OSBC - CIK 0000357173
As of 2026-06-10, OLD SECOND BANCORP INC (OSBC) has a market capitalization of $1.14 B, making it the #2539 most valuable US-listed company.
| Date | Market cap |
|---|---|
| 2026-06-10 | $1.14 B |
| 2026-05-29 | $1.10 B |
| 2026-05-28 | $1.09 B |
| 2026-05-26 | $1.09 B |
| 2026-05-25 | $1.08 B |
| 2026-05-24 | $1.08 B |
| 2026-05-22 | $1.08 B |
Readings accumulate daily as market data refreshes, combining SEC-reported share counts with live prices.
As of 2026-06-10, OLD SECOND BANCORP INC (OSBC) has a market capitalization of $1.14 B, making it the #2539 most valuable US-listed company.
OLD SECOND BANCORP INC is the #2539 largest US-listed company by market capitalization.
Data parsed from SEC EDGAR XBRL filings. See the full market cap rankings.