Old Second Bancorp Inc (OSBC) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

46,776,821Shares Outstanding

945,748Shares held by institutions

$19,699,931Value of institutional holdings

78.82%Institutional ownership %

6.30%Shares Changed QoQ

173No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

The institutional landscape for Old Second Bancorp Inc (NASDAQ:OSBC) includes 173 filers as of the latest reporting cycle ending December 2025.

The collective stake of institutional investors in Old Second Bancorp moved to 78.8% in December 2025, a shift up from the 77.3% reported for September 2025.
The company experienced a 6.30% quarterly change in institutional shares held, alongside a decrease of 2.81% in total owners annually.
Among the 173 institutional holders of Old Second Bancorp, 91 added to their stakes while 57 trimmed their positions and 25 held steady.
The total number of shares held by institutions in Old Second Bancorp increased to 36.87Mn as of December 2025, a net change of up by 2.18Mn shares quarter on quarter, and up 4.68Mn shares year over year.
With 4.16Mn shares, BlackRock, Inc. commands the largest institutional position in Old Second Bancorp as of December 31, 2025, equating to 8.88% of the company.
Among the most significant buyers of Old Second Bancorp during December 2025 were Boston Partners (817.31K), WELLINGTON MANAGEMENT GROUP LLP (813.60K), BlackRock, Inc. (338.13K), MILLENNIUM MANAGEMENT LLC (313.56K), Davis Asset Management, L.P. (245.52K).
Leading sellers of Old Second Bancorp stock in December 2025 included GOLDMAN SACHS GROUP INC (295.48K), Qube Research & Technologies Ltd (201.16K), JACOBS ASSET MANAGEMENT, LLC (196.74K), TWO SIGMA INVESTMENTS, LP (155.19K), NORTHERN TRUST CORP (116.32K).
The top 10 institutional holders of Old Second Bancorp for the quarter ending December 2025 included BlackRock, Inc. (4.16Mn), VANGUARD GROUP INC (3.28Mn), DIMENSIONAL FUND ADVISORS LP (2.26Mn), FJ Capital Management LLC (1.83Mn), Davis Asset Management, L.P. (1.75Mn), STATE STREET CORP (1.54Mn), AMERICAN CENTURY COMPANIES INC (1.47Mn), GEODE CAPITAL MANAGEMENT, LLC (1.37Mn), KENNEDY CAPITAL MANAGEMENT LLC (1.27Mn), GOLDMAN SACHS GROUP INC (1.26Mn).

173 Institutional Holders

945,748 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	4,155,906	338,128	8.86%	$81,040,170.00
VANGUARD GROUP INC	31 Dec, 2025	3,278,388	8,395	0.26%	$63,928,567.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	2,260,874	55,990	2.54%	$44,087,037.00
FJ Capital Management LLC	31 Dec, 2025	1,829,665	-90,269	-4.70%	$35,678,468.00
Davis Asset Management, L.P.	31 Dec, 2025	1,745,523	245,523	16.37%	$34,037,699.00
STATE STREET CORP	31 Dec, 2025	1,539,419	171,941	12.57%	$30,018,671.00
AMERICAN CENTURY COMPANIES INC	31 Dec, 2025	1,470,185	82,294	5.93%	$28,668,625.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	1,365,448	2,263	0.17%	$26,632,393.00
KENNEDY CAPITAL MANAGEMENT LLC	31 Dec, 2025	1,267,042	173,724	15.89%	$24,707,319.00
GOLDMAN SACHS GROUP INC	31 Dec, 2025	1,263,223	-295,483	-18.96%	$24,632,849.00
WELLINGTON MANAGEMENT GROUP LLP	31 Dec, 2025	969,708	813,600	521.18%	$18,909,306.00
BANC FUNDS CO LLC	31 Dec, 2025	905,190	-101,188	-10.05%	$17,651,205.00
MANUFACTURERS LIFE INSURANCE COMPANY, THE	31 Dec, 2025	891,878	-24,790	-2.70%	$17,391,621.00
NORTHERN TRUST CORP	31 Dec, 2025	881,576	-116,322	-11.66%	$17,190,734.00
JPMORGAN CHASE & CO	31 Dec, 2025	858,806	78,805	10.10%	$16,746,719.00
Boston Partners	31 Dec, 2025	817,311	817,311	0.00%	$15,993,994.00
Stieven Capital Advisors, L.P.	31 Dec, 2025	776,128	-1,900	-0.24%	$15,134,496.00
ALLIANCEBERNSTEIN L.P.	31 Dec, 2025	686,032	-13,238	-1.89%	$13,377,624.00
AQR CAPITAL MANAGEMENT LLC	31 Dec, 2025	447,118	-70,981	-13.70%	$8,718,811.00
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	31 Dec, 2025	437,510	-81	-0.02%	$8,531,445.00

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