X0407 4 2023-04-27 1 0001180145 Cardiovascular Systems Inc CSII 0001174531 Ward Scott R. 1225 OLD HIGHWAY 8 NW ST. PAUL MN 55112 1 1 0 0 Chairman and CEO 0 Common Stock 2023-04-27 4 D 0 578310 20.00 D 232712 D Common Stock 2023-04-27 4 D 0 232712 20.00 D 0 D Restricted Stock Units 2023-04-27 4 D 0 34297 0 D Common Stock 34297 0 D Pursuant to the Agreement and Plan of Merger by and among Cardiovascular Systems, Inc., a Delaware corporation, Abbott Laboratories, an Illinois corporation, and Cobra Acquisition Co., a Delaware corporation (the "Merger Agreement"), each share of unvested restricted stock became fully vested immediately prior to the effective time of the merger. Shares of restricted stock were then cancelled as of the effective time of the merger in exchange for the right to receive a cash payment equal to $20.00 multiplied by the number of restricted stock units, without interest and less any required withholding of taxes. Converted pursuant to the Merger Agreement into the right to receive $20.00 in cash per share, without interest and less any required withholding taxes. Pursuant to the Merger Agreement, each unvested restricted stock unit became fully vested immediately prior to the effective time of the merger. Restricted stock units were then cancelled as of the effective time of the merger in exchange for the right to receive a cash payment equal to $20.00 multiplied by the number of restricted stock units, without interest and less any required withholding of taxes. /s/ Andrew Nick as Attorney-in-Fact for Scott R. Ward pursuant to Power of Attorney previously filed. 2023-04-27