#1 Dividend equivalent units, which vest on the first anniversary of the grant of the restricted stock units to which they relate, are payable solely in shares of common stock upon vesting (subject to deferral if so elected by the Insider).

#2 Fully vested dividend equivalents received on restricted stock units payable solely in shares of common stock following the date the Insider ceases serving as a director.

#1 Dividend equivalent units, which vest on the first anniversary of the grant of the restricted stock units to which they relate, are payable solely in shares of common stock upon vesting (subject to deferral if so elected by the Insider).

#2 Fully vested dividend equivalents received on restricted stock units payable solely in shares of common stock following the date the Insider ceases serving as a director.

#1 This price is a weighted average price. These shares were sold in multiple transactions at prices ranging from $78.65 to $78.75, inclusive. The reporting person undertakes to provide to WEC, any security holder of WEC, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within such range.

#1 This price is a weighted average price. These shares were sold in multiple transactions at prices ranging from $78.65 to $78.75, inclusive. The reporting person undertakes to provide to WEC, any security holder of WEC, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within such range.