X0306 4 2016-02-02 0 0001024657 WEST CORP WSTC 0001372335 Treinen David WEST CORPORATION 11808 MIRACLE HILLS DRIVE OMAHA NE 68154 0 1 0 0 EVP-Corp Dev & Planning Common Stock 2016-02-02 4 M 0 1599.2058 19.52 A 94497.2058 D Common Stock 2016-02-02 4 F 0 479.7617 19.52 D 94017.444 D Common Stock 2016-02-02 4 D 0 0.444 19.52 D 94017 D Common Stock 2016-02-02 4 M 0 10337.012 19.52 A 104354.012 D Common Stock 2016-02-02 4 F 0 3101.1036 19.52 D 101252.9084 D Common Stock 2016-02-02 4 D 0 0.9084 19.52 D 101252 D Common Stock 80181 I By David J. Treinen Revocable Trust Stock Units 2016-02-02 4 M 0 1599.2058 D Common Stock 1599.2058 149983.635 D Stock Units 2016-02-02 4 M 0 10337.012 D Common Stock 10337.012 139646.623 D Shares were issued as a distribution in respect of stock units granted under the Issuer's Nonqualified Deferred Compensation Plan. Reflects 479.7617 shares withheld by the Issuer at the market price of $19.52 per share for the required withholding taxes associated with the distribution of shares of the Issuer's Common Stock pursuant to the Issuer's Nonqualified Deferred Compensation Plan. Reflects cash paid in lieu of fractional share. Reflects 3101.1036 shares withheld by the Issuer at the market price of $19.52 per share for the required withholding taxes associated with the distribution of shares of the Issuer's Common Stock pursuant to the Issuer's Nonqualified Deferred Compensation Plan. Stock units represent notional equity interests in the Issuer credited to the reporting person's deferred compensation account. Each stock unit is the economic equivalent of one share of the Issuer's Common Stock. These stock units become payable, through the issuance of shares of the Issuer's Common Stock (or the cash equivalent thereof), on the date specified by the reporting person, which can be no earlier than five years following the year of deferral associated with such stock units or, if earlier, six months after the date the reporting person separates from service with the Issuer or the date of death of the reporting person. /s/ David J. Treinen (signed by Deneen Shadewald as Power of Attorney for Reporting Person) 2016-02-04