Principal Shareholders PRINCIPAL STOCKHOLDERS The following table sets forth certain information regarding beneficial ownership of our common stock as of January 25, 2000, and as adjusted to reflect the sale of the shares of common stock in this offering, by: - each person known by us to be the beneficial owner of more than 5% of our common stock; - each of our executive officers listed in the Summary Compensation table; - each of our directors; and - all of our executive officers and directors as a group. To our knowledge, each person has sole voting and investment power over the shares shown as beneficially owned except to the extent authority is shared by spouses under applicable law and except as described in the footnotes to the table. The number of shares of common stock owned by each person listed includes shares of common stock underlying options held by that person that are exercisable within 60 days after January 25, 2000. The number of outstanding shares of common stock used in calculating the percentage ownership for each person listed includes the shares of common stock underlying options held by that person that are exercisable within 60 days after January 25, 2000, but excludes shares of common stock underlying options held by any other person. Percentage ownership calculations are based on 29,210,864 shares of common stock outstanding as of January 25, 2000, and the additional shares of common stock to be sold in this offering. PERCENTAGE OF COMMON STOCK OUTSTANDING -------------------- NUMBER OF SHARES BEFORE AFTER NAME OF BENEFICIAL OWNER BENEFICIALLY OWNED OFFERING OFFERING ------------------------ ------------------ -------- -------- North Bridge Venture Partners(1)... 5,585,190 19.12% Matrix Partners(2)................. 7,684,806 26.31 Accel Partners(3).................. 2,428,684 8.31 Chin-Cheng Wu(4)................... 2,581,600 8.84 Louis J. Volpe..................... 1,300,000 4.45 Cynthia M. Deysher(5).............. 371,600 1.27 Christopher P. Lynch(6)............ 400,000 1.37 Peter M. Piscia(7)................. 166,066 * Paul J. Ferri(8)................... 7,684,806 26.31 Edward T. Anderson(9).............. 5,585,190 19.12 James A. Dolce, Jr.(10)............ 68,920 * All executive officers and directors as a group (eight persons).................. 18,158,182 62.11 --------------- * Less than 1%. (1) Composed of 5,303,206 shares held by North Bridge Venture Partners II, L.P., 191,156 shares held by North Bridge Venture Partners IV-A, L.P. and 90,828 shares held by North Bridge Venture Partners IV-B, L.P. The address of North Bridge Venture Partners, L.P. is 950 Winter Street, Suite 4600, Waltham, MA 02451. (2) Composed of 6,931,976 shares held by Matrix Partners IV, L.P., 364,840 shares held by Matrix IV Entrepreneurs Fund, L.P., 333,672 shares held by Matrix Partners VI, L.P. and 54,318 shares held by Weston & Co., as nominee for certain persons. The address of Matrix Partners is Bay Colony Corporate Center, 1000 Winter Street, Suite 4500, Waltham, MA 02154. (3) Composed of 1,906,518 shares held by Accel V L.P., 252,582 shares held by Accel Internet/Strategic Technology Fund L.P., 99,576 shares held by Accel Keiretsu V L.P., 116,578 shares held by Accel Investors '97 L.P. and 53,430 shares held by Ellmore C. Patterson Partners. The address of Accel Partners is One Palmer Square, Princeton, New Jersey 08542. (4) Includes 1,000,000 shares held by the Chin-Cheng Wu 1996 Irrevocable Children's Trust dated December 9, 1996. The address of Chin-Cheng Wu is c/o ArrowPoint Communications, Inc., 50 Nagog Park, Acton, Massachusetts 01720. (5) Includes 16,000 shares held for the benefit of Ms. Deysher's minor children under the Massachusetts Uniform Transfer to Minors Act. (6) Includes 8,000 shares held for the benefit of Mr. Lynch's minor children under the Massachusetts Uniform Transfer to Minors Act. (7) Includes 26,066 shares issuable upon the exercise of options exercisable within 60 days after January 25, 2000. (8) Composed of 6,931,976 shares held by Matrix Partners IV, L.P., 364,840 shares held by Matrix IV Entrepreneurs Fund, L.P., 333,672 shares held by Matrix Partners VI, L.P. and 54,318 shares held by Weston & Co. Mr. Ferri is a general partner of Matrix IV Management Co., L.P., which is a general partner of each of Matrix Partners IV, L.P. and Matrix IV Entrepreneurs Fund, L.P. Mr. Ferri is a member of Matrix VI Management Co., L.L.C., which is the general partner of Matrix Partners VI, L.P. Mr. Ferri is also an authorized signatory for Weston & Co. (9) Composed of 5,303,206 shares held by North Bridge Venture Partners II, L.P., 191,156 held by North Bridge Venture Partners IV-A, L.P. and 90,828 shares held by North Bridge Venture Partners IV-B, L.P. Mr. Anderson is a general partner of North Bridge Venture Management II, L.P., which is the general partner of North Bridge Venture Partners II, L.P. Mr. Anderson is also a general partner of North Bridge Venture Management IV, L.P., which is the general partner of each of North Bridge Venture Partners IV-A, L.P. and North Bridge Venture Partners IV-B, L.P. (10) Composed of 50,000 shares held by the Alexer Family Limited Partnership and 18,920 held by Mr. Dolce. Mr. Dolce is a general partner of the Alexer Family Limited Partnership. |