Otter Tail Corp

OTTRCIK 0001466593 · Every Form 4 filed by insiders at this issuer. See financials →

Annual report (10-K)

Latest 10-K/A filed Feb 23, 2026. Sentiment + YoY language diff vs prior year. Read sections →

Signal:NeutralFull-doc fallback

Full filing:tone -0.0065

Sentiment via Loughran-McDonald lexicon · YoY diff via Jaccard similarity + paragraph set difference.

Recent 8-K announcements

Per-item disclosure feed. Item 2.02 is the earnings release.

May 29, 20261.01 · Entry into a Material Definitive Agreeme May 15, 2026no items parsed May 5, 2026no items parsed Apr 15, 2026no items parsed Apr 14, 2026no items parsed

YoY shift: Unscored

Year-over-year tone shift - average net-tone change across Risk Factors and MD&A vs the prior 10-K.

Why YoY instead of absolute: the LM lexicon has ~6.6× more negative words than positive (legal/risk-disclosure language is heavy on hedging), so every 10-K reads bearish on raw tone. Year-over-year change strips that bias and surfaces the actual shift in management's framing.

Per-snippet highlights

Sentence-level sentiment highlighting with category and subcategory filters is coming once the snippet-scoring pipeline lands. For now, dig into the actual section text on the Sections tab.

Top insiders

Most active reporters at Otter Tail Corp

Name	Roles	Filings
Smestad Jennifer O.	Officer	11
Knutson Paul L	Officer	10
MacFarlane Charles S	Officer	10
Rogelstad Timothy J	Officer	10
Abbott John S	Officer	9

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All filings

110 Form 4 / 4-A filings, newest first

Filed	Insider	Top transaction	Shares	Price	Value
Apr 15, 2026	Rogelstad Timothy J President	Holdings only	-	-	-
Apr 15, 2026	Smestad Jennifer O. SVP General Counsel & Corp Sec	Holdings only	-	-	-
Apr 15, 2026	Wahlund Todd R Senior Vice President	Holdings only	-	-	-
Apr 15, 2026	Nelson Tyler J VP, Chief Financial Officer	Holdings only	-	-	-
Apr 14, 2026	Webb Thomas J Director	AGrant	1,500	-	-

Showing 1-5 of 110

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Real-time Form 4 intelligence. Smarter insider tracking.

Filed		Top transaction	Shares	Price	Value