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OSBC

Nasdaq

Old Second Bancorp, Inc. - Common Stock

SEC Company: CIK 0000357173 →

SEC Ticker Form: OSBC

Listing (Nasdaq Trader)

Symbol Directory: OSBC →

Listing ExchangeNasdaq (Q)

Market CategoryGlobal Select (Q)

ETFNo

Round Lot Size100 shares

Financial StatusNormal (N)

Test IssueNo

Listing Since2026-09-20 05:30:00 UTC

SEC Ticker EquivalentOSBC

SEC Entity: View SEC Company Profile (CIK 0000357173) →

Regulatory Flags (Nasdaq Trader)

Symbol: OSBC

SEC Regulation SHO Threshold Security Days

Securities with persistent aggregate fail-to-deliver positions exceeding SEC Rule 203(c)(6) thresholds.

Days on List (Last 90 Trading Days)0 days

Total Historical Threshold Days30 days

First Seen on Threshold List2008-07-23

Most Recent Threshold Date2008-09-22

Rule 201 Short Sale Circuit Breakers Triggered

Alternative uptick rule (Rule 201) triggered by a ≥10% price decline from previous day's close (most recent first, up to 50 triggers).

Trade Date	Trigger Time (ET)
2023-03-14	2023-03-13T09:32:51
2023-03-13	2023-03-13T09:32:51
2022-07-29	2022-07-28T10:04:16
2022-07-28	2022-07-28T10:04:16
2020-04-24	2020-04-23T09:30:01
2020-04-23	2020-04-23T09:30:01
2020-04-17	2020-04-16T13:08:52
2020-04-16	2020-04-16T13:08:52
2020-04-14	2020-04-13T09:35:39
2020-04-13	2020-04-13T09:35:39
2020-04-02	2020-04-01T13:28:42
2020-04-01	2020-04-01T13:28:42
2020-03-24	2020-03-23T10:06:25
2020-03-23	2020-03-20T11:53:37
2020-03-20	2020-03-19T11:43:10
2020-03-19	2020-03-18T12:39:04
2020-03-18	2020-03-18T12:39:04
2020-03-17	2020-03-16T15:44:52
2020-03-16	2020-03-16T15:44:52
2020-03-13	2020-03-12T09:30:01
2020-03-12	2020-03-12T09:30:01
2020-03-10	2020-03-09T09:30:12
2020-03-09	2020-03-09T09:30:12
2018-12-26	2018-12-24T09:34:53
2018-12-24	2018-12-24T09:34:53
2013-10-31	2013-10-30T09:48:03
2013-10-30	2013-10-30T09:48:03
2013-07-30	2013-07-29T15:41:51
2013-07-29	2013-07-29T15:41:51
2013-05-22	2013-05-21T11:32:00
2013-05-21	2013-05-21T11:32:00
2013-03-07	2013-03-06T11:16:08
2013-03-06	2013-03-06T11:16:08
2013-03-01	2013-02-28T11:38:18
2013-02-28	2013-02-28T11:38:18
2013-02-19	2013-02-15T12:21:32
2013-02-15	2013-02-14T13:53:03
2013-02-14	2013-02-14T13:53:03
2013-01-24	2013-01-23T11:17:42
2013-01-23	2013-01-23T11:17:42
2012-12-27	2012-12-26T13:05:58
2012-12-26	2012-12-26T13:05:58
2012-12-03	2012-11-30T11:29:22
2012-11-30	2012-11-30T11:29:22
2012-11-01	2012-10-31T10:17:13
2012-10-31	2012-10-31T10:17:13
2012-09-25	2012-09-24T14:07:15
2012-09-24	2012-09-24T14:07:15
2012-06-25	2012-06-22T15:28:36
2012-06-22	2012-06-22T15:28:36

Nasdaq Trader Listing Event History

2 events recorded

Date	Source	Event Kind	Description
2008-01-05	https://web.archive.org/web/20080105054058/http://www.nasdaqtrader.com:80/dynamic/symdir/nasdaqlisted.txt	ARCHIVED	Listed in archived Nasdaq Trader symbol directory (Wayback Machine snapshot; listing date on or before)
2026-09-20	nasdaqtraded.txt	FIRST_CAPTURE	Already listed on Nasdaq (Global Select) at first daily capture

Nasdaq Trader daily captures since 2026-09-20