Old Second Bancorp Ownership

Who are the major shareholders and have insiders been buying or selling?

Recent Insider Transactions

NasdaqGS:OSBC Recent Insider Transactions by Companies or Individuals
Date	Value	Name	Entity	Shares	Max Price
22 May 26	SellUS$108,134	Gary Collins	Individual	5,120	US$21.12
21 May 26	SellUS$211,200	Gary Collins	Individual	10,000	US$21.12
11 May 26	BuyUS$502	Billy Lyons	Individual	24	US$20.90
11 May 26	SellUS$518,795	Donald Pilmer	Individual	25,000	US$20.75
08 May 26	SellUS$318,525	Gary Collins	Individual	15,000	US$21.24
20 Mar 26	SellUS$429,435	Gary Collins	Individual	22,154	US$19.38
18 Feb 26	SellUS$732,900	Darin Campbell	Individual	35,000	US$20.94
13 Feb 26	SellUS$1,884	Darin Campbell	Individual	91	US$20.70
05 Feb 26	SellUS$41,950	Richard Gartelmann	Individual	2,000	US$20.98
15 Jan 26	SellUS$99,756	John Ladowicz	Individual	4,762	US$20.96
09 Dec 25	SellUS$250,000	John Ladowicz	Individual	12,500	US$20.00
26 Nov 25	SellUS$249,991	John Ladowicz	Individual	13,150	US$19.01
31 Oct 25	SellUS$1,039,642	Darin Campbell	Individual	57,565	US$18.27

Insider Trading Volume

Insider Buying: OSBC insiders have only sold shares in the past 3 months.

Ownership Breakdown

What is the ownership structure of OSBC?
Owner Type	Number of Shares	Ownership Percentage
Individual Insiders	1,761,966	3.46%
General Public	10,253,321	20.2%
Institutions	38,860,429	76.4%

Dilution of Shares: Shareholders have not been meaningfully diluted in the past year.

Top Shareholders

Top 25 shareholders own 59.02% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
8.45%	BlackRock, Inc.	4,298,683	US$108.3m	4.18%	no data
4.96%	Vanguard Capital Management, LLC	2,521,077	US$63.5m	-2.56%	no data
4.91%	Dimensional Fund Advisors LP	2,498,671	US$63.0m	4.6%	0.01%
3.62%	State Street Investment Management	1,839,202	US$46.3m	15%	no data
3.54%	Davis Capital Partners, LLC	1,800,000	US$45.4m	0%	1.13%
3.51%	American Century Investment Management Inc	1,783,820	US$45.0m	12.1%	0.02%
2.87%	FJ Capital Management, LLC	1,460,413	US$36.8m	-2.97%	4.67%
2.78%	Boston Partners Global Investors, Inc.	1,415,165	US$35.7m	-1.99%	0.02%
2.65%	Geode Capital Management, LLC	1,349,432	US$34.0m	5.26%	no data
2.43%	Kennedy Capital Management LLC	1,236,983	US$31.2m	-2.48%	0.56%
2.03%	Banc Funds Company, L.L.C.	1,034,143	US$26.1m	0.49%	4.25%
1.83%	Goldman Sachs Asset Management, L.P.	931,563	US$23.5m	2.88%	no data
1.72%	Manulife Asset Management	872,651	US$22.0m	-0.69%	0.01%
1.61%	Vanguard Portfolio Management, LLC	819,368	US$20.6m	15%	no data
1.6%	Stieven Capital Advisors, L.P.	815,328	US$20.5m	5.4%	3.95%
1.53%	River Street Advisors, LLC	779,008	US$19.6m	4.33%	5.76%
1.36%	The Goldman Sachs Group, Inc.	693,289	US$17.5m	-11.8%	no data
1.26%	AllianceBernstein L.P.	641,845	US$16.2m	-7.09%	no data
1.09%	Northern Trust Global Investments	555,408	US$14.0m	-27.3%	no data
1.07%	Wellington Management Group LLP	544,345	US$13.7m	-36.5%	no data
1.01%	JP Morgan Asset Management	511,605	US$12.9m	-21.3%	no data
0.89%	Bridgeway Capital Management, LLC	453,323	US$11.4m	-32.5%	0.2%
0.85%	Charles Schwab Investment Management, Inc.	431,304	US$10.9m	0.09%	no data
0.73%	AQR Capital Management, LLC	372,899	US$9.4m	-1.41%	no data
0.72%	Nuveen Investments, Inc.	365,169	US$9.2m	5.29%	0.02%

Company Analysis and Financial Data Status

Data	Last Updated (UTC time)
Company Analysis	2026/08/21 21:56
End of Day Share Price	2026/08/21 00:00
Earnings	2026/06/30
Annual Earnings	2025/12/31

Data Sources

The data used in our company analysis is from S&P Global Market Intelligence LLC. The following data is used in our analysis model to generate this report. Data is normalised which can introduce a delay from the source being available.

Package	Data	Timeframe	Example US Source ^*
Company Financials	10 years	Income statement Cash flow statement Balance sheet	SEC Form 10-K SEC Form 10-Q
Analyst Consensus Estimates	+3 years	Forecast financials Analyst price targets	Analyst Research Reports Blue Matrix
Market Prices	30 years	Stock prices Dividends, Splits and Actions	ICE Market Data SEC Form S-1
Ownership	10 years	Top shareholders Insider trading	SEC Form 4 SEC Form 13D
Management	10 years	Leadership team Board of directors	SEC Form 10-K SEC Form DEF 14A
Key Developments	10 years	Company announcements	SEC Form 8-K

^* Example for US securities, for non-US equivalent regulatory forms and sources are used.

Unless specified all financial data is based on a yearly period but updated quarterly. This is known as Trailing Twelve Month (TTM) or Last Twelve Month (LTM) Data. Learn more.

Analysis Model and Snowflake

Details of the analysis model used to generate this report is available on our Github page, we also have guides on how to use our reports and tutorials on Youtube.

Learn about the world class team who designed and built the Simply Wall St analysis model.

Industry and Sector Metrics

Our industry and section metrics are calculated every 6 hours by Simply Wall St, details of our process are available on Github.

Analyst Sources

Old Second Bancorp, Inc. is covered by 11 analysts. 6 of those analysts submitted the estimates of revenue or earnings used as inputs to our report. Analysts submissions are updated throughout the day.

Analyst	Institution
null null	D.A. Davidson & Co.
Jeffrey Rulis	D.A. Davidson & Co.
David Konrad	Keefe, Bruyette, & Woods