Document:

EX-10.10

 Exhibit 10.10 

SALARIUS PHARMACEUTICALS, LLC 

RESTRICTED UNIT AWARD AGREEMENT 

THIS RESTRICTED UNIT AWARD AGREEMENT (this “Agreement”) is dated as of January 21, 2017 (the “Grant
Date”), by and between Salarius Pharmaceuticals, LLC, a Delaware limited liability company (the “Company”), and Scott Jordan (the “Grantee”). 

WITNESSETH 
 WHEREAS, the
Grantee has been retained as a service provider to the Company; 
 WHEREAS, the Company desires to encourage and enable persons, upon whose
judgment, initiative and efforts the Company largely depends for the successful conduct of its business, to acquire an interest in the prospective profits and capital appreciation of the Company, in order to assure a closer identification of their
interests with those of the Company, stimulate their efforts on the Company’s behalf and strengthen their desire to remain with the Company; and 

WHEREAS, for the foregoing reasons, the Company desires to grant the Restricted Units (defined below) to Grantee on the terms and subject to
the conditions set forth herein, and Grantee desires to acquire said Restricted Units on such terms. 
 NOW, THEREFORE, in consideration of
the promises set forth herein and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, and intending to be legally bound, the parties hereto agree as follows: 

1.    Award of Units. The Company hereby grants to the Grantee a total of 239 Profits Interest Common Units of the
Company (the “Restricted Units”). The rights, privileges, limitations and obligations of the Restricted Units are set forth in the Amended and Restated Limited Liability Company Agreement of the Company effective
January 1, 2015, as it may be amended and/or restated from time to time (the “LLC Agreement”), and are subject to the further terms and conditions set forth in this Agreement. In the event of any conflict between the LLC
Agreement and this Agreement, the terms of the LLC Agreement shall control. By executing this Agreement in the space provided on the signature page below, the Grantee acknowledges receipt of a fully executed copy of the LLC Agreement. The Restricted
Units are subject to a substantial risk of forfeiture, vesting as provided herein, and as set forth in the LLC Agreement will participate to the extent provided in the LLC Agreement in the future appreciation in the value of the Company above the
fair market value of the Company as of the Grant Date, which is $11,000,000. The Restricted Units are intended to be Profits Interest Units as defined in the LLC Agreement. 

2.    Closing. The issuance of the Restricted Units (the “Closing”) shall occur
simultaneously with the execution and delivery of this Agreement by Grantee and the Company. At the Closing, the Company shall issue or otherwise memorialize the issuance to Grantee of the Restricted Units. The date of the Closing is hereinafter
referred to as the “ Grant Date.” 
 3.    Vesting. The Restricted Units shall not become
Vested Units except as and to the extent provided for in Section 3(a) below. Until such time as the Restricted Units become Vested Units, they shall be subject to forfeiture in accordance with the provisions of Section 3(b) below. 

 (a)    Except as otherwise provided in subsection (b) of this
Section 3, the Restricted Units granted pursuant to this Agreement shall become ““Vested Units’’ as follows: the vesting commencement date for the Restricted Units shall be January 1, 2017 (the “Vesting
Commencement Date”). 29 of the Restricted Units shall vest on the Vesting Commencement Date, and 15 of the Restricted Units shall vest on the last day of each Quarter thereafter so that all of the Restricted Units shall have vested and
been released from restrictions as of June 30, 2020, subject to Grantee continuing to have a Service Relationship with the Company through each such date. “Quarter” for the purposes herein shall refer to the following
quarter system (each period, a Quarter): January 1—March 31; April 1—June 30; July 1—September 30; October 1—December 31. 

(b)    In the event that Grantee’s Service Relationship is terminated for any reason then Grantee shall
automatically, and without the requirement for any action on the part of the Company or the Grantee, forfeit all Restricted Units which are not at such time Vested Units; and all such Restricted Units which are not Vested Units at the time of such
forfeiture shall be deemed to have been tendered to the Company by Grantee for cancellation and cancelled by the Company, in each case without the requirement for any action on the part of the Company or Grantee to effect such deemed tender and
cancellation. The Company shall have no obligation to make any payment to Grantee as a result of any such forfeiture and cancellation of Restricted Units; and the Company shall be entitled, without the requirement of any action on the part of
Grantee, to record the cancellation of the forfeited Restricted Units on the records of the Company. 
 (c)    Upon the
occurrence of a Change of Control (as defined below) or a Distribution (as defined below) while Grantee remains in Grantee’s Service Relationship, then the Restricted Units shall vest as to 100% of the Restricted Units. 

(d)    For purposes of this Agreement, the following terms shall have the meanings set forth below: 

(i)    “Change of Control” shall mean the first to occur of: (X) any third
party (or affiliated third parties), becomes a beneficial owner of securities of the Company representing more than 50% of the voting power of the then- outstanding securities of the Company; (Y) upon the consummation of a merger or
consolidation of the Company with another entity where the equity owners of the Company, immediately prior to the merger or consolidation, will beneficially own, immediately after the merger or consolidation, equity ownership entitling such persons
to less than 50% of all votes to which all equity owners of the surviving entity would be entitled in the election of directors or managers, or (Z) a sale or other disposition of all or substantially all of the assets of the Company. For the
avoidance of doubt, Change in Control excludes any transaction designed to be a financing transaction for the Company or to raise money for the continuing operations of the company, even if such financing transaction results in a Change of Control.

 (ii)    “Distribution” means distributions to the Company’s Members
which, in the aggregate, exceed $8,000,000. 
 (iii)    “Service Relationship”
shall mean Grantee’s employment with or contractual service to the Company or its subsidiaries or affiliates, whether in the capacity of an employee, officer, director, manager, advisor or independent contractor. Unless otherwise determined by
the Company’s Board of Managers, Grantee’s Service Relationship shall not be deemed to have terminated merely because of a change in the capacity in which Grantee renders service to the Company, its subsidiaries or affiliates, or a
transfer between the Company and any subsidiary or affiliate, provided that there is no interruption or other termination of the Service Relationship. Subject to the foregoing, the Company’s Board of Managers, in its discretion, shall
determine whether Grantee’s Service Relationship has terminated and the effective date of such termination. 

  

			
	 	 
	 SALARIUS PHARMACEUTICALS, LLC
 RESTRICTED UNIT
AWARD AGREEMENT
	  	PAGE 2

 4.    To the extent any portion of the Restricted Units granted under
this Agreement have become Vested Units as provided above, such Vested Units will thereafter be free of the forfeiture provisions of this Agreement; provided, that all Vested Units shall at all times remain subject to the terms, conditions,
restrictions and limitations set forth from time to time in the LLC Agreement, including without limitation any applicable rights of repurchase set forth in the LLC Agreement. 

5.    Restrictions on Transfer. Except as otherwise provided for in the LLC Agreement, Grantee may not, directly or
indirectly, by operation of law or otherwise, voluntarily or involuntarily, alienate, attach, sell, assign, pledge, hypothecate, encumber, mortgage, charge or otherwise transfer any of the unvested Restricted Units granted hereunder or any interest
therein, except with the prior written consent of the Company, which may be granted or withheld in the Company’s sole discretion. It is understood that the Company shall not agree to any such transfers during the first two years from and after
the Grant Date. 
 6.    Restrictive Legend. In addition to any other restrictions on terms of transfer set forth
herein or in the LLC Agreement, Grantee acknowledges that the Restricted Units granted hereunder have not been registered under the Securities Act of 1933, as amended (the “Securities Act”), or applicable state securities
laws, and may not be offered, sold, assigned, pledged or otherwise transferred in the absence of an effective registration statement under the Securities Act covering such transfer or an opinion of counsel satisfactory to the Company that
registration under the Securities Act is not required. In the event that certificates evidencing the Restricted Units are issued, such certificates shall bear a legend substantially in the form set forth below: 

“The transferability of this certificate and the Membership Units represented hereby are subject to the restrictions,
terms, and conditions (including restrictions on transfers) contained in (1) a certain Restricted Unit Award Agreement between the Company and the holder of record of this certificate, and (2) the LLC Agreement of the Company from time to
time in effect, copies of which are available at the offices of the Company for examination.” 

7.    Withholding Taxes and Section 83(b) Election. The Company shall withhold from
distributions to Grantee any federal, state or local taxes payable with respect to the grant under this Agreement of the Restricted Units; it is anticipated that this amount will be $0.00. As a condition to the grant of the Restricted Units, Grantee
hereby agrees to file a Section 83(b) election with the Internal Revenue Service no later than 30 days after the Grant Date. If such election is not filed, the Company shall have the option to declare this Agreement, and the issuance of the
Restricted Units hereunder, void. The form for making this election is attached hereto as Exhibit A. 

  

			
	 	 
	 SALARIUS PHARMACEUTICALS, LLC
 RESTRICTED UNIT
AWARD AGREEMENT
	  	PAGE 3

 8.    Miscellaneous. 

(a)    Upon registration of the Restricted Units in Grantee’s name, and the execution and delivery by Grantee of this
Agreement, Grantee shall have, subject to the terms of this Agreement and the LLC Agreement, all of the rights and duties of, and status as, a holder of Profits Interest Common Units of the Company in respect of the Restricted Units. By executing
this Agreement, Grantee is agreeing to be bound by all of the terms and conditions of the LLC Agreement. 
 (b)    The
grant of Restricted Units does not confer upon Grantee any right to continue any Service Relationship with the Company or any Subsidiary or Company Affiliate thereof, and the Grantee shall remain subject to disciplinary action, including, but not
limited to, discharge, to the same extent as if this instrument had never been executed. Nothing contained herein shall be construed as a contract of employment or other Service Relationship. 

(c)    This Agreement shall be governed by the laws of the State of Delaware, without regard to the conflict of laws
provisions thereof. Each of the Company and Grantee agrees to submit to the jurisdiction of the state and Federal courts located in the State of Texas and agree that venue properly lies in the State of Texas. 

(d)    This Agreement, together with the LLC Agreement, expresses the entire agreement and understanding of the Company
and Grantee with respect to the subject matter hereof and supersedes all prior oral or written agreements, commitments and understandings pertaining to the subject matter hereof. This Agreement may not be orally changed, modified or terminated, nor
shall any oral waiver of any of its terms be effective. This Agreement may be changed, modified or terminated only by an agreement in writing signed by the Company and Grantee. 

(f)    If any provision(s) of this Agreement shall be determined to be illegal or unenforceable, such determination shall
in no manner affect the legality or enforceability of any other provision hereof, and any such illegal or unenforceable provision shall be construed as narrowly as possible in order to enforce to maximum extent permitted, the remainder of this
Agreement. 
 (g)    All notices, requests, consents and other communications shall be in writing and be deemed given
when delivered personally, by telex or facsimile transmission or when received if mailed by a nationally recognized overnight carrier or by first class registered or certified mail, postage prepaid. Notices to the Company shall be addressed to its
principal offices. Notices to Grantee shall be delivered to the address set forth underneath Grantee’s signature below, or to such other address or addresses as subsequently be furnished by such party in writing to the other. 

(h)    This Agreement shall be binding upon and shall inure to the benefit of the parties hereto, their respective
successors, assigns, legal representatives, estates, executors, administrators and heirs. The Company has the right to assign this Agreement, and such assignee shall become entitled to all the rights of the Company hereunder to the extent of such
assignment. 
 (i)    This Agreement is subject to all of the terms, conditions and limitations set forth in the LLC
Agreement. 
 [Signature Page Follows] 

  

			
	 	 
	 SALARIUS PHARMACEUTICALS, LLC
 RESTRICTED UNIT
AWARD AGREEMENT
	  	PAGE 4

 SIGNATURE PAGE 

IN WITNESS WHEREOF, the parties have caused this Restricted Unit Award Agreement to be effective as of the day and year first above written.

  

			
	SALARIUS PHARMACEUTICALS, LLC
		
	By:	 	/s/ David Arthur
		
	Name:	 	David Arthur
		
	Title:	 	Chief Executive Officer

  

			
	GRANTEE
		
	By:	 	/s/ Scott Jordan
	Name:	 	Scott Jordan
	
	Address:

  

  

			
	 	 
	 SALARIUS PHARMACEUTICALS, LLC
 RESTRICTED UNIT
AWARD AGREEMENT
	  	PAGE 5

 PROTECTIVE IRC SECTION 83(B) ELECTION 

The undersigned taxpayer hereby protectively elects pursuant to Section 83(b) of the Internal Revenue Code of 1986, as amended, to include
in the undersigned’s gross income for the 2017 taxable year the excess (if any) of the fair market value of the property described below, over the amount the undersigned paid for such property, and supplies herewith the following information in
compliance with the Treasury regulations promulgated under Section 83(b): 
 1.    The undersigned’s name, address and
taxpayer identification (social security) number are: 
  

									
		  	Name:	  		  	 	  	
		  	Address:	  		  	 	  	
		  	Social Security Number:	  	 	  	

 2.    The property with respect to which the election is made consists of ______________ of Salarius
Pharmaceuticals, LLC, a Delaware limited liability company (the “Company”). 
 3.    The effective date on which
the units were transferred to the undersigned was _____________, the date of the imposition on the units of restrictions constituting a substantial risk of forfeiture was _____________, and the taxable year to which this election relates is the year
ending _____________. 
 4.    The Company has a right of first refusal with respect to any proposed transfer of the units. If the
taxpayer‘s employment with the Company is terminated, the taxpayer must sell any unvested units back to the Company at an aggregate purchase price of $_____________. 

5.    The fair market value of the units at the time of transfer (determined without regard to any restrictions other than those which by
their terms will never lapse) is an aggregate price of $_____________. 
 6.    The amount paid for the units by the undersigned is an
aggregate price of $_____________. 
 7.    A copy of this election has been furnished to the Company. 

 

											
	Date:	  	 	  		  		  	By:EX-10.11

 Exhibit 10.11 

SALARIUS PHARMACEUTICALS, LLC 

RESTRICTED UNIT AWARD AGREEMENT 

THIS RESTRICTED UNIT AWARD AGREEMENT (this “Agreement”) is dated as of January 21, 2017 (the “Grant
Date”), by and between Salarius Pharmaceuticals, LLC, a Delaware limited liability company (the “Company”), and Jonathan P. Northrup (the “Grantee”). 

WITNESSETH 
 WHEREAS, the
Grantee and the Company have executed that certain Manager Agreement entered into on January 21, 2017 (the “Manager Agreement”) and that certain consultant agreement entered into on December 21, 2016 (the
“Consultant Agreement”); and 
 WHEREAS, the Company has agreed to issue Restricted Units to the Grantee in
connection with his provision of services under the Manager Agreement; and 
 WHEREAS, for the foregoing reasons, the Company desires to
grant the Restricted Units (defined below) to the Grantee on the terms and subject to the conditions set forth herein, and the Grantee desires to acquire said Restricted Units on such terms. 

NOW, THEREFORE, in consideration of the promises set forth herein and other good and valuable consideration, the receipt and sufficiency of
which are hereby acknowledged, and intending to be legally bound, the parties hereto agree as follows: 
 1.    Award
of Units. The Company hereby grants to the Grantee a total of 72 Profits Interest Common Units of the Company (the “Restricted Units”). The rights, privileges, limitations and obligations of the Restricted Units are set
forth in the Amended and Restated Limited Liability Company Agreement of the Company effective January 1, 2015, as it may be amended and/or restated from time to time (the “LLC Agreement”), and are subject to the further
terms and conditions set forth in this Agreement. In the event of any conflict between the LLC Agreement and this Agreement, the terms of the LLC Agreement shall control. By executing this Agreement in the space provided on the signature page below,
the Grantee acknowledges receipt of a fully executed copy of the LLC Agreement. The Restricted Units are subject to a substantial risk of forfeiture, vesting as provided herein, and as set forth in the LLC Agreement will participate to the extent
provided in the LLC Agreement in the future appreciation in the value of the Company above the fair market value of the Company as of the Grant Date, which is $11,000,000. The Restricted Units are intended to be Profits Interest Units as defined in
the LLC Agreement. 
 2.    Closing. The issuance of the Restricted Units (the “Closing”)
shall occur simultaneously with the execution and delivery of this Agreement by Grantee and the Company. At the Closing, the Company shall issue or otherwise memorialize the issuance to Grantee of the Restricted Units. The date of the Closing is
hereinafter referred to as the “Grant Date” 
 3.    Vesting. The Restricted Units shall
not become Vested Units except as and to the extent provided for in Section 3(a) below. Until such time as the Restricted Units become Vested Units, they shall be subject to forfeiture in accordance with the provisions of Section 3(b)
below. 

 (a)    Except as otherwise provided in subsection (b) of this
Section 3, the Restricted Units granted pursuant to this Agreement shall become “Vested Units” as follows: The vesting commencement date for the Restricted Units shall be January 1, 2017 (the “Vesting
Commencement Date”). On the first day of each month following the Vesting Commencement Date, two (2) Restricted Units shall vest, so that all of the Restricted Units shall have vested and been released from restrictions as of
January 1, 2019, subject to Grantee continuing to have a Service Relationship (as defined below) with the Company through each such date; provided, however, that the monthly vesting set forth herein shall continue for up to an additional twelve
(12) months following Grantee’s termination of his Service Relationship if Grantee remains in compliance with the surviving provisions of the Consultant Agreement and/or any other contractual agreement governing the provision of
Grantee’s services to the Company in effect at such applicable time (together the “Contractual Agreements”), including without limitation, the requirements of Section 7, Restricted Activities, of the Consultant
Agreement. 
 (b)    In the event that (A) Grantee is no longer in compliance with the surviving provisions of the
Contractual Agreements or (B) Grantee’s Service Relationship is terminated for any reason, then Grantee shall automatically, and without the requirement for any action on the part of the Company or the Grantee, forfeit all Restricted Units
which are not at such time Vested Units; and all such Restricted Units which are not Vested Units at the time of such forfeiture shall be deemed to have been tendered to the Company by Grantee for cancellation and cancelled by the Company, in each
case without the requirement for any action on the part of the Company or Grantee to effect such deemed tender and cancellation. The Company shall have no obligation to make any payment to Grantee as a result of any such forfeiture and cancellation
of Restricted Units; and the Company shall be entitled, without the requirement of any action on the part of Grantee, to record the cancellation of the forfeited Restricted Units on the records of the Company. 

(c)    Upon the occurrence of a Change of Control (as defined below) or a Distribution (as defined below) while Grantee
remains in Grantee’s Service Relationship, then the Restricted Units shall vest as to 100% of the Restricted Units. 

(d)    For purposes of this Agreement, the following terms shall have the meanings set forth below: 

(i)    “Change of Control” shall mean the first to occur of: (X) any third
party (or affiliated third parties), becomes a beneficial owner of securities of the Company representing more than 50% of the voting power of the then-outstanding securities of the Company; (Y) upon the consummation of a merger or
consolidation of the Company with another entity where the equity owners of the Company, immediately prior to the merger or consolidation, will beneficially own, immediately after the merger or consolidation, equity ownership entitling such persons
to less than 50% of all votes to which all equity owners of the surviving entity would be entitled in the election of directors or managers, or (Z) a sale or other disposition of all or substantially all of the assets of the Company. For the
avoidance of doubt. Change in Control excludes any transaction designed to be a financing transaction for the Company or to raise money for the continuing operations of the company, even if such financing transaction results in a Change of Control.

  
 2 

 (ii)    “Distribution” means
distributions to the Company’s Members which in the aggregate, exceed $8,000,000. 

(iii)    “Service Relationship” shall mean Grantee’s contractual service as a
member of the Company’s Board of Mangers (or the successor governing body thereto), whether as a voting or non-voting member. Subject to the foregoing, the Company’s Board of Managers, in its
discretion, shall determine whether Grantee’s Service Relationship has terminated and the effective date of such termination. 

4.    To the extent any portion of the Restricted Units granted under this Agreement have become Vested Units as provided
above, such Vested Units will thereafter be free of the forfeiture provisions of this Agreement; provided, that all Vested Units shall at all times remain subject to the terms, conditions, restrictions and limitations set forth from time to
time in the LLC Agreement, including without limitation any applicable rights of repurchase set forth in the LLC Agreement. 

5.    Restrictions on Transfer. Except as otherwise provided for in the LLC Agreement, Grantee may not, directly or
indirectly, by operation of law or otherwise, voluntarily or involuntarily, alienate, attach, sell, assign, pledge, hypothecate, encumber, mortgage, charge or otherwise transfer any of the unvested Restricted Units granted hereunder or any interest
therein, except with the prior written consent of the Company, which may be granted or withheld in the Company’s sole discretion. It is understood that the Company shall not agree to any such transfers during the first two years from and after
the Grant Date. 
 6.    Restrictive Legend. In addition to any other restrictions on terms of transfer set forth
herein or in the LLC Agreement. Grantee acknowledges that the Restricted Units granted hereunder have not been registered under the Securities Act of 1933, as amended (the “Securities Act”), or applicable state securities
laws, and may not be offered, sold, assigned, pledged or otherwise transferred in the absence of an effective registration statement under the Securities Act covering such transfer or an opinion of counsel satisfactory to the Company that
registration under the Securities Act is not required. In the event that certificates evidencing the Restricted Units are issued, such certificates shall bear a legend substantially in the form set forth below:     

“The transferability of this certificate and the Membership Units represented hereby are subject to the restrictions,
terms, and conditions (including restrictions on transfers) contained in (1) a certain Restricted Unit Award Agreement between the Company and the holder of record of this certificate, and (2) the LLC Agreement of the Company from time to
time in effect, copies of which are available at the offices of the Company for examination.” 

7.    Withholding Taxes and Section 83(b) Election. The Company shall withhold from
distributions to Grantee any federal, state or local taxes payable with respect to the grant under this Agreement of the Restricted Units; it is anticipated that this amount will be $0.00. As a condition to the grant of the Restricted Units, Grantee
hereby agrees to file a Section 83(b) election with the Internal Revenue Service no later than 30 days after the Grant Date. If such election is not filed, the Company shall have the option to declare this Agreement, and the issuance of the
Restricted Units hereunder, void. The form for making this election is attached hereto as Exhibit A. 

  
 3 

 8.    Miscellaneous. 

(a)    Upon registration of the Restricted Units in Grantee’s name, and the execution and delivery by Grantee of this
Agreement, Grantee shall have, subject to the terms of this Agreement and the LLC Agreement, all of the rights and duties of, and status as, a holder of Profits Interest Common Units of the Company in respect of the Restricted Units. By executing
this Agreement, Grantee is agreeing to be bound by all of the terms and conditions of the LLC Agreement. 
 (b)    The
grant of Restricted Units does not confer upon Grantee any right to continue any Service Relationship with the Company or any Subsidiary or Company Affiliate thereof, and the Grantee shall remain subject to disciplinary action, including, but not
limited to, discharge, to the same extent as if this instrument had never been executed. Nothing contained herein shall be construed as a contract of employment or other Service Relationship. 

(c)    This Agreement shall be governed by the laws of the State of Delaware, without regard to the conflict of laws
provisions thereof. Each of the Company and Grantee agrees to submit to the jurisdiction of the state and Federal courts located in the State of Texas and agree that venue properly lies in the State of Texas. 

(d)    This Agreement, together with the LLC Agreement, expresses the entire agreement and understanding of the Company
and Grantee with respect to the subject matter hereof and supersedes all prior oral or written agreements, commitments and understandings pertaining to the subject matter hereof. This Agreement may not be orally changed, modified or terminated, nor
shall any oral waiver of any of its terms be effective. This Agreement may be changed, modified or terminated only by an agreement in writing signed by the Company and Grantee.     

(f)    If any provision(s) of this Agreement shall be determined to be illegal or unenforceable, such determination shall
in no manner affect the legality or enforceability of any other provision hereof, and any such illegal or unenforceable provision shall be construed as narrowly as possible in order to enforce to maximum extent permitted, the remainder of this
Agreement. 
 (g)    All notices, requests, consents and other communications shall be in writing and be deemed given
when delivered personally, by telex or facsimile transmission or when received if mailed by a nationally recognized overnight carrier or by first class registered or certified mail, postage prepaid. Notices to the Company shall be addressed to its
principal offices. Notices to Grantee shall be delivered to the address set forth underneath Grantee’s signature below, or to such other address or addresses as subsequently be furnished by such party in writing to the other. 

(h)    This Agreement shall be binding upon and shall inure to the benefit of the parties hereto, their respective
successors, assigns, legal representatives, estates, executors, administrators and heirs. The Company has the right to assign this Agreement, and such assignee shall become entitled to all the rights of the Company hereunder to the extent of such
assignment. 
 (i)    This Agreement is subject to all of the terms, conditions and limitations set forth in the LLC
Agreement. 
 [Signature Page Follows] 

  
 4 

 SIGNATURE PAGE 

IN WITNESS WHEREOF, the parties have caused this Restricted Unit Award Agreement to be effective as of the day and year first above written.

  

			
	SALARIUS PHARMACEUTICALS, LLC
		
	By:	 	/s/ David Arthur
		
	Name:	 	David Arthur
		
	Title:	 	Chief Executive Officer

  
  

			
	GRANTEE
		
	By:	 	/s/ Jonathan P. Northrup
		
	Name:	 	Jonathan P. Northrup
		
	Address:	 	

  
 5 

 PROTECTIVE IRC SECTION 83(B) ELECTION 

The undersigned taxpayer hereby protectively elects pursuant to Section 83(b) of the Internal Revenue Code of 1986, as amended, to
include in the undersigned’s gross income for the 2017 taxable year the excess (if any) of the fair market value of the property described below, over the amount the undersigned paid for such property, and supplies herewith the following
information in compliance with the Treasury regulations promulgated under Section 83(b): 
 1.     The undersigned’s name,
address and taxpayer identification (social security) number are: 
  

									
					
		  	Name:	  		  	 	  	
					
		  	Address:	  		  	 	  	
				
		  	Social Security Number:	  	 	  	

 2.    The property with respect to which the election is made consists of ______________ of Salarius
Pharmaceuticals, LLC, a Delaware limited liability company (the “Company”). 
 3.    The effective date on which
the units were transferred to the undersigned was _____________, the date of the imposition on the units of restrictions constituting a substantial risk of forfeiture was _____________, and the taxable year to which this election relates is the year
ending _____________. 
 4.    The Company has a right of first refusal with respect to any proposed transfer of the units. If the
taxpayer‘s employment with the Company is terminated, the taxpayer must sell any unvested units back to the Company at an aggregate purchase price of $_____________. 

5.    The fair market value of the units at the time of transfer (determined without regard to any restrictions other than those which by
their terms will never lapse) is an aggregate price of $_____________. 
 6.    The amount paid for the units by the undersigned is an
aggregate price of $_____________. 
 7.    A copy of this election has been furnished to the Company. 

 

													
	Date:	  	 	  		  		  		  	By:

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