X0306 4 2019-06-28 0 0000751978 VICOR CORP vicr 0000901484 VINCIARELLI PATRIZIO C/O VICOR CORPORATION 25 FRONTAGE ROAD ANDOVER MA 01810 1 1 1 0 Chairman and CEO Common Stock 9758893 D Common Stock 102712 I See footnote Non Qualified Stock Option 6.77 2019-06-28 4 A 0 779885 A 2024-07-21 Common Stock 779885 779885 D These shares are held by the Reporting Person as Trustee of the Patrizio Vinciarelli Irrevocable Trust U/A Dated 12/21/2012, established for the benefit of the child of the Reporting Person. 155,977 stock options are exercisable at 6/28/19. The remaining stock options vest on 7/21/2019, 7/21/2020, 7/21/2021 and 7/21/2022. In the Merger, each outstanding stock option was amended to provide that it will be settled in shares of Vicor Corporation common stock, and to adjust the number of shares issuable pursuant to the Merger's exchange ratio. /s/Richard J. Nagel Jr. Attorney in fact for Patrizio Vinciarelli 2019-07-02