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 acquired through the dividend reinvestment plan, the Employee Stock Purchase Plan, and shares acquired pursuant to restricted stock unit distributions. | The restricted stock units vest in four equal annual installments beginning the date shown above. | Restricted stock units vest four years from date shown above.