Exhibit 10.17

BRICKELL BIOTECH, INC.

REGISTRATION RIGHTS AGREEMENT

This Registration Rights Agreement (this “Agreement”) is made and entered into as of August 31, 2019, between Brickell Biotech, Inc., a Delaware corporation (formerly known as Vical Incorporated) (the “Company”), and NovaQuest Co-Investment Fund X (the “Purchaser”).

This Agreement is made pursuant to the Funding Agreement, effective as of June 2, 2019, between Brickell Subsidiary, Inc., a Delaware corporation (formerly known as Brickell Biotech, Inc.) (“Brickell Bio”), and the Purchaser (the “Funding Agreement”).

Brickell Bio, the Company, and Victory Subsidiary (the “Merger Parties”) entered into an Agreement and Plan of Merger and Reorganization (the “Merger Agreement”), effective June 2, 2019, whereby the Merger Parties determined that it is in each of their best interests that the Purchaser be granted registration rights by the Company as laid out herein and in order to execute certain key parts of the Funding Agreement from which the Company benefits.

WHEREAS, in consideration of the entry into the Funding Agreement and pursuant to the terms of the Funding Agreement, and as a consequence of the Merger Agreement, the Company is obligated to issue to the Purchaser a Common Stock Purchase Warrant in the form attached as Exhibit B to the Funding Agreement (the “Warrant”).

NOW, THEREFORE, in consideration of the mutual covenants contained in this Agreement, from the Merger Agreement, and through the Funding Agreement, and for other good and valuable consideration, the receipt and adequacy of which are hereby acknowledged, the Company and the Purchaser agree as follows:

1.    Definitions. Capitalized terms used and not otherwise defined herein that are defined in the Funding and Merger Agreements shall have the meanings given such terms in the Funding and Merger Agreements. As used in this Agreement, the following terms shall have the following meanings and shall supersede any other identical term defined in either the Funding or the Merger Agreement(s):

“Advice” shall have the meaning set forth in Section 6(h) herein.

“Affiliate” means, with respect to any Person, any other Person that directly or indirectly controls, is controlled by, or is under common control with, such Person.

“Agreement” shall have the meaning set forth in the Preamble.

“Allowable Grace Period” shall have the meaning set forth in Section 3(d) of this Agreement.

“Business Day” means a day other than a Saturday or Sunday or other day on which banks located in New York City are authorized or required by law to close.

“Capital Stock” means, with respect to any Person at any time, any and all shares, interests, participations or other equivalents (however designated, whether voting or non-voting) of capital stock, securities convertible into or exchangeable or exercisable for any of its shares, interests, participations or other equivalents, partnership interests (whether general or limited), limited liability company interests, or equivalent ownership interests in or issued by such Person.

“Commission” means the United States Securities and Exchange Commission.

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“Common Stock” means the voting common stock of the Company, par value $0.01 per share, and any securities into which such shares of voting common stock may hereafter be reclassified.

“Company” shall have the meaning set forth in the Preamble.

“Effective Date” means the date that the Registration Statement filed pursuant to Section 2(a) of this Agreement is first declared effective by the Commission. This is not the effective date of this Agreement, which shall be the date last signed by the parties.

“Effectiveness Deadline” means, with respect to the Initial Registration Statement or the New Registration Statement, the date that is seventy-five (75) calendar days after the Filing Deadline.

“Effectiveness Period” shall have the meaning set forth in Section 2(b) herein.

“Event” shall have the meaning set forth in Section 2(c) herein.

“Event Date” shall have the meaning set forth in Section 2(c) herein.

“Exchange Act” means the U.S. Securities Exchange Act of 1934, as amended, and the rules and regulations promulgated thereunder.

“Filing Deadline” means, with respect to the Initial Registration Statement required to be filed pursuant to Section 2(a) herein, the date that is thirty (30) calendar days after the Warrant is issued, provided, that if the Filing Deadline falls on a Saturday, Sunday or other day that the Commission is closed for business, the Filing Deadline shall be extended to the next business day on which the Commission is open for business.

“FINRA” shall have the meaning set forth in Section 3(k) herein.

“Funding Agreement” shall have the meaning set forth in the Preamble.

“Grace Period” shall have the meaning set forth in Section 3(d) herein.

“Holder” or “Holders” means the holder or holders, as the case may be, from time to time of Registrable Securities.

“Holders Counsel” shall have the meaning set forth in Section 3(a) herein.

“Indemnified Party” shall have the meaning set forth in Section 5(c) herein.

“Indemnifying Party” shall have the meaning set forth in Section 5(c) herein.

“Initial Registration Statement” means shall have the meaning set forth in Section 2(a) herein.

“Liquidated Damages” shall have the meaning set forth in Section 2(c) herein.

“Losses” shall have the meaning set forth in Section 5(a) herein.

“Merger Agreement” shall have the meaning set forth in the Preamble.

“New Registration Statement” shall have the meaning set forth in Section 2(a) herein.

“Non-Responsive Holder” shall have the meaning set forth in Section 6(d) herein.

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“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.

“Principal Market” means the Trading Market on which the Common Stock is primarily listed on and quoted for trading.

“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.

“Prospectus” means the prospectus included in a Registration Statement (including, without limitation, a prospectus that includes any information previously omitted from a prospectus filed as part of an effective registration statement in reliance upon Rule 430A promulgated under the Securities Act), as amended or supplemented by any prospectus supplement, with respect to the terms of the offering of any portion of the Registrable Securities covered by a Registration Statement, and all other amendments and supplements to the Prospectus, including post-effective amendments, and all material incorporated by reference or deemed to be incorporated by reference in such Prospectus.

“Purchaser” shall have the meaning set forth in the Preamble.

“Registrable Securities” means all of the Shares and any securities issued or issuable upon any stock split, dividend or other distribution, recapitalization or similar event with respect to the Shares, provided that Shares shall cease to be Registrable Securities upon the earliest to occur of the following: (A) a sale pursuant to a Registration Statement; (B) becoming eligible for sale without time, volume or manner of sale restrictions by the Holder thereof under Rule 144; or (C) if such Shares have ceased to be outstanding.

“Registration Statements” means any one or more registration statements of the Company filed under the Securities Act that covers the resale of any of the Registrable Securities pursuant to the provisions of this Agreement (including without limitation the Initial Registration Statement, the New Registration Statement and any Remainder Registration Statements), amendments and supplements to such Registration Statements, including post-effective amendments, all exhibits and all material incorporated by reference or deemed to be incorporated by reference in such Registration Statements.

“Remainder Registration Statement” shall have the meaning set forth in Section 2(a) herein.

“Requested Information” shall have the meaning set forth in Section 6(d) herein.

“Required Registration Statement” means any Initial Registration Statement, New Registration Statement or Remainder Registration Statement.

“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 successor rule thereto.

“Rule 415” means Rule 415 promulgated by the Commission pursuant to the Securities Act, as such Rule may be amended from time to time, or any successor rule thereto.

“Rule 424” means Rule 424 promulgated by the Commission pursuant to the Securities Act, as such Rule may be amended from time to time, or any successor rule thereto.

“SEC Guidance” means (i) any publicly-available written guidance, policy statement, comments, requirements, or requests of the Commission staff and/or (ii) the Securities Act.

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“Securities Act” means the Securities Act of 1933, as amended, and the rules and regulations promulgated thereunder.

“Shares” means the shares of Common Stock issued or issuable to the Purchaser pursuant to the Warrant.

“Trading Day” means (i) a day on which the Common Stock is listed or quoted and traded on its Principal Market (other than the OTC Bulletin Board), or (ii) if the Common Stock is not listed on a Trading Market (other than the OTC Bulletin Board), a day on which the Common Stock is traded in the over-the-counter market, as reported by the OTC Bulletin Board, or (iii) if the Common Stock is not quoted on any Trading Market, a day on which the Common Stock is quoted in the over-the-counter market as reported in the “pink sheets” by OTC Markets Group, Inc. (or any similar organization or agency succeeding to its functions of reporting prices); provided, that in the event that the Common Stock is not listed or quoted as set forth in (i), (ii) and (iii) hereof, then Trading Day shall mean a Business Day.

“Trading Market” means whichever of the New York Stock Exchange, the NYSE American LLC, the NASDAQ Global Select Market, the NASDAQ Global Market, the NASDAQ Capital Market, or OTC Bulletin Board on which the Common Stock is listed or quoted for trading on the date in question.

“Warrant” shall have the meaning set forth in the Preamble.

2.    Mandatory Registration.

(a)    On or prior to the Filing Deadline, the Company shall prepare and file with the Commission a Registration Statement covering the resale of all of the Registrable Securities not already covered by an existing and effective Registration Statement for an offering to be made on a continuous basis pursuant to Rule 415 or, if Rule 415 is not available for offers and sales of the Registrable Securities, by such other means of distribution of Registrable Securities as the Company may reasonably determine (the “Initial Registration Statement”). Notwithstanding the registration obligations set forth in this Section 2 of the Agreement, in the event that (i) the Company’s legal counsel determines that all such Registrable Securities cannot, as a result of the application of Rule 415, be registered for resale as a secondary offering on a single registration statement prior to filing the Initial Registration Statement, or (ii) the Commission informs the Company that all such Registrable Securities cannot, as a result of the application of Rule 415, be registered for resale as a secondary offering on a single registration statement, the Company agrees promptly to (A) inform each of the Holders thereof and, as applicable, file the Initial Registration Statement, or use its reasonable efforts to file amendments to the Initial Registration Statement as required by the Commission and/or (B) withdraw the Initial Registration Statement and file a new registration statement (a “New Registration Statement”), in each case covering the maximum number of such Registrable Securities permitted to be registered thereon, on the Commission’s Form S-3 or, if Form S-3 is not available for such purpose, on such form available to the Company to register for resale the Registrable Securities as a secondary offering. Notwithstanding any other provision of this Agreement, if the opinion of the Company’s legal counsel or any SEC Guidance sets forth a limitation of the number of Registrable Securities permitted to be registered on a particular Registration Statement as a secondary offering, the number of Registrable Securities to be registered on such Registration Statement will be reduced pro rata on the basis of the aggregate number of Registrable Securities owned by each applicable Holder. In the event the Company amends the Initial Registration Statement or files a New Registration Statement, as the case may be, under clauses (A) or (B) above, the Company will use its reasonable efforts to file with the Commission, as promptly as allowed by Commission or SEC Guidance provided to the Company or to registrants of securities in general, one or

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more registration statements on such form available to the Company to register for resale those Registrable Securities that were not registered for resale on the Initial Registration Statement, as amended, or the New Registration Statement (the “Remainder Registration Statements”). No Holder shall be named as an “underwriter” in any Registration Statement without such Holder’s prior written consent.

(b)    The Company shall use its reasonable efforts to cause each Required Registration Statement to be declared effective by the Commission as soon as practicable, and, with respect to the Initial Registration Statement or the New Registration Statement, as applicable, no later than the Effectiveness Deadline, and shall use its reasonable efforts to keep each Required Registration Statement continuously effective under the Securities Act (excluding during an Allowable Grace Period) until the earlier of (i) such time as all of the Registrable Securities covered by such Required Registration Statement have been sold publicly by the Holders or (ii) the date that all Registrable Securities covered by such Required Registration Statement may be sold by the Holders without volume or manner of sale restrictions under Rule 144, as determined by counsel to the Company pursuant to a written opinion letter to such effect, addressed and reasonably acceptable to the Company’s transfer agent (the “Effectiveness Period”). The Company promptly shall notify the Holders via facsimile or electronic mail of a “.pdf” format data file of the effectiveness of a Registration Statement within one (1) Business Day of the Effective Date. The Company shall file a final Prospectus for a Required Registration Statement with the Commission, as required by Rule 424(b) as promptly as reasonably practicable following the Effective Date.

(c)    If: (i) the Initial Registration Statement is not filed with the Commission on or prior to the Filing Deadline, (ii) the Initial Registration Statement or the New Registration Statement, as applicable, is not declared effective by the Commission (or otherwise does not become effective) for any reason on or prior to the Effectiveness Deadline, or (iii) after its Effective Date, (A) such Registration Statement ceases to be effective for any reason (including without limitation by reason of a stop order, or the Company’s failure to update the Registration Statement), to remain continuously effective as to all Registrable Securities for which it is required to be effective, or (B) the Holders are not permitted to utilize the Prospectus therein to resell such Registered Securities (other than during an Allowable Grace Period), or (iv) a Grace Period applicable to a Required Registration Statement exceeds the length of an Allowable Grace Period (any such failure or breach in clauses (i) through (iv) above being referred to as an “Event,” and, for purposes of clauses (i), (ii) or (iii), the date on which such Event occurs, or for purposes of clause (iv) the date on which such Allowable Grace Period is exceeded, being referred to as an “Event Date”), then in addition to any other rights the Holders may have hereunder or under applicable law, on each such Event Date and on each monthly anniversary of each such Event Date (if the applicable Event shall not have been cured by such date) until the applicable Event is cured, the Company shall pay to each Holder, pro rata on the basis of the aggregate number of Registrable Securities owned by each applicable Holder, an amount in cash, as liquidated damages and not as a penalty (“Liquidated Damages”), an amount equal to $500.00 per day on which the Company is not in compliance with the Filing Deadline, the Effectiveness Deadline and the Effectiveness Period. The parties agree that notwithstanding anything to the contrary herein or in the Funding or Merger Agreement(s), no Liquidated Damages shall be payable (i) to a Holder if as of the relevant Event Date, all Registrable Securities held by it may be sold by the Holder without volume or manner of sale restrictions under Rule 144, as determined by counsel to the Company pursuant to a written opinion letter to such effect, addressed and reasonably acceptable to the Company’s transfer agent, (ii) to a Holder causing an Event that relates to or is caused by any action or inaction taken by such Holder, (iii) to a Holder in the event it is unable to lawfully sell any of its Registrable Securities (including, without limitation, in the event a Grace Period exceeds the length of an Allowable Grace Period) because of possession of material non-public information

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or (iv) with respect to any period after the expiration of the Effectiveness Period (it being understood that this clause shall not relieve the Company of any Liquidated Damages accruing prior to the expiration of the Effectiveness Period). If the Company fails to pay any Liquidated Damages pursuant to this Section 2(c) of the Agreement in full within ten (10) Business Days after the date payable, the Company will pay interest on the amount of Liquidated Damages then owing to the Holder at a rate of 1.0% per month on an annualized basis (or such lesser maximum amount that is permitted to be paid by applicable law) to the Holder, accruing daily from the date such Liquidated Damages are due until such amounts, plus all such interest thereon, are paid in full. The Liquidated Damages pursuant to the terms hereof shall apply on a daily pro-rata basis for any portion of a month prior to the cure of an Event, except in the case of the first Event Date. With respect to a Holder, the Effectiveness Deadline for a Required Registration Statement shall be extended without default or Liquidated Damages hereunder in accordance with Section 3(k) of the Agreement in the event that the Company’s failure to obtain the effectiveness of the Registration Statement on a timely basis results from the failure of such Holder timely to provide the Company with information requested by the Company and necessary to complete the Registration Statement in accordance with the requirements of the Securities Act.

3.    Registration Procedures.

In connection with the Company’s registration obligations hereunder:

(a)    The Company shall, not less than one Trading Day prior to the filing of a Registration Statement or any related Prospectus or any amendment or supplement thereto (except for Annual Reports on Form 10‑K, Quarterly Reports on Form 10-Q, proxy statements and Current Reports on Form 8‑K, and any similar or successor reports), furnish to one legal counsel designated by a majority of the outstanding Registrable Securities (“Holders Counsel”), copies of such Registration Statement, Prospectus, or amendment or supplement thereto, as proposed to be filed, which document will be subject to the reasonable review and comment of Holders Counsel; provided that each Holder shall have the right to review and comment on, prior to filing, its selling shareholder information.

(b)    (i) The Company shall prepare and file with the Commission such amendments, including post-effective amendments and supplements, to each Registration Statement and the Prospectus used in connection therewith as may be necessary to keep such Registration Statement continuously effective as to the applicable Registrable Securities for its Effectiveness Period (except during an Allowable Grace Period); (ii) the Company shall cause the related Prospectus to be amended or supplemented by any required Prospectus supplement (subject to the terms of this Agreement), and, as so supplemented or amended, to be filed pursuant to Rule 424 (except during an Allowable Grace Period); (iii) the Company shall respond as promptly as reasonably practicable to any comments received from the Commission with respect to each Registration Statement or any amendment thereto and, as promptly as reasonably possible, provide the Holders Counsel true and complete copies of all correspondence from and to the Commission relating to such Registration Statement that pertains to the Holders as “Selling Shareholders”; and (iv) the Company shall comply in all material respects with the provisions of the Securities Act with respect to the disposition of all Registrable Securities covered by a Registration Statement until such time as all of such Registrable Securities shall have been disposed of (subject to the terms of this Agreement) in accordance with the intended methods of disposition by the Holders thereof as set forth in such Registration Statement as so amended or in such Prospectus as so supplemented; provided, that each Holder shall be responsible for the delivery of the Prospectus to the Persons to whom such Holder sells any of the Registrable Securities (including in accordance with Rule 172 under the Securities Act), and each Holder agrees to dispose of Registrable

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Securities in compliance with applicable federal and state securities laws. In the case of amendments and supplements to a Registration Statement that are required to be filed pursuant to this Agreement (including pursuant to this Section 3(b)) by reason of the Company filing a report on Form 10‑K, Form 10-Q, or Form 8‑K, or any analogous report under the Exchange Act, the Company shall have incorporated such report by reference into such Registration Statement, if applicable, or shall file such amendments or supplements with the Commission as promptly as practicable.

(c)    The Company shall notify the Holders (which notice shall, pursuant to clauses (ii) through (iv) hereof, be accompanied by an instruction to suspend the use of the Prospectus until the requisite changes have been made, if applicable) as promptly as reasonably practicable following the day (i)(A) when a Prospectus or any Prospectus supplement or post-effective amendment to a Registration Statement has been filed with the Commission (except for Annual Reports on Form 10‑K, Quarterly Reports on Form 10-Q, proxy statements and Current Reports on Form 8‑K and any similar or successor reports); and (B) with respect to each Registration Statement or any post-effective amendment, when the same has become effective; (ii) of the issuance by the Commission or any other federal or state Governmental Entity of any stop order suspending the effectiveness of a Registration Statement covering any or all of the Registrable Securities or the initiation of any Proceedings for that purpose; (iii) of the receipt by the Company of any notification with respect to the suspension of the qualification or exemption from qualification of any of the Registrable Securities for sale in any jurisdiction, or the initiation or threatening of any Proceeding for such purpose; and (iv) of the occurrence of any event or passage of time that makes the financial statements included in a Registration Statement ineligible for inclusion therein or any statement made in such Registration Statement or Prospectus or any document incorporated or deemed to be incorporated therein by reference untrue in any material respect or that requires any revisions to such Registration Statement, Prospectus or other documents so that, in the case of such Registration Statement or the Prospectus, as the case may be, it will not contain any untrue statement of a material fact or omit to state any material fact required to be stated therein or necessary to make the statements therein (in the case of any Prospectus, form of prospectus or supplement thereto, in light of the circumstances under which they were made), not misleading.

(d)    Notwithstanding anything to the contrary herein, at any time after the Registration Statement has been declared effective by the Commission, the Company may delay the disclosure of material non-public information concerning the Company if the disclosure of such information at the time is not, in the good faith judgment of the Company, in the best interests of the Company (such delay, a “Grace Period”). During the Grace Period, the Company shall not be required to maintain the effectiveness of any Registration Statement filed hereunder and, in any event, Holders shall suspend sales of Registrable Securities pursuant to such Registration Statements during the pendency of the Grace Period provided, the Company shall promptly (i) notify the Holders of the existence of material non-public information giving rise to a Grace Period or the need to file a post-effective amendment, as applicable, and the date on which such Grace Period will begin, (ii) use reasonable efforts to terminate a Grace Period as promptly as practicable provided that such termination is, in the good faith judgment of the Company, in the best interest of the Company, and (iii) notify the Holders in writing of the date on which the Grace Period ends; provided, further, that, with respect to a Required Registration Statement only, no single Grace Period shall exceed sixty (60) consecutive calendar days, and during any three hundred sixty-five (365) calendar day period, the aggregate of all Grace Periods shall not exceed an aggregate of ninety (90) calendar days (each Grace Period complying with this provision being an “Allowable Grace Period”). For purposes of determining the length of a Grace Period, the Grace Period shall be deemed to begin on and include the date the Holders receive the notice referred to in clause (i) above and shall end on and include the later of the date the Holders receive the notice referred

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to in clause (iii) above and the date referred to in such notice; provided, that no Grace Period shall be longer than an Allowable Grace Period. Notwithstanding anything to the contrary, the Company shall use reasonable best efforts to cause the Transfer Agent to deliver unlegended Shares to a transferee of a Holder in connection with any sale of Registrable Securities with respect to which a Holder has entered into an irrevocable contract for sale prior to the Holder’s receipt of the notice of a Grace Period and for which the Holder has not yet settled.

(e)    The Company shall use reasonable efforts to avoid the issuance of, or, if issued, obtain the withdrawal of (i) any order suspending the effectiveness of a Registration Statement, or (ii) any suspension of the qualification (or exemption from qualification) of any of the Registrable Securities for sale in any jurisdiction, as soon as practicable.

(f)    The Company shall, if requested by a Holder, furnish to such Holder, without charge, at least one (1) conformed copy of each Registration Statement and each amendment thereto and all exhibits to the extent requested by such Holder (including those previously furnished or incorporated by reference) promptly after the filing of such documents with the Commission; provided, that the Company shall have no obligation to provide any document pursuant to this clause that is available on the Commission’s EDGAR or successor system.

(g)    The Company agrees to deliver promptly to each Holder whose Registrable Securities are included in the applicable Registration Statement, without charge, a PDF electronic copy of each Prospectus or Prospectuses (including each form of prospectus) and each amendment or supplement thereto as such Persons may reasonably request. The Company will provide hard copies to such Persons upon request. The Company hereby consents to the use of such Prospectus and each amendment or supplement thereto by each of the selling Holders in connection with the offering and sale of Registrable Securities covered by such Prospectus and any amendment or supplement thereto.

(h)    The Company shall, prior to any resale of Registrable Securities by a Holder, use its reasonable efforts to register or qualify or cooperate with the selling Holders in connection with the registration or qualification (or exemption from the registration or qualification) of such Registrable Securities for the resale by the Holder under the securities or Blue Sky laws of such jurisdictions within the United States as any Holder reasonably requests in writing, to keep each registration or qualification (or exemption therefrom) effective during the Effectiveness Period and to do any and all other acts or things reasonably necessary to enable the disposition in such jurisdictions of the Registrable Securities covered by each Registration Statement; provided, that the Company shall not be required to qualify generally to do business in any jurisdiction where it is not then so qualified, subject the Company to any general tax in any such jurisdiction where it is not then so subject, or file a consent to service of process in any such jurisdiction.

(i)    The Company shall reasonably cooperate with the Holders to facilitate the timely preparation and delivery of certificates representing Registrable Securities to be delivered to a transferee pursuant to the Registration Statement, which certificates shall be free, to the extent permitted by the Funding Agreement and under law, of all restrictive legends, and to enable such Registrable Securities to be in such denominations and registered in such names as any such Holders may reasonably request. Certificates for Registrable Securities free from all restrictive legends may be transmitted by the transfer agent to a Holder by crediting the account of such Holder’s prime broker with DTC as directed by such Holder.

(j)    The Company shall following the occurrence of any event contemplated by Sections 3(c)(ii)‑(iv), as promptly as reasonably practicable, as applicable: (i) use its reasonable efforts to

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prevent the issuance of any stop order or obtain its withdrawal at the earliest possible moment if the stop order have been issued, or (ii) taking into account the Company’s good faith assessment of any adverse consequences to the Company and its shareholders of the premature disclosure of such event, prepare and file a supplement or amendment, including a post-effective amendment, to the affected Registration Statements or a supplement to the related Prospectus or any document incorporated or deemed to be incorporated therein by reference, and file any other required document so that, as thereafter delivered, no Registration Statement nor any Prospectus will contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein (in the case of any Prospectus, form of prospectus or supplement thereto, in light of the circumstances under which they were made), not misleading.

(k)    The Company may require each selling Holder to furnish to the Company a certified statement as to (i) the number of securities of the Company beneficially owned by such Holder and any Affiliate thereof, (ii) any Financial Industry Regulatory Authority (“FINRA”) affiliations, (iii) any natural persons who have the power to vote or dispose of the Common Stock and (iv) any other information as may be requested by the Commission, FINRA, any state securities commission or any other government or regulatory body with jurisdiction over the Company or its activities. During any periods that the Company is unable to meet its obligations hereunder with respect to the registration of Registrable Securities because any Holder fails to furnish such information, any Liquidated Damages that are accruing at such time as to such Holder shall be tolled and any Event that may otherwise occur solely because of such delay shall be suspended as to such Holder only, until such information is delivered to the Company.

(l)    The Company shall cooperate with any registered broker through which a Holder proposes to resell its Registrable Securities in effecting a filing with FINRA pursuant to FINRA Rule 5110 as requested by any such Holder and the Company shall pay the filing fee required for the first such filing (but not additional filings) within five (5) Business Days of the request therefore.

(m)    If requested by a Holders Counsel, the Company shall (i) promptly incorporate in a Prospectus supplement or post-effective amendment to the Registration Statement such information as the Company reasonably agrees (upon advice of legal counsel) is required to be included therein and (ii) make all required filings of such Prospectus supplement or such post-effective amendment as soon as reasonably practicable after the Company has received notification of the matters to be incorporated in such Prospectus supplement or post-effective amendment.

4.    Registration Expenses. All fees and expenses incident to the Company’s performance of or compliance with its obligations under this Agreement (excluding any selling commissions, stock transfer taxes and fees of legal counsel for the Holders) shall be borne by the Company whether or not any Registrable Securities are sold pursuant to a Registration Statement. The fees and expenses referred to in the foregoing sentence that are the Company’s responsibility shall include, without limitation, (i) all registration and filing fees (including, without limitation, fees and expenses (A) with respect to filings required to be made with any Trading Market on which the Common Stock is then listed for trading, (B) with respect to compliance with applicable state securities or Blue Sky laws (including, without limitation, fees and disbursements of legal counsel for the Company in connection with Blue Sky qualifications or exemptions of the Registrable Securities and determination of the eligibility of the Registrable Securities for investment under the laws of such jurisdictions as requested by the Holders) and (C) if not previously paid by the Company in connection with an issuer filing, with respect to any filing that may be required to be made by any broker through which a Holder intends to make sales of Registrable Securities with FINRA pursuant to FINRA Rule 5110, so long

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as the broker is receiving no more than a customary brokerage commission in connection with such sale, (ii) printing expenses (including, without limitation, expenses of printing certificates for Registrable Securities and of printing prospectuses if the printing of prospectuses is reasonably requested by the Holders of a majority of the Registrable Securities included in the Registration Statement), (iii) messenger, telephone and delivery expenses of the Company, (iv) fees and disbursements of legal counsel for the Company, and (v) fees and expenses of all other Persons retained by the Company in connection with the consummation of the transactions contemplated by this Agreement. In addition, the Company shall be responsible for all of its internal expenses incurred in connection with the consummation of the transactions contemplated by this Agreement (including, without limitation, all salaries and expenses of its officers and employees performing legal or accounting duties), the expense of any annual audit, and the fees and expenses incurred in connection with the listing of the Registrable Securities on any securities exchange as required hereunder.

5.    Indemnification.

(a)    Indemnification by the Company. The Company shall, notwithstanding any termination of this Agreement, indemnify, defend and hold harmless each Holder and each of their respective officers, directors, agents, general partners, managing members, managers, Affiliates and employees, each Person who controls any such Holder (within the meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act) and the officers, directors, general partners, managing members, managers, agents and employees of such controlling Person, to the fullest extent permitted by applicable law, from and against any and all losses, claims, damages, liabilities, costs (including, without limitation, reasonable costs of preparation and investigation and reasonable and documented attorneys’ fees) and expenses (collectively, “Losses”), as incurred, that arise out of or are based upon (i) any untrue or alleged untrue statement of a material fact contained in any Registration Statement, any Prospectus or any form of prospectus or in any amendment or supplement thereto or in any preliminary prospectus, or arising out of or relating to any omission or alleged omission to state a material fact required to be stated therein or necessary to make the statements therein (in the case of any Prospectus or form of prospectus or supplement thereto, in light of the circumstances under which they were made) not misleading, or (ii) any violation or alleged violation by the Company of the Securities Act, Exchange Act or any state securities law or any rule or regulation thereunder, in connection with the performance of its obligations under this Agreement, except to the extent, but only to the extent, that (A) such untrue statements, alleged untrue statements, omissions or alleged omissions are based solely upon information regarding such Holder furnished to the Company by such Holder or on behalf of such Holder expressly for use therein, or to the extent that such information relates to such Holder or such Holder’s proposed method of distribution of Registrable Securities and was reviewed and approved by such Holder or Holders Counsel expressly for use in the Registration Statement, such Prospectus or such form of Prospectus or in any amendment or supplement thereto, (B) Holder’s failure to deliver or cause to be delivered the Prospectus or any amendment or supplement thereto made available by the Company in compliance with Section 6(g), or (C) in the case of an occurrence of an event of the type specified in Sections 3(c)(ii)‑(iv), related to the use by a Holder of an outdated or defective Prospectus after the Company has notified such Holder that the Prospectus is outdated or defective and prior to the receipt by such Holder of the Advice contemplated and defined in Section 6(h) below, but only if and to the extent that following the receipt of the Advice the misstatement or omission giving rise to such Loss would have been corrected. Such indemnity shall remain in full force and effect regardless of any investigation made by or on behalf of an Indemnified Party (as defined in Section 5(c) below) and shall survive the transfer of the Registrable Securities by the Holders.

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(b)    Indemnification by Holders. Each Holder shall, notwithstanding any termination of this Agreement, severally and not jointly, indemnify and hold harmless the Company, its directors, officers, agents and employees, each Person who controls the Company (within the meaning of Section 15 of the Securities Act and Section 20 of the Exchange Act), and the directors, officers, agents or employees of such controlling Persons, to the fullest extent permitted by applicable law, from and against all Losses, as incurred, arising out of or are based upon (i) any untrue or alleged untrue statement of a material fact contained in any Registration Statement, any Prospectus, or any form of prospectus, or in any amendment or supplement thereto or in any preliminary prospectus, or arising out of or relating to any omission or alleged omission of a material fact required to be stated therein or necessary to make the statements therein (in the case of any Prospectus, or any form of prospectus or supplement thereto, in light of the circumstances under which they were made) not misleading (A) to the extent, but only to the extent, that such untrue statements or omissions are based solely upon information regarding such Holder furnished to the Company by or on behalf of such Holder expressly for use therein, or (B) to the extent, but only to the extent, that such information relates to such Holder or such Holder’s proposed method of distribution of Registrable Securities and was reviewed and approved by such Holder or Holders Counsel expressly for use in a Registration Statement, such Prospectus or such form of Prospectus or in any amendment or supplement thereto or (C) in the case of an occurrence of an event of the type specified in Sections 3(c)(ii)- (iv), to the extent, but only to the extent, related to the use by such Holder of an outdated or defective Prospectus after the Company has notified such Holder that the Prospectus is outdated or defective and prior to the receipt by such Holder of the Advice contemplated in Section 6(h), but only if and to the extent that following the receipt of the Advice the misstatement or omission giving rise to such Loss would have been corrected, or (ii) Holder’s failure to deliver or cause to be delivered the Prospectus or any amendment or supplement thereto made available by the Company in compliance with Section 6(g) herein. In no event shall the liability of any selling Holder hereunder be greater in amount than the dollar amount of the net proceeds received by such Holder upon the sale of the Registrable Securities giving rise to such indemnification obligation.

(c)    Conduct of Indemnification Proceedings. If any Proceeding shall be brought or asserted against any Person entitled to indemnity hereunder (an “Indemnified Party”), such Indemnified Party shall promptly notify the Person from whom indemnity is sought (the “Indemnifying Party”) in writing, and the Indemnifying Party shall have the right to assume the defense thereof, including the employment of one (1) legal counsel reasonably satisfactory to the Indemnified Party and the payment of all reasonable and documented fees and expenses incurred in connection with defense thereof; provided, that the failure of any Indemnified Party to give such written notice within a reasonable time of commencement of any such Proceeding shall not relieve the Indemnifying Party of its obligations or liabilities pursuant to this Agreement, except (and only) to the extent that such failure shall have materially and adversely prejudiced the Indemnifying Party in its ability to defend such Proceeding.

An Indemnified Party shall have the right to employ separate legal counsel in any such Proceeding and to participate in the defense thereof, but the fees and expenses of such counsel shall be at the expense of such Indemnified Party or Indemnified Parties unless: (1) the Indemnifying Party has agreed in writing to pay such fees and expenses; (2) the Indemnifying Party shall have failed promptly to assume the defense of such Proceeding and to employ legal counsel reasonably satisfactory to such Indemnified Party in any such Proceeding; or (3) the named parties to any such Proceeding (including any impleaded parties) include both such Indemnified Party and the Indemnifying Party, and such Indemnified Party shall have been advised by legal counsel in writing that a conflict of interest exists if the same counsel were to represent such Indemnified Party and the Indemnifying Party; provided, that the Indemnifying Party shall

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not be liable for the fees and expenses of more than one separate firm of attorneys plus local legal counsel at any time for all Indemnified Parties. The Indemnifying Party shall not be liable for any settlement of any such Proceeding effected without its written consent, which consent shall not be unreasonably withheld, delayed or unreasonably conditioned. No Indemnifying Party shall, without the prior written consent of the Indemnified Party, effect any settlement of any pending Proceeding in respect of which any Indemnified Party is a party, unless such settlement includes an unconditional release of such Indemnified Party from all liability on claims that are the subject matter of such Proceeding.

Subject to the terms of this Agreement, all documented fees and expenses of the Indemnified Party (including reasonable fees and expenses to the extent incurred in connection with investigating or preparing to defend such Proceeding in a manner not inconsistent with this Section 5(c) of the Agreement) shall be paid to the Indemnified Party, as incurred, within twenty (20) Trading Days of written notice thereof to the Indemnifying Party; provided, that the Indemnified Party shall promptly reimburse the Indemnifying Party for that portion of such fees and expenses applicable to such actions for which such Indemnified Party is finally judicially determined to not be entitled to indemnification hereunder.

(d)    Contribution. If a claim for indemnification under Section 5(a) or 5(b) of the Agreement is unavailable to an Indemnified Party (other than in accordance with its terms) or insufficient to hold an Indemnified Party harmless for any Losses, then each Indemnifying Party, in lieu of indemnifying such Indemnified Party, shall contribute to the amount paid or payable by such Indemnified Party as a result of such Losses, in such proportion as is appropriate to reflect the relative fault of the Indemnifying Party, on the one hand, and the Indemnified Party, on the other hand, in connection with the actions, statements or omissions that resulted in such Losses as well as any other relevant equitable considerations. The relative fault of such Indemnifying Party, on the one hand, and such Indemnified Party, on the other hand, shall be determined by reference to, among other things, whether any action in question, including any untrue or alleged untrue statement of a material fact or omission or alleged omission of a material fact, has been taken or made by, or relates to information supplied by, such Indemnifying Party or Indemnified Party, and the parties’ relative intent, knowledge, access to information and opportunity to correct or prevent such action, statement or omission. The amount paid or payable by a party as a result of any Losses shall be deemed to include, subject to the limitations set forth in this Agreement, any reasonable attorneys’ or other reasonable fees or expenses incurred by such party in connection with any Proceeding to the extent such party would have been indemnified for such fees or expenses if the indemnification provided for in this Section 5(d) was available to such party in accordance with its terms. The parties hereto agree that it would not be just and equitable if contribution pursuant to this Section 5(d) were determined by pro rata allocation or by any other method of allocation that does not take into account the equitable considerations referred to in the immediately preceding paragraph. Notwithstanding the provisions of this Section 5(d), no Holder shall be required to contribute, in the aggregate, any amount in excess of the amount by which the net proceeds actually received by such Holder from the sale of the Registrable Securities subject to the Proceeding exceeds the amount of any damages that such Holder has otherwise been required to pay by reason of such untrue or alleged untrue statement or omission or alleged omission. No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Securities Act) shall be entitled to contribution from any Person who was not guilty of such fraudulent misrepresentation.

The indemnity and contribution agreements contained in this Section 5 of the Agreement are in addition to any liability that the Indemnifying Parties may have to the Indemnified Parties and are not in diminution or limitation of the indemnification provisions under the Funding and Merger Agreements.

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6.    Miscellaneous.

(a)    Remedies. In the event of a breach by the Company or by a Holder of any of their obligations under this Agreement, each Holder or the Company, as the case may be, in addition to being entitled to exercise all rights granted by law and under this Agreement, including recovery of damages, will be entitled to specific performance of its rights under this Agreement. The Company and each Holder agree that monetary damages would not provide adequate compensation for any losses incurred by reason of a breach by it of any of the provisions of this Agreement and hereby further agrees that, in the event of any action for specific performance in respect of such breach, it shall waive the defense that a remedy at law would be adequate.

(b)    Rule 144 Requirements. For so long as the Company is subject to the reporting requirements of the Exchange Act, the Company will use its reasonable efforts to timely file with the Commission such reports and information required to be filed by it under the Securities Act and the Exchange Act and the rules and regulations adopted by the Commission thereunder and as the Commission may require. The Company shall furnish to any Holder of Registrable Securities forthwith upon request a written statement as to its compliance with the reporting requirements of Rule 144 (or any successor exemptive rule), the Securities Act and the Exchange Act (at any time that it is subject to such reporting requirements); and such reports and documents as such Person may reasonably request in availing itself of any rule or regulation of the Commission allowing it to sell any such securities without registration.

(c)    Obligations of Holders and Others in a Registration. Each Holder agrees timely to furnish in writing such information regarding such Person, the securities sought to be registered, and the intended method of disposition of the Registrable Securities held by it, as shall reasonably be required to effect the registration of such Registrable Securities (the “Requested Information”) and shall take such other action as the Company may reasonably request in connection with the registration, qualification or compliance or as otherwise provided herein. At least ten (10) Business Days prior to the first anticipated filing date of a Registration Statement, the Company shall notify each Holder of the information the Company requires from such Holder. If at least five (5) business days prior to the filing date, the Company has not received the Requested Information from a Holder (a “Non-Responsive Holder”), then the Company may exclude from any Registration Statement the Registrable Securities of such Non-Responsive Holder.

(d)    Limitations on Subsequent Registration Rights. The Company will not enter into any agreements with any holder or prospective holder of any securities of the Company which would grant such holder or prospective holder registration rights with respect to the securities of the Company that would have priority over the Registrable Securities with respect to the inclusion of such securities in any registration. If the Company enters into an agreement that contains terms more favorable, in form or substance, to any shareholders than the terms provided to the Holders under this Agreement, then the Company will modify or revise the terms of this Agreement in order to reflect any such more favorable terms for the benefit of the Holders.

(e)    Compliance. Each Holder covenants and agrees that it will comply with the prospectus delivery requirements of the Securities Act as applicable to it (unless an exemption therefrom is available) in connection with sales of Registrable Securities pursuant to the Registration Statement and shall sell the Registrable Securities only in accordance with a method of distribution described in the Registration Statement.

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(f)    Discontinued Disposition. By its acquisition of Registrable Securities, each Holder agrees that, upon receipt of a notice from the Company of the occurrence of any event of the kind described in Sections 3(c)(ii)‑(iv) of the Agreement, such Holder will forthwith discontinue disposition of such Registrable Securities under a Registration Statement until it is advised in writing (the “Advice”) by the Company that the use of the applicable Prospectus (as it may have been supplemented or amended) may be resumed. The Company may provide appropriate stop orders to enforce the provisions of this paragraph.

(g)    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 hereof, enter into any agreement with respect to its securities, that would have the effect of impairing the rights granted to either party in this Agreement or otherwise conflicts with the provisions hereof.

(h)    Amendments and Waivers. The provisions of this Agreement, including the provisions of this sentence, may not be amended, modified or supplemented, or waived unless the same shall be in writing and signed by the Company and Holders of a majority of the then outstanding Registrable Securities; provided that any such amendment, modification, supplement or waiver that materially, adversely and disproportionately effects the rights or obligations of any Holder vis-a-vis the other Holders shall require the prior written consent of such Holder.

(i)    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 facsimile or e‑mail (provided the sender receives a machine-generated confirmation of successful facsimile transmission or e‑mail notification or confirmation of receipt of an e‑mail transmission) at the facsimile number or e‑mail address specified in this Section prior to 5:00 p.m., New York City time, on a Trading Day, (b) the next Trading Day after the date of transmission, if such notice or communication is delivered via facsimile at the facsimile number specified in this Section on a day that is not a Trading Day or later than 5:00 p.m., New York City time, on any Trading Day, (c) the Trading Day following the date of mailing, if sent by U.S. nationally recognized overnight courier service with next day delivery specified, or (d) upon actual receipt by the party to whom such notice is required to be given.

The address for such notices and communications shall be as follows:

If to the Company: Brickell Biotech, Inc.5777 Central Avenue, Suite 102Boulder, CO 80301Attention: Andy SklawerTelephone: 305-582-4657E-mail: asklawer@brickellbio.com

With a copy to: Mayer Brown LLP1221 Avenue of the AmericasNew York, NY 10020Attention: Anna T. PinedoTelephone: 212-506-2275E-mail: apinedo@mayerbrown.com

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If to the Purchaser: NovaQuest Co-Investment Fund X4208 Six Forks Road, Suite 920
Raleigh, NC 27609
Attention: Jonathan Tunnicliffe
Email: jonathan.tunnicliffe@nqcapital.comFacsimile: 919-516-0580

With a copy to: Wyrick Robbins Yates & Ponton LLP4101 Lake Boone Trial, Suite 300Raleigh, NC 27607
Attention: Daniel S. Porper
Email: dporper@wyrick.comFacsimile: 919-781-4865

If to a Holder who is not the Purchaser, then to such address as may be designated in writing hereafter, in the same manner, by such Person.

(j)    Successors and Assigns. This Agreement shall inure to the benefit of and be binding upon the successors and permitted assigns of each 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 permitted successors and assigns any rights, remedies, obligations, or liabilities under or by reason of this Agreement, except as expressly provided in this Agreement. The Company may not assign its rights (except by merger or in connection with another entity acquiring all or substantially all of the Company’s assets) or obligations hereunder without the prior written consent of all of the Holders of the then outstanding Registrable Securities. The rights to have the Company register Registrable Securities pursuant to this Agreement shall be automatically assigned by a Holder to any transferee of the Shares only if: (i) the Holder agrees in writing with the transferee or assignee to assign such rights; (ii) the Company is, within a reasonable time after such transfer or assignment, furnished with written notice of (A) the name and address of such transferee or assignee and (B) the securities with respect to which such registration rights are being transferred or assigned; and (iii) at or before the time the Company received the written notice contemplated by clause (ii) of this sentence, the transferee or assignee agrees in writing with the Company to be bound by all of the provisions contained herein with respect to a Holder. In the event of any delay in filing or effectiveness of the Registration Statement as a result of such assignment by a Holder or its transferee, the Company shall not be liable for any damages arising from such delay.

(k)    Execution and Counterparts. This Agreement may be executed in two (2) or more counterparts, each of which when so executed shall be deemed to be an original and, all of which taken together shall constitute 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 were the original thereof.

(l)    Governing Law and Jurisdiction. This Agreement shall be governed by and construed in accordance with the internal laws of the State of New York applicable to contracts made and

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to be performed entirely within such State. The parties hereby agree that all actions or proceedings arising out of or related to this Agreement shall be subject to the exclusive jurisdiction of the state and federal courts in the State of New York. All questions concerning the construction, validity, enforcement and interpretation of this Agreement shall be determined in accordance with the provisions of the Funding Agreement.

(m)    Cumulative Remedies. Except as provided in Section 2(c) of the Agreement with respect to Liquidated Damages, the remedies provided herein are cumulative and not exclusive of any other remedies provided by law.

(n)    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 good faith 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.

(o)    Headings. The headings in this Agreement are for convenience only and shall not limit or otherwise affect the meaning hereof.

(p)    Independent Nature of Holders’ Obligations and Rights. The obligations of each Holder under this Agreement 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 entity, or create a presumption that the Holders are in any way acting in concert with respect to such obligations or the transactions contemplated by this Agreement. 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. 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 the Holders.

(q)    Entire Agreement. This Agreement, the Warrant, the Funding Agreement, the Merger Agreement, and the Security Agreement constitute the entire agreement among the parties hereto with respect to the subject matter hereof. There are no restrictions, promises, warranties or undertakings, other than as set forth or referred to herein and in the Warrant, the Funding Agreement, the Merger Agreement, and the Security Agreement. For purposes of this Agreement only, this Agreement supersedes all prior agreements and understandings among the parties hereto with respect to the subject matter hereof.

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IN WITNESS WHEREOF, the parties have executed this Registration Rights Agreement as of the date first written above.

BRICKELL BIOTECH, INC.
By:     /s/ Robert Brown        Name: Robert Brown
Title: Chief Executive Officer

[Signature Page to Registration Rights Agreement]

IN WITNESS WHEREOF, the parties have executed this Registration Rights Agreement as of the date first written above.

NovaQuest Co-Investment Fund X, L.P.
By:	NQ POF V GP, LTD., its general partner
By:	/s/ John L. Bradley, Jr.
Name:	John L. Bradley, Jr.
Title:	Director

[Signature Page to Registration Rights Agreement]