Exhibit 10.15


 


[***]
CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL
TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS. ASTERISKS DENOTE SUCH OMISSIONS.


 


 


 



FIRST
AMENDMENT

TO

AMENDED AND RESTATED LIMITED PARTNERSHIP AGREEMENT

of

HOLMDEL PHARMACEUTICALS, L.P.


THIS FIRST AMENDMENT
TO AMENDED AND RESTATED LIMITED PARTNERSHIP AGREEMENT OF HOLMDEL PHARMACEUTICALS, L.P. (this “Amendment”) is
effective as of the 20th day of December 2012 (the “Effective Date”), by and among HP GENERAL PARTNER,
LLC, a Delaware limited liability company (the “General Partner”), SWK HP HOLDINGS, LP, a Delaware limited partnership
(“SWK”), and HOLMDEL THERAPEUTICS, LLC, a Delaware limited liability company (“HT” and, together
with SWK, individually referred to as a “Limited Partner” and collectively referred to as the “Limited
Partners”).


W I T
N E S S E T H:


WHEREAS, Holmdel
Pharmaceuticals, L.P., a Delaware limited partnership (the “Partnership”) was formed pursuant to a certificate
of limited partnership, filed with the Secretary of State of the State of Delaware on December 12, 2012 pursuant to the Delaware
Revised Uniform Limited Partnership Act (as amended from time to time, the “Act”);


WHEREAS, the General
Partner and the Limited Partners entered into an Amended and Restated Limited Partnership Agreement of the Partnership, dated as
of December 20, 2012 (the “Restated Partnership Agreement”), to establish the rights, obligations and preferences
of the Partners and provide for other matters as set forth therein; and


WHEREAS, the General
Partner recommends that certain incentives be provided to certain members of HT in connection with their performance of services
which directly or indirectly benefit the Partnership, and in connection therewith, the Limited Partners have agreed that up to
a 12.5% Partner Percentage will be reallocated in increments over time to HT (each an “Incremental Incentive Percentage”),
with the Limited Partners’ respective Partner Percentages correspondingly reduced at such times (on a pro rata basis, based
upon their respective Partner Percentages as of the date of each incremental change) by the amount of each such Incremental Incentive
Percentage reallocated to HT; and


WHEREAS, the General
Partner and the Limited Partners desire to enter into this Amendment to amend certain terms of the Restated Partnership Agreement.


NOW, THEREFORE,
in consideration of the premises and the obligations herein assumed by the respective parties, it is agreed by and among the parties
as follows:


1.                 
All capitalized terms used but not otherwise defined in this Amendment shall have the meanings given to them in the Restated
Partnership Agreement.


2.                 
The Restated Partnership Agreement is hereby amended as follows:






    	 



    	 



    

(a)               
Section 1.01 is hereby amended to add the following definition:


“HT”
means Holmdel Therapeutics, LLC, a Delaware limited liability company, together with its Permitted Transferees.”


(b)              
Section 1.01 is hereby further amended to delete the definition of “JK”. All references in the Restated
Partnership Agreement to “JK” shall hereafter be deemed to refer to HT.


(c)               
Section 1.01 is hereby further amended to delete the definition of “Partner Schedule” and replace it
with the following definition:


“Partner
Schedule” means the schedule listing the name, address, Capital Contribution, Partner Percentage and date of admission
of each Partner, attached hereto as Schedule A, as the same may be amended from time to time by the General Partner.”


(d)              
The Partner Schedule attached to the Restated Partnership Agreement is replaced by the Partner Schedule attached hereto
as Schedule A.


3.                 
In the event any of the terms of this Amendment conflict with the terms of the Restated Partnership Agreement, the terms
of this Amendment shall prevail.


4.                 
Except as expressly modified in this Amendment, the Restated Partnership Agreement shall remain in full force and effect
without any amendments, modifications or alterations.


5.                 
This Amendment shall be binding upon, and inures to the benefit of, the heir, successor, assign, executor, administrator,
committee, guardian, conservator or trustee of any Partner.


6.                 
This Amendment shall be governed by, and construed in accordance with, applicable federal laws and the laws of the State
of Delaware (without giving effect to conflict of laws principles).


7.                 
This Amendment may be executed in more than one counterpart, each of which shall be deemed an original but all of which
shall constitute one and the same instrument, with the same effect as if the parties executed one counterpart as of the day and
year first above written on this Amendment; provided, however, that each separate counterpart must be executed by the General Partner.






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IN WITNESS WHEREOF,
the parties hereto have duly executed this First Amendment to Amended and Restated Limited Partnership Agreement as of the Effective
Date.





	 	GENERAL PARTNER:
	 	 	 	 	 
	 	HP GENERAL PARTNER,
LLC
	 	 	 	 	 
	 	By: 	/s/ Brett Pope	 
	 	 	Name: 	Brett Pope	 
	 	 	Title: 	Manager	 
	 	 	 	 	 
	 	 	 	 	 
	 	LIMITED PARTNERS:
	 	 	 	 	 
	 	SWK HP HOLDINGS
LP
	 	 	 	 	 
	 	By: 	SWK HP Holdings GP LLC its general partner
	 	 	 	 	 
	 	By: 	/s/ Brett Pope	 
	 	 	Name: 	Brett Pope	 
	 	 	Title: 	Manager	 
	 	 	 	 	 
	 	 	 	 	 
	 	HOLMDEL THERAPEUTICS,
LLC
	 	 	 	 	 
	 	By: 	/s/ ***	 
	 	 	Name: 	***	 
	 	 	Title: 	Director	 
	 	 	 	 	 
	 	By: 	/s/ ***	 
	 	 	Name: 	***	 
	 	 	Title: 	Director	 
	 	 	 	 	 



 


 


 






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SCHEDULE A


 


PARTNER
SCHEDULE


	 	 	 	 
	Limited Partner Information	Capital

Contribution	Partner

Percentage[*]	Date of Admission
	 	 	 	 
	SWK HP Holding LP	$12,998,700	84.0580%	December 20, 2012
	c/o SWK HP Holdings GP LLC	 	 	 
	15770 North Dallas Parkway	 	 	 
	Suite 1290	 	 	 
	Dallas, Texas 75248	 	 	 
	Attn:  Brett Pope	 	 	 
	 	 	 	 
	Holmdel Therapeutics, LLC	$1,999,800	15.9320%	December 20, 2012
	***	 	 	 
	***	 	 	 
	Attn:  ***	 	 	 
	 	 	 	 
	    	 	 	 
	General Partner Information	Capital

Contribution	Partner

Percentage	Date of Admission
	 	 	 	 
	HP General Partner LLC	$1,500	0.0100%	December 20, 2012
	 	 	 	 
	c/o SWK HP Holdings GP LLC	 	 	 
	15770 North Dallas Parkway	 	 	 
	Suite 1290	 	 	 
	Dallas, Texas 75248	 	 	 
	Attn:  Brett Pope	 	 	 


 





 






[*]After
SWK has received distributions from the Partnership in an amount equal to:


		-	One time (1x) its Capital Contribution, its Partner Percentage shall be decreased to ***% and
HT’s Partner Percentage shall be increased to ***%;



		-	Two time (2x) its Capital Contribution, its Partner Percentage shall be decreased to ***% and
HT’s Partner Percentage shall be increased to ***%;



		-	Three and one-half times (3.5x) its Capital Contribution (i) within seven (7) years from the date
of this Agreement, its Partner Percentage shall be decreased to 39.3744% and HT’s Partner Percentage shall be increased to
60.6156% or (ii) more than seven (7) years from the date of this Agreement, its Partner Percentage shall be increased to 49.5995%
and HT’s Partner Percentage shall be decreased to 50.3905%.