Old Second Bancorp, Inc. (OSBC)
OSBC moved a median of -0.06% 30 minutes after news, and -0.06% by the close. How OSBC actually reacts to news — the realized, point-in-time move the market made, measured across 298 labeled events over the last three years with zero look-ahead.
OSBC’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | -0.03% | 37% | 284 |
| 30-min | -0.06% | 42% | 298 |
| 60-min | -0.13% | 40% | 298 |
| to close | -0.06% | 47% | 297 |
| Middle 50% of OSBC reactions | -0.30% to +0.22% |
|---|---|
| Median reaction (30-min) | -0.06% |
| Measured reactions | 298 |
Half of all Old Second Bancorp, Inc. news events land between -0.30% and +0.22% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
How OSBC reacts, by analyst action.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Rating reiterations | 27 | +0.11% | 59% | +0.22% |
| Price-target raises | 10 | +0.01% | 50% | -0.51% |
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. 4 further classes were observed with fewer than 10 measured events and are not published. See how OSBC ranks against every other measured name →
That’s how OSBC usually reacts — get an email when it moves on news →Email me when OSBC moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to OSBC's baseline. Nothing else.
Recent OSBC events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Form 8-K OLD SECOND BANCORP INC For: Oct 01 | SEC filing · Form 8-K | SEC EDGAR | -0.12% | +1.74% | |
| O2 Sponsor Finance Hires Kyle Bucsa as Assistant Vice President | Press release | ACCESS Newswire | +0.02% | -0.65% | |
| O2 Sponsor Finance Hires Aaron Markos as Senior Vice President | Press release | ACCESS Newswire | -0.33% | -0.49% | |
| Form S-3ASR OLD SECOND BANCORP INC | SEC filing · Form S-3ASR | SEC EDGAR | -0.02% | -0.56% | |
| Form 10-Q OLD SECOND BANCORP INC For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.08% | +0.35% | |
| Form 8-K OLD SECOND BANCORP INC For: Jul 22 | SEC filing · Form 8-K | SEC EDGAR | -1.06% | +2.22% | |
| Old Second Bancorp, Inc. Reports Second Quarter 2026 Net Income of $28.2 Million, or $0.54 per Diluted Share | Press release | ACCESS Newswire | -1.06% | +2.22% | |
| Form 8-K OLD SECOND BANCORP INC For: Jul 21 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +0.77% | |
| Form 8-K OLD SECOND BANCORP INC For: Jul 07 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +0.27% | |
| Form 8-K OLD SECOND BANCORP INC For: Jul 01 | SEC filing · Form 8-K | SEC EDGAR | +0.06% | +0.30% | |
| O2 Sponsor Finance Promotes Chris Gallun to First Vice President | Press release | ACCESS Newswire | +0.02% | +0.43% | |
| Form 11-K OLD SECOND BANCORP INC For: Dec 31 | SEC filing · Form 11-K | SEC EDGAR | +0.04% | +0.47% | |
| Form 8-K OLD SECOND BANCORP INC For: Jun 25 | SEC filing · Form 8-K | SEC EDGAR | +0.09% | +0.35% | |
| Graf Joins Old Second National Bank | Press release | ACCESS Newswire | -0.11% | -0.97% | |
| Form 8-K OLD SECOND BANCORP INC For: Jun 05 | SEC filing · Form 8-K | SEC EDGAR | +0.14% | -0.54% | |
| O2 Sponsor Finance Provides Senior Secured Credit Facilities to Support Fort Point Capital in its Recapitalization of Boston Green | Press release | ACCESS Newswire | -0.10% | +0.72% | |
| Form 8-K OLD SECOND BANCORP INC For: May 19 | SEC filing · Form 8-K | SEC EDGAR | +0.19% | -0.76% | |
| Form 8-K OLD SECOND BANCORP INC For: May 19 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +0.48% | |
| Form 10-Q OLD SECOND BANCORP INC For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | -0.02% | -0.19% | |
| Form 8-K OLD SECOND BANCORP INC For: Apr 22 | SEC filing · Form 8-K | SEC EDGAR | +0.49% | -3.50% | |
| Old Second Bancorp, Inc. Reports First Quarter 2026 Net Income of $25.6 Million, or $0.48 per Diluted Share | Press release | ACCESS Newswire | +0.49% | -3.50% | |
| Form 8-K OLD SECOND BANCORP INC For: Apr 21 | SEC filing · Form 8-K | SEC EDGAR | -0.05% | -2.02% | |
| Form ARS OLD SECOND BANCORP INC For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | +0.10% | -0.14% | |
| Form DEF 14A OLD SECOND BANCORP INC For: May 19 | SEC filing · Form DEF | SEC EDGAR | +0.07% | +0.00% | |
| Form DEFA14A OLD SECOND BANCORP INC | SEC filing · Form DEFA14A | SEC EDGAR | +0.12% | +0.05% | |
| Form 8-K OLD SECOND BANCORP INC For: Apr 01 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -0.44% | |
| O2 Sponsor Finance provides $30MM Credit Facility to Support Borgman Capital's recapitalization of Gilman Cheese Corporation | Press release | ACCESS Newswire | +0.35% | +0.95% | |
| Form 8-K OLD SECOND BANCORP INC For: Mar 04 | SEC filing · Form 8-K | SEC EDGAR | — | -0.30% | |
| Form 10-K OLD SECOND BANCORP INC For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | -0.10% | -0.15% | |
| Form 8-K OLD SECOND BANCORP INC For: Jan 29 | SEC filing · Form 8-K | SEC EDGAR | -0.13% | +1.63% | |
| Form 8-K OLD SECOND BANCORP INC For: Jan 21 | SEC filing · Form 8-K | SEC EDGAR | -0.14% | -2.39% | |
| Old Second Bancorp, Inc. Reports Fourth Quarter 2025 Net Income of $28.8 Million, or $0.54 per Diluted Share | Press release | ACCESS Newswire | -0.14% | -2.39% | |
| Form 8-K OLD SECOND BANCORP INC For: Jan 20 | SEC filing · Form 8-K | SEC EDGAR | -0.07% | -0.68% | |
| Form TA-2 OLD SECOND BANCORP INC For: Dec 31 | SEC filing · Form TA-2 | SEC EDGAR | -0.20% | +2.15% | |
| Form 8-K OLD SECOND BANCORP INC For: Jan 02 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -0.46% | |
| O2 Sponsor Finance provides Senior Secured Credit Facilities to Support Paceline Equity Partners and Serata Capital Partners in their Acquisition of EventLink Group | Press release | ACCESS Newswire | +0.08% | -0.21% | |
| Form 10-Q OLD SECOND BANCORP INC For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | -0.14% | +0.55% | |
| Form 8-K OLD SECOND BANCORP INC For: Oct 22 | SEC filing · Form 8-K | SEC EDGAR | -2.68% | -0.34% | |
| Old Second Bancorp, Inc. Reports Third Quarter 2025 Net Income of $9.9 Million, or $0.18 per Diluted Share | Press release | ACCESS Newswire | -2.68% | -0.34% | |
| Form 8-K OLD SECOND BANCORP INC For: Oct 21 | SEC filing · Form 8-K | SEC EDGAR | +0.28% | +1.80% | |
| Old Second National Bank Completes Integration of Evergreen Bank Group, Expanding Access and Services for Customers | Press release | ACCESS Newswire | -0.35% | +3.44% | |
| Form 8-K OLD SECOND BANCORP INC For: Oct 01 | SEC filing · Form 8-K | SEC EDGAR | +0.17% | +1.40% | |
| Form 8-K/A OLD SECOND BANCORP INC For: Jul 01 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +1.66% | |
| Form 8-K OLD SECOND BANCORP INC For: Sep 14 | SEC filing · Form 8-K | SEC EDGAR | -0.19% | -0.96% | |
| O2 Sponsor Finance Provides Senior Secured Credit Facilities to Support San Francisco Equity Partners in its Acquisition of Formula Corp | Press release | ACCESS Newswire | +0.00% | +0.82% | |
| Form 10-Q OLD SECOND BANCORP INC For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.12% | +0.12% | |
| Form 8-K OLD SECOND BANCORP INC For: Jul 23 | SEC filing · Form 8-K | SEC EDGAR | -2.12% | -3.32% | |
| Old Second Bancorp, Inc. Reports Second Quarter 2025 Net Income of $21.8 Million, or $0.48 per Diluted Share | Press release | ACCESS Newswire | -2.12% | -3.32% | |
| Form 8-K OLD SECOND BANCORP INC For: Jul 15 | SEC filing · Form 8-K | SEC EDGAR | +0.05% | -2.13% | |
| Form 8-K OLD SECOND BANCORP INC For: Jul 02 | SEC filing · Form 8-K | SEC EDGAR | -0.13% | +0.91% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the OSBC section they belong to.
Where else OSBC is measured.
OSBC earnings → · Analyst actions → · SEC filings →
Other Financial Services names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| UNIVERSAL INSURANCE HOLDINGS INC (UVE) | 299 | +0.14% | 53% |
| Cullen/Frost Bankers, Inc. (CFR) | 298 | -0.07% | 40% |
| STANDARD AVB FINANCIAL CORP COMMON (STND) | 298 | 0.00% | 26% |
| BancFirst Corporation (BANF) | 297 | -0.03% | 47% |
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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Every name we’ve measured, in one place.
How the numbers are made.
How is Old Second Bancorp, Inc.'s median reaction calculated?
Every labeled OSBC 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 298 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. 42% of OSBC'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 OSBC'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.