X0202 4 2004-10-26 0 0001043639 SIGMATEL INC SGTL 0001192451 LAWLER KENNETH P C/O BATTERY VENTURES 20 WILLIAM STREET, SUITE 200 WELLESLEY MA 02481 1 0 0 0 Common Stock 2004-10-26 4 S 0 229700 27.0693 D 502620 I See Footnote Common Stock 2004-10-26 4 S 0 20100 27.0693 D 482520 I See Footnote Common Stock 2004-10-26 4 S 0 5200 27.0693 D 477320 I See Footnote Common Stock 2004-10-27 4 S 0 427900 27.7858 D 49420 I See Footnote Common Stock 2004-10-27 4 S 0 37500 27.7858 D 11920 I See Footnote Common Stock 2004-10-27 4 S 0 9600 27.7858 D 2320 D Sale of shares by Battery Ventures V, L.P. ("BV-V"). The Reporting Person is a managing member of Battery Partners V, LLC, the general partner of BV-V. Sale of shares by Battery Ventures Convergence Fund, L.P. ("Convergence Fund"). The Reporting Person is a managing member of Battery Convergence Partners, LLC, the general partner of Convergence Fund. Sale of shares by Battery Investment Partners V, LLC ("BIP-V"). The reporting person is a member of BIP-V. Includes 2,320 shares held directly by Mr. Lawler with the remainder of shares held by BV-V, Convergence Fund and/or BIP-V. Convergence Fund and BIP-V invest alongside BV-V in all investments made by BV-V and, therefore, the Reporting Person may be deemed to beneficially own the shares held of record by BV-V, Convergence Fund and BIP-V. The Reporting Person disclaims beneficial ownership of shares held by BV-V, Convergence Fund and BIP-V except to the extent of his pecuniary interest therein. /s/ Christopher Hanson, by power of attorney 2004-10-28