{"transactions":[{"id":808154,"issuer":{"id":4087,"kind":"organization","name":"Otter Tail Corp"},"owners":[{"id":52396,"kind":"person","name":"Nelson Tyler J","position":1,"cik":"0002129002","reported_name":"Nelson Tyler J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, Chief Financial Officer"}}],"security":"Restricted Stock Units","published_at":"2026-04-15T15:19:37.000Z","date":"2026-04-13","kind":"grant","planned":false,"acquired":true,"shares":800,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each restricted stock unit represents a contingent right to receive one share of Otter Tail Corporation stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The restricted stock units vest in four equal annual installments beginning the date shown above."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The restricted stock units vest in four equal annual installments beginning the date shown above."}],"balance_after":800,"derivative":{"exercise_date":"2027-02-06","underlying":"Common Stock","underlying_shares":800},"source":{"system":"sec-edgar","filing":"0002129002-26-000004","document":"wk-form4_1776266374.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1466593/000212900226000004/wk-form4_1776266374.xml","form_type":"4"}}]}