Old Second Bancorp Ownership | Who Owns Old Second Bancorp?

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Old Second Bancorp Ownership Summary

Old Second Bancorp is owned by 72.16% institutional investors, 4.73% insiders, and 23.11% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 7.79% of OSBC shares. Vanguard US Total Market Shares ETF is the top mutual fund, with 3.04% of its assets in Old Second Bancorp shares.

OSBC Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Old Second Bancorp	72.16%	4.73%	23.11%
Sector	Financial Services Stocks	51.64%	15.54%	32.82%
Industry	Regional Banks Stocks	53.95%	12.38%	33.68%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock funding, inc. /de	3.50M	7.79%	$62.12M
Blackrock	3.44M	7.68%	$50.90M
Vanguard group	2.64M	5.88%	$46.90M
Dimensional fund advisors lp	2.02M	4.50%	$35.91M
Fj capital management	1.84M	4.09%	$32.59M
Davis asset management	1.38M	3.08%	$24.56M
American century companies	1.23M	2.73%	$21.78M
State street	1.19M	2.65%	$17.58M
Banc funds	1.16M	2.57%	$20.53M
Jpmorgan chase	1.07M	2.38%	$19.01M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Jacobs asset management	462.50K	4.68%	$8.20M
Fj capital management	1.84M	3.46%	$32.59M
Banc funds	1.16M	3.10%	$20.53M
River street advisors	383.95K	2.57%	$6.64M
Stieven capital advisors	717.03K	2.48%	$12.72M
Elizabeth park capital advisors	151.30K	2.41%	$2.68M
Ejf capital	143.29K	2.02%	$2.54M
Gator capital management	332.95K	1.83%	$5.91M
Jcsd capital	75.10K	1.11%	$1.30M
Davis asset management	1.38M	0.96%	$24.56M

Top Buyers

Holder	Shares	% Assets	Change
Kennedy capital management	996.99K	0.42%	481.30K
River street advisors	383.95K	2.57%	383.95K
Davis asset management	1.38M	0.96%	284.50K
Millennium management	308.22K	0.00%	252.43K
Nuveen asset management	281.57K	0.00%	183.87K

Top Sellers

Holder	Shares	% Assets	Change
Boothbay fund management	-	-	-342.21K
Aptus capital advisors	-	-	-286.89K
Banc funds	1.16M	3.10%	-127.20K
Adage capital partners gp	-	-	-100.00K
Thrivent financial for lutherans	-	-	-98.14K

New Positions

Holder	Shares	% Assets	Change	Value
Sara-bay financial	99.06K	0.48%	99.06K	$1.71M
Jcsd capital	75.10K	1.11%	75.10K	$1.30M
Versor investments lp	56.12K	0.18%	56.12K	$995.64K
Skylands capital	24.10K	0.06%	24.10K	$427.53K
Jackson creek investment advisors	23.46K	0.11%	23.46K	$416.00K

Sold Out

Holder	Change
Tfc financial management	-1.00
Nelson, van denburg & campbell wealth management group	-9.00
Massmutual trust co fsb/adv	-19.00
Smartleaf asset management	-20.00
Stephens consulting	-25.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Jun 30, 2025	181	-5.73%	32,449,598	-1.08%	72	1.36%	87	6.10%	66	-7.04%
Mar 31, 2025	192	6.67%	32,815,678	1.68%	72	1.41%	83	-18.63%	71	65.12%
Dec 31, 2024	74	-57.71%	11,733,217	-62.96%	26	0.52%	38	-61.22%	15	-69.39%
Sep 30, 2024	175	13.64%	31,673,483	3.14%	70	1.51%	98	15.29%	49	16.67%
Jun 30, 2024	153	-	30,709,365	2.63%	68	1.54%	84	16.67%	42	-22.22%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard US Total Market Shares ETF	1.37M	3.04%	-
Vanguard Total Stock Mkt Idx Inv	1.34M	2.98%	-29.79K
Avantis US Small Cap Value ETF	1.07M	2.03%	3.29K
iShares Russell 2000 ETF	1.06M	2.02%	-
Vanguard Institutional Extnd Mkt Idx Tr	484.39K	1.08%	-211.62K
Kennedy Small Cap Value	434.29K	0.96%	434.29K
JHancock Regional Bank A	468.90K	0.89%	-
Goldman Sachs Small Cap Value A	377.90K	0.84%	56.89K
Fidelity Small Cap Index	429.27K	0.82%	-7.27K
John Hancock Financial Opportunities Fund	355.99K	0.79%	-

Recent Insider Transactions

Date	Name	Role	Activity	Value
Aug 04, 2025	Lyons Billy J Jr.	-	Buy	$415.25
Feb 10, 2025	Lyons Billy J Jr.	-	Buy	$418.44
Dec 23, 2024	Temple Rocks Patti	-	Buy	$100.07K
Nov 06, 2024	Ladowicz John	-	Sell	$253.70K
Nov 04, 2024	Lyons Billy J Jr.	-	Buy	$419.90

Insider Transactions Trends

Date	Buy	Sell
2025 Q3	1	-
2025 Q2	-	-
2025 Q1	1	-
2024 Q4	2	1
2024 Q3	1	1

OSBC Ownership FAQ

Who Owns Old Second Bancorp?

Old Second Bancorp shareholders are primarily institutional investors at 72.16%, followed by 4.73% insiders and 23.11% retail investors. The average institutional ownership in Old Second Bancorp's industry, Regional Banks Stocks, is 53.95%, which Old Second Bancorp exceeds.

Who owns the most shares of Old Second Bancorp?

Old Second Bancorp’s largest shareholders are Blackrock funding, inc. /de (3.5M shares, 7.79%), Blackrock (3.44M shares, 7.68%), and Vanguard group (2.64M shares, 5.88%). Together, they hold 21.35% of Old Second Bancorp’s total shares outstanding.

Does Blackrock own Old Second Bancorp?

Yes, BlackRock owns 7.68% of Old Second Bancorp, totaling 3.44M shares as of Jun 2024. This represents 0.00% of BlackRock's total assets, with a market value of 50.9M$. In the last quarter, BlackRock increased its holdings by 121.82K shares, a 3.67% change.

Who is Old Second Bancorp’s biggest shareholder by percentage of total assets invested?

Jacobs asset management is Old Second Bancorp’s biggest shareholder by percentage of total assets invested, with 4.68% of its assets in 462.5K Old Second Bancorp shares, valued at 8.2M$.

Who is the top mutual fund holder of Old Second Bancorp shares?

Vanguard US Total Market Shares ETF is the top mutual fund holder of Old Second Bancorp shares, with 3.04% of its total shares outstanding invested in 1.37M Old Second Bancorp shares.

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