Compass Minerals Intl Inc (CMP)
CMP moved a median of 0.00% 30 minutes after news, and -0.10% by the close. How CMP actually reacts to news — the realized, point-in-time move the market made, measured across 862 labeled events over the last three years with zero look-ahead.
CMP’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 44% | 861 |
| 30-min | 0.00% | 49% | 861 |
| 60-min | -0.08% | 47% | 861 |
| to close | -0.10% | 47% | 858 |
| Middle 50% of CMP reactions | -0.66% to +0.77% |
|---|---|
| Median reaction (30-min) | 0.00% |
| Measured reactions | 862 |
Half of all Compass Minerals Intl Inc news events land between -0.66% and +0.77% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
How CMP reacts, by analyst action.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Analyst upgrades | 21 | -0.51% | 14% | -2.26% |
| Analyst downgrades | 14 | +0.05% | 71% | -1.27% |
| Rating reiterations | 16 | -0.08% | 50% | -0.09% |
Last 3 years, pulled 2026-09-21. Reaction = percent move vs. the price at the news timestamp. Counts and medians only. The same measurement runs across every name in the dataset. 3 further classes were observed with fewer than 10 measured events and are not published. See how CMP ranks against every other measured name →
That’s how CMP usually reacts — get an email when it moves on news →Email me when CMP moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to CMP's baseline. Nothing else.
Recent CMP events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Form 8-K COMPASS MINERALS INTERNA For: Oct 09 | SEC filing · Form 8-K | SEC EDGAR | +0.31% | -1.11% | |
| Compass Minerals Comments on Salt Exclusion from Section 338 Tariffs | Press release | Business Wire | +0.16% | -1.55% | |
| Form S-8 COMPASS MINERALS INTERNA | SEC filing · Form S-8 | SEC EDGAR | +1.20% | -1.83% | |
| Form 10-Q COMPASS MINERALS INTERNA For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | +3.46% | +4.35% | |
| Compass Minerals Announces Change in Operations Leadership | Press release | Business Wire | -0.52% | +6.96% | |
| Compass Minerals Reports Fiscal 2026 Third-Quarter Results | Press release | Business Wire | -0.52% | +6.96% | |
| Form 8-K COMPASS MINERALS INTERNA For: Aug 03 | SEC filing · Form 8-K | SEC EDGAR | -0.52% | +6.96% | |
| Form 8-K COMPASS MINERALS INTERNA For: Aug 05 | SEC filing · Form 8-K | SEC EDGAR | -0.52% | +6.96% | |
| Compass Minerals Announces Conference Call to Discuss Third Quarter Fiscal 2026 Results | Press release | Business Wire | +0.96% | +2.40% | |
| Compass Minerals Announces S&P Global Ratings Upgrade to B+ | Press release | Business Wire | +0.18% | +1.69% | |
| Form 11-K COMPASS MINERALS INTERNA For: Dec 31 | SEC filing · Form 11-K | SEC EDGAR | -0.35% | -1.14% | |
| Form SD COMPASS MINERALS INTERNA | SEC filing · Form SD | SEC EDGAR | +0.18% | +1.69% | |
| EnergyX Signs Agreement with Compass Minerals to Advance up to 30,000-ton Commercial Lithium DLE Facility in Utah | Press release | PR Newswire | +0.72% | -0.31% | |
| Compass Minerals Announces Participation in Deutsche Bank’s 17th Annual Basic Materials Conference in June 2026 | Press release | Business Wire | +0.02% | -5.58% | |
| Form 10-Q COMPASS MINERALS INTERNA For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | +0.66% | -3.15% | |
| Compass Minerals Reports Fiscal 2026 Second-Quarter Results | Press release | Business Wire | -2.06% | +9.54% | |
| Compass Minerals Sets Date for Conference Call to Discuss Second-Quarter Fiscal 2026 Results | Press release | Business Wire | +0.00% | +2.82% | |
| Compass Minerals Continues Balance Sheet Transformation and Deleveraging | Press release | Business Wire | -0.91% | -1.45% | |
| Form 8-K COMPASS MINERALS INTERNA For: Mar 20 | SEC filing · Form 8-K | SEC EDGAR | -0.91% | -1.45% | |
| Form 8-K COMPASS MINERALS INTERNA For: Mar 05 | SEC filing · Form 8-K | SEC EDGAR | -0.84% | -1.72% | |
| Form 10-Q COMPASS MINERALS INTERNA For: Dec 31 | SEC filing · Form 10-Q | SEC EDGAR | -1.89% | +0.14% | |
| Compass Minerals Reports Fiscal 2026 First-Quarter Results | Press release | Business Wire | -5.92% | -13.59% | |
| Form 8-K COMPASS MINERALS INTERNA For: Feb 04 | SEC filing · Form 8-K | SEC EDGAR | -5.92% | -13.59% | |
| Compass Minerals Announces Conference Call to Discuss First-Quarter Fiscal 2026 Results | Press release | Business Wire | +3.61% | +3.82% | |
| Form DEF 14A COMPASS MINERALS INTERNA For: Mar 05 | SEC filing · Form DEF | SEC EDGAR | -5.55% | -4.83% | |
| Form DEFA14A COMPASS MINERALS INTERNA | SEC filing · Form DEFA14A | SEC EDGAR | -5.55% | -4.83% | |
| Form 8-K COMPASS MINERALS INTERNA For: Dec 10 | SEC filing · Form 8-K | SEC EDGAR | +0.58% | -1.56% | |
| Summary Notice of Pendency and Proposed Settlement of Stockholder Derivative Actions | Press release | GlobeNewswire | +0.58% | -1.56% | |
| Form 8-K COMPASS MINERALS INTERNA For: Dec 18 | SEC filing · Form 8-K | SEC EDGAR | +0.64% | +4.70% | |
| Compass Minerals Announces Additions to Board of Directors | Press release | Business Wire | +0.64% | +4.70% | |
| Form 10-K COMPASS MINERALS INTERNA For: Sep 30 | SEC filing · Form 10-K | SEC EDGAR | +0.95% | -2.58% | |
| Compass Minerals Reports Fiscal Fourth-Quarter and Full-Year 2025 Results | Press release | Business Wire | +1.31% | -6.57% | |
| Form 8-K COMPASS MINERALS INTERNA For: Dec 08 | SEC filing · Form 8-K | SEC EDGAR | +1.31% | -6.57% | |
| Compass Minerals Selects Chief Human Resources Officer | Press release | Business Wire | -1.48% | +0.21% | |
| Form 8-K COMPASS MINERALS INTERNA For: Aug 15 | SEC filing · Form 8-K | SEC EDGAR | +0.96% | -1.29% | |
| Summary Notice of Proposed Settlement of Derivative Actions | Press release | GlobeNewswire | +0.96% | -1.29% | |
| Compass Minerals Announces Participation in Upcoming Investor Event | Press release | Business Wire | +0.00% | +0.00% | |
| Compass Minerals Reports Fiscal 2025 Third-Quarter Results | Press release | Business Wire | +0.43% | — | |
| Form 10-Q COMPASS MINERALS INTERNA For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.43% | — | |
| Form 8-K COMPASS MINERALS INTERNA For: Aug 11 | SEC filing · Form 8-K | SEC EDGAR | +0.43% | — | |
| Compass Minerals Announces Conference Call to Discuss Third-Quarter Fiscal 2025 Results | Press release | Business Wire | +0.00% | -1.59% | |
| Form 8-K COMPASS MINERALS INTERNA For: Jun 26 | SEC filing · Form 8-K | SEC EDGAR | +0.10% | +2.40% | |
| Form SD COMPASS MINERALS INTERNA | SEC filing · Form SD | SEC EDGAR | -0.07% | +0.70% | |
| Form 11-K COMPASS MINERALS INTERNA For: Dec 31 | SEC filing · Form 11-K | SEC EDGAR | +1.05% | +0.51% | |
| Compass Minerals Appoints Chief Accounting Officer | Press release | Business Wire | -1.16% | -0.61% | |
| Compass Minerals Closes on Sale of $650 Million Senior Notes due 2030 and Partial Redemption of Senior Notes due 2027 | Press release | Business Wire | -0.15% | -1.00% | |
| Form 8-K COMPASS MINERALS INTERNA For: Jun 16 | SEC filing · Form 8-K | SEC EDGAR | -0.15% | -1.00% | |
| Compass Minerals Announces Pricing of $650 Million Senior Notes due 2030 and Partial Redemption of Senior Notes due 2027 | Press release | Business Wire | +0.56% | +4.19% | |
| Form 8-K COMPASS MINERALS INTERNA For: Jun 03 | SEC filing · Form 8-K | SEC EDGAR | +0.56% | +4.19% | |
| Form 10-Q COMPASS MINERALS INTERNA For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | -1.17% | +5.31% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the CMP section they belong to.
Where else CMP is measured.
CMP earnings → · Analyst actions → · SEC filings →
Other Basic Materials names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| W.R. Grace & Co. (GRA) | 892 | +0.04% | 54% |
| Verso Corporation (VRS) | 891 | +0.01% | 52% |
| Synalloy Corporation (SYNL) | 862 | 0.00% | 46% |
| GLENCORE PLC UNSP/ADR (GLNCY) | 841 | +0.00% | 50% |
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 Basic Materials names, measured the same way →
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How the numbers are made.
How is Compass Minerals Intl Inc's median reaction calculated?
Every labeled CMP 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 862 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. 49% of CMP'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 CMP'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.