Document:

EXHIBIT
10.1 

 

USA
EQUITIES CORP.

 

CONVERTIBLE
PROMISSORY NOTE

 

	Principal Amount:	$73,500 	Dated:	2/27/20
	Accrued Interest as of December 31, 2019:	$91,607	 	 

 

WHEREAS,
USA Equities Corp., a corporation organized under the laws of the State of Delaware, with offices at 901 Northpoint Parkway,
Suite 302, West Palm Beach, FL 33407 (the “Corporation”), is obligated to pay to Troy Grogan, with an address at C/O
901 Northpoint Parkway, Suite 302, West Palm Beach, FL 33407 (hereinafter, the “Holder”) the sum of $165,107 pursuant
to a convertible promissory note together with interest at 12% per annum due and payable on March 31, 2023 (the “Note”);
and

 

FOR
VALUE RECEIVED, the Corporation, pursuant to this Agreement, hereby promises and agrees to pay to Holder the sum of $165,107
in lawful money of the United States of America, (the “Principal”) with interest at one (12%) percent per annum (the
“Interest”) as follows:

 

	Section
    1.	PRINCIPAL
    and INTEREST:

 

The
Principal and Interest shall be due and payable at the offices of Corporation on March 31, 2023 (the “Maturity Date”),
unless Holder shall agree to extend the Maturity Date, or Holder elects to convert the Principal and all accrued Interest on this
Note into the shares of the Corporation’s common stock, par value $0.0001 (the “Shares”), as provided in Section
2 below, or unless the Corporation shall have elected to prepay the entire Principal and Interest due under this Convertible Promissory
Note on prior written notice to the Holder, as provided below.

 

	Section
    2.	CONVERSION
    RIGHTS:

 

(a)
The Principal and Interest due under this Convertible Promissory Note, or any portion thereof, may be converted into the Corporation’s
Shares, at the conversion price of $0.10 (the “Conversion Right”), which Conversion Right may be exercised in Holder’s
sole discretion from time to time, by written notice to the Corporation (the “Conversion Notice”), at its offices set
forth above, and upon receipt of such Conversion Notice, the Corporation shall immediately direct its transfer agent to issue
in the name of Holder or Holder’s designee a certificate for the appropriate number of Shares, which certificate shall bear
a restrictive legend reflecting that such Shares have not been registered under the Securities Act of 1933, as amended (the “Act”).

 

(b)
In addition to the foregoing Conversion Right, the Corporation grants to Holder “piggy-back” registration rights as
follows: (i) in the event that the Corporation shall authorize the preparation and filing of a registration statement under the
Act for the benefit of selling shareholders (the “Selling Shareholder Registration Statement”), the Corporation will
provide the Holder written notice not less than twenty (20) business days prior to the intending filing of the Selling Shareholder
Registration Statement (the “Registration Notice”); (ii) the Holder, within ten (10) business days of receipt of the
Corporation’s Registration Notice, at Holder’s sole election, deliver to the Corporation a Conversion Notice with
respect to all or such portion of the Principal and Interest then due and payable on the Note that Holder desires to convert under
Holder’s Conversion Right; and (iii) the Corporation shall include in the Selling Shareholder Registration Statement such
number of Holder’s Shares that shall be issuable pursuant to the Holder’s Conversion Notice, together with any other
Shares in the name of the Holder or Holder’s designee(s), to the maximum extent permissible pursuant to the provisions of
Rule 415 promulgated by the United States Securities and Exchange Commission (the “SEC”) under the Act in order to permit
the public resale by the Holder or Holder’s designee(s) of their respective Shares.

 

    	 

    	 	 	 

    

 

(c)
The Corporation further undertakes to file post-effective amendments to the Selling Shareholder Registration Statement, as may
be required in order for Holder or Holder’s designee(s) to be able to continue to publicly resell their respective Shares
under the Act and specifically in compliance with Section 5 of the Act, unless and exemption from registration shall be available
under the rules and regulations promulgated by the SEC under the Act. In order for the Corporation to comply with its obligation
to register the aforesaid Shares or an exemption shall be available to permit resale without registration under the act, the Corporation
further undertakes to remain current under in its reporting obligations under the Securities Exchange Act of 1934 (the “Exchange
Act”).

 

(d)
The Corporation represents that it shall engage counsel for the purpose of assisting the Corporation in its compliance with the
reporting requirements under the Exchange Act.

 

	Section
    3.	EVENTS
    OF DEFAULT:

 

In
the event that the Corporation shall fail to pay the Principal and Interest when due under this Note, or if the Corporation shall
fail to comply with its obligations under this Note and Agreement with respect to any Conversion Notice and/or Registration Notice,
or the Corporation shall fail to file reports under the Exchange Act when due (collectively, an “Event of Default”),
then the entire amount of Principal and Interest shall become immediately due and payable hereunder and this Note shall be deemed
to be in default. Holder shall have all rights provided and all remedies available under the laws of the State of Delaware as
a creditor of the Corporation upon such Event of Default.

 

	Section
    4.	RECLASSIFICATION,
    REORGANIZATION, MERGER:

 

In
case of any reclassification, reorganization or other restructure of the debt or capital stock of the Corporation, or if the Corporation
shall merge with or into another entity, the Corporation shall cause effective provision to be made in any agreement for such
reclassification, reorganization, merger or consolidation so that upon conversion of this Note, the Holder, as a result of an
adjustment in the conversion price and the shares issuable upon conversion hereof, will receive an economic benefit comparable
to that contemplated hereby.

 

IN
WITNESS WHEREOF, USA EQUITIES CORP. has caused this Convertible Promissory Note Modification Agreement to be issued in favor
of Holder and to be executed by its duly authorized officer as of this 27th day of February 2020.

 

USA
EQUITIES CORP.

 

/s/
Troy Grogan

 

Troy
Grogan, CEO, CFO

	Name	 	(Title)

 

    	 

    	 	 	 

    

 

EXHIBIT
I

USA
EQUITIES CORP

CONVERSION
NOTICE

 

Reference
is made to the Convertible Promissory Note (the “Note”) issued to the undersigned by USA Equities Corp a Delaware
corporation (the “corporation”). In accordance with and pursuant to the Note, the undersigned hereby elects to convert
the Conversion Amount (as defined in the Note) of the Note indicated below into shares of stock, $.0001 par value per share, as
of the date specified below. Capitalized terms not defined herein shall have their respective meanings as set forth in the Promissory
Note.

 

Date
of Conversion:

 

Aggregate
Principal to be converted:

Aggregate
accrued and unpaid Interest and accrued

and
unpaid late fees with respect to such portion of

the
aggregate Principal and such aggregate Interest

to
be converted:

 

AGGREGATE
CONVERSION AMOUNT TO BE

CONVERTED:

 

Please
confirm the following information:

 

Conversion
Price:

 

Type
and Number of shares of New Stock to be issued:

 

Please
issue the New Stock into which the

Promissory
Note is being converted in the

following
name and to the following address:

 

Issue
to:

 

Facsimile
Number:

 

Holder:

By:

Title:

Dated:

Account
Number:

(if
electronic book entry transfer)

Transaction
Code Number:

(if
electronic book entry transfer)

 

Address:

(if
delivery of share certificates)EX-4.1

 Exhibit 4.1 

REGISTRATION RIGHTS AGREEMENT 

REGISTRATION RIGHTS AGREEMENT (this “Agreement”), dated as of February 26, 2020, by and between CURIS, INC.,
a Delaware corporation (the “Company”), and ASPIRE CAPITAL FUND, LLC, an Illinois limited liability company (together with its permitted assigns, the “Buyer”). Capitalized terms used herein and not
otherwise defined herein shall have the respective meanings set forth in the Common Stock Purchase Agreement by and between the parties hereto, dated as of the date hereof (as amended, restated, supplemented or otherwise modified from time to time,
the “Purchase Agreement”). 
 WHEREAS: 

A.    Upon the terms and subject to the conditions of the Purchase Agreement, (i) the Company has agreed to issue to
the Buyer, and the Buyer has agreed to purchase, up to Thirty Million Dollars ($30,000,000) of the Company’s common stock, par value $0.01 per share (the “Common Stock”), pursuant to Section 1 of the Purchase Agreement
(such shares, the “Purchase Shares”), and (ii) the Company has agreed to issue to the Buyer such number of shares of Common Stock as is required pursuant to Section 4(e) of the Purchase Agreement (the
“Commitment Shares”); and 
 B.    To induce the Buyer to enter into the Purchase
Agreement, the Company has agreed to provide certain registration rights under the Securities Act of 1933, as amended, and the rules and regulations thereunder, or any similar successor statute (collectively, the “1933 Act”), and
applicable state securities laws. 
 NOW, THEREFORE, in consideration of the promises and the mutual covenants contained herein and
other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the Company and the Buyer hereby agree as follows: 
  

	 	1.	 DEFINITIONS. 

As used in this Agreement, the following terms shall have the following meanings: 

a.    “Person” means any person or entity including any corporation, a limited liability company, an
association, a partnership, an organization, a business, an individual, a governmental or political subdivision thereof or a governmental agency. 

b.    “Prospectus” means the base prospectus, including all documents incorporated
therein by reference, included in any Registration Statement (as hereinafter defined), as it may be supplemented by a prospectus or the Prospectus Supplement (as hereinafter defined), in the form in which such prospectus and/or Prospectus Supplement
have most recently been filed by the Company with the U.S. Securities and Exchange Commission (the “SEC”) pursuant to Rule 424(b) under the 1933 Act, together with any then issued “issuer free writing prospectus(es),” as
defined in Rule 433 of the 1933 Act, relating to the Registrable Securities. 
 c.    “Register,”
“registered,” and “registration” refer to a registration effected by preparing and filing one or more registration statements of the Company under the 1933 Act and pursuant to Rule 415 under the 1933 Act or any
successor rule providing for offering securities on a continuous basis (“Rule 415”), and the declaration or ordering of effectiveness of such registration statement(s) by the SEC. 

 d.    “Registrable Securities” means the Purchase
Shares that may from time to time be issued or issuable to the Buyer upon purchases of the Available Amount under the Purchase Agreement (without regard to any limitation or restriction on purchases) (including the Initial Purchase Shares), the
Commitment Shares issued or issuable to the Buyer, and any shares of capital stock issued or issuable with respect to the Purchase Shares, the Commitment Shares or the Purchase Agreement as a result of any stock split, stock dividend,
recapitalization, exchange or similar event, without regard to any limitation on purchases under the Purchase Agreement. 

e.    “Registration Statement” means the Shelf Registration Statement and any other registration
statement of the Company, as amended when it became effective, including all documents filed as part thereof or incorporated by reference therein, and including any information contained in a Prospectus subsequently filed with the SEC pursuant to
Rule 424(b) under the 1933 Act or deemed to be a part of such registration statement pursuant to Rule 430B or 462(b) of the 1933 Act, covering only the sale of the Registrable Securities. 

f.    “Shelf Registration Statement” means the Company’s existing registration statement on Form S-3 (File No. 333-224627). 
  

	 	2.	 REGISTRATION. 

a.    Mandatory Registration. The Company shall within two (2) Business Days from the Commencement Date file
with the SEC a prospectus supplement to the Shelf Registration Statement specifically relating to the Registrable Securities (the “Prospectus Supplement”). The Buyer and its counsel shall have had a reasonable opportunity to review
and comment upon such Prospectus Supplement prior to its filing with the SEC. The Buyer shall furnish all information reasonably requested by the Company for inclusion therein. The Company shall use its reasonable best efforts to keep the Shelf
Registration Statement effective pursuant to Rule 415 promulgated under the 1933 Act and available for sales of all of the Registrable Securities at all times until the earlier of (i) the Company no longer qualifies to make sales under the
Shelf Registration Statement (which shall be understood to include the inability of the Company to immediately register sales of Registrable Securities to the Buyer under the Shelf Registration Statement or any New Registration Statement (as defined
below) pursuant to General Instruction I.B.6 of Form S-3), (ii) the date on which the Company shall have sold all the Registrable Securities and no Available Amount remains under the Purchase Agreement, or
(iii) the date on which the Purchase Agreement is terminated (the “Registration Period”). The Shelf Registration Statement (including any amendments or supplements thereto and prospectuses contained therein) shall not contain
any 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 light of the circumstances under which they were made, not misleading. 

b.    Rule 424 Prospectus. The Company shall, to the extent required by applicable securities regulations, from
time to time file with the SEC, pursuant to Rule 424 promulgated under the 1933 Act, a prospectus, including any amendments or prospectus supplements thereto, to be used in connection with sales of the Registrable Securities under the Registration
Statement. The Buyer and its counsel shall have two (2) Business Days to review and comment upon such prospectus prior to its filing with the SEC. The Buyer shall use its reasonable best efforts to comment upon such prospectus within two
(2) Business Days from the date the Buyer receives the final version of such prospectus. 

 c.    Sufficient Number of Shares Registered. In the event the
number of shares available under the Shelf Registration Statement is insufficient to cover the Registrable Securities, the Company shall, to the extent necessary and permissible, amend the Shelf Registration Statement or file a new registration
statement (a “New Registration Statement”), so as to cover all of such Registrable Securities as soon as reasonably practicable, but in any event not later than ten (10) Business Days after the necessity therefor arises. The
Company shall use its reasonable best efforts to have such amendment and/or New Registration Statement become effective as soon as reasonably practicable following the filing thereof. 

 

	 	3.	 RELATED OBLIGATIONS. 

With respect to the Registration Statement and whenever any Registrable Securities are to be registered pursuant to Sections 2(a) and (c),
including on the Shelf Registration Statement or on any New Registration Statement, the Company shall use its reasonable best efforts to effect the registration of the Registrable Securities in accordance with the intended method of disposition
thereof and, pursuant thereto, the Company shall have the following obligations: 
 a.    The Company shall prepare and
file with the SEC such amendments (including post-effective amendments) and supplements to any Registration Statement and any New Registration Statement and any Prospectus used in connection with such Registration Statement, as may be necessary to
keep the Registration Statement or any New Registration Statement effective at all times during the Registration Period, subject to Permitted Delays and Section 3(e) hereof and, during such period, comply with the provisions of the 1933
Act with respect to the disposition of all Registrable Securities of the Company covered by the Registration Statement or any New Registration Statement until such time as all of such Registrable Securities shall have been disposed of in accordance
with the intended methods of disposition by the seller or sellers thereof as set forth in such Registration Statement. Should the Company file a post-effective amendment to the Registration Statement or a New Registration Statement, the Company will
use its reasonable best efforts to have such filing declared effective by the SEC within thirty (30) consecutive Business Days following the date of filing, which such period shall be extended for an additional thirty (30) Business Days if
the Company receives a comment letter from the SEC in connection therewith. If (i) there is material non-public information regarding the Company which the Company’s Board of Directors reasonably
determines not to be in the Company’s best interest to disclose and which the Company is not otherwise required to disclose or (ii) there is a significant business opportunity (including, but not limited to, the acquisition or disposition
of assets (other than in the ordinary course of business) or any merger, consolidation, tender offer or other similar transaction) available to the Company which the Company’s Board of Directors reasonably determines not to be in the
Company’s best interest to disclose and which the Company would be required to disclose under a Registration Statement or a New Registration Statement, then the Company may postpone or suspend filing or effectiveness of such Registration
Statement or New Registration Statement or use of the prospectus under the Registration Statement or New Registration Statement for a period not to exceed thirty (30) consecutive days, provided that the Company may not postpone or suspend its
obligation under this Section 3(a) for more than sixty (60) days in the aggregate during any twelve (12) month period (each, a “Permitted Delay”). 

 b.    The Company shall submit to the Buyer for review and comment any
disclosure in the Registration Statement, and all amendments and supplements thereto (other than prospectus supplements that consist only of a copy of a filed Form 10-K, Form
10-Q or Current Report on Form 8-K or any amendment as a result of the Company’s filing of a document that is incorporated by reference into the Registration
Statement), containing information provided by the Buyer for inclusion in such document and any descriptions or disclosure regarding the Buyer, the Purchase Agreement, including the transaction contemplated thereby, or this Agreement at least two
(2) Business Days prior to their filing with the SEC, and not file any document in a form to which Buyer reasonably and timely objects, unless required by applicable securities regulations. Upon request of the Buyer, the Company shall provide
to the Buyer all disclosure in the Registration Statement and all amendments and supplements thereto (other than prospectus supplements that consist only of a copy of a filed Form 10-K, Form 10-Q or Current Report on Form 8-K or any amendment as a result of the Company’s filing of a document that is incorporated by reference into a Registration Statement) at
least two (2) Business Days prior to their filing with the SEC, and not file any document in a form to which Buyer reasonably and timely objects, unless required by applicable securities regulations. The Buyer shall use its reasonable best
efforts to comment upon the Registration Statement or any New Registration Statement and any amendments or supplements thereto within two (2) Business Days from the date the Buyer receives the final version thereof. The Company shall furnish to
the Buyer, without charge, any correspondence from the SEC or the staff of the SEC to the Company or its representatives relating to the Registration Statement or any New Registration Statement. 

c.    Upon request of the Buyer, the Company shall furnish to the Buyer, (i) promptly after the same is prepared and
filed with the SEC, at least one copy of the Registration Statement and any amendment(s) thereto, including all financial statements and schedules, all documents incorporated therein by reference and all exhibits, (ii) upon the effectiveness of
any amendment(s) to a Registration Statement, a copy of the prospectus included in such Registration Statement and all amendments and supplements thereto (or such other number of copies as the Buyer may reasonably request) and (iii) such other
documents, including copies of any preliminary or final prospectus, as the Buyer may reasonably request from time to time in order to facilitate the disposition of the Registrable Securities owned by the Buyer. 

d.    The Company shall use reasonable best efforts to (i) register and qualify, unless an exemption from
registration and qualification is available, the Registrable Securities covered by a Registration Statement under such other securities or “blue sky” laws of such jurisdictions in the United States as the Buyer reasonably requests,
(ii) subject to Permitted Delays, prepare and file in those jurisdictions, such amendments (including post-effective amendments) and supplements to such registrations and qualifications as may be necessary to maintain the effectiveness thereof
during the Registration Period, (iii) take such other actions as may be necessary to maintain such registrations and qualifications in effect at all times during the Registration Period, and (iv) take all other actions reasonably necessary
or advisable to qualify the Registrable Securities for sale in such jurisdictions; provided, however, that the Company shall not be required in connection therewith or as a condition thereto to (x) qualify to do business in any jurisdiction
where it would not otherwise be required to qualify but for this Section 3(d), (y) subject itself to general taxation in any such jurisdiction, or (z) file a general consent to service of process in any such jurisdiction. The Company shall
promptly notify the Buyer who holds Registrable Securities of the receipt by the Company of any notification with respect to the suspension of the registration or qualification of any of the Registrable Securities for sale under the securities or
“blue sky” laws of any jurisdiction in the United States or its receipt of actual notice of the initiation or threat of any proceeding for such purpose. 

 e.    Subject to Permitted Delays, as promptly as reasonably practicable
after becoming aware of such event or facts, the Company shall notify the Buyer in writing if the Company has determined that the Prospectus included in any Registration Statement, as then in effect, includes an untrue statement of a material fact
or omits to state a material fact required to be stated therein or necessary to make the statements therein, in light of the circumstances under which they were made, not misleading, and as promptly as reasonably practical (taking into account the
Company’s good faith assessment of any adverse consequences to the Company and its stockholders of premature disclosure of such event or facts) prepare a prospectus supplement or amendment to such Registration Statement to correct such untrue
statement or omission, and, upon the Buyer’s request, deliver a copy of such prospectus supplement or amendment to the Buyer. In providing this notice to the Buyer, unless the Buyer consents to enter into a
non-disclosure agreement with the Company, the Company shall not include any other information about the facts underlying the Company’s determination and shall not in any way communicate any material
nonpublic information about the Company or the Common Stock to the Buyer, and the Company shall be permitted to remove any such information from a draft prospectus supplement or amendment notwithstanding the Company’s obligation to provide such
documents to the Buyer in advance of filing with the SEC. The Company shall also promptly notify the Buyer in writing (i) when a prospectus or any prospectus supplement or post-effective amendment has been filed, and when a Registration
Statement or any post-effective amendment has become effective (notification of such effectiveness shall be delivered to the Buyer by facsimile or e-mail on the same day of such effectiveness), (ii) of any
request by the SEC for amendments or supplements to any Registration Statement or related prospectus or related information, and (iii) of the Company’s reasonable determination that a post-effective amendment to a Registration Statement
would be appropriate. In no event shall the delivery of a notice under this Section 3(e), or the resulting unavailability of a Registration Statement, without regard to its duration, for disposition of securities by Buyer be considered a breach
by the Company of its obligations under this Agreement. The preceding sentence in this Section 3(e) does not limit whether an event of default has occurred as set forth in Section 9(a) of the Purchase Agreement. 

f.    The Company shall use its reasonable best efforts to prevent the issuance of any stop order or other suspension of
effectiveness of any Registration Statement, or the suspension of the qualification of any Registrable Securities for sale in any jurisdiction and, if such an order or suspension is issued, to obtain the withdrawal of such order or suspension at the
earliest practical time and to notify the Buyer of the issuance of such order and the resolution thereof or its receipt of actual notice of the initiation or threat of any proceeding for such purpose. 

g.    The Company shall (i) cause all the Registrable Securities to be listed on each securities exchange on which
securities of the same class or series issued by the Company are then listed, if any, if the listing of such Registrable Securities is then permitted under the rules of such exchange, or (ii) secure designation and quotation of all the
Registrable Securities if the Principal Market (as such term is defined in the Purchase Agreement) is an automated quotation system. The Company shall pay all fees and expenses in connection with satisfying its obligation under this Section. 

h.    The Company shall cooperate with the Buyer to facilitate the timely preparation and delivery of certificates or
book-entry forms (not bearing any restrictive legend) representing the Registrable Securities to be offered pursuant to any Registration Statement and enable such certificates or book-entry forms to be in such denominations or amounts as the Buyer
may reasonably request and registered in such names as the Buyer may request. 

 i.    The Company shall at all times provide a transfer agent and
registrar with respect to its Common Stock. 
 j.    If reasonably requested by the Buyer, the Company shall
(i) promptly incorporate in a prospectus supplement or post-effective amendment to the Registration Statement such information as the Buyer believes should be included therein relating to the sale and distribution of Registrable Securities,
including, without limitation, information with respect to the number of Registrable Securities being sold, the purchase price being paid therefor and any other terms of the offering of the Registrable Securities; (ii) make all required filings
of such prospectus supplement or post-effective amendment as promptly as practicable once notified of the matters to be incorporated in such prospectus supplement or post-effective amendment; and (iii) supplement or make amendments to any
Registration Statement (including by means of any document incorporated therein by reference). 
 k.    The Company
shall use its reasonable best efforts to cause the Registrable Securities covered by any Registration Statement to be registered with or approved by such other governmental agencies or authorities in the United States as may be necessary to
consummate the disposition of such Registrable Securities. 
 l.    If reasonably requested by the Buyer at any time,
the Company shall deliver to the Buyer a written confirmation of whether or not the effectiveness of such Registration Statement has lapsed at any time for any reason (including, without limitation, the issuance of a stop order) and whether or not
the Registration Statement is currently effective and available to the Company for sale of all of the Registrable Securities. 

m.    The Company agrees to take all other reasonable actions as necessary and reasonably requested by the Buyer to
expedite and facilitate disposition by the Buyer of Registrable Securities pursuant to any Registration Statement. 
  

	 	4.	 OBLIGATIONS OF THE BUYER. 

a.    The Buyer has furnished to the Company in Exhibit A hereto such information regarding itself, the Registrable
Securities held by it and the intended method of disposition of the Registrable Securities held by it as required to effect the registration of such Registrable Securities and shall execute such documents in connection with such registration as the
Company may reasonably request. The Company shall notify the Buyer in writing of any other information the Company reasonably requires from the Buyer in connection with any Registration Statement hereunder, and the Buyer shall promptly furnish such
information to the Company. The Buyer will as promptly as practicable notify the Company of any material change in the information set forth in Exhibit A, other than changes in its ownership of the Common Stock. 

b.    The Buyer agrees to cooperate with the Company as reasonably requested by the Company in connection with the
preparation and filing of any amendments and supplements to any Registration Statement hereunder. 

	 	5.	 EXPENSES OF REGISTRATION. 

All reasonable expenses of the Company, other than sales or brokerage commissions and fees and disbursements of counsel for the Buyer, incurred
in connection with registrations, filings or qualifications pursuant to Sections 2 and 3, including, without limitation, all registration, listing and qualifications fees, printers and accounting fees, and fees and disbursements of counsel for the
Company, shall be paid by the Company. 
  

	 	6.	 INDEMNIFICATION. 

a.    To the fullest extent permitted by law, the Company will, and hereby does, indemnify, hold harmless and defend the
Buyer, each Person, if any, who controls the Buyer, the members, the directors, officers, partners, employees, agents, representatives of the Buyer and each Person, if any, who controls the Buyer within the meaning of the 1933 Act or the Securities
Exchange Act of 1934, as amended (the “1934 Act”) (each, an “Indemnified Person”), against any third party losses, claims, damages, liabilities, judgments, fines, penalties, charges, costs, reasonable and documented
attorneys’ fees, amounts paid in settlement (with the prior consent of the Company, such consent not to be unreasonably withheld) or reasonable and documented expenses, (collectively, “Claims”) reasonably incurred in
investigating, preparing or defending any action, claim, suit, inquiry, proceeding, investigation or appeal taken from the foregoing by or before any court or governmental, administrative or other regulatory agency or body or the SEC, whether
pending or threatened, whether or not an indemnified party is or may be a party thereto (“Indemnified Damages”), to which any of them may become subject insofar as such Claims (or actions or proceedings, whether commenced or
threatened, in respect thereof) arise out of or are based upon: (i) any untrue statement or alleged untrue statement of a material fact in the Registration Statement, any New Registration Statement or any post-effective amendment thereto or in
any filing made in connection with the qualification of the offering under the securities or other “blue sky” laws of any jurisdiction in which Registrable Securities are offered (“Blue Sky Filing”), or the omission or
alleged omission to state a material fact required to be stated therein or necessary to make the statements therein not misleading, (ii) any untrue statement or alleged untrue statement of a material fact contained in the final Prospectus or
the omission or alleged omission to state therein any material fact necessary to make the statements made therein, in light of the circumstances under which the statements therein were made, not misleading, or (iii) any violation or alleged
violation by the Company of the 1933 Act, the 1934 Act, any other law, including, without limitation, any state securities law, or any rule or regulation thereunder relating to the offer or sale of the Registrable Securities pursuant to the
Registration Statement or any New Registration Statement or any post-effective amendment thereto (the matters in the foregoing clauses (i) through (iii) being, collectively, “Violations”). The Company shall reimburse each
Indemnified Person promptly as such expenses are incurred and are due and payable, for any reasonable and documented legal fees or other reasonable and documented expenses incurred by them in connection with investigating or defending any such
Claim. Notwithstanding anything to the contrary contained herein, the indemnification agreement contained in this Section 6(a): (A) shall not apply to a Claim by an Indemnified Person arising out of or based upon a Violation which occurs in
reliance upon and in conformity with information furnished in writing to the Company by the Buyer or such Indemnified Person expressly for use in connection with the preparation of the Registration Statement, any New Registration Statement, the
Prospectus or any such amendment thereof or supplement thereto, if such prospectus was timely made available by the Company; (B) with respect to any superseded prospectus, shall not inure to the benefit of any such person from whom the person
asserting any such Claim purchased the Registrable Securities that are the subject thereof (or to the benefit of any other Indemnified Person) if the untrue statement 

 
or omission of material fact contained in the superseded prospectus was corrected in the revised prospectus, as then amended or supplemented, if such revised prospectus was timely made available
by the Company pursuant to Section 3(c) or Section 3(e), and the Indemnified Person was promptly advised in writing not to use the incorrect prospectus prior to the use giving rise to a violation; (C) shall not be available to the
extent such Claim is based on a failure of the Buyer to deliver, or to cause to be delivered, the prospectus made available by the Company, if such prospectus was theretofore made available by the Company pursuant to Section 3(c) or
Section 3(e); and (D) shall not apply to amounts paid in settlement of any Claim if such settlement is effected without the prior written consent of the Company, which consent shall not be unreasonably withheld. Such indemnity shall remain
in full force and effect regardless of any investigation made by or on behalf of the Indemnified Person and shall survive the transfer of the Registrable Securities by the Buyer pursuant to Section 8. 

b.    In connection with the Registration Statement, any New Registration Statement or Prospectus, the Buyer agrees to
indemnify, hold harmless and defend, to the same extent and in the same manner as is set forth in Section 6(a), the Company, each of its directors, each of its officers who signed the Shelf Registration Statement or signs any New
Registration Statement, each Person, if any, who controls the Company within the meaning of the 1933 Act or the 1934 Act (collectively and together with an Indemnified Person, an “Indemnified Party”), against any Claim or
Indemnified Damages to which any of them may become subject, under the 1933 Act, the 1934 Act or otherwise, insofar as such Claim or Indemnified Damages arise out of or are based upon any Violation, in each case to the extent, and only to the
extent, that such Violation occurs in reliance upon and in conformity with written information about the Buyer set forth on Exhibit A attached hereto or updated from time to time in writing by the Buyer and furnished to the Company by
the Buyer expressly for inclusion in the Shelf Registration Statement or Prospectus or any New Registration Statement or from the failure of the Buyer to deliver or to cause to be delivered the prospectus made available by the Company, if such
prospectus was timely made available by the Company pursuant to Section 3(c) or Section 3(e); and, subject to Section 6(d), the Buyer will reimburse any legal or other expenses reasonably incurred by them in connection with
investigating or defending any such Claim; provided, however, that the indemnity agreement contained in this Section 6(b) and the agreement with respect to contribution contained in Section 7 shall not apply to amounts paid in settlement
of any Claim if such settlement is effected without the prior written consent of the Buyer, which consent shall not be unreasonably withheld. Such indemnity shall remain in full force and effect and shall survive the transfer of the Registrable
Securities by the Buyer pursuant to Section 8. 
 c.    Promptly after receipt by an Indemnified Person or
Indemnified Party under this Section 6 of notice of the commencement of any action or proceeding (including any governmental action or proceeding) involving a Claim, such Indemnified Person or Indemnified Party shall, if a Claim in respect
thereof is to be made against any indemnifying party under this Section 6, deliver to the indemnifying party a written notice of the commencement thereof, and the indemnifying party shall have the right to participate in, and, to the extent the
indemnifying party so desires, jointly with any other indemnifying party similarly noticed, to assume control of the defense thereof with counsel mutually satisfactory to the indemnifying party and the Indemnified Person or the Indemnified Party, as
the case may be, and upon such notice, the indemnifying party shall not be liable to the Indemnified Person or Indemnified Party for any legal or other expenses subsequently incurred by the Indemnified Person or Indemnified Party in connection with
the defense thereof; provided, however, that an Indemnified Person or Indemnified Party (together with all other Indemnified Persons and Indemnified Parties that may be represented without conflict by one counsel) shall have the right to retain its
own counsel with the fees and expenses to be paid by the indemnifying party, if, in the reasonable opinion of 

 
counsel retained by the indemnifying party, the representation by such counsel of the Indemnified Person or Indemnified Party and the indemnifying party would be inappropriate due to actual or
potential differing interests between such Indemnified Person or Indemnified Party and any other party represented by such counsel in such proceeding. The Indemnified Party or Indemnified Person shall cooperate with the indemnifying party in
connection with any negotiation or defense of any such action or claim by the indemnifying party and shall furnish to the indemnifying party all information reasonably available to the Indemnified Party or Indemnified Person which relates to such
action or claim. The indemnifying party shall keep the Indemnified Party or Indemnified Person fully apprised as to the status of the defense or any settlement negotiations with respect thereto. No indemnifying party shall be liable for any
settlement of any action, claim or proceeding effected without its written consent, provided, however, that the indemnifying party shall not unreasonably withhold, delay or condition its consent. No indemnifying party shall, without the consent of
the Indemnified Party or Indemnified Person, consent to entry of any judgment or enter into any settlement or other compromise which does not include as an unconditional term thereof the giving by the claimant or plaintiff to such Indemnified Party
or Indemnified Person of a release from all liability in respect to such claim or litigation. Following indemnification as provided for hereunder, the indemnifying party shall be subrogated to all rights of the Indemnified Party or Indemnified
Person with respect to all third parties, firms or corporations relating to the matter for which indemnification has been made. The failure to deliver written notice to the indemnifying party within a reasonable time of the commencement of any such
action shall not relieve such indemnifying party of any liability to the Indemnified Person or Indemnified Party under this Section 6, except to the extent that the indemnifying party is prejudiced in its ability to defend such action. 

d.    The indemnification required by this Section 6 shall be made by periodic payments of the amount thereof during
the course of the investigation or defense, as and when bills are received or Indemnified Damages are incurred. Any person receiving a payment pursuant to this Section 6 which person is later determined to not be entitled to such payment shall
return such payment (including reimbursement of expenses) to the person making it. 
 e.    The indemnity agreements
contained herein shall be in addition to (i) any cause of action or similar right of the Indemnified Party or Indemnified Person against the indemnifying party or others, and (ii) any liabilities the indemnifying party may be subject to
pursuant to the law. 
  

	 	7.	 CONTRIBUTION. 

To the extent any indemnification by an indemnifying party is prohibited or limited by law, the indemnifying party agrees to make the maximum
contribution with respect to any amounts for which it would otherwise be liable under Section 6 to the fullest extent permitted by law; provided, however, that: (i) no seller of Registrable Securities guilty of fraudulent misrepresentation
(within the meaning of Section 11(f) of the 1933 Act) shall be entitled to contribution from any party who was not guilty of fraudulent misrepresentation; and (ii) contribution by any seller of Registrable Securities shall be limited in
amount to the net amount of proceeds received by such seller from the sale of such Registrable Securities. 

	 	8.	 ASSIGNMENT OF REGISTRATION RIGHTS. 

The Company shall not assign this Agreement or any rights or obligations hereunder without the prior written consent of the Buyer; provided,
however, that any transaction, whether by merger, reorganization, restructuring, consolidation, financing or otherwise, whereby the Company remains the surviving entity immediately after such transaction shall not be deemed an assignment. The Buyer
may not assign its rights under this Agreement without the prior written consent of the Company. 
  

	 	9.	 AMENDMENT OF REGISTRATION RIGHTS. 

Provisions of this Agreement may be amended and the observance thereof may be waived (either generally or in a particular instance and either
retroactively or prospectively) only with the written consent of the Company and the Buyer. 
  

	 	10.	 MISCELLANEOUS. 

a.    Any notices, consents, waivers or other communications required or permitted to be given under the terms of this
Agreement must be in writing and will be deemed to have been delivered: (i) upon receipt, when delivered personally; (ii) upon receipt, when sent by facsimile (provided confirmation of transmission is mechanically or electronically
generated and kept on file by the sending party); (iii) upon receipt, when sent by electronic message (provided the recipient responds to the message and confirmation of both electronic messages are kept on file by the sending party); or
(iv) one (1) Business Day after timely deposit with a nationally recognized overnight delivery service, in each case properly addressed to the party to receive the same. The addresses and facsimile numbers for such communications shall be: 

If to the Company: 
 Curis, Inc.

 (Address prior to April 1, 2020) 

4 Maguire Road 
 Lexington, MA
02421 
 (Address as of April 1, 2020) 

128 Spring Street 
 Lexington, MA
02421 

Telephone:        
617-503-6500 

Facsimile:         
617-503-6501 
 Attention:         Bill Steinkrauss, CFO 

Email:               [**] 

 With a copy (which shall not constitute notice) to: 

Wilmer Cutler Pickering Hale and Dorr LLP 

60 State Street 
 Boston, MA 02109

 Telephone:
        617-526-6000 

Facsimile:         (617) 526-5000 

Attention:         Cynthia T. Mazareas, Esq. 

Email:               [**] 

If to the Buyer: 
 Aspire
Capital Fund, LLC 
 155 North Wacker Drive, Suite 1600 

Chicago, IL 60606 
 Telephone:        312-658-0400 

Facsimile:         312-658-4005 

Attention:         Steven G. Martin 

Email:               [**] 

With a copy (which shall not constitute notice) to: 

Morrison & Foerster LLP 

2000 Pennsylvania Avenue, NW, Suite 6000 

Washington, DC 20006 
 Telephone:        202-778-1611 

Facsimile:         
202-887-0763 
 Attention:         Martin P. Dunn, Esq. 

Email:               [**] 

or at such other address and/or facsimile number and/or to the attention of such other person as the recipient party has specified by written notice given to
each other party at least one (1) Business Day prior to the effectiveness of such change. Written confirmation of receipt (A) given by the recipient of such notice, consent, waiver or other communication, (B) mechanically or
electronically generated by the sender’s facsimile machine containing the time, date, and recipient facsimile number, (C) electronically generated by the sender’s electronic mail containing the time, date and recipient email address
or (D) provided by a nationally recognized overnight delivery service, shall be rebuttable evidence of receipt in accordance with clause (i), (ii), (iii) or (iv) above, respectively. Any party to this Agreement may give any notice or other
communication hereunder using any other means (including messenger service, ordinary mail or electronic mail), but no such notice or other communication shall be deemed to have been duly given unless it actually is received by the party for whom it
is intended. 
 b.    No failure or delay in the exercise of any power, right or privilege hereunder shall operate as a
waiver thereof, nor shall any single or partial exercise of any such power, right or privilege preclude other or further exercise thereof or of any other right, power or privilege. 

c.    The corporate laws of the State of Delaware shall govern all issues concerning the relative rights of the Company
and its stockholders. All other questions concerning the construction, validity, enforcement and interpretation of this Agreement shall be governed by the internal laws of the State of Illinois, without giving effect to any choice of law or conflict
of law provision or rule (whether of 

 
the State of Illinois or any other jurisdictions) that would cause the application of the laws of any jurisdictions other than the State of Illinois. Each party hereby irrevocably submits to the
exclusive jurisdiction of the state and federal courts sitting in the City of Chicago for the adjudication of any dispute hereunder or in connection herewith or with any transaction contemplated hereby or discussed herein, 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 brought in an inconvenient forum or that the venue of such
suit, action or proceeding is improper. 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 to such party at the address for such
notices to it under this Agreement and agrees that such service shall constitute good and sufficient service of process and notice thereof. Nothing contained herein shall be deemed to limit in any way any right to serve process in any manner
permitted by law. If any provision of this Agreement shall be invalid or unenforceable in any jurisdiction, such invalidity or unenforceability shall not affect the validity or enforceability of the remainder of this Agreement in that jurisdiction
or the validity or enforceability of any provision of this Agreement in any other jurisdiction. EACH PARTY HEREBY IRREVOCABLY WAIVES ANY RIGHT IT MAY HAVE, AND AGREES NOT TO REQUEST, A JURY TRIAL FOR THE ADJUDICATION OF ANY DISPUTE HEREUNDER OR
IN CONNECTION HEREWITH OR ARISING OUT OF THIS AGREEMENT OR ANY TRANSACTION CONTEMPLATED HEREBY. 
 d.    This
Agreement, the Purchase Agreement and the other Transaction Documents constitute the entire understanding among the parties hereto with respect to the subject matter hereof and thereof. There are no restrictions, promises, warranties or
undertakings, other than those set forth or referred to herein and therein. This Agreement, the Purchase Agreement and the other Transaction Documents supersede all other prior oral or written agreements between the Buyer, the Company,
their affiliates and persons acting on their behalf with respect to the subject matter hereof and thereof. 

e.    Subject to the requirements of Section 8, this Agreement shall inure to the benefit of and be binding upon the
permitted successors and assigns of each of the parties hereto. 
 f.    The headings in this Agreement are for
convenience of reference and shall not form part of, or affect the interpretation of, this Agreement. 
 g.    This
Agreement may be executed in two or more identical counterparts, all of which 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; provided that
a facsimile or pdf (or other electronic reproduction of a) signature shall be considered due execution and shall be binding upon the signatory thereto with the same force and effect as if the signature were an original, not a facsimile or pdf (or
other electronic reproduction of a) signature. 
 h.    Each party shall do and perform, or cause to be done and
performed, all such further acts and things, and shall execute and deliver all such other agreements, certificates, instruments and documents as the other party may reasonably request in order to carry out the intent and accomplish the purposes of
this Agreement and the consummation of the transactions contemplated hereby. 
 i.    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. 

 j.    This Agreement is intended for the benefit of the parties hereto
and their respective permitted successors and assigns, and is not for the benefit of, nor may any provision hereof be enforced by, any other Person. 

* * * * * * 

 IN WITNESS WHEREOF, the parties have caused this Registration Rights Agreement to be
duly executed as of day and year first above written. 
  

			
	THE COMPANY:
	
	CURIS, INC.
		
	By:	 	/s/ James E. Dentzer
	Name:	 	James E. Dentzer
	Title:	 	President and Chief Executive Officer
	
	BUYER:
	
	ASPIRE CAPITAL FUND, LLC
	BY: ASPIRE CAPITAL PARTNERS, LLC
	BY: SGM HOLDINGS CORP.
		
	By:	 	/s/ Steven G. Martin
	Name:	 	Steven G. Martin
	Title:	 	President

 EXHIBIT A 

Information About The Buyer Furnished To The Company By The Buyer 

Expressly For Use In Connection With The Registration Statement and Prospectus 

Aspire Capital Partners LLC (“Aspire Partners”) is the Managing Member of Aspire Capital Fund, LLC (“Aspire Fund”). SGM Holdings Corp
(“SGM”) is the Managing Member of Aspire Partners. Mr. Steven G. Martin (“Mr. Martin”) is the president and sole shareholder of SGM, as well as a principal of Aspire Partners. Mr. Erik J. Brown
(“Mr. Brown”) is the president and sole shareholder of Red Cedar Capital Corp (“Red Cedar”), which is a principal of Aspire Partners. Mr. Christos Komissopoulos (“Mr. Komissopoulos”) is president and sole
shareholder of Chrisko Investors Inc. (“Chrisko”), which is a principal of Aspire Partners. Mr. William F. Blank, III (“Mr. Blank”) is president and sole shareholder of WML Ventures Corp. (“WML
Ventures”), which is a principal of Aspire Partners. Each of Aspire Partners, SGM, Red Cedar, Chrisko, WML Ventures, Mr. Martin, Mr. Brown, Mr. Komissopoulos and Mr. Blank may be deemed to be a beneficial owner of common
stock held by Aspire Fund. Each of Aspire Partners, SGM, Red Cedar, Chrisko, WML Ventures, Mr. Martin, Mr. Brown, Mr. Komissopoulos and Mr. Blank disclaims beneficial ownership of the common stock held by Aspire Fund.

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