SJW Group (SJW)
SJW moved a median of +0.09% 30 minutes after news, and -0.59% by the close. How SJW actually reacts to news — the realized, point-in-time move the market made, measured across 239 labeled events over the last three years with zero look-ahead.
SJW’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 32% | 152 |
| 30-min | +0.09% | 54% | 153 |
| 60-min | -0.03% | 49% | 153 |
| to close | -0.59% | 38% | 153 |
| Middle 50% of SJW reactions | -0.44% to +0.64% |
|---|---|
| Median reaction (30-min) | +0.09% |
| Measured reactions | 239 |
Half of all SJW Group news events land between -0.44% and +0.64% 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 SJW moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to SJW's baseline. Nothing else.
Recent SJW events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Form 8-K H2O AMERICA For: Mar 04 | SEC filing · Form 8-K | SEC EDGAR | — | — | |
| Form 8-K H2O AMERICA For: Mar 02 | SEC filing · Form 8-K | SEC EDGAR | — | — | |
| Form 10-K H2O AMERICA For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | — | — | |
| Form 8-K H2O AMERICA For: Feb 25 | SEC filing · Form 8-K | SEC EDGAR | — | — | |
| Maine Water Company’s New Unified Rate Structure to Benefit Customers | Press release | GlobeNewswire | — | — | |
| Form 8-K H2O AMERICA For: Dec 29 | SEC filing · Form 8-K | SEC EDGAR | — | — | |
| Form 8-K H2O AMERICA For: Dec 09 | SEC filing · Form 8-K | SEC EDGAR | — | — | |
| Form 10-Q H2O AMERICA For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | — | — | |
| Form 8-K H2O AMERICA For: Oct 27 | SEC filing · Form 8-K | SEC EDGAR | — | — | |
| Form 8-K H2O AMERICA For: Sep 16 | SEC filing · Form 8-K | SEC EDGAR | — | — | |
| Form 10-Q H2O AMERICA For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | — | — | |
| Form 8-K H2O AMERICA For: Jul 28 | SEC filing · Form 8-K | SEC EDGAR | — | — | |
| Form 8-K H2O AMERICA For: Jul 07 | SEC filing · Form 8-K | SEC EDGAR | — | — | |
| Form 8-K H2O AMERICA For: Jun 24 | SEC filing · Form 8-K | SEC EDGAR | — | — | |
| Form 8-K H2O AMERICA For: May 14 | SEC filing · Form 8-K | SEC EDGAR | — | — | |
| Form 8-K H2O AMERICA For: May 05 | SEC filing · Form 8-K | SEC EDGAR | — | — | |
| SJW Group Rebrands as H2O America | Press release | GlobeNewswire | — | — | |
| Form 10-Q SJW GROUP For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | -2.47% | -0.11% | |
| Form 8-K SJW GROUP For: Apr 28 | SEC filing · Form 8-K | SEC EDGAR | +1.87% | +3.20% | |
| SJW Group Announces First Quarter 2025 Financial Results | Press release | GlobeNewswire | +1.87% | +3.20% | |
| SJW Group Appoints Kay R. New as Chief Human Resources Officer | Press release | GlobeNewswire | +0.28% | -0.73% | |
| SJW Group to Report First-Quarter 2025 Financial Results on April 28 | Press release | GlobeNewswire | -0.39% | -2.54% | |
| Form 8-K SJW GROUP For: Mar 31 | SEC filing · Form 8-K | SEC EDGAR | +0.61% | +1.44% | |
| Form ARS SJW GROUP For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | +0.61% | +1.44% | |
| Form DEF 14A SJW GROUP For: May 14 | SEC filing · Form DEF | SEC EDGAR | +0.61% | +1.44% | |
| Form DEFA14A SJW GROUP | SEC filing · Form DEFA14A | SEC EDGAR | +0.61% | +1.44% | |
| Ann P. Kelly Promoted to Chief Financial Officer of SJW Group | Press release | GlobeNewswire | +0.61% | +1.44% | |
| Form 8-K SJW GROUP For: Feb 26 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +0.78% | |
| Form 10-K SJW GROUP For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | +0.91% | +0.34% | |
| Form 8-K SJW GROUP For: Feb 26 | SEC filing · Form 8-K | SEC EDGAR | +3.83% | +0.27% | |
| SJW Group Announces Leadership Transition and Executive Promotions to Drive Continued Growth | Press release | GlobeNewswire | +1.15% | +0.78% | |
| SJW Group Announces 2024 Financial Results | Press release | GlobeNewswire | +3.83% | +0.27% | |
| SJW Group to Report Fourth-Quarter and Full-Year 2024 Financial Results on February 26 | Press release | GlobeNewswire | -0.52% | +1.27% | |
| SJW Group Declares Dividend and Announces 2025 Dividend Increase | Press release | GlobeNewswire | -1.77% | -2.44% | |
| SJW Group Named One of America’s Most Responsible Companies 2025 by Newsweek | Press release | GlobeNewswire | -1.47% | -3.68% | |
| SJW Group Announces Deferral of San Jose Water Company’s Cost of Capital Filing to May 1, 2026 | Press release | GlobeNewswire | +0.84% | +3.45% | |
| SJW Group Announces CPUC Decision Approving San Jose Water’s General Rate Case | Press release | GlobeNewswire | -0.64% | -1.86% | |
| SJW Group Appoints Douwe Busschops as Chief Information Officer | Press release | GlobeNewswire | +0.51% | +0.11% | |
| Ann P. Kelly Joins SJW Group as Chief Accounting Officer and Principal Accounting Officer | Press release | GlobeNewswire | +0.00% | -1.08% | |
| Form 8-K SJW GROUP For: Nov 06 | SEC filing · Form 8-K | SEC EDGAR | +0.40% | -1.08% | |
| Form 8-A12B SJW GROUP | SEC filing · Form 8-A12B | SEC EDGAR | -0.18% | -0.80% | |
| Form CERT SJW GROUP | SEC filing · Form CERT | SEC EDGAR | -0.18% | -0.80% | |
| Form 25 SJW GROUP | SEC filing · Form 25 | SEC EDGAR | -0.18% | -0.80% | |
| Form N-8A SJW GROUP | SEC filing · Form N-8A | SEC EDGAR | -0.18% | -0.80% | |
| Form 8-K SJW GROUP For: Oct 29 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -1.54% | |
| Form S-3ASR SJW GROUP | SEC filing · Form S-3ASR | SEC EDGAR | +0.00% | -1.54% | |
| Form 10-Q SJW GROUP For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.00% | -1.54% | |
| Form 8-K SJW GROUP For: Oct 25 | SEC filing · Form 8-K | SEC EDGAR | -0.26% | +1.40% | |
| SJW Group Announces Third Quarter 2024 Financial Results | Press release | GlobeNewswire | -0.26% | +1.40% | |
| SJW Group Sets Date for Release of 2024 Third Quarter Financial Results | Press release | GlobeNewswire | -0.12% | +1.34% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the SJW section they belong to.
Where else SJW is measured.
SJW earnings → · Analyst actions → · SEC filings →
Other Utilities names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| OGE Energy Corp (OGE) | 248 | +0.02% | 51% |
| Alliant Energy Corporation (LNT) | 243 | -0.01% | 48% |
| Middlesex Water Company (MSEX) | 234 | -0.04% | 45% |
| Enel Americas S.A. American Depositary Shares (ENIA) | 232 | -0.06% | 41% |
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 →
Every ticker we measure the same way24
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Browse all tickers
Every name we’ve measured, in one place.
How the numbers are made.
How is SJW Group's median reaction calculated?
Every labeled SJW 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 239 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. 54% of SJW'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 SJW'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.