OSBC · Old Second Bancorp Inc · Shareholders & Ownership
$24.71
-0.16 (-0.64%)
At close · Oct 22
Return incl. dividend (before tax)
Earnings today
Market Cap
$1.27B
Shares
50.88M
Volume · Oct 22
829.54K
Avg daily vol (3M)
490.34K
Every disclosed holder of OSBC in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.
Who Owns OSBC
13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions| Holder group | Shares | % Out |
|---|---|---|
| Institutional (13F) | 38,975,009 | 76.61% |
| Insiders (Forms 3, 4, 5) | 2,263,590 | 4.45% |
| 13D/G-only blocks | 0 | 0.00% |
| Remaining | 9,637,117 | 18.94% |
| Registered funds (N-PORT, not summed) | 16,439,529 | 32.31% |
Shares outstanding: 50,875,716, the issuer's latest cover-page count restated onto today's split basis.
13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.
Holders of OSBC
| # | Holder | Shares | As of | Notes |
|---|---|---|---|---|
| 1 |
BlackRock, Inc.
13F
CIK 2012383 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
4,298,683 | ||
| 1.1 |
iShares Russell 2000 ETF
Fund
S000004344 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
1,324,596 | ||
| 1.2 |
iShares Russell 2000 Value ETF
Fund
S000004342 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
467,688 | ||
| 1.3 |
iShares Micro-Cap ETF
Fund
S000004439 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
170,138 | ||
| 1.4 |
Master Small Cap Index Series
Fund
S000002716 · Registered fund · Jun 30, 2026
Quantitative Master Series LLC, not summed
|
94,952 | ||
| 1.5 |
iShares Core S&P Total U.S. Stock Market ETF
Fund
S000004317 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
83,481 | ||
| 2 |
DIMENSIONAL FUND ADVISORS LP
13G
CIK 354204 · Registered investment adviser · Sep 30, 2026
Rule 13d-1(b), qualified institution, not summed
|
2,575,752 | ||
| 2.1 |
DIMENSIONAL FUND ADVISORS LP
13F
CIK 354204 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,498,671 | ||
| 2.2 |
U.S. SMALL CAP VALUE PORTFOLIO
Fund
S000000987 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
366,649 | ||
| 2.3 |
U.S. Targeted Value Portfolio
Fund
S000000970 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
312,302 | ||
| 2.4 |
Dimensional U.S. Targeted Value ETF
Fund
S000070901 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
281,794 | ||
| 2.5 |
Dimensional US Small Cap Value ETF
Fund
S000075151 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
261,820 | ||
| 3 |
VANGUARD CAPITAL MANAGEMENT LLC
13F
CIK 2100119 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,179,877 | ||
| 4 |
|
1,839,202 | ||
| 4.1 |
State Street(R) SPDR(R) S&P(R) Regional Banking ETF
Fund
S000012325 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
570,885 | ||
| 4.2 |
State Street Institutional Small-Cap Equity Fund
Fund
S000001631 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL FUNDS, not summed
|
27,370 | ||
| 4.3 |
STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO
Fund
S000050332 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
|
18,035 | ||
| 4.4 |
State Street Total Return V.I.S. Fund
Fund
S000001637 · Registered fund · Jun 30, 2026
STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
|
1,282 | ||
| 4.5 |
State Street Small-Cap Equity V.I.S. Fund
Fund
S000001636 · Registered fund · Jun 30, 2026
STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
|
1,228 | ||
| 5 |
Davis Asset Management, L.P.
13F
CIK 1945894 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,800,000 | ||
| 6 |
AMERICAN CENTURY COMPANIES INC
13F
CIK 748054 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,783,820 | ||
| 7 |
GOLDMAN SACHS GROUP INC
13F
CIK 886982 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,624,852 | ||
| 7.1 |
Goldman Sachs Small Cap Value Fund
Fund
S000009323 · Registered fund · May 31, 2026
Goldman Sachs Trust, not summed
|
416,551 | ||
| 7.2 |
Goldman Sachs Small Cap Value Insights Fund
Fund
S000014929 · Registered fund · Jul 31, 2026
Goldman Sachs Trust, not summed
|
50,841 | ||
| 7.3 |
Multi-Manager U.S. Small Cap Equity Fund
Fund
S000051363 · Registered fund · Apr 30, 2026
Goldman Sachs Trust II, not summed
|
22,659 | ||
| 7.4 |
Goldman Sachs Small Cap Equity Insights Fund
Fund
S000009329 · Registered fund · Jul 31, 2026
Goldman Sachs Trust, not summed
|
21,780 | ||
| 7.5 |
Goldman Sachs Multi-Manager Global Equity Fund
Fund
S000049146 · Registered fund · Jul 31, 2026
Goldman Sachs Trust II, not summed
|
15,170 | ||
| 8 |
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund
S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
1,535,474 | ||
| 9 |
FJ Capital Management LLC
13F
CIK 1599170 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,460,413 | ||
| 10 |
Avantis U.S. Small Cap Value ETF
Fund
S000066459 · Registered fund · May 31, 2026
American Century ETF Trust, not summed
|
1,424,241 | ||
| 11 |
Boston Partners
13F
CIK 1386060 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,415,165 | ||
| 12 |
GEODE CAPITAL MANAGEMENT, LLC
13F
CIK 1214717 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,349,432 | ||
| 13 |
KENNEDY CAPITAL MANAGEMENT LLC
13F
CIK 884589 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,236,983 | ||
| 13.1 |
Kennedy Capital Small Cap Value Fund
Fund
S000076118 · Registered fund · Jun 30, 2026
INVESTMENT MANAGERS SERIES TRUST II, not summed
|
33,980 | ||
| 14 |
BANC FUNDS CO LLC
13F
CIK 1029311 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,034,143 | ||
| 15 |
MANUFACTURERS LIFE INSURANCE COMPANY, THE
13F
CIK 928047 · Non-US institution · Jun 30, 2026
carried, not yet filed for the newest quarter
|
872,651 | ||
| 15.1 |
Regional Bank Fund
Fund
S000000635 · Registered fund · Jul 31, 2026
John Hancock Investment Trust II, not summed
|
450,953 | ||
| 16 |
VANGUARD PORTFOLIO MANAGEMENT LLC
13F
CIK 2100121 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
819,368 | ||
| 17 |
Stieven Capital Advisors, L.P.
13F
CIK 1388279 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
815,328 | ||
| 18 |
River Street Advisors LLC
13F
CIK 1964897 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
779,008 | ||
| 19 |
ALLIANCEBERNSTEIN L.P.
13F
CIK 1109448 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
641,845 | ||
| 20 |
VANGUARD EXTENDED MARKET INDEX FUND
Fund
S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
593,411 | ||
| 21 |
JPMORGAN CHASE & CO
13F
CIK 19617 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
555,602 | ||
| 22 |
NORTHERN TRUST CORP
13F
CIK 73124 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
555,408 | ||
| 22.1 |
Small Cap Index Fund
Fund
S000001245 · Registered fund · Jun 30, 2026
Northern Funds, not summed
|
25,986 | ||
| 22.2 |
FlexShares Morningstar US Market Factor Tilt Index Fund
Fund
S000033312 · Registered fund · Jul 31, 2026
FlexShares Trust, not summed
|
6,636 | ||
| 22.3 |
Small Cap Core Fund
Fund
S000001244 · Registered fund · Jun 30, 2026
Northern Funds, not summed
|
1,627 | ||
| 23 |
WELLINGTON MANAGEMENT GROUP LLP
13F
CIK 902219 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
544,345 | ||
| 24 |
|
525,241 | ||
| 25 |
|
492,162 | ||
| 25.1 |
Nuveen Small Cap Value Fund
Fund
S000005570 · Registered fund · Jul 31, 2026
Nuveen Investment Funds, Inc., not summed
|
247,049 | ||
| 25.2 |
Nuveen Small Cap Blend Index Fund
Fund
S000005367 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
|
67,020 | ||
| 25.3 |
College Retirement Equities Fund - Total Global Stock Account
Fund
S000005080 · Registered fund · Jun 30, 2026
College Retirement Equities Fund, not summed
|
42,770 | ||
| 25.4 |
Nuveen Equity Index Fund
Fund
S000005360 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
|
15,534 | ||
| 25.5 |
TIAA Separate Account VA-1 - Stock Index Account
Fund
S000005098 · Registered fund · Jun 30, 2026
TIAA Separate Account VA-1, not summed
|
1,237 | ||
| 26 |
BRIDGEWAY CAPITAL MANAGEMENT, LLC
13F
CIK 1107261 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
453,323 | ||
| 26.1 |
Omni Small-Cap Value Fund
Fund
S000033567 · Registered fund · Jun 30, 2026
Bridgeway Funds, Inc., not summed
|
132,603 | ||
| 26.2 |
Small-Cap Value Fund
Fund
S000004427 · Registered fund · Jun 30, 2026
Bridgeway Funds, Inc., not summed
|
72,093 | ||
| 27 |
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
13F
CIK 884546 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
431,304 | ||
| 27.1 |
Schwab U.S. Small-Cap ETF
Fund
S000026636 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
255,668 | ||
| 27.2 |
Schwab Small-Cap Index Fund
Fund
S000005912 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
122,629 | ||
| 27.3 |
Schwab U.S. Broad Market ETF
Fund
S000026631 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
32,956 | ||
| 27.4 |
Schwab Total Stock Market Index Fund
Fund
S000005913 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
31,972 | ||
| 28 |
CONGRESS ASSET MANAGEMENT CO
13F
CIK 897378 · Registered investment adviser · Sep 30, 2026
|
411,201 | ||
| 29 |
AQR CAPITAL MANAGEMENT LLC
13F
CIK 1167557 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
386,234 | ||
| 29.1 |
AQR Small Cap Multi-Style Fund
Fund
S000040064 · Registered fund · Jun 30, 2026
AQR Funds, not summed
|
5,017 | ||
| 30 |
BANK OF AMERICA CORP /DE/
13F
CIK 70858 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
372,648 | ||
| 31 |
VANGUARD STRATEGIC SMALL-CAP EQUITY FUND
Fund
S000012432 · Registered fund · Jun 30, 2026
VANGUARD HORIZON FUNDS, not summed
|
367,820 | ||
| 32 |
Gator Capital Management, LLC
13F
CIK 1570284 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
359,730 | ||
| 33 |
John Hancock Financial Opportunities Fund
Fund
· Registered fund · Jun 30, 2026
John Hancock Financial Opportunities Fund, not summed
|
355,988 | ||
| 34 |
Bank of New York Mellon Corp
13F
CIK 1390777 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
342,013 | ||
| 35 |
VANGUARD FIDUCIARY TRUST CO
13F
CIK 933478 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
341,200 | ||
| 36 |
Boston Partners Small Cap Value Fund II
Fund
S000001094 · Registered fund · May 31, 2026
RBB Fund, Inc., not summed
|
324,461 | ||
| 37 |
MORGAN STANLEY
13F
CIK 895421 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
318,318 | ||
| 37.1 |
E*TRADE No Fee Total Market Index Fund
Fund
S000090722 · Registered fund · Jul 31, 2026
E Trade Trust, not summed
|
144 | ||
| 38 |
CITADEL ADVISORS LLC
13F
CIK 1423053 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
304,021 | ||
| 39 |
Campbell Darin Patrick
Insider
CIK 2074132 · Sep 2, 2026
Director, President, Powersports Lending, issuer-wide
|
261,151 | ||
| 40 |
FRANKLIN RESOURCES INC
13F
CIK 38777 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
259,324 | ||
| 40.1 |
Putnam Small Cap Value Fund
Fund
S000003854 · Registered fund · May 31, 2026
Putnam Investment Funds, not summed
|
76,700 | ||
| 40.2 |
Putnam VT Small Cap Value Fund
Fund
S000003888 · Registered fund · Jun 30, 2026
Putnam Variable Trust, not summed
|
46,400 | ||
| 41 |
VANGUARD RUSSELL 2000 INDEX FUND
Fund
S000030003 · Registered fund · May 31, 2026
VANGUARD SCOTTSDALE FUNDS, not summed
|
259,139 | ||
| 42 |
|
255,602 | ||
| 43 |
Empowered Funds, LLC
13F
CIK 1592828 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
248,627 | ||
| 43.1 |
EA Bridgeway Omni Small-Cap Value ETF
Fund
S000078089 · Registered fund · Jun 30, 2026
EA Series Trust, not summed
|
248,627 | ||
| 44 |
Thrivent Financial for Lutherans
13F
CIK 314984 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
242,278 | ||
| 44.1 |
THRIVENT MODERATELY AGGRESSIVE ALLOCATION PORTFOLIO
Fund
S000001427 · Registered fund · Jun 30, 2026
Thrivent Series Fund, Inc., not summed
|
46,553 | ||
| 44.2 |
THRIVENT MODERATE ALLOCATION PORTFOLIO
Fund
S000001438 · Registered fund · Jun 30, 2026
Thrivent Series Fund, Inc., not summed
|
45,891 | ||
| 44.3 |
THRIVENT MODERATELY AGGRESSIVE ALLOCATION FUND
Fund
S000001347 · Registered fund · Jul 31, 2026
Thrivent Mutual Funds, not summed
|
30,882 | ||
| 44.4 |
THRIVENT MODERATE ALLOCATION FUND
Fund
S000001346 · Registered fund · Jul 31, 2026
Thrivent Mutual Funds, not summed
|
21,386 | ||
| 44.5 |
THRIVENT AGGRESSIVE ALLOCATION FUND
Fund
S000000700 · Registered fund · Jul 31, 2026
Thrivent Mutual Funds, not summed
|
19,117 | ||
| 45 |
Forum Financial Management, LP
13F
CIK 1911832 · Registered investment adviser · Sep 30, 2026
|
237,367 | ||
| 46 |
Mariner, LLC
13F
CIK 1373442 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
225,303 | ||
| 47 |
JNL Multi-Manager Small Cap Value Fund
Fund
S000001798 · Registered fund · Jun 30, 2026
JNL Series Trust, not summed
|
212,181 | ||
| 48 |
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
13F
CIK 1164508 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
210,745 | ||
| 49 |
GREAT LAKES ADVISORS, LLC
13F
CIK 1078013 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
203,909 | ||
| 50 |
TWO SIGMA INVESTMENTS, LP
13F
CIK 1179392 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
200,819 |
40 more nested rows are not shown here; Every filing lists them all.
Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.
Showing 1–50 of 305 holders
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Key facts
CIK
357173
CUSIP
680277100
13F (30d)
27 filings
27 filers
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