X0306 4 2015-04-29 1 0001361470 MAVENIR SYSTEMS INC MVNR 0001589793 Hungle Terry 1700 INTERNATIONAL PARKWAY, SUITE 200 RICHARDSON TX 75081 0 1 0 0 Chief Financial Officer Common Stock 2015-04-29 4 U 0 40000 17.55 D 687 D Common Stock 2015-04-29 4 D 0 687 17.55 D 0 D Stock Option (Right to Buy) 2.10 2015-04-29 4 D 0 68560 15.45 D 2021-12-13 Common Stock 68560 0 D Stock Option (Right to Buy) 2.10 2015-04-29 4 D 0 2981 D 2021-12-13 Common Stock 2981 0 D Stock Option (Right to Buy) 10.00 2015-04-29 4 D 0 17707 7.55 D 2023-11-06 Common Stock 17707 0 D Stock Option (Right to Buy) 10.00 2015-04-29 4 D 0 32293 D 2023-11-06 Common Stock 32293 0 D Stock Option (Right to Buy) 0.56 2015-04-29 4 D 0 41952 16.99 D 2018-04-23 Common Stock 41952 0 D Stock Option (Right to Buy) 0.77 2015-04-29 4 D 0 39285 16.78 D 2020-10-14 Common Stock 39285 0 D Stock Option (Right to Buy) 18.09 2015-04-29 4 D 0 65000 D 2024-03-19 Common Stock 65000 0 D These shares are being disposed of upon the completion of an exchange offer by Mitel Networks Corporation ("Mitel") and Roadster Subsidiary Corporation ("Purchaser") to purchase all of the issued and outstanding shares of common stock of the Issuer (the "Offer"), pursuant to an Agreement and Plan of Merger dated February 28, 2015 and amended through the date of this form (the "Merger Agreement"). The tender price per share of the shares of common stock is (i) $17.55 in cash (the "Cash Consideration"); or (ii) 1.8320 shares of common stock of Mitel (the "Exchange Ratio"), at the election of the holder and subject to proration. Following the completion of the Offer, Purchaser merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Mitel. Reflects 687 shares acquired under the Issuer's 2013 Employee Stock Purchase Plan on April 24, 2015. Represents vested and in-the-money options which, pursuant to the terms of the Merger Agreement as a result of the Merger, have been cancelled and converted into the right to receive, on a per-share basis, the excess of the Cash Consideration over the per-share exercise price, subject to applicable tax withholding. Pursuant to the terms of the Merger Agreement regarding unvested or out-the-money options, this option has been cancelled and converted into an option to purchase 5,461 shares of Mitel common stock for $1.15 per share on substantially equivalent terms using the Exchange Ratio. These options will continue to vest according to their original vesting schedule, with the remaining unvested amount vesting in equal monthly installments until the fourth anniversary of the date of grant, which was ten years prior to the expiration date set forth in Table II. Pursuant to the terms of the Merger Agreement regarding unvested or out-the-money options, this option has been cancelled and converted into an option to purchase 59,160 shares of Mitel common stock for $5.46 per share on substantially equivalent terms using the Exchange Ratio. These options will continue to vest according to their original vesting schedule, with the remaining unvested amount vesting in equal monthly installments until the fourth anniversary of the date of grant, which was ten years prior to the expiration date set forth in Table II. Pursuant to the terms of the Merger Agreement regarding unvested or out-the-money options, this option has been cancelled and converted into an option to purchase 119,080 shares of Mitel common stock for $9.88 per share on substantially equivalent terms using the Exchange Ratio. These options will continue to vest according to their original vesting schedule, with the remaining unvested amount vesting in equal monthly installments until the fourth anniversary of the date of grant, which was ten years prior to the expiration date set forth in Table II. /s/ Terry Hungle 2015-05-01