SEC filings / CIK 357173
OLD SECOND BANCORP INC
State commercial banks, IL. 15 10-K filer-years in this dataset, the most recent for FY2025, filed Feb 26, 2026. Every figure below is as filed by the company and untouched: FinObservatory has not restated, rescaled or corrected anything, and a blank is a fact the filing does not tag, not a zero.
This is the SEC holding company, identified by its Central Index Key. It is not the insured bank subsidiary that appears in /banks and /deposits, which are FDIC call-report entities on a different consolidation. Nothing here should be compared line for line with those.
Filing history, as filed
| FY | Filed | Assets | Deposits | Equity | AOCI | HTM carrying | HTM fair value | Gap, % of equity | Custom facts |
|---|---|---|---|---|---|---|---|---|---|
| 2025p | Feb 26, 2026 | $6.90bn | $5.60bn | $896.8m | -$28.7m | n/a | n/a | n/a | 19.3% |
| 2024 | Mar 6, 2025 | $5.65bn | $4.77bn | $671.0m | -$47.7m | n/a | n/a | n/a | 19.3% |
| 2023 | Mar 7, 2024 | $5.72bn | $4.57bn | $577.3m | -$62.8m | n/a | n/a | n/a | 17.6% |
| 2022 | Mar 9, 2023 | $5.89bn | $5.11bn | $461.1m | -$93.1m | n/a | n/a | n/a | 15.8% |
| 2021 | Mar 10, 2022 | $6.21bn | $5.47bn | $502.0m | $8.8m | n/a | n/a | n/a | 17.0% |
| 2020 | Mar 8, 2021 | $3.04bn | $2.54bn | $307.1m | $14.8m | n/a | n/a | n/a | 17.1% |
| 2019 | Mar 6, 2020 | $2.64bn | $2.13bn | $277.9m | $4.6m | n/a | n/a | n/a | 16.0% |
| 2018 | Mar 7, 2019 | $2.68bn | $2.12bn | $229.1m | -$4.1m | n/a | n/a | n/a | 14.5% |
| 2017 | Mar 13, 2018 | $2.38bn | $1.92bn | $200.3m | $1.5m | n/a | n/a | n/a | 14.0% |
| 2016 | Mar 13, 2017 | $2.25bn | $1.87bn | $175.2m | -$8.8m | n/a | n/a | n/a | 16.2% |
| 2015 | Mar 11, 2016 | $2.08bn | $1.76bn | $155.9m | -$12.7m | $247.7m | n/a | n/a | 17.6% |
| 2014 | Mar 12, 2015 | $2.06bn | $1.69bn | $194.2m | -$7.7m | $259.7m | n/a | n/a | 16.9% |
| 2013 | Feb 26, 2014 | $2.00bn | $1.68bn | $147.7m | -$7.0m | $256.6m | n/a | n/a | 12.5% |
| 2012 | Mar 20, 2013 | $2.05bn | $1.72bn | $72.6m | -$1.3m | n/a | n/a | n/a | 11.0% |
| 2011 | Mar 15, 2012 | $1.94bn | $1.74bn | $74.0m | -$3.7m | n/a | n/a | n/a | 7.3% |
ext marks a carrying amount tagged with a company-invented element. p marks FY2025, which the dataset’s filing window (closing Mar 31, 2026) leaves incomplete across filers. “Custom facts” is the share of that filing’s consolidated facts carrying a company-invented tag, in any unit.
Source: SEC Financial Statement Data Sets, US Securities and Exchange Commission, Division of Economic and Risk Analysis. Facts as filed: uncleaned, unrestated, not audited by FinObservatory. Selection: this company's 10-K submissions with prevrpt = 0, one per fiscal year by latest filed date; consolidated USD instants at each filing's period end. Dollar columns are raw US dollars. Methodology
What this page cannot tell you
- A blank in the held-to-maturity columns means the filing does not tag that fact on the consolidated face. It does not mean the company holds no held-to-maturity securities, and this dataset cannot distinguish the two.
- A held-to-maturity gap is not a realised loss. Held to maturity, the securities pay par. The gap measures how far the reported equity sits from a mark-to-market equity, which becomes a solvency question only if the book must be sold.
- AOCI is not the held-to-maturity mark. It bundles available-for-sale marks, hedge marks, pension and translation, net of tax. Do not add the two columns.
- Every value is as filed. A scale error, sign error or mis-tag by the company is reproduced here exactly as the company made it.
Pages exist for the 650 bank and thrift holding companies with at least one 10-K from FY2015 onward, out of 900 with a 10-K anywhere in the dataset.