Document:

Exhibit 4.1

 

VERSAR, INC.

 

2005 AMENDED AND RESTATED EMPLOYEE
STOCK PURCHASE PLAN

 

The following constitute the provisions
of the 2005 Amended and Restated Employee Stock Purchase Plan of Versar, Inc.

 

1.             
Purpose. The purpose of the Plan is to provide employees of the Company and its Designated Subsidiaries with
an opportunity to purchase Common Shares of the Company. It is the intention, but not the obligation, of the Company to have the
Plan qualify as an "employee stock purchase plan" under Section 423 of the Code. The provisions of the Plan shall, accordingly,
be construed so as to extend and limit participation in a manner consistent with the requirements of that section of the Code.

 

2.             
Definitions.

 

(a)               
“Administrator” means (i) any person or committee to whom the Board delegates administrative discretion
under the Plan, and (ii) the Board, which may exercise any and all administrative powers associated with the Plan.

 

(b)              
"Board" means the Board of Directors of the Company.

 

(c)               
"Code" means the Internal Revenue Code of 1986, as amended.

 

(d)              
"Common Shares" means shares of common stock, par value $.01 per share, of the Company.

 

(e)               
"Company" means Versar, Inc., a Delaware corporation.

 

(f)               
"Compensation"
means the sums of the types and amounts of compensation determined from time to time by the Administrator in its sole discretion
to be eligible to be taken into account under the Plan, provided that no such determination shall include or exclude any type or
amount of compensation contrary to the requirements of Section 423 of the Code, including the equal treatment of participants having
the same employer corporation.

 

(g)               
"Continuous Status as an Employee"
means the absence of any interruption or termination of service as an Employee. Continuous Status as an Employee shall not be considered
interrupted in the case of (i) sick leave; (ii) military leave; (iii) any other leave of absence approved by the Administrator,
provided that such leave is for a period of not more than 90 days, unless reemployment upon the expiration of such leave is guaranteed
by contract or statute, or unless provided otherwise pursuant to Company policy adopted from time to time; or (iv) in the case
of transfers between locations of the Company or between the Company and its Designated Subsidiaries.

 

(h)               
"Contributions" means all
amounts credited to the account of a participant pursuant to the Plan.

 

    	 

    	 

    

 

(i)               
"Corporate Transaction" means
a sale of all or substantially all of the Company's assets, or a merger, consolidation, or other capital reorganization of the
Company with or into another corporation, or any other transaction or series of related transactions in which the Company's shareholders
immediately prior thereto own less than 50% of the voting shares of beneficial interest of the Company (or its successor or parent)
immediately thereafter.

 

(j)               
"Designated Subsidiaries"
means the Subsidiaries (or other entities with respect to sub-plans established under Section 19(d) hereof) that have been designated
by the Board from time to time in its sole discretion as eligible to participate in the Plan.

 

(k)               
"Employee" means any person,
including an Officer, whom the Company or one of its Designated Subsidiaries classifies as an employee for payroll tax purposes
and who (i) is customarily employed by the Company or one of its Designated Subsidiaries for at least 20 hours per week, and (ii)
is customarily employed by the Company or one of its Designated Subsidiaries for more than five months in a calendar year.

 

(l)               
"Exchange Act" means the
Securities Exchange Act of 1934, as amended.

 

(m)               
"Offering Date" means the
first business day of each Purchase Period of the Plan.

 

(n)               
"Officer" means a person
who is an officer of the Company within the meaning of Section 16 of the Exchange Act and the rules and regulations promulgated
thereunder.

 

(o)               
"Plan" means this 2005 Amended
and Restated Employee Stock Purchase Plan.

 

(p)               
"Purchase Date" means the
last day of each Purchase Period of the Plan, provided, however, that if such date is not a business day, the “Purchase Date”
shall mean the immediately preceding business day.

 

(q)               
“Purchase Period” means
a period of one calendar month (or such other period of up to 27 consecutive months that the Administrator may determine in its
sole discretion before an Offering Date), except for the first Purchase Period set forth in Section 4(b).

 

(r)               
"Purchase Price" means with
respect to a Purchase Period an amount equal to 95% of the Fair Market Value (as defined in Section 7(b) below) of a Share on the
Purchase Date; provided, however, that the Administrator may before any Offering Date establish a different formula for determining
the Purchase Price so long as the formula does not result in a lower Purchase Price than is allowable under Section 423(b)(6) of
the Code.

 

(s)               
"Share" means one Common
Share, as adjusted in accordance with Section 18 of the Plan.

 

(t)               
"Subsidiary" means
a corporation (or an unincorporated entity of which the Company is a co-employer of its employees), domestic or foreign, of which
not less than 50% of the voting shares are held by the Company or a Subsidiary, whether or not such corporation now exists or is
hereafter organized or acquired by the Company or a Subsidiary.

 

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3.             
Eligibility.

 

(a)               
Any person who is an Employee as of the date 30 days before the Offering Date of a given Purchase Period shall be eligible
to participate in such Purchase Period under the Plan, subject to the requirements of Section 5(a) and the limitations imposed
by Section 423(b) of the Code; provided however that eligible Employees may not participate in more than one Purchase Period at
a time.

 

(b)              
Any provisions of the Plan to the contrary notwithstanding other than Section 3(c), no Employee shall be granted an option
under the Plan (i) if, immediately after the grant, such Employee (or any other person whose stock would be attributed to such
Employee pursuant to Section 424(d) of the Code) would own shares of beneficial ownership of the Company and/or hold outstanding
options to purchase Shares possessing five percent (5%) or more of the total combined voting power or value of all classes of Shares
of the Company or shares of common stock of any Subsidiary of the Company, or (ii) if such option would permit his or her rights
to purchase Shares under all employee stock purchase plans (described in Section 423 of the Code) of the Company and its Subsidiaries
to accrue at a rate that exceeds Twenty-Five Thousand Dollars ($25,000) of the Fair Market Value (as defined in Section 7(b) below)
of such Shares (determined at the time such option is granted) for each calendar year in which such option is outstanding at any
time.

 

(c)               
Company directors, independent contractors (the meaning of such terms to be determined by the Administrator in its sole
discretion), employees of affiliates of the Company that are not corporate Subsidiaries, and Employees who are ineligible to participate
pursuant to Section 3(b)(i) above may, in the sole discretion of the Administrator, be eligible to participate in any Company sub-plan
or sub-plans that the Administrator may establish in accordance with Section 19(d) below.

 

4.     
Purchase Periods. Purchase Periods shall generally commence on the first day of each calendar month (e.g.,
January 1, February 1, March 1) and shall end on the last day of the calendar month in which the Purchase Period begins. The Administrator
shall have the discretion to establish the first Purchase Period as commencing on or after the effective date determined in Section
22 below. The Administrator shall have the power to change the duration and/or frequency of Purchase Periods with respect to future
purchases without stockholder approval, provided that the Administrator shall announce any such change at least fifteen (15) days
prior to the scheduled beginning of the first Purchase Period to be affected.

 

5.     
Participation.

 

(a)               
An eligible Employee may become a participant in the Plan by completing a subscription agreement on the form provided by
the Company and filing it with the Company's Human Resources Department or the stock brokerage or other financial services firms
designated or approved by the Administrator from time to time (each, a "Designated Broker") prior to the applicable
Offering Date, unless a later time for filing the subscription agreement is set by the Board for all eligible Employees with respect
to a given Purchase Period. The subscription agreement shall set forth the percentage of the participant's Compensation (subject
to Section 6(a) below) to be paid as Contributions pursuant to the Plan.

 

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(b)              
Payroll deductions shall commence on the first full payroll following the Offering Date and shall end on the last payroll
paid on or prior to the last Purchase Period to which the subscription agreement is applicable, unless sooner terminated by the
participant as provided in Section 10.

 

(c)               
A participant's subscription agreement shall remain in effect for successive Purchase Periods unless modified as provided
in Section 6 or terminated as provided in Section 10.

 

6.             
Method of Payment of Contributions.

 

(a)               
A participant shall elect to have payroll deductions made on each payday during the Purchase Period in an amount not less
than $25 per payroll period and not more than twenty-five percent (25%) (or such other percentage as the Administrator
may establish from time to time before an Offering Date) of such participant's Compensation on each payday during the Purchase
Period. All payroll deductions made by a participant shall be credited to his or her account under the Plan. A participant may
not make any additional payments into such account.

 

(b)              
A participant may discontinue his or her participation in the Plan as provided in Section 10, and may increase or decrease
the rate of his or her Contributions with respect to the Purchase Period only in accordance with rules that the Administrator establishes
before the Offering begins. Any change in rate shall be effective as of the beginning of the next calendar month following the
date of filing of the new subscription agreement, if the agreement is filed at least ten (10) business days prior to such date
and, if not, as of the beginning of the next succeeding calendar month.

 

(c)               
Notwithstanding the foregoing, to the extent necessary to comply with Section 423(b)(8) of the Code and Section 3(b) herein,
a participant's payroll deductions may be decreased during any Purchase Period scheduled to end during the current calendar year
to 0%. Payroll deductions shall re-commence at the rate provided in such participant's subscription agreement at the beginning
of the first Purchase Period that is scheduled to end in the following calendar year, unless terminated by the participant as provided
in Section 10.

 

7.             
Grant of Option.

 

(a)   
On the Offering Date of each Purchase Period, each eligible Employee participating in such Purchase Period shall be granted
an option to purchase on the Purchase Date for the Purchase Period a number of Shares determined by dividing such Employee's Contributions
accumulated prior to such Purchase Date and retained in the participant's account as of the Purchase Date by the applicable Purchase
Price; provided however that the maximum number of Shares an Employee may purchase during each Purchase Period shall be 500 Shares
(subject to any adjustment pursuant to Section 18 below, as well as to such other number of Shares as the Administrator may establish
from time to time before an Offering Date), and provided further that such purchase shall be subject to the limitations set forth
in Sections 3(b) and 13.

 

(b)  
The fair market value of the Company's Common Shares on a given date (the “Fair Market Value") shall be
–

 

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(i) the closing sales price of
the Common Shares for such date (or, in the event that the Common Shares are not traded on such date, on the immediately preceding
trading date), as reported by the New York Stock Exchange or the American Stock Exchange, or, if such price is not reported, then
on the nearest preceding trading day during which a sale occurred; or

 

(ii) if such stock is not
traded on either exchange but is quoted on NASDAQ or a successor quotation system (A) the last sales price (if the stock is then
listed as a National Market Issue under The Nasdaq National Market System) or (B) the mean of the bid and asked prices per-share
of the Common Shares as reported by the NASDAQ or successor or,

 

(iii) in the event the Common
Shares are not listed on a stock exchange or quoted on NASDAQ but is otherwise traded in the over-the-counter market, the Fair
Market Value per share shall be the mean between the most recent representative bid and asked prices; or

 

(iv) if subsections (i)-(iii)
do not apply, the fair market value established in good faith by the Board.

 

8.             
Exercise of Option. Unless a participant withdraws from the Plan as provided in Section 10, his or her option
for the purchase of Shares will be exercised automatically on each Purchase Date of a Purchase Period, and the maximum number of
full Shares subject to the option will be purchased at the applicable Purchase Price with the accumulated Contributions in his
or her account. No fractional Shares shall be sold or issued pursuant to the Plan. Any payroll deductions accumulated in a participant's
account that are not sufficient to purchase a full Share shall be retained in the participant's account for the subsequent Purchase
Period, subject to earlier withdrawal by the participant as provided in Section 10 below. Any other amounts left over in a participant's
account after a Purchase Date shall be returned to the participant. The Shares purchased upon exercise of an option hereunder shall
be deemed to be transferred to the participant on the Purchase Date. During his or her lifetime, a participant's option to purchase
Shares hereunder is exercisable only by him or her.

 

9.             
Delivery. As promptly as practicable after each Purchase Date of each Purchase Period, the number of Shares
purchased by each participant upon exercise of his or her option shall be deposited into an account established in the participant's
name with a Designated Broker.

 

10.         
Voluntary Withdrawal; Termination of Employment.

 

(a)               
A participant may withdraw all but not less than all the Contributions credited to his or her account under the Plan at
any time prior to each Purchase Date by giving written notice to the Company or the Designated Broker, in the form
and manner as directed by the Company, at least five (5) days prior to the Purchase Date. All of the participant's Contributions
credited to his or her account will be paid to him or her promptly after receipt of his or her notice of withdrawal and his or
her option for the current period will be automatically terminated, and no further Contributions for the purchase of Shares will
be made during the Purchase Period.

 

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(b)              
Upon termination of the participant's Continuous Status as an Employee prior to the Purchase Date of a Purchase Period for
any reason, including retirement or death, the Contributions credited to his or her account will be returned to him or her or,
in the case of his or her death, to the person or persons entitled thereto under Section 13, and his or her option will be automatically
terminated. A participant will have up to 30 days to transfer, to himself, to a designated beneficiary, or to a designated broker,
any Shares that the Company or the Designated Broker holds for the benefit of the Participant (using a form that the Administrator
provides). If within 30 days, the participant’s Shares are not transferred, the Administrator may, but shall not be obligated
to, issue and mail a stock certificate for the Shares to the participant.

 

(c)               
In the event an Employee fails to remain in Continuous Status as an Employee of the Company for at least twenty (20) hours
per week during the Purchase Period in which the employee is a participant, he or she will be deemed to have elected to withdraw
from the Plan and the Contributions credited to his or her account will be returned to him or her and his or her option terminated.

 

(d)              
A participant’s withdrawal from a Purchase Period will result in his or her becoming ineligible to participate in
any Purchase Periods beginning within the next 12 months ( as well as being ineligible for the same period to participate in any
succeeding employee stock purchase plan or any similar plan which may hereafter be adopted by the Company and for which such participant
is otherwise eligible).

 

11.         
Interest. No interest shall accrue on the Contributions of a participant in the Plan.

 

12.         
Shares.

 

(a)               
On and after August 1, 2014, a total of 271,975 Shares shall be available for purchase pursuant to the Plan. Such Shares
may in the Administrator’s discretion be newly-issued Shares, Shares held in treasury, or Shares that the Designated Broker
shall purchase on the open market. To the extent the Purchase Price for Shares purchased on the open market is below Fair Market
Value for any Purchase Period, the Company shall pay the Designated Broker such amounts as are necessary to subsidize the Purchase
Price for Shares purchased on the open market.

 

(b)              
The participant shall have no interest (including no right to receive any dividends) or voting right in Shares covered by
his or her option until such option has been exercised.

 

(c)               
Shares to be delivered to a participant under the Plan will be registered in the name of the participant or, if directed
by the participant in writing, in the name of the participant and his or her spouse.

 

13.         
Administration. The Administrator shall
supervise and administer the Plan, and shall have full and exclusive discretionary authority to construe, interpret, and apply
the terms of the Plan, to determine eligibility, to adjudicate all disputed claims under the Plan, to adopt, amend and rescind
any rules deemed appropriate for the administration of the Plan, and to make all other determinations necessary or advisable for
the administration of the Plan. Every finding, decision, and determination made by the Administrator shall, to the full extent
permitted by law, be final and binding upon all parties. No person acting individually or jointly as the Administrator shall be
liable for any action or determination made in good faith with respect to the Plan or any participant.

 

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14.         
Designation of Beneficiary.

 

(a)               
A participant may designate a beneficiary who is
to receive any Shares and cash, if any, from the participant's account under the Plan in the event of such participant's death
subsequent to the end of a Purchase Period but prior to delivery to him or her of such Shares and cash. In addition, a participant
may designate a beneficiary who is to receive any cash from the Participant's account under the Plan in the event of such participant's
death prior to the Purchase Date. If a participant is married and the designated beneficiary is not the spouse, spousal consent
shall be required for such designation to be effective. Beneficiary designations under this Section 14(a) shall be made in the
form and in the manner as directed by the Company's Human Resources Department.

 

(b)               
Such designation of beneficiary may be changed by
the participant (and his or her spouse, if any) at any time by written notice in accordance with Section 14(a). In the event of
the death of a participant and in the absence of a beneficiary validly designated under the Plan who is living at the time of such
participant's death, the Company shall deliver such Shares and/or cash to the executor or administrator of the estate of the participant,
or if no such executor or administrator has been appointed (to the knowledge of the Company), the Company, in its discretion, may
deliver such Shares and/or cash to the spouse or to any one or more dependents or relatives of the participant, or if no spouse,
dependent or relative is known to the Company, then to such other person as the Company may designate.

 

15.         
Transferability. Neither Contributions
credited to a participant's account nor any rights with regard to the exercise of an option or to receive Shares under the Plan
may be assigned, transferred, pledged or otherwise disposed of in any way (other than by will, the laws of descent and distribution,
or as provided in Section 14) by the participant. Any such attempt at assignment, transfer, pledge or other disposition shall be
without effect, except that the Company may treat such act as an election to withdraw funds in accordance with Section 10.

 

16.         
Use of Funds. All Contributions received
or held by the Company under the Plan may be used by the Company for any corporate purpose, and the Company shall not be obligated
to segregate such Contributions.

 

17.         
Reports. Individual recordkeeping accounts
will be maintained for each participant in the Plan. Statements of account will be provided to participating Employees at least
annually by the Designated Broker, which statements will set forth the amounts of Contributions, the per Share Purchase Price,
the number of Shares purchased, and the remaining cash balance, if any.

 

18.         
Adjustments Upon Corporate Transactions.

 

(a)               
In the event of a proposed dissolution or liquidation
of the Company, any Purchase Period then in progress will terminate immediately prior to the consummation of such action, unless
otherwise provided by the Board. In the event of a Corporate Transaction, each option outstanding under the Plan shall be assumed
or an equivalent option shall be substituted by the successor corporation or a parent or Subsidiary of such successor corporation.
In the event that the successor corporation refuses to assume or substitute for outstanding options, each Purchase Period then
in progress shall be shortened and a new Purchase Date shall be set (the "New Purchase Date”), as of which date
any Purchase Period then in progress will terminate. The New Purchase Date shall be on or before the date of consummation of the
transaction and the Board shall notify each participant in writing, at least ten (10) days prior to the New Purchase Date, that
the Purchase Date for his or her option has been changed to the New Purchase Date and that his or her option will be exercised
automatically on the New Purchase Date, unless prior to such date he or she has withdrawn from the Purchase Period as provided
in Section 10.

 

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For purposes of this Section 18, an option
granted under the Plan shall be deemed to be assumed, without limitation, if, at the time of issuance of the stock or other consideration
upon a Corporate Transaction, each holder of an option under the Plan would be entitled to receive upon exercise of the option
the same number and kind of shares of stock or the same amount of property, cash or securities as such holder would have been entitled
to receive upon the occurrence of the transaction if the holder had been, immediately prior to the transaction, the holder of the
number of Shares covered by the option at such time (after giving effect to any adjustments in the number of Shares covered by
the option as provided for in this Section 18); provided, however, that if the consideration received in the transaction is not
solely common stock of the successor corporation or its parent (as defined in Section 424(e) of the Code), the Board may, with
the consent of the successor corporation, provide for the consideration to be received upon exercise of the option to be solely
common stock of the successor corporation or its parent equal in Fair Market Value to the per Share consideration received by holders
of Common Shares in the transaction.

 

The Board may, if it so determines in
the exercise of its sole discretion, also make provision for adjusting the Reserves, as well as the price per Common Share covered
by each outstanding option, in the event that the Company effects one or more reorganizations, recapitalizations, rights offerings,
or other increases or reductions of its outstanding Common Shares, and in the event of the Company's being consolidated with or
merged into any other corporation.

 

19.         
Amendment or Termination.

 

(a)               
The Board may at any time and for any reason terminate
or amend the Plan. Except as provided in Section 18, no such termination of the Plan may affect options previously granted, provided
that the Plan or a Purchase Period may be terminated by the Board on a Purchase Date or by the Board's setting a new Purchase Date
with respect to a Purchase Period then in progress if the Board determines that termination of the Plan and/or the Purchase Period
is in the best interests of the Company and the shareholders, or if continuation of the Plan and/or the Purchase Period would cause
the Company to incur adverse accounting charges as a result of a change after the effective date of the Plan in the generally accepted
accounting rules applicable to the Plan. Except as provided in Section 18 and in this Section 19, no amendment to the Plan shall
make any change in any option previously granted that adversely affects the rights of any participant. In addition, to the extent
the Administrator considers it appropriate to conform the Plan with Rule 16b-3 under the Exchange Act, Section 423 of the Code,
or any other applicable law, regulation, or stock exchange rule, the Company shall obtain stockholder approval in such a manner
and to such a degree as so required.

 

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(b)               
Without shareholder consent
and without regard to whether any participant rights may be considered to have been adversely affected, the Board (or its committee)
shall be entitled to change the Purchase Periods, to limit the frequency and/or number of changes in the amount withheld during
a Purchase Period, to establish the exchange ratio applicable to amounts withheld in a currency other than U.S. dollars, to permit
payroll withholding in excess of the amount designated by a participant in order to adjust for delays or mistakes in the Company's
processing of properly completed withholding elections, to establish reasonable waiting and adjustment periods and/or accounting
and crediting procedures to ensure that amounts applied toward the purchase of Common Shares for each participant properly correspond
with amounts withheld from the participant's Compensation, and to establish such other limitations or procedures as the Board (or
its committee) determines in its sole discretion advisable that are consistent with the Plan.

 

(c)               
The Company may adopt rules or procedures relating
to the operation and administration of the Plan to accommodate the specific requirements of local laws and procedures. Without
limiting the generality of the foregoing, the Company specifically authorizes the Administrator to adopt rules and procedures regarding
handling of payroll deductions, payment of interest, conversion of local currency, payroll tax, withholding procedures and handling
of stock certificates which vary with local requirements.

 

(d)               
The Administrator may also adopt sub-plans applicable
to particular Subsidiaries, or locations, which sub-plans may be designed to be outside the scope of Code Section 423. The rules
of such sub-plans may take precedence over other provisions of this Plan, but unless otherwise superseded by the specific terms
of such sub-plan, the provisions of this Plan shall govern the operation of such sub-plan. In addition, the Administrator may adopt
rules or procedures relating to the operation and administration of the Plan to accommodate the specific requirements of local
laws and procedures. Without limiting the generality of the foregoing, the Company is specifically authorized to adopt rules and
procedures regarding handling of payroll deductions, payment of interest, conversion of local currency, payroll tax, withholding
procedures and handling of stock certificates which vary with local requirements.

 

20.         
Notices. All notices
or other communications by a participant to the Company under or in connection with the Plan shall be deemed to have been duly
given when received in the form specified by the Company at the location, or by the person, designated by the Company for the
receipt thereof.

 

21.         
Conditions Upon Issuance of Shares. Shares
shall not be issued with respect to an option unless the exercise of such option and the issuance and delivery of such Shares pursuant
thereto shall comply with all applicable provisions of law, domestic or foreign, including, without limitation, the Securities
Act of 1933, as amended, the Exchange Act, the rules and regulations promulgated thereunder, applicable state securities laws,
and the requirements of any stock exchange upon which the Shares may then be listed, and shall be further subject to the approval
of counsel for the Company with respect to such compliance.

 

As a condition to the exercise of an option,
the Company may require the person exercising such option to represent and warrant at the time of any such exercise that the Shares
are being purchased only for investment and without any present intention to sell or distribute such Shares if, in the opinion
of counsel for the Company, such a representation is required by any of the aforementioned applicable provisions of law.

 

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22.         
Term of Plan; Effective Date. The Plan
shall amend, restate, and supersede the Company’s 2005 Employee Stock Purchase Plan (as originally effective January 1, 2005),
with this Plan’s amendment and restatement being effective on August 1, 2014, provided that this Plan receives approval,
before expiration would otherwise have occurred in 2015 pursuant to the plan’s original terms, by a vote of a majority of
the votes cast at a duly held annual meeting of the Company’s shareholders (or by such other shareholder vote that the Administrator
determines to be sufficient for the issuance of Shares or stock options according to the Company’s governing documents and
applicable state law). The Plan shall continue in effect for a term of ten (10) years from August 1, 2014 unless sooner terminated
under Section 19. If the shareholder approval condition referenced herein is not satisfied, then the terms and conditions of the
Company’s 2005 Employee Stock Purchase Plan, as in effect immediately before this amendment and restatement, shall be reinstated
and shall solely govern and control all matters (including all share purchases) arising under the plan.

 

23.         
Additional Restrictions of Rule 16b-3.
The terms and conditions of options granted hereunder to, and the purchase of Shares by, persons subject to Section 16 of the
Exchange Act shall comply with the applicable provisions of Rule 16b-3. This Plan shall be deemed to contain, and such options
shall contain, and the Shares issued upon exercise thereof shall be subject to, such additional conditions and restrictions as
may be required by Rule 16b-3 to qualify for the maximum exemption from Section 16 of the Exchange Act with respect to Plan transactions.

 

24.         
Notice of Disqualifying Dispositions.
By electing to participate in the Plan, each participant agrees to notify the Company in writing immediately after the participant
sells, transfers or otherwise disposes of any Shares acquired under the Plan, if such disposition occurs within the earlier of
(i) two (2) years of the Offering Date, or (ii) one (1) year of the Purchase Date, associated with such Shares. Each participant
further agrees to provide any information about a disposition of Shares as may be requested by the Company to assist it in complying
with any applicable tax laws.

 

25.         
Withholding of Taxes. Each participant
must make adequate provision for all applicable federal, state, or other tax withholding obligations which may arise upon the exercise
of any option or the disposition of any Shares.

 

26.         
No Employment Rights. The Plan does
not create, directly or indirectly, any right for the benefit of any employee or class of employees to purchase any Shares from
the Company (other than as expressly provided in, and subject to the terms and conditions of, the Plan), or create in any employee
or class of employees any right with respect to continuation of employment by the Company or any Subsidiary, and it shall not be
deemed to interfere in any way with the Company's or any Subsidiary's right to terminate, or otherwise modify, an employee's employment
at any time.

 

27.         
Offsets. To the extent permitted by
law, the Company shall have the absolute right to withhold any amounts payable to any participant under the terms of the Plan to
the extent of any amount owed for any reason by such participant to the Company or any Subsidiary and to set off and apply the
amounts so withheld to payment of any such amount owed to the Company or any Subsidiary, whether or not such amount shall then
be immediately due and payable and in such order or priority as among such amounts owed as the Board or its committee, in its sole
discretion, shall determine.

 

28.         
Captions. The captions of the sections
and paragraphs of this Plan have been inserted solely as a matter of convenience and in no way define or limit the scope or intent
of any provision of the Plan. References to sections herein are to the specified sections of this Plan unless another reference
is specifically stated. Wherever used herein, a singular number shall be deemed to include the plural unless a different meaning
is required by the context.

 

29.         
Governing Law. The internal laws of
the Commonwealth of Virginia shall govern all matters relating to this Plan except to the extent superseded by the laws of the
United States.

 

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EXHIBIT A

 

VERSAR INC.

 

2005 AMENDED AND RESTATED 

EMPLOYEE STOCK PURCHASE PLAN

 

SUBSCRIPTION AGREEMENT

 

 

____ Original Application Enrollment                                                                                  Date:______________________

____ Change in Payroll Deduction Rate

____ Change of Beneficiary(ies)

 

 

1.     _____________________________________
hereby elects to participate in the Versar Inc. 2005 Amended and Restated Employee Stock Purchase Plan (the “2005 Employee
Stock Purchase Plan”), and subscribes to purchase Common Shares of the Company in accordance with this Subscription Agreement
and the 2005 Employee Stock Purchase Plan.

 

2.     I hereby authorize
payroll deductions from each paycheck in the amount of ______________(minimum $25 per paycheck) of my Compensation on each payday
(not to exceed 25%) during the Purchase Period in accordance with the 2005 Employee Stock Purchase Plan. (Please note that
no fractional percentages are permitted.)

 

3.     I understand
that said payroll deductions shall be accumulated for the purchase of Common Shares at the applicable Purchase Price determined
in accordance with the 2005 Employee Stock Purchase Plan. I understand that if I do not withdraw from a Purchase Period, any accumulated
payroll deductions will be used to automatically exercise my option.

 

4.     I have received
a copy of the complete “2005 Employee Stock Purchase Plan.” I understand that my participation in the 2005 Employee
Stock Purchase Plan is in all respects subject to the terms of the Plan. I understand that the grant of the option by the Company
under this Subscription Agreement may be subject to obtaining stockholder approval of the 2005 Employee Stock Purchase Plan.

 

5.     Shares purchased
for me under the 2005 Employee Stock Purchase Plan should be issued in the name(s) of (Employee or Employee and Spouse Only): ____________________________________________.

 

6.     I understand
that if I dispose of any shares received by me pursuant to the Plan within 2 years after the Enrollment Date (the first day of
the Purchase Period during which I purchased such shares) or one year from the Purchase Date whichever is earlier, I will be treated
for Federal income tax purposes as having received ordinary income at the time of such disposition in an amount equal to the excess
of the fair market value of the shares at the time such shares were purchased by me over the price which I

paid for the shares.

 

    	11

    	 

    

 

   I HEREBY AGREE
TO NOTIFY THE COMPANY IN WRITING WITHIN 30 DAYS AFTER THE DATE OF ANY DISPOSITION OF SHARES AND I WILL MAKE ADEQUATE PROVISION
FOR FEDERAL, STATE OR OTHER TAX WITHHOLDING OBLIGATIONS, IF ANY, WHICH ARISE UPON THE DISPOSITION OF THE COMMON STOCK. The Company
may, but will not be obligated to, withhold from my compensation the amount necessary to meet any applicable withholding obligation
including any withholding necessary to make available to the Company any tax deductions or benefits attributable to sale or early
disposition of Common Shares by me. If I dispose of such shares at any time after the expiration of the 2-year holding period,
I understand that I will be treated for Federal income tax purposes as having received income only at the time of such disposition,
and that such income will be taxed as ordinary income only to the extent of an amount equal to the lesser of (1) the excess of
the fair market value of the shares at the time of such disposition over the purchase price which I paid for the shares, or (2)
5% of the fair market value of the shares on the last day of the Purchase Period. The remainder of the gain, if any, recognized
on such disposition will be taxed as capital gain. I UNDERSTAND THAT NOTHING IN THIS AGREEMENT CONSTITUTES TAX ADVICE, AND I ACKNOWLEDGE
THAT THE COMPANY HAS ENCOURAGED ME TO CONSULT MY OWN TAX ADVISOR WITH REGARD TO THE TAX CONSEQUENCES OF PARTICIPATING IN THE 2005
EMPLOYEE STOCK PURCHASE PLAN.

 

7.     I hereby agree
to be bound by the terms of the 2005 Employee Stock Purchase Plan. The effectiveness of this Subscription Agreement is dependent
upon my eligibility to participate in the 2005 Employee Stock Purchase Plan.

 

8.     In the event of my death, I hereby
designate the following as my beneficiary(ies) to receive all payments and Shares due me under the 2005 Employee Stock Purchase
Plan:

 

	NAME: 	 	 
	 	 	 
	 	 	(First)      (Middle)     (Last)
	 	 	 
	 	 	 
	Relationship	 	 
	 	 	 
	 	 	(Address)
	 	 	 
	NAME: 	 	 
	 	 	 
	 	 	(First)      (Middle)     (Last)
	 	 	 
	 	 	 
	Relationship	 	 
	 	 	 
	 	 	(Address)

 

I UNDERSTAND THAT THIS
SUBSCRIPTION AGREEMENT SHALL REMAIN IN EFFECT THROUGHOUT SUCCESSIVE PURCHASE PERIODS UNLESS TERMINATED BY ME AND CONFIRM THAT THE
FOLLOWING INFORMATION IS TRUE AND CORRECT.

 

 

	Employee’s Social	 	 
	Security Number:	 	 
	 	 	 	 
	Employee’s Address:	 	 
	 	 	 	 
	 	 	 	 
	 	 	 	 
	 	 	 	 
	 	 	 	 
	Dated: 	 	 	 
	 	 	 	Signature of Employee
	 	 	 	 
	 	 	 	 
	 	 	 	 
	 	 	 	 
	 	 	 	Spouse’s Signature
	 	 	 	(If beneficiary other than spouse)

 

    	12

    	 

    

 

EXHIBIT B

 

2005 AMENDED AND RESTATED EMPLOYEE STOCK
PURCHASE PLAN

 

NOTICE OF WITHDRAWAL

 

 

The undersigned participant
in the Purchase Period of the Versar Inc. 2005 Amended and Restated Employee Stock Purchase Plan which began on ____________________,
20_____ (the “Enrollment Date”) hereby notifies the Company that he or she hereby withdraws from the participation
in the 2005 Amended and Restated Employee Stock Purchase Plan for the Purchase Period. He or she hereby directs the Company to
pay to the undersigned as promptly as practicable all the payroll deductions which has not yet used to exercise the options be
credited to his or her account with respect to such Purchase Period. The undersigned understands and agrees that his or her option
for such Purchase Period will be automatically terminated.

 

The undersigned understands
further that no further payroll deductions will be made for the purchase of shares in the current Purchase Period and the undersigned
shall be eligible to participate in succeeding Purchase Periods only by delivering to the Company a new Subscription Agreement
for a Purchase Period beginning at least one year after the date of this withdrawal.

 

 

	 	Name and Address of Participant:	 
	 	 	 	 
	 	 	 
	 	 	 	 
	 	 	 
	 	 	 	 
	 	 	 
	 	 	 	 
	 	 	 	 
	 	Signature:	 
	 	 	 	 
	 	 	 
	 	 	 	 
	 	Date: 	 	 

 

 

    	13EX-4.1

 Exhibit 4.1 

SORRENTO THERAPEUTICS, INC. 
 and

 PHILADELPHIA STOCK TRANSFER, INC., 

Rights Agent 
 Amended and Restated

 Rights Agreement 
 Dated as
of December 22, 2014 

  
 1 

 TABLE OF CONTENTS 
  

							
	 	 	 	  	Page	 
	 Section 1.
	 	 Certain Definitions
	  	 	5	 
	 Section 2.
	 	 Appointment of Rights Agent
	  	 	8	 
	 Section 3.
	 	 Issuance of Rights Certificates
	  	 	9	 
	 Section 4.
	 	 Form of Rights Certificates
	  	 	10	 
	 Section 5.
	 	 Countersignature and Registration
	  	 	11	 
	 Section 6.
	 	 Transfer, Split Up, Combination and Exchange of Rights Certificates; Mutilated, Destroyed, Lost or Stolen Rights
Certificates
	  	 	11	 
	 Section 7.
	 	 Exercise of Rights; Purchase Price; Expiration Date of Rights
	  	 	12	 
	 Section 8.
	 	 Cancellation and Destruction of Rights Certificates
	  	 	13	 
	 Section 9.
	 	 Reservation and Availability of Capital Stock
	  	 	13	 
	 Section 10.
	 	 Preferred Stock Record Date
	  	 	14	 
	 Section 11.
	 	 Adjustment of Purchase Price, Number and Kind of Shares or Number of Rights
	  	 	15	 
	 Section 12.
	 	 Certificate of Adjusted Purchase Price or Number of Shares
	  	 	19	 
	 Section 13.
	 	 Consolidation, Merger or Sale or Transfer of Assets, Cash Flow or Earning Power
	  	 	20	 
	 Section 14.
	 	 Fractional Rights and Fractional Shares
	  	 	21	 
	 Section 15.
	 	 Rights of Action
	  	 	22	 
	 Section 16.
	 	 Agreement of Rights Holders
	  	 	22	 
	 Section 17.
	 	 Rights Certificate Holder Not Deemed a Stockholder
	  	 	23	 
	 Section 18.
	 	 Concerning the Rights Agent
	  	 	23	 
	 Section 19.
	 	 Merger or Consolidation or Change of Name of Rights Agent
	  	 	24	 
	 Section 20.
	 	 Duties of Rights Agent
	  	 	24	 
	 Section 21.
	 	 Change of Rights Agent
	  	 	26	 
	 Section 22.
	 	 Issuance of New Rights Certificates
	  	 	26	 
	 Section 23.
	 	 Redemption and Termination
	  	 	26	 
	 Section 24.
	 	 Exchange
	  	 	27	 
	 Section 25.
	 	 Notice of Certain Events
	  	 	28	 
	 Section 26.
	 	 Notices
	  	 	29	 
	 Section 27.
	 	 Supplements and Amendments
	  	 	29	 
	 Section 28.
	 	 Successors
	  	 	29	  
	 Section 29.
	 	 Determinations and Actions by the Board, etc.
	  	 	30	 
	 Section 30.
	 	 Benefits of this Agreement
	  	 	30	 
	 Section 31.
	 	 Severability
	  	 	30	 
	 Section 32.
	 	 Governing Law
	  	 	30	 
	 Section 33.
	 	 Counterparts
	  	 	30	 
	 Section 34.
	 	 Descriptive Headings; Interpretation
	  	 	30	 
	 Section 35.
	 	 Force Majeure
	  	 	31	 
	 Section 36.
	 	 Patriot Act
	  	 	31	 

  
 2 

 EXHIBITS 
  

			
	Exhibit A —	  	Form of Certificate of Designation, Preferences and Rights of Series A Junior Participating Preferred Stock
		
	Exhibit B —	  	Form of Rights Certificate
		
	Exhibit C —	  	Form of Summary of Rights

  
 3 

 RIGHTS AGREEMENT 

THIS AMENDED AND RESTATED RIGHTS AGREEMENT (the “Agreement”) dated as of December 22, 2014, by and between Sorrento
Therapeutics, Inc., a Delaware corporation (the “Company”), and Philadelphia Stock Transfer, Inc., as rights agent (the “Rights Agent”), amends and restates the Rights Agreement, dated November 7, 2013 (the “Original
Agreement”), by and between the Company and Computershare Trust Company, N.A., a federally chartered trust company, the original rights agent (the “Original Rights Agent”). 

W I T N E S S E T H 

WHEREAS, on November 7, 2013 (the “Rights Dividend Declaration Date”), the Board of Directors of the Company (the
“Board”) authorized and declared a dividend distribution of one Right (as hereinafter defined) for each share of Common Stock (as hereinafter defined) outstanding at the close of business on November 18, 2013 (the “Record
Date”), and has authorized the issuance of one Right (as such number may hereinafter be adjusted pursuant to the provisions of Section 11(p) hereof) for each share of Common Stock issued (whether as an original issuance or from the
Company’s treasury) between the Record Date and the Distribution Date (as hereinafter defined) and in certain circumstances provided herein, each Right initially representing the right to purchase one one-thousandth of a share of the Preferred
Stock of the Company having the rights, powers and preferences set forth in the form of Certificate of Designation, Preferences and Rights attached hereto as Exhibit A, upon the terms and subject to the conditions hereinafter set forth (the
“Rights”). 
 WHEREAS, Section 21 of the Original Agreement states that the Original Rights Agent will resign automatically
in the event the transfer agency relationship in effect between the Company and the Original Rights Agent terminates; 
 WHEREAS, the
Rights Agent is currently the transfer agent for the Company’s securities; 
 WHEREAS, the Company has entered into a securities
purchase agreement, dated as of December 14, 2014 (as amended from time to time, the “Purchase Agreement”), by and among Cambridge Equities, LP, (“Purchaser”) and the Company; 

WHEREAS, pursuant to the Purchase Agreement, the Company agreed to issue and sell to the Purchaser (i) an aggregate of 7,188,061 shares
(the “Shares”) of the Company’s common stock (the “Common Stock”) at a price of $5.80 per share, and (ii) a three-year warrant to purchase 1,724,138 shares of the Company’s Common Stock at an initial exercise price
of $5.80 per share (the “Warrant” and together with the Shares, the “Securities”), for an aggregate purchase price of $41,742,477.94; 

WHEREAS, the Board of Directors of the Company has determined that the Purchase Agreement and the terms and conditions set forth therein and
the transactions contemplated thereby, including, without limitation, the sale of the Securities, are advisable and are fair to and in the best interests of the Company and its stockholders; 

WHEREAS, the Board of Directors of the Company has determined, in connection with the execution of the Purchase Agreement, that it is
desirable to amend and restate the Rights Agreement to exempt the Purchase Agreement and the transactions contemplated thereby, including, without limitation, the Cambridge LP Acquisition (as defined below), from the application of the Rights
Agreement as set forth in this Amendment; 
 WHEREAS, Section 27 of the Rights Agreement provides that, prior to the Distribution Date
(as defined in the Rights Agreement), the Company and the Rights Agent shall, if the Company so directs, supplement or amend any provision of the Rights Agreement without the approval of any holders of certificates representing shares of Common
Stock of the Company upon delivery of a certificate from an appropriate officer of the Company which states that the proposed supplement or amendment is in compliance with the terms of Section 27 of the Rights Agreement, provided that the
Rights Agreement may not be amended at a time when the Rights (as defined in the Rights Agreement) are not redeemable; 
 WHEREAS, there has
been no such Distribution Date as of the time immediately prior to this Amendment, and the Rights are redeemable as of the date of this Amendment; and 

WHEREAS, pursuant to the terms of the Rights Agreement and in accordance with Section 27 thereof, the Company has directed that the
Rights Agreement should be amended as set forth in this Amendment prior to the closing of the Purchase 

  
 4 

 
Agreement and has delivered a certificate that this Amendment is in compliance with the terms of Section 27 of the Rights Agreement. 

NOW, THEREFORE, in consideration of the premises and the mutual agreements herein set forth, the parties hereby agree to amend and restate the
Original Agreement as follows: 
 Section 1. Certain Definitions. For purposes of this Agreement, the following terms have the
meanings indicated: 
 “Acquiring Person” shall mean any Person who or which, together with all Affiliates and Associates of such
Person, shall be the Beneficial Owner of fifteen percent (15%) or more of the shares of Common Stock then outstanding, but shall not include (i) the Company, (ii) any Subsidiary of the Company, (iii) any employee benefit plan of
the Company, or of any Subsidiary of the Company, or any Person or entity organized, appointed or established by the Company for or pursuant to the terms of any such plan, (iv) any Person who becomes the Beneficial Owner of 15% or more of the
shares of Common Stock then outstanding as a result of a reduction in the number of shares of Common Stock outstanding due to the repurchase of shares of Common Stock by the Company (or any Subsidiary of the Company, any employee benefit plan of the
Company or of any Subsidiary of the Company, or any Person or entity organized, appointed or established by the Company for or pursuant to the terms of any such plan) unless and until such Person, after becoming aware that such Person has become the
Beneficial Owner of 15% or more of the then outstanding shares of Common Stock, acquires beneficial ownership of additional shares of Common Stock representing one percent (1%) or more of the shares of Common Stock then outstanding,
(v) any such Person who has reported or is required to report such ownership (but less than 20%) on Schedule 13G under the Exchange Act (or any comparable or successor report) or on Schedule 13D under the Exchange Act (or any comparable or
successor report) which Schedule 13D does not state any intention to or reserve the right to control or influence the management or policies of the Company or engage in any of the actions specified in Item 4 of such schedule (other than the
disposition of the Common Stock) and, within 10 Business Days of being requested by the Company to advise it regarding the same, certifies to the Company that such Person acquired shares of Common Stock in excess of 14.99% inadvertently or without
knowledge of the terms of the Rights and who or which, together with all Affiliates and Associates, thereafter reduces such Person’s, together with its Affiliates’ and Associates’, Beneficial Ownership to less than 15% of the shares
of Common Stock then outstanding; provided, however, that if the Person requested to so certify fails to do so within ten (10) Business Days or breaches or violates such certification, then such Person shall become an Acquiring
Person immediately after such 10 Business Day period or such breach or violation, or (vi) an Exempt Person, but only for so long as such Exempt Person, together with such Person’s Affiliates and Associates, does not become the Beneficial
Owner of any additional shares of Common Stock while such Person is an Exempt Person. Notwithstanding anything in this Agreement to the contrary, none of Cambridge Equities, LP. or any Affiliate or Associate of either shall be deemed to be an
Acquiring Person or a Beneficial Owner of Common Stock, either individually or collectively, solely as a result of (i) the approval, execution, delivery, announcement or performance of the Purchase Agreement; (ii) the consummation of the
Cambridge LP Acquisition or any of the other transactions contemplated in the Purchase Agreement or (iii) the exercise of the warrant issued to the Investor pursuant to the Purchase Agreement. 

(b) “Act” shall mean the Securities Act of 1933, as amended. 

(c) “Adjustment Shares” shall have the meaning set forth in Section 11(a)(ii) hereof. 

(d) “Affiliate” and “Associate” shall have the respective meanings ascribed to such terms in Rule 12b-2 of the General
Rules and Regulations under the Exchange Act. 
 (e) “Agreement” shall have the meaning set forth in the preamble to this
Agreement. 
 (f) A Person shall be deemed the “Beneficial Owner” of, and shall be deemed to “beneficially own,” any
securities: 
 (i) that such Person or any of such Person’s Affiliates or Associates, directly or indirectly, owns or
has the right to acquire (whether such right is exercisable immediately or only after the passage of time or upon the satisfaction of one or more conditions (whether or not within the control of such Person), compliance with regulatory requirements
or otherwise) pursuant to any agreement, arrangement or understanding (whether or not in writing) or upon the exercise of conversion rights, exchange rights, other rights, warrants or options, or otherwise; provided, however, that a
Person shall not 

  
 5 

 
be deemed the “Beneficial Owner” of, or to “beneficially own,” (A) securities tendered pursuant to a tender or exchange offer made by such Person or any of such
Person’s Affiliates or Associates until such tendered securities are accepted for purchase or exchange, (B) securities issuable upon exercise of Rights at any time prior to the occurrence of a Triggering Event, or (C) securities
issuable upon exercise of Rights from and after the occurrence of a Triggering Event which Rights were acquired by such Person or any of such Person’s Affiliates or Associates prior to the Distribution Date or pursuant to Section 3(a) or
Section 22 hereof (the “Original Rights”) or pursuant to Section 11(a)(i) hereof in connection with an adjustment made with respect to any Original Rights; 

(ii) that such Person or any of such Person’s Affiliates or Associates, directly or indirectly, has the right to vote or
dispose of or has “beneficial ownership” of (as determined pursuant to Rule 13d-3 of the General Rules and Regulations under the Exchange Act), including pursuant to any agreement, arrangement or understanding, whether or not in writing;
provided, however, that a Person shall not be deemed the “Beneficial Owner” of, or to “beneficially own,” any security under this subparagraph (ii) as a result of an agreement, arrangement or understanding to
vote such security if such agreement, arrangement or understanding: (A) arises solely from a revocable proxy given in response to a public proxy or consent solicitation made pursuant to, and in accordance with, the applicable provisions of the
General Rules and Regulations under the Exchange Act, and (B) is not reportable by such Person on Schedule 13D under the Exchange Act (or any comparable or successor report); 

(iii) that are beneficially owned, directly or indirectly, by any other Person (or any Affiliate or Associate thereof) with
which such Person (or any of such Person’s Affiliates or Associates) has any agreement, arrangement or understanding (whether or not in writing), for the purpose of acquiring, holding, voting (except pursuant to a revocable proxy as described
in the proviso to subparagraph (ii) of this paragraph (f)) or disposing of any voting securities of the Company; or 

(iv) that are the subject of a derivative transaction entered into by such Person or any of such Person’s Affiliates or
Associates, including, for these purposes, any derivative security acquired by such Person or any of such Person’s Affiliates or Associates, that gives such Person or any of such Person’s Affiliates or Associates the economic equivalent of
ownership of an amount of such securities due to the fact that the value of the derivative is explicitly determined by reference to the price or value of such securities, or which provides such Person or any of such Person’s Affiliates or
Associates an opportunity, directly or indirectly, to profit, or to share in any profit, derived from any change in the value of such securities, in any case without regard to whether (a) such derivative conveys any voting rights in such
securities to such Person or any of such Person’s Affiliates or Associates, (b) the derivative is required to be, or capable of being, settled through delivery of such securities, or (c) such Person or any of such Person’s
Affiliates or Associates may have entered into other transactions that hedge the economic effect of such derivative. In determining the number of shares of Common Stock “beneficially owned” by virtue of the operation of this
Section 1(f)(iv), the subject Person shall be deemed to “beneficially own” (without duplication) the notional or other number of shares of Common Stock specified in the documentation evidencing the derivative position as being subject
to be acquired upon the exercise or settlement of the applicable right or as the basis upon which the value or settlement amount of such right, or the opportunity of the holder of such right to profit or share in any profit, is to be calculated in
whole or in part, and in any case (or if no such number of shares of Common Stock is specified in such documentation or otherwise), as determined by the Board in good faith to be the number of shares of Common Stock to which the derivative position
relates; 
 provided, however, that nothing in this paragraph (f) shall cause a Person engaged in business as an underwriter of
securities to be the “Beneficial Owner” of, or to “beneficially own,” any securities acquired through such Person’s participation in good faith in a firm commitment underwriting until the expiration of forty days
(40) after the date of such acquisition, and then only if such securities continue to be owned by such Person at such expiration of forty (40) days. 

(g) “Board” shall have the meaning set forth in the recitals of this Agreement. 

(h) “Business Day” shall mean any day other than a Saturday, Sunday or a day on which banking institutions in the State of New
York, or the state in which the principal office of the Rights Agent is located, are authorized or obligated by law or executive order to close. 

(i) “close of business” on any given date shall mean 5:00 P.M., New York City time, on such date; provided, however,
that if such date is not a Business Day, it shall mean 5:00 P.M., New York City time, on the next succeeding Business Day. 

  
 6 

 (j) “Common Stock” shall mean the common stock, par value $0.0001 per share, of the
Company, except that “Common Stock” when used with reference to any Person other than the Company shall mean the capital stock of such Person with the greatest voting power, or the equity securities or other equity interest having power to
control or direct the management, of such Person. 
 (k) “Common Stock Equivalents” shall have the meaning set forth in
Section 11(a)(iii) hereof. 
 (l) “Company” shall have the meaning set forth in the preamble to this Agreement. 

(m) “Current Market Price” shall have the meaning set forth in Section 11(d)(i) hereof. 

(n) “Current Value” shall have the meaning set forth in Section 11(a)(iii) hereof. 

(o) “Customer Identification Program” shall have the meaning set forth in Section 36 hereof. 

(p) “Distribution Date” shall have the meaning set forth in Section 3(a) hereof. 

(q) “Equivalent Preferred Stock” shall have the meaning set forth in Section 11(b) hereof. 

(r) “Exempt Person” shall mean any Person who or which, together with all Affiliates and Associates of such Person, is, as of the
Exempt Time, the Beneficial Owner of 15% or more of the shares of Common Stock then outstanding. Notwithstanding anything to the contrary provided in this Agreement, any Exempt Person who, together with such Person’s Affiliates and Associates,
after the Exempt Time becomes the Beneficial Owner of less than 15% of the shares of Common Stock then outstanding shall cease to be an Exempt Person and shall be subject to all the provisions of this Agreement in the same manner as any Person who
is not and was not an Exempt Person. 
 (s) “Exempt Time” shall mean the time of the first public announcement of this Agreement.

 (t) “Exchange Act” shall mean the Securities Exchange Act of 1934, as amended. 

(u) “Exchange Ratio” shall have the meaning set forth in Section 24 hereof. 

(v) “Expiration Date” shall have the meaning set forth in Section 7(a) hereof. 

(w) “Final Expiration Date” shall have the meaning set forth in Section 7(a) hereof. 

(x) “NASDAQ” shall have the meaning set forth in Section 11(d)(i) hereof. 

(y) Intentionally omitted. 

(z) “Original Rights” shall have the meaning set forth in Section 1(f)(i) hereof. 

(aa) “Person” shall mean any individual, firm, corporation, partnership, limited liability company, trust, association, syndicate
or other entity and includes an unincorporated group of persons who, by formal or informal agreement or arrangement, have embarked on a common purpose or act. 

(bb) “Preferred Stock” shall mean shares of Series A Junior Participating Preferred Stock, with a par value of $0.0001 per share,
of the Company, and, to the extent that there are not a sufficient number of shares of Series A Junior Participating Preferred Stock, authorized to permit the full exercise of the Rights, any other series of preferred stock of the Company designated
for such purpose containing terms substantially similar to the terms of the Series A Junior Participating Preferred Stock. 
 (cc)
“Principal Party” shall have the meaning set forth in Section 13(b) hereof. 
 (dd) “Purchase Price” shall have
the meaning set forth in Section 4(a)(ii) hereof. 
 (ee) “Qualified Offer” shall have the meaning set forth in
Section 11(a)(ii) hereof. 
 (ff) “Record Date” shall have the meaning set forth in the recitals of this Agreement. 

(gg) “Redemption Price” shall have the meaning set forth in Section 23(a) hereof. 

  
 7 

 (hh) “Rights” shall have the meaning set forth in the recitals of this Agreement. 

(ii) “Rights Agent” shall have the meaning set forth in the preamble of this Agreement. 

(jj) “Rights Certificate” shall have the meaning set forth in Section 3(a) hereof. 

(kk) “Rights Dividend Declaration Date” shall have the meaning set forth in the recitals of this Agreement. 

(ll) “Section 11(a)(ii) Event” shall mean any event described in Section 11(a)(ii) hereof. 

(mm) “Section 11(a)(ii) Trigger Date” shall have the meaning set forth in Section 11(a)(ii) hereof. 

(nn) “Section 13 Event” shall mean any event described in clauses (x), (y) or (z) of Section 13(a) hereof. 

(oo) “Spread” shall have the meaning set forth in Section 11(a)(iii) hereof. 

(pp) “Stock Acquisition Date” shall mean the first date of public announcement (which, for purposes of this definition, shall
include a report filed or amended pursuant to Section 13(d) under the Exchange Act) by the Company or an Acquiring Person that an Acquiring Person has become such other than pursuant to a Qualified Offer. Notwithstanding anything in this
Agreement to the contrary, a Stock Acquisition Date shall not be deemed to have occurred solely as a result of (i) the approval, execution, delivery, announcement or performance of the Purchase Agreement; (ii) the consummation of the
Cambridge LP Acquisition or any of the other transactions contemplated in the Purchase Agreement or (iii) the exercise of the warrant issued to the Investor pursuant to the Purchase Agreement. 

(qq) “Subsidiary” shall mean, with reference to any Person, any corporation or other entity of which an amount of securities or
other ownership interests having ordinary voting power sufficient to elect at least a majority of the directors or other Persons having similar functions of such corporation or other entity are at the time, directly or indirectly, beneficially
owned, or otherwise controlled by such Person. 
 (rr) “Substitution Period” shall have the meaning set forth in
Section 11(a)(iii) hereof. 
 (ss) “Summary of Rights” shall have the meaning set forth in Section 3(b) hereof. 

(tt) “Trading Day” shall have the meaning set forth in Section 11(d)(i) hereof. 

(uu) “Triggering Event” shall mean any Section 11(a)(ii) Event or any Section 13 Event. Notwithstanding anything in this
Agreement to the contrary, a Triggering Event shall not be deemed to have occurred solely as a result of (i) the approval, execution, delivery, announcement or performance of the Purchase Agreement; (ii) the consummation of the Cambridge
LP Acquisition or any of the other transactions contemplated in the Purchase Agreement or (iii) the exercise of the warrant issued to the Investor pursuant to the Purchase Agreement. 

(vv) ‘Cambridge LP Acquisition’ shall mean the purchase and sale by the Investor of (i) an aggregate of 7,188,061 shares of
the Company’s Common Stock and (ii) a three-year warrant to purchase 1,724,138 shares of the Company’s Common Stock at an initial exercise price of $5.80 per share, for an aggregate purchase price of $41,690,754, in accordance with
the terms and conditions of the Purchase Agreement. 
 (ww) ‘Investor’ shall mean Cambridge Equities LP. 

(xx) ‘Purchase Agreement’ shall mean the Securities Purchase Agreement dated as of December 14, 2014 by and between Cambridge
Equities LP and the Company, as amended from time to time. 
 Section 2. Appointment of Rights Agent. The Company hereby
appoints the Rights Agent to act as agent for the Company in accordance with the express terms and conditions hereof (and no implied terms or conditions), and the Rights Agent hereby accepts such appointment. The Company may from time to time
appoint such co-rights agents as it may deem necessary or desirable, upon ten (10) days’ prior written notice to the Rights Agent. The Rights Agent shall have no duty to supervise, and in no event be liable for, the acts or omissions of
any such co-rights agent. In the event the Company appoints one or more co-rights agents, the respective duties of the Rights Agents and any co-rights agents shall be as the Company shall determine and the Company shall provide written notice
thereof to the Rights Agent. 

  
 8 

 Section 3. Issuance of Rights Certificates. 

(a) Until the earlier of (i) the close of business on the tenth Business Day after the Stock Acquisition Date (or, if the tenth Business
Day after the Stock Acquisition Date occurs before the Record Date, the close of business on the Record Date), or (ii) the close of business on the tenth Business Day (or such later date as the Board shall determine) after the date that a
tender or exchange offer by any Person (other than the Company, any Subsidiary of the Company, any employee benefit plan of the Company or of any Subsidiary of the Company, or any Person organized, appointed or established by the Company for or
pursuant to the terms of any such plan) is first published or sent or given within the meaning of Rule 14d-2(a) of the General Rules and Regulations under the Exchange Act, if upon consummation thereof, such Person would become an Acquiring Person,
in either instance other than pursuant to a Qualified Offer (the earlier of (i) and (ii) being herein referred to as the “Distribution Date”), (x) the Rights will be evidenced (subject to the provisions of paragraphs
(b) and (c) of this Section 3) by the certificates for the Common Stock registered in the names of the holders of the Common Stock (which certificates for Common Stock shall be deemed also to be certificates for Rights) and not by
separate certificates (or, for shares participating in the direct registration system, by notations in the respective book entry accounts for the Common Stock), and (y) the Rights will be transferable only in connection with the transfer of the
underlying shares of Common Stock (including a transfer to the Company). As soon as practicable after the Distribution Date, the Company will prepare and execute, the Rights Agent will countersign, and the Rights Agent will, if requested and
provided with all the necessary information, send by first class, insured, postage prepaid mail, to each record holder of the Common Stock as of the close of business on the Distribution Date, at the address of such holder shown on the records of
the Company, one or more rights certificates, in substantially the form of Exhibit B hereto (the “Rights Certificates”), evidencing one Right for each share of Common Stock so held, subject to adjustment as provided herein. To the extent
that a Triggering Event under Section 11(a)(ii) hereof has also occurred, the Company may implement such procedures, as it deems appropriate in its sole discretion, to minimize the possibility that Rights are received by Persons whose Rights
would be null and void under Section 7(e) hereof. In the event that an adjustment in the number of Rights per share of Common Stock has been made pursuant to Section 11(p) hereof, at the time of distribution of the Rights Certificates, the
Company shall make the necessary and appropriate rounding adjustments (in accordance with Section 14(a) hereof) so that Rights Certificates representing only whole numbers of Rights are distributed and cash is paid in lieu of any fractional
Rights. As of and after the Distribution Date, the Rights will be evidenced solely by such Rights Certificates, and the Right Certificates and the Rights will be transferable separately from the transfer of shares of Common Stock. The Company shall
promptly notify the Rights Agent in writing upon occurrence of a Distribution Date. Until such notice is received by the Rights Agent, the Rights Agent may presume conclusively for all purposes that a Distribution Date has not occurred.
Notwithstanding anything in this Agreement to the contrary, a Distribution Date shall not be deemed to have occurred solely as the result (i) the approval, execution, delivery, announcement or performance of the Purchase Agreement;
(ii) the consummation of the Cambridge LP Acquisition or any of the other transactions contemplated in the Purchase Agreement or (iii) the exercise of the warrant issued to the Investor pursuant to the Purchase Agreement. 

(b) The Company will make available, as promptly as practicable following the Record Date, a copy of a Summary of Rights, in substantially
the form attached hereto as Exhibit C (the “Summary of Rights”) to any holder of Rights who may so request from time to time prior to the Expiration Date. With respect to certificates for the Common Stock outstanding as of the Record Date,
or issued subsequent to the Record Date, unless and until the Distribution Date shall occur, the Rights will be evidenced by the certificates for the Common Stock (or, in the case of shares reflected on the direct registration system, the notations
in the book-entry account system of the transfer agent for the Common Stock), and the registered holders of the Common Stock shall also be the registered holders of the associated Rights. Until the earlier of the Distribution Date or the Expiration
Date, the transfer of any shares of Common Stock in respect of which Rights have been issued shall also constitute the transfer of the Rights associated with such shares of Common Stock. Notwithstanding anything to the contrary set forth in this
Agreement, upon the effectiveness of a redemption pursuant to Section 23 hereof or an exchange pursuant to Section 24 hereof, the Company shall not thereafter issue any additional Rights and, for the avoidance of doubt, no Rights shall be
attached to or shall be issued with any shares of Common Stock (including any shares of Common Stock issued pursuant to an exchange) at any time thereafter. 

(c) Rights shall be issued in respect of all shares of Common Stock that are issued (whether originally issued or delivered from the
Company’s treasury) after the Record Date but prior to the earlier of the Distribution Date or the Expiration Date or, in certain circumstances provided in Section 22 hereof, after the Distribution Date. Certificates representing such
shares of Common Stock shall also be deemed to be certificates for Rights, and shall bear a legend in substantially the following form if such certificates are issued after the Record Date but prior to the earlier of the Distribution Date or the
Expiration Date: 

  
 9 

 This certificate also evidences and entitles the holder hereof to certain Rights
as set forth in the Rights Agreement between Sorrento Therapeutics, Inc. (the “Company”) and the Rights Agent thereunder (the “Rights Agent”) dated as of November 7, 2013, as originally executed and as it may be amended or
restated from time to time (the “Rights Agreement”), the terms of which are hereby incorporated herein by reference and a copy of which is on file at the principal offices of the Company. Under certain circumstances, as set forth in the
Rights Agreement, such Rights will be evidenced by separate certificates and will no longer be evidenced by this certificate. The Company will mail to the holder of this certificate a copy of the Rights Agreement, as in effect on the date of
mailing, without charge, promptly after receipt of a written request therefor. Under certain circumstances set forth in the Rights Agreement, Rights issued to, or held by, any Person who is, was or becomes an Acquiring Person or any Affiliate or
Associate thereof (as such terms are defined in the Rights Agreement), whether currently held by or on behalf of such Person or by any subsequent holder, may become null and void. 

With respect to such certificates containing the foregoing legend, until the earlier of (i) the Distribution Date or (ii) the Expiration Date, the
Rights associated with the Common Stock represented by such certificates shall be evidenced by such certificates alone and registered holders of Common Stock shall also be the registered holders of the associated Rights, and the transfer of any of
such certificates shall also constitute the transfer of the Rights associated with the Common Stock represented by such certificates. Similarly, during such time periods, transfers of shares participating in the direct registration system shall also
be deemed to be transfers of the associated Rights. In the case of any shares participating in the direct registration system, the Company shall cause the transfer agent for the Common Stock to include on each direct registration account statement
with respect thereto issued prior to the Distribution Date a notation to the effect that the Company will mail to the stockholder a copy of the Agreement, as in effect on the date of mailing, without charge, promptly after receipt of a written
request therefor and that the recipient of the statement, as a holder of shares of Common Stock, may have certain rights thereunder. In the event that shares of the Common Stock are not represented by certificates, references in this Agreement to
certificates shall be deemed to refer to the notations in the book entry accounts reflecting ownership of such shares. 
 Section 4.
Form of Rights Certificates. 
 (a) The Rights Certificates (and the forms of election to purchase and of assignment to be printed
on the reverse thereof) shall each be substantially in the form set forth in Exhibit B hereto and may have such changes or marks of identification or designation and such legends, summaries or endorsements printed thereon as the Company may deem
appropriate (but which do not affect the rights, duties, responsibilities and liabilities of the Rights Agent) and as are not inconsistent with the provisions of this Agreement, or as may be required to comply with any applicable law or with any
rule or regulation made pursuant thereto or with any applicable rule or regulation of any stock exchange on which the Rights may from time to time be listed, or to conform to customary usage. Subject to the provisions of Section 11 and
Section 22 hereof, the Rights Certificates, whenever distributed, shall be dated as of the Record Date and on their face shall entitle the holders thereof to purchase such number of one one-thousandths of a share of Preferred Stock as shall be
set forth therein at the price set forth therein (such exercise price per one one-thousandth of a share, the “Purchase Price”), but the amount and type of securities purchasable upon the exercise of each Right and the Purchase Price
thereof shall be subject to adjustment as provided herein. 
 (b) Any Rights Certificate issued pursuant to Section 3(a),
Section 11(i) or Section 22 hereof that represents Rights beneficially owned by: (i) an Acquiring Person or any Associate or Affiliate of an Acquiring Person, (ii) a transferee of an Acquiring Person (or of any Associate or
Affiliate of an Acquiring Person) who becomes a transferee after the Acquiring Person becomes such, or (iii) a transferee of an Acquiring Person (or of any such Associate or Affiliate) who becomes a transferee prior to or concurrently with the
Acquiring Person becoming such and receives such Rights pursuant to either (A) a transfer (whether or not for consideration) from the Acquiring Person to holders of equity interests in such Acquiring Person or to any Person with whom such
Acquiring Person has any continuing agreement, arrangement or understanding (whether or not in writing) regarding the transferred Rights or (B) a transfer which the Board has determined is part of a plan, arrangement or understanding (whether
or not in writing) which has as a primary purpose or effect the avoidance of Section 7(e) hereof, and any Rights Certificate issued pursuant to Section 6 or Section 11 hereof upon transfer, exchange, replacement or adjustment of any
other Rights Certificate referred to in this sentence, shall contain (if the Company and the Rights Agent have knowledge that such Person is an Acquiring Person or an Associate or Affiliate thereof or transferee of such Persons or a nominee of any
of the foregoing and to the extent feasible) a legend in substantially the following form: 
 The Rights represented by this Rights
Certificate are or were beneficially owned by a Person who was or became an Acquiring Person or an Affiliate or Associate of an Acquiring Person (as such terms are defined in the Amended and Restated Rights Agreement between Sorrento Therapeutics,
Inc. and Philadelphia Stock Transfer, Inc., as rights agent, dated 

  
 10 

 
as of December 22, 2014 (the “Rights Agreement”)). Accordingly, this Rights Certificate and the Rights represented hereby may become null and void in the circumstances specified in
Section 7(e) of the Rights Agreement. 
 The Company shall instruct the Rights Agent in writing of the Rights which should be so legended. The Company
shall give written notice to the Rights Agent promptly after the Company becomes aware of the existence and identity of any Acquiring Person or any Associate or Affiliate thereof. Until such notice is received by the Rights Agent, the Rights Agent
may presume conclusively for all purposes that no Person has become an Acquiring Person or an Affiliate or an Associate of an Acquiring Person. 

Section 5. Countersignature and Registration. 

(a) The Rights Certificates shall be executed on behalf of the Company by its Chairman of the Board, its Chief Executive Officer, its
President or any Vice President, either manually or by facsimile signature, and shall have affixed thereto the Company’s seal or a facsimile thereof which shall be attested by the Secretary or an Assistant Secretary of the Company, either
manually or by facsimile signature. The Rights Certificates shall be countersigned by the Rights Agent, either manually or by facsimile signature, and shall not be valid for any purpose unless so countersigned. In case any officer of the Company who
shall have signed or attested any of the Rights Certificates shall cease to be such officer of the Company before countersignature by the Rights Agent and issuance and delivery by the Company, such Rights Certificates, nevertheless, may be
countersigned by the Rights Agent and issued and delivered by the Company with the same force and effect as though the person who signed or attested such Rights Certificates had not ceased to be such officer of the Company; and any Rights
Certificates may be signed or attested on behalf of the Company by any person who, at the actual date of the execution of such Rights Certificate, shall be a proper officer of the Company to sign or attest such Rights Certificate, although at the
date of the execution of this Agreement any such person was not such an officer. 
 (b) Following the Distribution Date, receipt by the
Rights Agent of written notice to that effect and all other relevant information referred to in Section 3(a) to this Agreement, the Rights Agent will keep, or cause to be kept, at its office or offices designated for such purposes, books for
registration and transfer of the Rights Certificates issued hereunder. Such books shall show the names and addresses of the respective holders of the Rights Certificates, the number of Rights evidenced on its face by each of the Rights Certificates
and the date of each of the Rights Certificates. 
 Section 6. Transfer, Split Up, Combination and Exchange of Rights Certificates;
Mutilated, Destroyed, Lost or Stolen Rights Certificates. 
 (a) Subject to the provisions of Section 4(b), Section 7(e) and
Section 14 hereof, at any time after the close of business on the Distribution Date, and at or prior to the close of business on the Expiration Date, any Rights Certificate or Certificates (other than Rights Certificates representing Rights
that may have been exchanged pursuant to Section 24 hereof) may be transferred, split up, combined or exchanged for another Rights Certificate or Certificates, entitling the registered holder to purchase a like number of one one-thousandths of
a share of Preferred Stock (or, following a Triggering Event, Common Stock, other securities, cash or other assets, as the case may be) as the Rights Certificate or Certificates surrendered then entitles such holder (or former holder in the case of
a transfer) to purchase. Any registered holder desiring to transfer, split up, combine or exchange any Rights Certificate or Certificates shall make such request in writing delivered to the Rights Agent, and shall surrender the Rights Certificate or
Certificates to be transferred, split up, combined or exchanged at the office or offices of the Rights Agent designated for such purpose. Notwithstanding anything in this Agreement to the contrary, neither the Rights Agent nor the Company shall be
obligated to take any action whatsoever with respect to the transfer of any such surrendered Rights Certificate until the registered holder thereof shall have properly completed and duly executed the certificate contained in the form of assignment
on the reverse side of such Rights Certificate, shall have provided such additional evidence of the identity of the Beneficial Owner (or former Beneficial Owner) or Affiliates or Associates thereof as the Company or the Rights Agent shall reasonably
request. Thereupon the Rights Agent shall, subject to Section 4(b), Section 7(e), Section 14 hereof and Section 24 hereof, countersign (by manual or facsimile signature) and deliver to the Person entitled thereto a Rights
Certificate or Rights Certificates, as the case may be, as so requested. The Company or the Rights Agent may require from the holders of the Rights Certificates payment of a sum sufficient to cover any tax or charge that may be imposed in connection
with any transfer, split up, combination or exchange of Rights Certificates. If and to the extent the Company does require payment of any such taxes or charges, the Company shall give the Rights Agent prompt written notice thereof and the Rights
Agent shall not deliver any Right Certificate unless and until it is satisfied that all such payments have been made, and the Rights Agent shall forward any such sum collected by it to the Company or to such Persons as the Company shall specify by
written notice. The Rights Agent shall have no 

  
 11 

 
duty or obligation to take any action under any section of this Agreement related to the issuance or delivery of Rights Certificates unless and until the Rights Agent is satisfied that all such
taxes and/or charges have been paid. 
 (b) Upon receipt by the Company and the Rights Agent of evidence reasonably satisfactory to them of
the loss, theft, destruction or mutilation of a Rights Certificate and such additional evidence of the identity of the Beneficial Owner (or former Beneficial Owner) or Affiliates or Associates thereof as the Company or the Rights Agent shall
reasonably request, and, in case of loss, theft or destruction, of indemnity or security reasonably satisfactory to them, and reimbursement to the Company and the Rights Agent of all reasonable expenses incidental thereto, and upon surrender to the
Rights Agent and cancellation of the Rights Certificate, if mutilated, the Company will execute and deliver a new Rights Certificate of like tenor to the Rights Agent for countersignature and delivery to the registered holder in lieu of the Rights
Certificate so lost, stolen, destroyed or mutilated. 
 Section 7. Exercise of Rights; Purchase Price; Expiration Date of
Rights. 
 (a) Subject to Section 7(e) hereof, at any time after the Distribution Date the registered holder of any Rights
Certificate may exercise the Rights evidenced thereby (except as otherwise provided herein including the restrictions on exercisability set forth in Section 9(c), Section 11(a)(iii) and Section 23(a) hereof) in whole or in part upon
surrender of the Rights Certificate, with the form of election to purchase and the certificate on the reverse side thereof duly executed and properly completed, to the Rights Agent at the office or offices of the Rights Agent designated for such
purpose, together with payment of the aggregate Purchase Price with respect to the total number of one one-thousandths of a share of Preferred Stock (or other securities, cash or other assets, as the case may be) as to which such surrendered Rights
are then exercisable, at or prior to the earliest of (i) 5:00 P.M., New York City time, on November 7, 2016 or such later date as may be established by the Board prior to the expiration of the Rights (such date, as it may be extended by
the Board, the “Final Expiration Date”), or (ii) the time at which the Rights are redeemed as provided in Section 23 hereof, or (iii) the time at which the Rights may be exchanged as provided in Section 24 hereof, or
(iv) the time at which all of the Rights expire pursuant to Section 13(d) hereof (the earliest of (i), (ii), (iii) and (iv) being herein referred to as the “Expiration Date”). 

(b) The Purchase Price for each one one-thousandth of a share of Preferred Stock pursuant to the exercise of a Right initially shall be $150,
shall be subject to adjustment from time to time as provided in Section 11 and Section 13(a) hereof and shall be payable in accordance with paragraph (c) below. 

(c) Upon receipt of a Rights Certificate representing exercisable Rights, with the form of election to purchase and the certificate duly
executed and properly completed, accompanied by payment, with respect to each Right so exercised, of the Purchase Price per one one-thousandth of a share of Preferred Stock (or other shares, securities, cash or other assets, as the case may be) to
be purchased as set forth below and an amount equal to any applicable tax or charge required to be paid by the holder of such Rights Certificate in cash, or by certified bank check, money order, cashier’s check or bank draft payable to the
order of the Company, the Rights Agent shall, subject to Section 20(k) hereof, thereupon promptly (i) (A) requisition from any transfer agent of the shares of Preferred Stock (or make available, if the Rights Agent is the transfer
agent for such shares) certificates for the total number of one one-thousandths of a share of Preferred Stock to be purchased and the Company hereby irrevocably authorizes its transfer agent to comply with all such requests, or (B) if the
Company shall have elected to deposit the total number of shares of Preferred Stock issuable upon exercise of the Rights hereunder with a depositary agent, requisition from the depositary agent depositary receipts representing such number of one
one-thousandths of a share of Preferred Stock as are to be purchased (in which case certificates for the shares of Preferred Stock represented by such receipts shall be deposited by the transfer agent with the depositary agent) and the Company will
direct the depositary agent to comply with such request, (ii) when necessary to comply with this Agreement, requisition from the Company the amount of cash, if any, to be paid in lieu of the issuance of fractional shares in accordance with
Section 14 hereof, (iii) after receipt of such certificates or depositary receipts, cause the same to be delivered to or, upon the order of the registered holder of such Rights Certificate, registered in such name or names as may be
designated by such holder, and (iv) when necessary to comply with this Agreement, after receipt thereof, deliver such cash, if any, to or upon the order of the registered holder of such Rights Certificate. The payment of the Purchase Price (as
such amount may be reduced pursuant to Section 11(a)(iii) hereof) shall be made in cash or by certified bank check, money order, cashier’s check or bank draft payable to the order of the Company. In the event that the Company is obligated
to issue other securities (including Common Stock) of the Company, pay cash and/or distribute other property pursuant to Section 11(a) hereof, the Company will make all arrangements necessary so that such other securities, cash and/or other
property are available for distribution by the Rights Agent, if and when necessary to comply with this Agreement. The Company reserves the right to require prior to the occurrence of a Triggering Event that, upon any exercise of Rights, a number of
Rights be exercised so that only whole shares of Preferred Stock would be issued. 

  
 12 

 (d) In case the registered holder of any Rights Certificate shall exercise less than all the
Rights evidenced thereby, a new Rights Certificate evidencing the Rights remaining unexercised shall be issued by the Rights Agent and delivered to, or upon the order of, the registered holder of such Rights Certificate, registered in such name or
names as may be designated by such holder, subject to the provisions of Section 14 hereof. 
 (e) Notwithstanding anything in this
Agreement to the contrary, from and after the first occurrence of a Section 11(a)(ii) Event, any Rights beneficially owned by (i) an Acquiring Person or an Associate or Affiliate of an Acquiring Person, (ii) a transferee of an
Acquiring Person (or of any Associate or Affiliate of an Acquiring Person) who becomes a transferee after the Acquiring Person becomes such, or (iii) a transferee of an Acquiring Person (or of any Associate or Affiliate of an Acquiring Person)
who becomes a transferee prior to or concurrently with the Acquiring Person becoming such and receives such Rights pursuant to either (A) a transfer (whether or not for consideration) from the Acquiring Person to holders of equity interests in
such Acquiring Person or to any Person with whom the Acquiring Person has any continuing agreement, arrangement or understanding (whether or not in writing) regarding the transferred Rights or (B) a transfer which the Board has determined is
part of a plan, arrangement or understanding which has as a primary purpose or effect the avoidance of this Section 7(e), shall become null and void without any further action and no holder of such Rights shall have any rights whatsoever with
respect to such Rights, or any Rights Certificate which formerly evidenced such Rights. The Company shall use all reasonable efforts to insure that the provisions of this Section 7(e) and Section 4(b) hereof are complied with, but neither
the Company nor the Rights Agent shall have any liability to any holder of Rights Certificates or any other Person as a result of the Company’s failure to make any determinations with respect to an Acquiring Person or any of such Acquiring
Person’s Affiliates, Associates or transferees hereunder. The Company shall give the Rights Agent written notice of the identity of any such Acquiring Person, Associate or Affiliate, or the nominee of any of the foregoing, and the Rights Agent
may rely on such notice in carrying out its duties under this Agreement and shall be deemed not to have any knowledge of the identity of any such Acquiring Person, Associate or Affiliate, or the nominee of any of the foregoing unless and until it
shall have received such notice. 
 (f) Notwithstanding anything in this Agreement to the contrary, neither the Rights Agent nor the
Company shall be obligated to undertake any action with respect to a registered holder upon the occurrence of any purported exercise as set forth in this Section 7 unless such registered holder shall have (i) properly completed and duly
executed the certificate contained in the form of election to purchase set forth on the reverse side of the Rights Certificate surrendered for such exercise, and (ii) provided such additional evidence of the identity of the Beneficial Owner (or
former Beneficial Owner) or Affiliates or Associates thereof as the Company or the Rights Agent shall reasonably request. 

Section 8. Cancellation and Destruction of Rights Certificates. 

All Rights Certificates surrendered for the purpose of exercise, transfer, split up, combination, redemption or exchange shall, if
surrendered to the Company or any of its agents, be delivered to the Rights Agent for cancellation or in cancelled form, or, if surrendered to the Rights Agent, shall be cancelled by it, and no Rights Certificates shall be issued in lieu thereof
except as expressly permitted by any of the provisions of this Agreement. The Company shall deliver to the Rights Agent for cancellation and retirement, and the Rights Agent shall so cancel and retire, any other Rights Certificate purchased or
acquired by the Company otherwise than upon the exercise thereof. The Rights Agent shall deliver all cancelled Rights Certificates to the Company, or shall, at the written request of the Company, destroy, or cause to be destroyed, such cancelled
Rights Certificates, and in such case shall deliver a certificate of destruction thereof to the Company. 
 Section 9. Reservation
and Availability of Capital Stock. 
 (a) The Company covenants and agrees that it will cause to be reserved and kept available out of
its authorized and unissued shares of Preferred Stock (and, following the occurrence of a Triggering Event, out of its authorized and unissued shares of Common Stock and/or other securities or out of its authorized and issued shares held in its
treasury), the number of shares of Preferred Stock (and, following the occurrence of a Triggering Event, Common Stock and/or other securities) that, as provided in this Agreement including Section 11(a)(iii) hereof, will be sufficient to permit
the exercise in full of all outstanding Rights. 
 (b) So long as the shares of Preferred Stock (and, following the occurrence of a
Triggering Event, Common Stock and/or other securities) issuable and deliverable upon the exercise of the Rights may be listed on any national securities exchange, the Company shall use its best efforts to cause, from and after such time as the
Rights become exercisable (but only to the extent 

  
 13 

 
that it is reasonably likely that the Rights will be exercised), all shares reserved for such issuance to be listed on such exchange upon official notice of issuance upon such exercise. 

(c) The Company shall use its best efforts to (i) file, as soon as practicable following the earliest date after the first occurrence of
a Section 11(a)(ii) Event on which the consideration to be delivered by the Company upon exercise of the Rights has been determined pursuant to this Agreement (including in accordance with Section 11(a)(iii) hereof), or as soon as is
required by law following the Distribution Date, a registration statement under the Act, with respect to the securities purchasable upon exercise of the Rights on an appropriate form, (ii) cause such registration statement to become effective
as soon as practicable after such filing, and (iii) cause such registration statement to remain effective (with a prospectus at all times meeting the requirements of the Act) until the earlier of (A) the date as of which the Rights are no
longer exercisable for such securities, and (B) the Expiration Date. The Company will also take such action as may be appropriate under, or to ensure compliance with, the securities or “blue sky” laws of the various states in
connection with the exercisability of the Rights. The Company may temporarily suspend, for a period of time not to exceed ninety (90) days after the date set forth in clause (i) of the first sentence of this Section 9(c), the
exercisability of the Rights in order to prepare and file such registration statement and permit it to become effective. Upon any suspension referred to in this paragraph, the Company shall issue a public announcement stating, and promptly notify
the Rights Agent in writing, that the exercisability of the Rights has been temporarily suspended, as well as a public announcement and prompt written notification to the Rights Agent at such time as the suspension has been rescinded. In addition,
if the Company shall determine that a registration statement is required following the Distribution Date, the Company may temporarily suspend the exercisability of the Rights until such time as a registration statement has been declared effective.
Notwithstanding any provision of this Agreement to the contrary, the Rights shall not be exercisable in any jurisdiction if the requisite qualification in such jurisdiction shall not have been obtained, the exercise thereof shall not be permitted
under applicable law, or a registration statement in respect thereof shall not have been declared effective. 
 (d) The Company covenants
and agrees that it will take all such action as may be necessary to ensure that all one one-thousandths of a share of Preferred Stock (and, following the occurrence of a Triggering Event, Common Stock and/or other securities) delivered upon exercise
of Rights shall, at the time of delivery of the certificates for such shares (subject to payment of the Purchase Price), be duly and validly authorized and issued and fully paid and nonassessable. 

(e) The Company further covenants and agrees that it will pay when due and payable any and all taxes and charges which may be payable in
respect of the issuance or delivery of the Rights Certificates and of any certificates for a number of one one-thousandths of a share of Preferred Stock (or Common Stock and/or other securities, as the case may be) upon the exercise of Rights. The
Company shall not, however, be required to pay any tax or charge which may be payable in respect of any transfer or delivery of Rights Certificates to a Person other than, or the issuance or delivery of a number of one one-thousandths of a share of
Preferred Stock (or Common Stock and/or other securities, as the case may be) in respect of a name other than that of the registered holder of the Rights Certificates evidencing Rights surrendered for exercise or to issue or deliver any certificates
for a number of one one-thousandths of a share of Preferred Stock (or Common Stock and/or other securities, as the case may be) in a name other than that of the registered holder upon the exercise of any Rights until such tax shall have been paid
(any such tax being payable by the holder of such Rights Certificates at the time of surrender) or until it has been established to the Company’s and the Rights Agent’s satisfaction that no such tax or charge is due. 

Section 10. Preferred Stock Record Date. Each person in whose name any certificate for a number of one one-thousandths of a share
of Preferred Stock (or Common Stock and/or other securities, as the case may be) is issued upon the exercise of Rights shall for all purposes be deemed to have become the holder of record of such fractional shares of Preferred Stock (or Common Stock
and/or other securities, as the case may be) represented thereby on, and such certificate shall be dated, the date upon which the Rights Certificate evidencing such Rights was duly surrendered and payment of the Purchase Price (and all applicable
taxes and charges) was made; provided, however, that if the date of such surrender and payment is a date upon which the Preferred Stock (or Common Stock and/or other securities, as the case may be) transfer books of the Company are
closed, such Person shall be deemed to have become the record holder of such shares (fractional or otherwise) on, and such certificate shall be dated, the next succeeding Business Day on which the Preferred Stock (or Common Stock and/or other
securities, as the case may be) transfer books of the Company are open. Prior to the exercise of the Rights evidenced thereby, the holder of a Rights Certificate shall not be entitled to any rights of a stockholder of the Company with respect to
shares for which the Rights shall be exercisable, including the right to vote, to receive dividends or other distributions or to exercise any preemptive rights, and shall not be entitled to receive any notice of any proceedings of the Company,
except as provided herein. 

  
 14 

 Section 11. Adjustment of Purchase Price, Number and Kind of Shares or Number of
Rights. The Purchase Price, the number and kind of shares covered by each Right and the number of Rights outstanding are subject to adjustment from time to time as provided in this Section 11. 

(a) (i) In the event the Company shall at any time after the date of this Agreement (A) declare a dividend on the
Preferred Stock payable in shares of Preferred Stock, (B) subdivide or split the outstanding shares of Preferred Stock, (C) combine or consolidate the outstanding shares of Preferred Stock into a smaller number of shares, through a reverse
stock split or otherwise, or (D) issue any shares of its capital stock in a reclassification of the Preferred Stock (including any such reclassification in connection with a consolidation or merger in which the Company is the continuing or
surviving corporation), except as otherwise provided in this Section 11(a) and Section 7(e) hereof, the Purchase Price in effect at the time of the record date for such dividend or of the effective date of such subdivision, split,
combination, consolidation or reclassification, and the number and kind of shares of Preferred Stock or capital stock, as the case may be, issuable on such date, shall be proportionately adjusted so that the holder of any Right exercised after such
time shall be entitled to receive, upon payment of the Purchase Price then in effect, the aggregate number and kind of shares of Preferred Stock or capital stock, as the case may be, which, if such Right had been exercised immediately prior to such
date and at a time when the Preferred Stock transfer books of the Company were open, such holder would have owned upon such exercise and been entitled to receive by virtue of such dividend, subdivision, split, combination, consolidation or
reclassification. If an event occurs which would require an adjustment under both this Section 11(a)(i) and Section 11(a)(ii) hereof, the adjustment provided for in this Section 11(a)(i) shall be in addition to, and shall be made
prior to, any adjustment required pursuant to Section 11(a)(ii) hereof. 
 (ii) Subject to Section 24 hereof, in
the event that any Person shall, at any time after the Rights Dividend Declaration Date, become an Acquiring Person, unless the event causing such Person to become an Acquiring Person is a transaction set forth in Section 13(a) hereof, or is an
acquisition of shares of Common Stock pursuant to a tender offer or an exchange offer for all outstanding shares of Common Stock at a price and on terms determined by at least a majority of the members of the Board who are not officers of the
Company and who are not representatives, nominees, Affiliates or Associates of an Acquiring Person, after receiving advice from one or more investment banking firms, to be (a) at a price which is fair to stockholders and not inadequate (taking
into account all factors which such members of the Board deem relevant, including, without limitation, prices which could reasonably be achieved if the Company or its assets were sold on an orderly basis designed to realize maximum value) and
(b) otherwise in the best interests of the Company and its stockholders (a “Qualified Offer”), then, promptly following the occurrence of such event, proper provision shall be made so that each holder of a Right (except as provided
below and in Section 7(e) hereof) shall thereafter have the right to receive, upon exercise thereof at the then current Purchase Price in accordance with the terms of this Agreement, in lieu of a number of one one-thousandths of a share of
Preferred Stock, such number of shares of Common Stock of the Company as shall equal the result obtained by (x) multiplying the then current Purchase Price by the then number of one one-thousandths of a share of Preferred Stock for which a
Right was exercisable immediately prior to the first occurrence of a Section 11(a)(ii) Event, and (y) dividing that product (which, following such first occurrence, shall thereafter be referred to as the “Purchase Price” for each
Right and for all purposes of this Agreement) by fifty percent (50%) of the Current Market Price (determined pursuant to Section 11(d) hereof) per share of Common Stock on the date of such first occurrence (such number of shares, the
“Adjustment Shares”). The Company shall notify the Rights Agent when this Section 11(a)(ii) applies. Notwithstanding anything in this Agreement to the contrary, a Section 11(a)(ii) Event shall not be deemed to have occurred
solely as a result of (A) the approval, execution, delivery, announcement or performance of the Purchase Agreement; (B) the consummation of the Cambridge LP Acquisition or any of the other transactions contemplated in the Purchase
Agreement or (C) the exercise of the warrant issued to the Investor pursuant to the Purchase Agreement. 
 (iii) In the
event that the number of shares of Common Stock which is authorized by the Company’s restated certificate of incorporation, as amended, but not outstanding or reserved for issuance for purposes other than upon exercise of the Rights, is not
sufficient to permit the exercise in full of the Rights in accordance with the foregoing subparagraph (ii) of this Section 11(a), the Company shall (A) determine the value of the Adjustment Shares issuable upon the exercise of a Right
(the “Current Value”), and (B) with respect to each Right (subject to Section 7(e) hereof), make adequate provision to substitute for the Adjustment Shares, upon the exercise of a Right and payment of the applicable Purchase
Price, (1) cash, (2) a reduction in the Purchase Price, (3) Common Stock or other equity securities of the Company (including shares, or units of shares, of preferred stock, such as the Preferred Stock, which the Board has deemed to
have essentially the same value or economic rights as shares of Common Stock (such shares of preferred stock being referred to as “Common Stock Equivalents”)), (4) debt securities of the Company, (5) other assets, or (6) any
combination of the foregoing, having an 

  
 15 

 
aggregate value equal to the Current Value (less the amount of any reduction in the Purchase Price), where such aggregate value has been determined by the Board based upon the advice of a
nationally recognized investment banking firm selected by the Board, whose determination shall be described in a statement filed with the Rights Agent that shall be binding on the Rights Agent and holders of Rights; provided, however,
that if the Company shall not have made adequate provision to deliver value pursuant to clause (B) above within thirty (30) days following the later of (x) the first occurrence of a Section 11(a)(ii) Event and (y) the date
on which the Company’s right of redemption pursuant to Section 23(a) expires (the later of (x) and (y) being referred to herein as the “Section 11(a)(ii) Trigger Date”), then the Company shall be obligated to deliver,
upon the surrender for exercise of a Right and without requiring payment of the Purchase Price, shares of Common Stock (to the extent available) and then, if necessary, cash, which shares and/or cash have an aggregate value equal to the Spread. For
purposes of the preceding sentence, the term “Spread” shall mean the excess of (i) the Current Value over (ii) the Purchase Price. If the Board determines in good faith that it is likely that sufficient additional shares of
Common Stock could be authorized for issuance upon exercise in full of the Rights, the thirty (30) day period set forth above may be extended to the extent necessary (with prompt written notice of such extension to the Rights Agent), but not
more than ninety (90) days after the Section 11(a)(ii) Trigger Date, in order that the Company may seek stockholder approval for the authorization of such additional shares (such thirty (30) day period, as it may be extended, is
herein called the “Substitution Period”). To the extent that the Company determines that action should be taken pursuant to the first and/or third sentences of this Section 11(a)(iii), the Company (1) shall provide, subject to
Section 7(e) hereof, that such action shall apply uniformly to all outstanding Rights, and (2) may suspend the exercisability of the Rights until the expiration of the Substitution Period in order to seek such stockholder approval for such
authorization of additional shares and/or to decide the appropriate form of distribution to be made pursuant to such first sentence and to determine the value thereof. In the event of any such suspension, the Company shall issue a public
announcement stating, and promptly notify the Rights Agent in writing, that the exercisability of the Rights has been temporarily suspended, as well as a public announcement and prompt written notification to the Rights Agent at such time as the
suspension is no longer in effect. For purposes of this Section 11(a)(iii), the value of each Adjustment Share shall be the Current Market Price per share of Common Stock on the Section 11(a)(ii) Trigger Date and the per share or per unit
value of any Common Stock Equivalent shall be deemed to equal the Current Market Price per share of the Common Stock on such date. 
 (b)
In case the Company shall fix a record date for the issuance of rights, options or warrants to all holders of shares of Preferred Stock entitling them to subscribe for or purchase (for a period expiring within forty-five (45) calendar days
after such record date) shares of Preferred Stock (or shares having the same rights, privileges and preferences as the shares of Preferred Stock (“Equivalent Preferred Stock”)) or securities convertible into Preferred Stock or Equivalent
Preferred Stock at a price per share of Preferred Stock or per share of Equivalent Preferred Stock (or having a conversion price per share, if a security convertible into Preferred Stock or Equivalent Preferred Stock) less than the Current Market
Price (as determined pursuant to Section 11(d) hereof) per share of Preferred Stock on such record date, the Purchase Price to be in effect after such record date shall be determined by multiplying the Purchase Price in effect immediately prior
to such record date by a fraction, the numerator of which shall be the number of shares of Preferred Stock outstanding on such record date, plus the number of shares of Preferred Stock which the aggregate offering price of the total number of shares
of Preferred Stock and/or Equivalent Preferred Stock so to be offered (and/or the aggregate initial conversion price of the convertible securities so to be offered) would purchase at such Current Market Price, and the denominator of which shall be
the number of shares of Preferred Stock outstanding on such record date, plus the number of additional shares of Preferred Stock and/or Equivalent Preferred Stock to be offered for subscription or purchase (or into which the convertible securities
so to be offered are initially convertible). In case such subscription price may be paid by delivery of consideration, part or all of which may be in a form other than cash, the value of such consideration shall be as determined in good faith by the
Board, whose determination shall be described in a statement filed with the Rights Agent that shall be binding on the Rights Agent and holders of Rights. Shares of Preferred Stock owned by or held for the account of the Company shall not be deemed
outstanding for the purpose of any such computation. Such adjustment shall be made successively whenever such a record date is fixed, and in the event that such rights or warrants are not so issued, the Purchase Price shall be adjusted to be the
Purchase Price which would then be in effect if such record date had not been fixed. 
 (c) In case the Company shall fix a record date for
a distribution to all holders of shares of Preferred Stock (including any such distribution made in connection with a consolidation or merger in which the Company is the continuing or surviving corporation), cash (other than a regular quarterly cash
dividend out of the earnings or retained earnings of the Company), assets (other than a dividend payable in Preferred Stock, but including any dividend payable in stock other than Preferred Stock) or evidences of indebtedness, or of subscription
rights or warrants (excluding those referred to in Section 11(b) hereof), the Purchase Price to be in effect after such record date shall be determined by multiplying the Purchase Price in effect

  
 16 

 
immediately prior to such record date by a fraction, the numerator of which shall be the Current Market Price (as determined pursuant to Section 11(d) hereof) per share of Preferred Stock on
such record date, less the fair market value (as determined in good faith by the Board, whose determination shall be described in a statement filed with the Rights Agent and shall be conclusive and binding on the Rights Agent, the holders of the
Rights and all other Persons) of the portion of the cash, assets or evidences of indebtedness so to be distributed or of such subscription rights or warrants applicable to a share of Preferred Stock, and the denominator of which shall be such
Current Market Price (as determined pursuant to Section 11(d) hereof) per share of Preferred Stock. Such adjustments shall be made successively whenever such a record date is fixed, and in the event that such distribution is not so made, the
Purchase Price shall be adjusted to be the Purchase Price which would have been in effect if such record date had not been fixed. 
 (d)
(i) For the purpose of any computation hereunder, other than computations made pursuant to Section 11(a)(iii) hereof, the Current Market Price per share of Common Stock on any date shall be deemed to be the average of the daily closing
prices per share of such Common Stock for the thirty (30) consecutive Trading Days immediately prior to but not including such date, and for purposes of computations made pursuant to Section 11(a)(iii) hereof, the Current Market Price per
share of Common Stock on any date shall be deemed to be the average of the daily closing prices per share of such Common Stock for the ten (10) consecutive Trading Days immediately following but not including such date; provided,
however, that in the event that the Current Market Price per share of the Common Stock is determined during a period following the announcement by the issuer of such Common Stock of (A) a dividend or distribution on such Common Stock
payable in shares of such Common Stock or securities convertible into shares of such Common Stock (other than the Rights), or (B) any subdivision, combination, consolidation, reverse stock split or reclassification of such Common Stock, and the
ex-dividend date for such dividend or distribution, or the record date for such subdivision, combination, consolidation, reverse stock split or reclassification shall not have occurred prior to the commencement of the requisite thirty
(30) Trading Day or ten (10) Trading Day period, as set forth above, then, and in each such case, the Current Market Price shall be properly adjusted to take into account ex dividend trading. The closing price for each day shall be the
last sale price, regular way, or, in case no such sale takes place on such day, the average of the closing bid and asked prices, regular way, in either case as reported in the principal consolidated transaction reporting system with respect to
securities listed or admitted to trading on the NASDAQ Stock Market LLC (“NASDAQ”) or, if the shares of Common Stock are not listed or admitted to trading on the NASDAQ, as reported in the principal consolidated transaction reporting
system with respect to securities listed on the principal national securities exchange on which the shares of Common Stock are listed or admitted to trading or, if the shares of Common Stock are not listed or admitted to trading on any national
securities exchange, the last quoted price or, if not so quoted, the average of the high bid and low asked prices in the over-the-counter market, as reported by NASDAQ, or such other system then in use, or, if on any such date the shares of Common
Stock are not quoted by any such organization, the average of the closing bid and asked prices as furnished by a professional market maker making a market in the Common Stock selected by the Board. If on any such date no market maker is making a
market in the Common Stock, the fair value of such shares on such date shall be as determined in good faith by the Board, whose determination shall be described in a statement filed with the Rights Agent that shall be binding on the Rights Agent and
holders of Rights. The term “Trading Day” shall mean a day on which the principal national securities exchange on which the shares of Common Stock are listed or admitted to trading is open for the transaction of business or, if the shares
of Common Stock are not listed or admitted to trading on any national securities exchange, a Business Day. If the Common Stock is not publicly held or not so listed or traded, the Current Market Price per share shall mean the fair value per share as
determined in good faith by the Board, whose determination shall be described in a statement filed with the Rights Agent and shall be conclusive for all purposes. 

(ii) For the purpose of any computation hereunder, the Current Market Price per share of Preferred Stock shall be determined
in the same manner as set forth above for the Common Stock in clause (i) of this Section 11(d) (other than the last sentence thereof). If the Current Market Price per share of Preferred Stock cannot be determined in the manner provided
above or if the Preferred Stock is not publicly held or listed or traded in a manner described in clause (i) of this Section 11(d), the Current Market Price per share of Preferred Stock shall be conclusively deemed to be an amount equal to
1,000 (as such number may be appropriately adjusted for such events as stock splits, stock dividends and recapitalizations with respect to the Common Stock occurring after the date of this Agreement) multiplied by the Current Market Price per share
of the Common Stock. If neither the Common Stock nor the Preferred Stock is publicly held or so listed or traded, Current Market Price per share of the Preferred Stock shall mean the fair value per share as determined in good faith by the Board,
whose determination shall be described in a statement filed with the Rights Agent and shall be conclusive for all purposes. 

  
 17 

 (e) Anything herein to the contrary notwithstanding, no adjustment in the Purchase Price shall
be required unless such adjustment would require an increase or decrease of at least one percent (1%) in the Purchase Price; provided, however, that any adjustments which by reason of this Section 11(e) are not required to be
made shall be carried forward and taken into account in any subsequent adjustment. All calculations under this Section 11 shall be made to the nearest cent or to the nearest ten thousandth of a share of Common Stock or other share or one
millionth of a share of Preferred Stock, as the case may be. Notwithstanding the first sentence of this Section 11(e), any adjustment required by this Section 11 shall be made no later than the earlier of (i) three (3) years from
the date of the transaction which mandates such adjustment, or (ii) the Expiration Date. 
 (f) If as a result of an adjustment made
pursuant to Section 11(a)(ii) or Section 13(a) hereof, the holder of any Right thereafter exercised shall become entitled to receive any shares of capital stock other than Preferred Stock, thereafter the number of such other shares so
receivable upon exercise of any Right and the Purchase Price thereof shall be subject to adjustment from time to time in a manner and on terms as nearly equivalent as practicable to the provisions with respect to the Preferred Stock contained in
Sections 11(a), (b), (c), (e), (g), (h), (i), (j), (k) and (m), and the provisions of Sections 7, 9, 10, 13 and 14 hereof with respect to the Preferred Stock shall apply on like terms to any such other shares. 

(g) All Rights originally issued by the Company subsequent to any adjustment made to the Purchase Price hereunder shall evidence the right to
purchase, at the adjusted Purchase Price, the number of one one-thousandths of a share of Preferred Stock purchasable from time to time hereunder upon exercise of the Rights, all subject to further adjustment as provided herein. 

(h) Unless the Company shall have exercised its election as provided in Section 11(i) hereof, upon each adjustment of the Purchase Price
as a result of the calculations made in Sections 11(b) and (c) hereof, each Right outstanding immediately prior to the making of such adjustment shall thereafter evidence the right to purchase, at the adjusted Purchase Price, that number of one
one-thousandths of a share of Preferred Stock (calculated to the nearest one-millionth) obtained by (i) multiplying (x) the number of one one-thousandths of a share covered by a Right immediately prior to this adjustment, by (y) the
Purchase Price in effect immediately prior to such adjustment of the Purchase Price, and (ii) dividing the product so obtained by the Purchase Price in effect immediately after such adjustment of the Purchase Price. 

(i) The Company may elect on or after the date of any adjustment of the Purchase Price to adjust the number of Rights, in lieu of any
adjustment in the number of one one-thousandths of a share of Preferred Stock purchasable upon the exercise of a Right. Each of the Rights outstanding after the adjustment in the number of Rights shall be exercisable for the number of one
one-thousandths of a share of Preferred Stock for which a Right was exercisable immediately prior to such adjustment. Each Right held of record prior to such adjustment of the number of Rights shall become that number of Rights (calculated to the
nearest one ten-thousandth) obtained by dividing the Purchase Price in effect immediately prior to adjustment of the Purchase Price by the Purchase Price in effect immediately after adjustment of the Purchase Price. The Company shall make a public
announcement of its election to adjust the number of Rights, indicating the record date for the adjustment, and, if known at the time, the amount of the adjustment to be made, and shall promptly give the Rights Agent a copy of such announcement.
This record date may be the date on which the Purchase Price is adjusted or any day thereafter, but, if the Rights Certificates have been issued, shall be at least ten (10) days later than the date of the public announcement. If Rights
Certificates have been issued, upon each adjustment of the number of Rights pursuant to this Section 11(i), the Company shall, as promptly as practicable, cause to be distributed to holders of record of Rights Certificates on such record date
Rights Certificates evidencing, subject to Section 14 hereof, the additional Rights to which such holders shall be entitled as a result of such adjustment, or, at the option of the Company, shall cause to be distributed to such holders of
record in substitution and replacement for the Rights Certificates held by such holders prior to the date of adjustment, and upon surrender thereof, if required by the Company, new Rights Certificates evidencing all the Rights to which such holders
shall be entitled after such adjustment. Rights Certificates so to be distributed shall be issued, executed and countersigned in the manner provided for herein (and may bear, at the option of the Company, the adjusted Purchase Price) and shall be
registered in the names of the holders of record of Rights Certificates on the record date specified in the public announcement. 
 (j)
Irrespective of any adjustment or change in the Purchase Price or the number of one one-thousandths of a share of Preferred Stock issuable upon the exercise of the Rights, the Rights Certificates theretofore and thereafter issued may continue to
express the Purchase Price per one one-thousandth of a share and the number of one one-thousandth of a share which were expressed in the initial Rights Certificates issued hereunder. 

  
 18 

 (k) Before taking any action that would cause an adjustment reducing the Purchase Price below
the then stated value, if any, of the number of one one-thousandths of a share of Preferred Stock issuable upon exercise of the Rights, the Company shall take any corporate action which may, in the opinion of its counsel, be necessary in order that
the Company may validly and legally issue fully paid and nonassessable such number of one one-thousandths of a share of Preferred Stock at such adjusted Purchase Price. 

(l) In any case in which this Section 11 shall require that an adjustment in the Purchase Price be made effective as of a record date
for a specified event, the Company may elect to defer (with prompt written notice thereof to the Rights Agent) until the occurrence of such event the issuance to the holder of any Right exercised after such record date the number of one
one-thousandths of a share of Preferred Stock and other capital stock or securities of the Company, if any, issuable upon such exercise over and above the number of one one-thousandths of a share of Preferred Stock and other capital stock or
securities of the Company, if any, issuable upon such exercise on the basis of the Purchase Price in effect prior to such adjustment; provided, however, that the Company shall deliver to such holder a due bill or other appropriate
instrument evidencing such holder’s right to receive such additional shares (fractional or otherwise) or securities upon the occurrence of the event requiring such adjustment. 

(m) Anything in this Section 11 to the contrary notwithstanding, the Company shall be entitled to make such reductions in the Purchase
Price, in addition to those adjustments expressly required by this Section 11, as and to the extent that in their good faith judgment the Board shall determine to be advisable in order that any (i) consolidation or subdivision of the
Preferred Stock, (ii) issuance wholly for cash of any shares of Preferred Stock at less than the Current Market Price, (iii) issuance wholly for cash of shares of Preferred Stock or securities which by their terms are convertible into or
exchangeable for shares of Preferred Stock, (iv) stock dividends or (v) issuance of rights, options or warrants referred to in this Section 11, hereafter made by the Company to holders of its Preferred Stock shall not be taxable to
such stockholders. 
 (n) The Company covenants and agrees that it shall not, at any time after the Distribution Date, (i) consolidate
with any other Person (other than a Subsidiary of the Company in a transaction which complies with Section 11(o) hereof), (ii) merge with or into any other Person (other than a Subsidiary of the Company in a transaction which complies with
Section 11(o) hereof), or (iii) sell or transfer (or permit any Subsidiary to sell or transfer), in one transaction, or a series of related transactions, assets, cash flow or earning power aggregating more than 50% of the assets, cash flow
or earning power of the Company and its Subsidiaries (taken as a whole) to any other Person or Persons (other than the Company and/or any of its Subsidiaries in one or more transactions each of which complies with Section 11(o) hereof), if
(x) at the time of or immediately after such consolidation, merger or sale there are any rights, warrants or other instruments or securities outstanding or agreements in effect which would substantially diminish or otherwise eliminate the
benefits intended to be afforded by the Rights or (y) prior to, simultaneously with or immediately after such consolidation, merger or sale, the stockholders of the Person who constitutes, or would constitute, the “Principal Party”
for purposes of Section 13(a) hereof shall have received a distribution of Rights previously owned by such Person or any of its Affiliates and Associates. 

(o) The Company covenants and agrees that, after the Distribution Date, it will not, except as permitted by Section 23, Section 24
or Section 27 hereof, take (or permit any Subsidiary to take) any action if at the time such action is taken it is reasonably foreseeable that such action will diminish substantially or otherwise eliminate the benefits intended to be afforded
by the Rights. 
 (p) Anything in this Agreement to the contrary notwithstanding, in the event that the Company shall at any time after the
Rights Dividend Declaration Date and prior to the Distribution Date (i) declare a dividend on the outstanding shares of Common Stock payable in shares of Common Stock, (ii) subdivide the outstanding shares of Common Stock, or
(iii) combine the outstanding shares of Common Stock into a smaller number of shares, the number of Rights associated with each share of Common Stock then outstanding, or issued or delivered thereafter but prior to the Distribution Date, shall
be proportionately adjusted so that the number of Rights thereafter associated with each share of Common Stock following any such event shall equal the result obtained by multiplying the number of Rights associated with each share of Common Stock
immediately prior to such event by a fraction the numerator which shall be the total number of shares of Common Stock outstanding immediately prior to the occurrence of the event and the denominator of which shall be the total number of shares of
Common Stock outstanding immediately following the occurrence of such event. 
 Section 12. Certificate of Adjusted Purchase Price
or Number of Shares. Whenever an adjustment is made or any event affecting the Rights or their exercisability (including without limitation an event which causes the Rights to become null and void) occurs as provided in Section 11 and
Section 13 hereof, the Company shall (a) promptly prepare a certificate setting forth such 

  
 19 

 
adjustment or describing such event and a brief, reasonably detailed statement of the facts and computations accounting for such adjustment or event, (b) promptly file with the Rights Agent,
and with each transfer agent for the Preferred Stock and the Common Stock, a copy of such certificate and (c) if a Distribution Date has occurred, mail a brief summary thereof to each holder of a Rights Certificate (or, if prior to the
Distribution Date, to each holder of a certificate representing shares of Common Stock) in accordance with Section 25 hereof. The Rights Agent shall be fully protected in relying on any such certificate and on any adjustment or statement
contained therein and shall have no duty or liability with respect to, and shall not be deemed to have knowledge of, any such adjustment or any such event unless and until it shall have received such certificate. 

Section 13. Consolidation, Merger or Sale or Transfer of Assets, Cash Flow or Earning Power. 

(a) In the event that, following the Stock Acquisition Date, directly or indirectly, (x) the Company shall consolidate with, or merge
with and into, any other Person (other than a Subsidiary of the Company in a transaction which complies with Section 11(o) hereof), and the Company shall not be the continuing or surviving corporation of such consolidation or merger,
(y) any Person (other than a Subsidiary of the Company in a transaction which complies with Section 11(o) hereof) shall consolidate with, or merge with or into, the Company, and the Company shall be the continuing or surviving corporation
of such consolidation or merger and, in connection with such consolidation or merger, all or part of the outstanding shares of Common Stock shall be changed into or exchanged for stock or other securities of any other Person or cash or any other
property, or (z) the Company shall sell or otherwise transfer (or one or more of its Subsidiaries shall sell or otherwise transfer), in one transaction or a series of related transactions, assets, cash flow or earning power aggregating more
than fifty percent (50%) of the assets, cash flow or earning power of the Company and its Subsidiaries (taken as a whole) to any Person or Persons (other than the Company or any Subsidiary of the Company in one or more transactions each of
which complies with Section 11(o) hereof), then, and in each such case (except as may be contemplated by Section 13(d) hereof), proper provision shall be made so that: (i) each holder of a Right, except as provided in
Section 7(e) hereof, shall thereafter have the right to receive, upon the exercise thereof at the then current Purchase Price in accordance with the terms of this Agreement, such number of validly authorized and issued, fully paid, non
assessable and freely tradeable shares of Common Stock of the Principal Party, not subject to any liens, encumbrances, rights of first refusal or other adverse claims, as shall be equal to the result obtained by (1) multiplying the then current
Purchase Price by the number of one one-thousandths of a share of Preferred Stock for which a Right is exercisable immediately prior to the first occurrence of a Section 13 Event (or, if a Section 11(a)(ii) Event has occurred prior to the
first occurrence of a Section 13 Event, multiplying the number of such one one-thousandths of a share for which a Right was exercisable immediately prior to the first occurrence of a Section 11(a)(ii) Event by the Purchase Price in effect
immediately prior to such first occurrence of a Section 11(a)(ii) Event), and (2) dividing that product (which, following the first occurrence of a Section 13 Event, shall be referred to as the “Purchase Price” for each
Right and for all purposes of this Agreement) by 50% of the Current Market Price (determined pursuant to Section 11(d)(i) hereof) per share of the Common Stock of such Principal Party on the date of consummation of such Section 13 Event;
(ii) such Principal Party shall thereafter be liable for, and shall assume, by virtue of such Section 13 Event, all the obligations and duties of the Company pursuant to this Agreement; (iii) the term “Company” shall
thereafter be deemed to refer to such Principal Party, it being specifically intended that the provisions of Section 11 hereof shall apply only to such Principal Party following the first occurrence of a Section 13 Event; (iv) such
Principal Party shall take such steps (including the reservation of a sufficient number of shares of its Common Stock) in connection with the consummation of any such transaction as may be necessary to assure that the provisions hereof shall
thereafter be applicable, as nearly as reasonably may be, in relation to its shares of Common Stock thereafter deliverable upon the exercise of the Rights; and (v) the provisions of Section 11(a)(ii) hereof shall be of no effect following
the first occurrence of any Section 13 Event. 
 (b) “Principal Party” shall mean: 

(i) in the case of any transaction described in clause (x) or (y) of the first sentence of Section 13(a)
hereof, the Person that is the issuer of any securities into which shares of Common Stock of the Company are converted in such merger or consolidation, and if no securities are so issued, the Person that is the other party to such merger or
consolidation; and 
 (ii) in the case of any transaction described in clause (z) of the first sentence of
Section 13(a) hereof, the Person that is the party receiving the greatest portion of the assets, cash flow or earning power transferred pursuant to such transaction or transactions; 

provided, however, that in any such case, (1) if the Common Stock of such Person is not at such time and has not been continuously over the
preceding twelve (12) month period registered under Section 12 of the Exchange Act, and such Person is a direct or indirect Subsidiary of another Person the Common Stock of which is and has been so registered, “Principal Party”
shall 

  
 20 

 
refer to such other Person; and (2) in case such Person is a Subsidiary, directly or indirectly, of more than one Person, the Common Stock of two or more of which are and have been so
registered, “Principal Party” shall refer to whichever of such Persons is the issuer of the Common Stock having the greatest aggregate market value. 

(c) The Company shall not consummate any such consolidation, merger, sale or transfer unless the Principal Party shall have a sufficient
number of authorized shares of its Common Stock which have not been issued or reserved for issuance to permit the exercise in full of the Rights in accordance with this Section 13 and unless prior thereto the Company and such Principal Party
shall have executed and delivered to the Rights Agent a supplemental agreement providing for the terms set forth in paragraphs (a) and (b) of this Section 13 and further providing that, as soon as practicable after the date of any
consolidation, merger or sale of assets mentioned in paragraph (a) of this Section 13, the Principal Party will 

(i) prepare and file a registration statement under the Act, with respect to the Rights and the securities purchasable upon
exercise of the Rights on an appropriate form, and will use its best efforts to cause such registration statement to (A) become effective as soon as practicable after such filing and (B) remain effective (with a prospectus at all times
meeting the requirements of the Act) until the Expiration Date; 
 (ii) take all such other action as may be necessary to
enable the Principal Party to issue the securities purchasable upon exercise of the Rights, including the registration or qualification of such securities under all requisite securities laws of jurisdictions of the various states and the listing of
such securities on such exchanges and trading markets as may be necessary or appropriate; and 
 (iii) deliver to holders of
the Rights historical financial statements for the Principal Party and each of its Affiliates, which comply in all respects with the requirements for registration on Form 10 (or any successor form) under the Exchange Act. 

The provisions of this Section 13 shall similarly apply to successive mergers or consolidations or sales or other transfers. In the event that a
Section 13 Event shall occur at any time after the occurrence of a Section 11(a)(ii) Event, the Rights which have not theretofore been exercised shall thereafter become exercisable in the manner described in Section 13(a). 

(d) Notwithstanding anything in this Agreement to the contrary, Section 13 shall not be applicable to a transaction described in
subparagraphs (x) and (y) of Section 13(a) if (i) such transaction is consummated with a Person or Persons who acquired shares of Common Stock pursuant to a tender offer or exchange offer for all outstanding shares of Common
Stock which is a Qualified Offer as such term is defined in Section 11(a)(ii) hereof (or a wholly owned subsidiary of any such Person or Persons), (ii) the price per share of Common Stock offered in such transaction is not less than the
price per share of Common Stock paid to all holders of shares of Common Stock whose shares were purchased pursuant to such tender offer or exchange offer and (iii) the form of consideration being offered to the remaining holders of shares of
Common Stock pursuant to such transaction is the same as the form of consideration paid pursuant to such tender offer or exchange offer. Upon consummation of any such transaction contemplated by this Section 13(d), all Rights hereunder shall
expire. 
 Section 14. Fractional Rights and Fractional Shares. 

(a) The Company shall not be required to issue fractions of Rights, except prior to the Distribution Date as provided in Section 11(p)
hereof, or to distribute Rights Certificates which evidence fractional Rights. In lieu of such fractional Rights, the Company shall pay to the registered holders of the Rights Certificates with regard to which such fractional Rights would otherwise
be issuable, an amount in cash equal to the same fraction of the current market value of a whole Right. For purposes of this Section 14(a), the current market value of a whole Right shall be the closing price of the Rights for the Trading Day
immediately prior to the date on which such fractional Rights would have been otherwise issuable. The closing price of the Rights for any Trading Day shall be the last sale price, regular way, or, in case no such sale takes place on such day, the
average of the closing bid and asked prices, regular way, in either case as reported in the principal consolidated transaction reporting system with respect to securities listed or admitted to trading on NASDAQ or, if the Rights are not listed or
admitted to trading on NASDAQ, as reported in the principal consolidated transaction reporting system with respect to securities listed on the principal national securities exchange on which the Rights are listed or admitted to trading, or if the
Rights are not listed or admitted to trading on any national securities exchange, the last quoted price or, if not so quoted, the average of the high bid and low asked prices in the over the counter market, as reported by NASDAQ or such other system
then in use or, if on any such date the Rights are not quoted by any such organization, the average of the closing bid and asked prices as furnished by a professional market maker making a market in the Rights, selected by the Board. If on any such
date no such market maker is making a market in the 

  
 21 

 
Rights, the fair value of the Rights on such date as determined in good faith by the Board shall be used, which determination shall be described in a statement filed with the Rights Agent that
shall be binding on the Rights Agent and holders of Rights. 
 (b) The Company shall not be required to issue fractions of shares of
Preferred Stock (other than fractions which are integral multiples of one one-thousandth of a share of Preferred Stock) upon exercise of the Rights or to distribute certificates which evidence fractional shares of Preferred Stock (other than
fractions which are integral multiples of one one-thousandth of a share of Preferred Stock). In lieu of fractional shares of Preferred Stock that are not integral multiples of one one-thousandth of a share of Preferred Stock, the Company may pay to
the registered holders of Rights Certificates at the time such Rights are exercised as herein provided an amount in cash equal to the same fraction of the current market value of one one-thousandth of a share of Preferred Stock. For purposes of this
Section 14(b), the current market value of one one-thousandth of a share of Preferred Stock shall be one one-thousandth of the closing price of a share of Preferred Stock (as determined pursuant to Section 11(d)(ii) hereof) for the Trading
Day immediately prior to the date of such exercise. 
 (c) Following the occurrence of a Triggering Event, the Company shall not be
required to issue fractions of shares of Common Stock upon exercise of the Rights or to distribute certificates which evidence fractional shares of Common Stock. In lieu of fractional shares of Common Stock, the Company may pay to the registered
holders of Rights Certificates at the time such Rights are exercised as herein provided an amount in cash equal to the same fraction of the current market value of one (1) share of Common Stock. For purposes of this Section 14(c), the
current market value of one share of Common Stock shall be the closing price per share of Common Stock (as determined pursuant to Section 11(d)(i) hereof) on the Trading Day immediately prior to the date of such exercise. 

(d) The holder of a Right by the acceptance of the Rights expressly waives such holder’s right to receive any fractional Rights or any
fractional shares upon exercise of a Right, except as permitted by this Section 14. 
 (e) Whenever a payment for fractional Rights or
fractional Shares is to be made by the Rights Agent under any Section of this Agreement, the Company shall (i) promptly prepare and deliver to the Rights Agent a certificate setting forth in reasonable detail the facts related to such payment
and the prices and/or formulas utilized in calculating such payments, and (ii) provide sufficient monies to the Rights Agent in the form of fully collected funds to make such payments. The Rights Agent shall be fully protected in relying upon
such a certificate and shall have no duty with respect to, and shall not be deemed to have knowledge of any payment for fractional Rights or fractional shares under any Section of this Agreement relating to the payment of fractional Rights or
fractional shares unless and until the Rights Agent shall have received such a certificate and sufficient monies. 
 Section 15.
Rights of Action. All rights of action in respect of this Agreement, except those rights of action given to the Rights Agent hereunder, are vested in the respective registered holders of the Rights Certificates (and, prior to the Distribution
Date, the registered holders of the Common Stock); and any registered holder of any Rights Certificate (or, prior to the Distribution Date, of the Common Stock), without the consent of the Rights Agent or of the holder of any other Rights
Certificate (or, prior to the Distribution Date, of the Common Stock), may, in such holder’s own behalf and for such holder’s own benefit, enforce, and may institute and maintain any suit, action or proceeding against the Company to
enforce, or otherwise act in respect of, such holder’s right to exercise the Rights evidenced by such Rights Certificate in the manner provided in such Rights Certificate and in this Agreement. Without limiting the foregoing or any remedies
available to the holders of Rights, it is specifically acknowledged that the holders of Rights would not have an adequate remedy at law for any breach by the Company of this Agreement and shall be entitled to specific performance of the obligations
hereunder and injunctive relief against actual or threatened violations by the Company of the obligations hereunder of any Person subject to this Agreement. 

Section 16. Agreement of Rights Holders. Every holder of a Right by accepting the same consents and agrees with the Company and
the Rights Agent and with every other holder of a Right that: 
 (a) prior to the Distribution Date, the Rights will be transferable only
in connection with the transfer of shares of Common Stock; 
 (b) after the Distribution Date, the Rights Certificates are transferable
only on the registry books of the Rights Agent if surrendered at the office or offices of the Rights Agent designated for such purposes, duly endorsed or accompanied by a proper instrument of transfer and with the appropriate forms and certificates
properly completed and fully executed; 
 (c) subject to Section 6(a) and Section 7(f) hereof, the Company and the Rights Agent
may deem and treat the Person in whose name a Rights Certificate (or, prior to the Distribution Date, the associated Common Stock certificate (or book 

  
 22 

 
entry shares in respect of Common Stock)) is registered as the absolute owner thereof and of the Rights evidenced thereby (notwithstanding any notations of ownership or writing on the Rights
Certificates or the associated Common Stock certificate (or notices provided to holders of book entry shares of Common Stock) made by anyone other than the Company or the Rights Agent) for all purposes whatsoever, and neither the Company nor the
Rights Agent, subject to the last sentence of Section 7(e) hereof, shall be required to be affected by any notice to the contrary; and 

(d) notwithstanding anything in this Agreement to the contrary, neither the Company nor the Rights Agent shall have any liability to any
holder of a Right or other Person as a result of the inability of the Company or the Rights Agent to perform any of its or their obligations under this Agreement by reason of any preliminary or permanent injunction or other order, judgment, decree
or ruling (whether interlocutory or final) issued by a court of competent jurisdiction or by a governmental, regulatory, self-regulatory or administrative agency or commission, or any statute, rule, regulation or executive order promulgated or
enacted by any governmental authority, prohibiting or otherwise restraining performance of such obligation; provided, however, the Company shall use its best efforts to have any such injunction, order, judgment, decree or ruling lifted
or otherwise overturned as soon as possible. 
 Section 17. Rights Certificate Holder Not Deemed a Stockholder. No holder, as
such, of any Rights Certificate shall be entitled to vote, receive dividends or be deemed for any purpose the holder of the number of one one-thousandths of a share of Preferred Stock or any other securities of the Company which may at any time be
issuable on the exercise or exchange of the Rights represented thereby, nor shall anything contained herein or in any Rights Certificate be construed to confer upon the holder of any Rights Certificate, as such, any of the rights of a stockholder of
the Company or any right to vote for the election of directors or upon any matter submitted to stockholders at any meeting thereof, or to give or withhold consent to any corporate action, or to receive notice of meetings or other actions affecting
stockholders (except as provided in Section 25 hereof), or to receive dividends or subscription rights, or otherwise, until the Right or Rights evidenced by such Rights Certificate shall have been exercised or exchanged in accordance with the
provisions hereof. 
 Section 18. Concerning the Rights Agent. 

(a) The Company agrees to pay to the Rights Agent reasonable compensation for all services rendered by it hereunder and, from time to time,
on demand of the Rights Agent, its reasonable expenses and counsel fees and disbursements and other disbursements incurred in the preparation, negotiation, delivery, amendment, administration and execution of this Agreement and the exercise and
performance of its duties hereunder. The Company also agrees to indemnify the Rights Agent for, and to hold it harmless against, any loss, liability, damage, judgment, fine, penalty, claim, demand, settlement, cost or expense (including, without
limitation, the reasonable fees and expenses of counsel), incurred without gross negligence, bad faith or willful misconduct on the part of the Rights Agent (which gross negligence, bad faith or willful misconduct must be determined by a final,
non-appealable judgment of a court of competent jurisdiction), for any action taken, suffered, or omitted to be taken by the Rights Agent in connection with the acceptance, administration, exercise and performance of its duties under this Agreement,
including, without limitation, the costs and expenses of defending against any claim of liability and appealing any claim of liability arising therefrom, directly or indirectly. The provisions of this Section 18 and Section 20 below shall
survive the termination of this Agreement, the exercise or expiration of the Rights and the resignation, replacement or removal of the Rights Agent. The costs and expenses incurred in enforcing this right of indemnification shall be paid by the
Company. 
 (b) The Rights Agent shall be authorized to rely conclusively on, and shall be protected and shall incur no liability for or in
respect of any action taken, suffered or omitted to be taken by it in connection with its acceptance and administration of this Agreement and in the exercise and performance of its duties hereunder, in reliance upon any Rights Certificate or
certificate for Common Stock or, in the case of uncertificated shares, the associated balance indicated in the book-entry account system of the transfer agent for the Common Stock, or for other securities of the Company, instrument of assignment or
transfer, power of attorney, endorsement, affidavit, letter, notice, direction, consent, certificate, statement, or other paper or document believed by it, in the absence of gross negligence, bad faith or willful misconduct (which gross negligence,
bad faith or willful misconduct must be determined by a final, non-appealable judgment of a court of competent jurisdiction), to be genuine and to be signed, executed and, where necessary, verified or acknowledged, by the proper Person or Persons or
otherwise upon the advice of counsel as set forth in Section 20 of this Agreement. The Rights Agent shall not be deemed to have any knowledge of any event of which it was supposed to receive notice thereof hereunder, and the Rights Agent shall
be fully protected and shall incur no liability for failing to take action in connection therewith unless and until it has received such notice in writing. 

  
 23 

 Section 19. Merger or Consolidation or Change of Name of Rights Agent. 

(a) Any Person into which the Rights Agent or any successor Rights Agent may be merged or with which it may be consolidated, or any Person
resulting from any merger or consolidation to which the Rights Agent or any successor Rights Agent shall be a party, or any Person succeeding to the shareholder services business of the Rights Agent or any successor Rights Agent, shall be the
successor to the Rights Agent under this Agreement without the execution or filing of any paper or any further act on the part of any of the parties hereto; but only if such Person would be eligible for appointment as a successor Rights Agent under
the provisions of Section 21 hereof. The purchase of all or substantially all of the Rights Agent’s assets employed in the performance of transfer agent activities shall be deemed a merger or consolidation for purposes of this
Section 19. In case at the time such successor Rights Agent shall succeed to the agency created by this Agreement, any of the Rights Certificates shall have been countersigned but not delivered, any such successor Rights Agent may adopt the
countersignature of a predecessor Rights Agent and deliver such Rights Certificates so countersigned; and in case at that time any of the Rights Certificates shall not have been countersigned, any successor Rights Agent may countersign such Rights
Certificates either in the name of the predecessor Rights Agent or in the name of the successor Rights Agent; and in all such cases such Rights Certificates shall have the full force provided in the Rights Certificates and in this Agreement. 

(b) In case at any time the name of the Rights Agent shall be changed and at such time any of the Rights Certificates shall have been
countersigned but not delivered, the Rights Agent may adopt the countersignature under its prior name and deliver Rights Certificates so countersigned; and in case at that time any of the Rights Certificates shall not have been countersigned, the
Rights Agent may countersign such Rights Certificates either in its prior name or in its changed name; and in all such cases such Rights Certificates shall have the full force provided in the Rights Certificates and in this Agreement. 

Section 20. Duties of Rights Agent. The Rights Agent undertakes to perform the duties and obligations expressly imposed by this
Agreement (and no implied duties or obligations) upon the following terms and conditions, by all of which the Company and the holders of Rights Certificates, by their acceptance thereof, shall be bound: 

(a) Before the Rights Agent acts or refrains from acting, the Rights Agent may consult with legal counsel selected by it (who may be legal
counsel for the Company or an employee of the Rights Agent), and the opinion or advice of such counsel shall be full and complete authorization and protection to the Rights Agent and the Rights Agent shall incur no liability for or in respect of any
action taken, suffered or omitted to be taken by it in the absence of gross negligence, bad faith and willful misconduct (which gross negligence, bad faith or willful misconduct must be determined by a final, non-appealable judgment of a court of
competent jurisdiction) and in accordance with such opinion or advice. 
 (b) Whenever in the performance of its duties under this
Agreement the Rights Agent shall deem it necessary or desirable that any fact or matter (including, without limitation, the identity of any Acquiring Person and the determination of Current Market Price) be proved or established by the Company prior
to taking, suffering or omitting to take any action hereunder, such fact or matter (unless other evidence in respect thereof be herein specifically prescribed) may be deemed to be conclusively proved and established by a certificate signed by the
Chairman of the Board, the Chief Executive Officer, the Chief Financial Officer, the President, any Vice President, the Treasurer, any Assistant Treasurer, the Secretary or any Assistant Secretary of the Company and delivered to the Rights Agent;
and such certificate shall be full and complete authorization and protection to the Rights Agent and the Rights Agent shall incur no liability for or in respect of any action taken, suffered or omitted to be taken in the absence of gross negligence,
bad faith or willful misconduct (which gross negligence, bad faith or willful misconduct must be determined by a final, non-appealable judgment of a court of competent jurisdiction) by it under the provisions of this Agreement in reliance upon such
certificate. 
 (c) The Rights Agent shall be liable hereunder to the Company and any other Person only for its own gross negligence, bad
faith or willful misconduct (each as determined by a final, non-appealable judgment of a court of competent jurisdiction). Anything to the contrary notwithstanding, in no event shall the Rights Agent be liable for special, punitive, indirect,
consequential or incidental loss or damage of any kind whatsoever (including but not limited to lost profits), even if the Rights Agent has been advised of the likelihood of such loss or damage. Any liability of the Rights Agent under this Agreement
will be limited to the amount of annual fees paid by the Company to the Rights Agent. 
 (d) The Rights Agent shall not be liable for or by
reason of any of the statements of fact or recitals contained in this Agreement or in the Rights Certificates or be required to verify the same (except as to its countersignature on such Rights Certificates), but all such statements and recitals are
and shall be deemed to have been made by the Company only. 

  
 24 

 (e) The Rights Agent shall not have any liability for or be under any responsibility in respect
of the validity of this Agreement or the execution and delivery hereof (except the due execution hereof by the Rights Agent) or in respect of the validity or execution of any Rights Certificate (except its countersignature thereof); nor shall it be
responsible for any change in the exercisability of Rights (including Rights becoming null and void pursuant to Section 7(e) hereof) except with respect to the exercise of Rights evidenced by Rights Certificates after actual notice of such
change; nor shall it be responsible for any breach by the Company of any covenant or condition contained in this Agreement or in any Rights Certificate; nor shall it be responsible for any adjustment or change required under the provisions of
Section 11, Section 13 or Section 24 hereof or responsible for the manner, method or amount of any such adjustment or change or the ascertaining of the existence of facts that would require any such adjustment (except with respect to
the exercise of Rights evidenced by Rights Certificates after receipt by the Rights Agent of a certificate furnished pursuant to Section 12 hereof describing such change or adjustment upon which the Rights Agent may rely); nor shall it be
responsible for any determination by the Board of the current market value of the Rights or Preferred Stock or Common Stock pursuant to the provisions of Section 14 hereof; nor shall it by any act hereunder be deemed to make any representation
or warranty as to the authorization or reservation of any shares of Common Stock or Preferred Stock to be issued pursuant to this Agreement or any Rights Certificate or as to whether any shares of Common Stock or Preferred Stock will, when so
issued, be validly authorized and issued, fully paid and nonassessable. 
 (f) The Company agrees that it will perform, execute,
acknowledge and deliver or cause to be performed, executed, acknowledged and delivered all such further and other acts, instruments and assurances as may reasonably be required by the Rights Agent for the carrying out or performing by the Rights
Agent of its duties under this Agreement. 
 (g) The Rights Agent is hereby authorized and directed to accept instructions with respect to
the performance of its duties hereunder and certificates delivered pursuant to any provision hereof from the Chairman of the Board, the Chief Executive Officer, the Chief Financial Officer, the President, any Vice President, the Secretary, any
Assistant Secretary, the Treasurer or any Assistant Treasurer of the Company, and is authorized to apply to such officers for advice or instructions in connection with its duties, and such advice and instructions shall be full authorization and
protection to the Rights Agent and the Rights Agent shall not be liable for or in respect of any action taken, suffered, or omitted to be taken by it in accordance with written advice or instructions of any such officer or for any delay in acting
while waiting for those instructions. The Rights Agent shall be fully authorized and protected in relying upon the most recent instructions received by any such officer. 

(h) The Rights Agent and any member, stockholder, affiliate, director, officer or employee of the Rights Agent may buy, sell or deal in any
of the Rights or other securities of the Company or become pecuniarily interested in any transaction in which the Company may be interested, or contract with or lend money to the Company or otherwise act as fully and freely as though it were not the
Rights Agent under this Agreement. Nothing herein shall preclude the Rights Agent or any such stockholder, affiliate, director, officer or employee from acting in any other capacity for the Company or for any other Person. 

(i) The Rights Agent may execute and exercise any of the rights or powers hereby vested in it or perform any duty hereunder either itself
(through its directors, officers and employees) or by or through its attorneys or agents, and the Rights Agent shall not be answerable or accountable for any act, omission, default, neglect or misconduct of any such attorneys or agents or for any
loss to the Company, to the holders of the Rights or any other Person resulting from any such act, omission, default, neglect or misconduct, absent gross negligence, bad faith or willful misconduct in the continued employment thereof (each as
determined by a final, non-appealable judgment of a court of competent jurisdiction). 
 (j) No provision of this Agreement shall require
the Rights Agent to expend or risk its own funds or otherwise incur any financial liability in the performance of any of its duties hereunder (other than internal costs incurred by the Rights Agent in providing services to the Company in the
ordinary course of its business as Rights Agent) or in the exercise of its rights if it reasonably believes, after consultation with counsel, that repayment of such funds or adequate indemnification against such risk or liability is not reasonably
assured to it. 
 (k) If, with respect to any Rights Certificate surrendered to the Rights Agent for exercise or transfer, the certificate
attached to the form of assignment or form of election to purchase, as the case may be, has either not been properly completed or indicates an affirmative response to clause 1 and/or 2 thereof, the Rights Agent shall not take any further action with
respect to such requested exercise or transfer without first consulting with the Company. 
 (l) The Rights Agent shall not be required to
take notice or be deemed to have notice of any fact, event or determination (including, without limitation, any dates or events defined in this Rights Agreement or the designation of any 

  
 25 

 
Person as an Acquiring Person, Affiliate or Associate) under this Rights Agreement unless and until the Rights Agent shall be specifically notified in writing by the Company of such fact, event
or determination. 
 Section 21. Change of Rights Agent. The Rights Agent or any successor Rights Agent may resign and be
discharged from its duties under this Agreement upon thirty (30) days’ notice in writing mailed to the Company, and to each transfer agent of the Common Stock and Preferred Stock known to the Rights Agent, by registered or certified mail
at the expense of the Company, and, if such resignation occurs after the Distribution Date, to the registered holders of the Rights Certificates by first class mail. In the event the transfer agency relationship in effect between the Company and the
Rights Agent terminates, the Rights Agent will be deemed to resign automatically on the effective date of such termination; and any required notice will be sent by the Company. The Company may remove the Rights Agent or any successor Rights Agent
upon thirty (30) days’ notice in writing, mailed to the Rights Agent or successor Rights Agent, as the case may be, and to each transfer agent of the Common Stock and Preferred Stock, by registered or certified mail, and, if such removal
occurs after the Distribution Date, to the holders of the Rights Certificates by first class mail. If the Rights Agent shall resign or be removed or shall otherwise become incapable of acting, the Company shall appoint a successor to the Rights
Agent. If the Company shall fail to make such appointment within a period of thirty (30) days after giving notice of such removal or after it has been notified in writing of such resignation or incapacity by the resigning or incapacitated
Rights Agent or by the holder of a Rights Certificate (who shall, with such notice, submit his Rights Certificate for inspection by the Company), then the Rights Agent or any registered holder of any Rights Certificate may apply at the expense of
the Company to any court of competent jurisdiction for the appointment of a new Rights Agent. Any successor Rights Agent, whether appointed by the Company or by such a court, shall either be (a) a Person organized and doing business under the
laws of the United States or any state of the United States, in good standing, which is authorized under such laws to exercise stock transfer or stockholder services powers or (b) an affiliate of a Person described in clause (a) of this
sentence. After appointment, the successor Rights Agent shall be vested with the same powers, rights, duties and responsibilities as if it had been originally named as Rights Agent without further act or deed; but the predecessor Rights Agent shall
deliver and transfer to the successor Rights Agent any property at the time held by it hereunder, and execute and deliver any further assurance, conveyance, act or deed necessary for the purpose; and, except as the context herein otherwise requires,
such successor Rights Agent shall be deemed to be the “Rights Agent” for all purposes of this Agreement. Not later than the effective date of any such appointment, the Company shall file notice thereof in writing with the predecessor
Rights Agent and each transfer agent of the Common Stock and the Preferred Stock, and, if such appointment occurs after the Distribution Date, mail a notice thereof in writing to the registered holders of the Rights Certificates. Failure to give any
notice provided for in this Section 21, however, or any defect therein, shall not affect the legality or validity of the resignation or removal of the Rights Agent or the appointment of the successor Rights Agent, as the case may be. 

Section 22. Issuance of New Rights Certificates. Notwithstanding any of the provisions of this Agreement or of the Rights to the
contrary, the Company may, at its option, issue new Rights Certificates evidencing Rights in such form as may be approved by the Board to reflect any adjustment or change in the Purchase Price and the number or kind or class of shares or other
securities or property purchasable under the Rights Certificates made in accordance with the provisions of this Agreement. In addition, in connection with the issuance or sale of shares of Common Stock following the Distribution Date and prior to
the redemption, exchange or expiration of the Rights, the Company (a) shall, with respect to shares of Common Stock so issued or sold pursuant to the exercise of stock options or under any employee benefit plan or arrangement, granted or
awarded as of the Distribution Date, or upon the exercise, conversion or exchange of securities hereinafter issued by the Company (except as may otherwise be provided in the instrument(s) governing such securities), and (b) may, in any other
case, if deemed necessary or appropriate by the Board, issue Rights Certificates representing the appropriate number of Rights in connection with such issuance or sale; provided, however, that (i) no such Rights Certificate shall
be issued if, and to the extent that, the Company shall be advised by counsel that such issuance would create a significant risk of material adverse tax consequences to the Company or the Person to whom such Rights Certificate would be issued, and
(ii) no such Rights Certificate shall be issued if, and to the extent that, appropriate adjustment shall otherwise have been made in lieu of the issuance thereof. 

Section 23. Redemption and Termination. 

(a) The Board may, at its option, at any time prior to the earlier of (i) the close of business on the tenth Business Day following the
Stock Acquisition Date (or, if the Stock Acquisition Date shall have occurred prior to the Record Date, the close of business on the tenth Business Day following the Record Date), or (ii) the Final Expiration Date, redeem all but not less than
all of the then outstanding Rights at a redemption price of $0.001 per Right, as such amount may be appropriately adjusted to reflect any stock split, stock dividend or similar transaction occurring after the date hereof (such redemption price being
hereinafter referred to as the “Redemption Price”). Notwithstanding anything contained in this Agreement to the contrary, the 

  
 26 

 
Rights shall not be exercisable after the first occurrence of a Section 11(a)(ii) Event until such time as the Company’s right of redemption hereunder has expired. The Company may, at
its option, pay the Redemption Price in cash, shares of Common Stock (based on the Current Market Price of the Common Stock at the time of redemption) or any other form of consideration deemed appropriate by the Board. 

(b) Immediately upon the action of the Board ordering the redemption of the Rights, evidence of which shall have been filed with the Rights
Agent and without any further action and without any notice, the right to exercise the Rights will terminate and the only right thereafter of the holders of Rights shall be to receive the Redemption Price for each Right so held. The Company shall
promptly give public notice of any such redemption (with prompt written notice thereof to the Rights Agent); provided, however, that the failure to give, or any defect in, such notice shall not affect the legality or validity of such redemption.
Promptly after the action of the Board ordering the redemption of the Rights, the Company shall give notice of such redemption to the Rights Agent and the holders of the then outstanding Rights by mailing such notice to all such holders at each
holder’s last address as it appears upon the registry books of the Rights Agent or, prior to the Distribution Date, on the registry books of the transfer agent for the Common Stock. Any notice which is mailed in the manner herein provided shall
be deemed given, whether or not the holder receives the notice. Each such notice of redemption will state the method by which the payment of the Redemption Price will be made. 

Section 24. Exchange. 

(a) The Board may, at its option, at any time after any Person becomes an Acquiring Person, exchange all or part of the then outstanding and
exercisable Rights (which shall not include Rights that have become null and void pursuant to the provisions of Section 7(e) hereof) for Common Stock at an exchange ratio of one share of Common Stock per Right, appropriately adjusted to reflect
any stock split, stock dividend or similar transaction occurring after the date hereof (such exchange ratio being hereinafter referred to as the “Exchange Ratio”). Notwithstanding the foregoing, the Board shall not be empowered to effect
such exchange at any time after (i) any Person (other than the Company, any Subsidiary of the Company, any employee benefit plan of the Company or any such Subsidiary, or any entity holding Common Stock for or pursuant to the terms of any such
plan), together with all Affiliates and Associates of such Person, becomes the Beneficial Owner of fifty percent (50%) or more of the Common Stock then outstanding or (ii) the occurrence of an event specified in Section 13(a) hereof.

 (b) Immediately upon the action of the Board ordering the exchange of any Rights pursuant to subsection (a) of this Section 24
and without any further action and without any notice, the right to exercise such Rights shall terminate and the only right thereafter of a holder of such Rights shall be to receive that number of shares of Common Stock equal to the number of such
Rights held by such holder multiplied by the Exchange Ratio. The Company shall promptly give public notice of any such exchange (with prompt written notice thereof to the Rights Agent); provided, however, that the failure to give, or
any defect in, such notice shall not affect the legality or validity of such exchange. The Company promptly shall mail a notice of any such exchange to all of the holders of such Rights at their last addresses as they appear upon the registry books
of the Rights Agent. Any notice that is mailed in the manner herein provided shall be deemed given, whether or not the holder receives the notice. Each such notice of exchange will state the method by which the exchange of the Common Stock for
Rights will be effected and, in the event of any partial exchange, the number of Rights that will be exchanged. Any partial exchange shall be effected pro rata based on the number of Rights (other than Rights which have become null and void pursuant
to the provisions of Section 7(e) hereof) held by each holder of Rights. 
 (c) Following the action of the Board ordering the
exchange of any Rights pursuant to subsection (a) of this Section 24, the Company may implement such procedures in its sole discretion as it deems appropriate for the purpose of ensuring that the Common Stock (or such other consideration)
issuable upon an exchange pursuant to this Section 24 not be received by holders of Rights that have become null and void pursuant to Section 7(e) hereof. In furtherance thereof, if so directed by the Company, all or a portion of the
shares of Common Stock (or other consideration) potentially issuable to holders of Rights upon an exchange pursuant to this Section 24, who have not verified to the satisfaction of the Company, in its sole discretion, that they are not
Acquiring Persons, may be deposited in a trust established by the Company pending receipt of appropriate verification. 
 (d) In any
exchange pursuant to this Section 24, the Company, at its option, may substitute Preferred Stock (or Equivalent Preferred Stock) for Common Stock exchangeable for Rights, at the initial rate of one one-thousandth of a share of Preferred Stock
(or Equivalent Preferred Stock) for each share of Common Stock, as appropriately adjusted to reflect stock splits, stock dividends and other similar transactions after the date hereof. 

  
 27 

 (e) In the event that there shall not be sufficient shares of Common Stock issued but not
outstanding or authorized but unissued to permit any exchange of Rights as contemplated in accordance with this Section 24, the Company shall take all such action as may be necessary to authorize additional shares of Common Stock for issuance
upon exchange of the Rights. 
 (f) The Company shall not be required to issue fractions of shares of Common Stock or to distribute
certificates which evidence fractional shares of Common Stock. In lieu of such fractional shares of Common Stock, there shall be paid to the registered holders of the Rights Certificates with regard to which such fractional shares of Common Stock
would otherwise be issuable, an amount in cash equal to the same fraction of the current market value of a whole share of Common Stock. For the purposes of this subsection (f), the current market value of a whole share of Common Stock shall be the
closing price of a share of Common Stock (as determined pursuant to the second sentence of Section 11(d)(i) hereof) for the Trading Day immediately prior to the date of exchange pursuant to this Section 24. 

Section 25. Notice of Certain Events. 

(a) In case the Company shall propose, at any time after the Distribution Date, (i) to pay any dividend payable in stock of any class to
the holders of Preferred Stock or to make any other distribution to the holders of Preferred Stock (other than a regular quarterly cash dividend out of earnings or retained earnings of the Company), or (ii) to offer to the holders of Preferred
Stock rights or warrants to subscribe for or to purchase any additional shares of Preferred Stock or shares of stock of any class or any other securities, rights or options, or (iii) to effect any reclassification of its Preferred Stock (other
than a reclassification involving only the subdivision of outstanding shares of Preferred Stock), or (iv) to effect any consolidation or merger into or with any other Person (other than a Subsidiary of the Company in a transaction which
complies with Section 11(o) hereof), or to effect any sale or other transfer (or to permit one or more of its Subsidiaries to effect any sale or other transfer), in one transaction or a series of related transactions, of more than fifty percent
(50%) of the assets, cash flow or earning power of the Company and its Subsidiaries (taken as a whole) to any other Person or Persons (other than the Company and/or any of its Subsidiaries in one or more transactions each of which complies with
Section 11(o) hereof), or (v) to effect the liquidation, dissolution or winding up of the Company, then, in each such case, the Company shall give to the Rights Agent and, to the extent feasible, to each holder of a Rights Certificate in
accordance with Section 26 hereof, a notice of such proposed action, which shall specify the record date for the purposes of such stock dividend, distribution of rights or warrants, or the date on which such reclassification, consolidation,
merger, sale, transfer, liquidation, dissolution, or winding up is to take place and the date of participation therein by the holders of the shares of Preferred Stock, if any such date is to be fixed, and such notice shall be so given in the case of
any action covered by clause (i) or (ii) above at least twenty (20) days prior to but not including the record date for determining holders of the shares of Preferred Stock for purposes of such action, and in the case of any such
other action, at least twenty (20) days prior to but not including the date of the taking of such proposed action or the date of participation therein by the holders of the shares of Preferred Stock, whichever shall be the earlier. 

(b) In case any of the events set forth in Section 11(a)(ii) hereof shall occur, then, in any such case, (i) the Company shall as
soon as practicable thereafter give to the Rights Agent and, to the extent feasible, each holder of a Rights Certificate, and in accordance with Section 26 hereof, a notice of the occurrence of such event, which shall specify the event and the
consequences of the event to holders of Rights under Section 11(a)(ii) hereof, and (ii) all references in the preceding paragraph to Preferred Stock shall be deemed thereafter to refer to Common Stock and/or, if appropriate, other
securities. 
 (c) Notwithstanding anything in this Agreement to the contrary, the Company shall not be required to give any notice
hereunder to any holder of a Rights Certificate solely as a result of (i) the approval, execution, delivery, announcement or performance of the Purchase Agreement; (ii) the consummation of the Cambridge LP Acquisition or any of the other
transactions contemplated in the Purchase Agreement or (iii) the exercise of the warrant issued to the Investor pursuant to the Purchase Agreement. 

  
 28 

 Section 26. Notices. Notices or demands authorized by this Agreement to be given or
made by the Rights Agent or by the holder of any Rights Certificate to or on the Company shall be sufficiently given or made if in writing and sent or delivered by recognized national overnight delivery service or first-class mail, postage prepaid,
addressed (until another address is filed in writing with the Rights Agent by the Company) as follows: 
 Sorrento Therapeutics, Inc. 

6042 Cornerstone Ct. West, Suite B 

San Diego, CA 92121 
 Attention:
CFO 
 Fax: 
 with a copy (which
will not constitute notice) to: 
 Sichenzia Ross Friedman Ference LLP 

61 Broadway, 32nd Floor 

New York, NY 10006 
 Attention:
Jeffrey J. Fessler 
 Fax: (212) 202-7735 

Subject to the provisions of Section 21, any notice or demand authorized by this Agreement to be given or made by the Company or by the holder of any
Rights Certificate to or on the Rights Agent shall be sufficiently given or made if in writing and sent or delivered by recognized national overnight delivery service or first class mail, postage prepaid, addressed (until another address is filed in
writing by the Rights Agent with the Company) as follows: 
 Philadelphia Stock Transfer, Inc. 

2320 Haverford Roard 
 Suite 230

 Ardmore, PA 19003 

Attention: Client Services 
 Fax:
484-416-3597 
 Notices or demands authorized by this Agreement to be given or made by the Company or the Rights Agent to the holder of any
Rights Certificate (or, if prior to the Distribution Date, to the holder of shares of Common Stock) shall be sufficiently given or made if in writing and sent or delivered by recognized national overnight delivery service or by first-class mail,
postage prepaid, addressed to such holder at the address of such holder as shown on the registry books of the Company. 
 Section 27.
Supplements and Amendments. Subject to the last sentence of this Section 27, prior to the Distribution Date, the Company may and, if so directed by the Company, the Rights Agent shall supplement or amend any provision of this Agreement
without the approval of any holders of shares of Common Stock. From and after the Distribution Date, the Company may and the Rights Agent shall, if the Company so directs, supplement or amend this Agreement without the approval of any holders of
Rights Certificates in order to (i) cure any ambiguity, (ii) correct or supplement any provision contained herein which may be defective or inconsistent with any other provisions herein, (iii) shorten or lengthen any time period
hereunder or (iv) change or supplement the provisions hereunder in any manner which the Company may deem necessary or desirable and which shall not adversely affect the interests of the holders of Rights Certificates (other than an Acquiring
Person or an Affiliate or Associate of an Acquiring Person). Upon the delivery of a certificate from an appropriate officer of the Company that states that the proposed supplement or amendment is in compliance with the terms of this Section 27,
the Rights Agent shall execute such supplement or amendment. Notwithstanding anything herein to the contrary, this Agreement may not be amended (other than pursuant to clauses (i) or (ii) of the preceding sentence) at a time when the
Rights are not redeemable. Notwithstanding anything contained in this Agreement to the contrary, the Rights Agent may, but shall not be obligated to, enter into any supplement or amendment that affects the Rights Agent’s own rights, duties and
obligations or immunities under this Agreement and it shall not be bound by any such supplement or amendment not executed by it. 

Section 28. Successors. All the covenants and provisions of this Agreement by or for the benefit of the Company or the Rights
Agent shall bind and inure to the benefit of their respective successors and assigns hereunder. 

  
 29 

 Section 29. Determinations and Actions by the Board, etc. For all purposes of this
Agreement, any calculation of the number of shares of Common Stock or any other class of capital stock outstanding at any particular time, including for purposes of determining the particular percentage of such outstanding shares of Common Stock of
which any Person is the Beneficial Owner, shall be made in accordance with the last sentence of Rule 13d-3(d)(1)(i) of the General Rules and Regulations under the Exchange Act. The Board shall have the exclusive power and authority to administer
this Agreement and to exercise all rights and powers specifically granted to the Board or to the Company, or as may be necessary or advisable in the administration of this Agreement, including the right and power to (i) interpret the provisions
of this Agreement and (ii) make all determinations deemed necessary or advisable for the administration of this Agreement (including a determination to redeem or not redeem the Rights or to amend the Agreement). All such actions, calculations,
interpretations and determinations (including, for purposes of clause (y) below, all omissions with respect to the foregoing) which are done or made by the Board in good faith, shall (x) be final, conclusive and binding on the Company, the
Rights Agent, the holders of the Rights and all other Persons, and (y) not subject the Board, or any of the directors on the Board to any liability to the holders of the Rights. The Rights Agent shall always be entitled to assume that the Board
acted in good faith and shall be fully protected and incur no liability in reliance thereon. 
 Section 30. Benefits of this
Agreement. Nothing in this Agreement shall be construed to give to any Person other than the Company, the Rights Agent and the registered holders of the Rights Certificates (and, prior to the Distribution Date, registered holders of the Common
Stock) any legal or equitable right, remedy or claim under this Agreement; but this Agreement shall be for the sole and exclusive benefit of the Company, the Rights Agent and the registered holders of the Rights Certificates (and, prior to the
Distribution Date, registered holders of the Common Stock). 
 Section 31. Severability. If any term, provision, covenant or
restriction of this Agreement is held by a court of competent jurisdiction or other authority to be invalid, void or unenforceable, the remainder of the terms, provisions, covenants and restrictions of this Agreement shall remain in full force and
effect and shall in no way be affected, impaired or invalidated; provided, however, that if such excluded provision shall affect the rights, immunities, duties or obligations of the Rights Agent, the Rights Agent shall be entitled to
resign immediately upon written notice to the Company; provided, however, that notwithstanding anything in this Agreement to the contrary, if any such term, provision, covenant or restriction is held by such court or authority to be
invalid, void or unenforceable and the Board determines in its good faith judgment that severing the invalid language from this Agreement would adversely affect the purpose or effect of this Agreement, the right of redemption set forth in
Section 23 hereof shall be reinstated and shall not expire until the close of business on the tenth Business Day following the date of such determination by the Board. Without limiting the foregoing, if any provision requiring a specific group
of directors to act is held to by any court of competent jurisdiction or other authority to be invalid, void or unenforceable, such determination shall then be made by the Board in accordance with applicable law and the Company’s restated
certificate of incorporation, as amended, and amended and restated bylaws. 
 Section 32. Governing Law. This Agreement, each
Right and each Rights Certificate issued hereunder shall be deemed to be a contract made under the laws of the State of Delaware and for all purposes shall be governed by and construed in accordance with the laws of such State applicable to
contracts made and to be performed entirely within such State; provided, however, that all provisions regarding the rights, duties and obligations of the Rights Agent shall be governed by and construed in accordance with the laws of the State of New
York applicable to contracts made and to be performed entirely within the State of New York, without regard to the principles or rules concerning conflicts of laws which might otherwise require application of the substantive laws of another
jurisdiction. 
 Section 33. Counterparts. This Agreement may be executed in any number of counterparts and each of such
counterparts shall for all purposes be deemed to be an original, and all such counterparts shall together constitute but one and the same instrument. A signature to this Agreement transmitted electronically shall have the same authority, effect and
enforceability as an original signature. 
 Section 34. Descriptive Headings; Interpretation. 

(a) Descriptive headings of the several sections of this Agreement are inserted for convenience only and shall not control or affect the
meaning or construction of any of the provisions hereof. 
 (b) Whenever the words “include,” “includes” or
“including” are used in this Agreement, they shall be deemed to be followed by the words “without limitation.” 

  
 30 

 Section 35. Force Majeure. Notwithstanding anything to the contrary contained
herein, the Rights Agent shall not be liable for any delays or failures in performance resulting from acts beyond its reasonable control including, without limitation, acts of God, terrorist acts, shortage of supply, breakdowns or malfunctions,
interruptions or malfunction of computer facilities, or loss of data due to power failures or mechanical difficulties with information storage or retrieval systems, labor difficulties, war, or civil unrest. 

Section 36. Patriot Act. The Company acknowledges that the Rights Agent is subject to the customer identification program
(“Customer Identification Program”) requirements under the USA PATRIOT Act and its implementing regulations, and that the Rights Agent must obtain, verify and record information that allows the Rights Agent to identify the Company.
Accordingly, prior to accepting an appointment hereunder, the Rights Agent has received information from the Company that will help the Rights Agent to identify the Company, including without limitation the Company’s physical address, tax
identification number, organizational documents, certificate of good standing, license to do business, or any other information that the Company deems necessary and that pending verification of received information the Rights Agent may request
further such information. The Company agrees to provide all reasonably requested information necessary for the Rights Agent to verify the Company’s identity in accordance with the Customer Identification Program requirements. 

[SIGNATURE PAGE TO FOLLOW] 

  
 31 

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

					
	SORRENTO THERAPEUTICS, INC.
		
	By	 	  

		 	Name:	 	Henry Ji
		 	Title:	 	President and Chief Executive Officer
	
	PHILADELPHIA STOCK TRANSFER, Inc., as Rights Agent
		
	By	 	  

		 	Name:	 	
		 	Title:	 	

  
 32 

 Exhibit A 

CERTIFICATION OF DESIGNATION, PREFERENCES AND RIGHTS OF SERIES A JUNIOR 

PARTICIPATING PREFERRED STOCK 
 of

 SORRENTO THERAPEUTICS, INC. 

Pursuant to Section 151 of the 

General Corporation Law of the State of Delaware 

I, Richard Vincent, Chief Financial Officer of Sorrento Therapeutics, Inc., a corporation organized and existing under the General Corporation
Law of the State of Delaware, in accordance with the provisions of Section 103 thereof, DO HEREBY CERTIFY: 
 That pursuant to the
authority conferred upon the Board of Directors by the Restated Certificate of Incorporation of the said Corporation, the said Board of Directors on November 7, 2013 adopted the following resolution creating a series of 1,000,000 shares of
Preferred Stock designated as Series A Junior Participating Preferred Stock: 
 RESOLVED, that pursuant to the authority vested in the Board
of Directors of this Corporation in accordance with the provisions of its Restated Certificate of Incorporation, a series of Preferred Stock of the Corporation be and it hereby is created, and that the designation and amount thereof and the voting
powers, preferences and relative, participating, optional and other special rights of the shares of such series, and the qualifications, limitations or restrictions thereof are as follows: 

Section 1. Designation and Amount. The shares of such series shall be designated as “Series A Junior Participating Preferred
Stock” and the number of shares constituting such series shall be 1,000,000. 
 Section 2. Dividends and Distributions.

 (A) Subject to the prior and superior rights of the holders of any shares of any series of Preferred Stock ranking prior and superior to
the shares of Series A Junior Participating Preferred Stock with respect to dividends, the holders of shares of Series A Junior Participating Preferred Stock shall be entitled to receive, when, as and if declared by the Board of Directors out of
funds legally available for the purpose, quarterly dividends payable in cash on the 15th day of March, June, September and December in each year (each such date being referred to herein as a “Quarterly Dividend Payment Date”), commencing
on the first Quarterly Dividend Payment Date after the first issuance of a share or fraction of a share of Series A Junior Participating Preferred Stock, in an amount per share (rounded to the nearest cent) equal to the greater of (a) $1.00 or
(b) subject to the provision for adjustment hereinafter set forth, 1000 times the aggregate per share amount of all cash dividends, and 1000 times the aggregate per share amount (payable in kind) of all non-cash dividends or other distributions
other than a dividend payable in shares of Common Stock or a subdivision of the outstanding shares of Common Stock (by reclassification or otherwise), declared on the Common Stock, par value $0.0001 per share, of the Corporation (the “Common
Stock”) since the immediately preceding Quarterly Dividend Payment Date, or, with respect to the first Quarterly Dividend Payment Date, since the first issuance of any share or fraction of a share of Series A Junior Participating Preferred
Stock. In the event the Corporation shall at any time after November 7, 2013 (the “Rights Declaration Date”) (i) declare any dividend on Common Stock payable in shares of Common Stock, (ii) subdivide the outstanding Common
Stock, or (iii) combine the outstanding Common Stock into a smaller number of shares, then in each such case the amount to which holders of shares of Series A Junior Participating Preferred Stock were entitled immediately prior to such event
under clause (b) of the preceding sentence shall be adjusted by multiplying such amount by a fraction the numerator of which is the number of shares of Common Stock outstanding immediately after such event and the denominator of which is the
number of shares of Common Stock that were outstanding immediately prior to such event. 
 (B) The Corporation shall declare a dividend or
distribution on the Series A Junior Participating Preferred Stock as provided in Paragraph (A) above immediately after it declares a dividend or distribution on the Common Stock (other than a dividend payable in shares of Common Stock);
provided that, in the event no dividend or distribution shall have been declared on the Common Stock during the period between any Quarterly Dividend Payment Date and the next subsequent Quarterly Dividend Payment Date, a dividend of $1.00 per share
on the Series A Junior Participating Preferred Stock shall nevertheless be payable on such subsequent Quarterly Dividend Payment Date. 

  
 33 

 (C) Dividends shall begin to accrue and be cumulative on outstanding shares of Series A Junior
Participating Preferred Stock from the Quarterly Dividend Payment Date next preceding the date of issue of such shares of Series A Junior Participating Preferred Stock, unless the date of issue of such shares is prior to the record date for the
first Quarterly Dividend Payment Date, in which case dividends on such shares shall begin to accrue from the date of issue of such shares, or unless the date of issue is a Quarterly Dividend Payment Date or is a date after the record date for the
determination of holders of shares of Series A Junior Participating Preferred Stock entitled to receive a quarterly dividend and before such Quarterly Dividend Payment Date, in either of which events such dividends shall begin to accrue and be
cumulative from such Quarterly Dividend Payment Date. Accrued but unpaid dividends shall not bear interest. Dividends paid on the shares of Series A Junior Participating Preferred Stock in an amount less than the total amount of such dividends at
the time accrued and payable on such shares shall be allocated pro rata on a share-by-share basis among all such shares at the time outstanding. The Board of Directors may fix a record date for the determination of holders of shares of Series A
Junior Participating Preferred Stock entitled to receive payment of a dividend or distribution declared thereon, which record date shall be no more than 30 days prior to the date fixed for the payment thereof. 

Section 3. Voting Rights. The holders of shares of Series A Junior Participating Preferred Stock shall have the following voting
rights: 
 (A) Subject to the provision for adjustment hereinafter set forth, each share of Series A Junior Participating Preferred Stock
shall entitle the holder thereof to 1000 votes on all matters submitted to a vote of the stockholders of the Corporation. In the event the Corporation shall at any time after the Rights Declaration Date (i) declare any dividend on Common Stock
payable in shares of Common Stock, (ii) subdivide the outstanding Common Stock, or (iii) combine the outstanding Common Stock into a smaller number of shares, then in each such case the number of votes per share to which holders of shares
of Series A Junior Participating Preferred Stock were entitled immediately prior to such event shall be adjusted by multiplying such number by a fraction the numerator of which is the number of shares of Common Stock outstanding immediately after
such event and the denominator of which is the number of shares of Common Stock that were outstanding immediately prior to such event. 

(B) Except as otherwise provided herein or by law, the holders of shares of Series A Junior Participating Preferred Stock and the holders of
shares of Common Stock shall vote together as one class on all matters submitted to a vote of stockholders of the Corporation. 

(C) (i) If at any time dividends on any Series A Junior Participating Preferred Stock shall be in arrears in an amount equal to six
(6) quarterly dividends thereon, the occurrence of such contingency shall mark the beginning of a period (herein called a “default period”) which shall extend until such time when all accrued and unpaid dividends for all previous
quarterly dividend periods and for the current quarterly dividend period on all shares of Series A Junior Participating Preferred Stock then outstanding shall have been declared and paid or set apart for payment. During each default period, all
holders of Preferred Stock (including holders of the Series A Junior Participating Preferred Stock) with dividends in arrears in an amount equal to six (6) quarterly dividends thereon, voting as a class, irrespective of series, shall have the
right to elect two (2) directors. 
 (ii) During any default period, such voting right of the holders of Series A Junior Participating
Preferred Stock may be exercised initially at a special meeting called pursuant to subparagraph (iii) of this Section 3(C) or at any annual meeting of stockholders, and thereafter at annual meetings of stockholders, provided that neither
such voting right nor the right of the holders of any other series of Preferred Stock, if any, to increase, in certain cases, the authorized number of directors shall be exercised unless the holders of at least one-third in number of shares of
Preferred Stock outstanding shall be present in person or by proxy. The absence of a quorum of the holders of Common Stock shall not affect the exercise by the holders of Preferred Stock of such voting right. At any meeting at which the holders of
Preferred Stock shall exercise such voting right initially during an existing default period, they shall have the right, voting as a class, to elect directors to fill such vacancies, if any, in the Board of Directors as may then exist up to two
(2) directors or, if such right is exercised at an annual meeting, to elect two (2) directors. If the number which may be so elected at any special meeting does not amount to the required number, the holders of the Preferred Stock shall
have the right to make such increase in the number of directors as shall be necessary to permit the election by them of the required number. After the holders of the Preferred Stock shall have exercised their right to elect directors in any default
period and during the continuance of such period, the number of directors shall not be increased or decreased except by vote of the holders of Preferred Stock as herein provided or pursuant to the rights of any equity securities ranking senior to or
pari passu with the Series A Junior Participating Preferred Stock. 
 (iii) Unless the holders of Preferred Stock shall, during an
existing default period, have previously exercised their right to elect directors, the Board of Directors may order, or any stockholder or stockholders owning in the aggregate not less than ten percent (10%) of the total number of shares of
Preferred Stock outstanding, irrespective of series, may request, the calling of a 

  
 34 

 
special meeting of the holders of Preferred Stock, which meeting shall thereupon be called by the Chairman of the Board, the President, an Executive Vice-President, a Vice-President or the
Secretary of the Corporation. Notice of such meeting and of any annual meeting at which holders of Preferred Stock are entitled to vote pursuant to this Paragraph (C)(iii) shall be given to each holder of record of Preferred Stock by mailing a copy
of such notice to him at his last address as the same appears on the books of the Corporation. Such meeting shall be called for a time not earlier than 20 days and not later than 60 days after such order or request or in default of the calling of
such meeting within 60 days after such order or request, such meeting may be called on similar notice by any stockholder or stockholders owning in the aggregate not less than ten percent (10%) of the total number of shares of Preferred Stock
outstanding. Notwithstanding the provisions of this Paragraph (C)(iii), no such special meeting shall be called during the period within 60 days immediately preceding the date fixed for the next annual meeting of the stockholders. 

(iv) In any default period, the holders of Common Stock, and other classes of stock of the Corporation if applicable, shall continue to be
entitled to elect the whole number of directors until the holders of Preferred Stock shall have exercised their right to elect two (2) directors voting as a class, after the exercise of which right (x) the directors so elected by the
holders of Preferred Stock shall continue in office until their successors shall have been elected by such holders or until the expiration of the default period, and (y) any vacancy in the Board of Directors may (except as provided in Paragraph
(C)(ii) of this Section 3) be filled by vote of a majority of the remaining directors theretofore elected by the holders of the class of stock which elected the director whose office shall have become vacant. References in this Paragraph
(C) to directors elected by the holders of a particular class of stock shall include directors elected by such directors to fill vacancies as provided in clause (y) of the foregoing sentence. 

(v) Immediately upon the expiration of a default period, (x) the right of the holders of Preferred Stock as a class to elect directors
shall cease, (y) the term of any directors elected by the holders of Preferred Stock as a class shall terminate, and (z) the number of directors shall be such number as may be provided for in the restated certificate of incorporation of
the Corporation, as amended, or the Corporation’s amended and restated by-laws irrespective of any increase made pursuant to the provisions of Paragraph (C)(ii) of this Section 3 (such number being subject, however, to change thereafter in
any manner provided by law or in the restated certificate of incorporation of the Corporation, as amended, or the Corporation’s amended and restated by-laws). Any vacancies in the Board of Directors effected by the provisions of clauses
(y) and (z) in the preceding sentence may be filled by a majority of the remaining directors. 
 (D) Except as set forth herein,
holders of Series A Junior Participating Preferred Stock shall have no special voting rights and their consent shall not be required (except to the extent they are entitled to vote with holders of Common Stock as set forth herein) for taking any
corporate action. 
 Section 4. Certain Restrictions. 

(A) Whenever quarterly dividends or other dividends or distributions payable on the Series A Junior Participating Preferred Stock as provided
in Section 2 are in arrears, thereafter and until all accrued and unpaid dividends and distributions, whether or not declared, on shares of Series A Junior Participating Preferred Stock outstanding shall have been paid in full, the Corporation
shall not: 
 (i) declare or pay dividends on, make any other distributions on, or redeem or purchase or otherwise acquire for consideration
any shares of stock ranking junior (either as to dividends or upon liquidation, dissolution or winding up) to the Series A Junior Participating Preferred Stock; 

(ii) declare or pay dividends on or make any other distributions on any shares of stock ranking on a parity (either as to dividends or upon
liquidation, dissolution or winding up) with the Series A Junior Participating Preferred Stock, except dividends paid ratably on the Series A Junior Participating Preferred Stock and all such parity stock on which dividends are payable or in arrears
in proportion to the total amounts to which the holders of all such shares are then entitled; 
 (iii) redeem or purchase or otherwise
acquire for consideration shares of any stock ranking on a parity (either as to dividends or upon liquidation, dissolution or winding up) with the Series A Junior Participating Preferred Stock, provided that the Corporation may at any time redeem,
purchase or otherwise acquire shares of any such parity stock in exchange for shares of any stock of the Corporation ranking junior (either as to dividends or upon dissolution, liquidation or winding up) to the Series A Junior Participating
Preferred Stock; or 
 (iv) purchase or otherwise acquire for consideration any shares of Series A Junior Participating Preferred Stock or
any shares of stock ranking on a parity with the Series A Junior Participating Preferred Stock, except in accordance with a purchase offer made in writing or by publication (as determined by the Board of Directors) to all holders of such shares upon
such terms as the Board of Directors, after consideration of the respective annual dividend rates and other relative rights and preferences of the 

  
 35 

 
respective series and classes, shall determine in good faith will result in fair and equitable treatment among the respective series or classes. 

(B) The Corporation shall not permit any subsidiary of the Corporation to purchase or otherwise acquire for consideration any shares of stock
of the Corporation unless the Corporation could, under Paragraph (A) of this Section 4, purchase or otherwise acquire such shares at such time and in such manner. 

Section 5. Reacquired Shares. Any shares of Series A Junior Participating Preferred Stock purchased or otherwise acquired by the
Corporation in any manner whatsoever shall be retired and cancelled promptly after the acquisition thereof. All such shares shall upon their cancellation become authorized but unissued shares of Preferred Stock and may be reissued as part of a new
series of Preferred Stock to be created by resolution or resolutions of the Board of Directors, subject to the conditions and restrictions on issuance set forth herein. 

Section 6. Liquidation, Dissolution or Winding Up. (A) Upon any liquidation (voluntary or otherwise), dissolution or winding
up of the Corporation, no distribution shall be made to the holders of shares of stock ranking junior (either as to dividends or upon liquidation, dissolution or winding up) to the Series A Junior Participating Preferred Stock unless, prior thereto,
the holders of shares of Series A Junior Participating Preferred Stock shall have received an amount equal to $1,000 per share of Participating Preferred Stock, Series A, plus an amount equal to accrued and unpaid dividends and distributions
thereon, whether or not declared, to the date of such payment (the “Series A Liquidation Preference”). Following the payment of the full amount of the Series A Liquidation Preference, no additional distributions shall be made to the
holders of shares of Series A Junior Participating Preferred Stock unless, prior thereto, the holders of shares of Common Stock shall have received an amount per share (the “Common Adjustment”) equal to the quotient obtained by dividing
(i) the Series A Liquidation Preference by (ii) 1000 (as appropriately adjusted as set forth in subparagraph (C) below to reflect such events as stock splits, stock dividends and recapitalizations with respect to the Common Stock)
(such number in clause (ii), the “Adjustment Number”). Following the payment of the full amount of the Series A Liquidation Preference and the Common Adjustment in respect of all outstanding shares of Series A Junior Participating
Preferred Stock and Common Stock, respectively, holders of Series A Junior Participating Preferred Stock and holders of shares of Common Stock shall receive their ratable and proportionate share of the remaining assets to be distributed in the ratio
of the Adjustment Number to 1 with respect to such Preferred Stock and Common Stock, on a per share basis, respectively. 
 (B) In the
event, however, that there are not sufficient assets available to permit payment in full of the Series A Liquidation Preference and the liquidation preferences of all other series of preferred stock, if any, which rank on a parity with the Series A
Junior Participating Preferred Stock, then such remaining assets shall be distributed ratably to the holders of such parity shares in proportion to their respective liquidation preferences. In the event, however, that there are not sufficient assets
available to permit payment in full of the Common Adjustment, then such remaining assets shall be distributed ratably to the holders of Common Stock. 

(C) In the event the Corporation shall at any time after the Rights Declaration Date (i) declare any dividend on Common Stock payable in
shares of Common Stock, (ii) subdivide the outstanding Common Stock, or (iii) combine the outstanding Common Stock into a smaller number of shares, then in each such case the Adjustment Number in effect immediately prior to such event
shall be adjusted by multiplying such Adjustment Number by a fraction the numerator of which is the number of shares of Common Stock outstanding immediately after such event and the denominator of which is the number of shares of Common Stock that
were outstanding immediately prior to such event. 
 Section 7. Consolidation, Merger, etc. In case the Corporation shall enter
into any consolidation, merger, combination or other transaction in which the shares of Common Stock are exchanged for or changed into other stock or securities, cash and/or any other property, then in any such case the shares of Series A Junior
Participating Preferred Stock shall at the same time be similarly exchanged or changed in an amount per share (subject to the provision for adjustment hereinafter set forth) equal to 1,000 times the aggregate amount of stock, securities, cash and/or
any other property (payable in kind), as the case may be, into which or for which each share of Common Stock is changed or exchanged. In the event the Corporation shall at any time after the Rights Declaration Date (i) declare any dividend on
Common Stock payable in shares of Common Stock, (ii) subdivide the outstanding Common Stock, or (iii) combine the outstanding Common Stock into a smaller number of shares, then in each such case the amount set forth in the preceding
sentence with respect to the exchange or change of shares of Series A Junior Participating Preferred Stock shall be adjusted by multiplying such amount by a fraction the numerator of which is the number of

  
 36 

 
shares of Common Stock outstanding immediately after such event and the denominator of which is the number of shares of Common Stock that were outstanding immediately prior to such event. 

Section 8. No Redemption. The shares of Series A Junior Participating Preferred Stock shall not be redeemable. 

Section 9. Ranking. The Series A Junior Participating Preferred Stock shall rank junior to all other series of the
Corporation’s Preferred Stock as to the payment of dividends and the distribution of assets, unless the terms of any such series shall provide otherwise. 

Section 10. Amendment. At any time when any shares of Series A Junior Participating Preferred Stock are outstanding, neither the
Restated Certificate of Incorporation, as amended, of the Corporation nor this Certificate of Designation shall be amended in any manner which would materially alter or change the powers, preferences or special rights of the Series A Junior
Participating Preferred Stock so as to affect them adversely without the affirmative vote of the holders of two-thirds or more of the outstanding shares of Series A Junior Participating Preferred Stock, voting separately as a class. 

Section 11. Fractional Shares. Series A Junior Participating Preferred Stock may be issued in fractions of a share which shall
entitle the holder, in proportion to such holder’s fractional shares, to exercise voting rights, receive dividends, participate in distributions and to have the benefit of all other rights of holders of Series A Junior Participating Preferred
Stock. 
 IN WITNESS WHEREOF, Sorrento Therapeutics, Inc. has caused this Certificate of Designation to be executed in its corporate name
this 7th day of November, 2013. 
  

			
	SORRENTO THERAPEUTICS, INC.
		
	By:	 	  

	Name:	 	
	Title:	 	

  
 37 

 Exhibit B 

[Form of Rights Certificate] 
  

			
	Certificate No. R	  	             Rights

 NOT EXERCISABLE AFTER NOVEMBER 7, 2016 OR SUCH EARLIER DATE AS THE RIGHTS ARE REDEEMED, EXCHANGED OR TERMINATED. THE
RIGHTS ARE SUBJECT TO REDEMPTION, AT THE OPTION OF THE COMPANY, AT $0.001 PER RIGHT, AND TO EXCHANGE ON THE TERMS SET FORTH IN THE RIGHTS AGREEMENT. UNDER CERTAIN CIRCUMSTANCES, RIGHTS BENEFICIALLY OWNED BY AN ACQUIRING PERSON (AS SUCH TERM IS
DEFINED IN THE RIGHTS AGREEMENT) AND ANY SUBSEQUENT HOLDER OF SUCH RIGHTS MAY BECOME NULL AND VOID. [THE RIGHTS REPRESENTED BY THIS RIGHTS CERTIFICATE ARE OR WERE BENEFICIALLY OWNED BY A PERSON WHO WAS OR BECAME AN ACQUIRING PERSON OR AN AFFILIATE
OR ASSOCIATE OF AN ACQUIRING PERSON (AS SUCH TERMS ARE DEFINED IN THE RIGHTS AGREEMENT). ACCORDINGLY, THIS RIGHTS CERTIFICATE AND THE RIGHTS REPRESENTED HEREBY MAY BECOME NULL AND VOID IN THE CIRCUMSTANCES SPECIFIED IN SECTION 7(e) OF SUCH
AGREEMENT.] 1 
  

	
	Rights Certificate
	
	SORRENTO THERAPEUTICS, INC.

  

	1	The portion of the legend in brackets shall be inserted only if applicable and shall replace the preceding sentence. 

  
 38 

 This certifies that
                    , or registered assigns, is the registered owner of the number of Rights set forth above, each of which entitles the owner
thereof, subject to the terms, provisions and conditions of the Amended and Restated Rights Agreement, dated as of December 22, 2014 (the “Rights Agreement”), between Sorrento Therapeutics, Inc., a Delaware corporation (the
“Company”), and Philadelphia Stock Transfer, Inc. (the “Rights Agent”), to purchase from the Company at any time prior to 5:00 P.M. (New York City time) on November 7, 2016 (unless such date is extended prior thereto by
the Board of Directors), at the office or offices of the Rights Agent designated for such purpose, or its successors as Rights Agent, one one-thousandth of a fully paid, non assessable share of Series A Junior Participating Preferred Stock (the
“Preferred Stock”) of the Company, at a purchase price of $150 per one one-thousandth of a share (the “Purchase Price”), upon presentation and surrender of this Rights Certificate with the Form of Election to Purchase and related
Certificate duly executed. The number of Rights evidenced by this Rights Certificate (and the number of shares which may be purchased upon exercise thereof) set forth above, and the Purchase Price per share set forth above, are the number and
Purchase Price as of November 7, 2013, based on the Preferred Stock as constituted at such date. The Company reserves the right to require prior to the occurrence of a Triggering Event (as such term is defined in the Rights Agreement) that a
number of Rights be exercised so that only whole shares of Preferred Stock will be issued. Capitalized terms used in this Rights Certificate without definition shall have the meanings ascribed to them in the Rights Agreement. 

Upon the occurrence of a Section 11(a)(ii) Event (as such term is defined in the Rights Agreement), if the Rights evidenced by this
Rights Certificate are beneficially owned by (i) an Acquiring Person or an Affiliate or Associate of any such Acquiring Person (as such terms are defined in the Rights Agreement), (ii) a transferee of any such Acquiring Person, Associate
or Affiliate, or (iii) under certain circumstances specified in the Rights Agreement, a transferee of a person who, after such transfer, became an Acquiring Person, or an Affiliate or Associate of an Acquiring Person, such Rights shall become
null and void and no holder hereof shall have any right with respect to such Rights from and after the occurrence of such Section 11(a)(ii) Event. 

As provided in the Rights Agreement, the Purchase Price and the number and kind of shares of Preferred Stock or other securities, which may be
purchased upon the exercise of the Rights evidenced by this Rights Certificate are subject to modification and adjustment upon the happening of certain events, including Triggering Events. 

This Rights Certificate is subject to all of the terms, provisions and conditions of the Rights Agreement, which terms, provisions and
conditions are hereby incorporated herein by reference and made a part hereof and to which Rights Agreement reference is hereby made for a full description of the rights, limitations of rights, obligations, duties and immunities hereunder of the
Rights Agent, the Company and the holders of the Rights Certificates, which limitations of rights include the temporary suspension of the exercisability of such Rights under the specific circumstances set forth in the Rights Agreement. Copies of the
Rights Agreement are on file at the above mentioned office of the Rights Agent and are also available upon written request to the Rights Agent. 

This Rights Certificate, with or without other Rights Certificates, upon surrender at the office or offices of the Rights Agent designated for
such purpose, may be exchanged for another Rights Certificate or Rights Certificates of like tenor and date evidencing Rights entitling the holder to purchase a like aggregate number of one one-thousandths of a share of Preferred Stock as the Rights
evidenced by the Rights Certificate or Rights Certificates surrendered shall have entitled such holder to purchase. If this Rights Certificate shall be exercised in part, the holder shall be entitled to receive upon surrender hereof another Rights
Certificate or Rights Certificates for the number of whole Rights not exercised. 
 Subject to the provisions of the Rights Agreement, the
Rights evidenced by this Rights Certificate may be redeemed by the Company at its option at a redemption price of $0.001 per Right at any time prior to the earlier of the close of business on (i) the tenth Business Day following the Stock
Acquisition Date (as such time period may be extended pursuant to the Rights Agreement), and (ii) the Final Expiration Date. In addition, under certain circumstances following the Stock Acquisition Date, the Rights may be exchanged, in whole or
in part, for shares of the Common Stock, or shares of preferred stock of the Company having essentially the same value or economic rights as such shares. Immediately upon the action of the Board of Directors of the Company authorizing any such
exchange, and without any further action or any notice, the Rights (other than Rights which are not subject to such exchange) will terminate and the Rights will only enable holders to receive the shares issuable upon such exchange. 

No fractional shares of Preferred Stock will be issued upon the exercise of any Right or Rights evidenced hereby (other than fractions which
are integral multiples of one one-thousandth of a share of Preferred Stock, which may, at the election of the Company, be evidenced by depositary receipts), but in lieu thereof a cash payment will be made, as provided in the Rights

  
 39 

 
Agreement. The Company, at its election, may require that a number of Rights be exercised so that only whole shares of Preferred Stock would be issued. 

No holder of this Rights Certificate shall be entitled to vote or receive dividends or be deemed for any purpose the holder of shares of
Preferred Stock or of any other securities of the Company which may at any time be issuable on the exercise hereof, nor shall anything contained in the Rights Agreement or herein be construed to confer upon the holder hereof, as such, any of the
rights of a stockholder of the Company or any right to vote for the election of directors or upon any matter submitted to stockholders at any meeting thereof, or to give consent to or withhold consent from any corporate action, or, to receive notice
of meetings or other actions affecting stockholders (except as provided in the Rights Agreement), or to receive dividends or subscription rights, or otherwise, until the Right or Rights evidenced by this Rights Certificate shall have been exercised
as provided in the Rights Agreement. 
 This Rights Certificate shall not be valid or obligatory for any purpose until it shall have been
countersigned by the Rights Agent. 
 WITNESS the signature of a proper officer of the Company. 

Dated as of             ,          

 

			
	SORRENTO THERAPEUTICS, INC.
		
	By	 	  

		
		 	Title:

  
 40 

 [Form of Reverse Side of Rights Certificate] 

FORM OF ASSIGNMENT 
 (To be
executed by the registered holder if such 
 holder desires to transfer the Rights Certificate.) 

 

			
	 FOR VALUE RECEIVED
	  	  

			
		
	hereby sells, assigns and transfers unto	 	  

	
	  

	(Please print name and address of transferee)
	
	  

 this Rights Certificate, together with all right, title and interest therein, and does hereby irrevocably constitute and
appoint              Attorney, to transfer the within Rights Certificate on the books of the within named Company, with full power of substitution. 

Dated:             ,          

 

	
	  

	Signature

 Signature Guaranteed: 
  

 
 Signatures must be guaranteed by a participant in the
Medallion Signature Guarantee Program at a guarantee level acceptable to the Company’s Rights Agent. 

  
 41 

 Certificate 

The undersigned hereby certifies by checking the appropriate boxes that: 

(1) this Rights Certificate [    ] is [    ] is not being sold, assigned and
transferred by or on behalf of a Person who is or was an Acquiring Person or an Affiliate or Associate of any such Acquiring Person (as such terms are defined pursuant to the Rights Agreement); 

(2) after due inquiry and to the best knowledge of the undersigned, it [    ] did
[    ] did not acquire the Rights evidenced by this Rights Certificate from any Person who is, was or subsequently became an Acquiring Person or an Affiliate or Associate of an Acquiring Person. 

Dated:             ,          

 

	
	  

	Signature

 Signature Guaranteed: 

Signatures must be guaranteed by a participant in the Medallion Signature Guarantee Program at a guarantee level acceptable to the Company’s Rights
Agent. 

  
 42 

 NOTICE 

The signature to the foregoing Assignment and Certificate must correspond to the name as written upon the face of this Rights Certificate in
every particular, without alteration or enlargement or any change whatsoever. 

  
 43 

 FORM OF ELECTION TO PURCHASE 

(To be executed if holder desires to exercise Rights 

represented by the Rights Certificate.) 
 To:
SORRENTO THERAPEUTICS, INC.: 
 The undersigned hereby irrevocably elects to exercise
             Rights represented by this Rights Certificate to purchase the shares of Preferred Stock issuable upon the exercise of the Rights (or such other securities of the Company or of
any other person which may be issuable upon the exercise of the Rights) and requests that certificates for such shares be issued in the name of and delivered to: 

Please insert social security 
 or other identifying number 

 
  

(Please print name and address) 
  

 
 If such number of Rights shall not
be all the Rights evidenced by this Rights Certificate, a new Rights Certificate for the balance of such Rights shall be registered in the name of and delivered to: 

Please insert social security 
 or other identifying number 

 
  

(Please print name and address) 
  

 
  

 
 Dated:
            ,          
  

	
	  

	Signature

 Signature Guaranteed: 

Signatures must be guaranteed by a participant in the Medallion Signature Guarantee Program at a guarantee level acceptable to the Company’s Rights
Agent. 

  
 44 

 Certificate 

The undersigned hereby certifies by checking the appropriate boxes that: 

(1) the Rights evidenced by this Rights Certificate [    ] are [    ] are not being
exercised by or on behalf of a Person who is or was an Acquiring Person or an Affiliate or Associate of any such Acquiring Person (as such terms are defined pursuant to the Rights Agreement); 

(2) after due inquiry and to the best knowledge of the undersigned, it [    ] did
[    ] did not acquire the Rights evidenced by this Rights Certificate from any Person who is, was or became an Acquiring Person or an Affiliate or Associate of an Acquiring Person. 

Dated:             ,          

 

	
	  

	Signature

 Signature Guaranteed: 

Signatures must be guaranteed by a participant in the Medallion Signature Guarantee Program at a guarantee level acceptable to the Company’s Rights
Agent. 

  
 45 

 NOTICE 

The signature to the foregoing Election to Purchase and Certificate must correspond to the name as written upon the face of this Rights
Certificate in every particular, without alteration or enlargement or any change whatsoever. 

  
 46 

 Exhibit C 

FORM OF 
 SUMMARY OF RIGHTS TO
PURCHASE 
 PREFERRED STOCK 

On November 7, 2013, the Board of Directors (the “Board”) of Sorrento Therapeutics, Inc., a Delaware corporation (the
“Company”), authorized and declared a dividend distribution of one right (a “Right”) for each outstanding share of the common stock of the Company, par value $0.0001 per share (the “Common Stock”), to stockholders of
record at the close of business on November 18, 2013 (the “Record Date”). Each Right entitles the registered holder to purchase from the Company a unit consisting of one one-thousandth of a share (a “Unit”) of a newly
authorized series of Series A Junior Participating Preferred Stock, par value $.0001 per share (the “Preferred Stock”), at a purchase price of $150 per Unit, subject to adjustment (the “Purchase Price”). The complete terms of the
Rights are set forth in a Amended and Restated Rights Agreement (the “Rights Agreement”), dated as of December 22, 2014, between the Company and Philadelphia Stock Transfer, Inc., as Rights Agent. 

Rights Certificates; Exercise Period. 

Initially, the Rights will be attached to all shares of Common Stock then outstanding, and no separate rights certificates (“Rights
Certificates”) will be distributed. Subject to certain exceptions specified in the Rights Agreement, the Rights will separate from the Common Stock and a distribution date (a “Distribution Date”) will occur upon the earlier of
(i) 10 business days following a public announcement that a person or group of affiliated or associated persons (an “Acquiring Person”) has acquired beneficial ownership of fifteen percent (15%) or more of the outstanding shares
of Common Stock (the “Stock Acquisition Date”), other than as a result of repurchases of stock by the Company or certain inadvertent actions by certain stockholders or (ii) 10 business days (or such later date as the Board shall
determine) following the commencement of a tender offer or exchange offer that would result in a person or group becoming an Acquiring Person. For purposes of the Rights Agreement, beneficial ownership is defined to include ownership of derivative
securities. 
 Until a Distribution Date, (i) the Rights will be evidenced by the certificates for the Common Stock (or, in the case of
shares reflected on the direct registration system, by the notations in the book-entry account system) and will only be transferable with such Common Stock, (ii) new Common Stock certificates issued after the Record Date will contain a legend
incorporating the Rights Agreement by reference and (iii) the surrender for transfer of any certificates for Common Stock outstanding will also constitute the transfer of the Rights associated with the Common Stock represented by such
certificates. Pursuant to the Rights Agreement, the Company reserves the right to require prior to the occurrence of a Triggering Event (as defined below) that, upon any exercise of Rights, a number of Rights be exercised so that only whole shares
of Preferred Stock will be issued. 
 The Rights are not exercisable until a Distribution Date and will expire at 5:00 P.M., New York City
time on November 7, 2016, unless such date is extended or the Rights are earlier redeemed, exchanged or terminated. 
 As soon as
practicable after a Distribution Date, Rights Certificates will be mailed to holders of record of the Common Stock as of the close of business on a Distribution Date and, thereafter, the separate Rights Certificates alone will represent the Rights.
Except as otherwise determined by the Board, only shares of Common Stock issued prior to a Distribution Date will be issued with Rights. 

Flip-in Trigger. 
 In the
event that a person or group of affiliated or associated persons becomes an Acquiring Person, except pursuant to an offer for all outstanding shares of Common Stock which the independent directors determine to be fair and not inadequate and to
otherwise be in the best interests of the Company and its stockholders after receiving advice from one or more investment banking firms, each holder of a Right will thereafter have the right to receive, upon exercise, Common Stock (or, in certain
circumstances, cash, property or other securities of the Company) having a value equal to two times the exercise price of the Right. Notwithstanding the foregoing, following the occurrence of the event set forth in this paragraph, all Rights that
are, or (under certain circumstances specified in the Rights Agreement) were, beneficially owned by any Acquiring Person will be null and void. However, Rights are not exercisable following the occurrence of the event set forth above until such time
as the Rights 

  
 47 

 
are no longer redeemable by the Company as set forth below. Any person who, together with its affiliates and associates, beneficially owns 15% or more of the outstanding shares of Common Stock as
of the time of the first public announcement of the Rights Agreement (an “Exempt Person”) shall not be deemed an Acquiring Person, but only for so long as such person, together with its affiliates and associates, does not become the
beneficial owner of any additional shares of Common Stock while such person is an Exempt Person. A person will cease to be an Exempt Person if such person, together with such person’s affiliates and associates, becomes the beneficial owner of
less than 15% of the outstanding shares of Common Stock. 
 Flip-over Trigger. 

In the event that, at any time following the Stock Acquisition Date, (i) the Company engages in a merger or other business combination
transaction in which the Company is not the surviving corporation, (ii) the Company engages in a merger or other business combination transaction in which the Company is the surviving corporation and the Common Stock of the Company is changed
or exchanged, or (iii) 50% or more of the Company’s assets, cash flow or earning power is sold or transferred, each holder of a Right (except Rights which have previously been voided as set forth above) shall thereafter have the right to
receive, upon exercise, common stock of the acquiring company having a value equal to two times the exercise price of the Right. The events set forth in this paragraph and in the second preceding paragraph are referred to as the “Triggering
Events.” 
 Exchange Feature. 

At any time after a person becomes an Acquiring Person and prior to the acquisition by such person or group of fifty percent (50%) or more
of the outstanding Common Stock, the Board may exchange the Rights (other than Rights owned by such person or group which have become null and void), in whole or in part, at an exchange ratio of one share of Common Stock, or one one-thousandth of a share of Preferred Stock (or of a share of a class or series of the Company’s preferred stock having equivalent rights, preferences and privileges), per Right (subject to adjustment). 

Equitable Adjustments. 

The Purchase Price payable, and the number of Units of Preferred Stock or other securities or property issuable, upon exercise of the Rights
are subject to adjustment from time to time to prevent dilution (i) in the event of a dividend on the Preferred Stock payable in shares of Preferred Stock, a subdivision or split of outstanding shares of Preferred Stock, a combination or
consolidation of Preferred Stock into a smaller number of shares through a reverse stock split or otherwise, or reclassification of the Preferred Stock, (ii) if holders of the Preferred Stock are granted certain rights, options or warrants to
subscribe for Preferred Stock or convertible securities at less than the current market price of the Preferred Stock, or (iii) upon the distribution to holders of the Preferred Stock of cash (excluding regular quarterly cash dividends), assets,
evidences of indebtedness or of subscription rights or warrants (other than those referred to above). 
 With certain exceptions, no
adjustment in the Purchase Price will be required until cumulative adjustments amount to at least 1% of the Purchase Price. No fractional Units will be issued and, in lieu thereof, an adjustment in cash will be made based on the market price of the
Preferred Stock on the last trading date prior to the date of exercise. 
 Redemption Rights. 

At any time until ten business days following the Stock Acquisition Date, the Company may redeem the Rights in whole, but not in part, at a
price of $0.001 per Right (payable in cash, Common Stock or other consideration deemed appropriate by the Board). Immediately upon the action of the Board ordering redemption of the Rights, the Rights will terminate and the only right of the holders
of Rights will be to receive the $0.001 redemption price. 
 Miscellaneous. 

Until a Right is exercised, the holder thereof, as such, will have no separate rights as a stockholder of the Company, including, without
limitation, the right to vote or to receive dividends in respect of Rights. While the distribution of the Rights will not be taxable to stockholders or to the Company, stockholders may, depending upon the circumstances, recognize taxable income in
the event that the Rights become exercisable for Common Stock (or other consideration) of the Company or for common stock of the acquiring company or in the event of the redemption of the Rights as set forth above. 

Amendment. 

  
 48 

 Any of the provisions of the Rights Agreement may be amended by the Board prior to a Distribution
Date. After a Distribution Date, the provisions of the Rights Agreement may be amended by the Board in order to cure any ambiguity, to make changes which do not adversely affect the interests of holders of Rights, or to shorten or lengthen any time
period under the Rights Agreement. Notwithstanding the foregoing, no amendment may be made at such time as the Rights are not redeemable. 

Anti-Takeover Effects. 

The Rights may have certain anti-takeover effects. The Rights may cause substantial dilution to any person or group that attempts to acquire
the Company without the approval of the Board. As a result, the overall effect of the Rights may be render more difficult or discourage a merger, tender offer or other business combination involving the Company that is not supported by the Board.

 A copy of the Rights Agreement has been or will be filed with the Securities and Exchange Commission as an Exhibit to a Registration
Statement on Form 8-A or a Current Report on Form 8-K. A copy of the Rights Agreement is available free of charge from the Company. This summary description of the Rights does not purport to be complete and is qualified in its entirety by reference
to the Rights Agreement, which is incorporated herein by reference. 

  
 49

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