Old Second Bancorp Ownership

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

Recent Insider Transactions

DB:OSB Recent Insider Transactions by Companies or Individuals
Date	Value	Name	Entity	Shares	Max Price
22 May 26	Sell€93,223	Gary Collins	Individual	5,120	€18.21
21 May 26	Sell€182,287	Gary Collins	Individual	10,000	€18.23
11 May 26	Buy€426	Billy Lyons	Individual	24	€17.74
11 May 26	Sell€440,249	Donald Pilmer	Individual	25,000	€17.61
08 May 26	Sell€270,619	Gary Collins	Individual	15,000	€18.05
20 Mar 26	Sell€371,376	Gary Collins	Individual	22,154	€16.76
18 Feb 26	Sell€620,253	Darin Campbell	Individual	35,000	€17.72
13 Feb 26	Sell€1,587	Darin Campbell	Individual	91	€17.44
05 Feb 26	Sell€35,578	Richard Gartelmann	Individual	2,000	€17.79
15 Jan 26	Sell€85,930	John Ladowicz	Individual	4,762	€18.05
09 Dec 25	Sell€214,800	John Ladowicz	Individual	12,500	€17.18
26 Nov 25	Sell€215,592	John Ladowicz	Individual	13,150	€16.39
31 Oct 25	Sell€901,370	Darin Campbell	Individual	57,565	€15.84

Insider Trading Volume

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

Ownership Breakdown

What is the ownership structure of OSB?
Owner Type	Number of Shares	Ownership Percentage
Individual Insiders	1,761,966	3.46%
General Public	10,207,848	20.1%
Institutions	38,905,902	76.5%

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

Top Shareholders

Top 25 shareholders own 60.37% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
8.45%	BlackRock, Inc.	4,298,683	€95.9m	4.18%	no data
4.96%	Vanguard Capital Management, LLC	2,521,077	€56.3m	-2.56%	no data
4.91%	Dimensional Fund Advisors LP	2,498,671	€55.8m	4.6%	0.01%
3.62%	State Street Investment Management	1,839,202	€41.0m	15%	no data
3.54%	Davis Capital Partners, LLC	1,800,000	€40.2m	0%	1.11%
3.51%	American Century Investment Management Inc	1,783,820	€39.8m	12.1%	0.02%
2.96%	FJ Capital Management, LLC	1,505,102	€33.6m	-17.7%	3.94%
2.78%	Boston Partners Global Investors, Inc.	1,415,165	€31.6m	-1.99%	0.02%
2.65%	Geode Capital Management, LLC	1,349,432	€30.1m	5.26%	no data
2.49%	Kennedy Capital Management LLC	1,268,490	€28.3m	0.11%	0.57%
2.03%	Banc Funds Company, L.L.C.	1,034,143	€23.1m	0.49%	4.24%
1.78%	Goldman Sachs Asset Management, L.P.	905,489	€20.2m	21.2%	no data
1.73%	Manulife Asset Management	878,670	€19.6m	-1.48%	0.01%
1.69%	Wellington Management Group LLP	857,785	€19.1m	-11.5%	no data
1.61%	Vanguard Portfolio Management, LLC	819,368	€18.3m	15%	no data
1.55%	The Goldman Sachs Group, Inc.	786,034	€17.5m	0%	0.01%
1.53%	River Street Advisors, LLC	779,008	€17.4m	4.33%	5.72%
1.52%	Stieven Capital Advisors, L.P.	773,528	€17.3m	-0.33%	3.54%
1.36%	AllianceBernstein L.P.	690,845	€15.4m	0.7%	no data
1.32%	Bridgeway Capital Management, LLC	671,814	€15.0m	3.72%	0.2%
1.09%	Northern Trust Global Investments	555,408	€12.4m	-27.3%	no data
1.01%	JP Morgan Asset Management	511,605	€11.4m	-21.3%	no data
0.85%	Charles Schwab Investment Management, Inc.	430,910	€9.6m	0%	no data
0.74%	AQR Capital Management, LLC	378,220	€8.4m	-12.9%	no data
0.71%	Gator Capital Management, LLC	359,730	€8.0m	2.35%	1.89%

Company Analysis and Financial Data Status

Data	Last Updated (UTC time)
Company Analysis	2026/08/18 15:51
End of Day Share Price	2026/08/18 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