Transaction Details

Footnotes

Each restricted stock unit represents a contingent right to receive one share of Otter Tail Corporation stock. | These shares were withheld by the Corporation to pay taxes due upon vesting of this award, exempt pursuant to Rule 16b-3(e). | Total direct holdings include shares held jointly with spouse and shares acquired through the Employee Stock Purchase Plan, the Dividend Reinvestment Plan, and shares acquired pursuant to Restricted Stock Awards and Performance Share Awards. | The restricted stock units vest in four equal annual installments beginning the date shown above.