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Exhibit 10.1  

 
 

STARENT NETWORKS, CORP.    
    
    2000 STOCK INCENTIVE PLAN    

        1.    Purpose.    

        The
purpose of this 2000 Stock Incentive Plan (the "Plan") of Starent Networks, Corp., a Delaware corporation (the "Company"), is to advance the interests of the Company's stockholders
by enhancing the Company's ability to attract, retain and motivate persons who make (or are expected to make) important contributions to the Company by providing such persons with equity ownership
opportunities and performance-based incentives and thereby better aligning the interests of such persons with those of the Company's stockholders. Except where the context otherwise requires, the term
"Company" shall include any of the Company's present or future subsidiary corporations as defined in Section 424(f) of the Internal Revenue Code of 1986, as amended, and any regulations
promulgated thereunder (the "Code"). 

        2.    Eligibility.    

        All
of the Company's employees, officers, directors, consultants and advisors are eligible to be granted options, restricted stock awards, or other stock-based awards (each, an "Award")
under the Plan. Each person who has been granted an Award under the Plan shall be deemed a "Participant". 

        3.    Administration, Delegation.    

        (a)    Administration by Board of Directors.    The Plan will be administered by the Board of Directors of the Company
(the "Board"). The Board shall have authority to grant Awards and to adopt, amend and repeal such administrative rules, guidelines and practices relating to the Plan as it shall deem advisable. The
Board may correct any defect, supply any omission or reconcile any inconsistency in the Plan or any Award in the manner and to the extent it shall deem expedient to carry the Plan into effect and it
shall be the sole and final judge of such expediency. All decisions by the Board shall be made in the Board's sole discretion and shall be final and binding on all persons having or claiming any
interest in the Plan or in any Award. No director or person acting pursuant to the authority delegated by the Board shall be liable for any action or determination relating to or under the Plan made
in good faith. 

        (b)    Delegation to Executive Officers.    To the extent permitted by applicable law, the Board may delegate to one
or more executive officers of the Company the power to make Awards and exercise such other powers under the Plan as the Board may determine, provided that the Board shall fix the maximum number of
shares subject to Awards and the maximum number of shares for any one Participant to be made by such executive officers. 

        (c)    Appointment of Committees.    To the extent permitted by applicable law, the Board may delegate any or all of
its powers under the Plan to one or more committees or subcommittees of the Board (a "Committee"). If and when the common stock, $.001 par value per share, of the Company (the "Common Stock") is
registered under the Securities Exchange Act of 1934 (the "Exchange Act"), the Board shall appoint one such Committee of not less than two members, each member of which shall be an "outside director"
within the meaning of Section 162(m) of the Code and a "non-employee director" as defined in Rule 16b-3 promulgated under the Exchange Act. All references in the
Plan to the "Board" shall mean the Board or a Committee of the Board or the executive officer referred to in Section 3(b) to the extent that the Board's powers or authority under the Plan have
been delegated to such Committee or executive officer. 

        4.    Stock Available for Awards.    

        (a)    Number of Shares.    Subject to adjustment under Section 8, Awards may be made under the Plan for up to
8,888,889 shares of Common Stock. If any Award expires or is terminated, surrendered 

 

or
canceled without having been fully exercised or is forfeited in whole or in part or results in any Common Stock not being issued, the unused Common Stock covered by such Award shall again be
available for the grant of Awards under the Plan, subject, however, in the case of Incentive Stock Options (as hereinafter defined), to any limitation required under the Code. Shares issued under the
Plan may consist in whole or in part of authorized but unissued shares or treasury shares. 

        (b)    Per-Participant Limit.    Subject to adjustment under Section 8, for Awards granted after
the Common Stock is registered under the Securities Exchange Act of 1934 (the "Exchange Act"), the maximum number of shares of Common Stock with respect to which Awards may be granted to any
Participant under the Plan shall be 500,000 per calendar year. The per-Participant limit described in this Section 4(b) shall be construed and applied consistently with
Section 162(m) of the Code ("Section 162(m)"). 

        5.    Stock Options.    

        (a)    General.    The Board may grant options to purchase Common Stock (each, an "Option") and determine the number
of shares of Common Stock to be covered by each Option, the exercise price of each Option and the conditions and limitations applicable to the exercise of each Option, including conditions relating to
applicable federal or state securities laws, as it considers necessary or advisable. An Option which is not intended to be an Incentive Stock Option (as hereinafter defined) shall be designated a
"Nonstatutory Stock Option". 

        (b)    Incentive Stock Options.    An Option that the Board intends to be an "incentive stock option" as defined in
Section 422 of the Code (an "Incentive Stock Option") shall only be granted to employees of the Company and shall be subject to and shall be construed consistently with the requirements of
Section 422 of the Code. The Company shall have no liability to a Participant, or any other party, if an Option (or any part thereof) which is intended to be an Incentive Stock Option is not an
Incentive Stock Option. 

        (c)    Exercise Price.    The Board shall establish the exercise price at the time each Option is granted and specify
it in the applicable option agreement. 

        (d)    Duration of Options.    Each Option shall be exercisable at such times and subject to such terms and conditions
as the Board may specify in the applicable option agreement, provided, however, that no Option will be granted for a term in excess of 10 years. 

        (e)    Exercise of Option.    Options may be exercised by delivery to the Company of a written notice of exercise
signed by the proper person or by any other form of notice (including electronic notice) approved by the Board together with payment in full as specified in Section 5(f) for the number of
shares for which the Option is exercised. 

        (f)    Payment Upon Exercise.    Common Stock purchased upon the exercise of an Option granted under the Plan shall be
paid for as follows: 

        (1)   in
cash or by check, payable to the order of the Company; 

        (2)   except
as the Board may, in its sole discretion, otherwise provide in an option agreement, by (i) delivery of an irrevocable and unconditional undertaking by a
creditworthy broker to deliver promptly to the Company sufficient funds to pay the exercise price or (ii) delivery by the Participant to the Company of a copy of irrevocable and unconditional
instructions to a creditworthy broker to deliver promptly to the Company cash or a check sufficient to pay the exercise price; 

        (3)   when
the Common Stock is registered under the Exchange Act, by delivery of shares of Common Stock owned by the Participant valued at their fair market value as
determined by (or in a manner approved by) the Board in good faith ("Fair Market Value"), provided (i) such method 

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of
payment is then permitted under applicable law and (ii) such Common Stock was owned by the Participant at least six months prior to such delivery; 

        (4)   to
the extent permitted by the Board, in its sole discretion by (i) delivery of a promissory note of the Participant to the Company on terms determined by the
Board, or (ii) payment of such other lawful consideration as the Board may determine; or 

        (5)   by
any combination of the above permitted forms of payment. 

        6.    Restricted Stock.    

        (a)    Grants.    The Board may grant Awards entitling recipients to acquire shares of Common Stock, subject to the
right of the Company to repurchase all or part of such shares at their issue price or other stated or formula price (or to require forfeiture of such shares if issued at no cost) from the recipient in
the event that conditions specified by the Board in the applicable Award are not satisfied prior to the end of the applicable restriction period or periods established by the Board for such Award
(each, a "Restricted Stock Award"). 

        (b)    Terms and Conditions.    The Board shall determine the terms and conditions of any such Restricted Stock Award,
including the conditions for repurchase (or forfeiture) and the issue price, if any. Any stock certificates issued in respect of a Restricted Stock Award shall be registered in the name of the
Participant and, unless otherwise determined by the Board, deposited by the Participant, together with a stock power endorsed in blank, with the Company (or its designee). At the expiration of the
applicable restriction periods, the Company (or such designee) shall deliver the certificates no longer subject to such restrictions to the Participant or if the Participant has died, to the
beneficiary designated, in a manner determined by the Board, by a Participant to receive amounts due or exercise rights of the Participant in the event of the Participant's death (the "Designated
Beneficiary"). In the absence of an effective designation by a Participant, Designated Beneficiary shall mean the Participant's estate. 

        7.    Other Stock-Based Awards.    The Board shall have the right to grant other Awards based upon the Common Stock
having such terms and conditions as the Board may determine, including the grant of shares based upon certain conditions, the grant of securities convertible into Common Stock and the grant of stock
appreciation rights. 

        8.    Adjustments for Changes in Common Stock and Certain Other Events.    

        (a)    Changes in Capitalization.    In the event of any stock split, reverse stock split, stock dividend,
recapitalization, combination of shares, reclassification of shares, spin-off or other similar change in capitalization or event, or any distribution to holders of Common Stock other than
a normal cash dividend, (i) the number and class of securities available under this Plan, (ii) the per-Participant limit set forth in Section 4(b), (iii) the
number and class of securities and exercise price per share subject to each outstanding Option, (iv) the repurchase price per share subject to each outstanding Restricted Stock Award, and
(v) the terms of each other outstanding Award shall be appropriately adjusted by the Company (or substituted Awards may be made, if applicable) to the extent the Board shall determine, in good
faith, that such an adjustment (or substitution) is necessary and appropriate. If this Section 8(a) applies and Section 8(c) also applies to any event, Section 8(c) shall be
applicable to such event, and this Section 8(a) shall not be applicable. 

        (b)    Liquidation or Dissolution.    In the event of a proposed liquidation or dissolution of the Company, the Board
shall upon written notice to the Participants provide that all then unexercised Options will (i) become exercisable in full as of a specified time at least 10 business days prior to the
effective date of such liquidation or dissolution and (ii) terminate effective upon such liquidation or dissolution, except to the extent exercised before such effective date. The Board may
specify the effect 

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of
a liquidation or dissolution on any Restricted Stock Award or other Award granted under the Plan at the time of the grant of such Award. 

        (c)    Acquisition Events.    

        (1)    Definition.    An "Acquisition Event" shall mean: (a) any merger or consolidation of the Company with or
into another entity as a result of which the Common Stock is converted into or exchanged for the right to receive cash, securities or other property or (b) any exchange of shares of the Company
for cash, securities or other property pursuant to a statutory share exchange transaction. 

        (d)    Consequences of an Acquisition Event on Options.    Upon the occurrence of an Acquisition Event, or the
execution by the Company of any agreement with respect to an Acquisition Event, the Board shall provide that all outstanding Options shall be assumed, or equivalent options shall be substituted, by
the acquiring or succeeding corporation (or an affiliate thereof). For purposes hereof, an Option shall be considered to be assumed if, following consummation of the Acquisition Event, the Option
confers the right to purchase, for each share of Common Stock subject to the Option immediately prior to the consummation of the Acquisition Event, the consideration (whether cash, securities or other
property) received as a result of the Acquisition Event by holders of Common Stock for each share of Common Stock held immediately prior to the consummation of the Acquisition Event (and if holders
were offered a choice of consideration, the type of consideration chosen by the holders of a majority of the outstanding shares of Common Stock); provided, however, that if the consideration received
as a result of the Acquisition Event is not solely common stock of the acquiring or succeeding corporation (or an affiliate thereof), the Company may, with the consent of the acquiring or succeeding
corporation, provide for the consideration to be received upon the exercise of Options to consist solely of common stock of the acquiring or succeeding corporation (or an affiliate thereof) equivalent
in fair market value to the per share consideration received by holders of outstanding shares of Common Stock as a result of the Acquisition Event. 

        (e)   Notwithstanding
the foregoing, if the acquiring or succeeding corporation (or an affiliate thereof) does not agree to assume, or substitute for, such Options, then the
Board shall, upon written notice to the Participants, provide that all then unexercised Options will become exercisable in full as of a specified time prior to the Acquisition Event and will terminate
immediately prior to the consummation of such Acquisition Event, except to the extent exercised by the Participants before the consummation of such Acquisition Event; provided, however, that in the
event of an Acquisition Event under the terms of which holders of Common Stock will receive upon consummation thereof a cash payment for each share of Common Stock surrendered pursuant to such
Acquisition Event (the "Acquisition Price"), then the Board may instead provide that all outstanding Options shall terminate upon consummation of such Acquisition Event and that each Participant shall
receive, in exchange therefor, a cash payment equal to the amount (if any) by which (A) the Acquisition Price multiplied by the number of shares of Common Stock subject to such outstanding
Options (whether or not then exercisable), exceeds (B) the aggregate exercise price of such Options. 

        (f)    Consequences of an Acquisition Event on Restricted Stock Awards.    Upon the occurrence of an Acquisition
Event, the repurchase and other rights of the Company under each outstanding Restricted Stock Award shall inure to the benefit of the Company's successor and shall apply to the cash, securities or
other property which the Common Stock was converted into or exchanged for pursuant to such Acquisition Event in the same manner and to the same extent as they applied to the Common Stock subject to
such Restricted Stock Award. 

        (g)    Consequences of an Acquisition Event on Other Awards.    The Board shall specify the effect of an Acquisition
Event on any other Award granted under the Plan at the time of the grant of such Award. 

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        9.    General Provisions Applicable to Awards.    

        (a)    Transferability of Awards.    Except as the Board may otherwise determine or provide in an Award, Awards shall
not be sold, assigned, transferred, pledged or otherwise encumbered by the person to whom they are granted, either voluntarily or by operation of law, except by will or the laws of descent and
distribution, and, during the life of the Participant, shall be exercisable only by the Participant. References to a Participant, to the extent relevant in the context, shall include references to
authorized transferees. 

        (b)    Documentation.    Each Award shall be evidenced by a written instrument in such form as the Board shall
determine. Each Award may contain terms and conditions in addition to those set forth in the Plan. 

        (c)    Board Discretion.    Except as otherwise provided by the Plan, each Award may be made alone or in addition or
in relation to any other Award. The terms of each Award need not be identical, and the Board need not treat Participants uniformly. 

        (d)    Termination of Status.    The Board shall determine the effect on an Award of the disability, death,
retirement, authorized leave of absence or other change in the employment or other status of a Participant and the extent to which, and the period during which, the Participant, the Participant's
legal representative, conservator, guardian or Designated Beneficiary may exercise rights under the Award. 

        (e)    Withholding.    Each Participant shall pay to the Company, or make provision satisfactory to the Board for
payment of, any taxes required by law to be withheld in connection with Awards to such Participant no later than the date of the event creating the tax liability. Except as the Board may otherwise
provide in an Award, when the Common Stock is registered under the Exchange Act, Participants may, to the extent then permitted under applicable law, satisfy such tax obligations in whole or in part
by delivery of shares of Common Stock, including shares retained from the Award creating the tax obligation, valued at their Fair Market Value. The Company may, to the extent permitted by law, deduct
any such tax obligations from any payment of any kind otherwise due to a Participant. 

        (f)    Amendment of Award.    The Board may amend, modify or terminate any outstanding Award, including but not
limited to, substituting therefor another Award of the same or a different type, changing the date of exercise or realization, and converting an Incentive Stock Option to a Nonstatutory Stock Option,
provided that the Participant's consent to such action shall be required unless the Board determines in its sole discretion that the action, taking into account any related action, would not
materially and adversely affect the Participant. Any such determination of the Board, made in good faith, shall be final and conclusive. 

        (g)    Conditions on Delivery of Stock.    The Company will not be obligated to deliver any shares of Common Stock
pursuant to the Plan or to remove restrictions from shares previously delivered under the Plan until (i) all conditions of the Award have been met or removed to the satisfaction of the Company,
(ii) in the opinion of the Company's counsel, all other legal matters in connection with the issuance and delivery of such shares have been satisfied, including any applicable securities laws
and any applicable stock exchange or stock market rules and regulations, and (iii) the Participant has executed and delivered to the Company such representations or agreements as the Company
may consider appropriate to satisfy the requirements of any applicable laws, rules or regulations. 

        (h)    Acceleration.    The Board may at any time provide that any Options shall become immediately exercisable in
full or in part, that any Restricted Stock Awards shall be free of restrictions in full or in part or that any other Awards may become exercisable in full or in part or free of some or all
restrictions or conditions, or otherwise realizable in full or in part, as the case may be. 

5

 

        10.    Miscellaneous.    

        (a)    No Right To Employment or Other Status.    No person shall have any claim or right to be granted an Award, and
the grant of an Award shall not be construed as giving a Participant the right to continued employment or any other relationship with the Company. The Company expressly reserves the right at any time
to dismiss or otherwise terminate its relationship with a Participant free from any liability or claim under the Plan, except as expressly provided in the applicable Award. 

        (b)    No Rights As Stockholder.    Subject to the provisions of the applicable Award, no Participant or Designated
Beneficiary shall have any rights as a stockholder with respect to any shares of Common Stock to be distributed with respect to an Award until becoming the record holder of such shares.
Notwithstanding the foregoing, in the event the Company effects a split of the Common Stock by means of a stock dividend and the exercise price of and the number of shares subject to such Option are
adjusted as of the date of the distribution of the dividend (rather than as of the record date for such dividend), then an optionee who exercises an Option between the record date and the distribution
date for such stock dividend shall be entitled to receive, on the distribution date, the stock dividend with respect to the shares of Common Stock acquired upon such Option exercise, notwithstanding
the
fact that such shares were not outstanding as of the close of business on the record date for such stock dividend. 

        (c)    Effective Date and Term of Plan.    The Plan shall become effective on the date on which it is adopted by the
Board. No Awards shall be granted under the Plan after the completion of ten years from the earlier of (i) the date on which the Plan was adopted by the Board or (ii) the date the Plan
was approved by the Company's stockholders, but Awards previously granted may extend beyond that date. 

        (d)    Amendment of Plan.    The Board may amend, suspend or terminate the Plan or any portion thereof at any time. 

        (e)    Governing Law.    The provisions of the Plan and all Awards made hereunder shall be governed by and interpreted
in accordance with the laws of the State of Delaware, without regard to any applicable conflicts of law. 

[The
remainder of this page has been intentionally left blank] 

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First Amendment to 2000 Incentive Plan  

        The number of shares in the first sentence of Section 4(a) of the Corporation's 2000 Stock Incentive Plan be and hereby is deleted and replaced with
9,638,889. 

Second Amendment to 2000 Incentive Plan  

        The number of shares in the first sentence of Section 4(a) of the Corporation's 2000 Stock Incentive Plan be and hereby is deleted and replaced with
10,138,889. 

Third Amendment to 2000 Incentive Plan  

        The number of shares in the first sentence of Section 4(a) of the Corporation's 2000 Stock Incentive Plan be and hereby is deleted and replaced with
11,725,206. 

Fourth Amendment to 2000 Incentive Plan  

        The number of shares in the first sentence of Section 4(a) of the Corporation's 2000 Stock Incentive Plan be and hereby is deleted and replaced with
12,475,206. 

Fifth Amendment to 2000 Incentive Plan  

        The number of shares in the first sentence of Section 4(a) of the Corporation's 2000 Stock Incentive Plan be and hereby is deleted and replaced with
13,675,206. 

Sixth Amendment to 2000 Incentive Plan  

        The number of shares in the first sentence of Section 4(a) of the Corporation's 2000 Stock Incentive Plan be and hereby is deleted and replaced with
15,425,206. 

Seventh Amendment to 2000 Incentive Plan  

        The number of shares in the first sentence of Section 4(a) of the Corporation's 2000 Stock Incentive Plan be and hereby is deleted and replaced with
19,825,206. 

Eighth Amendment to 2000 Incentive Plan  

        The number of shares in the first sentence of Section 4(a) of the Corporation's 2000 Stock Incentive Plan be and hereby is deleted and replaced with
22,225,206. 

Ninth Amendment to 2000 Incentive Plan  

        The number of shares in the first sentence of Section 4(a) of the Corporation's 2000 Stock Incentive Plan be and hereby is deleted and replaced with
24,225,206. 

Tenth Amendment to 2000 Incentive Plan  

        The number of shares in the first sentence of Section 4(a) of the Corporation's 2000 Stock Incentive Plan be and hereby is deleted and replaced with
25,225,206. 

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Exhibit 10.2  

 
 

STARENT NETWORKS, CORP.    
    

Nonstatutory Stock Option Agreement
 Granted Under 2000 Stock Incentive Plan

1.    Grant of Option.    

        This
agreement evidences the grant by Starent Networks, Corp., a Delaware corporation (the "Company"), on                  , 200    (the "Grant
Date") to                  , a
director of the Company (the "Participant"), of an option to purchase, in whole or in part, on the terms provided herein and in the Company's 2000 Stock Incentive Plan (the "Plan"), a total of
                  shares (the "Shares") of common stock, par value $0.001 per share, of the Company ("Common Stock") at $1.10 per Share. The Start of Vesting
Date is                  , 200    .
Unless earlier terminated, this option shall expire 10 years after the Grant Date (the "Final Exercise Date"). 

        It
is intended that the option evidenced by this agreement shall not be an incentive stock option as defined in Section 422 of the Internal Revenue Code of 1986, as amended and
any regulations promulgated thereunder (the "Code"). Except as otherwise indicated by the context, the term "Participant", as used in this option, shall be deemed to include any person who acquires
the right to exercise this option validly under its terms. 

2.    Vesting Schedule.    

        (a)   This
option will become exercisable ("vest") as to 25% of the original number of Shares (the "Initial Vesting Amount") on the first anniversary of the Start of Vesting
Date ("SOV") and as to an additional 6.25% of the original number of Shares at the end of each successive three-month period following the first anniversary of the SOV until the fourth anniversary of
the SOV (the "End Date"). 

        The
right of exercise shall be cumulative so that to the extent the option is not exercised in any period to the maximum extent permissible it shall continue to be exercisable, in whole
or in part, with respect to all shares for which it is vested until the earlier of the Final Exercise Date or the termination of this option under Section 3 hereof or the Plan. 

        (b)   In
the event of a Change of Control (as defined below), notwithstanding anything herein to the contrary, immediately prior to the closing of the Change of Control the
option will automatically vest in full and be fully exercisable. 

        (c)   For
the purposes of this Agreement, "Change of Control" shall mean any (i) merger or consolidation which results in the voting securities of the Company
outstanding immediately prior thereto representing immediately thereafter (either by remaining outstanding or by being converted into voting securities of the surviving or acquiring entity (the
"Acquiror")) less than a majority of the combined voting power of the voting securities of the Company or the Acquiror outstanding immediately after such merger or consolidation, (ii) sale of
all or substantially all of the assets of the Company or (iii) sale of shares of capital stock of the Company, in a single transaction or series of related transactions, representing at least
80% of the voting power of the outstanding securities of the Company. 

3.    Exercise of Option.    

        (a)    Form of Exercise.    Each election to exercise this option shall be in writing, signed by the Participant, and
received by the Company at its principal office, accompanied by this agreement, and payment in full in the manner provided in the Plan. The Participant may purchase less than the number of shares
covered hereby, provided that no partial exercise of this option may be for any fractional share or for fewer than ten whole shares. 

        (b)    Continuous Relationship with the Company Required.    Except as otherwise provided in this Section 3,
this option may not be exercised unless the Participant, at the time he or she exercises this 

 

option,
is, and has been at all times since the Grant Date, an employee, officer or director of, or consultant or advisor to, the Company or any parent or subsidiary of the Company as defined in
Section 424(e) or (f) of the Code (an "Eligible Participant"). 

        (c)    Termination of Relationship with the Company.    If the Participant ceases to be an Eligible Participant for
any reason, then, except as provided in paragraphs (d) and (e) below, the right to exercise this option shall terminate three months after such cessation (but in no event after the Final
Exercise Date), provided that this option shall be exercisable only to the extent that the Participant was entitled to exercise this option on the date
of such cessation. Notwithstanding the foregoing, if the Participant, prior to the Final Exercise Date, violates the non-competition or confidentiality provisions of any employment
contract, confidentiality and nondisclosure agreement or other agreement between the Participant and the Company, the right to exercise this option shall terminate immediately upon written notice to
the Participant from the Company describing such violation. 

        (d)    Exercise Period Upon Death or Disability.    If the Participant dies or becomes disabled (within the meaning of
Section 22(e)(3) of the Code) prior to the Final Exercise Date while he or she is an Eligible Participant and the Company has not terminated such relationship for "cause" as specified in
paragraph (e) below, this option shall be exercisable, within the period of one year following the date of death or disability of the Participant, by the Participant (or in the case of death by
an authorized transferee), provided that this option shall be exercisable only to the extent that this option was exercisable by the Participant on the
date of his or her death or disability, and further provided that this option shall not be exercisable after the Final Exercise Date. 

        (e)    Termination for Cause.    If, prior to the Final Exercise Date, the Participant's service as a director of the
Company or employment or other relationship with the Company is terminated by the Company for "cause" (as defined below), the right to exercise this option shall terminate immediately upon the
effective date of such termination. "Cause" shall mean willful misconduct by the Participant or willful failure by the Participant to perform his or her responsibilities to the Company (including,
without limitation, breach by the Participant of any provision of any employment, consulting, advisory, nondisclosure, non-competition or other similar agreement between the Participant
and the Company), as determined by the Company, which determination shall be conclusive. The Participant shall be considered to have been discharged for "Cause" if the Company determines, within
30 days after the Participant's resignation, that discharge for cause was warranted. 

4.    Right of First Refusal.    

        (a)   If
the Participant proposes to sell, assign, transfer, pledge, hypothecate or otherwise dispose of, by operation of law or otherwise (collectively, "transfer") any
Shares acquired upon exercise of this option, then the Participant shall first give written notice of the proposed transfer (the "Transfer Notice") to the Company. The Transfer Notice shall name the
proposed transferee and state the number of such Shares the Participant proposes to transfer (the "Offered Shares"), the price per share and all other material terms and conditions of the transfer. 

        (b)   For
30 days following its receipt of such Transfer Notice, the Company shall have the option to purchase all (but not less than all) of the Offered Shares at the
price and upon the terms set forth in the Transfer Notice. In the event the Company elects to purchase all of the Offered Shares, it shall give written notice of such election to the Participant
within such 30-day period. Within 10 days after his receipt of such notice, the Participant shall tender to the Company at its principal offices the certificate or certificates
representing the Offered Shares, duly endorsed in blank by the Participant or with duly endorsed stock powers attached thereto, all in a form suitable for transfer of the Offered Shares to the
Company. Promptly following receipt of such certificate or certificates, the Company shall deliver or mail to the Participant a check in payment of the purchase price for the Offered Shares;  provided that if the terms of payment set forth in the Transfer Notice were other than cash against delivery, the Company may pay for the Offered Shares
on the same terms and conditions as were set 

2

 

forth
in the Transfer Notice; and provided further that any delay in making such payment shall not invalidate the Company's exercise of its option to
purchase the Offered Shares. 

        (c)   If
the Company does not elect to acquire all of the Offered Shares, the Participant may, within the 30-day period following the expiration of the option
granted to the Company under subsection (b) above, transfer the Offered Shares to the proposed transferee, provided that such transfer shall not
be on terms and conditions more favorable to the transferee than those contained in the Transfer Notice. Notwithstanding any of the above, all Offered Shares transferred pursuant to this
Section 4 shall remain subject to the right of first refusal set forth in this Section 4 and such transferee shall, as a condition to such transfer, deliver to the Company a written
instrument confirming that such transferee shall be bound by all of the terms and conditions of this Section 4. 

        (d)   After
the time at which the Offered Shares are required to be delivered to the Company for transfer to the Company pursuant to subsection (b) above, the Company
shall not pay any dividend to the Participant on account of such Offered Shares or permit the Participant to exercise any of the privileges or rights of a stockholder with respect to such Offered
Shares, but shall, in so far as permitted by law, treat the Company as the owner of such Offered Shares. 

        (e)   The
following transactions shall be exempt from the provisions of this Section 4: 

        (1)   any
transfer of Shares to or for the benefit of any spouse, child or grandchild of the Participant, or to a trust for their benefit; 

        (2)   any
transfer pursuant to an effective registration statement filed by the Company under the Securities Act of 1933, as amended (the "Securities Act"); and 

        (3)   the
sale of all or substantially all of the shares of capital stock of the Company (including pursuant to a merger or consolidation); 

provided, however, that in the case of a transfer pursuant to clause (1) above, such Shares shall
remain subject to the right of first refusal set forth in this Section 4 and such transferee shall, as a condition to such transfer, deliver to the Company a written instrument confirming that
such transferee shall be bound by all of the terms and conditions of this Section 4. 

        (f)    The
Company may assign its rights to purchase Offered Shares in any particular transaction under this Section 4 to one or more persons or entities. 

        (g)   The
provisions of this Section 4 shall terminate upon the earlier of the following events: 

        (1)   the
closing of the sale of shares of Common Stock in an underwritten public offering pursuant to an effective registration statement filed by the Company under the
Securities Act; or 

        (2)   the
sale of all or substantially all of the capital stock, assets or business of the Company, by merger, consolidation, sale of assets or otherwise (other than a merger
or consolidation in which all or substantially all of the individuals and entities who were beneficial owners of the Common Stock immediately prior to such transaction beneficially own, directly or
indirectly, more than 75% of the outstanding securities entitled to vote generally in the election of directors of the resulting, surviving or acquiring corporation in such transaction). 

        (h)   The
Company shall not be required (a) to transfer on its books any of the Shares which shall have been sold or transferred in violation of any of the provisions
set forth in this Section 4, or (b) to treat as owner of such Shares or to pay dividends to any transferee to whom any such Shares shall have been so sold or transferred. 

5.    Agreement in Connection with Public Offering.    

        The
Participant agrees, in connection with the initial underwritten public offering of the Company's securities pursuant to a registration statement under the Securities Act,
(i) not to sell, make 

3

 

short
sale of, loan, grant any options for the purchase of, or otherwise dispose of any shares of Common Stock held by the Participant (other than those shares included in the offering) without the
prior written consent of the Company or the underwriters managing such initial underwritten public offering of the Company's securities for a period of 180 days from the effective date of such
registration statement, and (ii) to execute any agreement reflecting clause (i) above as may be requested by the Company or the managing underwriters at the time of such offering. 

6.    Withholding.    

        No
Shares will be issued pursuant to the exercise of this option unless and until the Participant pays to the Company, or makes provision satisfactory to the Company for payment of, any
federal, state or local withholding taxes required by law to be withheld in respect of this option. 

7.    Nontransferability of Option.    

        This
option may not be sold, assigned, transferred, pledged or otherwise encumbered by the Participant, either voluntarily or by operation of law, except by will or the laws of descent
and distribution, and, during the lifetime of the Participant, this option shall be exercisable only by the Participant. 

8.    Provisions of the Plan.    

        This
option is subject to the provisions of the Plan, a copy of which is furnished to the Participant with this option. 

[Remainder
of Page Intentionally Left Blank] 

4

 

        IN
WITNESS WHEREOF, the Company has caused this option to be executed under its corporate seal by its duly authorized officer. This option shall take effect as a sealed instrument. 

	

 	
 	
STARENT NETWORKS, CORP.
	

 	
 	

By:	

    
 John P. Delea, Jr.

Chief Financial Officer
	

 	
 	

Date:	

    

5

 
PARTICIPANT'S ACCEPTANCE 

        The
undersigned hereby accepts the foregoing option and agrees to the terms and conditions thereof. The undersigned also hereby acknowledges receipt of a copy of the Company's 2000 Stock
Incentive Plan. 

	

 	
 	

Participant's Signature:	
 	

    

	

 	
 	

Print Name:	
 	

    

	

 	
 	

Date:	
 	

    

	

 	
 	

Address:	
 	

    

	

 	
 	

 	
 	

    

	

For Starent HR Use Only:	
 	

Grant Date:	

    

	

 	
 	

Date Received:	

    

6

STARENT NETWORKS, CORP. 

Nonstatutory
Stock Option Agreement
 Granted Under 2000 Stock Incentive Plan

1.    Grant of Option.    

        This
agreement evidences the grant by Starent Networks, Corp., a Delaware corporation (the "Company"), on Date (the "Grant Date") to  Name a consultant of the
Company (the "Participant"), of an option to purchase, in whole or in part, on the terms provided herein and in the Company's
2000 Stock Incentive Plan (the "Plan"), a total of XXXX shares (the "Shares") of common stock, .001 par value per share, of the Company ("Common Stock")
at $.18 per Share. Start of Vesting date is Date, 2003. Unless earlier terminated, this option shall
expire on xxxxxxxx (the "Final Exercise Date"). 

        It
is intended that the option evidenced by this agreement shall not be an incentive stock option as defined in Section 422 of the Internal Revenue Code of 1986, as amended and
any regulations promulgated thereunder (the "Code"). Except as otherwise indicated by the context, the term "Participant", as used in this option, shall be deemed to include any person who acquires
the right to exercise this option validly under its terms. 

2.    Vesting Schedule.    

        (a)   This
option will become exercisable ("vest") as to 25% of the original number of Shares (the "Initial Vesting Amount") on the first anniversary of the Start of Vesting
Date ("SOV") and as to an additional 6.25% of the original number of Shares at the end of each successive three-month period following the first anniversary of the SOV until the fourth anniversary of
the SOV (the "End Date"). 

        The
right of exercise shall be cumulative so that to the extent the option is not exercised in any period to the maximum extent permissible it shall continue to be exercisable, in whole
or in part, with respect to all shares for which it is vested until the earlier of the Final Exercise Date or the termination of this option under Section 3 hereof or the Plan. 

        (b)   In
the event of an Acquisition (as defined below), then the option will automatically vest as to an additional amount equal to the Initial Vesting Amount (or such lesser
percentage of the original number of Shares that is then unvested) immediately prior to the closing of the Acquisition, the remaining unvested portion of this option shall continue to vest in
accordance with Section 2(a) above, and the End Date shall be accelerated by 12 months. 

        (c)   For
the purposes of this Agreement, "Acquisition" shall mean any (i) merger or consolidation which results in the voting securities of the Company outstanding
immediately prior thereto representing immediately thereafter (either by remaining outstanding or by being converted into voting securities of the surviving or acquiring entity (the "Acquiror")) less
than a majority of the combined voting power of the voting securities of the Company or the Acquiror outstanding immediately after such merger or consolidation, (ii) sale of all or
substantially all of the assets of the Company or (iii) sale of shares of capital stock of the Company, in a single transaction or series of related transactions, representing at least 80% of
the voting power of the outstanding securities of the Company. 

3.    Exercise of Option.    

        (a)    Form of Exercise.    Each election to exercise this option shall be in writing, signed by the Participant, and
received by the Company at its principal office, accompanied by this agreement, and payment in full in the manner provided in the Plan. The Participant may purchase less than the number of shares
covered hereby, provided that no partial exercise of this option may be for any fractional share or for fewer than ten whole shares. 

        (b)    Continuous Relationship with the Company Required.    Except as otherwise provided in this Section 3,
this option may not be exercised unless the Participant, at the time he or she exercises this option, is, and has been at all times since the Grant Date, an employee, officer or director of, or 

 

consultant
or advisor to, the Company or any parent or subsidiary of the Company as defined in Section 424(e) or (f) of the Code (an "Eligible Participant"). 

        (c)    Termination of Relationship with the Company.    If the Participant ceases to be an Eligible Participant for
any reason, then, except as provided in paragraphs (d) and (e) below, the right to exercise this option shall terminate three months after such cessation (but in no event after the Final
Exercise Date), provided that this option shall be exercisable only to the extent that the Participant was entitled to
exercise this option on the date of such cessation. Notwithstanding the foregoing, if the Participant, prior to the Final Exercise Date, violates the non-competition or confidentiality
provisions of any employment contract, confidentiality and nondisclosure agreement or other agreement between the Participant and the Company, the right to exercise this option shall terminate
immediately upon written notice to the Participant from the Company describing such violation. 

        (d)    Exercise Period Upon Death or Disability.    If the Participant dies or becomes disabled (within the meaning of
Section 22(e)(3) of the Code) prior to the Final Exercise Date while he or she is an Eligible Participant and the Company has not terminated such relationship for "cause" as specified in
paragraph (e) below, this option shall be exercisable, within the period of one year following the date of death or disability of the Participant, by the Participant,  provided that this option
shall be exercisable only to the extent that this option was exercisable by the Participant on the date of his or her death or
disability, and further provided that this option shall not be exercisable after the Final Exercise Date. 

        (e)    Discharge for Cause.    If the Participant, prior to the Final Exercise Date, is discharged by the Company for
"cause" (as defined below), the right to exercise this option shall terminate immediately upon the effective date of such discharge. "Cause" shall mean willful misconduct by the Participant or willful
failure by the Participant to perform his or her responsibilities to the Company (including, without limitation, breach by the Participant of any provision of any employment, consulting, advisory,
nondisclosure, non-competition or other similar agreement between the Participant and the Company), as determined by the Company, which determination shall be conclusive. The Participant
shall be considered to have been discharged for "Cause" if the Company determines, within 30 days after the Participant's resignation, that discharge for cause was warranted. 

4.    Right of First Refusal.    

        (a)   If
the Participant proposes to sell, assign, transfer, pledge, hypothecate or otherwise dispose of, by operation of law or otherwise (collectively, "transfer") any
Shares acquired upon exercise of this option, then the Participant shall first give written notice of the proposed transfer (the "Transfer Notice") to the Company. The Transfer Notice shall name the
proposed transferee and state the number of such Shares the Participant proposes to transfer (the "Offered Shares"), the price per share and all other material terms and conditions of the transfer. 

        (b)   For
30 days following its receipt of such Transfer Notice, the Company shall have the option to purchase all (but not less than all) of the Offered Shares at the
price and upon the terms set forth in the Transfer Notice. In the event the Company elects to purchase all of the Offered Shares, it shall give written notice of such election to the Participant
within such 30-day period. Within 10 days after his receipt of such notice, the Participant shall tender to the Company at its principal offices the certificate or certificates
representing the Offered Shares, duly endorsed in blank by the Participant or with duly endorsed stock powers attached thereto, all in a form suitable for transfer of the Offered Shares to the
Company. Promptly following receipt of such certificate or certificates, the Company shall deliver or mail to the Participant a check in payment of the purchase price for the Offered Shares;  provided that if the terms of payment set forth in the Transfer Notice were other than cash against delivery, the Company may pay for the Offered Shares
on the same terms and conditions as were set forth in the Transfer Notice; and provided further that any delay in making such payment shall not
invalidate the Company's exercise of its option to purchase the Offered Shares. 

2

 

        (c)   If
the Company does not elect to acquire all of the Offered Shares, the Participant may, within the 30-day period following the expiration of the option
granted to the Company under subsection (b) above, transfer the Offered Shares to the proposed transferee, provided that such transfer shall not
be on terms and conditions more favorable to the transferee than those contained in the Transfer Notice. Notwithstanding any of the above, all Offered Shares transferred pursuant to this
Section 4 shall remain subject to the right of first refusal set forth in this Section 4 and such transferee shall, as a condition to such transfer, deliver to the Company a written
instrument confirming that such transferee shall be bound by all of the terms and conditions of this Section 4. 

        (d)   After
the time at which the Offered Shares are required to be delivered to the Company for transfer to the Company pursuant to subsection (b) above, the Company
shall not pay any dividend to the Participant on account of such Offered Shares or permit the Participant to exercise any of the privileges or rights of a stockholder with respect to such Offered
Shares, but shall, in so far as permitted by law, treat the Company as the owner of such Offered Shares. 

        (e)   The
following transactions shall be exempt from the provisions of this Section 4: 

        (1)   any
transfer of Shares to or for the benefit of any spouse, child or grandchild of the Participant, or to a trust for their benefit; 

        (2)   any
transfer pursuant to an effective registration statement filed by the Company under the Securities Act of 1933, as amended (the "Securities Act"); and 

        (3)   the
sale of all or substantially all of the shares of capital stock of the Company (including pursuant to a merger or consolidation); 

provided, however, that in the case of a transfer pursuant to clause (1) above, such Shares shall
remain subject to the right of first refusal set forth in this Section 4 and such transferee shall, as a condition to such transfer, deliver to the Company a written instrument confirming that
such transferee shall be bound by all of the terms and conditions of this Section 4. 

        (f)    The
Company may assign its rights to purchase Offered Shares in any particular transaction under this Section 4 to one or more persons or entities. 

        (g)   The
provisions of this Section 4 shall terminate upon the earlier of the following events: 

        (1)   the
closing of the sale of shares of Common Stock in an underwritten public offering pursuant to an effective registration statement filed by the Company under the
Securities Act; or 

        (2)   the
sale of all or substantially all of the capital stock, assets or business of the Company, by merger, consolidation, sale of assets or otherwise (other than a merger
or consolidation in which all or substantially all of the individuals and entities who were beneficial owners of the Common Stock immediately prior to such transaction beneficially own, directly or
indirectly, more than 75% of the outstanding securities entitled to vote generally in the election of directors of the resulting, surviving or acquiring corporation in such transaction). 

        (h)   The
Company shall not be required (a) to transfer on its books any of the Shares which shall have been sold or transferred in violation of any of the provisions
set forth in this Section 4, or (b) to treat as owner of such Shares or to pay dividends to any transferee to whom any such Shares shall have been so sold or transferred. 

5.    Agreement in Connection with Public Offering.    

        The
Participant agrees, in connection with the initial underwritten public offering of the Company's securities pursuant to a registration statement under the Securities Act,
(i) not to sell, make short sale of, loan, grant any options for the purchase of, or otherwise dispose of any shares of Common Stock held by the Participant (other than those shares included in
the offering) without the 

3

 

prior
written consent of the Company or the underwriters managing such initial underwritten public offering of the Company's securities for a period of 180 days from the effective date of such
registration statement, and (ii) to execute any agreement reflecting clause (i) above as may be requested by the Company or the managing underwriters at the time of such offering. 

6.    Withholding.    

        No
Shares will be issued pursuant to the exercise of this option unless and until the Participant pays to the Company, or makes provision satisfactory to the Company for payment of, any
federal, state or local withholding taxes required by law to be withheld in respect of this option. 

7.    Nontransferability of Option.    

        This
option may not be sold, assigned, transferred, pledged or otherwise encumbered by the Participant, either voluntarily or by operation of law, except by will or the laws of descent
and distribution, and, during the lifetime of the Participant, this option shall be exercisable only by the Participant. 

8.    Provisions of the Plan.    

        This
option is subject to the provisions of the Plan, a copy of which is furnished to the Participant with this option. 

        IN
WITNESS WHEREOF, the Company has caused this option to be executed under its corporate seal by its duly authorized officer. This option shall take effect as a sealed instrument. 

	

 	
 	

STARENT NETWORKS, CORP.
	

Dated:	
 	

By:	

    

	 	 	 	Name:	John P. Delea, Jr.
	 	 	 	Title:	Vice President of Finance/CFO

4

 
PARTICIPANT'S ACCEPTANCE 

        The
undersigned hereby accepts the foregoing option and agrees to the terms and conditions thereof. The undersigned hereby acknowledges receipt of a copy of the Company's 2000 Stock
Incentive Plan. 

	

 	
 	

PARTICIPANT:	
 	

    

	

 	
 	

Address:	
 	

 

5

STARENT NETWORKS, CORP.  

Incentive Stock Option Agreement
 Granted Under 2000 Stock Incentive Plan

1.    Grant of Option.    

        This
agreement evidences the grant by Starent Networks, Corp., a Delaware corporation (the "Company"), on DATE, 2005 (the "Grant Date") to  NAME, an employee of
the Company (the "Participant"), of an option to purchase, in whole or in part, on the terms provided herein and in the Company's
2000 Stock Incentive Plan (the "Plan"), a total of NUMBER shares (the "Shares") of common stock, .001 par value per share, of the Company ("Common
Stock") at $PRICE per Share. Your Start of Vesting date is DATE, 2005. Unless earlier terminated, this
option shall expire 10 years after the Grant Date (the "Final Exercise Date"). 

        It
is intended that the option evidenced by this agreement shall be an incentive stock option as defined in Section 422 of the Internal Revenue Code of 1986, as amended and any
regulations promulgated thereunder (the "Code"). Except as otherwise indicated by the context, the term "Participant", as used in this option, shall be deemed to include any person who acquires the
right to exercise this option validly under its terms. 

2.    Vesting Schedule.    

        (a)   This
option will become exercisable ("vest") as to 25% of the original number of Shares (the "Initial Vesting Amount") on the first anniversary of the Start of Vesting
Date ("SOV") and as to an additional 6.25% of the original number of Shares at the end of each successive three-month period following the first anniversary of the SOV until the fourth anniversary of
the SOV (the "End Date"). 

        The
right of exercise shall be cumulative so that to the extent the option is not exercised in any period to the maximum extent permissible it shall continue to be exercisable, in whole
or in part, with respect to all shares for which it is vested until the earlier of the Final Exercise Date or the termination of this option under Section 3 hereof or the Plan. 

        (b)   In
the event of an Acquisition (as defined below), then the option will automatically vest as to an additional amount equal to the Initial Vesting Amount (or such lesser
percentage of the original number of Shares that is then unvested) immediately prior to the closing of the Acquisition, the remaining unvested portion of this option shall continue to vest in
accordance with Section 2(a) above, and the End Date shall be accelerated by 12 months. 

        For
the purposes of this Agreement, "Acquisition" shall mean any (i) merger or consolidation which results in the voting securities of the Company outstanding immediately prior
thereto representing immediately thereafter (either by remaining outstanding or by being converted into voting securities of the surviving or acquiring entity (the "Acquiror")) less than a majority of
the combined voting power of the voting securities of the Company or the Acquiror outstanding immediately after such merger or consolidation, (ii) sale of all or substantially all of the assets
of the Company or (iii) sale of shares of capital stock of the Company, in a single transaction or series of related transactions, representing at least 80% of the voting power of the
outstanding securities of the Company. 

        (c)   Notwithstanding
anything to the contrary herein, if the Participant is (i) on inactive status with the Company for more than three (3) consecutive months
or three (3) months in any calendar year, whether because such Participant is temporarily disabled and unable to perform his or her duties for the Company, takes a leave of absence from his or
her duties for the Company, or is inactive for at least such period of time for any other reason, but (ii) continues to be an employee of the Company during such period, then such Participant
shall not vest in any shares pursuant to this Section 2 for the portion of such inactive period which is greater than three (3) months. In such event, the Participant shall recommence
vesting of the option upon the first day of the calendar month immediately following the end of such period of disability or leave of absence. 

 

3.    Exercise of Option.    

        (a)    Form of Exercise    Each election to exercise this option shall be in writing, signed by the Participant, and
received by the Company at its principal office, accompanied by this agreement, and payment in full through (i) in cash or by check, payable to the order of the Company, (ii) except as
the Board may, in its sole discretion, otherwise provide in an option agreement, by (A) delivery of an irrevocable and unconditional undertaking by a creditworthy broker to deliver promptly to
the Company sufficient funds to pay the exercise price or (B) delivery by the Participant to the Company of a copy of irrevocable and unconditional instructions to a creditworthy broker to
deliver promptly to the Company cash or a check sufficient to pay the exercise price, (iii) when the Common Stock is registered under the
Exchange Act, by delivery of shares of Common Stock owned by the Participant valued at their fair market value as determined by (or in a manner approved by) the Board in good faith ("Fair Market
Value"), provided (A) such method of payment is then permitted under applicable law and (B) such Common Stock was owned by the Participant at least six months prior to such delivery,
(iv) delivery of a promissory note of the Participant to the Company on terms determined by the Board, or (v) payment of such other lawful consideration as the Board may determine. The
Participant may purchase less than the number of shares covered hereby, provided that no partial exercise of this option may be for any fractional share or for fewer than ten whole shares. 

        (b)    Continuous Relationship with the Company Required.    Except as otherwise provided in this Section 3,
this option may not be exercised unless the Participant, at the time he or she exercises this option, is, and has been at all times since the Grant Date, an employee, officer or director of, or
consultant or advisor to, the Company or any parent or subsidiary of the Company as defined in Section 424(e) or (f) of the Code (an "Eligible Participant"). 

        (c)    Termination of Relationship with the Company.    If the Participant ceases to be an Eligible Participant for
any reason, then, except as provided in paragraphs (d) and (e) below, the right to exercise this option shall terminate three months after such cessation (but in no event after the Final
Exercise Date), provided that this option shall be exercisable only to the extent that the Participant was entitled to exercise this option on the date
of such cessation. Notwithstanding the foregoing, if the Participant, prior to the Final Exercise Date, violates the non-competition or confidentiality provisions of any employment
contract, confidentiality and nondisclosure agreement or other agreement between the Participant and the Company, the right to exercise this option shall terminate immediately upon written notice to
the Participant from the Company describing such violation. 

        (d)    Exercise Period Upon Death or Disability.    If the Participant dies or becomes disabled (within the meaning of
Section 22(e)(3) of the Code) prior to the Final Exercise Date while he or she is an Eligible Participant and the Company has not terminated such relationship for "cause" as specified in
paragraph (e) below, this option shall be exercisable, within the period of one year following the date of death or disability of the Participant by the Participant,  provided that this option shall
be exercisable only to the extent that this option was exercisable by the Participant on the date of his or her death or
disability, and further provided that this option shall not be exercisable after the Final Exercise Date. 

        (e)    Discharge for Cause.    If the Participant, prior to the Final Exercise Date, is discharged by the Company for
"cause" (as defined below), the right to exercise this option shall terminate immediately upon the effective date of such discharge. "Cause" shall mean willful misconduct by the Participant or willful
failure by the Participant to perform his or her responsibilities to the Company (including, without limitation, breach by the Participant of any provision of any employment, consulting, advisory,
nondisclosure, non-competition or other similar agreement between the Participant and the Company), as determined by the Company, which determination shall be conclusive. The Participant
shall be considered to have been discharged for "Cause" if the Company determines, within 30 days after the Participant's resignation, that discharge for cause was warranted. 

2

 

4.    Right of First Refusal.    

        (a)   If
the Participant proposes to sell, assign, transfer, pledge, hypothecate or otherwise dispose of, by operation of law or otherwise (collectively, "transfer") any
Shares acquired upon exercise of this option, then the Participant shall first give written notice of the proposed transfer (the "Transfer Notice") to the Company. The Transfer Notice shall name the
proposed transferee and state the number of such Shares the Participant proposes to transfer (the "Offered Shares"), the price per share and all other material terms and conditions of the transfer. 

        (b)   For
30 days following its receipt of such Transfer Notice, the Company shall have the option to purchase all (but not less than all) of the Offered Shares at the
price and upon the terms set forth in the Transfer Notice. In the event the Company elects to purchase all of the Offered Shares, it shall give written notice of such election to the Participant
within such 30-day period. Within 10 days after his receipt of such notice, the Participant shall tender to the Company at its principal offices the certificate or certificates
representing the Offered Shares, duly endorsed in blank by the Participant or with duly endorsed stock powers attached thereto, all in a form suitable for transfer of the Offered Shares to the
Company. Promptly following receipt of such certificate or certificates, the Company shall deliver or mail to the Participant a check in payment of the purchase price for the Offered Shares;  provided that if the terms of payment set forth in the Transfer Notice were other than cash against delivery, the Company may pay for the Offered Shares
on the same terms and conditions as were set forth in the Transfer Notice; and provided further that any delay in making such payment shall not
invalidate the Company's exercise of its option to purchase the Offered Shares. 

        (c)   If
the Company does not elect to acquire all of the Offered Shares, the Participant may, within the 30-day period following the expiration of the option
granted to the Company under subsection (b) above, transfer the Offered Shares to the proposed transferee, provided that such transfer shall not
be on terms and conditions more favorable to the transferee than those contained in the Transfer Notice. Notwithstanding any of the above, all Offered Shares transferred pursuant to this
Section 4 shall remain subject to the right of first refusal set forth in this Section 4 and such transferee shall, as a condition to such transfer, deliver to the Company a written
instrument confirming that such transferee shall be bound by all of the terms and conditions of this Section 4. 

        (d)   After
the time at which the Offered Shares are required to be delivered to the Company for transfer to the Company pursuant to subsection (b) above, the Company
shall not pay any dividend to the Participant on account of such Offered Shares or permit the Participant to exercise any of the privileges or rights of a stockholder with respect to such Offered
Shares, but shall, in so far as permitted by law, treat the Company as the owner of such Offered Shares. 

        (e)   The
following transactions shall be exempt from the provisions of this Section 4: 

        (1)   any
transfer of Shares to or for the benefit of any spouse, child or grandchild of the Participant, or to a trust for their benefit; 

        (2)   any
transfer pursuant to an effective registration statement filed by the Company under the Securities Act of 1933, as amended (the "Securities Act"); and 

        (3)   the
sale of all or substantially all of the shares of capital stock of the Company (including pursuant to a merger or consolidation); 

provided, however, that in the case of a transfer pursuant to clause (1) above, such Shares shall
remain subject to the right of first refusal set forth in this Section 4 and such transferee shall, as a condition to such transfer, deliver to the Company a written instrument confirming that
such transferee shall be bound by all of the terms and conditions of this Section 4. 

        (f)    The
Company may assign its rights to purchase Offered Shares in any particular transaction under this Section 4 to one or more persons or entities. 

3

 

        (g)   The
provisions of this Section 4 shall terminate upon the earlier of the following events: 

        (1)   the
closing of the sale of shares of Common Stock in an underwritten public offering pursuant to an effective registration statement filed by the Company under the
Securities Act; or 

        (2)   the
sale of all or substantially all of the capital stock, assets or business of the Company, by merger, consolidation, sale of assets or otherwise (other than a merger
or consolidation in which all or substantially all of the individuals and entities who were beneficial owners of the Common Stock immediately prior to such transaction beneficially own, directly or
indirectly, more than 75% of the outstanding securities entitled to vote generally in the election of directors of the resulting, surviving or acquiring corporation in such transaction). 

        (h)   The
Company shall not be required (a) to transfer on its books any of the Shares which shall have been sold or transferred in violation of any of the provisions
set forth in this Section 4, or (b) to treat as owner of such Shares or to pay dividends to any transferee to whom any such Shares shall have been so sold or transferred. 

5.    Agreement in Connection with Public Offering.    

        The
Participant agrees, in connection with the initial underwritten public offering of the Company's securities pursuant to a registration statement under the Securities Act,
(i) not to sell, make short sale of, loan, grant any options for the purchase of, or otherwise dispose of any shares of Common Stock held by the Participant (other than those shares included in
the offering) without the prior written consent of the Company or the underwriters managing such initial underwritten public offering of the Company's securities for a period of 180 days from
the effective date of such registration statement, and (ii) to execute any agreement reflecting clause (i) above as may be requested by the Company or the managing underwriters at the
time of such offering. 

6.    Withholding.    

        No
Shares will be issued pursuant to the exercise of this option unless and until the Participant pays to the Company, or makes provision satisfactory to the Company for payment of, any
federal, state or local withholding taxes required by law to be withheld in respect of this option. 

7.    Nontransferability of Option.    

        This
option may not be sold, assigned, transferred, pledged or otherwise encumbered by the Participant, either voluntarily or by operation of law, except by will or the laws of descent
and distribution, and, during the lifetime of the Participant, this option shall be exercisable only by the Participant. 

8.    Disqualifying Disposition.    

        If
the Participant disposes of Shares acquired upon exercise of this option within two years from the Grant Date or one year after such Shares were acquired pursuant to exercise of this
option, the Participant shall notify the Company in writing of such disposition. 

9.    Provisions of the Plan.    

        This
option is subject to the provisions of the Plan, a copy of which is furnished to the Participant with this option. 

4

 

        IN
WITNESS WHEREOF, the Company has caused this option to be executed under its corporate seal by its duly authorized officer. This option shall take effect as a sealed instrument. 

	

 	
 	
STARENT NETWORKS, CORP.
	

 	
 	

By:	

    
 John P. Delea, Jr.

VP of Finance/CFO
	 	 	Date:	    

5

 
PARTICIPANT'S ACCEPTANCE 

        The
undersigned hereby accepts the foregoing option and agrees to the terms and conditions thereof. The undersigned hereby acknowledges receipt of a copy of the Company's 2000 Stock
Incentive Plan. 

	

 	
 	

Participant's Signature:	
 	

    

	

 	
 	

Print Name:	
 	

    

	 	 	Date:	 	    

	 	 	Address:	 	    

	    	 	    	 	    

6

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STARENT NETWORKS, CORP.

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