Old Second Bancorp Ownership | Who Owns Old Second Bancorp?

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Old Second Bancorp Ownership Summary

Old Second Bancorp is owned by 29.88% institutional investors, 4.72% insiders, and 65.39% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 7.89% of OSBC shares. Vanguard Total Stock Mkt Idx Inv is the top mutual fund, with 3.06% of its assets in Old Second Bancorp shares.

OSBC Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Old Second Bancorp	29.88%	4.72%	65.39%
Sector	Financial Services Stocks	32.19%	15.44%	52.37%
Industry	Regional Banks Stocks	31.54%	12.70%	55.76%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock funding, inc. /de	4.16M	7.89%	$81.04M
Blackrock	3.44M	7.68%	$50.90M
Vanguard group	3.28M	6.22%	$63.93M
Dimensional fund advisors lp	2.26M	4.29%	$44.09M
Fj capital management	1.92M	4.27%	$33.19M
Davis asset management	1.75M	3.31%	$34.04M
American century companies	1.39M	3.09%	$23.99M
State street	1.37M	3.04%	$23.64M
Geode capital management	1.37M	2.59%	$26.63M
Kennedy capital management	1.09M	2.43%	$18.90M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Jacobs asset management	478.22K	4.52%	$8.27M
Fj capital management	1.92M	3.54%	$33.19M
Banc funds	905.19K	3.49%	$17.65M
Stieven capital advisors	776.13K	2.81%	$15.13M
River street advisors	366.07K	2.67%	$7.14M
Elizabeth park capital advisors	158.66K	2.22%	$2.74M
Ejf capital	173.83K	1.75%	$3.00M
Jcsd capital	74.10K	1.71%	$1.44M
Pmc fig opportunities	56.57K	1.47%	$977.79K
Gator capital management	335.33K	1.47%	$5.80M

Top Buyers

Holder	Shares	% Assets	Change
Northern trust	997.90K	0.00%	583.49K
Blackrock funding, inc. /de	4.16M	0.00%	338.13K
Millennium management	308.22K	0.00%	252.43K
Davis asset management	1.75M	1.22%	245.52K
Nuveen asset management	281.57K	0.00%	183.87K

Top Sellers

Holder	Shares	% Assets	Change
Goldman sachs group	1.26M	0.00%	-295.48K
Aptus capital advisors	-	-	-286.89K
Lsv asset management	-	-	-193.43K
Banc funds	905.19K	3.49%	-101.19K
Adage capital partners gp	-	-	-100.00K

New Positions

Holder	Shares	% Assets	Change	Value
Boothbay fund management	125.25K	0.03%	125.25K	$2.16M
Pmc fig opportunities	56.57K	1.47%	56.57K	$977.79K
Ci private wealth	40.75K	0.00%	40.75K	$704.42K
Magnetar financial	23.90K	0.00%	23.90K	$413.13K
Persistent asset partners	18.18K	0.22%	18.18K	$314.28K

Sold Out

Holder	Change
Caitong asset management	-1.00
Tfc financial management	-1.00
Hallmark capital management	-1.00
Nelson, van denburg & campbell wealth management group	-9.00
Massmutual trust co fsb/adv	-19.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Dec 31, 2025	90	-54.77%	15,739,656	-56.46%	29	0.46%	48	-60.33%	24	-47.83%
Sep 30, 2025	100	-42.86%	17,925,486	-39.33%	39	0.92%	59	-31.40%	24	-60.66%
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%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard Total Stock Mkt Idx Inv	1.61M	3.06%	-
Vanguard US Total Market Shares ETF	1.37M	3.04%	-
Avantis US Small Cap Value ETF	1.28M	2.43%	3.09K
iShares Russell 2000 ETF	1.22M	2.32%	329.52K
Kennedy Small Cap Value	656.11K	1.25%	159.44K
Vanguard Institutional Extnd Mkt Idx Tr	570.83K	1.08%	2.94K
Fidelity Small Cap Index	501.82K	0.95%	6.14K
JHancock Regional Bank A	453.41K	0.86%	-10.67K
iShares Russell 2000 Value ETF	434.04K	0.82%	21.06K
John Hancock Financial Opportunities Fund	355.99K	0.79%	-

Recent Insider Transactions

Date	Name	Role	Activity	Value
Feb 18, 2026	Campbell Darin Patrick	President, Powersports Lending	Sell	$732.90K
Feb 13, 2026	Campbell Darin Patrick	President, Powersports Lending	Sell	$1.88K
Feb 05, 2026	Gartelmann Richard A JR	EVP	Sell	$41.95K
Jan 15, 2026	Ladowicz John	-	Sell	$60.67K
Jan 15, 2026	Ladowicz John	-	Sell	$39.09K

Insider Transactions Trends

Date	Buy	Sell
2026 Q1	-	5
2025 Q4	-	4
2025 Q3	1	-
2025 Q2	-	-
2025 Q1	1	-

OSBC Ownership FAQ

Who Owns Old Second Bancorp?

Old Second Bancorp shareholders are primarily institutional investors at 29.88%, followed by 4.72% insiders and 65.40% retail investors. The average institutional ownership in Old Second Bancorp's industry, Regional Banks Stocks, is 31.54%, which Old Second Bancorp falls below.

Who owns the most shares of Old Second Bancorp?

Old Second Bancorp’s largest shareholders are Blackrock funding, inc. /de (4.16M shares, 7.89%), Blackrock (3.44M shares, 7.68%), and Vanguard group (3.28M shares, 6.22%). Together, they hold 21.79% 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 4.52% of its assets in 478.22K Old Second Bancorp shares, valued at 8.27M$.

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

Vanguard Total Stock Mkt Idx Inv is the top mutual fund holder of Old Second Bancorp shares, with 3.06% of its total shares outstanding invested in 1.61M Old Second Bancorp shares.

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