Otter Tail Corporation (OTTR)
OTTR moved a median of -0.03% 30 minutes after news, and -0.22% by the close. How OTTR actually reacts to news — the realized, point-in-time move the market made, measured across 187 labeled events over the last three years with zero look-ahead.
OTTR’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 49% | 176 |
| 30-min | -0.03% | 47% | 187 |
| 60-min | -0.03% | 46% | 187 |
| to close | -0.22% | 42% | 186 |
| Middle 50% of OTTR reactions | -0.31% to +0.31% |
|---|---|
| Median reaction (30-min) | -0.03% |
| Measured reactions | 187 |
Half of all Otter Tail Corporation news events land between -0.31% and +0.31% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
Email me when OTTR moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to OTTR's baseline. Nothing else.
Recent OTTR events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Otter Tail Corporation Will Host Conference Call on Third Quarter 2026 Financial Results | Press release | Business Wire | +0.14% | +0.28% | |
| Form 8-K Otter Tail Corp For: Aug 28 | SEC filing · Form 8-K | SEC EDGAR | +0.07% | -0.57% | |
| Form 10-Q Otter Tail Corp For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | — | +1.72% | |
| Form 8-K Otter Tail Corp For: Aug 03 | SEC filing · Form 8-K | SEC EDGAR | -0.14% | +5.21% | |
| Otter Tail Corporation Announces Second Quarter Results and Updates Annual Earnings Guidance | Press release | Business Wire | -0.14% | +5.21% | |
| Otter Tail Corporation Will Host Conference Call on Second Quarter 2026 Financial Results | Press release | Business Wire | -0.06% | -0.63% | |
| Form 8-K Otter Tail Corp For: Jun 17 | SEC filing · Form 8-K | SEC EDGAR | +0.86% | +0.64% | |
| Form 8-K Otter Tail Corp For: Jun 04 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -0.68% | |
| Form 8-K Otter Tail Corp For: May 28 | SEC filing · Form 8-K | SEC EDGAR | +0.28% | -0.38% | |
| Form SD Otter Tail Corp | SEC filing · Form SD | SEC EDGAR | -0.01% | -0.42% | |
| Antora and POET Commission 5 Gigawatt-Hour Thermal Battery Project to Power South Dakota Industry with Affordable Energy | Press release | Business Wire | -0.44% | -1.23% | |
| Form 8-K Otter Tail Corp For: May 15 | SEC filing · Form 8-K | SEC EDGAR | +0.11% | +0.31% | |
| Otter Tail Power Company Files 15-Year Resource Plan with Minnesota Regulators | Press release | Business Wire | -0.05% | -0.13% | |
| Form 10-Q Otter Tail Corp For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | — | +0.40% | |
| Form 8-K Otter Tail Corp For: May 04 | SEC filing · Form 8-K | SEC EDGAR | +0.15% | -2.16% | |
| Otter Tail Corporation Announces First Quarter Earnings and Affirms 2026 EPS Guidance | Press release | Business Wire | +0.15% | -2.16% | |
| Form 8-K Otter Tail Corp For: Apr 13 | SEC filing · Form 8-K | SEC EDGAR | — | -1.09% | |
| Otter Tail Corporation Will Host Conference Call on First Quarter 2026 Financial Results | Press release | Business Wire | — | -1.09% | |
| Form 8-K Otter Tail Corp For: Apr 13 | SEC filing · Form 8-K | SEC EDGAR | -0.32% | -1.55% | |
| Otter Tail Corporation Announces President and CFO Transitions | Press release | Business Wire | -0.11% | -3.78% | |
| Form 8-K Otter Tail Corp For: Mar 19 | SEC filing · Form 8-K | SEC EDGAR | +0.12% | +0.99% | |
| Otter Tail Power Company Completes Rate Review in South Dakota | Press release | Business Wire | +0.02% | -0.26% | |
| Form ARS Otter Tail Corp For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | +1.44% | +0.97% | |
| Form DEF 14A Otter Tail Corp For: Apr 13 | SEC filing · Form DEF | SEC EDGAR | +1.35% | +0.97% | |
| Form DEFA14A Otter Tail Corp | SEC filing · Form DEFA14A | SEC EDGAR | +1.25% | +0.97% | |
| Form 10-K/A Otter Tail Corp For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | -0.13% | +0.64% | |
| Form 10-K Otter Tail Corp For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | +0.16% | -0.47% | |
| Form PRE 14A Otter Tail Corp For: Apr 13 | SEC filing · Form PRE | SEC EDGAR | +0.08% | -0.65% | |
| Form 8-K Otter Tail Corp For: Feb 16 | SEC filing · Form 8-K | SEC EDGAR | -0.17% | -2.40% | |
| Otter Tail Corporation Announces Annual Earnings and Initiates 2026 Earnings Guidance | Press release | Business Wire | -0.17% | -2.40% | |
| Otter Tail Corporation Will Host Conference Call on 2025 Financial Results | Press release | Business Wire | +0.24% | +0.41% | |
| Otter Tail Corporation Increases Quarterly Dividend by 10 Percent | Press release | Business Wire | +0.33% | +2.11% | |
| Form 8-K Otter Tail Corp For: Dec 16 | SEC filing · Form 8-K | SEC EDGAR | +0.31% | -1.94% | |
| Otter Tail Corporation Appoints Chris Clark and Steve Rasche to Board of Directors | Press release | Business Wire | +0.15% | -0.20% | |
| Form 10-Q Otter Tail Corp For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | -0.12% | +1.97% | |
| Form 8-K Otter Tail Corp For: Nov 03 | SEC filing · Form 8-K | SEC EDGAR | -2.58% | +6.47% | |
| Otter Tail Corporation Announces Third Quarter Earnings, Increases Annual Earnings Guidance and Uplifts Long-Term Financial Targets | Press release | Business Wire | -2.58% | +6.47% | |
| Otter Tail Power Company Requests Minnesota Rate Increase | Press release | Business Wire | +0.00% | +0.23% | |
| Otter Tail Corporation Will Host Conference Call on Third Quarter 2025 Financial Results | Press release | Business Wire | +0.05% | +0.23% | |
| Form 10-Q Otter Tail Corp For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.16% | -1.04% | |
| Form 8-K Otter Tail Corp For: Aug 04 | SEC filing · Form 8-K | SEC EDGAR | +4.30% | +6.19% | |
| Otter Tail Corporation Announces Second Quarter Earnings and Increases Annual Earnings Guidance | Press release | Business Wire | +4.30% | +6.19% | |
| Otter Tail Corporation Will Host Conference Call on Second Quarter 2025 Financial Results | Press release | Business Wire | -0.20% | -0.62% | |
| Form 8-K Otter Tail Corp For: Jun 05 | SEC filing · Form 8-K | SEC EDGAR | +0.14% | -0.01% | |
| Form 8-K Otter Tail Corp For: Jun 04 | SEC filing · Form 8-K | SEC EDGAR | +0.12% | +0.50% | |
| Otter Tail Power Company Requests Rate Review in South Dakota | Press release | Business Wire | +0.04% | -0.23% | |
| Form SD Otter Tail Corp | SEC filing · Form SD | SEC EDGAR | -0.39% | -0.27% | |
| Form 10-Q Otter Tail Corp For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | +0.00% | +0.32% | |
| Form 8-K Otter Tail Corp For: May 05 | SEC filing · Form 8-K | SEC EDGAR | +0.80% | -2.19% | |
| Otter Tail Corporation Announces First Quarter Earnings and Affirms Annual Earnings Guidance | Press release | Business Wire | +0.80% | -2.19% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the OTTR section they belong to.
Where else OTTR is measured.
OTTR earnings → · Analyst actions → · SEC filings →
Other Utilities names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| Ellomay Capital Ltd Ordinary Shares (Israel) (ELLO) | 193 | 0.00% | 44% |
| Consolidated Water Co. Ltd. - Ordinary Shares (CWCO) | 190 | +0.05% | 55% |
| Central Puerto S.A. American Depositary Shares (each represents ten Common Shares) (CEPU) | 185 | +0.11% | 52% |
| EMERA INC (EMRAF) | 182 | 0.00% | 40% |
Same sector, same measurement: percent move vs. the price at the news timestamp, read at 30 minutes. Sample sizes differ, so the medians are comparable but the confidence behind them is not.
All Utilities names, measured the same way →
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Every name we’ve measured, in one place.
How the numbers are made.
How is Otter Tail Corporation's median reaction calculated?
Every labeled OTTR news event is measured from its own timestamp: the last trade before the news is the base price, and the move is read at fixed horizons — 30 minutes of trading, then the close. The median across 187 events is what this page reports. Point-in-time, zero look-ahead: no event borrows information from a later one.
What counts as a positive reaction?
Any event whose price move is above zero at the horizon, relative to the last trade before the news timestamp. 47% of OTTR's measured events are up at 30 minutes; the rest close the window flat or negative.
How often is this page updated?
The news table refreshes automatically as new events are labeled and priced. The reaction medians are re-pulled in batches from the dataset — the figures here are as of 2026-09-21.
Does OTTR's past reaction predict its next one?
No. These are realized facts about past events, not forecasts. They describe a distribution — they say nothing certain about any future move.