Old Second Bancorp

OSBC • NASDAQ

Old Second Bancorp is a banks - regional company in the financial services sector on NASDAQ, led by James L. Eccher, with a market cap of $1.1B. As of Q3 2025, 69% of shares are held by 196 institutional investors, with BlackRock, Inc. as the largest holder at 7.25%.

Chairman, President and Chief Executive OfficerJames L. Eccher

Market Cap$1.1B

Banks - Regional

Financial Services

Employees834.0

Websiteoldsecond.com

Country

United States of America

Overview

Overview of institutional ownership in OSBC as of Q3 2025 with a market cap of $910.1M

All Institutions

Institutions: 196
Value Held: $624.7M
Shares Held: 36.1M
Avg Position: $3.2M
Median Position: $540.6K

Hedge Funds

Hedge Funds: 34
Value Held: $97.4M
Shares Held: 5.6M
Avg Position: $2.9M
Median Position: $780.4K

Ownership Breakdown

Institutional (non-HF)

57.95%

$527.3M

Hedge Funds

10.7%

$97.4M

Retail & Other

31.35%

$285.3M

Based on market cap of $910.1M as of Q3 2025. Institutional (non-HF) excludes hedge funds to avoid double counting.

Biggest Investors

Institutions with the largest positions in OSBC as of Q3 2025

Institution	Key People	Position Value	Ownership	Owned Since	Total AUM (Long)
B BlackRock, Inc. Institution	-	$66.0M 0.00% of portfolio	7.25% 3.8M shares	Q1 2016 Held for 9y 8m	$5.67T
VANGUARD GROUP INC Institution	Salim Ramji CEO	$56.5M 0.00% of portfolio	6.21% 3.3M shares	≤ Q2 2013 Held for 12y 5m+	$6.69T
DIMENSIONAL FUND ADVISORS LP Long Only Manager	David Paul Butler CEO	$38.1M 0.01% of portfolio	4.19% 2.2M shares	≤ Q2 2013 Held for 12y 5m+	$466.32B
FJ Capital Management LLC Hedge Fund•Long/Short	Martin Saul Friedman Founder	$33.2M 3.32% of portfolio	3.65% 1.9M shares	Q2 2014 Held for 11y 5m	$999.9M
GOLDMAN SACHS GROUP INC Institution	David M. Solomon CEO	$26.9M 0.00% of portfolio	2.96% 1.6M shares	Q1 2016 Held for 9y 8m	$691.34B
D Davis Asset Management, L.P. Institution	-	$25.9M 0.95% of portfolio	2.85% 1.5M shares	Q2 2024 Held for 1y 5m	$2.7B
A AMERICAN CENTURY COMPANIES INC Institution	-	$24.0M 0.01% of portfolio	2.64% 1.4M shares	Q1 2020 Held for 5y 8m	$195.93B
STATE STREET CORP Institution	Ronald P. O'Hanley CEO	$23.6M 0.00% of portfolio	2.60% 1.4M shares	Q2 2015 Held for 10y 5m	$2.88T
GEODE CAPITAL MANAGEMENT LLC ETF Provider	David Kenneth Lane CEO	$23.6M 0.00% of portfolio	2.59% 1.4M shares	≤ Q2 2013 Held for 12y 5m+	$1.57T
KENNEDY CAPITAL MANAGEMENT, INC. Long Only Manager	Donald M Cobin CEO	$18.9M 0.42% of portfolio	2.08% 1.1M shares	Q4 2017 Held for 7y 11m	$4.5B

Net Capital Flow

Institutional buying and selling activity for OSBC in Q3 2025

Traded: +$60.3M
Buyers: 115
Sellers: 66
Total Bought: +$81.8M
Total Sold: −$21.6M
Avg Position: $2.9M

Biggest Buyers

Institution	Net Bought	Current Position
NORTHERN TRUST CORP Institution	+$10.1M +583.5K shares	$17.2M 997.9K shares
VANGUARD GROUP INC Institution	+$9.6M +553.2K shares	$56.5M 3.3M shares
River Street Advisors LLC RIA/Wealth	+$6.6M +383.9K shares	$6.6M 383.9K shares
B BlackRock, Inc. Institution	+$5.5M +316.2K shares	$66.0M 3.8M shares
GEODE CAPITAL MANAGEMENT LLC ETF Provider	+$3.7M +211.8K shares	$23.6M 1.4M shares
BANK OF MONTREAL /CAN/ Institution	+$3.1M +179.4K shares	$3.1M 179.4K shares
GOLDMAN SACHS GROUP INC Institution	+$2.8M +163.4K shares	$26.9M 1.6M shares
A AMERICAN CENTURY COMPANIES INC Institution	+$2.8M +160.4K shares	$24.0M 1.4M shares
BANK OF AMERICA CORP /DE/ Institution	+$2.7M +156.0K shares	$6.1M 354.4K shares
B BLAIR WILLIAM & CO/IL Institution	+$2.4M +136.4K shares	$2.7M 154.4K shares

Biggest Sellers

Institution	Net Sold	Current Position
B BANC FUNDS CO LLC Institution	−$2.6M −151.0K shares	$17.4M 1.0M shares
UBS GLOBAL ASSET MANAGEMENT AMERICAS INC Long Only Manager	−$1.3M −75.9K shares	$899.2K 52.0K shares
JPMORGAN CHASE & CO Institution	−$1.2M −69.9K shares	$13.5M 780.0K shares
MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy	−$1.0M −57.4K shares	Sold Off 0 shares
ARP AMERICAS LLC Hedge Fund•Multi-Strategy	−$995.6K −56.1K shares	Sold Off 0 shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	−$964.5K −55.8K shares	$194.9K 11.3K shares
J Jump Financial, LLC Institution	−$669.1K −37.7K shares	Sold Off 0 shares
MORGAN STANLEY RIA/Wealth	−$606.9K −35.1K shares	$5.4M 309.9K shares
PANAGORA ASSET MANAGEMENT INC Hedge Fund•Quant	−$603.6K −34.9K shares	$363.0K 21.0K shares
RENAISSANCE TECHNOLOGIES LLC Hedge Fund•Quant	−$580.8K −33.6K shares	$849.1K 49.1K shares

Entry and Exit Activity

Institutions that initiated new positions or completely exited OSBC in Q3 2025

New Positions: 17
New Value: $7.6M
Exited Positions: 16
Exited Value: $6.2M

New Positions

Institution	Position Value
S Sara-Bay Financial RIA/Wealth	$1.7M 99.1K shares
J JCSD Capital, LLC Hedge Fund•Sector	$1.3M 75.1K shares
CenterBook Partners LP Hedge Fund•Market Neutral	$791.6K 45.8K shares
C CI Private Wealth, LLC RIA/Wealth	$704.4K 40.8K shares
4WEALTH ADVISORS, INC. RIA/Wealth	$580.1K 33.6K shares
G GAMCO INVESTORS, INC. ET AL Institution	$565.6K 32.7K shares
M MQS Management LLC Hedge Fund•Global Macro	$547.1K 31.7K shares
B Brevan Howard Capital Management LP Institution	$296.4K 17.2K shares
Cetera Investment Advisers RIA/Wealth	$273.7K 15.8K shares
Kestra Advisory Services, LLC RIA/Wealth	$255.9K 14.8K shares

Exited Positions

Institution	Previous Position
MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy	$1.0M 57.4K shares
ARP AMERICAS LLC Hedge Fund•Multi-Strategy	$995.6K 56.1K shares
J Jump Financial, LLC Institution	$669.1K 37.7K shares
BALYASNY ASSET MANAGEMENT LLC Hedge Fund•Multi-Strategy	$434.0K 24.5K shares
M Man Group plc Institution	$425.8K 24.0K shares
Jackson Creek Investment Advisors LLC Long Only Manager	$416.3K 23.5K shares
Mach-1 Financial Group, Inc. RIA/Wealth	$336.2K 19.0K shares
Connor, Clark & Lunn Investment Management Ltd. Long Only Manager	$281.3K 15.9K shares
A Assenagon Asset Management S.A. Institution	$271.1K 15.3K shares
ING INVESTMENT MANAGEMENT LLC Insurance Manager	$251.0K 14.1K shares

Options Activity

Institutions with the largest Call and Put options positions in OSBC as of Q3 2025

Call Positions: 1
Call Value: $487.6K
Put Positions: 0
Put Value: -

Call Positions

Institution	Position Value
J JCSD Capital, LLC Hedge Fund•Sector	$487.6K 282.0 contracts

Put Positions

Institution	Position Value
No put positions found

Most Committed Institutions

Institutions with OSBC as the highest % of their portfolio as of Q3 2025

Institution	Key People	Portfolio Weight	Ownership	Owned Since	Total AUM (Long)
JACOBS ASSET MANAGEMENT, LLC Hedge Fund•Long/Short	Seymour Murray Jacobs Managing Partner	4.53% $8.3M	0.91% 478.2K shares	Q1 2024 Held for 1y 8m	$182.7M
B BANC FUNDS CO LLC Institution	-	4.23% $17.4M	1.91% 1.0M shares	≤ Q2 2013 Held for 12y 5m+	$411.3M
FJ Capital Management LLC Hedge Fund•Long/Short	Martin Saul Friedman Founder	3.32% $33.2M	3.65% 1.9M shares	Q2 2014 Held for 11y 5m	$999.9M
River Street Advisors LLC RIA/Wealth	Richard A. Gartelmann CEO	2.77% $6.6M	0.73% 383.9K shares	Q4 2024 Held for 11 months	$239.6M
S Stieven Capital Advisors, L.P. Hedge Fund•Long/Short	Joseph Albert Stieven Managing Partner	2.54% $13.4M	1.48% 778.0K shares	Q2 2014 Held for 11y 5m	$530.5M
J JCSD Capital, LLC Hedge Fund•Sector	Daniel Joseph Tachiera CCO	2.31% $1.3M	0.14% 75.1K shares	Q3 2025 Held for 2 months	$56.3M
Elizabeth Park Capital Advisors, Ltd. Hedge Fund•Long/Short	Fred Anthony Cummings President	2.18% $2.7M	0.30% 158.7K shares	Q3 2024 Held for 1y 2m	$126.0M
E EJF Capital LLC Institution	-	1.72% $3.0M	0.33% 173.8K shares	Q4 2021 Held for 3y 11m	$174.8M
Siena Capital Management, LLC Hedge Fund•Sector	Daniel Kanter President	1.69% $2.8M	0.31% 163.0K shares	Q4 2021 Held for 3y 11m	$167.0M
PMC FIG Opportunities LLC Real Assets	John Charles Finch CEO	1.57% $977.8K	0.11% 56.6K shares	Q3 2025 Held for 2 months	$62.5M