 1933, as amended,
subject to the timely filing of a Form D pursuant to Regulation D. 

 8. The Company is not, after giving effect to the issuance of the Shares, an “investment
company” as defined in the Investment Company Act of 1940, as amended. 
 9. To our knowledge and except as set forth in the SEC
Documents with respect to Intrexon Corporation and the Koski Family Limited Partnership, there are no written contracts, agreements or understandings between the Company and any person granting such person the right (other than rights which have
been waived in writing or otherwise satisfied) to require the Company to include any securities of the Company in any registration statement. 

 Exhibit F 

Series A A&R Certificate of DesignationEX-10.2

 Exhibit 10.2 

AMENDED AND RESTATED REGISTRATION RIGHTS AGREEMENT 

This Registration Rights Agreement (the “Agreement”) is made and entered into as of this 8th day of November, 2017 by and among Oragenics, Inc., a Florida corporation (the “Company”), and each of the several holders of Registrable Securities (as defined below) signatory
hereto (each such holder, a “Holder” and, collectively, the “Holders”). Capitalized terms used herein have the respective meanings ascribed thereto in that certain Securities Purchase Agreement dated
November 8, 2017 by and among the Company and the other parties signatory thereto (the “Purchase Agreement”) unless otherwise defined herein. 

R E C I T A L S 

WHEREAS, the Company issued shares of Series A convertible preferred stock (the “Series A Convertible Preferred
Stock”) and a Common Stock Purchase Warrant to each of MSD Credit Opportunity Master Fund, L.P., Harvest Intrexon Enterprise Fund I, L.P. and Harvest Intrexon Enterprise Fund I (AI), L.P. pursuant to that certain Securities Purchase
Agreement entered into by such parties and the Company on May 10, 2017 (the “May 2017 Purchase Agreement”) and granted certain registration rights pursuant to that certain Registration Rights Agreement dated May 10, 2017
(the “May 2017 Registration Rights Agreement”). 
 WHEREAS, the Company has issued shares of Series B Convertible
Preferred Stock and a Common Stock Purchase Warrant in favor of each Holder, each dated as of the date hereof and acknowledged by such Holder, as such may be amended and supplemented from time to time; and 

WHEREAS, in connection with the consummation of the transactions contemplated by the Purchase Agreement, the parties desire to enter
into this Agreement in order to grant certain registration rights to the Holders as set forth below and to also amend and restate the May 2017 Registration Rights Agreement. 

NOW, THEREFORE, in consideration of the promises, covenants and conditions set forth herein, the parties hereto hereby agree as follows: 

1. Certain Definitions. As used in this Agreement, the following terms shall have the following meanings: 

“Commission” means the U.S. Securities and Exchange Commission. 

“Common Stock” means the Company’s common stock, par value $0.001 per share, and any securities into which such shares
may hereinafter be reclassified. 
 “Conversion Shares” shall mean collectively the shares of Common Stock of the Company
or other Securities issuable upon conversion of the Series A Convertible Preferred Stock and Series B Convertible Preferred Stock. 

 “Exchange Act” means the Securities Exchange Act of 1934, as amended from time
to time, and the rules and regulations promulgated thereunder from time to time in effect . 
 “Initiating Holder” means
any Holder who properly initiates a registration request under this Agreement. 
 “Prospectus” means (i) the
prospectus included in any Registration Statement, as amended or supplemented by any prospectus supplement, with respect to the terms of the offering of any portion of the Registrable Shares covered by such Registration Statement and by all other
amendments and supplements to the prospectus, including post-effective amendments and all material incorporated by reference in such prospectus, and (ii) any “free writing prospectus” as defined in Rule 405 under the Securities Act.

 “Register,” “registered” and “registration” refer to a registration made by preparing
and filing a Registration Statement or similar document in compliance with the Securities Act, and the declaration or ordering of effectiveness of such Registration Statement or document. 

“Registrable Shares” means (i) any shares of Common Stock owned by the Holders, (ii) the Conversion Shares,
(iii) the Warrant Shares, and (iv) any other securities issued or issuable with respect to or in exchange for the Conversion Shares and Warrant Shares, whether by merger, charter amendment or otherwise; provided, that, a security shall not
be a Registrable Share (A) upon sale pursuant to a Registration Statement or Rule 144, or (B) while such security is eligible for sale without restriction by the Holders pursuant to Rule 144, assuming, for purposes of such determination
with respect to each Holder, the full conversion or exercise by such Holder of all convertible securities held by such Holder (disregarding for this purpose any and all limitations of any kind on conversion or exercise of any convertible securities
owned by such Holder). 
 “Registration Statement” means any registration statement of the Company filed under the
Securities Act that covers the resale of any of the Registrable Shares pursuant to the provisions of this Agreement, amendments and supplements to such Registration Statement, including post-effective amendments, all exhibits and all material
incorporated by reference in such Registration Statement. 
 “Required Holders” means the Holders holding at least a
majority of the Conversion Shares and Warrant Shares, considered collectively, then outstanding (disregarding for this purpose any and all limitations of any kind on conversion or exercise of any convertible securities owned by such Holder). 

“Rule 144” means Rule 144 promulgated under the Securities Act or any successor rule thereto. 

“Securities Act” means the Securities Act of 1933, as amended from time to time, and the rules and regulations promulgated
thereunder from time to time in effect . 
 “Warrants” means collectively the Common Stock Purchase Warrants issued to the
Holders pursuant to the Purchase Agreement and the May 2017 Purchase Agreement. 

 “Warrant Shares” shall mean collectively the shares of Common Stock of the
Company issuable upon exercise of the Warrants in accordance with their terms, as such number may be adjusted pursuant to the provisions thereof, and any other Securities to which the holder may become entitled pursuant to the terms of the Warrants.

 2. Registration. 
 (a)
Filing of the Registration Statement. At any time after the date hereof, any Holder may request registration under the Securities Act of the Registrable Shares with respect to at least fifty percent (50%) of such Holder’s Registrable
Securities having an anticipated aggregate offering price, net of Selling Expenses, of at least $1.0 million. Upon receipt of such request, the Company shall (i) within ten (10) days after the date such request is given, give notice
thereof (the “Demand Notice”) to all Holders other than the Initiating Holder, (ii) cause to be prepared and filed with the Commission a Registration Statement on Form S-3 (or, if the
Company is not eligible to use Form S-3, on Form S-1) as soon as practicable and in any event within thirty (30) days of such request (the “Filing
Deadline”) for purposes of registering for sale to the public the Registrable Shares that the Initiating Holders requested to be registered and any additional Registrable Securities requested to be included in such registration by
any other Holders, as specified by notice given by each such Holder to the Company within twenty (20) days of the date the Demand Notice is given, and (iii) use its commercially reasonable efforts to cause such Registration Statement to be
declared effective under the Securities Act by the Commission as soon as practicable thereafter and in any event no later than ninety (90) days after the date of such request. If the Company files the Registration Statement on Form S-1 and subsequently becomes eligible to use Form S-3, the Company shall file a post-effective amendment to such Form S-1 on Form S-3 and use its commercially reasonable efforts to cause the Registration Statement, as so amended, to become effective within thirty (30) days of the filing thereof. Subject to any Commission comments, the
foregoing Registration Statement shall include the plan of distribution attached hereto as Exhibit A; provided, however, that no Holder shall be named as an “underwriter” in such Registration Statement without such Holder’s
prior written consent. If the Registration Statement covering the Registrable Shares is not filed with the Commission on or prior to its Filing Deadline, the Company will make pro rata payments to each Holder that requested that its Registrable
Shares be included on such Registration Statement, as liquidated damages and not as a penalty, in an amount equal to 1.0% of the aggregate amount invested by such Holder pursuant to the Purchase Agreement for each
30-day period or pro rata for any portion thereof following the Filing Deadline for which no Registration Statement is filed with respect to the Registrable Shares. Such payments shall constitute each
Holder’s exclusive monetary remedy for such event, but shall not affect the right of the Holder to seek injunctive relief. Such payments shall be made to each such Holder in cash no later than three (3) Business Days after the end of each 30-day period. 
 (b) Effectiveness. 

(i) Following the declaration of effectiveness by the Commission of the Registration Statement filed pursuant to Section 2(a), the
Company shall (i) use commercially reasonable efforts to cause such Registration Statement to remain effective until such time as there cease to be Registrable Shares, (ii) use commercially reasonable efforts to prepare and file with the
Commission such amendments and supplements to such Registration 

 
Statement and the Prospectus used in connection therewith as may be necessary to keep such Registration Statement effective until such time as there cease to be Registrable Shares,
(iii) furnish to each Holder offering Registrable Shares under such Registration Statement such number of copies of a summary Prospectus or other Prospectus, including a preliminary Prospectus complying with the requirements of the
Securities Act, as such Holder may reasonably request, (iv) comply with the provisions of the Securities Act with respect to the disposition of all Registrable Shares covered by the Registration Statement during such period in accordance with
the intended methods of distribution by the selling holders thereof set forth in the Registration Statement, and (v) prior to any public offering of Registrable Shares, cooperate with the selling holders and the underwriter(s), if any,
in connection with the registration and qualification of the Registrable Shares under the state securities or “blue sky” laws of such jurisdictions within the United States of America as the selling holders or underwriter(s), if any, may
reasonably request and to use commercially reasonable efforts to do any and all other acts or things necessary or advisable to permit the disposition in such jurisdictions of the Registrable Shares covered by the Registration Statement in a manner
that is in compliance with the applicable laws of such jurisdiction or, in the event that the registration does not involve an underwritten public offering, as each such selling holder shall reasonably request. The Company will promptly, and in any
event within one (1) Business Day of having received notice of the following, notify each Holder of (1) any stop order issued or, to the knowledge of the Company, threatened by the Commission and take all commercially reasonable actions to
obtain the withdrawal or lifting of such order if it has been issued or prevent the entry of such stop order if it has not yet been issued; (2) when the Registration Statement or any post-effective amendment thereto has been filed with the
Commission and when the Registration Statement or any post-effective amendment thereto has become effective; (3) any request by the Commission for amendments or supplements to the Registration Statement or the Prospectus included therein or for
additional information; and (4) any notification with respect to the suspension of the qualification of the Registrable Shares included therein for sale in any jurisdiction or the initiation or threatening of any proceeding for such purpose.

 (ii) If after a Registration Statement has been declared effective by the Commission sales cannot be made pursuant to such Registration
Statement for any reason (including without limitation by reason of a stop order, or the Company’s failure to update the Registration Statement), but excluding any Suspension Period or the inability of any Holder to sell the Registrable Shares
covered thereby due to market conditions, then the Company will make pro rata payments to each Holder that requested that its Registrable Shares be included on such Registration Statement, as liquidated damages and not as a penalty, in an amount
equal to 1.0% of the aggregate amount invested by such Holder pursuant to the Purchase Agreement, for each 30-day period or pro rata for any portion thereof following the date by which such Registration
Statement should have been effective and such Holder then held Registrable Shares (the “Blackout Period”). The amounts payable as liquidated damages pursuant to this Section 2(b)(ii) shall be paid monthly within three
(3) Business Days of the last day of each month following the commencement of the Blackout Period until the termination of the Blackout Period. Such payments shall constitute each Holder’s exclusive monetary remedy for such event, but
shall not affect the right of the Holder to seek injunctive relief. Such payments shall be made to each such Holder in cash. 

 (c) Right to Piggyback Registration. 

(i) If at any time following the date of this Agreement that any Registrable Shares remain outstanding the Company proposes for any reason to
register any shares of Common Stock under the Securities Act (other than pursuant to a registration statement on Form S-4 or Form S-8 (or a similar or successor form))
with respect to an offering of Common Stock by the Company for its own account or for the account of any of its stockholders (including, without limitation, Intrexon Corporation or its affiliates (collectively, “Intrexon”)), it
shall at each such time promptly give written notice to the Holders, in accordance with the provisions of Section 5(b) below, of its intention to do so (but in no event less than thirty (30) days before the anticipated filing date) and, to
the extent permitted under the provisions of Rule 415 under the Securities Act, include in such registration all Registrable Shares with respect to which the Company has received written requests for inclusion therein within fifteen (15) days
after receipt of the Company’s notice (a “Piggyback Registration”). Such notice shall offer the Holders the opportunity to register such number of shares of Registrable Shares as each such Holder may request and shall indicate
the intended method of distribution of such Registrable Shares. By written notice delivered to the Company, any Holder (an “Opting-Out Holder”) may elect to waive its right to participate in
Piggyback Registrations (“Registration Opt-Out”), until such time as such written notice is rescinded in writing. During such time as a Registration
Opt-Out is in effect: (x) the Opting-Out Holder shall not receive notices of any proposed Piggyback Registration and (y) shall not be entitled to participate
in any such Piggyback Registration pursuant to this Section 2(c). 
 (ii) Notwithstanding the foregoing, (A) if such registration
involves an underwritten public offering, the Holders must sell their Registrable Shares to, if applicable, the underwriter(s) at the same price and subject to the same underwriting discounts and commissions that apply to the other securities sold
in such offering (it being acknowledged that the Company shall be responsible for other expenses as set forth in Section 3(b)) and subject to the Holders entering into customary underwriting documentation for selling stockholders in an
underwritten public offering, and (B) if, at any time after giving written notice of its intention to register any Registrable Shares pursuant to Section 2(c)(i) and prior to the effective date of the registration statement filed in
connection with such registration, the Company shall determine for any reason not to cause such registration statement to become effective under the Securities Act, the Company shall deliver written notice to the Holders and, thereupon, shall be
relieved of its obligation to register any Registrable Shares in connection with such registration; provided, however, that nothing contained in this Section 2(c)(ii) shall limit the Company’s liabilities and/or obligations under this
Agreement, including, without limitation, the obligation to pay liquidated damages under this Section 2. 
 (d) Underwriting
Requirements. 
 (i) If, at any time after the filing of a registration statement pursuant to Section 2(a), any Holder intends to
distribute at least $15 million of Registrable Shares (including Registrable Shares held by other Holders) by means of an underwriting, then such Holder (the “Requesting Holder”) shall so advise the Company. The underwriter(s)
will be selected by the Requesting Holder, subject only to the reasonable approval of the Company. In such event, the right of any Holder to include such Holder’s Registrable Shares in such 

 
registration shall be conditioned upon such Holder’s participation in such underwriting and the inclusion of such Holder’s Registrable Shares in the underwriting to the extent provided
herein. All Holders proposing to distribute their securities through such underwriting shall (together with the Company as provided in Section 2(d)(iii)) enter into an underwriting agreement in customary form with the underwriter(s) selected
for such underwriting; provided, however, that only the Holders distributing securities through such offering shall be required to sign a lock-up agreement and in no event shall any such lock-up agreement restrict such Holders for a period longer than (i) imposed upon the Company or its officers and directors, (ii) imposed on Intrexon or (iii) ninety (90) days following the effective
date of the Registration Statement. Any discretionary waiver or termination of the lock-up restrictions described above by the Company or the underwriter(s) shall apply pro rata to all Holders subject to such lock-up restrictions and, if Intrexon is distributing securities through such offering, to Intrexon, based on the number of Registrable Shares (or Common Stock owned by Intrexon that would constitute Registrable
Shares if it were owned by a Holder (such Common Stock, “Intrexon Registrable Shares”)) included in such underwriting. Notwithstanding any other provision of this Section 2(d)(i), if the managing underwriter(s) advise(s) the
Requesting Holder in writing that marketing factors require a limitation on the number of shares to be underwritten, then the Requesting Holder shall so advise all Holders that otherwise would be underwritten pursuant hereto, and the number of
Registrable Shares and Intrexon Registrable Shares that may be included in the underwriting shall be allocated among such Holders, including the Requesting Holder, and Intrexon in proportion (as nearly as practicable) to the number of Registrable
Shares and Intrexon Registrable Shares owned by each Holder and Intrexon or in such other proportion as shall mutually be agreed to by all such selling Holders and Intrexon Corporation; provided, however, that the number of Registrable Shares held
by the Holders to be included in such underwriting shall not be reduced unless all other securities (other than Intrexon Registrable Shares) are first entirely excluded from the underwriting. 

(ii) In connection with any offering involving an underwriting of shares of the Company’s capital stock pursuant to Section 2(c),
the Company shall not be required to include any of the Holders’ Registrable Shares in such underwriting unless the Holders accept the terms of the underwriting as agreed upon between the Company and its underwriters, and then only in such
quantity as the underwriters in their sole discretion determine will not jeopardize the success of the offering by the Company; provided, however, that only the Holders distributing securities through such offering shall be required to sign a lock-up agreement and in no event shall any such lock-up agreement restrict such Holders for a period longer than (i) imposed upon the Company or its officers and
directors, (ii) imposed on Intrexon or (iii) ninety (90) days following the effective date of the Registration Statement. Any discretionary waiver or termination of the lock-up restrictions described
above by the Company or the underwriters shall apply pro rata to all Holders subject to such lock-up restrictions and, if Intrexon is distributing securities through such offering, to Intrexon, based on the
number of Registrable Shares and Intrexon Registrable Shares included in such underwriting. If the total number of securities, including Registrable Shares and Intrexon Registrable Shares, requested by stockholders to be included in such offering
exceeds the number of securities to be sold (other than by the Company) that the underwriters in their reasonable discretion determine is compatible with the success of the offering, then the Company shall be required to include in the offering only
that number of such securities, including Registrable Shares and Intrexon Registrable Shares, which the underwriters and the Company in their sole discretion determine 

 
will not jeopardize the success of the offering. If the underwriters determine that less than all of the Registrable Shares and Intrexon Registrable Shares requested to be registered can be
included in such offering, then the Registrable Shares and Intrexon Registrable Shares that are included in such offering shall be allocated among the selling Holders and Intrexon in proportion (as nearly as practicable) to the number of Registrable
Shares and Intrexon Registrable Shares owned by each selling Holder and Intrexon or in such other proportions as shall mutually be agreed to by all such selling Holders and Intrexon Corporation. Notwithstanding the foregoing, in no event shall the
number of Registrable Shares included in the offering be reduced unless all other securities (other than securities to be sold by the Company or Intrexon Registrable Shares) are first entirely excluded from the offering. For purposes of the
provision in this Section 2(d)(ii) concerning apportionment, for any selling Holder that is a partnership, limited liability company, or corporation, the partners, members, retired partners, retired members, stockholders, and Affiliates of such
Holder, or the estates and immediate family members of any such partners, retired partners, members, and retired members and any trusts for the benefit of any of the foregoing Persons, shall be deemed to be a single “selling Holder,” and
any pro rata reduction with respect to such “selling Holder” shall be based upon the aggregate number of Registrable Shares owned by all Persons included in such “selling Holder,” as defined in this sentence. 

(iii) In connection with any offering involving an underwriting of shares of the Company’s capital stock pursuant to Section 2(c),
the Company shall enter into and perform its obligations under an underwriting agreement, in customary form, with the underwriter(s) of such offering and the Company shall comply with all customary requests by such underwriter(s), including, but not
limited to, the delivery of a legal opinion, negative assurance letter and comfort letter, providing due diligence materials as reasonably requested by the underwriter(s) and participating in a road show if requested by the underwriter(s). 

3. Qualifications; Obligations; Restrictions. The obligations of the Company under Section 2 are subject to the following
qualifications: 
 (a) The Company shall not include in any registration, qualification or compliance requested pursuant to Section 2(a)
any other securities (including, without limitation, those to be issued and sold by the Company) without the prior written consent of the Required Holders; provided that Common Stock held by Intrexon as of the date hereof may be included in any such
registration, qualification or compliance without the prior written consent of the Required Holders; 
 (b) the Company shall pay all
expenses incurred in complying with Section 2, including, all registration and filing fees, printing expenses, fees and disbursements of counsel for the Company and reasonable and documented fees and disbursements, not to exceed $15,000, of one
counsel for all of the Holders selected by the Holders of a majority of the Registrable Shares to be included in such registration, expenses of any special audits incident to or required by any such registration and expenses of complying with the
securities or “blue sky” laws of any jurisdictions pursuant to Section 2(b)(i); 
 (c) the Company shall not grant any right
relating to the registration of its securities if the exercise thereof conflicts with or restricts the exercise and enjoyment of any of the rights granted under this Agreement, without the written consent of the Required Holders, which consent may
be given or withheld in the sole discretion of such Holders. The Company will not permit at any time after the date hereof any of its Subsidiaries to grant any right relating to the registration of its securities until the termination of this
Agreement; 

 (d) the Company shall use its best efforts to cause all Registrable Shares covered by a
Registration Statement to be listed on each securities exchange, interdealer quotation system or other market on which similar securities issued by the Company are then listed; and 

(e) the Company shall, with a view to making available to the Holders the benefits of Rule 144 (or its successor rule) and any other rule or
regulation of the Commission that may at any time permit the Holders to sell shares of Common Stock to the public without registration, the Company covenants and agrees to: (i) make and keep public information available, as those terms are
understood and defined in Rule 144, until the earlier of (A) six months after such date as all of the Registrable Shares may be sold without restriction by the holders thereof pursuant to Rule 144 or any other rule of similar effect or
(B) such date as all of the Registrable Shares shall have been resold; (ii) file with the Commission in a timely manner all reports and other documents required of the Company under the Exchange Act; and (iii) furnish to each Holder
upon request, as long as such Holder owns any Registrable Shares, (A) a written statement by the Company that it has complied with the reporting requirements of the Exchange Act, (B) a copy of the Company’s most recent Annual Report
on Form 10-K or Quarterly Report on Form 10-Q, and (C) such other information as may be reasonably requested in order to avail such Holder of any rule or regulation
of the Commission that permits the selling of any such Registrable Shares without registration. 
 4. Obligations of Holders of
Registrable Shares. 
 (a) Subject to the provisions of this Section 4, following the effectiveness of a Registration Statement, the
Company may direct the Holders, in accordance with Section 4(b), to suspend sales of Registrable Shares pursuant to such Registration Statement and the use of any Prospectus or preliminary Prospectus contained therein for the shortest amount of
time as the Company reasonably determines is necessary and advisable (but in no event for more than an aggregate of 60 days in any consecutive 12-month period commencing on the date hereof or more than an
aggregate of 30 days in any consecutive 180-day period (a “Suspension Period”)), if any of the following events shall occur: (1) the majority of the Company’s board of directors
determines in good faith, upon the advice of counsel, that an event has occurred or is continuing as a result of which the Registration Statement or Prospectus contained therein contains an untrue statement of a material fact or omits any fact
necessary to make the statements therein not misleading causing such Registration Statement or the Prospectus contained therein not to be usable for resale of the Registrable Shares during the period required by this Agreement; (2) the majority
of the Company’s board of directors determines in good faith, upon the advice of counsel, that the sale of Registrable Shares pursuant to such Registration Statement would require disclosure of material
non-public information not otherwise required to be disclosed under applicable laws and the Company has a bona fide business purpose for preserving the confidentiality of such information or disclosure of such
information would have a material adverse effect on the Company, in each case under circumstances that would make it impractical or inadvisable to cause the Registration Statement to become effective or to promptly amend or

 
supplement the Registration Statement on a post-effective basis, as applicable; or (3) the majority of the Company’s board of directors determines in good faith, upon the advice of
counsel, that it is required by law, rule or regulation or Commission-published release or interpretation to supplement the Registration Statement or file a post-effective amendment to the Registration Statement in order to incorporate information
into the Registration Statement, including for the purpose of (a) including in the Registration Statement any Prospectus required under Section 10(a)(3) of the Securities Act, (b) reflecting in the Prospectus any facts or events
arising after the effective date of the Registration Statement (or of the most recent post-effective amendment) that, individually or in the aggregate, represents a fundamental change in the information set forth therein, or (c) including in
the Prospectus any material information with respect to the plan of distribution not disclosed in the Registration Statement or any material change to such information (each of the events in clause (1), (2) and (3), a “Suspension
Event”). Upon the occurrence of any such Suspension Event, the Company shall use commercially reasonable efforts to cause the Registration Statement to become effective or to promptly amend or supplement the Registration Statement on a
post-effective basis or to take such action as is necessary to permit the Holders to resume sales of such securities as soon as possible and to promptly make available to each selling Holder any such supplement or amendment. 

(b) Upon the occurrence of a Suspension Event, the Company shall provide to each Holder a notice (a “Suspension Notice”),
which notice shall not include any material non-public information, that a Suspension Event has occurred or is occurring, and each Holder agrees that upon receipt of a Suspension Notice, such Holder will
forthwith discontinue disposition of Registrable Shares pursuant to the Registration Statement until (A) such Holder’s receipt of the copies of the supplemented or amended Prospectus that addresses the reasons for providing the Suspension
Notice, or (B) it is advised in writing by the Company that the use of the Prospectus may be resumed, and has received copies of any additional or supplemental filings that are incorporated by reference in the Prospectus. Each Holder receiving
a Suspension Notice hereby agrees that it will, at such Holder’s election, either (1) destroy any Prospectuses, other than permanent file copies, then in such Holder’s possession that have been replaced by the Company with more
recently dated Prospectuses, or (2) deliver to the Company (at the Company’s expense) all copies, other than permanent file copies then in such Holder’s possession, of the Prospectus covering such Registrable Shares that was current
at the time of receipt of such notice. Notwithstanding anything herein to the contrary, (A) a Holder shall be entitled to inquire of the Company further details regarding the nature of a Suspension Event for which it has been served a
Suspension Notice, and the Company shall use its commercially reasonable efforts to provide any information requested about the Suspension Event to such Holder and (B) the Company shall not serve a Suspension Notice to the Holders, unless,
concurrently therewith, it has suspended sales under all other effective registration statements relating to the resale of the Company’s securities. 

(c) Each Holder, by its acceptance of the Registrable Shares, agrees to cooperate with the Company as reasonably requested by the Company in
connection with the preparation and filing of a Registration Statement hereunder, unless such Holder has notified the Company in writing of its election to exclude all of its Registrable Shares from such Registration Statement. 

 5. Due Diligence Review; Information. 

(a) The Company shall make available, during normal business hours, for inspection and review by the Holders, advisors to and representatives
of the Holders (who may or may not be affiliated with the Holders and who are reasonably acceptable to the Company), and any underwriter(s), all financial and other records, all filings with the Commission, and all other corporate documents and
properties of the Company as may be reasonably necessary for the purpose of such review, and cause the Company’s officers, directors and employees, within a reasonable time period, to supply all such information reasonably requested by the
Holders or any such representative, advisor or underwriter in connection with the Registration Statement (including, without limitation, in response to all questions and other inquiries reasonably made or submitted by any of them), prior to and from
time to time after the filing and effectiveness of each Registration Statement for the sole purpose of enabling the Holders and such representatives, advisors and underwriters and their respective accountants and attorneys to conduct initial and
ongoing due diligence with respect to the Company and the accuracy of the Registration Statement. 
 (b) Notwithstanding anything contained
herein to the contrary, the Company shall not disclose material nonpublic information to the Holders, or to advisors to or representatives of the Holders, unless prior to disclosure of such information the Company identifies such information as
being material nonpublic information and provides the Holders, such advisors and representatives with the opportunity to accept or refuse to accept such material nonpublic information for review and any Holder wishing to obtain such information
enters into an appropriate confidentiality agreement with the Company with respect thereto. 
 6. Indemnification. 

(a) To the extent permitted by law, the Company shall indemnify each Holder, and each person controlling such Holder within the meaning of
Section 15 of the Securities Act, with respect to which any registration that has been effected pursuant to this Agreement, against all claims, losses, damages and liabilities (or action in respect thereof), including any of the foregoing
incurred in settlement of any litigation, commenced or threatened (subject to Section 6(c) below), arising out of or based on any untrue statement (or alleged untrue statement) of a material fact contained in the Registration Statement,
Prospectus, any amendment or supplement thereof or based on any omission (or alleged omission) to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, in light of the circumstances
in which they were made, or any violation by the Company of any rule or regulation promulgated by the Securities Act applicable to the Company and relating to any action or inaction required of the Company in connection with any such registration
and will reimburse each Holder and each person controlling such Holder for reasonable legal and other expenses reasonably incurred in connection with investigating or defending any such claim, loss, damage, liability or action as incurred; provided,
however, that the Company will not be liable in any such case to the extent that any untrue statement or omission or allegation thereof is made in reliance upon and in conformity with written information furnished to the Company by or on behalf of
such Holder expressly for use in preparation of such Registration Statement, Prospectus, or any amendment or supplement thereof; provided further, however, that the Company will not be liable in any such case where the claim, loss, damage or
liability arises out of or is related to the failure of the Holder to comply with the covenants and agreements contained in this Agreement respecting sales of Registrable Shares, and except that the foregoing

 
indemnity agreement is subject to the condition that, insofar as it relates to any such untrue statement or alleged untrue statement or omission or alleged omission made in the preliminary
Prospectus but eliminated or remedied in the amended Prospectus on file with the Commission at the time the Registration Statement becomes effective or in the amended Prospectus filed with the SEC pursuant to Rule 424(b) or in the Prospectus subject
to completion under Rule 434 of the Securities Act, which together meet the requirements of Section 10(a) of the Securities Act (the “Final Prospectus”), such indemnity shall not inure to the benefit of any such Holder or any
such controlling person, if a copy of the Final Prospectus furnished by the Company to the Holder for delivery was not furnished to the person or entity asserting the loss, liability, claim or damage at or prior to the time such furnishing is
required by the Securities Act and the Final Prospectus would have cured the defect giving rise to such loss, liability, claim or damage. 

(b) Each party entitled to indemnification under this Section 6 (the “Indemnified Party”) shall give notice to the party
required to provide indemnification (the “Indemnifying Party”) promptly after such Indemnified Party has actual knowledge of any claim as to which indemnity may be sought, and shall permit the Indemnifying Party (at its expense) to
assume the defense of any such claim or any litigation resulting therefrom, provided, however, that counsel for the Indemnifying Party, who shall conduct the defense of such claim or litigation, shall be approved by the Indemnified Party (whose
approval shall not unreasonably be withheld), and the Indemnified Party may participate in such defense provided that all legal and other expenses incurred by the Indemnified Party in connection therewith shall be at such Indemnified Party’s
expense, and, provided further, that the failure of any Indemnified Party to give notice as provided herein shall not relieve the Indemnifying Party of its obligations under this Agreement, unless such failure is materially prejudicial to the
Indemnifying Party in defending such claim or litigation. An Indemnifying Party shall not be liable for any settlement of an action or claim effected without its written consent (which consent will not be unreasonably withheld). No Indemnifying
Party, in its defense of any such claim or litigation, shall, except with the consent of each Indemnified Party, consent to entry of any judgment or enter into any settlement which does not include as an unconditional term thereof the giving by the
claimant or plaintiff to such Indemnified Party of a release from all liability in respect to such claim or litigation. Notwithstanding the foregoing, the Company shall not, in connection with any one such action or proceeding or separate but
substantially similar or related actions or proceedings in the same jurisdiction arising out of the same general allegations or circumstances, be liable for the reasonable fees and expenses of more than one separate firm of attorneys (in addition to
any local counsel) at any time for indemnified Holders as a group, which firm shall be designated by such Holders. 
 (c) If the
indemnification provided for in this Section 6 is held by a court of competent jurisdiction to be unavailable to an Indemnified Party with respect to any loss, liability, claim, damage or expense referred to therein, then the Indemnifying
Party, in lieu of indemnifying such Indemnified Party thereunder, shall contribute to the amount paid or payable by such Indemnified Party as a result of such loss, liability, claim, damage or expense in such proportion as is appropriate to reflect
the relative fault of the Indemnifying Party on the one hand and of the Indemnified Party on the other in connection with the statements or omissions which resulted in such loss, liability, claim, damage or expense as well as any other relevant
equitable considerations. The relative fault of the Indemnifying Party and of the Indemnified Party shall be determined by reference to, among other things, whether the untrue or alleged untrue 

 
statement of a material fact or the omission or alleged omission to state a material fact relates to information supplied by the Indemnifying Party or by the Indemnified Party and the
parties’ relative intent, knowledge, access to information and opportunity to correct or prevent such statement or omission. 
 7.
Miscellaneous. 
 (a) Amendments and Waivers. This Agreement may be amended only by a writing signed by the Company and the
Required Holders. The Company may take any action herein prohibited, or omit to perform any act herein required to be performed by it, only if the Company shall have obtained the written consent to such amendment, action or omission to act, of the
Required Holders. Notwithstanding the foregoing, this Agreement may not be amended or terminated and the observance of any term hereof may not be waived with respect to any Holder without the written consent of such Holder, unless such amendment,
termination, or waiver applies to all Holders in the same fashion. 
 (b) Notices. All notices and other communications provided for
or permitted hereunder shall be made as set forth in Section 5.4 of the Purchase Agreement. 
 (c) Assignments and Transfers by
Holders. The provisions of this Agreement shall be binding upon and inure to the benefit of the Holders and their respective successors and assigns. A Holder may transfer or assign, in whole or from time to time in part, to one or more persons
its rights hereunder in connection with the transfer of any shares of Series A Convertible Preferred Stock, Series B Convertible Preferred Stock, Warrant or Registrable Shares by such Holder to such person, provided that such Holder complies with
all laws applicable thereto and provides written notice of assignment to the Company promptly after such assignment is effected. Following any such transfer or assignment, such transferee or assignee shall be considered a “Holder” under
this Agreement. 
 (d) Assignments and Transfers by the Company. This Agreement may not be assigned by the Company (whether by
operation of law or otherwise) without the prior written consent of the Holders, provided, however, that in the event that the Company is a party to a merger, consolidation, share exchange or similar business combination transaction in which the
Common Stock is converted into the equity securities of another Person, from and after the effective time of such transaction, such Person shall, by virtue of such transaction, be deemed to have assumed the obligations of the Company hereunder, the
term “Company” shall be deemed to refer to such Person and the term “Registrable Shares” shall be deemed to include the securities received by the Holders in connection with such transaction unless such securities are otherwise
freely tradable by the Holders after giving effect to such transaction. 
 (e) Benefits of the Agreement. The terms and conditions of
this Agreement shall inure to the benefit of and be binding upon the respective permitted successors and assigns of the parties. Nothing in this Agreement, express or implied, is intended to confer upon any party other than the parties hereto or
their respective successors and assigns any rights, remedies, obligations, or liabilities under or by reason of this Agreement, except as expressly provided in this Agreement. 

 (f) Counterparts; Electronic Transmission. This Agreement may be executed in two or more
counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument. This Agreement may also be executed via facsimile or other electronic transmission, which shall be deemed an original.

 (g) Titles and Subtitles. The titles and subtitles used in this Agreement are used for convenience only and are not to be
considered in construing or interpreting this Agreement. 
 (h) Severability. Any provision of this Agreement that is prohibited or
unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective to the extent of such prohibition or unenforceability without invalidating the remaining provisions hereof but shall be interpreted as if it were written so as to be
enforceable to the maximum extent permitted by applicable law, and any such prohibition or unenforceability in any jurisdiction shall not invalidate or render unenforceable such provision in any other jurisdiction. To the extent permitted by
applicable law, the parties hereby waive any provision of law which renders any provisions hereof prohibited or unenforceable in any respect. 

(i) Further Assurances. The parties shall execute and deliver all such further instruments and documents and take all such other actions
as may reasonably be required to carry out the transactions contemplated hereby and to evidence the fulfillment of the agreements herein contained. 

(j) Entire Agreement. This Agreement is intended by the parties as a final expression of their agreement and intended to be a complete
and exclusive statement of the agreement and understanding of the parties hereto in respect of the subject matter contained herein. This Agreement supersedes the May 2017 Registration Rights Agreement and all prior agreements and understandings
between the parties with respect to such subject matter. If any provision of this Agreement is found to conflict with the Purchase Agreement, the provisions of this Agreement shall prevail. 

(k) Governing Law. THIS AGREEMENT SHALL BE CONSTRUED AND ENFORCED IN ACCORDANCE WITH, AND THE RIGHTS OF THE PARTIES SHALL BE GOVERNED
BY, THE INTERNAL LAW OF THE STATE OF NEW YORK, EXCLUDING CHOICE-OF-LAW PRINCIPLES OF THE LAW OF SUCH STATE THAT WOULD PERMIT THE APPLICATION OF THE LAWS OF A
JURISDICTION OTHER THAN SUCH STATE. 
 (l) Personal Jurisdiction. 

(i) The Company irrevocably submits to the non-exclusive jurisdiction of any New York State or federal
court sitting in the Borough of Manhattan. The City of New York, over any suit, action or proceeding arising out of or relating to this Agreement or any of the agreements, documents or instruments delivered in connection herewith or therewith. To
the fullest extent permitted by applicable law, the Company irrevocably waives and agrees not to assert, by way of motion, as a defense or otherwise, any claim that it is not subject to the jurisdiction of any such court, any objection that it may
now or hereafter have to the laying of the venue of any such suit, action or proceeding brought in any such court and any claim that any such suit, action or proceeding brought in any such court has been brought in an inconvenient forum. 

 (ii) Nothing in this Section 7(l) shall affect the right of the Holders to serve process in
any manner permitted by law, or limit any right that the Holders may have to bring proceedings against the Company in the courts of any appropriate jurisdiction or to enforce in any lawful manner a judgment obtained in one jurisdiction in any other
jurisdiction. 
 (m) WAIVER OF JURY TRIAL. THE COMPANY AND EACH OF THE PURCHASERS EACH IRREVOCABLY WAIVES ALL RIGHT TO TRIAL BY JURY
IN ANY ACTION, PROCEEDING OR COUNTERCLAIM (WHETHER BASED ON CONTRACT, TORT OR OTHERWISE) ARISING OUT OF OR RELATING TO THIS AGREEMENT OR ANY OTHER AGREEMENT, DOCUMENT OR INSTRUMENT DELIVERED IN CONNECTION HEREWITH OR THEREWITH OR THE ACTIONS OF THE
PURCHASERS IN THE NEGOTIATION, ADMINISTRATION, PERFORMANCE OR ENFORCEMENT HEREOF OR THEREOF. 
 (n) No Inconsistent Agreements.
Neither the Company nor any of its subsidiaries has entered, as of the date hereof, nor shall the Company or any of its subsidiaries, on or after the date of this Agreement, enter into any agreement with respect to its securities, that would have
the effect of impairing the rights granted to the Holders in this Agreement or otherwise conflicts with the provisions hereof. Except as set forth in the Company’s filings with the Commission, neither the Company nor any of its subsidiaries has
previously entered into any agreement granting any registration rights with respect to any of its securities to any Person that have not been satisfied in full. 

(o) Independent Nature of Holders’ Obligations and Rights. The obligations of each Holder hereunder are several and not joint with
the obligations of any other Holder hereunder, and no Holder shall be responsible in any way for the performance of the obligations of any other Holder hereunder. Nothing contained herein or in any other agreement or document delivered at any
closing, and no action taken by any Holder pursuant hereto or thereto, shall be deemed to constitute the Holders as a partnership, an association, a joint venture or any other kind of group or entity, or create a presumption that the Holders are in
any way acting in concert or as a group or entity with respect to such obligations or the transactions contemplated by this Agreement or any other matters, and the Company acknowledges that the Holders are not acting in concert or as a group, and
the Company shall not assert any such claim, with respect to such obligations or transactions. Each Holder shall be entitled to protect and enforce its rights, including without limitation the rights arising out of this Agreement, and it shall not
be necessary for any other Holder to be joined as an additional party in any proceeding for such purpose. The use of a single agreement with respect to the obligations of the Company contained was solely in the control of the Company, not the action
or decision of any Holder, and was done solely for the convenience of the Company and not because it was required or requested to do so by any Holder. It is expressly understood and agreed that each provision contained in this Agreement is between
the Company and a Holder, solely, and not between the Company and the Holders collectively and not between and among Holders. 

[Remainder of Page Intentionally Left Blank] 

 IN WITNESS WHEREOF, the parties have executed this Agreement or caused their duly authorized
officers to execute this Agreement as of the date first above written. 
  

					
	The Company:	 		 	ORAGENICS, INC.
			
		 	        	 	By: /s/ Alan
Joslyn                                        
            
		 		 	Name: Alan Joslyn
		 		 	Title: Chief Executive Officer

					
	The Holders:	 		 	MSD Credit Opportunity Master Fund, L.P.
			
		 		 	 /s/ Marecello Liguori

		 		 	Marcello Liguori, Managing Director

 [Holder signature page to Registration Rights Agreement] 

					
	The Holders:	 		 	HARVEST INTREXON ENTERPRISE FUND I, L.P.
		 		 	 By: HARVEST ENTERPRISE GP I, LLC
 its general
partner

		 		 	         By: HARVEST CAPITAL STRATEGIES, LLC

        its managing member

			
		 		 	By: /s/ Joseph
Jolson                                        
        
		 		 	Name: Joseph Jolson
		 		 	Title: Chief Executive Officer
			
		 		 	HARVEST INTREXON ENTERPRISE FUND I (AI), L.P.
		 		 	 By: HARVEST ENTERPRISE GP I, LLC
 its general
partner

		 		 	         By: HARVEST CAPITAL STRATEGIES, LLC,

        its managing member

			
		 		 	By: /s/ Joseph
Jolson                                        
        
		 		 	Name: Joseph Jolson
		 		 	Title: Chief Executive Officer
			
		 		 	Address:         600 Montgomery Street, Suite 1700
		 		 	                        San Francisco, California 94111

					
	The Holders:	 		 	KOSKI FAMILY LIMITED PARTERSHIP
			
		 		 	By: /s/ Christine L.
Koski                                        
        
		 		 	Name: Christine L. Koski
		 		 	Title: Managing General Partner

 Exhibit A 

Plan of Distribution 
 The
selling stockholders, which as used herein includes donees, pledgees, transferees or other successors-in-interest selling shares of common stock or interests in shares
of common stock received after the date of this prospectus from a selling stockholder as a gift, pledge, partnership distribution or other transfer, may, from time to time, sell, transfer or otherwise dispose of any or all of their shares of common
stock or interests in shares of common stock on any stock exchange, market or trading facility on which the shares are traded or in private transactions. These dispositions may be at fixed prices, at prevailing market prices at the time of sale, at
prices related to the prevailing market price, at varying prices determined at the time of sale, or at negotiated prices. 
 The selling
stockholders may use any one or more of the following methods when disposing of shares or interests therein: 
  

	 	•	 	ordinary brokerage transactions and transactions in which the broker-dealer solicits purchasers; 

  

	 	•	 	block trades in which the broker-dealer will attempt to sell the shares as agent, but may position and resell a portion of the block as principal to facilitate the transaction; 

 

	 	•	 	purchases by a broker-dealer as principal and resale by the broker-dealer for its account; 

  

	 	•	 	an exchange distribution in accordance with the rules of the applicable exchange; 

  

	 	•	 	privately negotiated transactions; 

  

	 	•	 	short sales effected after the date the registration statement of which this Prospectus is a part is declared effective by the Commission; 

 

	 	•	 	through the writing or settlement of options or other hedging transactions, whether through an options exchange or otherwise; 

  

	 	•	 	broker-dealers may agree with the selling stockholders to sell a specified number of such shares at a stipulated price per share; 

  

	 	•	 	a combination of any such methods of sale; and 

  

	 	•	 	any other method permitted by applicable law. 

 The selling stockholders may, from time to
time, pledge or grant a security interest in some or all of the shares of common stock owned by them and, if they default in the performance of their secured obligations, the pledgees or secured parties may offer and sell the shares of common stock,
from time to time, under this prospectus, or under an amendment to this 

 
prospectus under Rule 424(b)(3) or other applicable provision of the Securities Act amending the list of selling stockholders to include the pledgee, transferee or other successors in interest as
selling stockholders under this prospectus. The selling stockholders also may transfer the shares of common stock in other circumstances, in which case the transferees, pledgees or other successors in interest will be the selling beneficial owners
for purposes of this prospectus. 
 In connection with the sale of our common stock or interests therein, the selling stockholders may enter
into hedging transactions with broker-dealers or other financial institutions, which may in turn engage in short sales of the common stock in the course of hedging the positions they assume. The selling stockholders may also sell shares of our
common stock short and deliver these securities to close out their short positions, or loan or pledge the common stock to broker-dealers that in turn may sell these securities. The selling stockholders may also enter into option or other
transactions with broker-dealers or other financial institutions or the creation of one or more derivative securities which require the delivery to such broker-dealer or other financial institution of shares offered by this prospectus, which shares
such broker-dealer or other financial institution may resell pursuant to this prospectus (as supplemented or amended to reflect such transaction). 

The aggregate proceeds to the selling stockholders from the sale of the common stock offered by them will be the purchase price of the common
stock less discounts or commissions, if any. Each of the selling stockholders reserves the right to accept and, together with their agents from time to time, to reject, in whole or in part, any proposed purchase of common stock to be made directly
or through agents. We will not receive any of the proceeds from this offering. Upon any exercise of the warrants by payment of cash, however, we will receive the exercise price of the warrants. 

The selling stockholders also may resell all or a portion of the shares in open market transactions in reliance upon Rule 144 under the
Securities Act of 1933, provided that they meet the criteria and conform to the requirements of that rule. 
 The selling stockholders and
any underwriters, broker-dealers or agents that participate in the sale of the common stock or interests therein may be “underwriters” within the meaning of Section 2(11) of the Securities Act. Any discounts, commissions, concessions
or profit they earn on any resale of the shares may be underwriting discounts and commissions under the Securities Act. Selling stockholders who are “underwriters” within the meaning of Section 2(11) of the Securities Act will be
subject to the prospectus delivery requirements of the Securities Act. 
 To the extent required, the shares of our common stock to be sold,
the names of the selling stockholders, the respective purchase prices and public offering prices, the names of any agents, dealer or underwriter, any applicable commissions or discounts with respect to a particular offer will be set forth in an
accompanying prospectus supplement or, if appropriate, a post-effective amendment to the registration statement that includes this prospectus. 

In order to comply with the securities laws of some states, if applicable, the common stock may be sold in these jurisdictions only through
registered or licensed brokers or dealers. In addition, in some states the common stock may not be sold unless it has been registered or qualified for sale or an exemption from registration or qualification requirements is available and is complied
with. 

 We have advised the selling stockholders that the anti-manipulation rules of Regulation M under
the Exchange Act may apply to sales of shares in the market and to the activities of the selling stockholders and their affiliates. In addition, to the extent applicable we will make copies of this prospectus (as it may be supplemented or amended
from time to time) available to the selling stockholders for the purpose of satisfying the prospectus delivery requirements of the Securities Act. The selling stockholders may indemnify any broker-dealer that participates in transactions involving
the sale of the shares against certain liabilities, including liabilities arising under the Securities Act. 
 We have agreed to indemnify
the selling stockholders against liabilities, including liabilities under the Securities Act and state securities laws, relating to the registration of the shares offered by this prospectus. 

We have agreed with the selling stockholders to keep the registration statement of which this prospectus constitutes a part effective until
the earlier of (1) such time as all of the shares covered by this prospectus have been disposed of pursuant to and in accordance with the registration statement or (2) the date on which all of the shares may be sold without restriction
pursuant to Rule 144 of the Securities Act.

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