Document:

Amended and Restated Research and Development Agreement

 Exhibit 10.5 
  
 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE
SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 
  
  
  
  
 EXECUTION COPY 
  

  
  
 AMENDED AND RESTATED 
 RESEARCH AND DEVELOPMENT AGREEMENT 
  
 among 
  
 EXELIXIS, INC., 
  
 SYMPHONY EVOLUTION HOLDINGS LLC, 
  
 and 
  
 SYMPHONY
EVOLUTION, INC. 
  

  
 Dated as of June 9, 2005 
  

  

 TABLE OF CONTENTS 
  

					
	 	  	 	  	Page
			
	1.	  	Assignment	  	1
			
	2.	  	Overview of the Development	  	1
			
	3.	  	Development Committee	  	1
			
	4.	  	Development Plan and Development Budget	  	2
			
	 	  	 4.1      Generally
	  	2
	 	  	 4.2      Amendments
	  	2
	 	  	 4.3      Exelixis Funded Research
	  	4
			
	5.	  	Regulatory Matters	  	4
			
	 	  	 5.1      FDA Sponsor
	  	4
	 	  	 5.2      Correspondence
	  	4
	 	  	 5.3      Inspections
	  	5
	 	  	 5.4      Transfer of FDA Sponsorship
	  	5
			
	6.	  	Exelixis’ Obligations	  	6
			
	 	  	 6.1      Generally
	  	6
	 	  	 6.2      Discretion
	  	6
	 	  	 6.3      Subcontracting
	  	6
	 	  	 6.4      Reports
	  	7
	 	  	 6.5      Staffing
	  	7
	 	  	 6.6      QA Audit
	  	8
	 	  	 6.7      Financial Audit
	  	8
	 	  	 6.8      Insurance
	  	8
			
	7.	  	Symphony Evolution’s Obligations	  	9
			
	 	  	 7.1      Generally
	  	9
	 	  	 7.2      Subcontracting
	  	9
	 	  	 7.3      Insurance
	  	9
	 	  	 7.4      Staffing
	  	9
	 	  	 7.5      Audit
	  	9
			
	8.	  	Funding and Payments	  	9
			
	 	  	 8.1      Use of Proceeds
	  	9
	 	  	 8.2      Reimbursement
	  	9
	 	  	 8.3      Budget Allocation and Deviations
	  	10
	 	  	 8.4      Employee Benefits
	  	11
	 	  	 8.5      Taxes on Program Option, Discontinuation Option and Sale to Third Party
	  	12
			
	9.	  	Covenants	  	12
			
	 	  	 9.1      Mutual Covenants
	  	12

  

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AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

					
	 10.
	  	Confidentiality	  	13
			
	 	  	 10.1    Confidentiality Agreement
	  	13
	 	  	 10.2    Permitted Disclosure of Information
	  	13
			
	 11.
	  	Options and Licensing	  	13
			
	 	  	 11.1    Program Option
	  	13
	 	  	 11.2    Discontinuation Option
	  	16
	 	  	 11.3    Post-Term
	  	17
			
	 12.
	  	Representations and Warranties	  	17
			
	 	  	 12.1    Exelixis Representations and Warranties
	  	17
	 	  	 12.2    Symphony Evolution Representations and Warranties
	  	19
			
	 13.
	  	Relationship Between Exelixis and Symphony Evolution	  	20
			
	 14.
	  	Change of Control	  	20
			
	 15.
	  	No Restrictions; Indemnification	  	21
			
	 	  	 15.1    No Restrictions
	  	21
	 	  	 15.2    Indemnification
	  	21
			
	 16.
	  	Limitation of Liabilities	  	24
			
	 	  	 16.1    Between the Parties
	  	24
	 	  	 16.2    Pursuant to the Management Services Agreement
	  	25
			
	 17.
	  	Term and Termination	  	25
			
	 	  	 17.1    Term
	  	25
	 	  	 17.2    Termination for Exelixis’ Breach
	  	26
	 	  	 17.3    Termination for Symphony Evolution’s Breach
	  	26
	 	  	 17.4    Termination of License Agreement
	  	26
	 	  	 17.5    Survival
	  	26
			
	 18.
	  	Miscellaneous	  	26
			
	 	  	 18.1    No Petition
	  	26
	 	  	 18.2    Notices
	  	26
	 	  	 18.3    Governing Law; Consent to Jurisdiction and Service of Process
	  	28
	 	  	 18.4    Third-Party Beneficiary
	  	28
	 	  	 18.5    Waiver of Jury Trial
	  	28
	 	  	 18.6    Entire Agreement
	  	28
	 	  	 18.7    Amendment; Successors; Assignment; Counterparts
	  	29
	 	  	 18.8    Severability
	  	29

  

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AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 AMENDED AND RESTATED 
 RESEARCH AND DEVELOPMENT AGREEMENT 
  
 This AMENDED AND RESTATED RESEARCH AND DEVELOPMENT AGREEMENT (this “Agreement”) is entered into as of June 9, 2005 (the “Effective Date”) by and among EXELIXIS, INC., a
Delaware corporation (“Exelixis”), SYMPHONY EVOLUTION, INC., a Delaware corporation (“Symphony Evolution”) (each of Exelixis and Symphony Evolution being a “Party,” and
collectively, the “Parties”), and SYMPHONY EVOLUTION HOLDINGS LLC, a Delaware limited liability company (“Holdings”) (which shall be a Party to this Agreement solely with respect to Article 1
and Section 7.5). Capitalized terms used herein and not defined herein shall have the meanings assigned to such terms in Annex A attached hereto. 
  

PRELIMINARY STATEMENT 
  
 Exelixis and Holdings have entered into that certain Research and Development Agreement, dated as of June 9, 2005 (the “Research and
Development Agreement”). Pursuant to this Agreement, Holdings desires to assign all of its rights and delegate its obligations under the Research and Development Agreement to Symphony Evolution, and Exelixis and Symphony Evolution
desire to amend and restate the terms and conditions of the Research and Development Agreement. 
  
 In the Novated and Restated Technology License Agreement, Exelixis grants Symphony Evolution an exclusive license to develop and commercialize certain
compounds. Symphony Evolution wishes for Exelixis to continue to develop such compounds. Symphony Evolution and Exelixis desire to establish, and agree on the responsibilities of, a Development Committee to oversee such development. Exelixis and
Symphony Evolution further desire to comply with and perform certain agreements and obligations related thereto. 
  
 The Parties hereto agree as follows: 
  

	1.	Assignment. The Parties agree that from and after the Effective Date, all of the rights and obligations of Holdings under the Research and Development Agreement will
be assigned and transferred to, and assumed by, Symphony Evolution. 

  

	2.	Overview of the Development. The Parties shall develop the Programs in a collaborative and efficient manner. The Parties shall engage in joint decision-making for the
Programs as set forth in Articles 3 and 4. As between the Parties, Exelixis shall be the sole Party performing pre-clinical and clinical development, all scientific and technical services associated with such development, and patent work
under the Programs, including all matters set forth in the Clinical Plan, and Symphony Evolution shall be responsible for all matters set forth in the Management Plan. 

  

	3.	Development Committee. The Parties shall establish and maintain a committee (the “Development Committee”) to oversee the development of the
Programs. The Development Committee shall be established, operated and governed in accordance with 

  

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AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 the policies and procedures set forth in Annex B hereto (the “Development Committee
Charter”). The Development Committee Charter may only be amended with the consent of the Development Committee and the approval of Symphony Evolution and Exelixis. In no event shall the Development Committee have the power to amend the
terms of any Operative Documents. 
  

	4.	Development Plan and Development Budget. 

  
 4.1 Generally. The Parties have agreed to a Development Plan and Development Budget as of the Effective Date, which are attached hereto and
incorporated herein as Annex C and Annex D, respectively. Such Development Plan consists of two (2) plans: (a) a plan that governs all clinical, scientific, technical, regulatory and patent work to be performed under the Operative
Documents (the “Clinical Plan”), and (b) a plan that governs all other matters pertaining to Symphony Evolution (the “Management Plan”). The Clinical Plan includes without limitation (i) an outline of
the clinical plan for each Program, (ii) all available Protocols for each Program, (iii) detailed synopses for each Program for which Protocols have not yet been developed, and (iv) outlines of non-clinical activities, key regulatory and quality
activities, and CMC activities for each Program. The Development Budget consists of a budget for the Clinical Plan (the “Clinical Budget”) and a budget for the Management Plan (the “Management
Budget”). The Clinical Budget is further divided into a separate budget for each Protocol, and shall include without limitation budget spreadsheets summarizing anticipated costs of engaging third party service providers for such
Protocol and scope of Protocol-related work to be performed by such third parties. Notwithstanding the foregoing, the number of full-time equivalents (“FTEs”) to be dedicated to the Programs by Exelixis shall be specified in
the Clinical Budget, by function and work responsibilities, on a Program by Program basis. All anticipated or actual expenditures of Symphony Evolution, including without limitation, compensation of members of the Symphony Evolution Board, are
included in the Development Budget attached hereto as Annex D and will be continue to be included in any amendments thereof. 
  
 4.2 Amendments. 
  
 (a) Subject to Sections 5.1 and 8.3, all amendments of and, subject to Sections 5.1, 6.2 and 8.3, all deviations from the Development Plan and
Development Budget shall be made in accordance with the procedures described in this Article 4 or the Management Services Agreement, as applicable, and the Development Committee Charter, including obtaining the approval of the Symphony Evolution
Board. 
  
 (b) The Development Committee shall review the
Development Plan and Development Budget [ * ] to determine whether any changes are needed and shall comply with all procedures required to amend the Development Plan or Development Budget to implement such changes. 
  
 (c) Notwithstanding anything in this Agreement to the contrary, if
Exelixis desires to: (i) add a Protocol for which there is no detailed synopsis in the Clinical Plan; (ii) adopt a Protocol which materially deviates from its corresponding synopsis in the Clinical Plan; (iii) eliminate a Protocol (including for a
Medical Discontinuation Event); (iv) pursue a new 
  

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 indication for a Program; (v) make any material change to the non-clinical activities or CMC activities described in the
Program outlines; (vi) make any change in a Protocol that, based on Exelixis’ reasonable judgment, would result in a delay of more than [ * ] in the completion of a Protocol; (vii) make any material change in the entry criteria for a
Protocol; (viii) make any change to the primary study endpoint of a Protocol; or (ix) make any change to other endpoints or outcome measures of a Protocol that, based on Exelixis’ reasonable judgment, is likely to materially affect the label,
cost, feasibility or timeline of such Protocol, then it shall propose to the Development Committee that the Clinical Plan and, if applicable, the Clinical Budget be amended to reflect such change; provided, however that with respect to the adoption
of a Protocol that materially deviates from its corresponding detailed synopsis, the Clinical Plan need only be amended to account for such material deviations. Subject to Section 4.3, Exelixis shall not implement any of the changes described
in this Section 4.2(c) until the Clinical Plan and, if applicable, Clinical Budget are so amended. 
  
 (d) The Clinical Budget shall be periodically amended to account for any additional expenditures approved by a Development Committee Member
appointed by Symphony Evolution (“Symphony Member”) in accordance with Section 8.3(b). If the Symphony Member denies an Exelixis additional expenditure request made pursuant to Section 8.3(b), the Development
Committee shall convene an Ad Hoc Meeting as soon as practical thereafter to consider amending the Clinical Budget to include such additional expenditure. 
  
 (e) If Exelixis brings to the Development Committee’s attention a potential additional expenditure pursuant to Section 8.3(c), the
Development Committee shall consider amending the Clinical Budget to include such additional expenditure at the next meeting of the Development Committee. 
  
 (f) A Protocol may only be discontinued or abandoned in the event that either (i) (A) a Medical Discontinuation Event arises in such Protocol or
(B) the Parties mutually agree, based on scientific evidence (regardless of whether such evidence was generated by a Party or a third party), that [ * ] (a “Scientific Discontinuation Event”), or (ii) the Symphony
Board, by unanimous vote, resolves to discontinue or abandon a Protocol. The Development Committee shall promptly thereafter amend the Clinical Plan to reflect such discontinuation or abandonment and amend the Clinical Budget to reallocate to any or
all of the remaining Protocols the funds previously allocated to the discontinued or abandoned Protocol (with any funds not then allocated to another Protocol to be held for reallocation by the Development Committee at another time). 
  
 (g) A Program may only be discontinued or abandoned in the event that
either (i) the Parties mutually agree to discontinue or abandon such Program based on a Medical Discontinuation Event or Scientific Discontinuation Event that arose in a Protocol in such Program, or (ii) the Symphony Board, by unanimous vote,
resolves to discontinue or abandon such Program. The Development Committee shall promptly thereafter amend the Clinical Plan to reflect such discontinuation or abandonment and amend the Clinical Budget to reallocate to any or all of the remaining
Programs the funds previously allocated to the discontinued or abandoned Program (with any funds not then allocated to be held for reallocation by the Development Committee at another time). 
  

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 (h) The Parties acknowledge that Exelixis has diligence obligations to GlaxoSmithKline with
respect to the Products and Programs. To assure Exelixis’ fulfillment of such obligations, the activities set forth in the Clinical Plan (including any and all amendments thereto) shall always involve [ * ] develop Products. Such efforts
shall include but not be limited to [ * ] such Product. 
  
 (i) The Clinical Plan shall never be amended in any manner that would require Exelixis or Symphony Evolution to perform any assignments or tasks in a manner that would violate any applicable law or regulation. In the event of a
change in any applicable law or regulation, the Development Committee shall consider amending the Clinical Plan to enable Exelixis or Symphony Evolution (as the case may be) to comply fully with such law or regulation. If the Development Committee
does not approve such an amendment, the affected Party shall be excused from performing any activity specified in the Clinical Plan that would violate or result in a violation of any applicable law or regulation. 
  
 4.3 Exelixis Funded Research. Each of Symphony Evolution and
Exelixis hereby agrees that, until the end of the Term, Exelixis, using commercially reasonable methods, may expend its own funds to extend, increase, or otherwise modify, outside the scope of the Clinical Plan, the trials and development activities
run by Exelixis, subject to the approval of the Development Committee (which approval shall not be withheld unless the Development Committee determines in good faith that such changes would have a material adverse effect on the development of the
Program). Such additional Exelixis-supplied funds shall not be included in the calculations used to determine the Program Option Exercise Price (pursuant to Section 11.1 hereof) or the Purchase Price (pursuant to Section 2(b) of the
Purchase Option Agreement). Exelixis agrees that the results of such research and development shall immediately become part of the Licensed Intellectual Property and shall thereafter be subject to the terms of the Operative Documents. Exelixis’
rights pursuant to this Section 4.3 are in addition to, and separate from, its rights pursuant to Sections 8.3(b) and 8.3(c). 
  

	5.	Regulatory Matters. 

  
 5.1 FDA Sponsor. Notwithstanding any governance provision contained herein or in any Operative Document, the Parties agree that, until the
expiration of the unexercised Purchase Option, Exelixis shall be the FDA Sponsor for the Programs (except any Programs which were the subject of a Discontinuation Option that was not exercised by Exelixis). Exelixis shall have the responsibility and
the authority to act as the sponsor and make those decisions and take all actions necessary to assure compliance with all regulatory requirements. Exelixis agrees to be bound by, and perform all obligations set forth in, 21 C.F.R. § 312 related
to its role as the FDA sponsor for the Programs (the “FDA Sponsor”). Notwithstanding anything to the contrary in Article 4 or the Development Committee Charter, Exelixis may discontinue or modify any Program without the
approval of the Development Committee or the Symphony Evolution Board in the event such actions are: (a) triggered by an event that is reportable to the FDA; and (b) reasonably necessary to avoid the imposition of criminal or civil liability.

  
 5.2 Correspondence. Each Party hereto
acknowledges that Exelixis shall be the Party responding to any regulatory correspondence or inquiry. However, each Party shall: (a) notify the other Parties promptly of any FDA or other governmental or regulatory inspection or 
  

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 inquiry concerning any study or project under the Programs, including, but not limited to, inspections of investigational
sites or laboratories; and (b) forward to the other Parties copies of any correspondence from any regulatory or governmental agency relating to such a study or project, including, but not limited to, Form FD-483 notices and FDA refusal to file,
action or warning letters, even if they do not specifically mention the other Parties. Symphony Evolution shall obtain the written consent of Exelixis, which consent will not be unreasonably withheld, before referring to Exelixis or its Affiliates
in any regulatory correspondence, except to the extent that such reference is required by law or simply refers to the existence of this Agreement or any of the other Operative Documents. Exelixis shall be the Party responsible for responding to or
handling any FDA or regulatory inspection. Exelixis shall notify the Development Committee (i) within twenty-four (24) hours of the commencement of a clinical hold for any Protocol, and (ii) concurrently with its submission to the FDA of any IND
safety reports for the Programs. 
  
 5.3
Inspections. Each Party agrees that during an inspection by the FDA or other Regulatory Authority concerning any study or project under the Programs, it will not disclose information and materials that are not required to be disclosed to
such agency without the prior consent of the other Parties, which consent shall not be unreasonably withheld. Such information and materials include, but are not limited to, the following: (a) financial data and pricing data (including, but not
limited to, the budget and payment schedule); (b) sales data (other than shipment data); and (c) personnel data (other than data as to qualification of technical and professional persons performing functions subject to regulatory requirements).

  
 5.4 Transfer of FDA Sponsorship. 
  
 (a) Within a reasonable time after the expiration of the unexercised
Purchase Option and as of a date to be agreed upon by Symphony Evolution and Exelixis, Exelixis shall cease to act as the FDA sponsor for the Programs for which Exelixis has not exercised the Program Option or Discontinuation Option, and Exelixis
and Symphony Evolution shall, at Symphony Evolution’s expense, take all actions necessary to effect the transfer of the Regulatory Files solely related to such Programs to Symphony Evolution or its designee in accordance with Section 2.7
of the Novated and Restated Technology License Agreement. In conjunction with such transfer, Exelixis shall assign to Symphony Evolution or its designee all of the material agreements to which Exelixis is a Party and which: (i) are related to such
Programs; (ii) provide Exelixis with goods and services (clinical and manufacturing) from third party suppliers and subcontractors; and (iii) are assignable to Symphony Evolution or its designee. Exelixis shall use commercially reasonable efforts to
cause the transfer of any non-assignable material agreements meeting the criteria set forth in (i) and (ii) above. Such efforts shall not include any obligation for Exelixis to incur any out-of-pocket costs in connection with such transfer.

  
 (b) Upon the discontinuation or abandonment of any of
the Protocols pursuant to Section 4.2(f), Exelixis shall have no further obligations with respect to such Protocols under the Operative Documents. Upon the discontinuation or abandonment of any of the Programs pursuant to Section
4.2(g), Exelixis shall have no further obligations with respect to such Programs under the Operative Documents. If such Programs are transferred or licensed to GlaxoSmithKline or a third party in accordance with Section 11.1(f) (such
third party or GlaxoSmithKline, as applicable, the “Transferee”), then Exelixis shall cooperate with 
  

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Symphony Evolution and the Transferee to effect the assignment to the Transferee of the sponsorship to the Regulatory Files with respect to the Program for
which Transferee has acquired rights; provided, however, that Exelixis shall not be obligated to take any action pursuant to this Section 5.4(b) for which it will not receive full reimbursement from Symphony Evolution or another party. The
assignment of such Regulatory Files to the Transferee does not include an assignment of any Licensed Intellectual Property. 
  

	6.	Exelixis’ Obligations. 

  
 6.1 Generally. Exelixis will be responsible for all matters set forth in the Clinical Plan (collectively, the “Exelixis
Obligations”). Each of the Parties agrees that Exelixis will work diligently and use commercially reasonable efforts to develop the Programs in a good scientific manner and, subject to Section 6.2 below, in accordance with the
Clinical Plan, the Clinical Budget, and the terms of this Agreement. 
  
 6.2 Discretion. Exelixis shall have the right to use commercially reasonable discretion in carrying out the Exelixis Obligations including without limitation (a) carrying out day-to-day planning and implementation of
activities under the Clinical Plan; (b) managing regulatory compliance matters, including adverse event reporting; (c) preparing and submitting all regulatory filings; (d) managing clinical research organizations engaged to carry out activities
under the Clinical Plan; (e) managing the clinical trials that have been specified under the Clinical Plan; and (f) maintaining and managing its internal budget in accordance with established internal processes. 
  
 6.3 Subcontracting. Exelixis shall have the right to negotiate
and enter into arms’ length agreements with third parties (including without limitation clinical research organizations and contract manufacturers) for such third parties to perform activities called for or consistent with the Clinical Plan
(each such third party, a “Subcontractor” and each such agreement, a “Subcontracting Agreement”). All such agreements entered into by Exelixis prior to the Closing Date (except for those master
services agreements executed prior to the Closing Date that, only through the subsequent addition of a new work order, change order, project or the like after the Closing Date, become Subcontracting Agreements) are set forth in Schedule 6.3 and
shall be deemed to be acceptable to the Parties in all respects. After the Closing Date, Exelixis shall obtain the approval of the Development Committee before (i) entering into any Subcontracting Agreement that (a) is not [ * ], (b) is not
[ * ], or (c) [ * ] or (ii) amending any Subcontracting Agreement in a manner that would cause such agreement to satisfy the criteria set forth in (a), (b) or (c); provided, however, if Exelixis subcontracts any work under the Programs
through submitting a work order, change order, or the like under an existing master services agreement with a third party (for the avoidance of doubt, such work order or change order shall then become a Subcontracting Agreement), Exelixis shall not
be required to seek the approval from the Development Committee for the submission of such work order or change order or to amend such existing master services agreement unless (1) such work order or change order would alter the terms of an existing
master services agreement that had not previously satisfied the criteria set forth in (a), (b) or (c) in a manner that causes such existing master services agreement to thereafter satisfy the criteria set forth in (a), (b) or (c), in which case
Exelixis would obtain approval of the Development Committee for the submission of such work order or change order or (2) such amendment would take effect concurrently with or after the submission of a 
  

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 work order or change for work under the Programs and would alter the terms of an existing master services agreement that
had not previously satisfied the criteria set forth in (a), (b) or (c) in a manner that causes such existing master services agreement to thereafter satisfy the criteria set forth in (a), (b) or (c), in which case Exelixis would need to obtain
approval of the Development Committee for the execution of such amendment. Exelixis need not obtain Development Committee approval prior to entering into or amending any other Subcontracting Agreement. Exelixis shall provide the Development
Committee with a copy of each executed Subcontracting Agreement within [ * ] after its execution. The terms of each such agreement shall be deemed the Confidential Information of Exelixis and be subject to the rights and obligations set forth
in the Confidentiality Agreement. Exelixis shall monitor the performance of its Subcontractors and shall use its reasonable discretion to address any Subcontractor performance issues, including without limitation, terminating or amending the
relevant Subcontracting Agreement. Exelixis shall promptly notify the Development Committee with respect to any Subcontractor performance issues that may have a material effect on the Programs. Provided that Exelixis so informs the Development
Committee and follows the Development Committee’s reasonable advice regarding such issues, which may include terminating the Subcontracting Agreement or exercising other remedies, Exelixis shall not be considered in breach of this Agreement or
the other Operative Documents in the event that it is unable to fulfill its obligations under this Agreement on account of a Subcontractor’s failure to perform its obligations pursuant to a Subcontracting Agreement so long as Exelixis (a)
exercised commercially reasonable efforts in supervising such Subcontractor, and (b) used commercially reasonable efforts to mitigate the effects of such failure or to replace such Subcontractor after learning of such Subcontractor’s failure to
perform. 
  
 6.4 Reports. Exelixis shall keep the
Development Committee informed of its activities under the Clinical Plan through regular written reports. At each Quarterly Meeting of the Development Committee, Exelixis shall provide the Development Committee with a summary report of
Exelixis’ activities and developments with respect to the Programs for the preceding quarter. Each such summary report shall be consistent, in terms of topics covered and level of detail provided, with the quarterly report that Exelixis
provides to the Exelixis-GlaxoSmithKline collaboration committee. Once a [ * ], Exelixis shall provide the Development Committee with either (a) a written report that includes the information specified in the next sentence or (b) access to an
Exelixis computer system that contains such information. Each [ * ] written report shall include: (i) a copy of each new Protocol being drafted by Exelixis; (ii) a copy of each standard clinical study progress report received by Exelixis
during the preceding [ * ] from any of the clinical research organizations engaged by Exelixis pursuant to Subcontracting Agreements; (iii) updates regarding (A) [ * ], and (B) [ * ]; (iv) a financial report, in the format
agreed upon by the Parties, itemizing actual spending under the Clinical Plan as well as any variation from planned spending; and (v) if the budget related to a particular Program is altered to the extent that available funding for such Program no
longer appears to be adequate to complete the Program, an updated budget forecast. 
  
 6.5 Staffing. Exelixis shall use commercially reasonable efforts to provide such sufficient and competent staff and Personnel (including, without limitation, such employees or agents of, or independent
contractors retained by, Exelixis) that have the skill and expertise necessary to perform Exelixis’ obligations under the Clinical Plan. Exelixis shall notify Symphony Evolution of any change in key personnel involved in the Programs.

  

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 6.6 QA Audit. During the Term, Exelixis will permit Symphony Evolution’s
representatives, such representatives to be identified by Symphony Evolution in advance and reasonably acceptable to Exelixis, to audit the work performed by Exelixis hereunder and the Exelixis facilities at which such work is conducted to determine
that the project assignment is being conducted in accordance with the agreed upon services (“QA Audits”), which review will last no more than eight (8) hours during regular business hours and will take place no more than once
per year unless (i) there are significant changes to Exelixis’ Standard Operating Procedures, which may require additional QA Audits or (ii) the Development Committee determines additional QA Audits are necessary. Symphony Evolution shall give
Exelixis reasonable advance notice of such QA Audits specifying the scope of the audit, which shall not include work that has previously undergone QA Audits. Symphony Evolution shall reimburse Exelixis for its time associated with QA Audits;
provided, however, that should a particular QA Audit reveal a material deficiency in the work performed, then Symphony Evolution will not be responsible for costs associated with such QA Audit, the work to be re-performed or the costs or expenses
associated with curing any material deficiencies. Symphony Evolution and Exelixis shall meet to discuss the results of the QA Audit and, if required, jointly agree upon any actions that will be required as a result of such audits including defining
material deficiencies to be addressed. Exelixis shall make commercially reasonable efforts to reconcile all such deficiencies found by Symphony Evolution during such QA Audit. 
  
 6.7 Financial Audit. During the Term, Exelixis will permit Symphony Evolution’s representatives, such
representatives to be identified by Symphony Evolution in advance and reasonably acceptable to Exelixis, to verify Exelixis’ receipts and FTE records that are related to Exelixis’ performance of the work under the Programs
(“Financial Audits”), which review shall be conducted during regular business hours and (i) last only as long as necessary to achieve the purpose of such Financial Audit and (ii) will take place no more than once per year,
unless otherwise agreed to by the Parties. Symphony Evolution shall give Exelixis reasonable advance notice of such Financial Audits specifying the scope of the audit, which shall not include work that has previously undergone Financial Audits.
Symphony Evolution shall reimburse Exelixis for its time associated with Financial Audits; provided, however, that should a particular Financial Audit reveal a material discrepancy between such financial records and the reports submitted by Exelixis
to Symphony Evolution for reimbursement purposes, then Symphony Evolution will not be responsible for costs associated with such Financial Audit. Symphony Evolution and Exelixis shall meet to discuss the results of the Financial Audit and, if
required, jointly agree upon any actions that will be required as a result of such audits including defining material discrepancies to be addressed. Exelixis shall make commercially reasonable efforts to reconcile all such discrepancies found by
Symphony Evolution during such Financial Audit. 
  
 6.8
Insurance. Exelixis shall carry and maintain throughout the Term clinical trial liability insurance (including errors and omissions coverage and product coverage), at Exelixis’ sole expense, with limits of at least [ * ], and
property insurance covering Products, at Exelixis’ sole expense, with limits of at least [ * ]. Upon Symphony Evolution’s request, Exelixis’ insurance carrier(s) shall promptly furnish Symphony Evolution certificates reflecting
such 
  

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 coverage and a representation indicating that such coverage shall not be canceled or otherwise terminated during the Term
without [ * ] prior written notice to Symphony Evolution. Notwithstanding anything to the contrary herein, this Section 6.8 shall survive for a period of [ * ] years following termination or expiration of this Agreement.

  

	7.	Symphony Evolution’s Obligations. 

  
 7.1 Generally. Symphony Evolution will be responsible for all matters set forth in the Management Plan. Symphony Evolution shall perform all
activities set forth in the Management Plan acting in a good faith and in accordance with the Management Plan, the Management Budget, and the terms of this Agreement. 
  
 7.2 Subcontracting. Symphony Evolution is subcontracting certain of its responsibilities under the Management
Plan to RRD International, LLC (“RRD”) pursuant to the Management Services Agreement between RRD and Symphony Evolution. 
  
 7.3 Insurance. Symphony Evolution shall maintain insurance with creditworthy insurance companies against such risks and in such amounts as
are usually maintained or insured against by other companies of established repute engaged in the same or a similar business. 
  
 7.4 Staffing. Symphony Evolution shall use commercially reasonable efforts to provide, or cause to be provided on its behalf (including
Personnel retained by RRD), sufficient and competent staff and Personnel that have the skill and expertise necessary to develop the Programs in accordance with the Management Plan and the Management Budget and to otherwise perform Symphony
Evolution’s obligations under this Agreement. 
  
 7.5
Audit. Symphony Evolution shall permit each of Exelixis, Holdings, Investors and each Symphony Fund and their duly authorized representatives at all reasonable hours to inspect (1) Symphony Evolution’s books, records and other reasonably
requested materials and (2) any and all properties of Symphony Evolution, and it shall provide to each of Exelixis, Holdings, Investors and each Symphony Fund all books, records and other materials related to any meeting of the Symphony Evolution
Board and to permit Holdings, Investors and each Symphony Fund to make copies or extracts therefrom. 
  

	8.	Funding and Payments. 

  
 8.1 Use of Proceeds. Symphony Evolution shall use any and all net proceeds received by Symphony Evolution as a result of the Financing for
the sole purpose of the development of the Programs, including the payment of any indemnification obligations of Symphony Evolution under the Operative Documents and the payment of costs and expenses in accordance with the Development Plan and the
Development Budget, as may be modified from time to time pursuant to Section 4.2 or deviated from in accordance with Section 8.3. 
  
 8.2 Reimbursement. Symphony Evolution shall compensate Exelixis fully for its planning, performance and supervision of Clinical
Plan-associated activities. Such compensation shall be made in accordance with the provisions of this Article 8 and the payment terms attached hereto as Annex E (the “Payment Terms”), the terms of which are
adopted and incorporated herein. 
  

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 8.3 Budget Allocation and Deviations 
  
 (a) Exelixis shall have the discretion to incur out-of-pocket fees, expenses and costs and allocate Exelixis
resources in a manner that is generally consistent with the Clinical Budget, including without limitation deviating from the specific allocations set forth in the Clinical Budget, except as otherwise provided in Sections 8.3(b) or 8.3(c) (as
applicable). In addition, Exelixis shall amend the Clinical Budget accordingly in respect of any such fees, expenses, costs and allocations on a quarterly basis. Exelixis shall be fully compensated for all amounts to which Sections 8.3(b) and
8.3(c) do not apply and all amounts that are approved pursuant to Section 8.3(b) or are included in an amended Clinical Budget. 
  
 (b) If Exelixis reasonably anticipates that the actual cost for a Protocol will exceed that portion of the Clinical Budget allocated for such
Protocol by [ * ] or more in the aggregate, then Exelixis shall contact a Symphony Member to request approval for such additional expenditure. Such Symphony Member shall approve or deny such request within [ * ] of the time when
Exelixis speaks with such Symphony Member via telephone or in person. If such Symphony Member does not inform Exelixis of such approval or denial within such period, then such Symphony Member shall be deemed to have approved such additional
expenditure. If, despite Exelixis’ reasonable efforts to speak with a Symphony Member (which efforts shall include leaving voicemail and email messages for at least two (2) Symphony Members), Exelixis does not succeed in speaking with any
Symphony Member within [ * ] after Exelixis initiated such efforts, such additional expenditure request shall be deemed approved by a Symphony Member unless any Symphony Member informs Exelixis, within [ * ] of the end of such [ *
] period, that such request has been denied. If the Symphony Member approves such additional expenditure, then Exelixis shall be reimbursed pursuant to Sections 8.2 and 8.3 for such additional expenditure. If the Symphony Member denies
such request, then Exelixis may, in its discretion, (i) suspend performance of those incremental activities under the Clinical Plan that are expected to give rise to some or all of such additional expenditure until such time as the Clinical Budget
is amended to include such additional expenditure or (ii) proceed with performance of those incremental activities under the Clinical Plan that are expected to give rise to some or all of such additional expenditure, with the understanding that if
the Clinical Budget is not subsequently amended to include the entirety of such additional expenditures, then Exelixis may not be reimbursed for those resulting expenditures that exceed the Clinical Budget, and further that if the Clinical Budget is
subsequently amended to include some or all of such additional expenditures, then Exelixis shall be reimbursed pursuant to Sections 8.2 and 8.3 for such additional expenditures included in the amended Clinical Budget. If Exelixis incurs
expenditures as described in the preceding sentence for which it is not entitled to be reimbursed by Symphony Evolution pursuant to the preceding sentence, then none of such expenditures shall be included in the calculations used to determine the
Program Option Exercise Price (pursuant to Section 11.1 hereof) or the Purchase Price (pursuant to Section 2(b) of the Purchase Option Agreement). Exelixis agrees that the results of any research and development that it funds pursuant
to this Section 8.3(b) shall immediately become part of the Licensed Intellectual Property and shall thereafter be subject to the terms of the Operative Documents. 
  

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 (c) If Exelixis reasonably anticipates that the actual cost in the aggregate of all other
activities covered by the Clinical Budget but not included in those portions of the Clinical Budget allocated to particular Protocols specified in the Clinical Plan, such as CMC, non-clinical and regulatory activities, will exceed that portion of
the Clinical Budget allocated for such activities by [ * ] or more in the aggregate, then Exelixis shall bring such potential additional expenditure to the attention of the Development Committee and Exelixis may, in its discretion, (i)
suspend performance of those incremental activities under the Clinical Plan that are expected to give rise to some or all of such additional expenditure until such time as the Clinical Budget is amended to include such additional expenditure or (ii)
proceed with performance of those incremental activities under the Clinical Plan that are expected to give rise to some or all of such additional expenditure, with the understanding that if the Clinical Budget is not subsequently amended to include
the entirety of such additional expenditures, then Exelixis may not be reimbursed for those resulting expenditures that exceed the Clinical Budget, and further that if the Clinical Budget is subsequently amended to include some or all of such
additional expenditures, then Exelixis shall be reimbursed pursuant to Sections 8.2 and 8.3 for such additional expenditures included in the amended Clinical Budget. If Exelixis incurs expenditures as described in the preceding sentence for
which it is not entitled to be reimbursed by Symphony Evolution pursuant to the preceding sentence, then none of such expenditures shall be included in the calculations used to determine the Program Option Exercise Price (pursuant to Section
11.1 hereof) or the Purchase Price (pursuant to Section 2(b) of the Purchase Option Agreement). Exelixis agrees that the results of any research and development that it funds pursuant to this Section 8.3(c) shall immediately become
part of the Licensed Intellectual Property and shall thereafter be subject to the terms of the Operative Documents. 
  
 (d) If the Clinical Budget is not amended to include any additional expenditure brought to the attention of the Development Committee pursuant to
Section 8.3(b) or 8.3(c) and Exelixis does not elect to fund such additional expenditures, then the Development Committee shall recommend and the Symphony Evolution Board shall approve an amendment of the Clinical Plan that adjusts the scope
of the work to that which can be reasonably accomplished within the constraints of the Clinical Budget. Under no circumstances shall Exelixis be obligated to incur out-of-pocket fees, expenses or costs or to utilize Exelixis resources in connection
with its performance of the work under the Programs for which Exelixis will not be reimbursed by Symphony Evolution. 
  
 8.4 Employee Benefits. Symphony Evolution shall not be responsible for providing or paying any benefits (including, but not limited to,
unemployment, disability, insurance, or medical, and any pension or profit sharing plans) to Exelixis or to any employees of Exelixis or any persons retained or used by Exelixis to perform activities pursuant to the Clinical Plan, including
independent contractors, Subcontractors and agents (collectively, “Exelixis Personnel”). As to Exelixis or any Exelixis Personnel, Symphony Evolution shall not be responsible for: (a) any federal, state or local income tax
withholding; (b) “FICA” contributions; (c) contributions to state disability funds or liability funds or similar withholdings; (d) payment of any overtime wages; (e) workers’ compensation; or (f) compliance with any laws, rules or
regulations governing employees. Exelixis agrees that, as between Symphony Evolution and Exelixis, Exelixis is and will continue to be solely responsible for: (i) all matters relating to the payment of compensation and provision of benefits to
Exelixis Personnel; and (ii) compliance with all applicable laws, rules and regulations governing Exelixis’ employees. 
  

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 8.5 Taxes on Program Option, Discontinuation Option and Sale to Third Party. In the event
of an exercise of the Program Option, an exercise of the Discontinuation Option or a sale of a discontinued or abandoned Program to GlaxoSmithKline or other third party, any and all corporate taxes required to be paid by Symphony Evolution as a
result of the receipt of the proceeds of such Program Option, Discontinuation Option or sale to a third party shall be satisfied by Symphony Evolution from such proceeds of such Program Option, Discontinuation Option or sale, as applicable.

  

	9.	Covenants. 

  
 9.1 Mutual Covenants. Each of Exelixis and Symphony Evolution covenants and agrees that, with respect to the Programs and any other rights
and obligations set forth in the Operative Documents, it shall: 
  
 (a) perform all of its obligations pursuant to this Agreement in material compliance with: (i) all applicable federal and state laws, statutes, rules, regulations and orders (including all applicable approval and qualification
requirements thereunder), including, without limitation, the Federal Food, Drug and Cosmetic Act and the regulations promulgated pursuant thereto; (ii) all applicable good clinical practices and guidelines; (iii) all applicable standard operating
procedures; (iv) all applicable Protocols; and (v) the provisions of this Agreement; 
  
 (b) keep complete, proper and separate books of record and account, including a record of all costs and expenses incurred, all charges made, all credits made and received, and all income derived in connection
with the operation of its business, all in accordance with GAAP; 
  
 (c) not employ (or, to the best of its knowledge without further duty of inquiry, shall not use any contractor or consultant that employs) any individual or entity debarred by the FDA (or subject to a similar sanction of any other
Regulatory Authority), or, to the best of its knowledge without further duty of inquiry, any individual who or entity which is the subject of an FDA debarment investigation or proceeding (or similar proceeding of any other Regulatory Authority), in
the conduct of the Programs; 
  
 (d) promptly deliver to
the other, upon receipt thereof, notice of all actions, suits, investigations, litigation and proceedings before any Governmental Authority, which would reasonably be expected to affect such Party’s ability to perform its obligations under this
Agreement; 
  
 (e) upon it receiving knowledge of a
material event or development with respect to any Program, such Party shall notify the other Party in writing within [ * ] of the receipt of such knowledge by any executive officer of such Party, provided that the failure to provide such
notice shall not impair or otherwise be deemed a waiver of any rights any Party may have arising from such material event. Furthermore, the provision of such notice of material event or development shall not be deemed an admission by the Party
providing such notice of its breach of any of its covenants, representations or obligations under the Operative Documents; and 
  

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 (f) with reasonable promptness, deliver to the other such data and information relating to the
ability of such Person to perform its obligations hereunder as from time to time may be reasonably requested by the other (subject to the maintenance of the confidentiality of any such information by the receiving Party). For the avoidance of doubt,
this Section 9.1(f) includes Exelixis’ obligations to provide financial and other necessary information to Symphony Evolution and the Manager to enable Symphony Evolution to fulfill its obligations to Exelixis under Section 5(d)
of the Purchase Option Agreement, and to enable the Manager to fulfill its obligations to Symphony Evolution and Exelixis under Sections 5(a) and 5(b) of the Management Services Agreement. 
  

	10.	Confidentiality. 

  
 10.1 Confidentiality Agreement. It is understood that during the course of this Agreement each of the Parties shall be bound by the terms of
the Confidentiality Agreement. In addition, the Parties’ employees, subcontractors and agents shall be bound by terms substantially similar to the Confidentiality Agreement. The foregoing shall not be construed to require Exelixis to amend or
supplement any of the agreements it entered into prior to the Closing Date, even if the confidentiality provisions in such agreements do not satisfy the foregoing requirement. 
  
 10.2 Permitted Disclosure of Information. The Parties agree that Exelixis shall have access to, and may use
and disclose the Clinical Plan and any existing or newly generated data or intellectual property developed with respect to the Programs (i) to GlaxoSmithKline or the Exelixis-GlaxoSmithKline Collaboration Committee in accordance with the mutual
agreements of Exelixis and GlaxoSmithKline, (ii) to obtain the assistance of one or more third parties to develop and/or commercialize the Programs subject to the terms of this Agreement, the other Operative Documents and appropriate confidentiality
agreements pursuant to Section 10.1 or as approved by Symphony Evolution, and (iii) through press releases, public presentations or other appropriate public disclosures; provided that all such disclosure under this Section 10.2
shall be subject to the terms of the Confidentiality Agreement. 
  

	11.	Options and Licensing. 

  
 11.1 Program Option. 
  
 (a) In consideration for entering into the Operative Documents to which both Exelixis and Symphony Evolution are parties, Symphony Evolution hereby
grants Exelixis an exclusive option (the “Program Option”) to purchase the rights to one Program at any time during the period (the “Program Option Period”) after Exelixis has, by itself or through its
subcontractor(s), [ * ] and before the earlier of (A) the termination of the Term, and (B) the eighteenth (18th) month anniversary of the Closing Date, in accordance with this Section 11.1. 
  
 (b) Exelixis may exercise the Program Option by delivery of a written
notice (the “Program Option Exercise Notice”) during the Program Option Period. The Program 
  

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 Option Exercise Notice shall be delivered on a Business Day to Holdings and Symphony Evolution and shall be irrevocable
once delivered. The date on which the Program Option Exercise Notice is first delivered to Holdings and Symphony Evolution is referred to as the “Program Option Exercise Date.” The Program Option Exercise Notice shall specify
a closing date for the settlement of the Program Option, which date shall not be less than [ * ]s after the Program Option Exercise Date. 
  
 (c) The exercise price (the “Program Option Exercise Price”) shall be an amount equal to the sum of (A) [ * ], plus
(B) an amount equal to [ * ], provided that such return thereon shall be calculated starting from [ * ] and through the Program Option Closing Date. In the event that, subsequent to its exercise of the Program Option, Exelixis
exercises the Purchase Option under the Purchase Option Agreement, the Purchase Option Exercise Price shall be reduced by an amount equal to the Program Option Exercise Price. 
  
 (d) The entire amount of the Program Option Exercise Price shall be paid in cash on the date specified in the Program
Option Exercise Notice (the “Program Option Closing Date”). 
  
 (e) Promptly after the Program Option Closing Date, the Parties hereby agree to amend the Novated and Restated Technology License Agreement and such other Operative Documents as may be required to reflect that
the Licensed Intellectual Property related to the applicable Program shall thereafter be the sole and exclusive property of Exelixis or its assignee or licensee. 
  
 (f) Within a reasonable time after the Program Option Closing Date, Symphony Evolution shall transfer and deliver to
Exelixis any and all materials, documents, files and other information relating to the applicable compound and Product (or, where necessary, copies thereof if such materials, documents, files or other information also relate to Programs (including
compounds and Products) that are not the subject of the Program Option), including without limitation any and all administrative files relating to the applicable compound and Product, and, to the extent applicable, any and all clinical and protocol
results, analytical methodologies, bulk and final product manufacturing processes, batch records, vendor information, validation documentation, regulatory documentation, patent information, regulatory filings, transfer of information related to
regulatory information and filings, pre-clinical and clinical data, adverse event data, regulatory correspondence, analyses, and manufacturing data. 
  
 (g) In the event that, following the Program Option Closing Date, either Party objects to the calculation of the portion of the Funded Capital
expended on the development of the applicable Program as of the Program Option Closing Date used to determine the final Program Option Exercise Price (the “Program Funding”), then, within [ * ] of the Program Option
Closing Date, such objecting party shall provide written notice to the other party (a “Program Purchase Price Dispute Notice”) specifying the amount disputed and the basis for the dispute, together with supporting
documentation reflecting the analysis of and justification for any re-computation made. In the event that a Program Purchase Price Dispute Notice is issued by either party, such dispute shall be resolved in accordance with the terms of Section
11.1(h). The Program Option Exercise Price shall be final, binding and conclusive, shall be non-appealable and shall not be subject to further review if the disputing party does not deliver a 
  

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 Program Purchase Price Dispute Notice within such [ * ] period. For the avoidance of doubt, nothing in this
Section 11.1(g) shall restrict or delay the Parties’ performance of those activities identified in this Agreement or the Novated and Restated Technology License Agreement as taking place following the exercise of the Program Option.

  
 (h) Program Option Exercise Price Adjustment.

  
 (i) In the event that either Party delivers to the
other a Program Purchase Price Dispute Notice within the time limit set forth in Section 11.1(g), then both Parties shall make good faith efforts to resolve any dispute relating to the calculation of the Program Funding through negotiations
for a period of [ * ] following the date on which a Program Purchase Price Dispute Notice is delivered. If the Parties agree on the calculation of the Program Funding (or a revision thereto) before or within such [ * ] period, or the
calculation of the Program Option Exercise Price becomes final pursuant to Section 11.1(g), and (x) the recalculated Program Funding results in a recalculated Program Option Exercise Price (including as revised through negotiations) that is
less than the Program Option Exercise Price paid on the Program Option Closing Date, then Symphony Evolution shall promptly, and in any event within [ * ] of the date on which the Program Option Exercise Price recalculation becomes final, pay
to Exelixis the amount by which the recalculated Program Option Exercise Price is less than Program Option Exercise Price paid on the Program Option Closing Date, or (y) the recalculated Program Funding results in a recalculated Program Option
Exercise Price (including as revised through negotiations) that is greater than the Program Option Exercise Price paid on the Program Option Closing Date, then Exelixis shall promptly, and in any event within [ * ] of the date on which the
recalculated Program Option Exercise Price becomes final, pay to Symphony Evolution the amount by which the recalculated Program Option Exercise Price is greater than the Program Option Exercise Price paid on the Program Option Closing Date. In the
event that neither of the conditions set forth in the previous clauses (x) and (y) exist, then no payment shall be made. 
  
 (ii) To the extent that any matter remains unresolved following negotiations during such [ * ] period (as determined by notice by any party
to the other party), the Parties shall jointly select an independent accountant of recognized national standing to resolve any remaining disagreements, which independent accountant shall not have provided services to either of the Parties or any of
their respective Affiliates during the five-year period preceding the date of its selection (the “Independent Accountant”). The Parties shall use their respective commercially reasonable efforts to cause such Independent
Accountant to make its determination of the Program Option Exercise Price (the “Final Program Option Exercise Price”) within [ * ] of accepting its selection. The decision of the Independent Accountant shall be a
final, binding and conclusive resolution of the parties’ dispute, shall be non-appealable and shall not be subject to further review. The costs and expenses of the Independent Accountant shall be split between the Parties in proportion to the
difference between the Final Program Option Exercise Price and the Program Option Exercise Price (recalculated, if applicable, pursuant to Section 11.1(h)(i)). Notwithstanding the foregoing, in any case, each Party shall be responsible for
the payment of its respective costs and expenses, including any attorneys’ and accountants’ fees (other than any accountants’ fees payable to the Independent Accountant, which shall be split between the Parties in accordance with this
Section 11.1(h)) incurred in 
  

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 connection with the dispute. If the Final Program Option Exercise Price is less than the Program Option Exercise Price
paid on the Program Option Closing Date, then Symphony Evolution shall promptly, and in any event within [ * ] of the date on which the Independent Accountant makes its determination of the Final Program Option Exercise Price, pay to Exelixis
the amount by which the Final Program Option Exercise Price is less than the Program Option Exercise Price paid on the Program Option Closing Date. If the Final Program Option Exercise Price is greater than the Program Option Exercise Price paid on
the Program Option Closing Date, then Exelixis shall promptly, and in any event within [ * ] of the date on which the Independent Accountant makes its determination of the Final Program Option Exercise Price, pay to Symphony Evolution the
amount by which the Final Program Option Exercise Price is greater than the Program Option Exercise Price paid on the Program Option Closing Date. In the event that neither of the conditions set forth in the previous two sentences exist, then no
payment shall be made. 
  
 11.2 Discontinuation Option.

  
 (a) A Program may only be discontinued or abandoned in
accordance with Section 4.2(g). In the event of such a Program discontinuation or abandonment during the Term, (i) Symphony Evolution shall so notify Exelixis and GlaxoSmithKline promptly and in writing of such discontinuance or abandonment,
and (ii) Exelixis shall have the right and option (the “Discontinuation Option”), exercisable for [ * ] after receipt of written notice from Symphony Evolution of such discontinuance or abandonment, to buy back the
Licensed Intellectual Property related to such discontinued or abandoned Program for a price (the “Discontinuation Price”) to be determined between the Parties, or, if the Parties are unable to come to a resolution, for a
Discontinuation Price determined in accordance with Section 11.2(c) hereof. If the Discontinuation Price is determined in accordance with Section 11.2(c), then such [ * ] period shall be extended by the time needed by the
Experts for such determination. Any Discontinuation Price paid under this Section 11.2(a) shall reduce the Purchase Option Exercise Price in the amount of such payment. 
  
 (b) Following the expiration of the Discontinuation Option without exercise by Exelixis, if Symphony Evolution
proposes to transfer or license the discontinued Program to a third party, then (i) Symphony Evolution shall so notify GlaxoSmithKline (with a copy to Exelixis) of its intention promptly and in writing, and (ii) GlaxoSmithKline shall have, for a
period of [ * ] after receipt of such written notice, the exclusive right to negotiate with Symphony Evolution for the acquisition or the license of the rights to such discontinued or abandoned Program. At GlaxoSmithKline’s request,
Symphony Evolution shall negotiate in good faith with GlaxoSmithKline the terms of such acquisition or license and upon any agreement of terms, shall enter into a binding agreement setting forth such terms. Following such [ * ] period,
Symphony Evolution may transfer or license such rights relating to such discontinued or abandoned Program to any third party. If Symphony Evolution so transfers or licenses such Program rights before the termination of the Term, all amounts that
Symphony Evolution receives from such third party shall reduce the Purchase Option Exercise Price in the amount of such payment. During the Term, under no circumstances may Symphony Evolution or Exelixis (unless Exelixis has exercised a
Discontinuation Option in respect of such Program) reinitiate work on a discontinued or abandoned Program. 
  

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 (c) If Exelixis and Symphony Evolution cannot agree on the Discontinuation Price, with respect to
Section 11.2(a), Exelixis and Symphony Evolution shall each appoint a nationally recognized expert in the field of pharmaceutical technology and licensing (each, an “Expert”) (that, in each case, has had no prior
dealings with either of Exelixis and Symphony Evolution in the preceding twelve (12) months), and such two (2) Experts shall appoint a third Expert. In accordance with this Section 11.2(c), such three (3) Experts shall jointly determine, or,
if all three (3) Experts shall not be able to agree on such Discontinuation Price as applicable, two (2) of such three (3) Experts shall jointly determine, the Discontinuation Price, which determination shall be made within [ * ] of the
appointment of the third Expert and, absent manifest error, shall be (i) binding and conclusive and (ii) the Discontinuation Price at which the Discontinuation Option shall be exercised by Exelixis. All costs and expenses incurred in appointing the
Experts shall be shared equally between Exelixis and Symphony Evolution. 
  
 11.3 Post-Term. Following the expiration or termination of the Term without exercise of the Purchase Option by Exelixis, Symphony Evolution may offer to transfer or license any of the Programs for which
Exelixis has not exercised its Program Option or Discontinuation Option to any third party, provided that, if Symphony Evolution proposes to transfer or license any such Program (other than a Program that was the subject of a Discontinuation
Option) to a third party, then (a) Symphony Evolution shall so notify GlaxoSmithKline (with a copy to Exelixis) of its intention promptly and in writing, and (b) GlaxoSmithKline shall have, for a period of [ * ] after receipt of such written
notice, the exclusive right to negotiate with Symphony Evolution for the acquisition or the license of the rights to any such Program (and Licensed Intellectual Property relating thereto, including without limitation Symphony Evolution
Enhancements), and for an additional [ * ] the right to negotiate on a non-exclusive basis for such rights. If such [ * ] period ends without Symphony Evolution and GlaxoSmithKline entering into an agreement governing the terms and
conditions of such acquisition or license, then Symphony Evolution may subsequently transfer or license such rights relating to such Program to any third party; provided, however, that if any new data is gained subsequent to such [
* ] period relating to a Program, Symphony shall, as soon as practicable thereafter and subject to the Operative Documents and customary confidentiality restrictions, disclose such new data to GlaxoSmithKline, to enable GlaxoSmithKline to
determine if it is interested in acquiring or licensing such Program within an additional [ * ] period, but only if Symphony Evolution has not, as of such time, entered into a binding agreement (including a binding letter of intent) for the
transfer or license of such Program to a third party. 
  

	12.	Representations and Warranties. 

  
 12.1 Exelixis Representations and Warranties. Exelixis hereby represents and warrants to Symphony Evolution and Holdings that, as of the
Effective Date: 
  
 (a) Organization. Exelixis is a
corporation, duly organized, validly existing and in good standing under the laws of the State of Delaware. 
  
 (b) Authority and Validity. Other than in respect of the exercise of the Program Option pursuant to Section 11.1 hereof and the
Discontinuation Option pursuant to Section 11.2 hereof (which are subject to future approval by Exelixis’ board of directors and potentially Exelixis’ stockholders if required by applicable NASDAQ or other stock exchange 
  

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AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 rules), Exelixis has all requisite corporate power and authority to execute, deliver and perform its obligations under
this Agreement and the Novated and Restated Technology License Agreement and to consummate the transactions contemplated thereby. The execution, delivery and performance by Exelixis of this Agreement and the Novated and Restated Technology License
Agreement and the consummation of the transactions contemplated thereby have been duly and validly authorized by all necessary action required on the part of Exelixis (other than as set forth in the Operative Documents, and in respect of the
exercise of the Program Option pursuant to Section 11.1 hereof and the Discontinuation Option pursuant to Section 11.2 hereof (which are subject to future approval by Exelixis’ board of directors and potentially Exelixis’
stockholders if required by applicable NASDAQ or other stock exchange rules)), and no other proceedings on the part of Exelixis are necessary to authorize this Agreement or the Novated and Restated Technology License Agreement or for Exelixis to
perform its obligations under this Agreement or the Novated and Restated Technology License Agreement. This Agreement and the Novated and Restated Technology License Agreement constitute the lawful, valid and legally binding obligations of Exelixis,
enforceable in accordance with their terms, except as the same may be limited by applicable bankruptcy, insolvency, reorganization, moratorium or similar laws affecting the enforcement of creditors’ rights generally and general equitable
principles regardless of whether such enforceability is considered in a proceeding at law or in equity. 
  
 (c) No Violation or Conflict. The execution, delivery and performance of this Agreement and the Novated and Restated Technology License
Agreement and the transactions contemplated thereby do not and will not (i) violate, conflict with or result in the breach of any provision of the Organizational Documents of Exelixis, (ii) conflict with or violate any law or Governmental Order
applicable to Exelixis or any of its assets, properties or businesses, or (iii) conflict with, result in any breach of, constitute a default (or event that with the giving of notice or lapse of time, or both, would become a default) under, require
any consent under, or give to others any rights of termination, amendment, acceleration, suspension, revocation or cancellation of, or result in the creation of any Encumbrance on any of the assets or properties of Exelixis, pursuant to, any note,
bond, mortgage or indenture, contract, agreement, lease, sublease, license, permit, franchise or other instrument or arrangement to which Exelixis is a party except, in the case of clauses (ii) and (iii), to the extent that such conflicts, breaches,
defaults or other matters would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect on Exelixis. 
  
 (d) Governmental Consents and Approvals. Other than any HSR Act Filings and Additional Regulatory Filings which, if the Program Option or
Discontinuation Option is exercised by Exelixis, will be obtained on or prior to the Program Option Closing Date or Discontinuation Option Closing Date, the execution, delivery and performance of this Agreement and the Novated and Restated
Technology License Agreement by Exelixis do not, and the consummation of the transactions contemplated thereby do not and will not, require any Governmental Approval which has not already been obtained, effected or provided, except with respect to
which the failure to so obtain, effect or provide would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect on Exelixis. 
  
 (e) Litigation. There are no actions by or against Exelixis pending before any Governmental Authority or, to
the knowledge of Exelixis, threatened to be brought by or before 
  

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AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 any Governmental Authority, that would, individually or in the aggregate, reasonably be expected to have a Material
Adverse Effect on Exelixis. There are no pending or, to the knowledge of Exelixis, threatened actions, to which Exelixis is a party (or is threatened to be named as a party) to set aside, restrain, enjoin or prevent the execution, delivery or
performance of this Agreement or the Operative Documents or the consummation of the transactions contemplated hereby or thereby by any party hereto or thereto. Exelixis is not subject to any Governmental Order (nor, to the knowledge of Exelixis, is
there any such Governmental Order threatened to be imposed by any Governmental Authority) that would, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect on Exelixis or a material adverse effect on the
Programs. 
  
 (f) No Contracts. Except as disclosed
on Schedule 12.1(f) hereto, there are no material contracts between Exelixis and any third party, including contractors, manufacturers or suppliers, used with or otherwise necessary for the Programs. With respect to the contracts disclosed on
Schedule 12.1(f) hereto, the absence of such contracts (due to the inability or impracticability of assigning such contracts to Symphony Evolution following a termination of this Agreement without the exercise of the Purchase Option) would
not have a material adverse effect on any of the Programs or on Symphony Evolution’s rights under the Novated and Restated Technology License Agreement. 
  
 12.2 Symphony Evolution Representations and Warranties. Symphony Evolution hereby represents and warrants to Exelixis that, as of the
Effective Date: 
  
 (a) Organization. Symphony
Evolution is a corporation, duly organized, validly existing and in good standing under the laws of the State of Delaware. 
  
 (b) Authority and Validity. Symphony Evolution has all requisite corporate power and authority to execute, deliver and perform its
obligations under this Agreement and the Novated and Restated Technology License Agreement and to consummate the transactions contemplated thereby. The execution, delivery and performance by Symphony Evolution of this Agreement and the Novated and
Restated Technology License Agreement and the consummation of the transactions contemplated thereby have been duly and validly authorized by all necessary action required on the part of Symphony Evolution, and no other proceedings on the part of
Symphony Evolution are necessary to authorize this Agreement or the Novated and Restated Technology License Agreement or for Symphony Evolution to perform its obligations under this Agreement or the Novated and Restated Technology License Agreement.
This Agreement and the Novated and Restated Technology License Agreement constitute the lawful, valid and legally binding obligations of Symphony Evolution, enforceable in accordance with its terms, except as the same may be limited by applicable
bankruptcy, insolvency, reorganization, moratorium or similar laws affecting the enforcement of creditors’ rights generally and general equitable principles regardless of whether such enforceability is considered in a proceeding at law or in
equity. 
  
 (c) No Violation or Conflict. The
execution, delivery and performance of this Agreement and the Novated and Restated Technology License Agreement and the transactions contemplated thereby do not and will not (i) violate, conflict with or result in the breach of any provision of the
Organizational Documents of Symphony Evolution, (ii) conflict with or violate 
  

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AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 any law or Governmental Order applicable to Symphony Evolution or any of its assets, properties or businesses, or (iii)
conflict with, result in any breach of, constitute a default (or event that with the giving of notice or lapse of time, or both, would become a default) under, require any consent under, or give to others any rights of termination, amendment,
acceleration, suspension, revocation or cancellation of, or result in the creation of any Encumbrance on any of the assets or properties of Symphony Evolution, pursuant to, any note, bond, mortgage or indenture, contract, agreement, lease, sublease,
license, permit, franchise or other instrument or arrangement to which Symphony Evolution is a party except, in the case of clauses (ii) and (iii), to the extent that such conflicts, breaches, defaults or other matters would not, individually or in
the aggregate, reasonably be expected to have a Material Adverse Effect on Symphony Evolution. 
  
 (d) Governmental Consents and Approvals. The execution, delivery and performance of this Agreement and the Novated and Restated Technology License Agreement by Symphony Evolution do not, and the
consummation of the transactions contemplated thereby do not and will not, require any Governmental Approval which has not already been obtained, effected or provided, except with respect to which the failure to so obtain, effect or provide would
not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect on Symphony Evolution. 
  
 (e) Litigation. There are no actions by or against Symphony Evolution pending before any Governmental Authority or, to the knowledge of
Symphony Evolution, threatened to be brought, by or before any Governmental Authority that would, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect on Symphony Evolution. There are no pending or, to the
knowledge of Symphony Evolution, threatened actions to which Symphony Evolution is a party (or is threatened to be named as a party) to set aside, restrain, enjoin or prevent the execution, delivery or performance of this Agreement or the Operative
Documents or the consummation of the transactions contemplated hereby or thereby by any party hereto or thereto. Symphony Evolution is not subject to any Governmental Order (nor, to the knowledge of Symphony Evolution, is there any such Governmental
Order threatened to be imposed by any Governmental Authority) that would, individually or in the aggregate reasonably be expected to have a Material Adverse Effect on Symphony Evolution or a material adverse effect on the Programs. 
  

	13.	Relationship Between Exelixis and Symphony Evolution. Nothing contained in this Agreement or any acts or omissions hereunder shall constitute or be construed so as to
create any joint venture or partnership relationship between Exelixis and Symphony Evolution, and the Parties acknowledge and agree that Exelixis is acting as an independent contractor in the performance of its obligations under this Agreement.

  

	14.	Change of Control. Exelixis will not, at any time during the Term, undergo a Change of Control, unless: 

  
 (a) the Surviving Entity [ * ]; or 
  
 (b) such Surviving Entity shall (i) [ * ]; (ii) have provided
to Symphony Evolution and Holdings a certificate executed by a duly authorized officer of such entity to the 
  

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 effect that (A) the [ * ] referred to in clause (i) above are [ * ], (B) such Change of Control does not
[ * ], and (C) [ * ], except to the extent that failure to make such [ * ] would not reasonably be expected to have a material adverse effect on the Programs or Symphony Evolution’s rights under the Operative Documents; and
(iii) arranged for an appropriate senior executive of the Surviving Entity to [ * ], including, but not limited to, the Surviving Entity’s commitment to [ * ] under the Operative Documents, as well as the strategic importance of
the [ * ] to the Surviving Entity. 
  

	15.	No Restrictions; Indemnification. 

  
 15.1 No Restrictions. Nothing in this Agreement shall limit or restrict the right of any director, officer or employee of Exelixis or any director,
officer, or employee of any of its subsidiaries or its Affiliates to engage in any other business or to devote his or her time and attention to the management or other aspects of any other business, whether of a similar or dissimilar nature, nor
limit or restrict the right of Exelixis or any of its affiliates to engage in any other business or to render services of any kind to any other Person. 
  
 15.2 Indemnification. 
  
 (a) To the greatest extent permitted by applicable law, Exelixis shall indemnify and hold harmless Symphony Evolution and RRD and each of their
respective Affiliates, officers, directors, employees, agents, members, managers, successors and assigns (each, a “Symphony Indemnified Party”), and Symphony Evolution shall indemnify and hold harmless Exelixis, and its
Affiliates and each of their respective officers, directors, employees, agents (other than Subcontractors), members, managers, successors and assigns (each, an “Exelixis Indemnified Party”), from and against any and all
claims, losses, diminution in value, costs, interest, awards, judgments, penalties, fees (including reasonable fees for attorneys and other professionals), court costs, liabilities, damages and expenses incurred by any Symphony Indemnified Party or
Exelixis Indemnified Party (irrespective of whether any such Indemnified Party is a party to the action for which indemnification hereunder is sought) (hereinafter, a “Loss”) as a result of, or arising out of, or relating to
any and all third party suits, claims, actions, proceedings or demands based upon: 
  
 (i) in the case of Exelixis being the Indemnifying Party, (A) any breach of any representation or warranty made by Exelixis herein or in any certificate, instrument or document delivered hereunder, (B) any
breach of any covenant, agreement or obligation of Exelixis contained herein, or in any certificate, instrument or document delivered hereunder, except to the extent such covenant, agreement or obligation relates to Exelixis’ performance under
the Development Plan, (C) any gross negligence or willful misconduct of Exelixis (and not that of its Subcontractors) in connection with Exelixis’ performance of its obligations under this Agreement (including the Development Plan), (D) any
action undertaken or performed by or on behalf of Exelixis prior to, and including, the Closing Date that relates to the Programs or the Products, (E) the negligence or willful misconduct of a Subcontractor or a 
  

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 Subcontractor’s failure to follow applicable law, regulations or protocols, in each case solely to the extent that
such Subcontractor is obligated pursuant to the applicable Subcontracting Agreement to indemnify Exelixis for such Loss, it being understood and agreed by the Parties that (1) if both Symphony Indemnified Parties and Exelixis Indemnified Parties
incur Losses addressed in this Section 15.2(a)(i)(E) and the total amount received from such Subcontractor as a result of such indemnification obligation is less than the total applicable Losses suffered by the Symphony Indemnified Parties
and Exelixis Indemnified Parties, then Exelixis shall distribute among the relevant Symphony Indemnified Parties a total amount equal to [ * ] of the such amount received from such Subcontractor (which amount shall be decreased to the extent
that the total applicable Losses suffered by the Symphony Indemnified Parties is less that such [ * ] or increased to the extent that the total applicable Losses suffered by the Exelixis Indemnified Parties is less than the [ * ]
otherwise to be retained by Exelixis hereunder) and (2) if the Symphony Indemnified Parties and Exelixis Indemnified Parties are held to be joint and severally liable with respect to any Losses under this Section 15.2(a)(i)(E) and such Losses
exceed the total amount received from such Subcontractor as a result of such indemnification obligation, the recovery from such Subcontractor shall first be applied to such Losses and notwithstanding the joint and several liability judgment, the
remainder of such Losses shall be shared equally by Symphony Evolution and Exelixis, (F) activities that are solely related to Exelixis funded research pursuant to Section 4.3, provided that such research pertains to a new Protocol developed
by Exelixis, rather than an extension, continuation or modification of any Protocol included in the Development Plan, or (G) in the event Licensor exercises a Program Option or Discontinuation Option for a Program, any action undertaken and/or
performed by or on behalf of Licensor after the Program Option Closing Date or Discontinuation Closing Option Date and relating to the Product that was the subject of such Program (including the development, manufacture, use, handling, storage, sale
or other disposition of such Product); in each case, except (1) with respect to Losses for which Exelixis is entitled to indemnification under this Article 15 or (2) to the extent such Loss arises from the gross negligence or willful
misconduct of a Symphony Indemnified Party; and 
  
 (ii)
in the case of Symphony Evolution being the Indemnifying Party, (A) any breach of any representation or warranty made by Symphony Evolution herein or in any certificate, instrument or document delivered hereunder, (B) any breach of any covenant,
agreement or obligation of Symphony Evolution contained herein or in any certificate, instrument or document delivered hereunder, (C) any and all activities by or on behalf of the Parties under the Development Plan (including (1) any activities
performed by RRD pursuant to the Management Services Agreement and (2) any claim arising out of any condition caused by XL647, XL784, XL999 or the Products after the Closing Date but prior to the expiration of the Term), (D) any gross negligence or
willful misconduct of Symphony Evolution (and not that of its subcontractors) in connection with Symphony Evolution’s performance of its obligations under this Agreement, or (E) the development, manufacture, use, handling, storage, sale or
other disposition of the Products (including in the course of conducting the Programs) during the Term (except with respect to the development, manufacture, use, handling, storage, sale or other disposition, after Exelixis’ exercise of the
Program Option or Discontinuation Option as applicable, of Products covered under Section 15.2(a)(i)(G)); in each case, except (1) with respect to Losses for which Symphony Evolution is entitled to indemnification under this Article 15, or
(2) Losses deemed to have arisen from the breach by Exelixis of any covenant, agreement 
  

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 or obligation under this Agreement that relates to Exelixis’ performance under the Development Plan, as determined
by a court, arbitrator or pursuant to a settlement agreement, or (3) to the extent such Loss arises from the gross negligence or willful misconduct of an Exelixis Indemnified Party. Solely for the purposes of claims arising under (C) above,
Subcontractors shall also be deemed to be Exelixis Indemnified Parties. 
  
 To the
extent that the foregoing undertaking by Exelixis or Symphony Evolution may be unenforceable for any reason, such Party shall make the maximum contribution to the payment and satisfaction of any Loss that is permissible under applicable law.

  
 (b) Notice of Claims. Any Indemnified Party that
proposes to assert a right to be indemnified under this Section 15.2 shall notify Exelixis or Symphony Evolution, as applicable (the “Indemnifying Party”), promptly after receipt of notice of commencement of any
action, suit or proceeding against such Indemnified Party (an “Indemnified Proceeding”) in respect of which a claim is to be made under this Section 15.2, or the incurrence or realization of any Loss in respect of
which a claim is to be made under this Section 15.2, of the commencement of such Indemnified Proceeding or of such incurrence or realization, enclosing a copy of all relevant documents, including all papers served and claims made, but the
omission so to notify the applicable Indemnifying Party promptly of any such Indemnified Proceeding or incurrence or realization shall not relieve (x) such Indemnifying Party from any liability that it may have to such Indemnified Party under this
Section 15.2 or otherwise, except, as to such Indemnifying Party’s liability under this Section 15.2, to the extent, but only to the extent, that such Indemnifying Party shall have been prejudiced by such omission, or (y) any
other indemnitor from liability that it may have to any Indemnified Party under the Operative Documents. 
  
 (c) Defense of Proceedings. In case any Indemnified Proceeding shall be brought against any Indemnified Party, it shall notify the
applicable Indemnifying Party of the commencement thereof as provided in Section 15.2(b), and such Indemnifying Party shall be entitled to participate in, and provided such Indemnified Proceeding involves a claim solely for money damages and
does not seek an injunction or other equitable relief against the Indemnified Party and is not a criminal or regulatory action, to assume the defense of, such Indemnified Proceeding with counsel reasonably satisfactory to such Indemnified Party, and
after notice from such Indemnifying Party to such Indemnified Party of such Indemnifying Party’s election so to assume the defense thereof and the failure by such Indemnified Party to object to such counsel within [ * ] following its
receipt of such notice, such Indemnifying Party shall not be liable to such Indemnified Party for legal or other expenses related to such Indemnified Proceedings incurred after such notice of election to assume such defense except as provided below
and except for the reasonable costs of investigating, monitoring or cooperating in such defense subsequently incurred by such Indemnified Party reasonably necessary in connection with the defense thereof. Such Indemnified Party shall have the right
to employ its counsel in any such Indemnified Proceeding, but the fees and expenses of such counsel shall be at the expense of such Indemnified Party unless: 
  

(i) the employment of counsel by such Indemnified Party at the expense of the applicable Indemnifying Party has been authorized in writing by
such Indemnifying Party; 
  

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 (ii) such Indemnified Party shall have reasonably concluded in its good faith (which conclusion
shall be determinative unless a court determines that such conclusion was not reached reasonably and in good faith) that there is or may be a conflict of interest between the applicable Indemnifying Party and such Indemnified Party in the conduct of
the defense of such Indemnified Proceeding or that there are or may be one or more different or additional defenses, claims, counterclaims, or causes of action available to such Indemnified Party (it being agreed that in any case referred to in this
clause (ii) such Indemnifying Party shall not have the right to direct the defense of such Indemnified Proceeding on behalf of the Indemnified Party); 
  
 (iii) the applicable Indemnifying Party shall not have employed counsel reasonably acceptable to the Indemnified Party to assume the defense of
such Indemnified Proceeding within a reasonable time after notice of the commencement thereof (provided, however, that this clause shall not be deemed to constitute a waiver of any conflict of interest that may arise with respect to
any such counsel); or 
  
 (iv) any counsel employed by the
applicable Indemnifying Party shall fail to timely commence or diligently conduct the defense of such Indemnified Proceeding; 
  
 in each of which cases the fees and expenses of counsel for such Indemnified Party shall be at the expense of such Indemnifying Party. Only one counsel
shall be retained by all Indemnified Parties with respect to any Indemnified Proceeding, unless counsel for any Indemnified Party reasonably concludes in good faith (which conclusion shall be determinative unless a court determines that such
conclusion was not reached reasonably and in good faith) that there is or may be a conflict of interest between such Indemnified Party and one or more other Indemnified Parties in the conduct of the defense of such Indemnified Proceeding or that
there are or may be one or more different or additional defenses, claims, counterclaims, or causes or action available to such Indemnified Party. 
  
 (d) Settlement. Without the prior written consent of such Indemnified Party, such Indemnifying Party shall not settle or compromise, or
consent to the entry of any judgment in, any pending or threatened Indemnified Proceeding, unless such settlement, compromise, consent or related judgment (i) includes an unconditional release of such Indemnified Party from all liability for Losses
arising out of such claim, action, investigation, suit or other legal proceeding, (ii) provides for the payment of money damages as the sole relief for the claimant (whether at law or in equity), (iii) involves no finding or admission of any
violation of law or the rights of any Person by the Indemnified Party, and (iv) is not in the nature of a criminal or regulatory action. No Indemnified Party shall settle or compromise, or consent to the entry of any judgment in, any pending or
threatened Indemnified Proceeding in respect of which any payment would result hereunder or under the Operative Documents without the prior written consent of the Indemnifying Party, such consent not to be unreasonably conditioned, withheld or
delayed. 
  

	16.	LIMITATION OF LIABILITIES. 

  
 16.1 Between the Parties. TO THE GREATEST EXTENT PERMITTED BY APPLICABLE LAW, NEITHER PARTY NOR ANY OF THEIR RESPECTIVE DIRECTORS,

  

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 OFFICERS, MEMBERS, MANAGERS, EMPLOYEES, INDEPENDENT CONTRACTORS OR AGENTS (INCLUDING RRD) SHALL HAVE ANY LIABILITY OF ANY
TYPE (INCLUDING, BUT NOT LIMITED TO, CLAIMS IN CONTRACT, NEGLIGENCE AND TORT LIABILITY) FOR ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES, INCLUDING, BUT NOT LIMITED TO, THE LOSS OF OPPORTUNITY, LOSS OF USE OR LOSS OF REVENUE OR PROFIT
IN CONNECTION WITH OR ARISING OUT OF THIS AGREEMENT OR THE SERVICES PERFORMED HEREUNDER, EVEN IF SUCH DAMAGES MAY HAVE BEEN FORESEEABLE. THE FOREGOING SHALL NOT LIMIT EITHER PARTY’S INDEMNIFICATION OBLIGATIONS PURSUANT TO SECTION 15.2
AND SHALL NOT APPLY TO BREACHES OF ITS CONFIDENTIALITY OBLIGATIONS PURSUANT TO ARTICLE 10. 
  
 16.2 Pursuant to the Management Services Agreement. Each Party hereby acknowledges and agrees that, pursuant to Sections 9(g) and (h)
of the Management Services Agreement, RRD has expressly disclaimed all liability for (a) any claim arising out of any condition caused by or allegedly caused by the activities carried out by (or within the authority of) Exelixis (and such
Subcontractors and vendors it may retain) hereunder, or for any liability arising under the Novated and Restated Technology License Agreement with respect to any license or sublicense thereunder in relation to the activities carried out by (or
within the authority of) Exelixis (and such Subcontractors and vendors it may retain) hereunder, and (b) supervising, compensating or discharging, or any other liability to or with respect to, any vendor retained by Exelixis (or, in the case of a
vendor engaged by both RRD and Exelixis, to and for such vendor to the extent that such vendor performs services for Exelixis), except that RRD shall make payments out of an account held in the name of Symphony Evolution to reimburse Exelixis, in
accordance with Article 8 and Annex E of this Agreement, for costs and expenses incurred by Exelixis in connection with the engagement of such vendors by Exelixis for the performance of services contemplated under the Development Plan. 

 

	17.	Term and Termination. 

  
 17.1 Term. This Agreement shall be effective as of the Closing Date and shall expire on the last day of the Term, unless the Agreement is
earlier terminated as specified in this Article 17. 
  
 17.2 Termination for Exelixis’ Breach. 
  
 (a) At any time if Exelixis is in material default or breach of this Agreement that has resulted in, or would reasonably be expected to result in, a material adverse effect on the Programs or Symphony Evolution’s rights under
the Operative Documents, and Exelixis does not cure such breach within [ * ] after its receipt of written notice thereof from Symphony Evolution, then Symphony Evolution may by subsequent written notice to Exelixis terminate this Agreement.
Such cure period may be extended to [ * ] if (i) Exelixis believes that such breach can be cured within [ * ] of Exelixis’ receipt of Symphony Evolution’s written notice of such breach (and notifies Symphony Evolution in
writing of such belief and the basis for such belief) and (ii) Symphony Evolution, acting reasonably, agrees. 
  

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 (b) In the event that Symphony Evolution terminates this Agreement pursuant to Section
17.2(a) above, Exelixis may exercise its Purchase Option, pursuant to Section 1(c)(v) of the Purchase Option Agreement, within [ * ] of receiving such notice of termination from Symphony Evolution. 
  
 17.3 Termination for Symphony Evolution’s Breach. Exelixis
may terminate this Agreement at any time upon written notice to Symphony Evolution if Symphony Evolution is in material default or breach of this Agreement that has resulted in, or would reasonably be expected to result in, a material adverse effect
on the Programs or Exelixis’ rights under the Operative Documents, and such material default or breach continues unremedied for a period of [ * ] after written notice thereof is delivered to Symphony Evolution. 
  
 17.4 Termination of License Agreement. This Agreement shall
automatically terminate upon the termination of the Novated and Restated Technology License Agreement. 
  
 17.5 Survival. 
  
 (a) The agreements and covenants of the Parties set forth in Articles 10, 15, 16 and 18 and Section 6.8 shall survive any expiration or termination
of this Agreement. 
  
 (b) If Exelixis does not exercise
the Purchase Option, in addition to the provisions specified in Section 17.5(a), the following agreements and covenants of the Parties shall also survive such expiration: Sections 5.4 and 11.3. 
  
 (c) In the event that Exelixis terminates this Agreement pursuant to
Section 17.3 above, in addition to the provisions specified in Section 17.5(a), the following agreements and covenants of the Parties shall also survive such expiration: Section 8.2 (to the extent such costs and expenses have
been incurred or become uncancellable prior to such termination). 
  

	18.	Miscellaneous. 

  
 18.1 No Petition. Exelixis covenants and agrees that, prior to the date which is one (1) year and one (1) day after the expiration of the
Term, Exelixis will not institute or join in the institution of any bankruptcy, insolvency, reorganization or similar proceeding against Symphony Evolution. The provisions of this Section 18.1 shall survive the termination of this Agreement.

  
 18.2 Notices. Any notice, request, demand,
waiver, consent, approval or other communication which is required or permitted to be given to any Party shall be in writing and shall be deemed given only if delivered to the Party personally or sent to the Party by 

  

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facsimile transmission (promptly followed by a hard-copy delivered in accordance with this Section 18.2), by next Business Day delivery by a
nationally recognized courier service, or by registered or certified mail (return receipt requested), with postage and registration or certification fees thereon prepaid, addressed to the Party at its address set forth below: 
  
 Exelixis: 
 Exelixis, Inc. 
 170 Harbor Way 
 South San Francisco, CA 94083 
 Attention: Corporate Secretary 
 Facsimile: (650) 837-7951 
  
 Symphony Evolution: 
  
 Symphony Evolution, Inc. 
 7361 Calhoun Place, Suite 325 
 Rockville, MD 20850 
 Attn: Charles W. Finn, Ph.D. 
 Facsimile: (301) 762-6154 
  
 Holdings: 
  
 Symphony Evolution Holdings LLC 
 7361 Calhoun Place, Suite 325 
 Rockville, MD 20850 
 Attn: Joseph P. Clancy 
 Facsimile: (301) 762-6154 
  
 with copies to: 
  
 Symphony Capital Partners, L.P. 
 875 Third Avenue 
 18th Floor 
 Attn: Mark Kessel 
 New York, NY 10022 
 Facsimile: (212) 632-5401 
  
 and 
  
 Symphony Strategic Partners, LLC 
 875 Third Avenue 
 18th Floor 
 New York, NY 10022 
 Attn: Mark Kessel 
 Facsimile: (212) 632-5401 
  
 or to such other address as such Party may from time to time specify by notice given in the manner provided herein to each other Party
entitled to receive notice hereunder. 
  

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AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 18.3 Governing Law; Consent to Jurisdiction and Service of Process. 
  
 (a) This Agreement shall be governed by, and construed in accordance
with, the laws of the State of New York. 
  
 (b) Each of
the Parties hereby irrevocably and unconditionally submits, for itself and its property, to the nonexclusive jurisdiction of any New York State court or federal court of the United States of America sitting in The City of New York, Borough of
Manhattan, and any appellate court from any jurisdiction thereof, in any action or proceeding arising out of or relating to this Agreement, or for recognition or enforcement of any judgment, and each of the Parties hereby irrevocably and
unconditionally agrees that all claims in respect of any such action or proceeding may be heard and determined in any such New York State court or, to the fullest extent permitted by law, in such federal court. Each of the Parties agrees that a
final judgment in any such action or proceeding shall be conclusive and may be enforced in other jurisdictions by suit on the judgment or in any other manner provided by law. Nothing in this Agreement shall affect any right that any Party may
otherwise have to bring any action or proceeding relating to this Agreement. 
  
 (c) Each of the Parties irrevocably and unconditionally waives, to the fullest extent it may legally and effectively do so, any objection that it may now or hereafter have to the laying of venue of any suit,
action or proceeding arising out of or relating to this Agreement in any New York State or federal court. Each of the Parties hereby irrevocably waives, to the fullest extent permitted by law, the defense of an inconvenient forum to the maintenance
of such action or proceeding in any such court. 
  
 18.4
Third-Party Beneficiary. Each of the Parties hereto agrees that GlaxoSmithKline shall be a third-party beneficiary as to Sections 10.2, 11.1(f) and 11.3 of this Agreement, Symphony Evolution’s investors shall be third-party
beneficiaries as to Section 7.5, RRD shall be a third-party beneficiary as to Sections 9.1(f), 15.2, 16.1 and 16.2, and Subcontractors shall be third-party beneficiaries as to Section 15.2(a)(ii)(C). This provision shall survive
the termination of this Agreement. 
  
 18.5 Waiver of Jury
Trial. EACH OF THE PARTIES HERETO IRREVOCABLY WAIVES ALL RIGHT TO TRIAL BY JURY IN ANY ACTION, PROCEEDING OR COUNTERCLAIM (WHETHER BASED ON CONTRACT, TORT OR OTHERWISE) ARISING OUT OF OR RELATING TO THIS AGREEMENT. 
  
 18.6 Entire Agreement. This Agreement (including any Annexes,
Schedules, Exhibits or other attachments hereto) constitutes the entire agreement between the Parties with respect to the matters covered hereby, and no oral or written statement may be used to interpret or vary the meaning of the terms and
conditions hereof. This Agreement supersedes all prior agreements and understanding with respect to such matters between the Parties, including the Research and Development Agreement but excluding the Operative Documents. 
  

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AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 18.7 Amendment; Successors; Assignment; Counterparts. 
  
 (a) The terms of this Agreement shall not be altered, modified,
amended, waived or supplemented in any manner whatsoever except by a written instrument signed by each of the Parties. 
  
 (b) Except as set forth in Section 18.4 hereof, nothing expressed or implied herein is intended or shall be construed to confer upon or to
give to any Person, other than the Parties, any right, remedy or claim under or by reason of this Agreement or of any term, covenant or condition hereof, and all the terms, covenants, conditions, promises and agreements contained herein shall be for
the sole and exclusive benefit of the Parties and their successors and permitted assigns. 
  
 (c) This Agreement may not be assigned by either Party hereto without the prior written consent of the other part; provided that, in the event Exelixis undergoes a Change of Control in compliance with
Article 14 hereof, Exelixis may assign this Agreement to its Successor Entity. 
  
 (d) This Agreement may be executed in one or more counterparts, each of which, when executed, shall be deemed an original but all of which taken together shall constitute one and the same Agreement. 

 
 18.8 Severability. If any term or other provision of this
Agreement is invalid, illegal or incapable of being enforced by any rule of law or public policy, all other conditions and provisions of this Agreement shall nevertheless remain in full force and effect so long as the economic or legal substance of
the transactions contemplated hereby is not affected in a manner materially adverse to either party. Upon such determination that any term or other provision is invalid, illegal or incapable of being enforced, the parties hereto shall negotiate in
good faith to modify this Agreement so as to effect the original intent of the parties as closely as possible in an acceptable manner to the end that the transactions contemplated hereby are fulfilled to the extent possible. 
  
 [ SIGNATURES FOLLOW ON NEXT PAGE ] 
  

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AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 IN WITNESS WHEREOF, the Parties hereto have caused this Agreement to be executed as of the day and year
above written. 
  

			
	SYMPHONY EVOLUTION HOLDINGS LLC
		
	 By:
	 	 Symphony Capital Partners, L.P.,
 its Manager

		
	 By:
	 	 Symphony Capital GP, L.P.,
 its general partner

		
	 By:
	 	 Symphony GP, LLC,
 its general partner

		
	 By:
	 	 /s/ Mark Kessel

	 	 	 Name: Mark Kessel

	 	 	 Title: Managing Member

	
	SYMPHONY EVOLUTION, INC.
		
	 By:
	 	 /s/ Harri V. Taranto

	 	 	 Name: Harri V. Taranto

	 	 	 Title: Chairman of the Board

	
	EXELIXIS, INC.
		
	 By:
	 	 /s/ Christoph Pereira

	 	 	 Name: Christoph Pereira

	 	 	 Title: Vice President, Legal Affairs and Secretary

  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED
AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 ANNEX A 
  
 CERTAIN DEFINITIONS 
  
 “$” means United States dollars. 
  
 “Accredited Investor” has the meaning set forth in Rule 501(a) of Regulation D promulgated under the Securities Act of 1933, as
amended. 
  
 “Act” means the Delaware
Limited Liability Company Act, 6 Del. C. § 18-101 et seq. 
  
 “Additional Funds” has the meaning set forth in Section 2(b) of the Funding Agreement. 
  
 “Additional Funding Date” has the meaning set forth in Section 3 of the Funding Agreement. 
  
 “Additional Party” has the meaning set forth in
Section 12 of the Confidentiality Agreement. 
  
 “Additional Regulatory Filings” means such Governmental Approvals as required to be made under any law applicable to the purchase of the Symphony Evolution Equity Securities under the Agreement. 
  
 “Ad Hoc Meeting” has the meaning set forth in
Paragraph 6 of Annex B to the Amended and Restated Research and Development Agreement. 
  
 “Adjusted Capital Account Deficit” has the meaning set forth in Section 1.01 of the Holdings LLC Agreement. 
  
 “Affected Member” has the meaning set forth in Section 27 of the Investors LLC Agreement.

  
 “Affiliate” means, with respect to any
Person (i) any Person directly or indirectly controlling, controlled by or under common control with such Person, (ii) any officer, director, general partner, member or trustee of such Person, or (iii) any Person who is an officer, director, general
partner, member or trustee of any Person described in clauses (i) or (ii) of this sentence. For purposes of this definition, the terms “controlling,” “controlled by” or “under common control with” shall mean the
possession, direct or indirect, of the power to direct or cause the direction of the management and policies of a Person or entity, whether through the ownership of voting securities, by contract or otherwise, or the power to elect at least 50% of
the directors, managers, general partners, or persons exercising similar authority with respect to such Person or entities. 

  

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AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 “Amended and Restated Research and Development Agreement” means the Amended and
Restated Research and Development Agreement dated as of June 9, 2005, among Exelixis, Holdings and Symphony Evolution. 
  
 “Asset Value” has the meaning set forth in Section 1.01 of the Holdings LLC Agreement. 
  
 “Auditors” means an independent certified public
accounting firm of recognized national standing. 
  
 “A
Warrant Date” has the meaning set forth in Section 2.04 of the Warrant Purchase Agreement. 
  
 “A Warrants” has the meaning set forth in Section 2.01 of the Warrant Purchase Agreement. 
  
 “A Warrant Shares” has the meaning set forth in
Section 2.01 of the Warrant Purchase Agreement. 
  
 “Bankruptcy Code” means the United States Bankruptcy Code. 
  
 “Bloomberg” means Bloomberg L.P., a multimedia based distributor of information services, including data and analysis for financial markets and businesses. 
  
 “Bloomberg Screen” means the display page designated
on the Bloomberg service (or such other page as may replace that page on that service) for the purpose of displaying prices or bids of Exelixis Common Stock. 
  
 “Business Day” means any day other than Saturday, Sunday or any other day on which commercial banks in The City of New York or the
City of San Francisco are authorized or required by law to remain closed. 
  
 “B Warrants” has the meaning set forth in Section 2.02 of the Warrant Purchase Agreement. 
  
 “B Warrant Date” has the meaning set forth in Section 2.02 of the Warrant Purchase Agreement. 
  
 “B Warrant Shares” has the meaning set forth in
Section 2.05 of the Warrant Purchase Agreement. 
  
 “Capital Contributions” has the meaning set forth in Section 1.01 of the Holdings LLC Agreement. 
  
 “Capitalized Leases” means all leases that have been or should be, in accordance with GAAP, recorded as capitalized leases.

  

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AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 “Cash Available for Distribution” has the meaning set forth in Section 1.01 of
the Holdings LLC Agreement. 
  
 “Chair”
has the meaning set forth in Paragraph 4 of Annex B to the Amended and Restated Research and Development Agreement. 
  
 “Change of Control” means and includes the occurrence of any of the following events, but specifically excludes (i) acquisitions
of capital stock directly from Exelixis for cash, whether in a public or private offering, (ii) sales of capital stock by stockholders of Exelixis, and (iii) acquisitions of capital stock by or from any employee benefit plan or related trust:

  
 (a) the merger, reorganization or consolidation of Exelixis
into or with another corporation or legal entity in which Exelixis’ stockholders holding the right to vote with respect to matters generally immediately preceding such merger, reorganization or consolidation, own less than fifty percent (50%)
of the voting securities of the surviving entity; or 
  
 (b) the
sale of all or substantially all of Exelixis’ assets or business. 
  
 “Class A Member” means a holder of a Class A Membership Interest. 
  
 “Class A Membership Interest” means a Class A Membership Interest in Holdings. 
  
 “Class B Member” means a holder of a Class B
Membership Interest. 
  
 “Class B Membership
Interest” means a Class B Membership Interest in Holdings. 
  
 “Class C Member” means a holder of a Class C Membership Interest. 
  
 “Class C Membership Interest” means a Class C Membership Interest in Holdings. 
  
 “Class D Member” means a holder of a Class D
Membership Interest. 
  
 “Class D Membership
Interest” means a Class D Membership Interest in Holdings. 
  
 “Clinical Budget” has the meaning set forth in Section 4.1 of the Amended and Restated Research and Development Agreement. 
  
 “Clinical Plan” has the meaning set forth in Section 4.1 of the Amended and Restated Research and Development Agreement.

  
 “Closing Date” means June 9, 2005.

  

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AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 “CMC” means the chemistry, manufacturing and controls documentation as required
for filings with Regulatory Authority relating to the manufacturing, production and testing of drug products. 
  
 “Code” means the Internal Revenue Code of 1986, as amended from time to time. 
  
 “Committed Capital” means
$80,000,000.00. 
  
 “Common Stock”
means the common stock, par value $0.01 per share, of Symphony Evolution. 
  
 “Company Expenses” has the meaning set forth in Section 5.09 of the Holdings LLC Agreement. 
  
 “Company Property” has the meaning set forth in Section 1.01 of the Holdings LLC Agreement. 
  
 “Confidential Information” has the meaning set forth
in Section 2 of the Confidentiality Agreement. 
  
 “Confidentiality Agreement” means the Confidentiality Agreement, dated as of June 9, 2005, among Symphony Evolution, Holdings, Exelixis, each Symphony Fund, SCP, SSP, Investors, Symphony Capital, RRD and Daniel F.
Hoth, M.D., Herbert J. Conrad, and Alastair J.J. Wood, M.D. 
  
 “Conflict Transaction” has the meaning set forth in Article IX of the Symphony Evolution Charter. 
  
 “Control” means, with respect to any material, information or intellectual property right, that a Party owns or has a license to
such item or right, and has the ability to grant the other Party access, a license or a sublicense (as applicable) in or to such item or right as provided in the Operative Documents without violating the terms of any agreement or other arrangement
with any third party. 
  
 “C Warrants” has
the meaning set forth in Section 2.03 of the Warrant Purchase Agreement. 
  
 “C Warrant Date” has the meaning set forth in Section 2.06 of the Warrant Purchase Agreement. 
  
 “C Warrant Shares” has the meaning set forth in Section 2.03 of the Warrant Purchase Agreement. 
  
 “Debt” of any Person means, without
duplication: 
  
 (a) all indebtedness of such Person for borrowed
money, 
  
 (b) all obligations of such Person for the deferred
purchase price of property or services (other than any portion of any trade payable obligation that shall not have remained unpaid for 91 days or more from the later of (A) the original due date of such portion and (B) the customary payment date in
the industry and relevant market for such portion), 

  

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AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 (c) all obligations of such Person evidenced by bonds, notes, debentures or other similar instruments,

  
 (d) all obligations of such Person created or arising under
any conditional sale or other title retention agreement with respect to property acquired by such Person (whether or not the rights and remedies of the seller or lender under such agreement in an event of default are limited to repossession or sale
of such property), 
  
 (e) all Capitalized Leases to which such
Person is a party, 
  
 (f) all obligations, contingent or
otherwise, of such Person under acceptance, letter of credit or similar facilities, 
  
 (g) all obligations of such Person to purchase, redeem, retire, defease or otherwise acquire for value any Equity Securities of such Person, 
  
 (h) the net amount of all financial obligations of such Person in respect of Hedge Agreements, 
  
 (i) the net amount of all other financial obligations of such Person under
any contract or other agreement to which such Person is a party, 
  
 (j) all Debt of other Persons of the type described in clauses (a) through (i) above guaranteed, directly or indirectly, in any manner by such Person, or in effect guaranteed, directly or indirectly, by such Person through an agreement (A)
to pay or purchase such Debt or to advance or supply funds for the payment or purchase of such Debt, (B) to purchase, sell or lease (as lessee or lessor) property, or to purchase or sell services, primarily for the purpose of enabling the debtor to
make payment of such Debt or to assure the holder of such Debt against loss, (C) to supply funds to or in any other manner invest in the debtor (including any agreement to pay for property or services irrespective of whether such property is
received or such services are rendered) or (D) otherwise to assure a creditor against loss, and 
  
 (k) all Debt of the type described in clauses (a) through (i) above secured by (or for which the holder of such Debt has an existing right, contingent or
otherwise, to be secured by) any Encumbrance on property (including accounts and contract rights) owned or held or used under lease or license by such Person, even though such Person has not assumed or become liable for payment of such Debt.

  
 “Development Budget” means the budget
for the implementation of the Development Plan that is agreed upon by Exelixis and Symphony Evolution as of the Effective Date, as may be revised from time to time in accordance with the Development Committee Charter and the Amended and Restated
Research and Development Agreement. 
  
 “Development
Committee” has the meaning set forth in Article 3 of the Amended and Restated Research and Development Agreement. 
  
 “Development Committee Charter” has the meaning set forth in Article 3 of the Amended and Restated Research and Development
Agreement. 

  

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AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 “Development Committee Member” has the meaning set forth in Paragraph 1 of Annex
B to the Amended and Restated Research and Development Agreement. 
  
 “Development Plan” means the development plan, covering all the Programs, agreed to by Exelixis and Symphony Evolution as of the Effective Date, as may be revised from time to time in accordance with the Development
Committee Charter and the Amended and Restated Research and Development Agreement. 
  
 “Directors” has the meaning set forth in the Preliminary Statement of the Indemnification Agreement. 
  
 “Disclosing Party” has the meaning set forth in Section 3 of the Confidentiality Agreement. 
  
 “Discontinuation Closing Date” means the date of
Symphony’s receipt of the Discontinuation Price. 
  
 “Discontinuation Option” has the meaning set forth in Section 11.2(a) of the Amended and Restated Research and Development Agreement. 
  
 “Discontinuation Price” has the meaning set forth in Section 11.2(a) of the Amended and Restated
Research and Development Agreement. 
  
 “Discontinued
Program” has the meaning set forth in Section 2.10 of the Novated and Restated Technology License Agreement. 
  
 “Disinterested Directors” has the meaning set forth in Article IX of the Symphony Evolution Charter. 
  
 “Distribution” has the meaning set forth in Section
1.01 of the Holdings LLC Agreement. 
  
 “Effective
Date” has the meaning set forth in the Novated and Restated Technology License Agreement. 
  
 “Effective Registration Date” has the meaning set forth in the Registration Rights Agreement 
  
 “Encumbrance” means (i) any security interest,
pledge, mortgage, lien (statutory or other), charge or option to purchase, lease or otherwise acquire any interest, (ii) any adverse claim, restriction, covenant, title defect, hypothecation, assignment, deposit arrangement or other encumbrance of
any kind, preference or priority, or (iii) any other security agreement or preferential arrangement of any kind or nature whatsoever (including, without limitation, any conditional sale or other title retention agreement). 
  
 “Enhancements” means findings, improvements,
discoveries, inventions, additions, modifications, enhancements, derivative works, clinical development data, or changes to the Licensed Intellectual Property and Regulatory Files. 

  

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AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 “Equity Securities” means, with respect to any Person, shares of capital stock of
(or other ownership or profit interests in) such Person, warrants, options or other rights for the purchase or other acquisition from such Person of shares of capital stock of (or other ownership or profit interests in) such Person, securities
convertible into or exchangeable for shares of capital stock of (or other ownership or profit interests in) such Person or warrants, rights or options for the purchase or other acquisition from such Person of such shares (or such other interests),
and other ownership or profit interests in such Person (including, without limitation, partnership, member or trust interests therein), whether voting or nonvoting, and whether or not such shares, warrants, options, rights or other interests are
authorized or otherwise existing on any date of determination. 
  
 “ERISA” means the United States Employee Retirement Income Security Act of 1974, as amended. 
  
 “Exchange Act” means the Securities Exchange Act of 1934, as amended, and the rules and regulations promulgated thereunder.

  
 “Exelixis” means Exelixis, Inc., a
Delaware corporation. 
  
 “Exelixis Common
Stock” means the common stock, par value $0.001 per share, of Exelixis. 
  
 “Exelixis Common Stock Valuation” has the meaning set forth in Section 2(e) of the Purchase Option Agreement. 
  
 “Exelixis-GlaxoSmithKline Collaboration Committee” means the committee established by Exelixis and
GlaxoSmithKline pursuant to Section 2.2 of the GSK Agreement. 
  
 “Exelixis Member” has the meaning set forth in Section 2(c) of the Management Services Agreement. 
  
 “Exelixis Obligations” has the meaning set forth in Section 6.1 of the Amended and Restated Research and Development Agreement.

  
 “Exelixis Personnel” has the meaning
set forth in Section 8.4 of the Amended and Restated Research and Development Agreement. 
  
 “Existing NDA” has the meaning set forth in Section 2 of the Confidentiality Agreement. 
  
 “Expert” has the meaning set forth in Section 11.2(c) of the Amended and Restated Research and Development Agreement. 

 
 “Extension Funding” has the meaning set forth in
Section 2 of the Research Cost Sharing and Extension Agreement. 
  
 “External Directors” has the meaning set forth in the preamble of the Confidentiality Agreement. 

  

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AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 “FDA” means the United States Food and Drug Administration or its successor
agency in the United States. 
  
 “FDA
Sponsor” has the meaning set forth in Section 5.1 of the Amended and Restated Research and Development Agreement. 
  
 “Final Purchase Price” has the meaning set forth in Section 2(j)(ii) of the Purchase Option Agreement. 
  
 “Financial Audits” has the meaning set forth in
Section 6.7 of the Amended and Restated Research and Development Agreement. 
  
 “Financing” has the meaning set forth in the Preliminary Statement of the Purchase Option Agreement. 
  
 “Fiscal Year” has for each Operative Document in which it appears the meaning set forth in such Operative Document. 
  
 “Form S-3” means the Registration Form S-3 as defined
under the Securities Act. 
  
 “FTE” has
the meaning set forth in Section 4.1 of the Amended and Restated Research and Development Agreement. 
  
 “Funded Capital” has the meaning set forth in Section 2.02(b) of the Warrant Purchase Agreement. 
  
 “Funding Agreement” means the Funding Agreement,
dated June 9, 2005, among Exelixis, SCP and Investors. 
  
 “Funding Notice” has the meaning set forth in Section 2(a) of the Funding Agreement. 
  
 “Funds Price” has the meaning set forth in Section 2(b) of the Purchase Option Agreement. 
  
 “GAAP” means generally accepted accounting principles
in effect in the United States of America from time to time. 
  
 “GlaxoSmithKline” means SmithKline Beecham Corporation, a Pennsylvania corporation, doing business as GlaxoSmithKline. 
  
 “Governmental Approvals” means authorizations, consents, orders, declarations or approvals of, or filings with, or terminations or
expirations of waiting periods imposed by any Governmental Authority. 
  
 “Governmental Authority” means any United States or non-United States federal, national, supranational, state, provincial, local, or similar government, governmental, regulatory or administrative authority, agency or
commission or any court, tribunal, or judicial or arbitral body. 

  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED
AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 “Governmental Order” means any order, writ, judgment, injunction, decree,
stipulation, determination or award entered by or with any Governmental Authority. 
  
 “GSK Agreement” has the meaning set forth in Section 4.10 of the Novated and Restated Technology License Agreement. 
  
 “Hedge Agreement” means any interest rate swap, cap or collar agreement, interest rate future or
option contract, currency swap agreement, currency future or option contract or other similar hedging agreement. 
  
 “HHMI” has the meaning set forth in Annex C of the Novated and Restated Technology License Agreement. 
  
 “Holdings” means Symphony Evolution Holdings LLC, a
Delaware limited liability company. 
  
 “Holdings
Claims” has the meaning set forth in Section 5.01 of the Warrant Purchase Agreement. 
  
 “Holdings LLC Agreement” means the Second Amended and Restated Limited Liability Company Agreement of Holdings dated June 9, 2005.

  
 “HSR Act Filings” means the premerger
notification and report forms required under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended. 
  
 “IND” means an Investigational New Drug Application, as described in 21 U.S.C. § 355(i)(1) and 21 C.F.R. § 312 in the
regulations promulgated by the United States Food and Drug Administration, or any foreign equivalent thereof. 
  
 “Indemnification Agreement” means the Indemnification Agreement among Symphony Evolution and the Directors named therein, dated
June 9, 2005. 
  
 “Independent Accountant”
has the meaning set forth in Section 2(i)(ii) of the Purchase Option Agreement. 
  
 “Initial Funds” has the meaning set forth in Section 2(a) of the Funding Agreement. 
  
 “Initial Holdings LLC Agreement” means the Agreement of Limited Liability Company of Holdings, dated March 30, 2005. 

 
 “Initial Investors LLC Agreement” means the
Agreement of Limited Liability Company of Investors, dated May 20, 2005. 

  

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AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 “Initial LLC Member” has the meaning set forth in Section 1.01 of the Holdings
LLC Agreement. 
  
 “Interest Certificate”
has the meaning set forth in Section 1.01 of the Holdings LLC Agreement. 
  
 “Interim Holdings LLC Agreement” means the Amended and Restated Agreement of Limited Liability Company of Holdings, dated June 2, 2005. 
  
 “Investment Company Act” means the Investment Company
Act of 1940, as amended. 
  
 “Investment
Overview” means the investment overview describing the transactions entered into pursuant to the Operative Documents. 
  
 “Investment Policy” has the meaning set forth in Section 1(a)(viii) of the Management Services Agreement. 
  
 “Investors” means Symphony Evolution Investors LLC.

  
 “Investors LLC Agreement” means
Amended and Restated Agreement of Limited Liability Company of Investors dated June 9, 2005. 
  
 “IRS” means the U.S. Internal Revenue Service. 
  
 “Knowledge” means the actual (and not imputed) knowledge of the executive officers of Exelixis, without the duty of inquiry or
investigation. 
  
 “Law” means any law,
statute, treaty, constitution, regulation, rule, ordinance, order or Governmental Approval, or other governmental restriction, requirement or determination, of or by any Governmental Authority. 
  
 “Ledger Fee” has the meaning set forth in Section
6(b) of the Management Services Agreement. 
  
 “License” has the meaning set forth in the Preliminary Statement of the Purchase Option Agreement. 
  
 “Licensed Intellectual Property” means the Licensed Patent Rights, Symphony Evolution Enhancements, Licensor Enhancements and the
Licensed Know-How. 
  
 “Licensed Know-How”
means any and all proprietary technology (other than the University IP) that is [ * ] 
  
 “Licensed Patent Rights” means:[ * ] 
  
 “Licensor” means Exelixis. 
  
 “Licensor Enhancements” means [ * ] 

  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED
AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 “Lien” has the meaning set forth in Section 1.01 of the Holdings LLC Agreement.

  
 “Liquidating Event” has the meaning
set forth in Section 8.01 of the Holdings LLC Agreement. 
  
 “LLC Agreements” means the Initial Holdings LLC Agreement, the Interim Holdings LLC Agreement, the Holdings LLC Agreement, the Initial Investors LLC Agreement and the Investors LLC Agreement. 
  
 “Loss” has for each Operative Document in which it
appears the meaning set forth in such Operative Document. 
  
 “Management Budget” has the meaning set forth in Section 4.1 of the Amended and Restated Research and Development Agreement. 
  
 “Management Fee” has the meaning set forth in Section 6(a) of the Management Services Agreement. 
  
 “Management Plan” has the meaning set forth in
Section 4.1 of the Amended and Restated Research and Development Agreement. 
  
 “Management Services” has the meaning set forth in Section 1(a) of the Management Services Agreement. 
  
 “Management Services Agreement” means the Management Services Agreement between Symphony Evolution and RRD, dated as of June 9,
2005. 
  
 “Manager” means (i) for each LLC
Agreement in which it appears, the meaning set forth in such LLC Agreement, and (ii) for each other Operative Document in which it appears, RRD. 
  
 “Manager Event” has the meaning set forth in Section 3.01(f) of the Holdings LLC Agreement. 
  
 “Material Adverse Effect” means, with respect to any
Person, a material adverse effect on (i) the business, assets, property or condition (financial or otherwise) of such Person or, (ii) its ability to comply with and satisfy its respective agreements and obligations under the Operative Documents or,
(iii) the enforceability of the obligations of such Person of any of the Operative Documents to which it is a party. 
  
 “Material Change” has the meaning set forth in Paragraph 12 of Annex B of the Amended and Restated Research and Development
Agreement. 
  
 “Material Contract” has the
meaning set forth in Section 3(j) of the Management Services Agreement. 
  
 “Material Subsidiary” means, at any time, a Subsidiary of Exelixis having assets in an amount equal to at least 5% of the amount of total consolidated assets of Exelixis and its 

  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED
AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 Subsidiaries (determined as of the last day of the most recent fiscal quarter of Exelixis) or revenues or net income in
an amount equal to at least 5% of the amount of total consolidated revenues or net income of Exelixis and its Subsidiaries for the 12-month period ending on the last day of the most recent fiscal quarter of Exelixis. 
  
 “Maximum Committed Capital” has the meaning set forth
in Section 2.02(b) of the Warrant Purchase Agreement. 
  
 “Medical Discontinuation Event” means (a) as specified in each Protocol, those data that, if collected in such Protocol, demonstrate that such Protocol should not be continued or (b) a series of adverse events, side
effects or other undesirable outcomes that, when collected in a Protocol, would cause a reasonable FDA Sponsor to discontinue such Protocol. 
  
 “Membership Interest” means (i) for each LLC Agreement in which it appears, the meaning set forth in such LLC Agreement, and (ii)
for each other Operative Document in which it appears, the meaning set forth in the Holdings LLC Agreement. 
  
 “NASDAQ” means the National Association of Securities Dealers Automatic Quotation System. 
  
 “NDA” means a New Drug Application, as defined in the
regulations promulgated by the United States Food and Drug Administration, or any foreign equivalent thereof. 
  
 “Net Debt” has the meaning set forth in Section 2(b) of the Purchase Option Agreement. 
  
 “Non-Exelixis Capital Transaction” means any (i) sale
or other disposition of all or part of the Symphony Evolution Shares or all or substantially all of the operating assets of Symphony Evolution, to a Person other than Exelixis or an Affiliate of Exelixis or (ii) distribution in kind of the Symphony
Evolution Shares following the expiration of the Purchase Option. 
  
 “Novated and Restated Technology License Agreement” means the Novated and Restated Technology License Agreement, dated as of June 9, 2005, among Exelixis, Symphony Evolution and Holdings. 
  
 “Operative Documents” means, collectively, the
Indemnification Agreement, the Holdings LLC Agreement, the Purchase Option Agreement, the Warrant Purchase Agreement, the Registration Rights Agreement, the Subscription Agreement, the Technology License Agreement, the Novated and Restated
Technology License Agreement, the Management Services Agreement, the Research and Development Agreement, the Amended and Restated Research and Development Agreement, the Research Cost Sharing and Extension Agreement, the Confidentiality Agreement,
the Funding Agreement and each other certificate and agreement executed in connection with any of the foregoing documents. 
  
 “Organizational Documents” means any certificates or articles of incorporation or formation, partnership agreements, trust
instruments, bylaws or other governing documents. 

  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED
AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 “Parties” means, for each Operative Document or other agreement in which it
appears, the parties to such Operative Document or other agreement, as set forth therein (each a “Party”). With respect to any agreement in which a provision is included therein by reference to a provision in another
agreement, the term “Party” shall be read to refer to the parties to the document at hand, not the agreement that is referenced. 
  
 “Payment Terms” has the meaning set forth in Section 8.2 of the Amended and Restated Research and Development Agreement.

  
 “Percentage” has the meaning set forth
in Section 1.01 of the Holdings LLC Agreement. 
  
 “Permitted Investments” has the meaning set forth in Section 1.01 of the Holdings LLC Agreement. 
  
 “Permitted Investments Letter” means the Permitted Investments Letter dated as of June 9, 2005, from Symphony Evolution to RRD, as
set forth in Exhibit B to the Management Services Agreement. 
  
 “Permitted Lien” has the meaning set forth in Section 1.01 of the Holdings LLC Agreement. 
  
 “Person” means any individual, partnership (whether general or limited), limited liability company, corporation, trust, estate,
association, nominee or other entity. 
  
 “Personnel” of a Party means such Party, its employees, subcontractors, consultants, representatives and agents. 
  
 “Prime Rate” means the quoted “Prime Rate” at JPMorgan Chase Bank or, if such bank ceases to exist or is not quoting a
base rate, prime rate reference rate or similar rate for United States dollar loans, such other major money center commercial bank in New York City selected by the Manager. 
  
 “Product” means any product that contains or comprises XL647, XL784 or XL999 or any Structurally
Related Compound thereof. 
  
 “Profit” has
the meaning set forth in Section 1.01 of the Holdings LLC Agreement. 
  
 “Program Option” has the meaning set forth in Section 11.1(a) of the Amended and Restated Research and Development Agreement. 
  
 “Program Option Closing Date” has the meaning set forth in Section 11.1(d) of the
Amended and Restated Research and Development Agreement. 
  
 “Program Option Exercise Date” has the meaning set forth in Section 11.1(b) of the Amended and Restated Research and Development Agreement. 

  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED
AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 “Program Option Exercise Notice” has the meaning set forth in
Section 11.1(b) of the Amended and Restated Research and Development Agreement. 
  
 “Program Option Exercise Price” has the meaning set forth in Section 11.1(c) of the Amended and Restated Research and Development Agreement. 
  
 “Program Option Period” has the meaning
set forth in Section 11.1(a) of the Amended and Restated Research and Development Agreement. 
  
 “Programs” means those certain clinical programs pursuing indications for XL647, XL784, and XL999 in accordance with the Development Plan (each a “Program”). 

 
 “Protocol” means a written protocol that meets the
substantive requirements of Section 6 of the ICH Guideline for Good Clinical Practice as adopted by the FDA, effective May 9, 1997 and is included within the Clinical Plan or later modified or added to the Clinical Plan pursuant to Section 4.2 of
the Amended and Restated Research and Development Agreement. 
  
 “Public Companies” has the meaning set forth in Section 5(e) of the Purchase Option Agreement. 
  
 “Purchase Option” has the meaning set forth in Section 1(a) of the Purchase Option Agreement. 
  
 “Purchase Option Agreement” means this Purchase
Option Agreement dated as of June 9, 2005, among Exelixis, Holdings and Symphony Evolution. 
  
 “Purchase Option Closing Date” has the meaning set forth in Section 2(a) of the Purchase Option Agreement. 
  
 “Purchase Option Dispute Notice” has the meaning set forth in Section 2(b) of the Purchase Option
Agreement. 
  
 “Purchase Option Exercise
Date” has the meaning set forth in Section 2(a) of the Purchase Option Agreement. 
  
 “Purchase Option Exercise Notice” has the meaning set forth in Section 2(a) of the Purchase Option Agreement. 
  
 “Purchase Option Period” has the meaning set forth in Section 1(c)(iii) of the Purchase Option
Agreement. 
  
 “Purchase Price” has the
meaning set forth in Section 2(b) of the Purchase Option Agreement. 
  
 “QA Audits” has the meaning set forth in Section 6.6 of the Amended and Restated Research and Development Agreement. 

  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED
AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 “Quarterly Meeting” has the meaning set forth in Paragraph 6 of Annex B of the
Amended and Restated Research and Development Agreement. 
  
 “Regents” has the meaning set forth in Section 3.1 of the Novated and Restated Technology License Agreement. 
  
 “Regents Agreement” has the meaning set forth in Section 3.1 of the Novated and Restated Technology License Agreement. 

 
 “Regents Claims” has the meaning set forth in
Annex C of the Novated and Restated Technology License Agreement. 
  
 “Regents Indemnitees” has the meaning set forth in Annex C of the Novated and Restated Technology License Agreement. 
  
 “Regents Technology” has the meaning set forth in Annex C of the Novated and Restated Technology
License Agreement. 
  
 “Registration Rights
Agreement” means the Registration Rights Agreement dated as of the Closing Date, between Exelixis and Holdings. 
  
 “Registration Statement” has the meaning set forth in Section 1(b) of the Registration Rights Agreement. 
  
 “Regulatory Authority” means the United States Food
and Drug Administration, or any successor agency in the United States, or any health regulatory authority(ies) in any other country that is a counterpart to the FDA and has responsibility for granting registrations or other regulatory approval for
the marketing, manufacture, storage, sale or use of drugs in such other country. 
  
 “Regulatory Allocation” has the meaning set forth in Section 3.06 of the Holdings LLC Agreement. 
  
 “Regulatory Files” means any IND, NDA or any other filings filed with any Regulatory Authority with respect to XL647, XL784, XL999
or the Programs. 
  
 “Removed Director”
has the meaning set forth in Section 3.01(h)(i) of the Holdings LLC Agreement. 
  
 “Representative” of any Person means such Person’s shareholders, principals, directors, officers, employees, members, managers and/or partners. 
  
 “Research and Development Agreement” means the
Research and Development Agreement dated as of June 9, 2005, between Exelixis and Holdings. 
  
 “Research Cost Sharing and Extension Agreement” means the Research Cost Sharing and Extension Agreement dated as of June 9, 2005, between Exelixis, Holdings, and Symphony Evolution. 

  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED
AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 “RRD” means RRD International, LLC, a Delaware limited liability company.

  
 “RRD Indemnified Party” has the
meaning set forth in Section 10(a)(i) of the Management Services Agreement. 
  
 “RRD Loss” has the meaning set forth in Section 10(a)(i) of the Management Services Agreement. 
  
 “Schedule K-1” has the meaning set forth in Section 9.02(a) of the Holdings LLC Agreement. 
  
 “Scientific Discontinuation Event” has the meaning
set forth in Section 4.2(f) of the Amended and Restated Research and Development Agreement. 
  
 “SCP” means Symphony Capital Partners, L.P., a Delaware limited partnership. 
  
 “SEC” means the United States Securities and Exchange Commission. 
  
 “Securities Act” means the Securities Act of 1933, as amended. 
  
 “Shareholder” means any Person who owns any
Symphony Evolution Shares. 
  
 “Solvent”
has the meaning set forth in Section 1.01 of the Holdings LLC Agreement. 
  
 “SSP” means Symphony Strategic Partners, LLC, a Delaware limited liability company. 
  
 “Stock Payment Date” has the meaning set forth in Section 2 of the Subscription Agreement. 
  
 “Stock Purchase Price” has the meaning set forth in
Section 2 of the Subscription Agreement. 
  
 “Structurally Related Compound” means: 
  
 (a) with respect to XL647, any compound that is [ * ] 
  
 (b) with respect to XL784, any compound that is [ * ] 
  
 (c) with respect to XL999, any compound that is [ * ] 
  
 “Subcontracting Agreement” has the meaning set forth in Section 6.3 of the Amended and Restated Research and Development Agreement. 
  
 “Subcontractor” has the meaning set forth in Section 6.3 of the Amended and Restated Research and
Development Agreement. 

  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED
AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 “Subscription Agreement” means the Subscription Agreement between Symphony
Evolution and Holdings, dated as of June 9, 2005. 
  
 “Subsidiary” of any Person means any corporation, partnership, joint venture, limited liability company, trust or estate of which (or in which) more than 50% of (a) the issued and outstanding capital stock having
ordinary voting power to elect a majority of the board of directors of such corporation (irrespective of whether at the time capital stock of any other class or classes of such corporation shall or might have voting power upon the occurrence of any
contingency); (b) the interest in the capital or profits of such partnership, joint venture or limited liability company; or (c) the beneficial interest in such trust or estate is at the time directly or indirectly owned or controlled by such
Person, by such Person and one or more of its other Subsidiaries or by one or more of such Person’s other Subsidiaries. 
  
 “Surviving Entity” means the surviving legal entity which is surviving entity to Exelixis after giving effect to a Change
of Control. 
  
 “Symphony Capital” means
Symphony Capital LLC, a Delaware limited liability company. 
  
 “Symphony Evolution” means Symphony Evolution, Inc., a Delaware corporation. 
  
 “Symphony Evolution Board” means the Symphony Evolution board of directors. 
  
 “Symphony Evolution By-laws” means the By-laws of
Symphony Evolution, as adopted by resolution of the Symphony Evolution Board on June 9, 2005. 
  
 “Symphony Evolution Charter” means the Amended and Restated Certificate of Incorporation of Symphony Evolution, dated as of June 9, 2005. 
  
 “Symphony Evolution Director Event” has the meaning
set forth in Section 3.01(h)(i) of the Holdings LLC Agreement. 
  
 “Symphony Evolution Enhancements” means [ * ] 
  
 “Symphony Evolution Equity Securities” means the Common Stock and any other stock or shares issued by Symphony Evolution. 
  
 “Symphony Evolution Loss” has the meaning set forth in Section 10(b) of the Management Services
Agreement. 
  
 “Symphony Evolution Securities
Encumbrance” has the meaning set forth in Section 4(b)(ii) of the Purchase Option Agreement. 
  
 “Symphony Evolution Shares” has the meaning set forth in Section 2.02 of the Holdings LLC Agreement. 

  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED
AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 “Symphony Funds” means Symphony Capital Partners, L.P., a Delaware limited
partnership, and Symphony Strategic Partners, LLC, a Delaware limited liability company (each a “Symphony Fund”). 
  
 “Symphony Member” has the meaning set forth in Section 4.2(d) of the Amended and Restated Research and Development Agreement.

  
 “Tangible Materials” means [ * ].

  
 “Tax Amount” has the meaning set forth
in Section 4.02 of the Holdings LLC Agreement. 
  
 “Technology License Agreement” means the Technology License Agreement, dated as of June 9, 2005, between Exelixis and Holdings. 
  

“Term” means the period starting on the Closing Date and ending upon the termination or expiration of the Purchase Option
Period. 
  
 “Territory” means the world.

  
 “Third Party IP” has the meaning set
forth in Section 2.9 of the Novated and Restated Technology License Agreement. 
  
 “Third Party Licensor” means (a) a third party from which Exelixis has received a license or sublicense to Licensed Intellectual Property or (b) a third party to which Exelixis has granted a
license or sublicense to the Licensed Intellectual Property. As of the Closing Date, GlaxoSmithKline is the only Third Party Licensor. 
  
 “Transfer” has for each Operative Document in which it appears the meaning set forth in such Operative Document. 
  
 “Transferee” has, for each Operative Document in
which it appears, the meaning set forth in such Operative Document. 
  
 “University Agreements” has the meaning set forth in Section 3.1 of the Novated and Restated Technology License Agreement. 
  
 “University IP” has the meaning set forth in Section 3.1 of the Novated and Restated Technology License Agreement.

  
 “Voluntary Bankruptcy” has the meaning
set forth in Section 1.01 of the Holdings LLC Agreement. 
  
 “Warrant Closing” has the meaning set forth in Section 2.07 of the Warrant Purchase Agreement. 
  
 “Warrant Date” has the meaning set forth in Section 2.06 of the Warrant Purchase Agreement. 

  

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AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 “Warrant Purchase Agreement” means the Warrant Purchase Agreement dated as of the
Closing Date, between Exelixis and Holdings. 
  
 “Warrants” has the meaning set forth in Section 2.03 of the Warrant Purchase Agreement. 
  
 “Warrant Share Legend” has the meaning set forth in Section 6.02 of the Warrant Purchase Agreement. 
  
 “Warrant Shares” has the meaning set forth in Section
2.03 of the Warrant Purchase Agreement. 
  
 “XL647” means: [ * ] 
  
 “XL784” means: [ * ] 
  
 “XL999” means: [ * ] 
  
 “Yale” has the meaning set forth in Section 3.1 of the Novated and Restated Technology License Agreement. 
  
 “Yale Agreement” has the meaning set forth in Section 3.1 of the Novated and Restated Technology License Agreement. 
  
 “Yale Claims” has the meaning set forth in Annex C of
the Novated and Restated Technology License Agreement. 
  
 “Yale Indemnitees” has the meaning set forth in Annex C of the Novated and Restated Technology License Agreement. 
  
 “Yale Technology” has the meaning set forth in Annex C of the Novated and Restated Technology License Agreement. 

  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED
AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 ANNEX B 
  
 SYMPHONY EVOLUTION, INC. 
  
 DEVELOPMENT COMMITTEE CHARTER 
  
 Purpose 
  
 The Development Committee (the “Development Committee”) is established by Symphony Evolution, Inc. (“Symphony
Evolution”) and Exelixis, Inc. (“Exelixis”, and together with Symphony Evolution, the “Parties” and each a “Party”) to oversee a clinical development plan (the
“Development Plan”) and a development budget (the “Development Budget”) of the Programs (each as defined in that certain Novated and Restated Technology License Agreement, dated as of June 9, 2005,
among Symphony Evolution, Exelixis and Symphony Evolution Holdings LLC (“Holdings”)) pursuing indications for XL647, XL784 and XL999. Capitalized terms used herein and not defined herein shall have the meanings assigned to
such terms in the Amended and Restated Research and Development Agreement, dated as of June 9, 2005, among Symphony Evolution, Holdings and Exelixis. 
  
 Composition 
  

	 	1.	The Development Committee shall have an even number of members and consist of an equal number of members from each Party (the “Development Committee
Members”). Each Party may bring additional employees or representatives to each meeting as non-voting representatives, but only if such employees or representatives are bound by confidentiality obligations at least as stringent as those
described in the Confidentiality Agreement. The size and composition of the Development Committee provided herein may not be changed without the consent of both the Symphony Evolution Board and Exelixis. 

  

	 	2.	One-half (1/2) of the Development Committee Members shall be designated by Exelixis and one-half (1/2) shall be designated by Symphony Evolution. 

  

	 	3.	Each Development Committee Member shall have the requisite background, experience and training to carry out the duties and obligations of the Development Committee. Development
Committee Members need not be directors of Symphony Evolution. 

  

	 	4.	The chair of the Development Committee shall be, initially, Jeffrey R. Latts, the Chief Medical Officer of Exelixis, and any succeeding chair shall be such person as may be
appointed to the position of Chief Medical Officer of Exelixis (or an equivalent successor position) (the “Chair”). If Exelixis wishes to appoint a Chair other than the then-current Chief Medical Officer of Exelixis (or the
holder of an equivalent successor position), then such appointment shall require the consent of the Symphony Evolution Board, in the form of an affirmative vote of at least three-fifths of the members of the Symphony Evolution Board.

  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED
AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

	 	5.	The Development Committee Members may be removed or replaced, and any vacancies on the Development Committee shall be filled, by the Symphony Evolution Board, solely with respect to
any such Development Committee Members selected by Symphony Evolution, and by Exelixis, solely with respect to any such Development Committee Members selected by Exelixis. 

  
 Operations 
  

	 	6.	The Development Committee shall meet once per calendar quarter during the Term (each, a “Quarterly Meeting”). Quarterly Meetings may be held in person or by
teleconference when appropriate, but at least one-half (1/2) of such meetings in each year must be in person. The location of the in-person Quarterly Meetings shall alternate between South San Francisco, CA and either Rockville, MD or New York City,
NY (as may be decided among the Members selected by Symphony Evolution). Each of Symphony Evolution and Exelixis shall be solely responsible for the costs associated with its employees and/or representatives attending and participating in such
Quarterly Meetings. In addition, any two (2) members of the Development Committee may jointly call for an ad hoc meeting of the Development Committee by teleconference at any time, by giving the other members of the Development Committee advance
written notice of at least five (5) Business Days (each, an “Ad Hoc Meeting”). The purpose of the Ad Hoc Meetings shall be to update the Development Committee on the progress of the development of the Programs and to address
any other time-sensitive matters including, without limitation, additional expenditure requests brought to the Development Committee’s attention pursuant to Section 8.3(b) or 8.3(c) of the Amended and Restated Research and Development
Agreement, and additional expenditure requests brought to the Development Committee’s attention pursuant to the Management Services Agreement. 

  

	 	7.	The Chair shall, in consultation with other Development Committee Members and the management of Symphony Evolution, develop and set the Development Committee’s agenda for each
Quarterly Meeting. The Chair shall include on such agenda each item requested by a Development Committee member at least two (2) weeks before the applicable Quarterly Meeting. The agenda and information concerning the business to be conducted at
each Quarterly Meeting shall be communicated in writing to the Development Committee Members at least one (1) week in advance of such Quarterly Meeting to permit meaningful review. Such agenda shall not be required for an Ad Hoc Meeting.

  

	 	8.	 Each Party’s Development Committee Members shall collectively have three (3) votes, regardless of the number of its Development Committee Members participating
in such meeting. No votes shall be taken unless there is at least one (1) Development Committee Member participating representing each of Exelixis and Symphony Evolution. Each Party may allocate its three (3) votes among its participating
Development Committee Members in any manner, at such Party’s discretion. If only one (1) Development Committee Member is participating for a given Party, such member may cast all three (3) votes. Unless otherwise specified 

  

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AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

	 	 
herein, all actions taken by the Development Committee as a committee shall be by majority vote. If the Development Committee Members reach deadlock on any
vote, then such deadlock shall be resolved in accordance with Paragraph 11 of this Development Committee Charter. 

  

	 	9.	Notwithstanding anything herein to the contrary, during the Term, this Development Committee Charter may be amended only with the unanimous consent of the Development Committee and
the approval of the Symphony Evolution Board and Exelixis. 

  

	 	10.	The Chair shall prepare, and distribute to all Development Committee Members, draft committee minutes within ten (10) days after each Quarterly Meeting of the Development Committee,
and after each Ad Hoc Meeting only if the Development Committee has taken any action, made any decision or adopted any resolution during such Ad Hoc Meeting. The Chair shall revise such minutes to reflect all reasonable comments received from
Development Committee Members within ten (10) days after such distribution and shall re-circulate such revised minutes until the Development Committee approves them at a future meeting of the Development Committee. 

  

	 	11.	If the Development Committee is unable to decide by a majority vote on any issue within the scope of its authority and duties, then the Development Committee shall promptly raise
such issue to the chief executive officers (or equivalent officer) of Exelixis and Symphony Evolution. The chief executive officers shall have ten (10) days to mutually agree on how to resolve such issue. If the parties’ chief executive
officers are unable to resolve such issue within the ten (10) day period, then such issue shall be brought to the Symphony Evolution Board, and the Symphony Evolution Board shall promptly resolve such issue, which resolution shall be binding on
Symphony Evolution and Exelixis. 

  
 Authority and Duties

  

	 	12.	The Development Committee shall decide on all changes in the Management Plan and the Management Budget that are subject to approval pursuant to Section 2 of the Management Services
Agreement, and all changes in the Clinical Plan and Clinical Budget that are subject to approval pursuant to Sections 4.2 and 8.3 of the Amended and Restated Research and Development Agreement (each such change, a “Material
Change” to the Development Plan or Development Budget, as applicable). In addition, the Development Committee shall decide on any other matters that are identified in the Amended and Restated Research and Development Agreement or the
Management Services Agreement as requiring the approval of the Development Committee. Unless otherwise approved pursuant to Paragraph 11 above, or discontinued or modified pursuant to Sections 4.2(f) or 5.1 of the Amended and Restated
Research and Development Agreement, no Material Change to the Development Plan or Development Budget will be adopted by Symphony Evolution unless and until the Development Committee approves such Material Change. 

  

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AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

	 	13.	The Development Committee shall report at least quarterly to the Symphony Evolution Board regarding progress relative to the Development Plan and/or Development Budget, and any
changes in the Development Plan and/or Development Budget, and shall respond promptly to any reasonable requests for additional information made by the Symphony Evolution Board. The Development Committee shall also submit its decisions regarding the
Development Plan and Development Budget to the Symphony Evolution Board, including regulatory strategies and discontinuation or modification of the Programs, if warranted. 

  

	 	14.	The Development Committee shall continuously evaluate the funding requirements of the Programs, and shall recommend to the Symphony Evolution Board an appropriate date to request
that Holdings submit to Investors a Funding Notice with respect to a request for the Additional Funds, and that Holdings make an additional capital contribution to Symphony Evolution from the funds Holdings receives from Investors pursuant thereto.

  
 The foregoing list of duties is not exhaustive,
and the Development Committee may, in addition, perform such other functions as may be necessary or appropriate for the performance of its duties and the furtherance of the development of Programs, including as may be required under any Operative
Document. In no event shall the Development Committee have the power to amend any of the Operative Documents. The Development Committee shall have the power to delegate its authority and duties to sub-committees as it deems appropriate;
provided, however, that any such sub-committee shall have at least one (1) Development Committee Member who is appointed to the Development Committee by the Symphony Evolution Board and at least one Development Committee Member who is
appointed by Exelixis. 

  

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AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 ANNEX C 
  
 DEVELOPMENT PLAN 
  
 [ * ] 

  

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AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 ANNEX D 
  
 DEVELOPMENT BUDGET 
  
 [ * ] 

  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED
AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 ANNEX E 
  
 PAYMENT TERMS 
  

	 	1.	Exelixis will invoice Symphony Evolution monthly, in arrears, for out-of-pocket fees, expenses and costs actually incurred by Exelixis (including without limitation all costs
associated with Subcontracting Agreements entered into by Exelixis pursuant to Section 6.2) or Exelixis resources used, in each case with respect to the performance of Clinical Plan-related activities. 

  

	 	2.	Exelixis’ monthly invoices must include receipts, third party invoices or other reasonable documentation for all out-of-pocket fees, expenses and costs. Exelixis’ invoices
not in accordance with the requirements of this section may incur delays in payment. No administrative fee shall be charged to Symphony Evolution in connection with any out-of-pocket fees, expenses or costs. Unless the Development Committee provides
Exelixis with prior approval, Exelixis employees shall use coach (economy) class travel for all daytime air travel within North America and business class travel for all overnight air travel within North America or air travel outside North America.

  

	 	3.	Exelixis’ invoices will include a report summarizing the amount of time devoted by Exelixis employees during the invoice period. Symphony Evolution will reimburse Exelixis
based on an annual fully burdened FTE rate of [ * ]. 

  

	 	4.	Invoices must be submitted by Exelixis to Symphony Evolution by the [ * ] of each month. Invoices not received by Symphony Evolution on the required date may result in delays
in payment to Exelixis. 

  

	 	5.	Prior to any payments being made to Exelixis, Exelixis agrees to complete a W-9 form and supply Exelixis’ social security or TIN number to Symphony Evolution, as appropriate,
or supply a written declaration of foreign resident status and ineligibility for U.S. withholding taxes. Exelixis is responsible for maintaining adequate records for tax purposes. If Exelixis requests summaries or break-downs of compensation in
addition to the 1099 form or analogous form that Symphony Evolution provides, Symphony Evolution will charge Exelixis a fee for preparing the requested documents, based on the amount of time expended by Symphony Evolution. 

 

	 	6.	Symphony Evolution shall pay each invoice within [ * ] of receipt. All fees will be payable in US Dollars. If Symphony Evolution disputes in good faith any portion of an
invoice, then Symphony Evolution shall pay the undisputed amounts as set forth in the preceding sentence and the Parties shall use good faith efforts to reconcile the disputed amount as soon as practicable. 

  

	 	7.	            Exelixis will mail invoices to Symphony Evolution at the following address: 

             Symphony Evolution, Inc. 
             7361 Calhoun Place, Suite 325 
             Rockville, MD 20855 
             Attn: Accounts Payable 
  

	 	8.	All payments to Exelixis shall be sent to Exelixis by wire transfer to the following account: [ * ] 

  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED
AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 Schedule 6.3 
  
 [ * ] 

  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED
AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 Schedule 12.1(f) 
  
 [ * ] 

  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED
AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.Purchase Option Agreement

 Exhibit 10.6 
  
 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN
THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY
WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2 OF
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 
  
 EXECUTION COPY 
  
  
  
  

  
 PURCHASE OPTION AGREEMENT 

 
 by and among 
  
 EXELIXIS, INC., 
  
 SYMPHONY EVOLUTION HOLDINGS LLC 
  
 and 
  
 SYMPHONY EVOLUTION, INC. 
  

  
 Dated as of June 9, 2005 
  

  

 
  
  
  
  

  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 TABLE OF CONTENTS 
  

			
	 	  	Page

		
	 Section 1. Grant of Purchase Option
	  	2
		
	 Section 2. Exercise of Purchase Option
	  	3
		
	 Section 3. Exelixis Representations, Warranties and Covenants
	  	10
		
	 Section 4. Holdings Representations, Warranties and Covenants
	  	12
		
	 Section 5. Symphony Evolution Representations, Warranties and Covenants
	  	16
		
	 Section 6. Notice of Material Event
	  	23
		
	 Section 7. Assignment, Transfers and Legend
	  	23
		
	 Section 8. Costs and Expenses; Payments
	  	24
		
	 Section 9. Termination of Agreement.
	  	24
		
	 Section 10. Survival; Indemnification
	  	24
		
	 Section 11. No Petition
	  	27
		
	 Section 12. Third-Party Beneficiary
	  	27
		
	 Section 13. Notices
	  	27
		
	 Section 14. Governing Law; Consent to Jurisdiction and Service of Process
	  	28
		
	 Section 15. Waiver of Jury Trial
	  	29
		
	 Section 16. Entire Agreement
	  	29
		
	 Section 17. Amendment; Successors; Counterparts
	  	29
		
	 Section 18. Specific Performance
	  	29
		
	 Section 19. Severability
	  	30
		
	 Section 20. Tax Reporting
	  	30

			
		
	 Schedule I
	  	Purchase Price Calculation Example
		
	 Annex A
	  	Certain Definitions
		
	 Exhibit 1
	  	Purchase Exercise Notice
	 Exhibit 2
	  	Form of Opinion of Cooley Godward LLP

  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 PURCHASE OPTION AGREEMENT 
  
 This PURCHASE OPTION AGREEMENT (this “Agreement”) is entered into as of June 9, 2005 (the
“Closing Date”) by and among EXELIXIS, INC., a Delaware corporation (“Exelixis”), SYMPHONY EVOLUTION HOLDINGS LLC, a Delaware limited liability company (“Holdings”), and
SYMPHONY EVOLUTION, INC., a Delaware corporation (“Symphony Evolution”). Capitalized terms used herein and not defined herein shall have the meanings assigned to such terms in Annex A attached hereto. 
  
 PRELIMINARY STATEMENT 
  
 WHEREAS, Exelixis and Holdings have entered into a Technology License
Agreement pursuant to which Exelixis has granted Holdings an exclusive license (the “License”) to the use of certain intellectual property related to the Programs owned or controlled by Exelixis; 
  
 WHEREAS, contemporaneously with the execution of this Agreement, Exelixis,
Holdings and Symphony Evolution are entering into a Novated and Restated Technology License Agreement, pursuant to which, among other things, Holdings will assign by way of novation the License to Symphony Evolution; 
  
 WHEREAS, Exelixis and Holdings have entered into a Research and Development
Agreement pursuant to which Exelixis has agreed, amongst other things, to perform, on behalf of Holdings, research and development of the Programs; 
  
 WHEREAS, contemporaneously with the execution of this Agreement, Exelixis, Holdings and Symphony Evolution are entering into an Amended and Restated
Research and Development Agreement, pursuant to which, among other things, Holdings will assign its rights and obligations under the Research and Development Agreement to Symphony Evolution; 
  
 WHEREAS, contemporaneously with the execution of this Agreement, in order to
fund such research and development, institutional investors are committing to invest up to $80,000,000.00 in Holdings (the “Financing”) in exchange for membership interests in Holdings and for certain warrants (the
“Warrants”), to purchase up to a total of 2,000,000 shares of Exelixis Common Stock, to be initially issued to Holdings, and Holdings will agree to contribute the net proceeds of the Financing to Symphony Evolution;

  
 WHEREAS, the allocations of purchasable shares of Exelixis
Common Stock subject to the Warrants is based on a Committed Capital amount of $80,000,000.00, and if the Funded Capital is less than $80,000,000.00, then the allocation of purchasable Exelixis Common Stock subject to the Warrants shall be adjusted
proportionately; 
  
 WHEREAS, Holdings desires, in consideration
for the opportunity to receive A Warrants, B Warrants and C Warrants, to grant Exelixis an option to purchase all of the Common Stock of Symphony Evolution and any other Equity Securities issued by Symphony Evolution (together, the
“Symphony Evolution Equity Securities”) owned, or hereinafter acquired, by Holdings on the terms described in this Agreement; and 

  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 WHEREAS, Symphony Evolution and Holdings have determined that it is in each of its best interest to
perform and comply with certain agreements and covenants relating to each of its ongoing operations contained in this Agreement; 
  
 NOW, THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties hereto (the “Parties”) agree as follows: 
  
 Section 1. Grant of Purchase Option. 
  
 (a) Holdings hereby grants to Exelixis an exclusive option (the “Purchase Option”) to purchase all, but not less than all, of the outstanding Symphony Evolution Equity Securities owned or
hereinafter acquired by Holdings, in accordance with the terms of this Agreement. 
  
 (b) Symphony Evolution hereby covenants and agrees that all Symphony Evolution Equity Securities issued by Symphony Evolution at any time prior to the expiration of the Term (including to Holdings on, prior to, or
after the date hereof or to any other Person at any time whatsoever, in all cases prior to the expiration of the Term) shall be subject to a purchase option on the same terms as the Purchase Option (except as provided by the immediately following
sentence) and all of the other terms and conditions of this Agreement without any additional action on the part of Exelixis or Holdings. Further, to the extent Symphony Evolution shall issue any Symphony Evolution Equity Securities (including any
issuance in respect of a transfer of Symphony Evolution Equity Securities by any holder thereof, including Holdings) after the date hereof to any Person (including Holdings) (any issuance of such Symphony Evolution Equity Securities being subject to
the prior written consent of Exelixis as set forth in Sections 5(c) and 7(b) hereof, as applicable), Symphony Evolution hereby covenants and agrees that it shall cause such Symphony Evolution Equity Securities to be subject to the
Purchase Option without the payment of, or any obligation to pay, any additional consideration in respect of such Symphony Evolution Equity Securities by Exelixis, Symphony Evolution or any Symphony Evolution Subsidiary to the Person(s) acquiring
such subsequently issued Symphony Evolution Equity Securities, the Parties acknowledging and agreeing that the sole consideration payable by Exelixis for all of the outstanding Symphony Evolution Equity Securities now or hereinafter owned by any
Person shall be the Purchase Price. 
  
 (c) Exelixis’ right
to exercise the Purchase Option granted hereby is subject to the following conditions: 
  
 (i) The Purchase Option may only be exercised for the purchase of all, and not less than all, of Holdings’ Symphony Evolution Equity
Securities; 
  
 (ii) The Purchase Option may only
be exercised a single time; 
  

 2 
  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 (iii) Except as provided in Sections 1(c)(iv) and (v) below, the Purchase
Option may be exercised only during the period (the “Purchase Option Period”) commencing on and including June 9, 2006, 2006 (the “Purchase Option Commencement Date”) and ending on and including the
earlier of (x), June 9, 2009 the (“Final Termination Date”), and (y) the 90th calendar day (such 90th calendar day, the “Funds Termination Date”) immediately following the first date (each, a
“Balance Sheet Deficiency Date”) on which an internally prepared, unaudited, balance sheet of Symphony Evolution (prepared in accordance with GAAP) is delivered to Exelixis stating that the aggregate amount of (A) cash and
cash equivalents held by Symphony Evolution and (B) cash that will be received in connection with a pending Funding Notice provided by Holdings to the Investors pursuant to the Funding Agreement is less than $5,000,000 (unless extended in accordance
with Section 1(c)(iv); 
  
 (iv) In the
event that Exelixis has agreed to share the costs of additional research pursuant to the Research Cost Sharing and Extension Agreement (the “RCSEA”), the Purchase Option Period shall be determined in accordance with the RCSEA
(for the avoidance of doubt, funds advanced by Exelixis pursuant to the RCSEA shall not be included in any calculation of the Purchase Price hereunder); and 
  
 (v) In the event that Holdings terminates the Amended and Restated Research and Development Agreement following a material breach thereof
by Exelixis (as provided in Section 17.2 of the Amended and Restated Research Agreement), Exelixis shall have thirty (30) days in which to decide if it wishes to exercise the Purchase Option hereunder. Such exercise of the Purchase Option shall be
effected in accordance with the terms of this Agreement, except that such exercise may occur prior to the Purchase Option Commencement Date (an “Early Purchase Option Exercise”). 
  
 Section 2. Exercise of Purchase Option. 
  
 (a) Exercise Notice. Exelixis may exercise the Purchase Option only
by delivery of a notice in the form attached hereto as Exhibit 1 (the “Purchase Option Exercise Notice”) during the Purchase Option Period (or in the case of an Early Purchase Option Exercise, as set forth in
Section 1(c)(v)). The Purchase Option Exercise Notice shall be delivered on a Business Day to Holdings and Symphony Evolution and shall be irrevocable once delivered. The date on which the Purchase Option Exercise Notice is first delivered to
Holdings and Symphony Evolution is referred to as the “Purchase Option Exercise Date.” The Purchase Option Exercise Notice shall contain (1) an estimated date for the settlement of the Purchase Option (the
“Purchase Option Closing”), which date shall be estimated in accordance with this Section 2(a), (2) an estimated price for the exercise of the Purchase Option, calculated in accordance with Section 2(c) hereof,
and based on the estimated date of the Purchase Option Closing and the then-current financial statements of Symphony Evolution, and (3) if Exelixis intends to pay part of the Purchase Price in Exelixis Common Stock, notice of such intent, the number
of shares to be transferred as such purchase price, the valuation thereof and the percentage such portion bears to the estimated purchase price (which shall be no greater percentage than permitted under Section 2(c)). Such notice and election
shall be irrevocable once given and made. If, during the period between the Purchase Option Exercise Date and the Purchase Option Closing, the amount of cash and cash equivalents held by Symphony Evolution is an amount less than or equal to 

  

 3 
  

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IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 
$1,000,000 then Symphony Evolution shall cease payment of any amounts owed to Exelixis in respect of its activities pursuant to the Amended and Restated
Research and Development Agreement, but shall continue to pay amounts owed to all other Persons. The date of the Purchase Option Closing (the “Purchase Option Closing Date”) shall be determined as follows: 
  
 (i) If Exelixis elects to pay the entire Purchase Price in
cash, the Purchase Option Closing Date shall be the date that is the later of: (A) five (5) Business Days following the Purchase Option Exercise Date; and (B) five (5) Business Days following the date that Exelixis receives the necessary Government
Approvals related to its HSR Filings; provided, however that Exelixis and Holdings shall make all necessary HSR Filings within five (5) Business Days following the Purchase Option Exercise Date and shall diligently pursue the related
regulatory process; and provided, further that (1) if there is no second request from the Federal Trade Commission or the Department of Justice, as applicable, with respect to Exelixis’ or Holdings’ HSR Filings, then in no
event shall the Purchase Option Closing Date be more than sixty (60) days following the Purchase Option Exercise Date, and (2) if there is a second request from the Federal Trade Commission or the Department of Justice, as applicable, with respect
to Exelixis’ or Holdings’ HSR Filings, then in no event shall the Purchase Option Closing Date be more than one hundred and twenty (120) days following the Purchase Option Exercise Date. If Exelixis shall fail to make such cash payment
within such sixty (60) day period or one hundred and twenty (120) day period, as applicable, then in addition to any other rights that Holdings shall have hereunder, this Agreement shall terminate and Exelixis shall relinquish all rights hereunder
to purchase the Symphony Evolution Equity Securities; or 
  
 (ii) If Exelixis elects to pay a portion of the Purchase Price in Exelixis Common Stock (subject to the limitations set forth herein and in the Registration Rights Agreement), the Purchase Option Closing Date shall be
the date that is the later of: 
  
 (A) five (5)
Business Days following the Effective Registration Date of such Exelixis Common Stock; provided, that Exelixis shall file the Registration Statement contemplated by Section 3(b)(i) within (x) ten (10) Business Days after the Purchase
Option Exercise Date if Exelixis is eligible to use Form S-3 under the Securities Act (or any successor form), or (y) twenty (20) Business Days after the Purchase Option Exercise Date if Exelixis is not eligible to use Form S-3 under the Securities
Act (or any successor form); and 
  
 (B) five (5)
Business Days following the date that Exelixis receives the necessary Government Approvals related to its HSR Filings; provided, however, that Exelixis and Holdings shall make all necessary HSR Filings within five (5) Business Days
following the Purchase Option Exercise Date and shall diligently pursue the related regulatory process; 
  
 provided, further, that Exelixis shall use commercially reasonable efforts to have such Registration Statement declared effective by the
United States Securities and Exchange Commission as promptly as possible. In the event that such Registration Statement is not declared effective within one hundred and twenty (120) days of the Purchase Option 

  

 4 
  

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IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 
Exercise Date, Exelixis shall pay the full Purchase Price in cash within two (2) Business Days thereafter (in which event the Purchase Option Closing Date
shall be the date upon which such cash payment is made by Exelixis). If Exelixis shall fail to make such cash payment within such two (2) Business Day period, then in addition to any other rights that Holdings shall have hereunder, this Agreement
shall terminate and Exelixis shall relinquish all rights hereunder to purchase the Symphony Evolution Equity Securities. 
  
 (b) Purchase Price Upon Option Exercise. Upon exercise of the Purchase Option and as complete and full consideration for the sale to Exelixis by
Holdings of its Symphony Evolution Equity Securities (and for the Symphony Evolution Equity Securities of any other Person), Exelixis shall pay to Holdings the amount calculated pursuant to either clause (i), clause (ii) or clause
(iii) below (an example of which calculation is attached as Schedule I hereto), calculated for the date on which the Purchase Option Closing Date occurs (the “Funds Price”), minus the aggregate amounts of
any Debt or other liabilities (including any unpaid corporate tax liability resulting from an exercise of the Program Option, the exercise of the Discontinuation Option, or the sale or license of a discontinued or abandoned Program to
GlaxoSmithKline or other third party) owed to parties other than Exelixis, in excess of the cash and cash equivalents outstanding two (2) Business Days prior to the Purchase Option Closing Date (the “Net Debt”), as such Debt,
liabilities, cash and cash equivalents are reflected in the internal accounting records of Symphony Evolution (prepared in accordance with GAAP) (such amount, the “Purchase Price”): 
  
 (i) If the Purchase Option is exercised at any time on or
after December 11, 2006 (the “Purchase Option Interim Date”), then the Purchase Price shall be an amount equal to the sum of (A) the Funded Capital as of the Purchase Option Closing Date, plus (B) an amount equal to
25% per annum, compounded daily from the Closing Date, on such Funded Capital; provided that such return thereon shall be calculated according to the dates on which the Funded Capital was advanced; or 
  
 (ii) If the Purchase Option is exercised at any time on or
after the first anniversary of the Closing Date and prior to the Purchase Option Interim Date, then the Purchase Price shall be an amount equal to the Purchase Price calculated in accordance with Section 2(b)(i) hereof plus an amount
equal to [ * ] % of the Funded Capital as of the Purchase Option Closing Date; provided, however, that in no event shall the total Purchase Price under this Section 2(b)(ii) exceed a notional price that is an amount equal
to the Purchase Price, calculated pursuant to the terms of Section 2(b)(i), above, based on the actual amount of Funded Capital, and assuming that the Purchase Option Closing Date is the Purchase Option Interim Date; or 
  
 (iii) If, in the event of an Early Purchase Option Exercise
(as defined in Section 1(c)(v) hereof), the Purchase Option Closing Date occurs prior to the Purchase Option Commencement Date, then the Purchase Price shall be an amount equal to the sum of (A) the Funded Capital as of the Purchase Option
Closing Date, plus (B) an amount equal to 25% per annum, compounded daily for a term of one (1) year from the Closing Date, on such Funded Capital, plus (C) 

  

 5 
  

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IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 
an amount equal to [ * ] % of the Funded Capital as of the Purchase Option Closing Date; provided that such return thereon shall be calculated
according to the dates on which the Funded Capital was advanced; provided, further, that in no event shall the total Purchase Price under this Section 2(b)(iii) exceed a notional price that is an amount equal to the Purchase
Price, calculated pursuant to the terms of Section 2(b)(i), above, based on the actual amount of Funded Capital, and assuming that the Purchase Option Closing Date is the Purchase Option Interim Date. 
  
 Pursuant to clause (1) of Section (2)(a), Exelixis shall estimate the Purchase
Price as of the Purchase Option Exercise Date, and shall then provide, in writing, an update of such estimate based on the ongoing and updated financial statements of Symphony Evolution, which financial statements shall be provided to Exelixis by
Symphony Evolution on at least a monthly basis following the Purchase Option Exercise Date, on the fifth (5th)
Business Day preceding the proposed Purchase Option Closing Date and on the Purchase Option Closing Date. The Purchase Price will be calculated (based on a final calculation of the Funds Price and an updated calculation of the Net Debt as of such
date) as of the date chosen to be the Purchase Option Closing Date, and once so calculated (in accordance with this Section 2(b)) the Funds Price component of such Purchase Price shall remain unchanged for four (4) Business Dates following
the Purchase Option Closing Date used in such calculation, provided, however that the Net Debt component may be subject to revision in light of actual expenditures occurring during such period. If the Purchase Option Closing Occurs
five (5) or more Business Days after the Purchase Option Closing Date used to calculate such Purchase Price, then the Funds Price component of the Purchase Price shall be recalculated based on the new Purchase Option Closing Date, which recalculated
Funds Price shall likewise remain in effect for the following four (4) Business Days. In the event that (A) Exelixis has elected to exercise the Program Option (in accordance with the terms of Section 11.1(b) of the Amended and Restated Research and
Development Agreement), (B) Exelixis has elected to exercise the Discontinuation Option (in accordance with the terms of Section 11.2(a) of the Amended and Restated Research and Development Agreement), or (C) GlaxoSmithKline or a third party has
licensed any Licensed Intellectual Property related to a discontinued or abandoned Program (in accordance with Sections 11.2(b) of the Amended and Restated Research and Development Agreement), prior to Exelixis’ exercise of the Purchase Option
hereunder, the Purchase Price shall be reduced from the amount otherwise calculated herein by an amount equal to the Program Option Exercise Price, Discontinuation Price or price paid by GlaxoSmithKline or other third party, as applicable,
previously paid. In the event that, following the Purchase Option Closing Date, either Exelixis or Holdings objects to the calculation of Net Debt used to determine the final Purchase Price, then, within fifteen (15) Business Days of the Purchase
Option Closing Date, such objecting party shall provide written notice to the other party (a “Purchase Price Dispute Notice”) specifying the amount disputed and the basis for the dispute, together with supporting
documentation reflecting the analysis of and justification for any re-computation made; provided, however, that the dispute procedure set forth herein and in Section 2(j) hereof shall only apply to a dispute regarding the Net
Debt component of the Purchase Price, and shall not apply to the Funds Price component, which shall be finalized as of the Closing Date. In the event that a Purchase Price Dispute Notice is issued by either party, such dispute shall be resolved in
accordance with the terms of Section 2(j) hereof. For the avoidance of doubt, nothing in this Section 2 shall restrict or delay the Holdings’ distribution of the proceeds of the Purchase Option following the Purchase Option
Closing Date. 
  

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 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 (c) Form of Payment. Subject to Sections 2(a) and 2(e), the Purchase Price may be
paid in cash or in a combination of cash and Exelixis Common Stock, at the sole discretion of Exelixis; provided, that in no event may the value of Exelixis Common Stock (determined in accordance with Section 2(e) hereof) delivered in
connection with the exercise of the Purchase Option constitute more than 33% of the total consideration to be tendered for payment of the Purchase Option Exercise Price, calculated using the Exelixis Common Stock Valuation (as defined herein)
procedure. 
  
 (d) Surrender of Symphony Evolution Equity
Securities. Subject to the terms and conditions of this Agreement, on or prior to the Purchase Option Closing Date, Holdings shall surrender to Exelixis its certificates representing its Symphony Evolution Equity Securities, and shall convey
good title to such Symphony Evolution Equity Securities, free from any Encumbrances and from any and all restrictions that any sale, assignment or other transfer of such Symphony Evolution Equity Securities be consented to or approved by any Person.
On or prior to the Purchase Option Closing Date, Holdings shall remove all directors serving on the Symphony Board, other than the Exelixis Director (as defined in Section 4(b)(iv) hereof) from the Symphony Board as of the Purchase Option
Closing Date. 
  
 (e) Valuation of Exelixis Stock. In the
event that Exelixis elects to pay part of the Purchase Price through the delivery to Holdings of Exelixis Common Stock, the value per share thereof (the “Exelixis Common Stock Valuation”) shall equal the average closing price
of Exelixis Common Stock, as reported in the Wall Street Journal, on the NASDAQ National Market, or other national exchange that is the primary exchange on which Exelixis Common Stock is listed, for the 30 trading days immediately preceding
the second trading day prior to the Purchase Option Exercise Date. If Exelixis Common Stock is not traded on a national exchange or the NASDAQ National Market, then Exelixis shall be obligated to pay the Purchase Price solely in cash on the Purchase
Option Closing Date. Exelixis shall calculate the Exelixis Common Stock Valuation in accordance with this Section 2(e), subject to review and concurrence by Holdings. 
  
 (f) Share Certificates. Any stock certificate(s) issued by Exelixis for Exelixis Common Stock pursuant to this Section
2 may contain a legend (the “33 Act Legend”) substantially as follows: 
  
 THE SHARES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR UNDER THE SECURITIES LAWS OF ANY
STATE, AND THE SAME HAVE BEEN ISSUED IN RELIANCE ON EXEMPTIONS FROM THE REGISTRATION REQUIREMENTS OF SAID ACT AND SUCH LAWS. SUCH SHARES MAY NOT BE SOLD, TRANSFERRED, PLEDGED, HYPOTHECATED OR OTHERWISE DISPOSED OF EXCEPT AS PERMITTED UNDER SUCH
SECURITIES LAWS, PURSUANT TO REGISTRATION OR EXEMPTION THEREFROM. 
  
 This legend
shall be removed by Exelixis, subject to, and in accordance with, the terms of Section 3(b)(iii) hereof. 
  

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IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 (g) Government Approvals. On or prior to the Purchase Option Closing Date, each of Exelixis,
Symphony Evolution and Holdings shall have taken all necessary action to cause all Governmental Approvals with respect to such Party (including, without limitation, the preparing and filing of the pre-merger notification and report forms required
under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended (“HSR Act Filings”)) required to be in effect in connection with the transactions contemplated by this Agreement to be in effect; provided,
however, that with respect to Government Approvals required by a Governmental Authority other than the United States federal government and its various branches and agencies, the Parties’ obligations under this Section 2(g) shall
be limited to causing to be in effect only those Government Approvals, the failure of which to be in effect would, either individually or in the aggregate, reasonably be expected to have a Material Adverse Effect on any of the Parties. Each of
Symphony Evolution and Exelixis shall pay its own costs associated with taking such action. Symphony Evolution shall pay any costs of Holdings associated with obtaining Government Approvals required in connection with the exercise of the Purchase
Option. All other costs and expenses of Holdings shall be paid by Holdings pursuant to Section 8(b) hereof, including any costs arising from any error in Holdings’ initial valuation of its investment in Symphony Evolution. 
  
 (h) Transfer of Title. Transfer of title to Exelixis of all of the
Symphony Evolution Equity Securities shall be deemed to occur automatically on the Purchase Option Closing Date, subject to the payment by Exelixis on such date of the Purchase Price and its performance of its other obligations herein required to be
performed under Sections 2(e) and (g), and under the Registration Rights Agreement, as applicable, on or prior to the Purchase Option Closing Date to the satisfaction of Holdings, and thereafter Symphony Evolution shall be entitled to
treat Exelixis as the sole holder of all Symphony Evolution Equity Securities, notwithstanding the failure of Holdings to tender certificates representing such shares to Exelixis in accordance with Section 2(d) hereof. After the Purchase
Option Closing Date, Holdings shall have no rights in connection with such Symphony Evolution Equity Securities other than the right to receive the Purchase Price; provided, however, that nothing in this Section 2(h) shall
affect the survivability of any indemnification provision in this Agreement upon termination of this Agreement. 
  
 (i) Consents and Authorizations. On or prior to the Purchase Option Closing Date, Exelixis shall have obtained all consents and authorizations
necessary from stockholders and/or its board of directors for the consummation of the exercise and closing of the Purchase Option, as may be required under the organizational documents of Exelixis, any prior stockholders or board resolution, any
stock exchange or similar rules or any applicable law; provided, however, that with respect to consents or authorizations required by a Governmental Authority other than the United States federal government and its various branches and
agencies, the Parties’ obligations under this Section 2(i) shall be limited to obtaining only those consents and authorizations, the failure of which to be obtained would, either individually or in the aggregate, reasonably be expected
to have a Material Adverse Effect on any of the Parties. 
  
 (j)
Purchase Price Adjustment. 
  
 (i) In the event
that either Holdings or Exelixis delivers to the other a Purchase Price Dispute Notice within the time limit set forth in Section 2(b) hereof, then both Holdings and Exelixis shall make good faith efforts to resolve any dispute relating to

  

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IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 
the calculation of the Net Debt component of the Purchase Price through negotiations for a period of five (5) Business Days following the date on which a
Purchase Price Dispute Notice is delivered. If Holdings and Exelixis agree on the calculation of the Net Debt component of the Purchase Price (or a revision thereto) before or within such five (5) Business Day period, and (x) the recalculated Net
Debt results in a recalculated Purchase Price (including as revised through negotiations) that is less than the Purchase Price paid on the Purchase Option Closing Date, then Holdings shall promptly, and in any event within five (5) Business Days of
the date on which the Purchase Price recalculation becomes final, pay to Exelixis the amount by which the recalculated Purchase Price is less than Purchase Price paid on the Purchase Option Closing Date, or (y) the recalculated Net Debt results in a
recalculated Purchase Price (including as revised through negotiations) that is greater than the Purchase Price paid on the Purchase Option Closing Date, then Exelixis shall promptly, and in any event within five (5) Business Days of the date on
which the recalculated Purchase Price becomes final, pay to Holdings the amount by which the recalculated Purchase Price is greater than the Purchase Price paid on the Purchase Option Closing Date. In the event that neither of the conditions set
forth in the previous clauses (x) and (y) exist, then no payment shall be made. 
  
 (ii) To the extent that any matter remains unresolved following negotiations during such five (5) Business Day period (as determined by
notice by any party to the other party), Exelixis and Holdings shall jointly select an independent accountant of recognized national standing to resolve any remaining disagreements, which independent accountant shall not have provided services to
either of Exelixis, Holdings or any of their respective Affiliates during the five-year period preceding the date of its selection (the “Independent Accountant”). Exelixis and Holdings shall use their respective commercially
reasonable efforts to cause such Independent Accountant to make its determination of the Purchase Price (the “Final Purchase Price”) within sixty (60) days of accepting its selection. The decision of the Independent
Accountant shall be a final, binding and conclusive resolution of the parties’ dispute, shall be non-appealable and shall not be subject to further review. The costs and expenses of the Independent Accountant shall be split between Holdings and
Exelixis in proportion to the difference between the Final Purchase Price and the Purchase Price (recalculated, if applicable, pursuant to Section 2(j)(i)). Notwithstanding the foregoing, in any case, each of Exelixis and Holdings shall be
responsible for the payment of its respective costs and expenses, including any attorneys’ and accountants’ fees (other than any accountants’ fees payable to the Independent Accountant, which shall be split between the parties in
accordance with this Section 2(j)) incurred in connection with the dispute. If the Final Purchase Price is less than the Purchase Price paid on the Purchase Option Closing Date, then Holdings shall promptly, and in any event within five (5)
Business Days of the date on which the Independent Accountant makes its determination of the Final Purchase Price, pay to Exelixis the amount by which the Final Purchase Price is less than the Purchase Price paid on the Purchase Option Closing Date.
If the Final Purchase Price is greater than the Purchase Price paid on the Purchase Option Closing Date, then Exelixis shall promptly, and in any event within five (5) Business Days of the date on which the Independent Accountant makes its
determination of the Final Purchase Price, pay to Holdings the amount by which the Final Purchase Price is greater than the Purchase Price paid on the Purchase Option Closing Date. In the event that neither of the conditions set forth in the
previous two sentences exist, then no payment shall be made. 
  

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IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 Section 3. Exelixis Representations, Warranties and Covenants. 
  
 (a) As of the date hereof, Exelixis hereby represents and warrants, and,
except to the extent that any of the following representations and warranties is limited to the date of this Agreement or otherwise limited, on the Purchase Option Closing Date, shall be deemed to have represented and warranted, to Holdings and
Symphony Evolution that: 
  
 (i)
Organization. Exelixis is a corporation, duly organized, validly existing and in good standing under the laws of the State of Delaware. 
  
 (ii) Authority and Validity. Other than in respect of the exercise of the Purchase Option pursuant to Section 2(a) (which is
subject to future approval by Exelixis’ board of directors and potentially Exelixis’ stockholders if required by applicable NASDAQ or other stock exchange rules), Exelixis has all requisite corporate power and authority to execute, deliver
and perform its obligations under this Agreement and to consummate the transactions contemplated hereby. The execution, delivery and performance by Exelixis of this Agreement and the consummation of the transactions contemplated hereby have been
duly and validly authorized by all necessary action required on the part of Exelixis (other than in respect of the exercise of the Purchase Option pursuant to Section 2(a) which is subject to future approval by Exelixis’ board of
directors and potentially Exelixis’ stockholders if required by applicable NASDAQ or other stock exchange rules), and no other proceedings on the part of Exelixis are necessary to authorize this Agreement or for Exelixis to perform its
obligations under this Agreement. This Agreement constitutes the lawful, valid and legally binding obligation of Exelixis, enforceable in accordance with its terms, except as the same may be limited by applicable bankruptcy, insolvency,
reorganization, moratorium or similar laws affecting the enforcement of creditors’ rights generally and general equitable principles regardless of whether such enforceability is considered in a proceeding at law or in equity. 
  
 (iii) No Violation or Conflict. The execution,
delivery and performance of this Agreement and the transactions contemplated hereby do not (A) violate, conflict with or result in the breach of any provision of the Organizational Documents of Exelixis, (B) as of the date of this Agreement, and as
of the Purchase Option Closing Date if Exelixis elects to pay part of the Purchase Price through the delivery of Exelixis Common Stock (a “Partial Stock Payment”), conflict with or violate any law or Governmental Order
applicable to Exelixis or any of its assets, properties or businesses, or (C) conflict with, result in any breach of, constitute a default (or event that with the giving of notice or lapse of time, or both, would become a default) under, require any
consent under, or give to others any rights of termination, amendment, acceleration, suspension, revocation or cancellation of, or result in the creation of any Encumbrance on any of the assets or properties of Exelixis, pursuant to, any note, bond,
mortgage or indenture, contract, agreement, lease, sublease, license, permit, franchise or other instrument or arrangement to which Exelixis is a party except, in the case of clauses (B) and (C), to the extent that such conflicts,
breaches, defaults or other matters would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect on Exelixis. 
  

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IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 (iv) Governmental Consents and Approvals. Other than any HSR Act Filings and
Additional Regulatory Filings which, if the Purchase Option is exercised by Exelixis, will be obtained on or prior to the Purchase Option Closing Date, and any Governmental Approvals relating to federal securities or state “blue sky” laws,
the execution, delivery and performance of this Agreement by Exelixis do not, and the consummation of the transactions contemplated hereby do not and will not, require any Governmental Approval which has not already been obtained, effected or
provided, except with respect to which the failure to so obtain, effect or provide would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect on Exelixis. 
  
 (v) Litigation. As of the date of this Agreement, and
as of the Purchase Option Closing Date if Exelixis elects to make a Partial Stock Payment, there are no actions by or against Exelixis pending before any Governmental Authority or, to the knowledge of Exelixis, threatened to be brought by or before
any Governmental Authority, that would, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect on Exelixis. There are no pending or, to the knowledge of Exelixis, threatened actions, to which Exelixis is a party
(or is threatened to be named as a party) to set aside, restrain, enjoin or prevent the execution, delivery or performance of this Agreement or the Operative Documents or the consummation of the transactions contemplated hereby or thereby by any
party hereto or thereto. As of the date of this Agreement, and as of the Purchase Option Closing Date if Exelixis elects to make a Partial Stock Payment, Exelixis is not subject to any Governmental Order (nor, to the knowledge of Exelixis, is there
any such Governmental Order threatened to be imposed by any Governmental Authority) that would, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect on Exelixis. 
  
 (b) Exelixis hereby covenants and agrees with Holdings as follows:

  
 (i) Immediately prior to the Purchase Option
Closing Date, Exelixis shall have sufficient amounts of cash and, if applicable, authorized but unissued, freely transferable and nonassessable Exelixis Common Stock available to satisfy the portion of the Purchase Price to be paid in cash or
Exelixis Common Stock pursuant to Sections 2(b) and 2(c). In the event that Exelixis elects to satisfy any portion of the Purchase Price in Exelixis Common Stock, Exelixis shall have available, on the Purchase Option Closing
Date, a Registration Statement declared effective by the Securities and Exchange Commission for the resale of any such shares of Exelixis Common Stock to be delivered in partial satisfaction of the Purchase Price, accompanied by evidence reasonably
acceptable to Holdings that such Exelixis Common Stock has been approved for listing on the NASDAQ national market. 
  
 (ii) If Exelixis elects to satisfy any portion of the Purchase Price in Exelixis Common Stock, Exelixis shall convey good and marketable
title to such Exelixis Common Stock, free from any Encumbrances and, except as otherwise contemplated in Section 2(f) of this Agreement, from any and all restrictions that any issuance, sale, assignment or other transfer of such Exelixis
Common Stock be consented to or approved by any Person. 
  

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IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 (iii) If the share certificates representing such Exelixis Common Stock include the 33
Act Legend (as set forth in Section 2(f) hereof), Exelixis shall, within three (3) Business Days of receiving a request from Holdings or any “Investor” (as defined in the Registration Rights Agreement), remove or cause
to be removed the 33 Act Legend from the such share certificates as Holdings or such Investor shall designate, so long as (x) the Exelixis Common Stock represented by such share certificates has been transferred to a third party in compliance with
the registration requirements of the Securities Act or an available exemption therefrom, and (y) Exelixis receives a certification from Holdings, such Investor or a securities broker designated by Holdings or such Investor to the effect that the
sale of such Exelixis Common Stock was made under a Registration Statement and accompanied by the delivery of a current prospectus. 
  
 (iv) Upon the termination of this Agreement without the exercise of the Purchase Option, or as soon thereafter as is practical, Exelixis
shall deliver to Symphony Evolution all regulatory submissions, clinical master files, development plans, consultant inputs, manufacturing reports and, to the extent requested by Symphony, other materials, documents, files and other information
relating to the Programs and necessary to enable Symphony Evolution to continue the development of the Programs (or, where necessary, copies thereof). 
  
 (v) In the event that Exelixis exercises the Purchase Option, then Exelixis shall maintain the separate corporate existence of Symphony
Evolution for a minimum of two (2) years following such exercise, unless such maintenance would have a Material Adverse Effect on Exelixis or any of its Affiliates. 
  
 Section 4. Holdings Representations, Warranties and Covenants. 
  
 (a) As of the date hereof, Holdings hereby represents and warrants, and,
except to the extent that any of the following representations and warranties is limited to the date of this Agreement or otherwise limited, and on the Purchase Option Closing Date, shall be deemed to have represented and warranted, to Exelixis and
Symphony Evolution that: 
  
 (i)
Organization. Holdings is a limited liability company, duly formed, validly existing and in good standing under the laws of the State of Delaware. 
  
 (ii) Authority and Validity. Holdings has all requisite limited liability company power and authority to execute, deliver and
perform its obligations under this Agreement and to consummate the transactions contemplated hereby. The execution, delivery and performance by Holdings of this Agreement and the consummation of the transactions contemplated hereby have been duly
and validly authorized by all necessary action required on the part of Holdings, and no other proceedings on the part of Holdings are necessary to authorize this Agreement or for Holdings to perform its obligations under this Agreement. This
Agreement constitutes the lawful, valid and legally binding obligation of Holdings, enforceable in accordance with its terms, except as the same may 

  

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IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
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OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 
be limited by applicable bankruptcy, insolvency, reorganization, moratorium or similar laws affecting the enforcement of creditors’ rights generally and
general equitable principles regardless of whether such enforceability is considered in a proceeding at law or in equity. 
  
 (iii) No Violation or Conflict. The execution, delivery and performance of this Agreement and the transactions contemplated hereby
do not (A) violate, conflict with or result in the breach of any provision of the Organizational Documents of Holdings, (B) as of the date of this Agreement, conflict with or violate any law or Governmental Order applicable to Holdings or any of its
assets, properties or businesses, or (C) as of the date of this Agreement, conflict with, result in any breach of, constitute a default (or event that with the giving of notice or lapse of time, or both, would become a default) under, require any
consent under, or give to others any rights of termination, amendment, acceleration, suspension, revocation or cancellation of, or result in the creation of any Encumbrance on any of the assets or properties of Holdings, pursuant to, any note, bond,
mortgage or indenture, contract, agreement, lease, sublease, license, permit, franchise or other instrument or arrangement to which Holdings is a party except, in the case of clauses (B) and (C), to the extent that such conflicts,
breaches, defaults or other matters would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect on Holdings. 
  
 (iv) Governmental Consents and Approvals. The execution, delivery and performance of this Agreement by Holdings do not, and the
consummation of the transactions contemplated hereby do not and will not, require any Governmental Approval which has not already been obtained, effected or provided, except with respect to which the failure to so obtain, effect or provide would
not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect on Holdings. 
  
 (v) Litigation. As of the date of this Agreement, there are no actions by or against Holdings pending before any Governmental
Authority or, to the knowledge of Holdings, threatened to be brought by or before any Governmental Authority, that would, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect on Holdings. There are no pending
or, to the knowledge of Holdings, threatened actions to which Holdings is a party (or is threatened to be named as a party) to set aside, restrain, enjoin or prevent the execution, delivery or performance of this Agreement or the Operative Documents
or the consummation of the transactions contemplated hereby or thereby by any party hereto or thereto. As of the date of this Agreement, Holdings is not subject to any Governmental Order (nor, to the knowledge of Holdings, is there any such
Governmental Order threatened to be imposed by any Governmental Authority) that would, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect on Holdings. 
  
 (vi) Stock Ownership. All of Symphony
Evolution’s issued and outstanding Symphony Evolution Equity Securities are owned beneficially and of record by Holdings, free and clear of any and all encumbrances. 
  

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IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 (vii) Interim Operations. Holdings was formed solely for the purpose of engaging
in the transactions contemplated by the Operative Documents, has engaged in no other business activities and has conducted its operations only as contemplated by the Operative Documents. 
  
 (viii) Accredited Investor. 
  
 (A) Holdings is and will remain at all relevant times an Accredited Investor. 
  
 (B) Holdings has relied completely on the advice of, or has
consulted with or has had the opportunity to consult with, its own personal tax, investment, legal or other advisors and has not relied on Exelixis or any of its Affiliates for advice related to any offer and sale of Exelixis Common Stock in
connection with the Purchase Option. Holdings has reviewed the Investment Overview and is aware of the risks disclosed therein. Holdings acknowledges that it has had a reasonable opportunity to conduct its own due diligence with respect to the
Products, the Programs, Symphony Evolution, Exelixis and the transactions contemplated by the Operative Documents. 
  
 (C) Holdings is able to bear the economic risk of such investment for an indefinite period and to afford a complete loss thereof

  
 (D) Holdings agrees that the Exelixis Common
Stock may not be resold (A) without registration thereof under the Securities Act (unless an exemption from such registration is available), or (B) in violation of any law. 
  
 (E) No person or entity acting on behalf of, or under the authority of, Holdings is or will be entitled to
any broker’s, finder’s, or similar fees or commission payable by Exelixis or any of its Affiliates. 
  
 (b) Holdings hereby covenants and agrees with Exelixis as follows: 
  
 (i) Contribution to Symphony Evolution. On or prior to June 21, 2005, Holdings shall, pursuant to the
Subscription Agreement, use the Initial Funds (as defined in the Funding Agreement) to pay to Symphony Evolution the Stock Purchase Price (in accordance with, and as defined in, the Subscription Agreement), in respect of the 50,000 shares of Common
Stock delivered to Holdings by Symphony Evolution as of the Closing Date. Additionally, (1) upon receipt of a request for additional funds from Symphony Evolution, Holdings shall, promptly (but in no event later than the fifth (5th) day after the receipt of such request) and in accordance with the terms of Section 2 of the Funding Agreement, submit to
Investors a Funding Notice; provided, that if Holdings has received a Purchase Option Exercise Notice, it shall not submit to Investors a Funding Notice, and (2) upon Holdings receiving any additional net proceeds from any financing received
from Investors in accordance with the Funding Agreement for the purpose of the contribution of such proceeds to Symphony Evolution, Holdings shall contribute such proceeds thereof to Symphony Evolution. 
  

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IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 (ii) Encumbrance. Holdings will not, and will not permit any of its Subsidiaries
to, create, assume or suffer to exist any Encumbrance on any of its Symphony Evolution Equity Securities (each, a “Symphony Evolution Securities Encumbrance”) except with the prior written consent of Exelixis. 
  
 (iii) Transfer and Amendment. Commencing upon the
date hereof and ending upon the earlier to occur of (x) the Purchase Option Closing Date and (y) the expiration of the Purchase Option Period (such period, the “Term”), the manager of Holdings shall not (A) transfer, or
permit the transfer of, any Membership Interest without the prior written consent of Exelixis or (B) amend, or permit the amendment of, any provisions relating to the transfer of Membership Interests, as set forth in Section 7.02 of the Holdings LLC
Agreement, to the extent such amendment would adversely affect Exelixis’ right of consent set forth in Sections 7.02(b)(i) and 7.02(c) of the Holdings LLC Agreement. 
  
 (iv) Symphony Evolution Directors. During the Term, Holdings agrees to vote all of its Symphony
Evolution Equity Securities (or to exercise its right with respect to such Symphony Evolution Equity Securities to consent to action in writing without a meeting) in favor of, as applicable, the election, removal and replacement of one director of
the Symphony Evolution Board, and any successor thereto, designated by Exelixis (the “Exelixis Director”) as directed by Exelixis, and the appointment of one representative of GlaxoSmithKline, designated by Exelixis, as a
non-voting observer on the Symphony Evolution Board, and any successor thereto. In furtherance and not in limitation of the foregoing, Holdings hereby grants to Exelixis an irrevocable proxy, with respect to all Symphony Evolution Equity Securities
now owned or hereafter acquired by Holdings, to vote such Symphony Evolution Equity Securities or to exercise the right to consent to action in writing without a meeting with respect to such Symphony Evolution Equity Securities, such irrevocable
proxy to be exercised solely for the limited purpose of (i) electing, removing and replacing the Exelixis Director and (ii) the appointment of a representative of GlaxoSmithKline chosen by Exelixis as a non-voting observer on the Symphony Evolution
Board, in the event of the failure or refusal of Holdings to elect, remove or replace such Exelixis Director, or appoint a representative of GlaxoSmithKline chosen by Exelixis as a non-voting observer on the board of directors of Symphony Evolution,
as directed by Exelixis. Additionally, Holdings agrees, during the Term, to allow Exelixis to consent (such consent not to be unreasonably delayed or withheld) to the selection of two (2) of the four (4) directors of Symphony Evolution not chosen by
Holdings at the direction of Exelixis, and any successors thereto. 
  
 (v) Symphony Evolution Board. During the Term, Holdings shall not vote any of its Symphony Evolution Equity Securities (or exercise its rights with respect to such Symphony Evolution Equity Securities by
written consent without a meeting) to increase the size of the Symphony Evolution Board to more than five (5) members without the prior written consent of Exelixis. 
  
 (vi) Symphony Evolution Charter. During the Term, Holdings shall not approve or permit any amendment
to Article IV, Paragraphs (1) and (3); Article VI; Article VII; Article X; Article XI or Article XIII of the Symphony Evolution Charter without the prior written consent of Exelixis. 
  

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IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 Section 5. Symphony Evolution Representations, Warranties and Covenants. 
  
 (a) As of the date hereof, Symphony Evolution hereby represents and
warrants, and, except to the extent that any of the following representations and warranties is limited to the date of this Agreement or otherwise limited, on the Purchase Option Closing Date, shall be deemed to have represented and warranted, to
Exelixis and Holdings that: 
  
 (i)
Organization. Symphony Evolution is a corporation, duly organized, validly existing and in good standing under the laws of the State of Delaware. 
  
 (ii) Authority and Validity. Symphony Evolution has all requisite corporate power and authority to execute, deliver and perform its
obligations under this Agreement and to consummate the transactions contemplated hereby. The execution, delivery and performance by Symphony Evolution of this Agreement and the consummation of the transactions contemplated hereby have been duly and
validly authorized by all necessary action required on the part of Symphony Evolution, and no other proceedings on the part of Symphony Evolution are necessary to authorize this Agreement or for Symphony Evolution to perform its obligations under
this Agreement. This Agreement constitutes the lawful, valid and legally binding obligation of Symphony Evolution, enforceable in accordance with its terms, except as the same may be limited by applicable bankruptcy, insolvency, reorganization,
moratorium or similar laws affecting the enforcement of creditors’ rights generally and general equitable principles regardless of whether such enforceability is considered in a proceeding at law or in equity. 
  
 (iii) No Violation or Conflict. The execution,
delivery and performance of this Agreement and the transactions contemplated hereby do not (A) violate, conflict with or result in the breach of any provision of the Organizational Documents of Symphony Evolution, (B) conflict with or violate any
law or Governmental Order applicable to Symphony Evolution or any of its assets, properties or businesses, or (C) conflict with, result in any breach of, constitute a default (or event that with the giving of notice or lapse of time, or both, would
become a default) under, require any consent under, or give to others any rights of termination, amendment, acceleration, suspension, revocation or cancellation of, or result in the creation of any Encumbrance on any of the assets or properties of
Symphony Evolution, pursuant to, any note, bond, mortgage or indenture, contract, agreement, lease, sublease, license, permit, franchise or other instrument or arrangement to which Symphony Evolution is a party except, in the case of clauses
(B) and (C), to the extent that such conflicts, breaches, defaults or other matters would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect on Symphony Evolution. 
  
 (iv) Governmental Consents and Approvals. The
execution, delivery and performance of this Agreement by Symphony Evolution do not, and the consummation of the transactions contemplated hereby do not and will not, require any Governmental Approval which has not already been obtained, effected or
provided, except with respect 

  

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IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 
to which the failure to so obtain, effect or provide would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect on
Symphony Evolution. 
  
 (v) Litigation.
There are no actions by or against Symphony Evolution pending before any Governmental Authority or, to the knowledge of Symphony Evolution, threatened to be brought by or before any Governmental Authority that would, individually or in the
aggregate, reasonably be expected to have a Material Adverse Effect on Symphony Evolution. There are no pending or, to the knowledge of Symphony Evolution, threatened actions to which Symphony Evolution is a party (or is threatened to be named as a
party) to set aside, restrain, enjoin or prevent the execution, delivery or performance of this Agreement or the Operative Documents or the consummation of the transactions contemplated hereby or thereby by any party hereto or thereto. Symphony
Evolution is not subject to any Governmental Order (nor, to the knowledge of Symphony Evolution, is there any such Governmental Order threatened to be imposed by any Governmental Authority) that would, individually or in the aggregate, reasonably be
expected to have a Material Adverse Effect on Symphony Evolution. 
  
 (vi) Capitalization. Holdings is the beneficial and record owner of all issued and outstanding Symphony Evolution Equity Securities. No shares of Symphony Evolution capital stock are held in treasury by
Symphony Evolution or any Symphony Evolution Subsidiary. All of the issued and outstanding Symphony Evolution Equity Securities (A) have been duly authorized and validly issued and are fully paid and nonassessable, (B) were issued in compliance with
all applicable state and federal securities laws, and (C) were not issued in violation of any preemptive rights or rights of first refusal. No preemptive rights or rights of first refusal exist with respect to any Symphony Evolution Equity
Securities and no such rights will arise by virtue of or in connection with the transactions contemplated hereby (other than for the Purchase Option). Other than the Purchase Option, there are no outstanding options, warrants, call rights,
commitments or agreements of any character to acquire any Symphony Evolution Equity Securities. There are no outstanding stock appreciation, phantom stock, profit participation or other similar rights with respect to Symphony Evolution. Symphony
Evolution is not obligated to redeem or otherwise acquire any of its outstanding Symphony Evolution Equity Securities. 
  
 (vii) Interim Operations. Symphony Evolution was formed solely for the purpose of engaging in the transactions contemplated by the
Operative Documents, has engaged in no other business activities and has conducted its operations only as contemplated by the Operative Documents. 
  
 (viii) Investment Company. Symphony Evolution is not, and after giving effect to the transactions contemplated by the Operative
Documents will not be, required to register as an “investment company” as such term is defined in the Investment Company Act of 1940, as amended. 
  

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 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 (b) Symphony Evolution covenants and agrees that: 
  
 (i) Symphony Evolution will comply with all laws, ordinances
or governmental rules or regulations to which it is subject and will obtain and maintain in effect all licenses, certificates, permits, franchises and other Governmental Approvals necessary to the ownership of its properties or to the conduct of its
business, in each case to the extent necessary to ensure that non-compliance with such laws, ordinances or governmental rules or regulations or failures to obtain or maintain in effect such licenses, certificates, permits, franchises and other
Governmental Approvals would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect on Symphony Evolution. 
  
 (ii) Symphony Evolution will file (or cause to be filed) all material tax returns required to be filed by it and pay all taxes shown to be
due and payable on such returns and all other taxes imposed on it or its assets to the extent such taxes have become due and payable and before they have become delinquent and shall pay all claims for which sums have become due and payable that have
or might become attached to the assets of Symphony Evolution; provided, that Symphony Evolution need not file any such tax returns or pay any such tax or claims if (A) the amount, applicability or validity thereof is contested by Symphony
Evolution on a timely basis in good faith and in appropriate proceedings, and Symphony Evolution has established adequate reserves therefor in accordance with GAAP on the books of Symphony Evolution or (B) the failure to file such tax returns or the
nonpayment of such taxes and assessments, individually or in the aggregate, could not reasonably be expected to have a Material Adverse Effect on Symphony Evolution. 
  
 (iii) Symphony Evolution will at all times preserve and keep in full force and effect its corporate
existence. 
  
 (iv) Symphony Evolution will keep
complete, proper and separate books of record and account, including a record of all costs and expenses incurred, all charges made, all credits made and received, and all income derived in connection with the operation of the business of Symphony
Evolution, all in accordance with GAAP, in each case to the extent necessary to enable Symphony Evolution to comply with the periodic reporting requirements of this Agreement. 
  
 (v) Symphony Evolution will perform and observe in all material respects all of the terms and provisions of
each Operative Document to be performed or observed by it, maintain each such Operative Document to which it is a party, promptly enforce in all material respects each such Operative Document in accordance with its terms, take all such action to
such end as may be from time to time reasonably requested by Holdings or Exelixis and make to each other party to each such Operative Document such demands and requests for information and reports or for action as Symphony Evolution is entitled to
make under such Operative Document. 
  
 (vi)
Symphony Evolution shall permit the representatives of Holdings (including Holdings’ members and their respective representatives), each Symphony Fund and Exelixis, at each of their own expense and upon reasonable prior notice to Symphony
Evolution, to visit the principal executive office of Symphony Evolution, to 

  

 18 
  

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IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 
discuss the affairs, finances and accounts of Symphony Evolution with Symphony Evolution’s officers and (with the consent of Symphony Evolution, which
consent will not be unreasonably withheld) its Auditors, all at such reasonable times and as often as may be reasonably requested in writing. 
  
 (vii) Symphony Evolution shall permit each Symphony Fund, at its own expense and upon reasonable prior notice to Symphony Evolution, to
inspect and copy Symphony Evolution’s books and records and inspect Symphony Evolution’s properties at reasonable times. 
  
 (viii) Symphony Evolution shall allow Exelixis or its designated representatives to have reasonable visitation and inspection rights with
regard to the Programs and materials, documents and other information relating thereto. 
  
 (ix) Symphony Evolution shall permit each Symphony Fund to consult with and advise the management of Symphony Evolution on matters
relating to the research and development of the Programs in order to develop the Product. 
  
 (x) On the Purchase Option Closing Date, or as soon thereafter as is practical, Symphony Evolution shall deliver to Exelixis all
materials, documents, files and other information relating to the Programs (or, where necessary, copies thereof). 
  
 (xi) During the Term, Exelixis shall have the right to consent to any increase in the size of the Symphony Evolution Board to more than
five (5) directors and one (1) non-voting observer. 
  
 (xii) During the Term, Exelixis shall have the right to designate, remove and replace one (1) director of the Symphony Evolution Board, appoint a representative of GlaxoSmithKline chosen by Exelixis as a non-voting observer on the Symphony
Evolution Board, and consent to the selection of two (2) of the four (4) directors of Symphony Evolution not chosen by Holdings at the direction of Exelixis, in each case including any successors thereto and in accordance with the terms of
Section 4(b)(iv). 
  
 (xiii) Symphony
Evolution shall indemnify the directors and officers of Symphony Evolution against liability incurred by reason of the fact that such Person is or was a director or officer of Symphony Evolution, as permitted by Article VII of the Symphony Evolution
Charter and Section 9.01 of the Symphony Evolution By-laws, as set forth in, and on the terms of, the Indemnification Agreement and the Management Services Agreement, respectively. 
  
 (xiv) During the Term, Symphony Evolution shall comply with, and cause any Persons acting for it to comply
with, the terms of the Investment Policy with respect to the investment of any funds held by it. 
  

 19 
  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 (c) Symphony Evolution covenants and agrees that, until the expiration of the Term, it shall not, and
shall cause its Subsidiaries (if any) not to, without Exelixis’ prior written consent (such consent, in the case of clause (x) below, not to be unreasonably withheld): 
  
 (i) issue any Symphony Evolution Equity Securities or any Equity Securities of any Subsidiary thereof (other
than any issuances of Equity Securities by Symphony Evolution made in accordance with Section 1(b) hereof to Holdings so long as Symphony Evolution is a wholly owned subsidiary of Holdings, or by a Subsidiary of Symphony Evolution to Symphony
Evolution or to another wholly owned Subsidiary of Symphony Evolution); provided, however, that any such Symphony Evolution Equity Securities so issued shall be subject to the Purchase Option; 
  
 (ii) redeem, repurchase or otherwise acquire, directly or
indirectly, any Symphony Evolution Equity Securities or the Equity Securities of any Subsidiary of Symphony Evolution; 
  
 (iii) create, incur, assume or permit to exist any Debt other than any Debt incurred pursuant to the Operative Documents and the
Development Budget (“Excepted Debt”); provided, however, that the aggregate outstanding principal amount of all such Excepted Debt for borrowed money shall not exceed $1,000,000 at any time; 
  
 (iv) other than any dividend declared from the proceeds of
the exercise of the Program Option, the exercise of the Discontinuation Option or the sale of a discontinued or abandoned Program to GlaxoSmithKline or other third party, in respect of which Symphony Evolution shall be entitled to pay a dividend
equal to the net amount (such net amount calculated as the gross proceeds received less amounts required to be paid in respect of any and all corporate taxes owed by Symphony Evolution as a result of the receipt of such gross amounts) of such
Program Option Exercise Price, Discontinuation Price or the amount received from such third party, as the case may be, declare or pay dividends or other distributions on any Symphony Evolution Equity Securities; 
  
 (v) enter into any transaction of merger or consolidation,
or liquidate, wind up or dissolve itself, or convey, transfer, license, lease or otherwise dispose of all, or a material portion of, its properties, assets or business; 
  
 (vi) other than in respect of the Programs, engage in the development of pharmaceutical products for any
other company or engage or participate in the development of pharmaceutical products or engage in any other material line of business; 
  
 (vii) other than entering into, and performing its obligations under, the Operative Documents and participating in the Programs, engage in
any action that negates or is inconsistent with any rights of Exelixis set forth herein; 
  
 (viii) other than as contemplated by the Management Services Agreement and Section 6.3 of the Amended and Restated Research and
Development Agreement, hire, retain or contract for the services of, any employees until the termination of such agreements; 
  
 (ix) incur any financial commitments in respect of the development of the Programs other than those set forth in the Development Plan and
the Development Budget, or those approved by the Development Committee and, if so required by the terms of Paragraph 11 of the Development Committee Charter, the Symphony Evolution Board in accordance with the Operative Documents; 
  

 20 
  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 (x) other than any transaction contemplated by the Operative Documents, enter into or
engage in any Conflict Transactions without the prior approval of a majority of the Disinterested Directors of the Symphony Evolution Board; or 
  
 (xi) waive, alter, modify, amend or supplement in any manner whatsoever any material terms and conditions of the Management Services
Agreement, the Funding Agreement, the Subscription Agreement, or Articles 4 and 6 of the Amended and Restated Research and Development Agreement, except in compliance with the terms of the Operative Documents. 
  
 (d) Symphony Evolution covenants and agrees to deliver, cause to be
delivered, and provide access thereto, to each other Party, each Symphony Fund, and such auditors as Exelixis may designate, so long as such auditors shall be subject to confidentiality requirements at least as stringent as the Confidentiality
Agreement (the “Exelixis Auditors”): 
  
 (i) copies of the then current Development Plan for each quarter, on or before March 31, June 30, September 30, and December 31 of each year; 
  
 (ii) copies of the then current Development Budget for each quarter, including a report setting forth in
reasonable detail the projected expenditures by Symphony Evolution pursuant to the Development Budget, on or before March 31, June 30, September 30, and December 31 of each year; 
  
 (iii) within forty-five (45) days after the close of each fiscal year, the financial information, provided
upon the Manager’s completion of Symphony Evolution’s audit procedures, reasonably necessary for Exelixis to consolidate the financial results of Symphony Evolution; 
  
 (iv) within sixty (60) days after the close of each fiscal year, the following financial statements, audited
and certified by the Auditors: (A) a balance sheet of Symphony Evolution as of the close of such fiscal year; (B) a statement of net income for such fiscal year, and (C) a statement of cash flows for such fiscal year. Such audited annual financial
statements shall set forth in comparative form the figures for the previous fiscal year, all in reasonable detail, prepared in accordance with GAAP, and accompanied by an opinion thereon of the Auditors, which opinion shall state that such financial
statements present fairly, in all material respects, the financial position of Symphony Evolution and its results of operations and cash flows and have been prepared in conformity with GAAP, and that the examination of such accountants in connection
with such financial statements has been made in accordance with generally accepted auditing standards, and that such audit provides a reasonable basis for such opinion in the circumstances; 
  
 (v) within twenty five (25) days following each calendar
month: (A) the unaudited balance sheet of Symphony Evolution for the previous calendar month; (B) the unaudited statement of net income for such previous calendar month; and (C) the unaudited statement of cash flows for such previous calendar month;

  

 21 
  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 (vi) any other documents, materials or other information pertaining to the Programs or
Symphony Evolution as Exelixis may reasonably request, including preliminary financial information; 
  
 (vii) promptly on or prior to the due date for filing thereof, a copy of each material income tax return filed by Symphony Evolution with
any foreign, federal, state or local taxing authority; 
  
 (viii) promptly, and in any event within 10 days of receipt thereof, copies of any notice to Symphony Evolution from any federal or state Governmental Authority relating to any order, ruling, statute or other law or regulation that would
reasonably be expected to have a Material Adverse Effect on Symphony Evolution; 
  
 (ix) promptly upon receipt thereof, notice of all actions, suits, investigations, litigation and proceedings before any court or
governmental department, commission, board, bureau, agency or instrumentality, domestic or foreign, affecting Symphony Evolution; 
  
 (x) promptly upon receipt thereof, copies of any other notices, requests, reports, financial statements and other information and
documents received by Symphony Evolution under or pursuant to any other Operative Document; and 
  
 (xi) with reasonable promptness, such other data and information relating to the business, operations, affairs, financial condition,
assets or properties of Symphony Evolution or relating to the ability of Symphony Evolution to perform its obligations hereunder and under the Operative Documents as from time to time may be reasonably requested by Exelixis and/or Holdings;

  
 provided, that neither Symphony Evolution, nor the Manager acting on
behalf of Symphony Evolution, shall have any liability to Exelixis for the failure to deliver financial documents or other materials hereunder, if such failure was caused by a failure of Exelixis, in its role as Servicer, to provide, in a timely
manner, data required to prepare such financial documents or other materials to Symphony Exelixis in a timely manner. 
  
 (e) Symphony Evolution will use commercially reasonable efforts, at its own expense (as set forth in the Management Budget), to cooperate with Exelixis in
meeting Exelixis’ government compliance, disclosure, and financial reporting obligations, including without limitation under the Sarbanes-Oxley Act of 2002 and any rules and regulations promulgated thereunder, and under FASB Interpretation No.
46. Without limiting the foregoing, Symphony Evolution further covenants, until the expiration of the Term, that (w) the principal executive officer and the principal financial officer of Symphony Evolution, or persons performing
similar functions, shall provide certifications to Exelixis substantially similar to those required with respect to public companies for which a class of securities is registered under the Securities Exchange Act of 1934, as amended (the
“Exchange Act”) (“Public Companies”) under Sections 

  

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IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 
302 and 906 of the Sarbanes-Oxley Act of 2002; (x) Symphony Evolution shall maintain a system of disclosure controls and internal controls (as defined under
the Exchange Act) and conduct quarterly and annual evaluations of the effectiveness of such controls as required under the Exchange Act for Public Companies; (y) Symphony Evolution shall provide to Exelixis an attestation report of its Auditors with
respect to Symphony Evolution management’s assessment of Symphony Evolution’s internal controls as required under the Exchange Act for Public Companies; and (z) Symphony Evolution will maintain, or cause to have maintained, such sufficient
evidentiary support for management’s assessment of the effectiveness of Symphony Evolution’s internal controls as required under the Exchange Act for Public Companies. 
  
 Section 6. Notice of Material Event. Each Party agrees that, upon it receiving knowledge of a material event or
development with respect to any of the transactions contemplated hereby that, to the knowledge of its executive officers, is not known to the other Parties, such Party shall notify the other Parties in writing within three (3) Business Days of the
receipt of such knowledge by any executive officer of such Party; provided, that the failure to provide such notice shall not impair or otherwise be deemed a waiver of any rights any Party may have arising from such material event or
development and that notice under this Section 6 shall not in itself constitute notice of any breach of any of the Operative Documents. 
  
 Section 7. Assignment, Transfers and Legend. 
  
 (a) Assignment by Exelixis and Symphony Evolution. Neither Exelixis nor Symphony Evolution may assign, delegate, transfer, sell or otherwise
dispose of (collectively, “Transfer”), in whole or in part, any or all of their rights or obligations hereunder to any Person (a “Transferee”) without the prior written approval of each of the other
Parties; provided, however, that Exelixis, without the prior approval of each of the other Parties, acting in accordance with Article 14 of the Amended and Restated Research and Development Agreement, may make such Transfer to any
Person which acquires all or substantially all of Exelixis’ assets or business (or assets or business related to the Programs) or which is the surviving or resulting Person in a merger or consolidation with Exelixis; provided
further, that in the event of any Transfer, Exelixis or Symphony Evolution, as applicable, shall provide written notice to the other Parties of any such Transfer not later than thirty (30) days after such Transfer setting forth the identity
and address of the Transferee and summarizing the terms of the Transfer. In no event shall such assignment alter the definition of “Exelixis Common Stock” except as a result of the surviving or resulting “parent” entity in a
merger being other than Exelixis, in which case any reference to Exelixis Common Stock shall be deemed to instead reference the common stock, if any, of the surviving or resulting entity. 
  
 (b) Assignment and Transfers by Holdings. Prior to the expiration of the Purchase Option, Holdings may not Transfer,
in whole or in part, any or all of its Symphony Evolution Equity Securities or any or all of its rights or obligations hereunder to any Person without the prior written consent of Exelixis. In addition, any Transfer of Symphony Evolution Equity
Securities by Holdings or any other Person shall be conditioned upon, and no effect shall be given to any such Transfer unless such transferee shall agree in writing in form and substance satisfactory to Exelixis to be bound by all of the terms and
conditions hereunder, including the Purchase Option, as if such transferee were originally designated as “Holdings” hereunder. 
  

 23 
  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 (c) Legend. Any certificates evidencing Symphony Evolution Equity Securities shall bear a legend
in substantially the following form: 
  
 THE SECURITIES OF
SYMPHONY EVOLUTION, INC., EVIDENCED HEREBY ARE SUBJECT TO AN OPTION, HELD BY EXELIXIS, INC., AS DESCRIBED IN A PURCHASE OPTION AGREEMENT (THE “PURCHASE OPTION AGREEMENT”) DATED AS OF JUNE 9, 2005 BY AND AMONG EXELIXIS, INC. AND THE
OTHER PARTIES THERETO, TO PURCHASE SUCH SECURITIES AT A PURCHASE PRICE DETERMINED PURSUANT TO SECTION 2 OF THE PURCHASE OPTION AGREEMENT, EXERCISABLE BY WRITTEN NOTICE AT ANY TIME DURING THE PERIOD SET FORTH THEREIN. COPIES OF THE PURCHASE OPTION
AGREEMENT ARE AVAILABLE AT THE PRINCIPAL PLACE OF BUSINESS OF SYMPHONY EVOLUTION, INC. AT 7361 CALHOUN PLACE, SUITE 325, ROCKVILLE, MARYLAND 20855, AND WILL BE FURNISHED TO THE HOLDER HEREOF UPON WRITTEN REQUEST WITHOUT COST. 
  
 Section 8. Costs and Expenses; Payments. 
  
 (a) Symphony Evolution Costs and Expenses. Symphony Evolution shall
pay any of its ongoing legal expenses with respect to the transactions described in the Operative Documents from the funds allocated for such purpose in the Management Budget. 
  
 (b) Costs and Expenses of the Purchase Option. Except as otherwise specified in Section 2(g) hereof, each
Party shall pay its own costs and expenses incurred in connection with the exercise of the Purchase Option. 
  
 (c) Payments to Holdings. Payment of the Purchase Price, plus any costs and expenses payable by Symphony Evolution under Section 2(g)
hereof, shall be made to the account of Holdings contemporaneously with or prior to the payout of the Purchase Price on the Purchase Option Closing Date no later than 1:00 pm (New York time). 
  
 Section 9. Termination of Agreement. 
  
 (a) This Agreement shall terminate upon the mutual written consent of all of
the Parties. 
  
 (b) Each of Holdings and Symphony Evolution may
terminate this Agreement in the event that Symphony Evolution terminates the Amended and Restated Research and Development Agreement in accordance with its terms. 
  
 Section 10. Survival; Indemnification. 
  
 (a) Survival of Representations and Warranties; Expiration of Certain Covenants. 
  
 (i) The representations and warranties of the Parties
contained in this Agreement shall survive for a period of one year from the making of such 

  

 24 
  

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IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 
representations. The liability of the Parties related to their respective representations and warranties hereunder shall not be reduced by any investigation
made at any time by or on behalf of Holdings, Symphony Evolution or Exelixis, as applicable. 
  
 (ii) For the avoidance of doubt, the covenants and agreements set forth in Sections 4(b), 5(b), 5(c), 5(d) and
5(e) shall, upon the expiration of the Term, expire and end without any further obligation by Symphony Evolution or Holdings thereunder. 
  
 (b) Indemnification. To the greatest extent permitted by applicable law, Exelixis shall indemnify and hold harmless Holdings and Symphony Evolution
and Holdings shall indemnify and hold harmless Exelixis, and each of their respective Affiliates, officers, directors, employees, agents, partners, members, successors, assigns, representatives of, and each Person, if any (including any officers,
directors, employees, agents, partners, members of such Person) who controls Holdings, Symphony Evolution and Exelixis, as applicable, within the meaning of the Securities Act or the Exchange Act, (each, an “Indemnified
Party”), from and against any and all actions, causes of action, suits, claims, losses, diminution in value, costs, interest, penalties, fees, liabilities and damages, and expenses in connection therewith (irrespective of whether any
such Indemnified Party is a party to the action for which indemnification hereunder is sought), and including reasonable attorneys’ fees and disbursements (hereinafter, a “Loss”), incurred by any Indemnified Party as a
result of, or arising out of, or relating to: (i) in the case of Exelixis being the Indemnifying Party, (A) any breach of any representation or warranty made by Exelixis herein or in any certificate, instrument or document delivered hereunder, or
(B) any breach of any covenant, agreement or obligation of Exelixis contained herein or in any certificate, instrument or document delivered hereunder, and (ii) in the case of Holdings being the Indemnifying Party, (A) any breach of any
representation or warranty made by Holdings or Symphony Evolution herein or in any certificate, instrument or document delivered hereunder, or (B) any breach of any covenant, agreement or obligation of Holdings or Symphony Evolution contained herein
or in any certificate, instrument or document delivered hereunder. To the extent that the foregoing undertaking by Exelixis or Holdings may be unenforceable for any reason, such Party shall make the maximum contribution to the payment and
satisfaction of any Loss that is permissible under applicable law. 
  
 (c) Notice of Claims. Any Indemnified Party that proposes to assert a right to be indemnified under this Section 10 shall notify Exelixis or Holdings, as applicable (the “Indemnifying Party”), promptly
after receipt of notice of commencement of any action, suit or proceeding against such Indemnified Party (an “Indemnified Proceeding”) in respect of which a claim is to be made under this Section 10, or the incurrence
or realization of any Loss in respect of which a claim is to be made under this Section 10, of the commencement of such Indemnified Proceeding or of such incurrence or realization, enclosing a copy of all relevant documents, including all
papers served and claims made, but the omission to so notify the applicable Indemnifying Party promptly of any such Indemnified Proceeding or incurrence or realization shall not relieve (x) such Indemnifying Party from any liability that it may have
to such Indemnified Party under this Section 10 or otherwise, except, as to such Indemnifying Party’s liability under this Section 10, to the extent, but only to the extent, that such Indemnifying Party shall have been prejudiced
by such omission, or (y) any other indemnitor from liability that it may have to any Indemnified Party under the Operative Documents. 
  

 25 
  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 (d) Defense of Proceedings. In case any Indemnified Proceeding shall be brought against any
Indemnified Party, it shall notify the applicable Indemnifying Party of the commencement thereof as provided in Section 10(c), and such Indemnifying Party shall be entitled to participate in, and provided such Indemnified Proceeding involves
a claim solely for money damages and does not seek an injunction or other equitable relief against the Indemnified Party and is not a criminal or regulatory action, to assume the defense of, such Indemnified Proceeding with counsel reasonably
satisfactory to such Indemnified Party, and after notice from such Indemnifying Party to such Indemnified Party of such Indemnifying Party’s election so to assume the defense thereof and the failure by such Indemnified Party to object to such
counsel within ten (10) Business Days following its receipt of such notice, such Indemnifying Party shall not be liable to such Indemnified Party for legal or other expenses related to such Indemnified Proceedings incurred after such notice of
election to assume such defense except as provided below and except for the reasonable costs of investigating, monitoring or cooperating in such defense subsequently incurred by such Indemnified Party reasonably necessary in connection with the
defense thereof. Such Indemnified Party shall have the right to employ its counsel in any such Indemnified Proceeding, but the fees and expenses of such counsel shall be at the expense of such Indemnified Party unless: 
  
 (i) the employment of counsel by such Indemnified Party at
the expense of the applicable Indemnifying Party has been authorized in writing by such Indemnifying Party; 
  
 (ii) such Indemnified Party shall have reasonably concluded in its good faith (which conclusion shall be determinative unless a court
determines that such conclusion was not reached reasonably and in good faith) that there is or may be a conflict of interest between the applicable Indemnifying Party and such Indemnified Party in the conduct of the defense of such Indemnified
Proceeding or that there are or may be one or more different or additional defenses, claims, counterclaims, or causes of action available to such Indemnified Party (it being agreed that in any case referred to in this clause (ii) such Indemnifying
Party shall not have the right to direct the defense of such Indemnified Proceeding on behalf of the Indemnified Party); 
  
 (iii) the applicable Indemnifying Party shall not have employed counsel reasonably acceptable to the Indemnified Party, to assume the
defense of such Indemnified Proceeding within a reasonable time after notice of the commencement thereof (provided, however, that this clause shall not be deemed to constitute a waiver of any conflict of interest that may arise with
respect to any such counsel); or 
  
 (iv) any
counsel employed by the applicable Indemnifying Party shall fail to timely commence or diligently conduct the defense of such Indemnified Proceeding; 
  
 in each of which cases the fees and expenses of counsel for such Indemnified Party shall be at the expense of such Indemnifying Party. Only one counsel shall be retained
by all Indemnified Parties with respect to any Indemnified Proceeding, unless counsel for any Indemnified Party reasonably concludes in good faith (which conclusion shall be determinative unless a court determines that such conclusion was not
reached reasonably and in good faith) that there is or may be a conflict of interest between such Indemnified Party and one or more other Indemnified 
  

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IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 
Parties in the conduct of the defense of such Indemnified Proceeding or that there are or may be one or more different or additional defenses, claims,
counterclaims, or causes or action available to such Indemnified Party. 
  
 (e) Settlement. Without the prior written consent of such Indemnified Party, such Indemnifying Party shall not settle or compromise, or consent to the entry of any judgment in, any pending or threatened Indemnified Proceeding, unless
such settlement, compromise, consent or related judgment (i) includes an unconditional release of such Indemnified Party from all liability for Losses arising out of such claim, action, investigation, suit or other legal proceeding, (ii) provides
for the payment of money damages as the sole relief for the claimant (whether at law or in equity), (iii) involves no finding or admission of any violation of law or the rights of any Person by the Indemnified Party, and (iv) is not in the nature of
a criminal or regulatory action. No Indemnified Party shall settle or compromise, or consent to the entry of any judgment in, any pending or threatened Indemnified Proceeding in respect of which any payment would result hereunder or under the
Operative Documents without the prior written consent of the Indemnifying Party, such consent not to be unreasonably conditioned, withheld or delayed. 
  
 Section 11. No Petition. Each of Exelixis and Holdings covenants and agrees that, prior to the date which is one year and one day after the
expiration of the Purchase Option Period, it will not institute or join in the institution of any bankruptcy, insolvency, reorganization or similar proceeding against Symphony Evolution. The provisions of this Section 11 shall survive the
termination of this Agreement. 
  
 Section 12. Third-Party
Beneficiary. Each of the Parties agrees that each Symphony Fund shall be a third-party beneficiary of this Agreement. 
  
 Section 13. Notices. Any notice, request, demand, waiver, consent, approval or other communication which is required or permitted to be given to
any Party shall be in writing and shall be deemed given only if delivered to the Party personally or sent to the Party by facsimile transmission (promptly followed by a hard-copy delivered in accordance with this Section 13), by next Business
Day delivery by a nationally recognized courier service, or by registered or certified mail (return receipt requested), with postage and registration or certification fees thereon prepaid, addressed to the Party at its address set forth below:

  
 Exelixis: 
  
 Exelixis, Inc. 
 170 Harbor Way 
 South San Francisco, CA 94083 
 Attention: Corporate Secretary 
 Facsimile: (650) 837-7951 
  

 27 
  

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IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 Symphony Evolution: 
  
 Symphony Evolution, Inc. 
 7361 Calhoun Place, Suite 325 
 Rockville, MD 20850 
 Attn: Charles W. Finn, Ph.D. 
 Facsimile: (301) 762-6154 
  
 Holdings: 
  
 Symphony Evolution Holdings LLC 
 7361 Calhoun Place, Suite 325 
 Rockville, MD 20850 
 Attn: Joseph P. Clancy 
 Facsimile: (301) 762-6154 
  
 with
copies to: 
  
 Symphony Capital Partners, L.P.

 875 Third Avenue 
 18th Floor 
 Attn: Mark Kessel 
 New York, NY 10022 
 Facsimile: (212) 632-5401 
  
 and 
  
 Symphony Strategic Partners, LLC 
 875 Third Avenue 
 18th Floor 
 New York, NY 10022

 Attn: Mark Kessel 
 Facsimile: (212) 632-5401 
  
 or to such other
address as such Party may from time to time specify by notice given in the manner provided herein to each other Party entitled to receive notice hereunder. 
  
 Section 14. Governing Law; Consent to Jurisdiction and Service of Process. 
  
 (a) This Agreement shall be governed by, and construed in accordance with, the laws of the State of New York; except to the
extent that this Agreement pertains to the internal governance of Symphony Evolution or Holdings, and to such extent this Agreement shall be governed and construed in accordance with the laws of the State of Delaware. 
  
 (b) Each of the Parties hereby irrevocably and unconditionally submits, for
itself and its property, to the nonexclusive jurisdiction of any New York State court and Delaware State court or federal court of the United States of America sitting in The City of New York, Borough of Manhattan or Wilmington, Delaware, and any
appellate court from any jurisdiction 

  

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IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 
thereof, in any action or proceeding arising out of or relating to this Agreement, or for recognition or enforcement of any judgment, and each of the Parties
hereby irrevocably and unconditionally agrees that all claims in respect of any such action or proceeding may be heard and determined in any such New York State court, any such Delaware State court or, to the fullest extent permitted by law, in such
federal court. Each of the Parties agrees that a final judgment in any such action or proceeding shall be conclusive and may be enforced in other jurisdictions by suit on the judgment or in any other manner provided by law. Nothing in this Agreement
shall affect any right that any Party may otherwise have to bring any action or proceeding relating to this Agreement. 
  
 (c) Each of the Parties irrevocably and unconditionally waives, to the fullest extent it may legally and effectively do so, any objection that it may now
or hereafter have to the laying of venue of any suit, action or proceeding arising out of or relating to this Agreement in any New York State or federal court, or any Delaware State or federal court. Each of the Parties hereby irrevocably waives, to
the fullest extent permitted by law, the defense of an inconvenient forum to the maintenance of such action or proceeding in any such court. Each of the parties hereby consents to service of process by mail. 
  
 Section 15. Waiver of Jury Trial. EACH OF THE PARTIES HERETO
IRREVOCABLY WAIVES ALL RIGHT TO TRIAL BY JURY IN ANY ACTION, PROCEEDING OR COUNTERCLAIM (WHETHER BASED ON CONTRACT, TORT OR OTHERWISE) ARISING OUT OF OR RELATING TO THIS AGREEMENT. 
  
 Section 16. Entire Agreement. This Agreement (including any Annexes, Schedules, Exhibits or other attachments hereto)
constitutes the entire agreement between the Parties with respect to the matters covered hereby and supersedes all prior agreements and understanding with respect to such matters between the Parties. 
  
 Section 17. Amendment; Successors; Counterparts. 
  
 (a) The terms of this Agreement shall not be altered, modified, amended,
waived or supplemented in any manner whatsoever except by a written instrument signed by each of the Parties. 
  
 (b) Except as set forth in Section 12, nothing expressed or implied herein is intended or shall be construed to confer upon or to give to any
Person, other than the Parties, any right, remedy or claim under or by reason of this Agreement or of any term, covenant or condition hereof, and all the terms, covenants, conditions, promises and agreements contained herein shall be for the sole
and exclusive benefit of the Parties and their successors and permitted assigns. 
  
 (c) This Agreement may be executed in one or more counterparts, each of which, when executed, shall be deemed an original but all of which, taken together, shall constitute one and the same Agreement. 
  
 Section 18. Specific Performance. The Parties acknowledge that
irreparable damage would result if this Agreement were not specifically enforced, and they therefore agree 

  

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IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 
that the rights and obligations of the Parties under this Agreement may be enforced by a decree of specific performance issued by a court of competent
jurisdiction. Such a remedy shall, however, not be exclusive, and shall be in addition to any other remedies which any Party may have under this Agreement or otherwise. The Parties further acknowledge and agree that a decree of specific performance
may not be an available remedy in all circumstances. 
  
 Section
19. Severability. If any term or other provision of this Agreement is invalid, illegal or incapable of being enforced by any rule of law or public policy, all other conditions and provisions of this Agreement shall nevertheless remain in full
force and effect so long as the economic or legal substance of the transactions contemplated hereby is not affected in a manner materially adverse to either party. Upon such determination that any term or other provision is invalid, illegal or
incapable of being enforced, the parties hereto shall negotiate in good faith to modify this Agreement so as to effect the original intent of the parties as closely as possible in an acceptable manner to the end that the transactions contemplated
hereby are fulfilled to the extent possible. 
  
 Section 20.
Tax Reporting. The Parties acknowledge and agree that, for all federal and state income tax purposes, 
  
 (a) (i) Holdings shall be treated as the owner of all the Equity Securities of Symphony Evolution; (ii) the Purchase Option shall be treated as an option
to acquire all the Equity Securities of Symphony Evolution; (iii) the Warrants shall be treated as option premium payable in respect of the grant of the Purchase Option; and (iv) Symphony Evolution shall be treated as the owner of all the Licensed
Intellectual Property and shall be entitled to all deductions claimed under Section 174 of the Code in respect of the Licensed Intellectual Property to the extent of the amounts funded by Symphony Evolution; and 
  
 (b) no Party shall take any tax position inconsistent with any position
described in Section 20(a) above, except (i) in the event of a “determination” (as defined in Section 1313 of the Code) to the contrary, or (ii) in the event either of the Parties receives an opinion of counsel to the effect that
there is no reasonable basis in law for such a position or that a tax return cannot be prepared based on such a position without being subject to substantial understatement penalties; provided, however, that in the event of Exelixis,
such counsel shall be reasonably satisfactory to Holdings. 
  
 {SIGNATURES FOLLOW ON NEXT PAGE} 
  

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IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 IN WITNESS WHEREOF, the parties hereto have signed this Agreement as of the day and year first
above written. 
  

					
	         
 EXELIXIS, INC.

		
	 By:
	 	 /s/ Christoph Pereira

	 	 	 Name:
	 	 Christoph Pereira

	 	 	 Title:
	 	 Vice President, Legal Affairs and Secretary

  

			
	         
     
 SYMPHONY EVOLUTION HOLDINGS LLC

		
	 By:
	 	 Symphony Capital Partners, L.P.,

	 	 	 its managing member

		
	 By:
	 	 Symphony Capital GP, L.P.,

	 	 	 its general partner

		
	 By:
	 	 Symphony GP, LLC,

	 	 	 its general partner

  

					
	 By:
	 	 /s/ Mark Kessel

	 	 	 Name:
	 	 Mark Kessel

	 	 	 Title:
	 	 Managing Member

	
	         
     
 SYMPHONY EVOLUTION, INC.

		
	 By:
	 	 /s/ Harri V. Taranto

	 	 	 Name:
	 	 Harri V. Taranto

	 	 	 Title:
	 	 Chairman of the Board

  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 Schedule I 
  

Purchase Price Calculation Example 
  
 [ * ] 
  

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IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 Annex A 
  
 Certain Definitions 
  
 “$” means United States dollars. 
  
 “Accredited Investor” has the meaning set forth in Rule 501(a) of Regulation D promulgated under the Securities Act of 1933, as
amended. 
  
 “Act” means the Delaware
Limited Liability Company Act, 6 Del. C. § 18-101 et seq. 
  
 “Additional Funds” has the meaning set forth in Section 2(b) of the Funding Agreement. 
  
 “Additional Funding Date” has the meaning set forth in Section 3 of the Funding Agreement. 
  
 “Additional Party” has the meaning set forth in
Section 12 of the Confidentiality Agreement. 
  
 “Additional Regulatory Filings” means such Governmental Approvals as required to be made under any law applicable to the purchase of the Symphony Evolution Equity Securities under the Agreement. 
  
 “Ad Hoc Meeting” has the meaning set forth in
Paragraph 6 of Annex B to the Amended and Restated Research and Development Agreement. 
  
 “Adjusted Capital Account Deficit” has the meaning set forth in Section 1.01 of the Holdings LLC Agreement. 
  
 “Affected Member” has the meaning set forth in Section 27 of the Investors LLC Agreement.

  
 “Affiliate” means, with respect to any
Person (i) any Person directly or indirectly controlling, controlled by or under common control with such Person, (ii) any officer, director, general partner, member or trustee of such Person, or (iii) any Person who is an officer, director, general
partner, member or trustee of any Person described in clauses (i) or (ii) of this sentence. For purposes of this definition, the terms “controlling,” “controlled by” or “under common control with” shall mean the
possession, direct or indirect, of the power to direct or cause the direction of the management and policies of a Person or entity, whether through the ownership of voting securities, by contract or otherwise, or the power to elect at least 50% of
the directors, managers, general partners, or persons exercising similar authority with respect to such Person or entities. 
  
 “Amended and Restated Research and Development Agreement” means the Amended and Restated Research and Development Agreement dated
as of June 9, 2005, among Exelixis, Holdings and Symphony Evolution. 
  

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IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 “Asset Value” has the meaning set forth in Section 1.01 of the Holdings LLC
Agreement. 
  
 “Auditors” means an
independent certified public accounting firm of recognized national standing. 
  
 “A Warrant Date” has the meaning set forth in Section 2.04 of the Warrant Purchase Agreement. 
  
 “A Warrants” has the meaning set forth in Section 2.01 of the Warrant Purchase Agreement. 
  
 “A Warrant Shares” has the meaning set forth in
Section 2.01 of the Warrant Purchase Agreement. 
  
 “Bankruptcy Code” means the United States Bankruptcy Code. 
  
 “Bloomberg” means Bloomberg L.P., a multimedia based distributor of information services, including data and analysis for financial markets and businesses. 
  
 “Bloomberg Screen” means the display page designated
on the Bloomberg service (or such other page as may replace that page on that service) for the purpose of displaying prices or bids of Exelixis Common Stock. 
  
 “Business Day” means any day other than Saturday, Sunday or any other day on which commercial banks in The City of New York or the
City of San Francisco are authorized or required by law to remain closed. 
  
 “B Warrants” has the meaning set forth in Section 2.02 of the Warrant Purchase Agreement. 
  
 “B Warrant Date” has the meaning set forth in Section 2.02 of the Warrant Purchase Agreement. 
  
 “B Warrant Shares” has the meaning set forth in
Section 2.05 of the Warrant Purchase Agreement. 
  
 “Capital Contributions” has the meaning set forth in Section 1.01 of the Holdings LLC Agreement. 
  
 “Capitalized Leases” means all leases that have been or should be, in accordance with GAAP, recorded as capitalized leases.

  
 “Cash Available for Distribution” has
the meaning set forth in Section 1.01 of the Holdings LLC Agreement. 
  
 “Chair” has the meaning set forth in Paragraph 4 of Annex B to the Amended and Restated Research and Development Agreement. 
  

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IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 “Change of Control” means and includes the occurrence of any of the following
events, but specifically excludes (i) acquisitions of capital stock directly from Exelixis for cash, whether in a public or private offering, (ii) sales of capital stock by stockholders of Exelixis, and (iii) acquisitions of capital stock by or from
any employee benefit plan or related trust: 
  
 (a) the merger, reorganization or consolidation of Exelixis into or with another corporation or legal entity in which Exelixis’ stockholders holding the right to vote with respect to matters generally immediately preceding such merger,
reorganization or consolidation, own less than fifty percent (50%) of the voting securities of the surviving entity; or 
  
 (b) the sale of all or substantially all of Exelixis’ assets or business. 
  
 “Class A Member” means a holder of a Class A
Membership Interest. 
  
 “Class A Membership
Interest” means a Class A Membership Interest in Holdings. 
  
 “Class B Member” means a holder of a Class B Membership Interest. 
  
 “Class B Membership Interest” means a Class B Membership Interest in Holdings. 
  
 “Class C Member” means a holder of a Class C
Membership Interest. 
  
 “Class C Membership
Interest” means a Class C Membership Interest in Holdings. 
  
 “Class D Member” means a holder of a Class D Membership Interest. 
  
 “Class D Membership Interest” means a Class D Membership Interest in Holdings. 
  
 “Clinical Budget” has the meaning set forth in
Section 4.1 of the Amended and Restated Research and Development Agreement. 
  
 “Clinical Plan” has the meaning set forth in Section 4.1 of the Amended and Restated Research and Development Agreement. 
  
 “Closing Date” means June 9, 2005. 
  
 “CMC” means the chemistry, manufacturing and controls documentation as required for filings with
Regulatory Authority relating to the manufacturing, production and testing of drug products. 
  
 “Code” means the Internal Revenue Code of 1986, as amended from time to time. 
  
 “Committed Capital” means $80,000,000.00. 
  

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IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 “Common Stock” means the common stock, par value $0.01 per share, of Symphony
Evolution. 
  
 “Company Expenses” has the
meaning set forth in Section 5.09 of the Holdings LLC Agreement. 
  
 “Company Property” has the meaning set forth in Section 1.01 of the Holdings LLC Agreement. 
  
 “Confidential Information” has the meaning set forth in Section 2 of the Confidentiality Agreement. 
  
 “Confidentiality Agreement” means the Confidentiality
Agreement, dated as of June 9, 2005, among Symphony Evolution, Holdings, Exelixis, each Symphony Fund, SCP, SSP, Investors, Symphony Capital, RRD and Daniel F. Hoth, M.D., Herbert J. Conrad, and Alastair J.J. Wood, M.D. 
  
 “Conflict Transaction” has the meaning set forth in
Article IX of the Symphony Evolution Charter. 
  
 “Control” means, with respect to any material, information or intellectual property right, that a Party owns or has a license to such item or right, and has the ability to grant the other Party access, a license or a
sublicense (as applicable) in or to such item or right as provided in the Operative Documents without violating the terms of any agreement or other arrangement with any third party. 
  
 “C Warrants” has the meaning set forth in Section 2.03 of the Warrant Purchase Agreement.

  
 “C Warrant Date” has the meaning set
forth in Section 2.06 of the Warrant Purchase Agreement. 
  
 “C Warrant Shares” has the meaning set forth in Section 2.03 of the Warrant Purchase Agreement. 
  
 “Debt” of any Person means, without duplication: 
  
 (a) all indebtedness of such Person for borrowed money, 
  
 (b) all obligations of such Person for the deferred purchase
price of property or services (other than any portion of any trade payable obligation that shall not have remained unpaid for 91 days or more from the later of (A) the original due date of such portion and (B) the customary payment date in the
industry and relevant market for such portion), 
  
 (c) all obligations of such Person evidenced by bonds, notes, debentures or other similar instruments, 
  

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IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 (d) all obligations of such Person created or arising under any conditional sale or other
title retention agreement with respect to property acquired by such Person (whether or not the rights and remedies of the seller or lender under such agreement in an event of default are limited to repossession or sale of such property), 

 
 (e) all Capitalized Leases to which such Person is a
party, 
  
 (f) all obligations, contingent or
otherwise, of such Person under acceptance, letter of credit or similar facilities, 
  
 (g) all obligations of such Person to purchase, redeem, retire, defease or otherwise acquire for value any Equity Securities of such
Person, 
  
 (h) the net amount of all financial
obligations of such Person in respect of Hedge Agreements, 
  
 (i) the net amount of all other financial obligations of such Person under any contract or other agreement to which such Person is a party, 
  
 (j) all Debt of other Persons of the type described in clauses (a) through (i) above guaranteed, directly or
indirectly, in any manner by such Person, or in effect guaranteed, directly or indirectly, by such Person through an agreement (A) to pay or purchase such Debt or to advance or supply funds for the payment or purchase of such Debt, (B) to purchase,
sell or lease (as lessee or lessor) property, or to purchase or sell services, primarily for the purpose of enabling the debtor to make payment of such Debt or to assure the holder of such Debt against loss, (C) to supply funds to or in any other
manner invest in the debtor (including any agreement to pay for property or services irrespective of whether such property is received or such services are rendered) or (D) otherwise to assure a creditor against loss, and 
  
 (k) all Debt of the type described in clauses (a) through
(i) above secured by (or for which the holder of such Debt has an existing right, contingent or otherwise, to be secured by) any Encumbrance on property (including accounts and contract rights) owned or held or used under lease or license by such
Person, even though such Person has not assumed or become liable for payment of such Debt. 
  
 “Development Budget” means the budget for the implementation of the Development Plan that is agreed upon by Exelixis and Symphony Evolution as of the Effective Date, as may be revised from time
to time in accordance with the Development Committee Charter and the Amended and Restated Research and Development Agreement. 
  
 “Development Committee” has the meaning set forth in Article 3 of the Amended and Restated Research and Development Agreement.

  
 “Development Committee Charter” has
the meaning set forth in Article 3 of the Amended and Restated Research and Development Agreement. 
  

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IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 “Development Committee Member” has the meaning set forth in Paragraph 1 of Annex
B to the Amended and Restated Research and Development Agreement. 
  
 “Development Plan” means the development plan, covering all the Programs, agreed to by Exelixis and Symphony Evolution as of the Effective Date, as may be revised from time to time in accordance with the Development
Committee Charter and the Amended and Restated Research and Development Agreement. 
  
 “Directors” has the meaning set forth in the Preliminary Statement of the Indemnification Agreement. 
  
 “Disclosing Party” has the meaning set forth in Section 3 of the Confidentiality Agreement. 
  
 “Discontinuation Closing Date” means the date of
Symphony’s receipt of the Discontinuation Price. 
  
 “Discontinuation Option” has the meaning set forth in Section 11.2(a) of the Amended and Restated Research and Development Agreement. 
  
 “Discontinuation Price” has the meaning set forth in Section 11.2(a) of the Amended and Restated
Research and Development Agreement. 
  
 “Discontinued
Program” has the meaning set forth in Section 2.10 of the Novated and Restated Technology License Agreement. 
  
 “Disinterested Directors” has the meaning set forth in Article IX of the Symphony Evolution Charter. 
  
 “Distribution” has the meaning set forth in Section
1.01 of the Holdings LLC Agreement. 
  
 “Effective
Date” has the meaning set forth in the Novated and Restated Technology License Agreement. 
  
 “Effective Registration Date” has the meaning set forth in the Registration Rights Agreement. 
  
 “Encumbrance” means (i) any security interest,
pledge, mortgage, lien (statutory or other), charge or option to purchase, lease or otherwise acquire any interest, (ii) any adverse claim, restriction, covenant, title defect, hypothecation, assignment, deposit arrangement or other encumbrance of
any kind, preference or priority, or (iii) any other security agreement or preferential arrangement of any kind or nature whatsoever (including, without limitation, any conditional sale or other title retention agreement). 
  
 “Enhancements” means findings, improvements,
discoveries, inventions, additions, modifications, enhancements, derivative works, clinical development data, or changes to the Licensed Intellectual Property and Regulatory Files. 
  

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 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 “Equity Securities” means, with respect to any Person, shares of capital stock of
(or other ownership or profit interests in) such Person, warrants, options or other rights for the purchase or other acquisition from such Person of shares of capital stock of (or other ownership or profit interests in) such Person, securities
convertible into or exchangeable for shares of capital stock of (or other ownership or profit interests in) such Person or warrants, rights or options for the purchase or other acquisition from such Person of such shares (or such other interests),
and other ownership or profit interests in such Person (including, without limitation, partnership, member or trust interests therein), whether voting or nonvoting, and whether or not such shares, warrants, options, rights or other interests are
authorized or otherwise existing on any date of determination. 
  
 “ERISA” means the United States Employee Retirement Income Security Act of 1974, as amended. 
  
 “Exchange Act” means the Securities Exchange Act of 1934, as amended, and the rules and regulations promulgated thereunder.

  
 “Exelixis” means Exelixis, Inc., a
Delaware corporation. 
  
 “Exelixis Common
Stock” means the common stock, par value $0.001 per share, of Exelixis. 
  
 “Exelixis Common Stock Valuation” has the meaning set forth in Section 2(e) of the Purchase Option Agreement. 
  
 “Exelixis-GlaxoSmithKline Collaboration Committee” means the committee established by Exelixis and
GlaxoSmithKline pursuant to Section 2.2 of the GSK Agreement. 
  
 “Exelixis Member” has the meaning set forth in Section 2(c) of the Management Services Agreement. 
  
 “Exelixis Obligations” has the meaning set forth in Section 6.1 of the Amended and Restated Research and Development Agreement.

  
 “Exelixis Personnel” has the meaning
set forth in Section 8.4 of the Amended and Restated Research and Development Agreement. 
  
 “Existing NDA” has the meaning set forth in Section 2 of the Confidentiality Agreement. 
  
 “Expert” has the meaning set forth in Section 11.2(c) of the Amended and Restated Research and Development Agreement. 

 
 “Extension Funding” has the meaning set forth in
Section 2 of the Research Cost Sharing and Extension Agreement. 
  
 “External Directors” has the meaning set forth in the preamble of the Confidentiality Agreement. 
  

 39 
  

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IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 “FDA” means the United States Food and Drug Administration or its successor
agency in the United States. 
  
 “FDA
Sponsor” has the meaning set forth in Section 5.1 of the Amended and Restated Research and Development Agreement. 
  
 “Final Purchase Price” has the meaning set forth in Section 2(j)(ii) of the Purchase Option Agreement. 
  
 “Financial Audits” has the meaning set forth in
Section 6.7 of the Amended and Restated Research and Development Agreement. 
  
 “Financing” has the meaning set forth in the Preliminary Statement of the Purchase Option Agreement. 
  
 “Fiscal Year” has for each Operative Document in which it appears the meaning set forth in such Operative Document. 
  
 “Form S-3” means the Registration Form S-3 as defined
under the Securities Act. 
  
 “FTE” has
the meaning set forth in Section 4.1 of the Amended and Restated Research and Development Agreement. 
  
 “Funded Capital” has the meaning set forth in Section 2.02(b) of the Warrant Purchase Agreement. 
  
 “Funding Agreement” means the Funding Agreement,
dated June 9, 2005, among Exelixis, SCP and Investors. 
  
 “Funding Notice” has the meaning set forth in Section 2(a) of the Funding Agreement. 
  
 “Funds Price” has the meaning set forth in Section 2(b) of the Purchase Option Agreement. 
  
 “GAAP” means generally accepted accounting principles
in effect in the United States of America from time to time. 
  
 “GlaxoSmithKline” means SmithKline Beecham Corporation, a Pennsylvania corporation, doing business as GlaxoSmithKline. 
  
 “Governmental Approvals” means authorizations, consents, orders, declarations or approvals of, or filings with, or terminations or
expirations of waiting periods imposed by any Governmental Authority. 
  
 “Governmental Authority” means any United States or non-United States federal, national, supranational, state, provincial, local, or similar government, governmental, regulatory or administrative authority, agency or
commission or any court, tribunal, or judicial or arbitral body. 
  

 40 
  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 “Governmental Order” means any order, writ, judgment, injunction, decree,
stipulation, determination or award entered by or with any Governmental Authority. 
  
 “GSK Agreement” has the meaning set forth in Section 4.10 of the Novated and Restated Technology License Agreement. 
  
 “Hedge Agreement” means any interest rate swap, cap or collar agreement, interest rate future or
option contract, currency swap agreement, currency future or option contract or other similar hedging agreement. 
  
 “HHMI” has the meaning set forth in Annex C of the Novated and Restated Technology License Agreement. 
  
 “Holdings” means Symphony Evolution Holdings LLC, a
Delaware limited liability company. 
  
 “Holdings
Claims” has the meaning set forth in Section 5.01 of the Warrant Purchase Agreement. 
  
 “Holdings LLC Agreement” means the Second Amended and Restated Limited Liability Company Agreement of Holdings dated June 9, 2005.

  
 “HSR Act Filings” means the premerger
notification and report forms required under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended. 
  
 “IND” means an Investigational New Drug Application, as described in 21 U.S.C. § 355(i)(1) and 21 C.F.R. § 312 in the
regulations promulgated by the United States Food and Drug Administration, or any foreign equivalent thereof. 
  
 “Indemnification Agreement” means the Indemnification Agreement among Symphony Evolution and the Directors named therein, dated
June 9, 2005. 
  
 “Independent Accountant”
has the meaning set forth in Section 2(i)(ii) of the Purchase Option Agreement. 
  
 “Initial Funds” has the meaning set forth in Section 2(a) of the Funding Agreement. 
  
 “Initial Holdings LLC Agreement” means the Agreement of Limited Liability Company of Holdings, dated March 30, 2005. 

 
 “Initial Investors LLC Agreement” means the
Agreement of Limited Liability Company of Investors, dated May 20, 2005. 
  

 41 
  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 “Initial LLC Member” has the meaning set forth in Section 1.01 of the Holdings
LLC Agreement. 
  
 “Interest Certificate”
has the meaning set forth in Section 1.01 of the Holdings LLC Agreement. 
  
 “Interim Holdings LLC Agreement” means the Amended and Restated Agreement of Limited Liability Company of Holdings, dated June 2, 2005. 
  
 “Investment Company Act” means the Investment Company
Act of 1940, as amended. 
  
 “Investment
Overview” means the investment overview describing the transactions entered into pursuant to the Operative Documents. 
  
 “Investment Policy” has the meaning set forth in Section 1(a)(viii) of the Management Services Agreement. 
  
 “Investors” means Symphony Evolution Investors LLC.

  
 “Investors LLC Agreement” means
Amended and Restated Agreement of Limited Liability Company of Investors dated June 9, 2005. 
  
 “IRS” means the U.S. Internal Revenue Service. 
  
 “Knowledge” means the actual (and not imputed) knowledge of the executive officers of Exelixis, without the duty of inquiry or
investigation. 
  
 “Law” means any law,
statute, treaty, constitution, regulation, rule, ordinance, order or Governmental Approval, or other governmental restriction, requirement or determination, of or by any Governmental Authority. 
  
 “Ledger Fee” has the meaning set forth in Section
6(b) of the Management Services Agreement. 
  
 “License” has the meaning set forth in the Preliminary Statement of the Purchase Option Agreement. 
  
 “Licensed Intellectual Property” means the Licensed Patent Rights, Symphony Evolution Enhancements, Licensor Enhancements and the
Licensed Know-How. 
  
 “Licensed Know-How”
means any and all proprietary technology (other than the University IP) that is [ * ] 
  
 “Licensed Patent Rights” means:[ * ] 
  
 “Licensor” means Exelixis. 
  

 42 
  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 “Licensor Enhancements” means [ * ] 
  
 “Lien” has the meaning set forth in Section 1.01 of
the Holdings LLC Agreement. 
  
 “Liquidating
Event” has the meaning set forth in Section 8.01 of the Holdings LLC Agreement. 
  
 “LLC Agreements” means the Initial Holdings LLC Agreement, the Interim Holdings LLC Agreement, the Holdings LLC Agreement, the Initial Investors LLC Agreement and the Investors LLC Agreement.

  
 “Loss” has for each Operative Document
in which it appears the meaning set forth in such Operative Document. 
  
 “Management Budget” has the meaning set forth in Section 4.1 of the Amended and Restated Research and Development Agreement. 
  
 “Management Fee” has the meaning set forth in Section 6(a) of the Management Services Agreement. 
  
 “Management Plan” has the meaning set forth in
Section 4.1 of the Amended and Restated Research and Development Agreement. 
  
 “Management Services” has the meaning set forth in Section 1(a) of the Management Services Agreement. 
  
 “Management Services Agreement” means the Management Services Agreement between Symphony Evolution and RRD, dated as of June 9,
2005. 
  
 “Manager” means (i) for each LLC
Agreement in which it appears, the meaning set forth in such LLC Agreement, and (ii) for each other Operative Document in which it appears, RRD. 
  
 “Manager Event” has the meaning set forth in Section 3.01(f) of the Holdings LLC Agreement. 
  
 “Material Adverse Effect” means, with respect to any
Person, a material adverse effect on (i) the business, assets, property or condition (financial or otherwise) of such Person or, (ii) its ability to comply with and satisfy its respective agreements and obligations under the Operative Documents or,
(iii) the enforceability of the obligations of such Person of any of the Operative Documents to which it is a party. 
  
 “Material Change” has the meaning set forth in Paragraph 12 of Annex B of the Amended and Restated Research and Development
Agreement. 
  
 “Material Contract” has the
meaning set forth in Section 3(j) of the Management Services Agreement. 
  

 43 
  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 “Material Subsidiary” means, at any time, a Subsidiary of Exelixis having assets
in an amount equal to at least 5% of the amount of total consolidated assets of Exelixis and its Subsidiaries (determined as of the last day of the most recent fiscal quarter of Exelixis) or revenues or net income in an amount equal to at least 5%
of the amount of total consolidated revenues or net income of Exelixis and its Subsidiaries for the 12-month period ending on the last day of the most recent fiscal quarter of Exelixis. 
  
 “Maximum Committed Capital” has the meaning set forth in Section 2.02(b) of the Warrant Purchase
Agreement. 
  
 “Medical Discontinuation
Event” means (a) as specified in each Protocol, those data that, if collected in such Protocol, demonstrate that such Protocol should not be continued or (b) a series of adverse events, side effects or other undesirable outcomes that,
when collected in a Protocol, would cause a reasonable FDA Sponsor to discontinue such Protocol. 
  
 “Membership Interest” means (i) for each LLC Agreement in which it appears, the meaning set forth in such LLC Agreement, and (ii)
for each other Operative Document in which it appears, the meaning set forth in the Holdings LLC Agreement. 
  
 “NASDAQ” means the National Association of Securities Dealers Automatic Quotation System. 
  
 “NDA” means a New Drug Application, as defined in the
regulations promulgated by the United States Food and Drug Administration, or any foreign equivalent thereof. 
  
 “Net Debt” has the meaning set forth in Section 2(b) of the Purchase Option Agreement. 
  
 “Non-Exelixis Capital Transaction” means any (i) sale
or other disposition of all or part of the Symphony Evolution Shares or all or substantially all of the operating assets of Symphony Evolution, to a Person other than Exelixis or an Affiliate of Exelixis or (ii) distribution in kind of the Symphony
Evolution Shares following the expiration of the Purchase Option. 
  
 “Novated and Restated Technology License Agreement” means the Novated and Restated Technology License Agreement, dated as of June 9, 2005, among Exelixis, Symphony Evolution and Holdings. 
  
 “Operative Documents” means, collectively, the
Indemnification Agreement, the Holdings LLC Agreement, the Purchase Option Agreement, the Warrant Purchase Agreement, the Registration Rights Agreement, the Subscription Agreement, the Technology License Agreement, the Novated and Restated
Technology License Agreement, the Management Services Agreement, the Research and Development Agreement, the Amended and Restated Research and Development Agreement, the Research Cost Sharing and Extension Agreement, the Confidentiality Agreement,
the Funding Agreement and each other certificate and agreement executed in connection with any of the foregoing documents. 
  

 44 
  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 “Organizational Documents” means any certificates or articles of incorporation or
formation, partnership agreements, trust instruments, bylaws or other governing documents. 
  
 “Parties” means, for each Operative Document or other agreement in which it appears, the parties to such Operative Document or other agreement, as set forth therein (each a
“Party”). With respect to any agreement in which a provision is included therein by reference to a provision in another agreement, the term “Party” shall be read to refer to the parties to the document at hand, not
the agreement that is referenced. 
  
 “Payment
Terms” has the meaning set forth in Section 8.2 of the Amended and Restated Research and Development Agreement. 
  
 “Percentage” has the meaning set forth in Section 1.01 of the Holdings LLC Agreement. 
  
 “Permitted Investments” has the meaning set forth in
Section 1.01 of the Holdings LLC Agreement. 
  
 “Permitted Investments Letter” means the Permitted Investments Letter dated as of June 9, 2005, from Symphony Evolution to RRD, as set forth in Exhibit B to the Management Services Agreement. 
  
 “Permitted Lien” has the meaning set forth in Section
1.01 of the Holdings LLC Agreement. 
  
 “Person” means any individual, partnership (whether general or limited), limited liability company, corporation, trust, estate, association, nominee or other entity. 
  
 “Personnel” of a Party means such Party, its
employees, subcontractors, consultants, representatives and agents. 
  
 “Prime Rate” means the quoted “Prime Rate” at JPMorgan Chase Bank or, if such bank ceases to exist or is not quoting a base rate, prime rate reference rate or similar rate for United States dollar loans,
such other major money center commercial bank in New York City selected by the Manager. 
  
 “Product” means any product that contains or comprises XL647, XL784 or XL999 or any Structurally Related Compound thereof. 
  
 “Profit” has the meaning set forth in Section 1.01 of the Holdings LLC Agreement. 
  
 “Program Option” has the meaning set
forth in Section 11.1(a) of the Amended and Restated Research and Development Agreement. 
  
 “Program Option Closing Date” has the meaning set forth in Section 11.1(d) of the Amended and Restated Research and Development Agreement. 
  

 45 
  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 “Program Option Exercise Date” has the meaning set forth in Section
11.1(b) of the Amended and Restated Research and Development Agreement. 
  
 “Program Option Exercise Notice” has the meaning set forth in Section 11.1(b) of the Amended and Restated Research and Development Agreement. 
  
 “Program Option Exercise Price” has the meaning set
forth in Section 11.1(c) of the Amended and Restated Research and Development Agreement. 
  
 “Program Option Period” has the meaning set forth in Section 11.1(a) of the Amended and Restated Research and Development Agreement. 
  
 “Programs” means those certain clinical programs
pursuing indications for XL647, XL784, and XL999 in accordance with the Development Plan (each a “Program”). 
  
 “Protocol” means a written protocol that meets the substantive requirements of Section 6 of the ICH Guideline for Good Clinical
Practice as adopted by the FDA, effective May 9, 1997 and is included within the Clinical Plan or later modified or added to the Clinical Plan pursuant to Section 4.2 of the Amended and Restated Research and Development Agreement. 
  
 “Public Companies” has the meaning set forth in
Section 5(e) of the Purchase Option Agreement. 
  
 “Purchase Option” has the meaning set forth in Section 1(a) of the Purchase Option Agreement. 
  
 “Purchase Option Agreement” means this Purchase Option Agreement dated as of June 9, 2005, among Exelixis, Holdings and Symphony
Evolution. 
  
 “Purchase Option Closing
Date” has the meaning set forth in Section 2(a) of the Purchase Option Agreement. 
  
 “Purchase Option Dispute Notice” has the meaning set forth in Section 2(b) of the Purchase Option Agreement. 
  
 “Purchase Option Exercise Date” has the meaning set forth in Section 2(a) of the Purchase Option
Agreement. 
  
 “Purchase Option Exercise
Notice” has the meaning set forth in Section 2(a) of the Purchase Option Agreement. 
  
 “Purchase Option Period” has the meaning set forth in Section 1(c)(iii) of the Purchase Option Agreement. 
  
 “Purchase Price” has the meaning set forth in Section
2(b) of the Purchase Option Agreement. 
  

 46 
  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 “QA Audits” has the meaning set forth in Section 6.6 of the Amended and Restated
Research and Development Agreement. 
  
 “Quarterly
Meeting” has the meaning set forth in Paragraph 6 of Annex B of the Amended and Restated Research and Development Agreement. 
  
 “Regents” has the meaning set forth in Section 3.1 of the Novated and Restated Technology License Agreement. 
  
 “Regents Agreement” has the meaning set forth in
Section 3.1 of the Novated and Restated Technology License Agreement. 
  
 “Regents Claims” has the meaning set forth in Annex C of the Novated and Restated Technology License Agreement. 
  
 “Regents Indemnitees” has the meaning set forth in Annex C of the Novated and Restated Technology License Agreement. 

 
 “Regents Technology” has the meaning set forth in
Annex C of the Novated and Restated Technology License Agreement. 
  
 “Registration Rights Agreement” means the Registration Rights Agreement dated as of the Closing Date, between Exelixis and Holdings. 
  
 “Registration Statement” has the meaning set forth in Section 1(b) of the Registration Rights
Agreement. 
  
 “Regulatory Authority”
means the United States Food and Drug Administration, or any successor agency in the United States, or any health regulatory authority(ies) in any other country that is a counterpart to the FDA and has responsibility for granting registrations or
other regulatory approval for the marketing, manufacture, storage, sale or use of drugs in such other country. 
  
 “Regulatory Allocation” has the meaning set forth in Section 3.06 of the Holdings LLC Agreement. 
  
 “Regulatory Files” means any IND, NDA or any other
filings filed with any Regulatory Authority with respect to XL647, XL784, XL999 or the Programs. 
  
 “Removed Director” has the meaning set forth in Section 3.01(h)(i) of the Holdings LLC Agreement. 
  
 “Representative” of any Person means such
Person’s shareholders, principals, directors, officers, employees, members, managers and/or partners. 
  
 “Research and Development Agreement” means the Research and Development Agreement dated as of June 9, 2005, between Exelixis and
Holdings. 
  

 47 
  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 “Research Cost Sharing and Extension Agreement” means the Research Cost Sharing
and Extension Agreement dated as of June 9, 2005, between Exelixis, Holdings, and Symphony Evolution. 
  
 “RRD” means RRD International, LLC, a Delaware limited liability company. 
  
 “RRD Indemnified Party” has the meaning set forth in
Section 10(a)(i) of the Management Services Agreement. 
  
 “RRD Loss” has the meaning set forth in Section 10(a)(i) of the Management Services Agreement. 
  
 “Schedule K-1” has the meaning set forth in Section 9.02(a) of the Holdings LLC Agreement. 
  
 “Scientific Discontinuation Event” has the meaning
set forth in Section 4.2(f) of the Amended and Restated Research and Development Agreement. 
  
 “SCP” means Symphony Capital Partners, L.P., a Delaware limited partnership. 
  
 “SEC” means the United States Securities and Exchange Commission. 
  
 “Securities Act” means the Securities Act of 1933, as amended. 
  
 “Shareholder” means any Person who owns any
Symphony Evolution Shares. 
  
 “Solvent”
has the meaning set forth in Section 1.01 of the Holdings LLC Agreement. 
  
 “SSP” means Symphony Strategic Partners, LLC, a Delaware limited liability company. 
  
 “Stock Payment Date” has the meaning set forth in Section 2 of the Subscription Agreement. 
  
 “Stock Purchase Price” has the meaning set forth in
Section 2 of the Subscription Agreement. 
  
 “Structurally Related Compound” means: 
  
 (a) with respect to XL647, any compound that is [ * ] 
  
 (b) with respect to XL784, any compound that is [ * ] 
  
 (c) with respect to XL999, any compound that is [ * ] 
  
 “Subcontracting Agreement” has the meaning set forth
in Section 6.3 of the Amended and Restated Research and Development Agreement. 
  

 48 
  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 “Subcontractor” has the meaning set forth in Section 6.3 of the Amended and
Restated Research and Development Agreement. 
  
 “Subscription Agreement” means the Subscription Agreement between Symphony Evolution and Holdings, dated as of June 9, 2005. 
  
 “Subsidiary” of any Person means any corporation, partnership, joint venture, limited liability company, trust or estate of which
(or in which) more than 50% of (a) the issued and outstanding capital stock having ordinary voting power to elect a majority of the board of directors of such corporation (irrespective of whether at the time capital stock of any other class or
classes of such corporation shall or might have voting power upon the occurrence of any contingency); (b) the interest in the capital or profits of such partnership, joint venture or limited liability company; or (c) the beneficial interest in such
trust or estate is at the time directly or indirectly owned or controlled by such Person, by such Person and one or more of its other Subsidiaries or by one or more of such Person’s other Subsidiaries. 
  
 “Surviving Entity” means
the surviving legal entity which is surviving entity to Exelixis after giving effect to a Change of Control. 
  
 “Symphony Capital” means Symphony Capital LLC, a Delaware limited liability company. 
  
 “Symphony Evolution” means Symphony Evolution, Inc.,
a Delaware corporation. 
  
 “Symphony Evolution
Board” means the Symphony Evolution board of directors. 
  
 “Symphony Evolution By-laws” means the By-laws of Symphony Evolution, as adopted by resolution of the Symphony Evolution Board on June 9, 2005. 
  
 “Symphony Evolution Charter” means the Amended and Restated Certificate of Incorporation of Symphony
Evolution, dated as of June 9, 2005. 
  
 “Symphony
Evolution Director Event” has the meaning set forth in Section 3.01(h)(i) of the Holdings LLC Agreement. 
  
 “Symphony Evolution Enhancements” means [ * ] 
  
 “Symphony Evolution Equity Securities” means the Common Stock and any other stock or shares issued
by Symphony Evolution. 
  
 “Symphony Evolution
Loss” has the meaning set forth in Section 10(b) of the Management Services Agreement. 
  
 “Symphony Evolution Securities Encumbrance” has the meaning set forth in Section 4(b)(ii) of the Purchase Option Agreement.

  

 49 
  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 “Symphony Evolution Shares” has the meaning set forth in Section 2.02 of the
Holdings LLC Agreement. 
  
 “Symphony
Funds” means Symphony Capital Partners, L.P., a Delaware limited partnership, and Symphony Strategic Partners, LLC, a Delaware limited liability company (each a “Symphony Fund”). 
  
 “Symphony Member” has the meaning set forth in
Section 4.2(d) of the Amended and Restated Research and Development Agreement. 
  
 “Tangible Materials” means [ * ]. 
  
 “Tax Amount” has the meaning set forth in Section 4.02 of the Holdings LLC Agreement. 
  
 “Technology License Agreement” means the Technology License Agreement, dated as of June 9, 2005, between Exelixis and Holdings.

  
 “Term” means the period starting on
the Closing Date and ending upon the termination or expiration of the Purchase Option Period. 
  
 “Territory” means the world. 
  
 “Third Party IP” has the meaning set forth in Section 2.9 of the Novated and Restated Technology License Agreement. 
  
 “Third Party Licensor” means (a) a third party from which Exelixis has received a license or
sublicense to Licensed Intellectual Property or (b) a third party to which Exelixis has granted a license or sublicense to the Licensed Intellectual Property. As of the Closing Date, GlaxoSmithKline is the only Third Party Licensor. 
  
 “Transfer” has for each Operative Document in which
it appears the meaning set forth in such Operative Document. 
  
 “Transferee” has, for each Operative Document in which it appears, the meaning set forth in such Operative Document. 
  
 “University Agreements” has the meaning set forth in Section 3.1 of the Novated and Restated Technology License Agreement.

  
 “University IP” has the meaning set
forth in Section 3.1 of the Novated and Restated Technology License Agreement. 
  
 “Voluntary Bankruptcy” has the meaning set forth in Section 1.01 of the Holdings LLC Agreement. 
  
 “Warrant Closing” has the meaning set forth in Section 2.07 of the Warrant Purchase Agreement. 
  

 50 
  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 “Warrant Date” has the meaning set forth in Section 2.06 of the Warrant Purchase
Agreement. 
  
 “Warrant Purchase
Agreement” means the Warrant Purchase Agreement dated as of the Closing Date, between Exelixis and Holdings. 
  
 “Warrants” has the meaning set forth in Section 2.03 of the Warrant Purchase Agreement. 
  
 “Warrant Share Legend” has the meaning set forth in
Section 6.02 of the Warrant Purchase Agreement. 
  
 “Warrant Shares” has the meaning set forth in Section 2.03 of the Warrant Purchase Agreement. 
  
 “XL647” means: [ * ] 
  
 “XL784” means: [ * ] 
  
 “XL999” means: [ * ] 
  
 “Yale” has the meaning set forth in Section 3.1 of the Novated and Restated Technology License Agreement. 
  
 “Yale Agreement” has the meaning set forth in Section
3.1 of the Novated and Restated Technology License Agreement. 
  
 “Yale Claims” has the meaning set forth in Annex C of the Novated and Restated Technology License Agreement. 
  
 “Yale Indemnitees” has the meaning set forth in Annex C of the Novated and Restated Technology License Agreement. 
  
 “Yale Technology” has the meaning set forth in Annex
C of the Novated and Restated Technology License Agreement. 
  

 51 
  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 Exhibit 1 
  

Purchase Exercise Notice 
  
 [ * ] 

  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 Exhibit 2 
  

Form of Opinion of Cooley Godward, LLP 
  
 June 9, 2005 
  
 Symphony Evolution Holdings LLC 
 7361 Calhoun Place, Suite 325 
 Rockville, MD 20850 
  
 Dear Ladies and Gentlemen:

  
 We have acted as counsel for Exelixis, Inc., a Delaware corporation (the
“Company”), in connection with the financing of the clinical development of certain of the Company’s product candidates (the “Financing”). In connection with the Financing, the Company is entering into the agreements listed
on Schedule I hereto (collectively, the “Transaction Agreements”). We are rendering this opinion pursuant to Section 3.02(d) of the Warrant Purchase Agreement. 
  
 In connection with this opinion, we have examined and relied upon the representations and warranties as to factual matters contained in and
made pursuant to the Transaction Agreements by the various parties and originals, or copies certified to our satisfaction, of such records, documents, certificates, opinions, memoranda and other instruments as in our judgment are necessary or
appropriate to enable us to render the opinion expressed below. 
  
 As to certain
factual matters, we have relied upon certificates of officers of the Company and have not sought to independently verify such matters. Where we render an opinion “to our knowledge” or concerning an item “known to us” or our
opinion otherwise refers to our knowledge, it is based solely upon (i) an inquiry of attorneys within this firm who have represented the Company in this transaction, (ii) receipt of a certificate executed by an officer of the Company covering such
matters and (iii) such other investigation, if any, that we specifically set forth herein. 
  
 In rendering this opinion, we have assumed: the authenticity of all documents submitted to us as originals; the conformity to originals of all documents submitted to us as copies; the accuracy, completeness and
authenticity of certificates of public officials; the due authorization, execution and delivery of all documents (except the due authorization, execution and delivery by the Company of the Transaction Agreements), where authorization, execution and
delivery are prerequisites to the effectiveness of such documents; and the genuineness and authenticity of all signatures on original documents (except the signatures on behalf of the Company on the Transaction Agreements). We have also assumed:
that all individuals executing and delivering documents had the legal capacity to so execute and deliver; that the Transaction Agreements are obligations binding upon the parties thereto other than the Company; that the parties to the 

  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 Transaction Agreements other than the Company have filed any required California franchise or income tax returns and have
paid any required California franchise or income taxes; and that there are no extrinsic agreements or understandings among the parties to the Transaction Agreements or to the Material Agreements (as defined below) that would modify or interpret the
terms of any such agreements or the respective rights or obligations of the parties thereunder. 
  
 Our opinion is expressed only with respect to the federal laws of the United States of America and the laws of the State of California and the General Corporation Law of the State of Delaware. We note that the parties
to the Transaction Agreements have designated the laws of the State of New York as the laws governing the Transaction Agreements. Our opinion in paragraph 5 below as to the validity, binding effect and enforceability of the Transaction Agreements is
premised upon the result that would obtain if a California court were to apply the internal laws of the State of California (notwithstanding the designation of the laws of the State of New York) to the interpretation and enforcement of the
Transaction Agreements. We express no opinion as to whether the laws of any particular jurisdiction apply, and no opinion to the extent that the laws of any jurisdiction other than those identified above are applicable to the subject matter hereof.

  
 We are not rendering any opinion as to any statute, rule, regulation,
ordinance, decree or decisional law relating to antitrust, banking, land use, environmental, pension, employee benefit, tax, fraudulent conveyance, usury, laws governing the legality of investments for regulated entities, regulations T, U or X of
the Board of Governors of the Federal Reserve System or local law. Furthermore, we express no opinion with respect to compliance with antifraud laws, rules or regulations relating to securities or the offer and sale thereof; compliance with
fiduciary duties by the Company’s Board of Directors or stockholders; compliance with safe harbors for disinterested Board of Director or stockholder approvals; compliance with state securities or blue sky laws except as specifically set forth
below; or compliance with laws that place limitations on corporate distributions. 
  
 With regard to our opinion in paragraph 1 below with respect to the good standing of the Company, we have relied solely upon a certificate of the Secretary of State of the State of Delaware as of a recent date. 
  
 With regard to our opinion paragraph 3 below concerning defaults under and any material
breaches of any agreement identified on Schedule II hereto, we have relied solely upon (i) a certificate of an officer of the Company, (ii) a list supplied to us by the Company of material agreements to which the Company is a party, or by which it
is bound, a copy of which is attached hereto as Schedule II (the “Material Agreements”) and (iii) an examination of the Material Agreements in the form provided to us by the Company. We have made no further investigation. Further, with
regard to our opinion in paragraph 3 below concerning Material Agreements, we express no opinion as to (i) financial covenants or similar provisions therein requiring financial calculations or determinations to ascertain compliance, (ii) provisions
therein relating to the 

  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 occurrence of a “material adverse event” or words of similar import or (iii) any statement or writing that may
constitute parol evidence bearing on interpretation or construction. 
  
 With
regard to our opinion in paragraph 7 below, we express no opinion to the extent that, notwithstanding its current reservation of shares of Common Stock, future issuances of securities of the Company and/or antidilution adjustments to outstanding
securities of the Company may cause the Warrant Shares to be convertible for more shares of Common Stock than the number that then remain authorized but unissued. 
  
 With regard to our opinion in paragraph 8 with respect to exemption from registration, no opinion is expressed with respect to the
integration of the offer and sale of the Warrants or the Warrant Shares with any offers or sales of securities occurring subsequent to the date hereof. 
  
 With regard to our opinion in paragraph 9 below, we have based our opinion, to the extent we consider appropriate, on Rule 3a-8 under the Investment Company Act of 1940,
as amended, and a certificate of an officer of the Company as to compliance with each of the requirements necessary to comply with Rule 3a-8. We have conducted no further investigation. 
  
 On the basis of the foregoing, in reliance thereon and with the foregoing qualifications, we are of the opinion that: 
  

	1.	The Company has been duly incorporated and is a validly existing corporation in good standing under the laws of the State of Delaware. 

  

	2.	The Company has the corporate power to execute, deliver and perform its obligations under the Transaction Agreements. Each of the Transaction Agreements has been duly and validly
authorized, executed and delivered by the Company. 

  

	3.	The execution and delivery of the Transaction Agreements by the Company and the consummation of the transactions contemplated thereby that would occur at the closing of the sale and
issuance of the Warrant (as defined on Schedule I hereto) will not, (a) violate any provision of the Company’s certificate of incorporation or by-laws, (b) violate any governmental statute, rule or regulation which in our experience is
typically applicable to transactions of the nature contemplated by the Transaction Agreements, (c) violate any order, writ, judgment, injunction, decree, determination or award which has been entered against the Company and of which we are aware or
(d) constitute a default under or a material breach of any Material Agreement, in the case of clause (d) to the extent such default or breach would materially and adversely affect the Company. 

  

	4.	All consents, approvals, authorizations or orders of, and filings, registrations and qualifications with any U.S. Federal or California regulatory authority or governmental body
required for the due execution or delivery by the Company of any Transaction Agreement and the sale and issuance of the Warrant have been made or obtained, except 

  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

	  	(a) for the filing of a Form D pursuant to Securities and Exchange Commission Regulation D and (b) for the filing of the notice to be filed under California Corporations Code
Section 25102.1(d). 

  

	5.	Each of the [ * ] constitutes, and, if the B Warrants and C Warrants (each as defined in the Warrant Purchase Agreement) were to be issued at the closing of the sale and issuance of
the Warrant in accordance with the terms of the Warrant Purchase Agreement, each of the B Warrants and the C Warrants would constitute, a valid and binding agreement of the Company, enforceable against the Company in accordance with its respective
terms, except as rights to indemnity and contribution under Sections 6 and 7 of the Registration Rights Agreement, Section 10 of the Purchase Option Agreement, Article V of the Warrant Purchase Agreement, Section 15 of the Research and Development
Agreement, Section 15 of the Amended and Restated Research and Development Agreement, Section 6 of the Technology License Agreement, Section 6 of the Novated and Restated Technology License Agreement, Paragraphs (c)(iv) under “Yale
Agreement” in Annex C of the Technology License Agreement, Paragraph (c)(vi) under “Regents Agreement” in Annex C of the Technology License Agreement, Paragraph (c)(iv) under “Yale Agreement” in Annex C of the Novated and
Restated Technology License Agreement and Paragraph (c)(vi) under “Regents Agreement” in Annex C of the Novated and Restated Technology License Agreement may be limited by applicable laws and except as enforcement may be limited by
applicable bankruptcy, insolvency, reorganization, arrangement, suretyship, dissolution, moratorium, receivership or other similar laws affecting creditors’ rights and the law of fraudulent transfer, and subject to state law, federal law, or
general equity principles and to limitations on availability of equitable relief, including specific performance, regardless of whether enforcement is considered in a proceeding in equity or at law. 

  

	6.	The offer and sale of the Warrants (as defined in the Warrant Purchase Agreement) have been duly authorized by the Company. 

  

	7.	The Warrant Shares (as defined in the Warrant Purchase Agreement) and, assuming the Purchase Option (as defined in the Purchase Option Agreement) is exercised in accordance with the
Purchase Option Agreement, the Exelixis Common Stock (as defined in the Purchase Option Agreement), when sold and issued in accordance with the terms of the Warrants or the Purchase Option Agreement, as applicable, will be validly issued, fully paid
and non-assessable, and the issuance of the Warrant Shares is not be subject to preemptive rights pursuant to the General Corporation Law of the State of Delaware, the certificate of incorporation or by-laws of the Company or similar rights to
subscribe pursuant to any Material Agreement. 

  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

	8.	The offer and sale of the Warrants and Warrant Shares are and will be exempt from the registration requirements of the Securities Act of 1933, as amended, subject to the timely
filing of a Form D pursuant to Securities and Exchange Commission Regulation D. 

  

	9.	The Company is not an “investment company” as defined in the Investment Company Act of 1940, as amended. 

  
 [ * ] 

  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 This opinion is intended solely for your benefit and is not to be made available to or be relied upon by any other
person, firm, or entity without our prior written consent. 
  
 Very truly yours,

  
 COOLEY GODWARD LLP 
  
  

			
	 By:
	 	 /s/ Robert L. Jones

	 	 	 Robert L. Jones

  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 SCHEDULE I 
  
 LIST OF TRANSACTION AGREEMENTS 
  

	1.	Warrant Purchase Agreement, dated as of June 9, 2005, between the Company and Symphony Evolution Holdings LLC (the “Warrant Purchase Agreement”). 

 

	2.	Warrant to purchase 750,000 shares of common stock of the Company, dated as of June 9, 2005 (the “Warrant”). 

  

	3.	Purchase Option Agreement, dated as of June 9, 2005, by and among the Company, Symphony Evolution Holdings LLC and Symphony Evolution, Inc. (the “Purchase Option
Agreement”). 

  

	4.	Research and Development Agreement, dated as of June 9, 2005, between the Company and Symphony Evolution Holdings LLC (the “Research and Development Agreement”).

  

	5.	Amended & Restated Research and Development Agreement, dated as of June 9, 2005, between the Company, Symphony Evolution, Inc. and Symphony Evolution Holdings LLC (the
“Amended & Restated Research and Development Agreement”). 

  

	6.	Technology License Agreement, dated as of June 9, 2005, between the Company and Symphony Evolution Holdings LLC (the “Technology License Agreement”).

  

	7.	Novated and Restated Technology License Agreement, dated as of June 9, 2005, between the Company, Symphony Evolution, Inc. and Symphony Evolution Holdings LLC (the “Novated and
Restated Technology License Agreement”). 

  

	8.	Confidentiality Agreement, dated as of June 9, 2005, by and among the Company, Symphony Evolution, Inc. and Symphony Evolution Holdings LLC, Symphony Capital Partners, L.P.,
Symphony Strategic Partners, LLC, Symphony Evolution Investors, LLC, Symphony Capital LLC, RRD International, LLC, Daniel F. Hoth, M.D., Herbert J. Conrad, and Alastair J.J. Wood, M.D. (the “Confidentiality Agreement”).

  

	9.	Funding Agreement, dated as of June 9, 2005, by and among the Company, Symphony Capital Partners, L.P., Symphony Evolution Holdings LLC and Symphony Evolution Investors, LLC (the
“Funding Agreement”). 

  

	10.	Registration Rights Agreement, dated as of June 9, 2005, between the Company and Symphony Evolution Holdings LLC (the “Registration Rights Agreement”).

  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

	11.	Research Cost Sharing and Extension Agreement, dated as of June 9, 2005, by and among the Company, Symphony Evolution Holdings LLC and Symphony Evolution, Inc. (the “Research
Cost Sharing and Extension Agreement”). 

  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 

 SCHEDULE II 
  
 LIST OF MATERIAL AGREEMENTS 
  
 [ * ] 

  

 [ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED
IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO RULE 24B-2
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.

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