AURORA, IL
OLD SECOND BANCORP INCOSBC— Latest position per institution from SEC 13F filings
15
Institutional holders
33.72M
Total shares held
742.42M
Estimated value
1.69M
Avg. position size
BLACKROCK, INC.
CIK 2012383
Shares
4.30M
Value
100.25M
Filed
Jun 30, 2026
BLACKROCK FINANCE, INC.
CIK 1364742
Shares
3.44M
Value
50.90M
Filed
Jun 30, 2024
VANGUARD GROUP INC
CIK 102909
Shares
3.28M
Value
63.93M
Filed
Dec 31, 2025
DIMENSIONAL FUND ADVISORS LP
CIK 354204
Shares
2.50M
Value
58.27M
Filed
Jun 30, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
2.18M
Value
50.83M
Filed
Jun 30, 2026
STATE STREET CORP
CIK 93751
Shares
1.84M
Value
42.89M
Filed
Jun 30, 2026
DAVIS ASSET MANAGEMENT, L.P.
CIK 1945894
Shares
1.80M
Value
41.98M
Filed
Jun 30, 2026
AMERICAN CENTURY COMPANIES INC
CIK 748054
Shares
1.78M
Value
41.60M
Filed
Jun 30, 2026
GOLDMAN SACHS GROUP INC
CIK 886982
Shares
1.62M
Value
37.89M
Filed
Jun 30, 2026
FJ CAPITAL MANAGEMENT LLC
CIK 1599170
Shares
1.46M
Value
34.06M
Filed
Jun 30, 2026
BOSTON PARTNERS
CIK 1386060
Shares
1.42M
Value
32.92M
Filed
Jun 30, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
1.35M
Value
31.47M
Filed
Jun 30, 2026
KENNEDY CAPITAL MANAGEMENT LLC
CIK 884589
Shares
1.24M
Value
28.85M
Filed
Jun 30, 2026
BANC FUNDS CO LLC
CIK 1029311
Shares
1.03M
Value
24.12M
Filed
Jun 30, 2026
MANUFACTURERS LIFE INSURANCE COMPANY, THE
CIK 928047
Shares
872.65K
Value
20.35M
Filed
Jun 30, 2026
VANGUARD PORTFOLIO MANAGEMENT LLC
CIK 2100121
Shares
819.37K
Value
19.11M
Filed
Jun 30, 2026
STIEVEN CAPITAL ADVISORS, L.P.
CIK 1388279
Shares
815.33K
Value
19.01M
Filed
Jun 30, 2026
RIVER STREET ADVISORS LLC
CIK 1964897
Shares
779.01K
Value
18.17M
Filed
Jun 30, 2026
ALLIANCEBERNSTEIN L.P.
CIK 1109448
Shares
641.85K
Value
12.94M
Filed
Jun 30, 2026
JPMORGAN CHASE & CO
CIK 19617
Shares
555.60K
Value
12.90M
Filed
Jun 30, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | BLACKROCK, INC. | 2012383 | 4.30M | 100.25M | Jun 30, 2026 |
| 2 | BLACKROCK FINANCE, INC. | 1364742 | 3.44M | 50.90M | Jun 30, 2024 |
| 3 | VANGUARD GROUP INC | 102909 | 3.28M | 63.93M | Dec 31, 2025 |
| 4 | DIMENSIONAL FUND ADVISORS LP | 354204 | 2.50M | 58.27M | Jun 30, 2026 |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 2.18M | 50.83M | Jun 30, 2026 |
| 6 | STATE STREET CORP | 93751 | 1.84M | 42.89M | Jun 30, 2026 |
| 7 | DAVIS ASSET MANAGEMENT, L.P. | 1945894 | 1.80M | 41.98M | Jun 30, 2026 |
| 8 | AMERICAN CENTURY COMPANIES INC | 748054 | 1.78M | 41.60M | Jun 30, 2026 |
| 9 | GOLDMAN SACHS GROUP INC | 886982 | 1.62M | 37.89M | Jun 30, 2026 |
| 10 | FJ CAPITAL MANAGEMENT LLC | 1599170 | 1.46M | 34.06M | Jun 30, 2026 |
| 11 | BOSTON PARTNERS | 1386060 | 1.42M | 32.92M | Jun 30, 2026 |
| 12 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 1.35M | 31.47M | Jun 30, 2026 |
| 13 | KENNEDY CAPITAL MANAGEMENT LLC | 884589 | 1.24M | 28.85M | Jun 30, 2026 |
| 14 | BANC FUNDS CO LLC | 1029311 | 1.03M | 24.12M | Jun 30, 2026 |
| 15 | MANUFACTURERS LIFE INSURANCE COMPANY, THE | 928047 | 872.65K | 20.35M | Jun 30, 2026 |
| 16 | VANGUARD PORTFOLIO MANAGEMENT LLC | 2100121 | 819.37K | 19.11M | Jun 30, 2026 |
| 17 | STIEVEN CAPITAL ADVISORS, L.P. | 1388279 | 815.33K | 19.01M | Jun 30, 2026 |
| 18 | RIVER STREET ADVISORS LLC | 1964897 | 779.01K | 18.17M | Jun 30, 2026 |
| 19 | ALLIANCEBERNSTEIN L.P. | 1109448 | 641.85K | 12.94M | Jun 30, 2026 |
| 20 | JPMORGAN CHASE & CO | 19617 | 555.60K | 12.90M | Jun 30, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.