Columbia Financial, Inc. (CLBK)
CLBK moved a median of 0.00% 30 minutes after news, and -0.06% by the close. How CLBK actually reacts to news — the realized, point-in-time move the market made, measured across 718 labeled events over the last three years with zero look-ahead.
CLBK’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 46% | 628 |
| 30-min | 0.00% | 50% | 718 |
| 60-min | -0.05% | 42% | 718 |
| to close | -0.06% | 41% | 702 |
| Middle 50% of CLBK reactions | -0.28% to +0.35% |
|---|---|
| Median reaction (30-min) | 0.00% |
| Measured reactions | 718 |
Half of all Columbia Financial, Inc. news events land between -0.28% and +0.35% 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 CLBK moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to CLBK's baseline. Nothing else.
Recent CLBK events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Form 10-Q Columbia Financial, Inc. For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.65% | — | |
| Columbia Financial, Inc. Announces Q2 2026 Financial Results and Commences Quarterly Cash Dividend | Press release | GlobeNewswire | -0.09% | -1.10% | |
| Form 8-K Columbia Financial, Inc. For: Jul 30 | SEC filing · Form 8-K | SEC EDGAR | -0.09% | -1.10% | |
| Form S-8 Columbia Financial, Inc. | SEC filing · Form S-8 | SEC EDGAR | -0.27% | -0.46% | |
| Form 8-K/A Columbia Financial, Inc. For: Jul 28 | SEC filing · Form 8-K | SEC EDGAR | -0.27% | -0.46% | |
| Form 15-12G Columbia Financial, Inc. | SEC filing · Form 15-12G | SEC EDGAR | +1.44% | +3.07% | |
| Form 8-K12B Columbia Financial, Inc. For: Jul 16 | SEC filing · Form 8-K12B | SEC EDGAR | +1.44% | +3.07% | |
| Columbia Financial, Inc. Announces Completion of Second Step Conversion and $1.7 Billion Stock Offering and Acquisition of Northfield Bancorp, Inc. | Press release | GlobeNewswire | +1.44% | +3.07% | |
| Form 8-K Columbia Financial, Inc. For: Jul 16 | SEC filing · Form 8-K | SEC EDGAR | -1.01% | +2.50% | |
| Columbia Financial, Inc. Announces the Results of Its Offering; Final Merger Consideration; and Anticipated Closing Date | Press release | GlobeNewswire | -1.01% | +2.50% | |
| Form EFFECT Columbia Financial, Inc. | SEC filing · Form EFFECT | SEC EDGAR | -1.17% | -3.17% | |
| Columbia Financial, Inc. Commences Firm Commitment Underwritten Offering | Press release | GlobeNewswire | +0.56% | +0.78% | |
| Form 8-K Columbia Financial, Inc. For: Jul 01 | SEC filing · Form 8-K | SEC EDGAR | +0.52% | -0.61% | |
| Form POS AM Columbia Financial, Inc. | SEC filing · Form POS | SEC EDGAR | +0.52% | -0.61% | |
| Columbia Financial, Inc. Announces Receipt of Stockholder and Depositor Approvals of Pending Second Step Conversion and Updated Results of Subscription Offering | Press release | GlobeNewswire | +0.52% | -0.61% | |
| Form 8-K Columbia Financial, Inc. For: Jun 23 | SEC filing · Form 8-K | SEC EDGAR | -0.40% | +0.90% | |
| Form 11-K Columbia Financial, Inc. For: Dec 31 | SEC filing · Form 11-K | SEC EDGAR | +0.25% | +3.37% | |
| Form 8-K Columbia Financial, Inc. For: Jun 25 | SEC filing · Form 8-K | SEC EDGAR | +0.25% | +3.37% | |
| Columbia Financial, Inc. Announces Preliminary Subscription Offering Results and Increase in Maximum Purchase Limits | Press release | GlobeNewswire | -0.18% | -0.35% | |
| Columbia Financial, Inc. and Northfield Bancorp, Inc. Announce Mailing of Merger Consideration Election Materials and Deadline to Elect Preferred Form of Merger Consideration | Press release | GlobeNewswire | +0.43% | -0.53% | |
| Form 10-Q Columbia Financial, Inc. For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | +0.14% | -0.47% | |
| Form 10-Q/A Columbia Financial, Inc. For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | +0.74% | +2.07% | |
| Form DEFM14A Columbia Financial, Inc. | SEC filing · Form DEFM14A | SEC EDGAR | -0.10% | +0.15% | |
| Form 8-K Columbia Financial, Inc. For: May 11 | SEC filing · Form 8-K | SEC EDGAR | -0.25% | -0.41% | |
| Form EFFECT Columbia Financial, Inc. | SEC filing · Form EFFECT | SEC EDGAR | +0.00% | -1.23% | |
| Columbia Financial, Inc. Announces Commencement of Second-Step Conversion Offering; Receipt of Regulatory Approvals for the Conversion and the Acquisition of Northfield Bancorp, Inc. | Press release | GlobeNewswire | +0.00% | -1.23% | |
| Form 10-Q Columbia Financial, Inc. For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | +0.00% | -1.23% | |
| Form 8-K Columbia Financial, Inc. For: May 11 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -1.23% | |
| Form S-1/A Columbia Financial, Inc. | SEC filing · Form S-1 | SEC EDGAR | +0.28% | -0.05% | |
| Form S-4/A Columbia Financial, Inc. | SEC filing · Form S-4 | SEC EDGAR | +0.28% | -0.05% | |
| Form 10-K/A Columbia Financial, Inc. For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | -0.23% | +0.10% | |
| Form 8-K Columbia Financial, Inc. For: Apr 21 | SEC filing · Form 8-K | SEC EDGAR | +0.11% | +2.52% | |
| Form 8-K Columbia Financial, Inc. For: Apr 17 | SEC filing · Form 8-K | SEC EDGAR | +0.06% | +0.33% | |
| Columbia Financial, Inc. Announces Financial Results for the First Quarter Ended March 31, 2026 | Press release | GlobeNewswire | -0.22% | -0.03% | |
| Form 8-K Columbia Financial, Inc. For: Apr 20 | SEC filing · Form 8-K | SEC EDGAR | -0.22% | -0.03% | |
| Form S-1/A Columbia Financial, Inc. | SEC filing · Form S-1 | SEC EDGAR | -0.22% | -0.03% | |
| Form S-4/A Columbia Financial, Inc. | SEC filing · Form S-4 | SEC EDGAR | -0.22% | -0.03% | |
| Form 10-K Columbia Financial, Inc. For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | +0.28% | — | |
| Form S-1 Columbia Financial, Inc. | SEC filing · Form S-1 | SEC EDGAR | +0.28% | +0.06% | |
| Form S-4 Columbia Financial, Inc. | SEC filing · Form S-4 | SEC EDGAR | +0.28% | +0.06% | |
| Form 8-K Columbia Financial, Inc. For: Feb 09 | SEC filing · Form 8-K | SEC EDGAR | +0.16% | -0.33% | |
| Are DVN, STEL, CLBK, NFBK Obtaining Fair Deals for their Shareholders? | Press release | PR Newswire | +0.00% | +0.22% | |
| CLBK Stock Alert: Halper Sadeh LLC is Investigating Whether the Merger of Columbia Financial, Inc. is Fair to Shareholders | Press release | Business Wire | +7.93% | +1.72% | |
| Columbia Financial, Inc. and Northfield Bancorp, Inc. Announce Plans to Merge | Press release | GlobeNewswire | +7.93% | +1.72% | |
| Columbia Financial, Inc. Announces Financial Results for the Fourth Quarter and Year Ended December 31, 2025 | Press release | GlobeNewswire | +7.93% | +1.72% | |
| Form 8-K Columbia Financial, Inc. For: Feb 02 | SEC filing · Form 8-K | SEC EDGAR | +7.93% | +1.72% | |
| Form 8-K Columbia Financial, Inc. For: Jan 28 | SEC filing · Form 8-K | SEC EDGAR | +7.93% | +1.72% | |
| Form 8-K Columbia Financial, Inc. For: Jan 31 | SEC filing · Form 8-K | SEC EDGAR | +7.93% | +1.72% | |
| Halper Sadeh LLC Encourages CTRA, DVN, CLBK, NFBK Shareholders to Contact the Firm to Discuss Their Rights | Press release | PR Newswire | +0.20% | +1.43% | |
| Columbia Financial, Inc. Announces Promotion of Dennis E. Gibney to First Senior Executive Vice President and Chief Banking Officer | Press release | GlobeNewswire | +0.00% | +0.56% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the CLBK section they belong to.
Where else CLBK is measured.
CLBK earnings → · Analyst actions → · SEC filings →
Other Financial Services names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| BENEFICIAL BANCORP (BNCL) | 724 | 0.00% | 51% |
| ON DECK CAPITAL INC (ONDK) | 722 | +0.20% | 53% |
| PennyMac Financial Services, Inc. (PFSI) | 718 | +0.05% | 52% |
| FedNat Holding Company (FNHC) | 714 | +0.04% | 51% |
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 Financial Services names, measured the same way →
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How the numbers are made.
How is Columbia Financial, Inc.'s median reaction calculated?
Every labeled CLBK 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 718 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. 50% of CLBK'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 CLBK'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.