X0306 4 2015-04-29 1 0001361470 MAVENIR SYSTEMS INC MVNR 0001547399 August Capital Management V, L.L.C. C/O AUGUST CAPITAL 2480 SAND HILL ROAD, SUITE 101 MENLO PARK CA 94025 0 0 1 0 0001452199 August Capital V Special Opportunities, L.P. C/O AUGUST CAPITAL 2480 SAND HILL ROAD, SUITE 101 MENLO PARK CA 94025 0 0 1 0 0001464232 August Capital Strategic Partners V, L.P. C/O AUGUST CAPITAL 2480 SAND HILL ROAD, SUITE 101 MENLO PARK CA 94025 0 0 1 0 0001547424 Hartenbaum Howard C/O AUGUST CAPITAL 2480 SAND HILL ROAD, SUITE 101 MENLO PARK CA 94025 0 0 1 0 0001547378 Hornik David C/O AUGUST CAPITAL 2480 SAND HILL ROAD, SUITE 101 MENLO PARK CA 94025 0 0 1 0 0001252521 JOHNSTON JOHN R C/O AUGUST CAPITAL 2480 SAND HILL ROAD, SUITE 101 MENLO PARK CA 94025 0 0 1 0 0001193109 MARQUARDT DAVID F C/O AUGUST CAPITAL 2480 SAND HILL ROAD, SUITE 101 MENLO PARK CA 94025 0 0 1 0 Common Stock 2015-04-29 4 U 0 2903831 17.55 D 0 I See footnotes These shares are being disposed of upon the completion of an exchange offer by Mitel Networks Corporation ("Mitel") and Roadster Subsidiary Corporation to purchase all of the issued and outstanding shares of common stock of the Issuer, pursuant to an Agreement and Plan of Merger dated February 28, 2015 and amended through the date of this form. The tender price per share of the shares of common stock is (i) $17.55 in cash; or (ii) 1.8320 shares of common stock of Mitel, at the election of the holder and subject to proration. Such shares of common stock are held of record by August Capital V Special Opportunities, L.P. ("August V Special Opportunities"), as nominee for August Capital V Special Opportunities, August Capital Strategic Partners V, L.P. ("August Strategic V") and related individuals. August Capital Management V, L.L.C. ("ACM V"), the general partner of August V Special Opportunities and August Strategic V, may be deemed to have sole voting and investment power over the reported shares of the Issuer's common stock. Howard Hartenbaum, David M. Hornik, John R. Johnston, David F. Marquardt and Vivek Mehra, as members of ACM V, share voting and investment power over the reported shares of the Issuer's common stock. August V Special Opportunities, August Strategic V, ACM V and each of its members disclaim beneficial ownership of these shares of the Issuer's common stock except to the extent of any pecuniary interest therein, and the filing of this report is not an admission that August V Special Opportunities, August Strategic V, ACM V or any of its members is the beneficial owner of these shares for purposes of Section 16 or for any other purpose. /s/ Jeffrey Bloom, by power of attorney for August Capital Management V, L.L.C. 2015-04-30 /s/ Jeffrey Bloom, by power of attorney for August Capital Management V, L.L.C., the General Partner of August Capital V Special Opportunities, L.P. 2015-04-30 /s/ Jeffrey Bloom, by power of attorney for Howard Hartenbaum 2015-04-30 /s/ Jeffrey Bloom, by power of attorney for David M. Hornik 2015-04-30 /s/ Jeffrey Bloom, by power of attorney for John R. Johnston 2015-04-30 /s/ Jeffrey Bloom, by power of attorney for David F. Marquardt 2015-04-30