Seaboard Corporation (SEB)
SEB moved a median of +0.07% 30 minutes after news, and +0.02% by the close. How SEB actually reacts to news — the realized, point-in-time move the market made, measured across 139 labeled events over the last three years with zero look-ahead.
SEB’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 42% | 136 |
| 30-min | +0.07% | 57% | 138 |
| 60-min | +0.02% | 51% | 138 |
| to close | +0.02% | 50% | 139 |
| Middle 50% of SEB reactions | -0.26% to +0.43% |
|---|---|
| Median reaction (30-min) | +0.07% |
| Measured reactions | 139 |
Half of all Seaboard Corporation news events land between -0.26% and +0.43% 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 SEB moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to SEB's baseline. Nothing else.
Recent SEB events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Form 10-Q SEABOARD CORP /DE/ For: Jul 04 | SEC filing · Form 10-Q | SEC EDGAR | +0.00% | -4.36% | |
| Form 8-K SEABOARD CORP /DE/ For: Aug 04 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -4.36% | |
| SEABOARD CORPORATION REPORT OF EARNINGS AND DIVIDEND DECLARATION | Press release | PR Newswire | +0.00% | -4.36% | |
| Form 10-Q SEABOARD CORP /DE/ For: Apr 04 | SEC filing · Form 10-Q | SEC EDGAR | +0.00% | -13.77% | |
| Form 8-K SEABOARD CORP /DE/ For: May 05 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -13.77% | |
| SEABOARD CORPORATION REPORT OF EARNINGS AND DIVIDEND DECLARATION | Press release | PR Newswire | +0.00% | -13.77% | |
| Form 8-K SEABOARD CORP /DE/ For: Apr 22 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +0.50% | |
| Form ARS SEABOARD CORP /DE/ For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | +0.54% | +0.56% | |
| Form DEF 14A SEABOARD CORP /DE/ For: Apr 20 | SEC filing · Form DEF | SEC EDGAR | +0.54% | +0.56% | |
| Form 10-K SEABOARD CORP /DE/ For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | -0.25% | -3.35% | |
| Form 8-K SEABOARD CORP /DE/ For: Feb 12 | SEC filing · Form 8-K | SEC EDGAR | -0.25% | -3.35% | |
| SEABOARD CORPORATION REPORT OF EARNINGS AND DIVIDEND DECLARATION | Press release | PR Newswire | -0.25% | -3.35% | |
| Form 10-Q SEABOARD CORP /DE/ For: Sep 27 | SEC filing · Form 10-Q | SEC EDGAR | -1.03% | -3.22% | |
| Form 8-K SEABOARD CORP /DE/ For: Oct 28 | SEC filing · Form 8-K | SEC EDGAR | -1.03% | -3.22% | |
| SEABOARD CORPORATION REPORT OF EARNINGS AND DIVIDEND DECLARATION | Press release | PR Newswire | -1.03% | -3.22% | |
| Form 10-Q SEABOARD CORP /DE/ For: Jun 28 | SEC filing · Form 10-Q | SEC EDGAR | -0.56% | +2.73% | |
| Form 8-K SEABOARD CORP /DE/ For: Jul 29 | SEC filing · Form 8-K | SEC EDGAR | -0.56% | +2.73% | |
| SEABOARD CORPORATION REPORT OF EARNINGS AND DIVIDEND DECLARATION | Press release | PR Newswire | -0.56% | +2.73% | |
| Form 8-K SEABOARD CORP /DE/ For: May 21 | SEC filing · Form 8-K | SEC EDGAR | -0.77% | +3.21% | |
| Seaboard Corporation Announces a $100 million Share Repurchase Program | Press release | PR Newswire | -0.77% | +3.21% | |
| Form 8-K SEABOARD CORP /DE/ For: Apr 28 | SEC filing · Form 8-K | SEC EDGAR | +0.54% | +0.51% | |
| Form 10-Q SEABOARD CORP /DE/ For: Mar 29 | SEC filing · Form 10-Q | SEC EDGAR | +1.25% | +3.34% | |
| Form 8-K SEABOARD CORP /DE/ For: Apr 28 | SEC filing · Form 8-K | SEC EDGAR | +1.25% | +3.34% | |
| SEABOARD CORPORATION REPORT OF EARNINGS AND DIVIDEND DECLARATION | Press release | PR Newswire | +1.25% | +3.34% | |
| Form ARS SEABOARD CORP /DE/ For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | -0.15% | +8.87% | |
| Form DEF 14A SEABOARD CORP /DE/ For: Apr 28 | SEC filing · Form DEF | SEC EDGAR | -0.15% | +8.87% | |
| Form 10-K SEABOARD CORP /DE/ For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | -0.39% | +8.80% | |
| Form 8-K SEABOARD CORP /DE/ For: Feb 13 | SEC filing · Form 8-K | SEC EDGAR | -0.39% | +8.80% | |
| SEABOARD CORPORATION REPORT OF EARNINGS AND DIVIDEND DECLARATION | Press release | PR Newswire | -0.39% | +8.80% | |
| Wolf Haldenstein Adler Freeman & Herz LLP announces that it is investigating Seaboard Corp. for potential violations of securities laws | Press release | PR Newswire | -0.16% | -0.23% | |
| Wolf Haldenstein Adler Freeman & Herz LLP announces that it is investigating Seaboard Corp. for potential violations of securities laws | Press release | Accesswire | +0.56% | -1.19% | |
| Form 10-Q SEABOARD CORP /DE/ For: Sep 28 | SEC filing · Form 10-Q | SEC EDGAR | -0.31% | -1.59% | |
| Form 8-K SEABOARD CORP /DE/ For: Oct 29 | SEC filing · Form 8-K | SEC EDGAR | -0.31% | -1.59% | |
| SEABOARD CORPORATION REPORT OF EARNINGS AND DIVIDEND DECLARATION | Press release | PR Newswire | -0.31% | -1.59% | |
| Form 10-Q SEABOARD CORP /DE/ For: Jun 29 | SEC filing · Form 10-Q | SEC EDGAR | -0.67% | +0.24% | |
| Form 8-K SEABOARD CORP /DE/ For: Jul 30 | SEC filing · Form 8-K | SEC EDGAR | -0.67% | +0.24% | |
| SEABOARD CORPORATION REPORT OF EARNINGS AND DIVIDEND DECLARATION | Press release | PR Newswire | -0.67% | +0.24% | |
| Form 10-Q SEABOARD CORP /DE/ For: Mar 30 | SEC filing · Form 10-Q | SEC EDGAR | -0.21% | -2.25% | |
| Form 8-K SEABOARD CORP /DE/ For: Apr 30 | SEC filing · Form 8-K | SEC EDGAR | -0.21% | -2.25% | |
| REPORT OF EARNINGS AND DIVIDEND DECLARATION | Press release | PR Newswire | -0.21% | -2.25% | |
| Form 8-K SEABOARD CORP /DE/ For: Apr 22 | SEC filing · Form 8-K | SEC EDGAR | -0.51% | +0.04% | |
| Form 8-K SEABOARD CORP /DE/ For: Mar 25 | SEC filing · Form 8-K | SEC EDGAR | +1.10% | +0.76% | |
| SEABOARD FOODS NAMES CHAD GROVES AS PRESIDENT AND CEO TO SUCCEED PETER BROWN AFTER RETIREMENT | Press release | PR Newswire | +1.10% | +0.76% | |
| Form ARS SEABOARD CORP /DE/ For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | +0.94% | +0.32% | |
| Form DEF 14A SEABOARD CORP /DE/ For: Apr 22 | SEC filing · Form DEF | SEC EDGAR | +0.94% | +0.32% | |
| Form 10-K SEABOARD CORP /DE/ For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | +0.00% | -1.02% | |
| Form 8-K SEABOARD CORP /DE/ For: Feb 13 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -1.02% | |
| SEABOARD CORPORATIONREPORT OF EARNINGS AND DIVIDEND DECLARATION | Press release | PR Newswire | +0.00% | -1.02% | |
| Form 8-K SEABOARD CORP /DE/ For: Jan 25 | SEC filing · Form 8-K | SEC EDGAR | +0.09% | +0.56% | |
| Form 8-K SEABOARD CORP /DE/ For: Nov 10 | SEC filing · Form 8-K | SEC EDGAR | +0.49% | -0.43% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the SEB section they belong to.
Where else SEB is measured.
SEB earnings → · Analyst actions → · SEC filings →
Other Industrials names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| OPES ACQUISITION CORP UNITS (OPESU) | 140 | 0.00% | 39% |
| Haynes International, Inc. (HAYN) | 139 | -0.06% | 35% |
| SFL Corporation Ltd (SFL) | 139 | +0.04% | 50% |
| Seanergy Maritime Holdings Corp (SHIP) | 139 | +0.35% | 55% |
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 Industrials names, measured the same way →
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Every name we’ve measured, in one place.
How the numbers are made.
How is Seaboard Corporation's median reaction calculated?
Every labeled SEB 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 139 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. 57% of SEB'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 SEB'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.