Exhibit 10.6 ------------ FORM OF FIRST AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT ------------------------------------------------------------ This First Amended and Restated Investor Rights Agreement, dated as of September 22, 2000, is entered into by and among Convergent Networks, Inc., a Delaware corporation (the "Company"), Bing Yang, Hwang-Ruey Wang and John C. Thibault (individually, a "Management Stockholder" and, collectively, the "Management Stockholders"), the individuals and entities listed on Attachment A ------------ hereto (the "Existing Investors"), and the individuals and entities listed on Attachment B hereto (the "New Investors" and, collectively with the Existing - ------------ Investors, the "Investors"). BACKGROUND ---------- WHEREAS, the Company, the Management Stockholders and certain of the Existing Investors are parties to an Investor Rights Agreement dated as of July 14, 1998 (the "Original Agreement"); WHEREAS, the Original Agreement has been amended on February 10, 1999, July 1, 1999, December 17, 1999, February 15, 2000 and March 31, 2000; WHEREAS, the Original Agreement, as amended to date, may only be amended by a written instrument signed by the Company and stockholders holding at least 67% of the Registrable Shares (as defined below) held by all Stockholders (as defined below); WHEREAS, the undersigned hold at least 67% of the Registrable Shares held by all Stockholders; WHEREAS, the Company, certain of the Existing Investors and the New Investors have entered into a Series D Preferred Stock Purchase Agreement of even date herewith (the "Purchase Agreement"); and WHEREAS, the Company, the Management Stockholders and the Investors wish to amend and restate the Original Agreement in the manner set forth below; NOW, THEREFORE, in consideration of the mutual promises and covenants contained in this Agreement, and the consummation of the sale and purchase of the Series D Preferred Stock pursuant to the Purchase Agreement, and for other valuable consideration, receipt of which is hereby acknowledged, the parties hereto agree as follows: ARTICLE I. DEFINITIONS 1. Certain Definitions. As used in this Agreement, the following terms ------------------- shall have the following respective meanings: "Commission" means the United States Securities and Exchange ---------- Commission, or any other federal agency at the time administering the Securities Act. "Common Stock" means the Common Stock, $0.00001 par value, of the ------------ Company. "Exchange Act" means the Securities Exchange Act of 1934, as amended, ------------ or any similar federal statute, and the rules and regulations of the Commission issued under such Act, as they each may, from time to time, be in effect. "Initial Public Offering" means the initial public offering of shares ----------------------- of Common Stock pursuant to a Registration Statement at a price to the public of at least $20.44 per share (adjusted for stock splits, stock dividends and similar events) resulting in gross proceeds to the Company and any selling stockholders of at least $50,000,000. "Management Stockholders" means the Management Stockholders and any ----------------------- persons or entities to whom the rights granted and obligations assumed under this Agreement are transferred by the Management Stockholders, their successors or assigns pursuant to Section 2 of Article V. "Registration Statement" means a registration statement filed by the ---------------------- Company with the Commission for a public offering and sale of Common Stock (other than a registration statement on Form S-8 or Form S-4, or their successors, or any other form for a similar limited purpose, or any registration statement covering only securities proposed to be issued in exchange for securities or assets of another corporation). "Registration Expenses" means the expenses described in Section 4 of --------------------- Article III. "Registrable Shares" means (i) the shares of Common Stock issued or ------------------ issuable upon conversion of the Shares, (ii) with respect to Section 2 of Article III, shares of Common Stock held by the Management Stockholders, (iii) any shares of Common Stock, and any shares of Common Stock issued or issuable upon the conversion or exercise of any other securities, acquired by the Investors pursuant to Article IV of this Agreement, and (iv) any other shares of Common Stock issued in respect of such shares (because of stock splits, stock dividends, reclassifications, recapitalizations or similar events); provided, -------- however, that shares of Common Stock which are Registrable Shares shall cease to - ------- be Registrable Shares (a) upon any sale pursuant to a Registration Statement or Rule 144 under the Securities Act, (b) upon any sale in any manner to a person or entity which, by virtue of Section 2 of Article V, is not entitled to the rights provided by this Agreement, or (c) at such time as such shares are eligible for resale pursuant to Rule 144(k) under the Securities Act. Wherever reference is made in this Agreement to a request or consent of holders of a certain percentage of Registrable Shares, the determination of such percentage shall include shares of Common Stock issuable upon conversion of the Shares even if such conversion has not yet been effected. "Securities Act" means the Securities Act of 1933, as amended, or any -------------- similar federal statute, and the rules and regulations of the Commission issued under such Act, as they each may, from time to time, be in effect. "Shares" means (i) the shares of Series A Preferred Stock, $0.01 par ------ value per share, of the Company, (ii) the shares of Series B Preferred Stock, $0.01 par value per share, of the Company, (iii) the shares of Series C Preferred Stock, $0.01 par value per share, of the Company, and the shares of Series D Preferred Stock, $0.01 par value per share, of the Company. -2- "Stockholders" means the Investors and any persons or entities to whom ------------ the rights granted under this Agreement are transferred by the Investors, their successors or assigns pursuant to Section 2 of Article V. ARTICLE II. VOTING RIGHTS 1. Voting of Shares. In any and all elections of directors of the Company ---------------- (whether at a meeting or by written consent in lieu of a meeting), each Investor and Management Stockholder shall vote or cause to be voted all Voting Shares (as defined in Section 2 of Article II) owned by him or it, or over which he or it has voting control, and otherwise use his or its respective best efforts, so as to fix the number of directors at six and to elect as directors (i) one representative designated by the holders of a majority of the then outstanding shares of Common Stock, (ii) the Chief Executive Officer of the Company, (iii) one representative designated by Battery Ventures IV, L.P., (iv) one representative designated by Matrix Partners V, L.P., and (v) two representatives whom is neither a stockholder, director, officer or employee of the Company, to be agreed upon by the directors designated pursuant to clauses (ii), (iii) and (iv) above, one of whom is currently William Foster. 2. Voting Shares. "Voting Shares" shall mean and include any and all ------------- shares of the Common Stock, Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock and/or shares of capital stock of the Company, by whatever name called, which carry voting rights (including voting rights which arise by reason of default) which are now owned or subsequently acquired by an Investor or Management Stockholder, however acquired, including without limitation stock splits and stock dividends. 3. Restrictive Legend. All certificates representing Voting Shares owned ------------------ or hereafter acquired by the Investors and Management Stockholders or any transferee bound by this Agreement shall have affixed thereto a legend substantially in the following form: "The shares of stock represented by this certificate are subject to certain voting agreements as set forth in the First Amended and Restated Investor Rights Agreement by and among the registered owner of this certificate, the Company and certain other stockholders of the Company, a copy of which is available for inspection at the offices of the Secretary of the Company." 4. Transfers of Voting Rights. Any transferee to whom Voting Shares are -------------------------- transferred by an Investor or Management Stockholder, whether voluntarily or by operation of law, shall be bound by the voting obligations imposed upon the transferor under this Agreement, and shall be entitled to the rights granted to the transferor under this Agreement, to the same extent as if such transferee were an Investor or Management Stockholder hereunder. ARTICLE III. REGISTRATION RIGHTS 1. Required Registrations. ---------------------- (a) At any time beginning 180 days after the closing of the Company's first underwritten public offering of shares of Common Stock pursuant to a Registration Statement, a -3- Stockholder or Stockholders holding in the aggregate at least 35% of the Registrable Shares may request, in writing, that the Company effect the registration on Form S-1 or Form S-2 (or any successor form) of Registrable Shares owned by such Stockholder having an aggregate offering price of at least $5,000,000 (based on the then current market price). If the Stockholder or Stockholders initiating the registration intend(s) to distribute the Registrable Shares by means of an underwriting, such Stockholder or Stockholders shall so advise the Company in its request. In the event such registration is underwritten, the right of other Stockholders to participate in such registration shall be conditioned on such Stockholders' participation in such underwriting. Upon receipt of any such request, the Company shall promptly give written notice of such proposed registration to all other Stockholders. Such Stockholders shall have the right, by giving written notice to the Company within 30 days after the Company provides its notice, to elect to have included in such registration such of their Registrable Shares as such Stockholders may request in such notice of election; provided that if the underwriter (if any) managing the offering determines that, because of marketing factors, all of the Registrable Shares requested to be registered by all Stockholders may not be included in the offering, then all Stockholders who have requested registration shall participate in the registration pro rata based upon the number of Registrable Shares which they have requested to be so registered. Thereupon, the Company shall, as expeditiously as possible, use its reasonable best efforts to effect the registration on Form S-1 or Form S-2 (or any successor form) of all Registrable Shares which the Company has been requested to so register. (b) At any time after the Company becomes eligible to file a Registration Statement on Form S-3 (or any successor form relating to secondary offerings), a Stockholder or Stockholders may request the Company, in writing, to effect the registration on Form S-3 (or such successor form), of Registrable Shares having an aggregate offering price of at least $1,000,000 (based on the then current public market price). Upon receipt of any such request, the Company shall promptly give written notice of such proposed registration to all other Stockholders. Such Stockholders shall have the right, by giving written notice to the Company within 30 days after the Company provides its notice, to elect to have included in such registration such of their Registrable Shares as such Stockholders may request in such notice of election; provided that if the underwriter (if any) managing the offering determines that, because of marketing factors, all of the Registrable Shares requested to be registered by all Stockholders may not be included in the offering, then all Stockholders who have requested registration shall participate in the registration pro rata based upon the number of Registrable Shares which they have requested to be so registered. Thereupon, the Company shall, as expeditiously as possible, use its reasonable best efforts to effect the registration on Form S-3 (or such successor form) of all Registrable Shares which the Company has been requested to so register. (c) The Company shall not be required to effect more than two registrations pursuant to paragraph (a) above; provided, however, that such -------- ------- obligation shall be deemed satisfied only when a registration statement covering the applicable Registrable Shares shall have (i) become effective and, if such method of disposition is a firm commitment underwritten public offering, all such Registrable Shares have been sold pursuant thereto, or (ii) been withdrawn at the request of the Stockholders requesting such registration (other than as a result of information concerning the business or financial condition of the Company which is made known to the Stockholders after the date on which such registration was requested). There shall be no limit on the number of registrations which may be requested pursuant to paragraph (b) above. In addition, -4- the Company shall not be required to effect any registration (other than on Form S-3 or any successor form relating to secondary offerings) within six months after the effective date of any other Registration Statement on Form S-1 of the Company. (d) If at the time of any request to register Registrable Shares pursuant to this Section 1, the Company is engaged or has plans to engage within 90 days of the time of the request in a registered public offering of securities for its own account or is engaged in any other activity which, in the good faith determination of the Company's Board of Directors, would be adversely affected by the requested registration to the material detriment of the Company, then the Company may at its option direct that such request be delayed for a period not in excess of six months from the effective date of such offering or the date of commencement of such other material activity, as the case may be, such right to delay a request to be exercised by the Company not more than once in any 12- month period. 2. Incidental Registration. ----------------------- (a) Whenever the Company proposes to file a Registration Statement at any time and from time to time, whether at the request of any Stockholder or otherwise (other than a Registration Statement filed in connection with the Company's initial public offering of Common Stock), it will, prior to such filing, give written notice to all Stockholders and all Management Stockholders of its intention to do so and, upon the written request of a Stockholder or Stockholders, or a Management Stockholder or Management Stockholders, given within 30 days after the Company provides such notice (which request shall state the intended method of disposition of such Registrable Shares), the Company shall use its reasonable best efforts to cause all Registrable Shares which the Company has been requested by such Stockholder or Stockholders, or Management Stockholder or Management Stockholders, to register to be registered under the Securities Act to the extent necessary to permit their sale or other disposition in accordance with the intended methods of distribution specified in the request of such Stockholder or Stockholders, or Management Stockholder or Management Stockholders; provided, however, that the Company shall have the right to -------- ------- postpone or withdraw any registration effected pursuant to this Section 2 without obligation to any Stockholder or Management Stockholder. (b) In connection with any registration under this Section 2 involving an underwriting, the Company shall not be required to include any Registrable Shares in such registration unless the holders thereof accept the terms of the underwriting as agreed upon between the Company and the underwriters selected by it. If in the opinion of the managing underwriter it is desirable because of marketing factors to limit the number of Registrable Shares to be included in the offering, then the Company shall be required to include in the registration only that number of Registrable Shares, if any, which the managing underwriter believes should be included therein; provided, however, that no persons or -------- ------- entities other than the Company, the Stockholders, the Management Stockholders and other persons or entities holding registration rights shall be permitted to include securities in the offering. If the number of Registrable Shares to be included in the offering in accordance with the foregoing is less than the total number of shares which the holders of Registrable Shares have requested to be included, then the holders of Registrable Shares who have requested registration and other holders of securities entitled to include them in such registration shall participate in the registration pro rata based upon their -5- total ownership of shares of Common Stock (giving effect to the conversion into Common Stock of all securities convertible thereinto); provided, however, that -------- ------- if the Registration Statement is filed by the Company upon the exercise of demand registration rights held by stockholders other than holders of Registrable Shares ("Other Holders") and does not include shares to be sold for the account of the Company, then the Other Holders shall be entitled to include all of the shares requested by them to be included in such Registration Statement before holders of Registrable Shares shall be entitled to include Registrable Shares therein. If any holder would thus be entitled to include more securities than such holder requested to be registered, the excess shall be allocated among other requesting holders pro rata in the manner described in the preceding sentence. 3. Registration Procedures. If and whenever the Company is required by the ----------------------- provisions of this Agreement to use its reasonable best efforts to effect the registration of any of the Registrable Shares under the Securities Act, the Company shall: (a) File with the Commission a Registration Statement with respect to such Registrable Shares and use its reasonable best efforts to cause that Registration Statement to become and remain effective; (b) As expeditiously as possible prepare and file with the Commission any amendments and supplements to the Registration Statement and the prospectus included in the Registration Statement as may be necessary to keep the Registration Statement effective, in the case of a firm commitment underwritten public offering, until each underwriter has completed the distribution of all securities purchased by it, and, in the case of any other offering, until the earlier of the sale of all Registrable Shares covered thereby or 120 days after the effective date thereof; (c) As expeditiously as possible furnish to each selling Stockholder or Management Stockholder such reasonable numbers of copies of the prospectus, including a preliminary prospectus, in conformity with the requirements of the Securities Act, and such other documents as the selling Stockholder or Management Stockholder may reasonably request in order to facilitate the public sale or other disposition of the Registrable Shares owned by the selling Stockholder or Management Stockholder; and (d) As expeditiously as possible use its best efforts to register or qualify the Registrable Shares covered by the Registration Statement under the securities or Blue Sky laws of such states as the selling Stockholder or Management Stockholder shall reasonably request, and do any and all other acts and things that may be necessary or desirable to enable the selling Stockholder or Management Stockholder to consummate the public sale or other disposition in such states of the Registrable Shares owned by the selling Stockholder or Management Stockholder; provided, however, that the Company shall not be -------- ------- required in connection with this paragraph (d) to qualify as a foreign corporation or execute a general consent to service of process in any jurisdiction. (e) Use its best efforts to have the Registrable Shares listed, subject to notice, on the NASDAQ National Market or other applicable exchange. -6- If the Company has delivered preliminary or final prospectuses to the selling Stockholders or Management Stockholders and after having done so the prospectus is amended to comply with the requirements of the Securities Act, the Company shall promptly notify the selling Stockholders or Management Stockholders and, if requested, the selling Stockholders or Management Stockholders shall immediately cease making offers of Registrable Shares and return all prospectuses to the Company. The Company shall promptly provide each selling Stockholder and Management Stockholder with revised prospectuses and, following receipt of the revised prospectuses, the selling Stockholder or Management Stockholder shall be free to resume making offers of the Registrable Shares. Notwithstanding the foregoing, each selling Stockholder and Management Stockholder shall cease making offers or sales pursuant to a Registration Statement during any period (not to exceed 90 days in any 12-month period) in which the Company determines, by notice to each selling Stockholder and Management Stockholder, that it is in possession of material non-public information. 4. Allocation of Expenses. The Company will pay all Registration Expenses ---------------------- of all registrations under this Agreement; provided, however, that if a -------- ------- registration under Section 1 of Article III is withdrawn at the request of the Stockholders requesting such registration (other than as a result of information concerning the business or financial condition of the Company which is made known to the Stockholders after the date on which such registration was requested) and if the requesting Stockholders elect not to have such registration counted as a registration requested under Article III, Section 1, the requesting Stockholders shall pay the Registration Expenses of such registration pro rata in accordance with the number of their Registrable Shares included in such registration. For purposes of this Section 4, the term "Registration Expenses" shall mean all expenses incurred by the Company in complying with Article III, Section 1, including, without limitation, all registration and filing fees, exchange listing fees, printing expenses, fees and expenses of counsel for the Company and the fees and expenses of one counsel selected by the selling Stockholder(s) to represent the selling Stockholder(s), state Blue Sky fees and expenses, and the expense of any special audits incident to or required by any such registration, but excluding underwriting discounts, selling commissions and the fees and expenses of selling Stockholders' and Management Stockholders' own counsel (other than the counsel selected to represent all selling Stockholder(s)). 5. Indemnification and Contribution. -------------------------------- (a) In the event of any registration of any of the Registrable Shares under the Securities Act pursuant to this Agreement, the Company will indemnify and hold harmless the seller of such Registrable Shares, each underwriter of such Registrable Shares, and each other person, if any, who controls such seller or underwriter within the meaning of the Securities Act or the Exchange Act against any losses, claims, damages or liabilities, joint or several, to which such seller, underwriter or controlling person may become subject under the Securities Act, the Exchange Act, state securities or Blue Sky laws or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon any untrue statement or alleged untrue statement of any material fact contained in any Registration Statement under which such Registrable Shares were registered under the Securities Act, any preliminary prospectus or final prospectus contained in the Registration Statement, or any -7- amendment or supplement to such Registration Statement, or arise out of or are based upon the omission or alleged omission to state a material fact required to be stated therein or necessary to make the statements therein not misleading; and the Company will reimburse such seller, underwriter and each such controlling person for any legal or any other expenses reasonably incurred by such seller, underwriter or controlling person in connection with investigating or defending any such loss, claim, damage, liability or action; provided, -------- however, that the Company will not be liable in any such case to the extent that - ------- any such loss, claim, damage or liability arises out of or is based upon any untrue statement or omission made in such Registration Statement, preliminary prospectus or final prospectus, or any such amendment or supplement, in reliance upon and in conformity with information furnished to the Company, in writing, by or on behalf of such seller, underwriter or controlling person specifically for use in the preparation thereof. (b) In the event of any registration of any of the Registrable Shares under the Securities Act pursuant to this Agreement, each seller of Registrable Shares, severally and not jointly, will indemnify and hold harmless the Company, each of its directors and officers and each underwriter (if any) and each person, if any, who controls the Company or any such underwriter within the meaning of the Securities Act or the Exchange Act, against any losses, claims, damages or liabilities, joint or several, to which the Company, such directors and officers, underwriter or controlling person may become subject under the Securities Act, Exchange Act, state securities or Blue Sky laws or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon any untrue statement or alleged untrue statement of a material fact contained in any Registration Statement under which such Registrable Shares were registered under the Securities Act, any preliminary prospectus or final prospectus contained in the Registration Statement, or any amendment or supplement to the Registration Statement, or arise out of or are based upon any omission or alleged omission to state a material fact required to be stated therein or necessary to make the statements therein not misleading, if the statement or omission was made in reliance upon and in conformity with information relating to such seller furnished in writing to the Company by or on behalf of such seller specifically for use in connection with the preparation of such Registration Statement, prospectus, amendment or supplement; provided, however, that the obligations of such Stockholders -------- ------- hereunder shall be limited to an amount equal to the proceeds to each Stockholder of Registrable Shares sold in connection with such registration. (c) Each party entitled to indemnification under this Article III, Section 5 (the "Indemnified Party") shall give notice to the party required to provide indemnification (the "Indemnifying Party") promptly after such Indemnified Party has actual knowledge of any claim as to which indemnity may be sought, and shall permit the Indemnifying Party to assume the defense of any such claim or any litigation resulting therefrom; provided, that counsel for the -------- Indemnifying Party, who shall conduct the defense of such claim or litigation, shall be approved by the Indemnified Party (whose approval shall not be unreasonably withheld); and, provided, further, that the failure of any -------- ------- Indemnified Party to give notice as provided herein shall not relieve the Indemnifying Party of its obligations under this Article III, Section 5. The Indemnified Party may participate in such defense at such party's expense; provided however that the Indemnifying Party shall pay such expense if representation of such Indemnified Party by the counsel retained by the Indemnifying Party would be inappropriate due to actual or potential differing interests between the Indemnified Party and any other party represented by -8- such counsel in such proceeding. No Indemnifying Party, in the defense of any such claim or litigation shall, except with the consent of each Indemnified Party, consent to entry of any judgment or enter into any settlement which does not include as an unconditional term thereof the giving by the claimant or plaintiff to such Indemnified Party of a release from all liability in respect of such claim or litigation, and no Indemnified Party shall consent to entry of any judgment or settle such claim or litigation without the prior written consent of the Indemnifying Party. (d) In order to provide for just and equitable contribution to joint liability under the Securities Act in any case in which either (i) any holder of Registrable Shares exercising rights under this Agreement, or any controlling person of any such holder, makes a claim for indemnification pursuant to this Article III, Section 5 but it is judicially determined (by the entry of a final judgment or decree by a court of competent jurisdiction and the expiration of time to appeal or the denial of the last right of appeal) that such indemnification may not be enforced in such case notwithstanding the fact that this Article III, Section 5 provides for indemnification in such case, or (ii) contribution under the Securities Act may be required on the part of any such selling Stockholder or any such controlling person in circumstances for which indemnification is provided under this Article III, Section 5; then, in each such case, the Company and such Stockholder will contribute to the aggregate losses, claims, damages or liabilities to which they may be subject (after contribution from others) in such proportions so that such holder is responsible for the portion represented by the percentage that the public offering price of its Registrable Shares offered by the Registration Statement bears to the public offering price of all securities offered by such Registration Statement, and the Company is responsible for the remaining portion; provided, however, that, in -------- ------- any such case, (A) no such holder will be required to contribute any amount in excess of the proceeds to it of all Registrable Shares sold by it pursuant to such Registration Statement, and (B) no person or entity guilty of fraudulent misrepresentation, within the meaning of Section 11(f) of the Securities Act, shall be entitled to contribution from any person or entity who is not guilty of such fraudulent misrepresentation. 6. Indemnification with Respect to Underwritten Offering. In the event ----------------------------------------------------- that Registrable Shares are sold pursuant to a Registration Statement in an underwritten offering pursuant to Article III, Section 1, the Company agrees to enter into an underwriting agreement containing customary representations and warranties with respect to the business and operations of an issuer of the securities being registered and customary covenants and agreements to be performed by such issuer, including without limitation customary provisions with respect to indemnification by the Company of the underwriters of such offering. 7. Information by Holder. Each Stockholder and Management Stockholder --------------------- including Registrable Shares in any registration shall furnish to the Company such information regarding such Stockholder or Management Stockholder and the distribution proposed by such Stockholder or Management Stockholder as the Company may reasonably request in writing and as shall be required in connection with any registration, qualification or compliance referred to in this Agreement. 8. "Stand-Off" Agreement. Except with respect to transfers permitted by -------------------- Section 7.2(2) of the Purchase Agreement where the transferee agrees in writing to be subject to the -9- terms and conditions of any lock-up agreement to which the transferor is a party relating to the securities of the Company being transferred, each Stockholder and Management Stockholder, if requested by the Company and the managing underwriter of an offering by the Company of Common Stock or other securities of the Company pursuant to a Registration Statement, shall agree not to sell publicly or otherwise transfer or dispose of any Registrable Shares or other securities of the Company held by such Stockholder for a specified period of time (not to exceed 180 days) following the effective date of such Registration Statement; provided that: (a) such agreement shall only apply to the first Registration Statement covering Common Stock to be sold on its behalf to the public in an underwritten offering; (b) all officers and directors of the Company and all holders of at least 5% of the Company's capital stock enter into similar agreements; and (c) the Company and the managing underwriter shall agree not to release (other than early releases granted to parties other than officers and directors of the Company, in an aggregate amount not to exceed 100,000 shares of Common Stock) any of the parties listed in subparagraph (b) above prior to the grant of a proportional release to the Stockholders. 9. Limitations on Subsequent Registration Rights. The Company shall not, --------------------------------------------- without the prior written consent of Stockholders holding at least 67% of the Registrable Shares held by all Stockholders, enter into any agreement (other than this Agreement) with any holder or prospective holder of any securities of the Company which would allow such holder or prospective holder to include securities of the Company in any Registration Statement, unless under the terms of such agreement, such holder or prospective holder may include such securities in any such registration only on terms substantially similar to the terms on which holders of Registrable Shares may include shares in such registration. 10. Rule 144 Requirements. After the earliest of (a) the closing of the --------------------- sale of securities of the Company pursuant to a Registration Statement, (b) the registration by the Company of a class of securities under Section 12 of the Exchange Act, or (c) the issuance by the Company of an offering circular pursuant to Regulation A under the Securities Act, the Company agrees to: (i) Comply with the requirements of Rule 144(c) under the Securities Act with respect to current public information about the Company; (ii) Use its best efforts to file with the Commission in a timely manner all reports and other documents required of the Company under the Securities Act and the Exchange Act (at any time after it has become subject to such reporting requirements); and (iii) Furnish to any holder of Registrable Shares upon request (A) a written statement by the Company as to its compliance with the requirements of said Rule 144(c), and the reporting requirements of the Securities Act and the Exchange Act (at any time after it has become subject to such reporting requirements), (B) a copy of the most recent annual or quarterly report of the Company, and (C) such other reports and documents of the Company as such holder may reasonably request to avail itself of any similar rule or regulation of the Commission allowing it to sell any such securities without registration. -10- ARTICLE IV. RIGHT OF FIRST REFUSAL 1. Right of First Refusal ---------------------- (a) The Company shall not issue, sell or exchange, agree to issue, sell or exchange, or reserve or set aside for issuance, sale or exchange, (i) any shares of its Common Stock, (ii) any other equity securities of the Company, including, without limitation, shares of preferred stock, (iii) any option, warrant or other right to subscribe for, purchase or otherwise acquire any equity securities of the Company, or (iv) any debt securities convertible into capital stock of the Company (collectively, the "Offered Securities"), unless in each such case the Company shall have first complied with Article IV of this Agreement. The Company shall deliver to the Stockholders a written notice of any proposed or intended issuance, sale or exchange of Offered Securities (the "Offer"), which Offer shall (i) identify and describe the Offered Securities, (ii) describe the price and other terms upon which they are to be issued, sold or exchanged, and the number or amount of the Offered Securities to be issued, sold or exchanged, (iii) identify the persons or entities, if known, to which or with which the Offered Securities are to be offered, issued, sold or exchanged, and (iv) offer to issue and sell to or exchange with each of the Stockholders (A) such portion of the Offered Securities as the aggregate number of Shares (including shares of Common Stock issuable upon conversion of the Shares even if such conversion has not yet been effected) then held by such Stockholder bears to the total number of shares of Common Stock then outstanding (including shares of Common Stock issuable upon conversion of convertible securities even if such conversion has not yet been effected) (the "Basic Amount"), and (B) such additional portion of the Offered Securities as such Stockholder indicates it will purchase or acquire should other Stockholders acquire less than all of the Offered Securities initially offered to the other Stockholders (the "Undersubscription Amount"). Each Stockholder shall have the right, for a period of 30 days following delivery of the Offer, to purchase or acquire, at the price and upon the other terms specified in the Offer, the number or amount of Offered Securities described above. The Offer by its term shall remain open and irrevocable for such 30-day period. (b) To accept an Offer, in whole or in part, a Stockholder must deliver a written notice to the Company prior to the end of the 30-day period of the Offer, setting forth the portion of the Stockholder's Basic Amount that such Stockholder elects to purchase and, if such Stockholder shall elect to purchase all of its Basic Amount, the Undersubscription Amount (if any) that such Stockholder elects to purchase (the "Notice of Acceptance"). If the Basic Amounts subscribed for by all Stockholders are less than the total Offered Securities, then each Stockholder who has set forth Undersubscription Amounts in its Notice of Acceptance shall be entitled to purchase, in addition to the Basic Amounts subscribed for, all Undersubscription Amounts it has subscribed for; provided, however, that should the Undersubscription Amounts subscribed for - -------- ------- exceed the difference between the Offered Securities and the Basic Amounts subscribed for (the "Available Undersubscription Amount"), each Stockholder who has subscribed for any Undersubscription Amount shall be entitled to purchase only that portion of the Available Undersubscription Amount as the Undersubscription Amount subscribed for by such Stockholder bears to the total Undersubscription Amounts subscribed for by all Stockholders, subject to rounding by the Board of Directors to the extent it reasonably deems necessary. -11- (c) To the extent that Notices of Acceptance are not given by the Stockholders in respect of all the Offered Securities, the Company shall have 90 days from the expiration of the period set forth in Article IV, Section 1(a) to issue, sell or exchange all or any part of such Offered Securities as to which a Notice of Acceptance has not been given by the Stockholders (the "Refused Securities"), but only to the offerees or purchasers described in the Offer and only upon terms and conditions (including, without limitation, unit prices and interest rates) which are not more favorable, in the aggregate, to the acquiring person or persons or less favorable to the Company than those set forth in the Offer. (d) In the event the Company shall propose to sell less than all the Refused Securities (any such sale to be in the manner and on the terms specified in Article IV, Section 1(c)), then each Stockholder may, at its sole option and in its sole discretion, reduce the number or amount of the Offered Securities specified in its Notice of Acceptance to an amount that shall be not less than the number or amount of the Offered Securities that the Stockholder elected to purchase pursuant to Article IV, Section 1(b) multiplied by a fraction, (i) the numerator of which shall be the number or amount of Offered Securities the Company actually proposes to issue, sell or exchange (including Offered Securities to be issued or sold to Stockholders pursuant to Article IV, Section 1(b) prior to such reduction) and (ii) the denominator of which shall be the amount of all Offered Securities. In the event that any Stockholder so elects to reduce the number or amount of Offered Securities specified in its Notice of Acceptance, the Company may not issue, sell or exchange more than the reduced number or amount of the Offered Securities unless and until such securities have again been offered to the Stockholders in accordance with Article IV, Section 1(a). (e) Upon the closing of the issuance, sale or exchange of all or less than all the Refused Securities, the Stockholders shall acquire from the Company, and the Company shall issue to the Stockholders, the number or amount of Offered Securities specified in the Notices of Acceptance, as reduced pursuant to Article IV, Section 1(d) if the Stockholders have so elected, upon the terms and conditions specified in the Offer. The purchase by the Stockholders of any Offered Securities is subject in all cases to the preparation, execution and delivery by the Company and the Stockholders of a purchase agreement relating to such Offered Securities reasonably satisfactory in form and substance to the Stockholders and their respective counsel. (f) Any Offered Securities not acquired by the Stockholders or other persons in accordance with Article IV, Section 1 may not be issued, sold or exchanged until they are again offered to the Stockholders under the procedures specified in this Article. 2. Excluded Issuances. The rights of the Stockholders under this Article ------------------ IV shall not apply to: (a) Common Stock issued as a stock dividend to holders of Common Stock or upon any subdivision or combination of shares of Common Stock; (b) The issuance of the Shares and any shares of Common Stock issued upon conversion thereof; -12- (c) Shares of Common Stock, or options exercisable therefor, issuable to officers, directors, consultants and employees of the Company or any subsidiary pursuant to any plan, agreement or arrangement approved by a vote of the Board of Directors of the Company or the Compensation Committee of the Board of Directors; (d) Securities issued solely in consideration for the acquisition (whether by merger or otherwise) by the Company or any of its subsidiaries of all or substantially all of the stock or assets of any other entity; (e) Shares of Common Stock sold by the Company in an underwritten public offering pursuant to an effective registration statement under the Securities Act; or (f) Up to 1,000,000 shares of Common Stock issued by the Company, with the approval of a majority of the Board of Directors, in connection with lease financings, strategic alliances and similar arrangements. ARTICLE V. GENERAL 1. Termination. Article II of this Agrement shall terminate on the ----------- earlier of (a) the tenth anniversary of the date of this Agreement or (b) the closing of an Initial Public Offering. All of the Company's obligations to register Registrable Shares under Article III of this Agreement shall terminate on the tenth anniversary of the Initial Public Offering. Article IV of this Agreement shall terminate upon the earlier of (a) the sale of all or substantially all of the assets or business of the Company, by merger, sale of assets or otherwise, or (b) the closing of an Initial Public Offering. 2. Transfer of Rights. This Agreement, and the rights and obligations of ------------------ the Stockholders and Management Stockholders hereunder, may be assigned by the Stockholders and Management Stockholders to any person or entity to which Shares are transferred by the Stockholders or Management Stockholders, and such transferee shall be deemed a "Stockholder" or "Management Stockholder" for purposes of this Agreement; provided that (i) the transferee provides written notice of such assignment to the Company and (ii) no assignee shall be a customer or competitor of the Company unless the Board of Directors of the Company otherwise agrees. 3. Severability. The provisions of this Agreement are severable, so that ------------ the invalidity or unenforceability of any provision of this Agreement shall not affect the validity or enforceability of any other term or provision of this Agreement, which shall remain in full force and effect. 4. Specific Performance. In addition to any and all other remedies that -------------------- may be available at law in the event of any breach of this Agreement, the Stockholders shall be entitled to specific performance of the agreements and obligations of the Company and the Stockholders hereunder and to such other injunctive or other equitable relief as may be granted by a court of competent jurisdiction. -13- 5. Governing Law. This Agreement shall be governed by, and construed and ------------- enforced in accordance with, the laws of the State of Delaware (without reference to the conflicts of law provisions thereof). 6. Notices. All notices, requests, consents, and other communications ------- under this Agreement shall be in writing and shall be delivered by hand or mailed by first class certified or registered mail, return receipt requested, postage prepaid: If to the Company, at Convergent Networks, Inc., 900 Chelmsford Street, Tower 3, Lowell, Massachusetts 01851, Attention: President, or at such other address or addresses as may have been furnished in writing by the Company to the Purchasers, with a copy to Hale and Dorr LLP, 60 State Street, Boston, Massachusetts 02109, Attention: John A. Burgess, Esq.; If to an Investor, at his or its address as set forth on Attachment A or ------------ Attachment B, or at such other address or addresses as may have been furnished - ------------ to the Company in writing by such Investor; or If to a Management Stockholder, at his address set forth below his signature to this Agreement. Notices provided in accordance with this Article V, Section 6 shall be deemed delivered upon personal delivery or two business days after deposit in the mail. 7. Complete Agreement; Amendments. This Agreement constitutes the full ------------------------------ and complete agreement of the parties hereto with respect to the subject matter hereof. This Agreement may be amended and any provision may be waived, prospectively or retroactively, at any time by a written instrument signed by the Company and Stockholders holding at least 67% of the Registrable Shares then held by all Stockholders. No waivers of or exceptions to any term, condition or provision of this Agreement, in any one or more instances, shall be deemed to be, or construed as, a further or continuing waiver of any such term, condition or provision. 8. Pronouns. Whenever the content may require, any pronouns used in this -------- Agreement shall include the corresponding masculine, feminine or neuter forms, and the singular form of nouns and pronouns shall include the plural, and vice versa. 9. Counterparts. This Agreement may be executed in any number of ------------ counterparts, each of which shall be deemed to be an original, and all of which together shall constitute one Agreement binding on all the parties hereto. 10. Captions. Captions of sections have been added only for convenience -------- and shall not be deemed to be a part of this Agreement. 11. Addition of Investors. Each purchaser of shares of Series A Preferred --------------------- Stock, Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock of the Company under the respective Stock Purchase Agreement shall become a party to, and an "Investor" under, this Agreement upon the closing of its purchase of its respective shares thereunder and its execution of a counterpart signature page to this Agreement. -14- 12. Cancellation of Original Agreement. This Agreement replaces the ---------------------------------- Original Agreement, as amended to date, in its entirety, and such Original Agreement shall hereafter be null and void. 13. Aggregation of Stock. All shares of Series D Preferred Stock and -------------------- Common Stock held or acquired by affiliated entities or persons shall be aggregated for the purpose of determining the availability of any rights under this Agreement. -15- Attachment A Existing Investors ------------------ Matrix Partners V, L.P. 1000 Winter Street Waltham, MA 02451 Attn: David Schantz Fax: 781-890-2288 Matrix V Entrepreneurs Fund L.P. 1000 Winter Street Waltham, MA 02451 Attn: David Schantz Fax: 781-890-2288 Battery Ventures IV, L.P. 20 William Street, Suite 200 Wellesley Office Park Wellesley, MA 02481 Attn: Todd Dagres Fax: 781-577-1001 Battery Investment Partners IV, L.L.C. 20 William Street, Suite 200 Wellesley Office Park Wellesley, MA 02481 Attn: Todd Dagres Fax: 781-577-1001 North Bridge Venture Partners II, L.P. 950 Winter Street Suite 4600 Waltham, MA 02451 Attn: Ed Hamilton Fax: 781-290-0999 Worldview Technology Partners III, L.P. 435 Tasso Street, Suite 120 Palo Alto, CA 94301 Attn: John Boyle Fax: 650-322-3880 Worldview Technology International III, L.P. 435 Tasso Street, Suite 120 Palo Alto, CA 94301 Attn: John Boyle Fax: 650-322-3880 Worldview Strategic Partners III, L.P. 435 Tasso Street, Suite 120 Palo Alto, CA 94301 Attn: John Boyle Fax: 650.322.3880 VantagePoint Communications Partners, L.P. 1001 Bayhill Drive Suite 100 San Bruno, CA 94066 VantagePoint Venture Partners III (Q), L.P. 1001 Bayhill Drive Suite 100 San Bruno, CA 94066 VantagePoint Venture Partner III, L.P. 1001 Bayhill Drive Suite 100 San Bruno, CA 94066 B.A.B.P., L.L.C. c/o GLOBAL NAPs, Inc. 10 Merrymount Road Quincy, MA 02169 Attn: Frank Gangi Tel: 617.507.5100 Fax: 617.507.5200 Anthony Medaglia c/o Hutchins, Wheeler & Dittmar 101 Federal Street Boston, MA 02110 Fax: 617.951.1295 Cheng Wu 303 Kimball Road Carlisle, MA 01741 Mahesh Ganmukhi 1286 Curve Street Carlisle, MA 01742 Seamus Gilchrist 13 Tedington Way Mt. Laurel, NJ 08054 Gregor Ferguson 153 Simon Willard Road Concord, MA 01742 McQuillan Consulting Self/Employed Profit Sharing Retirement Plan John M. McQuillan, Trustee 1620 Sudbury Road #4 Concord, MA 01742 Bing Yang c/o Convergent Networks, Inc. 900 Chelmsford Street Tower Three Lowell, MA 01851 Hwang-Ruey Wang c/o Convergent Networks, Inc. 900 Chelmsford Street Tower Three Lowell, MA 01851 Jennifer Pigg c/o The Yankee Group 31 St. James Avenue Boston, MA 02116 Yongdong Zhao 11108 Readville Lane Austin, TX 78739 Karl May 281 Blue Ridge Road North Andover, MA 01845 Cheng Wu 303 Kimball Road Carlisle, MA 01741 Jeffrey McCarthy 171 Pope Road Acton, MA 01720 Dennis Rainville 50 Swanson Road Carlisle, MA 01741 Pamela F. Lenehan c/o Convergent Networks, Inc. 900 Chelmsford Street Tower Three Lowell, MA 01851 Attachment B New Investors ------------- PUTNAM OTC AND EMERGING GROWTH FUND PUTNAM FUNDS TRUST-PUTNAM EQUITY FUND 2000 PUTNAM FUNDS TRUST-PUTNAM TECHNOLOGY FUND c/o Putnam Investments One Post Office Square Boston, MA 02110 Attn: General Counsel PUTNAM WORLD TRUST II-PUTNAM EMERGING INFORMATION SCIENCES FUND c/o Putnam Investments One Post Office Square Boston, MA 02110 Attn: General Counsel Pilgrim Baxter Hybrid Partners I, L.P. 825 DuPortail Road 6 Wayne, PA 19087 Attn: Matthew DiClemente Fax: 610-722-5840 Pilgrim Baxter Hybrid Partners II, L.P. 825 DuPortail Road 6 Wayne, PA 19087 Attn: Matthew DiClemente Fax: 610-722-5840 Kemper Small Capitalization Equity Fund, Snorklebay & Co. Chapman and Cutler 111 West Monroe Street Chicago, IL 60603 Attn: Anthony D. Yager Tel: 312-845-3731 Kemper Variable Series - Small Capitalization Growth Portfolio- Snailsand & Co. Chapman and Cutler 111 West Monroe Street Chicago, IL 60603 Attn: Anthony D. Yager Tel: 312-845-3731