Offering Periods. The Plan will be implemented by consecutive, overlapping Offering Periods with a new Offering Period commencing on the first Trading Day on or after May 10 and November 10 each year, or on such other date as the Administrator will determine; provided, however, that the first Offering Period under the Plan will commence with the first Trading Day on or after November 10, 2018 and end on the first Trading Day on or before November 10, 2019. The Administrator will have the power to change the duration of Offering Periods (including the commencement dates thereof) with respect to future Offerings without stockholder approval if such change is announced prior to the scheduled beginning of the first Offering Period to be affected thereafter; provided, however, that no Offering Period may last more than 27 months.

Offering Periods. Any Eligible Employee on a given Enrollment Date will be eligible to participate in the Plan, subject to the requirements of Section 5.

Offering Periods. Offering Periods will expire on the earliest to occur of # the completion of the purchase of Shares on the last Exercise Date occurring within twenty-seven (27) months of the applicable Enrollment Date on which the option to purchase Shares was granted, or # such shorter period as may be established by the Administrator from time to time, in its discretion and on a uniform and nondiscriminatory basis, prior to an Enrollment Date for all options to be granted on such Enrollment Date.

Offering Periods. Offering Periods will expire on the earliest to occur of # the completion of the purchase of Shares on the last Exercise Date occurring within twenty-seven (27) months of the applicable Enrollment Date on which the option to purchase Shares was granted, or # such shorter period as may be established by the Administrator from time to time, in its discretion and on a uniform and nondiscriminatory basis, prior to an Enrollment Date for all options to be granted on such Enrollment Date.

Offering Periods. Prior to the New Offering Period Commencement Date, the Plan was implemented by a series of Offering Periods of approximately twenty-four (24) months duration, with new Offering Periods commencing on or about May 1 and November 1 of each year and ending on April 30 and October 31, respectively, approximately twenty-four (24) months later. Beginning on the New Offering Period Commencement Date, the Plan shall be implemented by consecutive Offering Periods of approximately six (6) months duration, with new Offering Periods commencing on or about May 1 and November 1 of each year (or at such other time or times as may be determined by the Administrator) and ending on the following October 31 and April 30, respectively. The Plan shall continue until terminated in accordance with Section 20 hereof. The Administrator shall have the power to change the duration and/or the frequency of Offering Periods with respect to future offerings without stockholder approval if such change is announced at least five (5) days prior to the scheduled beginning of the first Offering Period to be affected.

Offering Periods. The Administrator may from time to time grant or provide for the grant of rights to purchase Common Stock under the Plan to Eligible Employees during one or more periods (each, an “Offering Period”) selected by the Administrator. The terms and conditions applicable to each Offering Period shall be set forth in an “Offering Document” adopted by the Administrator, which Offering Document shall be in such form and shall contain such terms and conditions as the Administrator shall deem appropriate and shall be incorporated by reference into and made part of the Plan and shall be attached hereto as part of the Plan. The provisions of separate Offering Periods under the Plan need not be identical.

Except as otherwise set forth below, the Plan shall be implemented by a series of Offerings (each, an “Offering”) during which shares of Common Stock may be purchased by Participants. Offering Periods shall begin on February 1 and August 1 of each year and shall end on the next July 31 and January 31, respectively, occurring thereafter; provided, however, that the first Offering Period shall begin on the Effective Date and shall end on January 31, 2019.

Offering Periods. The Plan shall be implemented by consecutive Offering Periods with a new Offering Period commencing on the first Trading Day on or after May 1st and November 1st each year, or on such other date as the Board shall determine, and continuing thereafter. The Plan shall continue until terminated in accordance with Section 19 hereof. The Board shall have the power to change the duration and/or the frequency of Offering Periods (including the commencement dates thereof) with respect to future offerings without shareholder approval if such change is announced prior to the scheduled beginning of the first Offering Period to be affected.

Purchase Periods for Ongoing Offering Periods. With respect to the Ongoing Offering Periods, each such Offering Period consists of four (4) consecutive Purchase Periods of six (6) months’ duration. The last day of each Purchase Period shall be the “Purchase Date” for such Purchase Period. A Purchase Period commencing on May 1 shall end on the next October 31 and a Purchase Period commencing on November 1 shall end on the next April 30.

Subject to the provisions of Section 6, an Eligible Employee may elect to participate in an Offering Period under the Plan by completing a form authorizing payroll deductions, in the form provided by the Corporation or caused to be provided by the Corporation (such as through a third-party service provider designated by the Administrator) (the "Participation Form"), and filing such Participation Form with the Corporation during the enrollment period established by the Administrator prior to the beginning of the Offering Period and in accordance with the instructions in such Participation Form. The Participation Form will become effective on the first Offering Date to occur after such form is properly filed with the Corporation.