Form 13-F position report

OLD SECOND BANCORP INC

Reported by NORTHERN TRUST CORPORATION

OSBC CUSIP 680277100 Manager CIK 0000073124

Reported 881,576 shares, down 116,322 (11.7%) from the prior quarter.

Reported value -0.3%; share count -11.7% vs. the prior quarter.

Reduced
% of reported 13F value < 0.01% This manager · Q4 2025
Shares 881,576 Quarter-end amount reported
Reported value $17,190,734 Fair value at quarter end
Consecutive quarters held 51 Through Q4 2025

Reported position value by quarter

Reported position value by quarter

Each bar is a Form 13-F quarter-end snapshot. It does not show trades made within the quarter.

Reported position value by quarter
Date Holding Value
2021-09-30 4278000
2021-12-31 5684000
2022-03-31 8535000
2022-06-30 9618000
2022-09-30 8958000
2022-12-31 10410826
2023-03-31 8851642
2023-06-30 8359301
2023-09-30 8763084
2023-12-31 9845501
2024-03-31 8321841
2024-06-30 9089564
2024-09-30 7216798
2024-12-31 7950239
2025-03-31 6958615
2025-06-30 7351580
2025-09-30 17248667
2025-12-31 17190734
2026-03-31 15409115
2026-06-30 12952115

Quarterly position history

How this manager's reported quarter-end position changed over time.

20 quarters
Quarterly reported position history for OLD SECOND BANCORP INC held by NORTHERN TRUST CORPORATION.
Quarter Activity Shares Change % of reported 13F Reported value Filed Source filing
Q2 2026 Reduced 555,408 -208,933 (-27.3%) < 0.01% $12,952,115 2026-08-13
Q1 2026 Reduced 764,341 -117,235 (-13.3%) < 0.01% $15,409,115 2026-05-14
Q4 2025 Reduced 881,576 -116,322 (-11.7%) < 0.01% $17,190,734 2026-02-17
Q3 2025 Added 997,898 +583,491 (140.8%) < 0.01% $17,248,667 2025-11-14
Q2 2025 Reduced 414,407 -3,779 (-0.9%) < 0.01% $7,351,580 2025-08-13
Q1 2025 Reduced 418,186 -28,959 (-6.5%) < 0.01% $6,958,615 2025-05-13
Q4 2024 Reduced 447,145 -15,767 (-3.4%) < 0.01% $7,950,239 2025-02-14
Q3 2024 Reduced 462,912 -150,833 (-24.6%) < 0.01% $7,216,798 2024-11-13
Q2 2024 Added 613,745 +12,456 (2.1%) < 0.01% $9,089,564 2024-08-14
Q1 2024 Reduced 601,289 -36,373 (-5.7%) < 0.01% $8,321,841 2024-05-14
Q4 2023 Reduced 637,662 -6,209 (-1.0%) < 0.01% $9,845,501 2024-02-13
Q3 2023 Added 643,871 +3,802 (0.6%) < 0.01% $8,763,084 2023-11-13
Q2 2023 Added 640,069 +10,507 (1.7%) < 0.01% $8,359,301 2023-08-11
Q1 2023 Reduced 629,562 -19,492 (-3.0%) < 0.01% $8,851,642 2023-05-15
Q4 2022 Reduced 649,054 -37,350 (-5.4%) < 0.01% $10,410,826 2023-02-13
Q3 2022 Reduced 686,404 -32,370 (-4.5%) < 0.01% $8,958,000 2022-11-14
Q2 2022 Added 718,774 +130,574 (22.2%) < 0.01% $9,618,000 2022-08-12
Q1 2022 Added 588,200 +136,729 (30.3%) < 0.01% $8,535,000 2022-05-13
Q4 2021 Added 451,471 +123,867 (37.8%) < 0.01% $5,684,000 2022-02-08
Q3 2021 Added 327,604 +4,648 (1.4%) < 0.01% $4,278,000 2021-11-15
Five years are shown. A free account unlocks the complete reported history. Unlock full history

Who else reported the position

216 managers reported OLD SECOND BANCORP INC for Q4 2025.

Managers reporting OLD SECOND BANCORP INC in Q4 2025.
Manager Activity Shares Change % of reported 13F Reported value Tenure
BlackRock Inc Added 4,155,906 +338,128 < 0.01% $81,040,170 6 qtrs
VANGUARD GROUP INC Added 3,278,388 +8,395 < 0.01% $63,928,567 51 qtrs
DIMENSIONAL FUND ADVISORS LP Added 2,260,874 +55,990 < 0.01% $44,087,037 51 qtrs
FJ Capital Management LLC Reduced 1,829,665 -90,269 3.94% $35,678,468 47 qtrs
Davis Asset Management L P Added 1,745,523 +245,523 1.22% $34,037,699 7 qtrs
STATE STREET CORPORATION Added 1,539,419 +171,941 < 0.01% $30,018,671 43 qtrs
AMERICAN CENTURY COMPANIES INC Added 1,470,185 +82,294 0.01% $28,668,625 24 qtrs
GEODE CAPITAL MANAGEMENT LLC Added 1,365,448 +2,263 < 0.01% $26,632,393 51 qtrs
KENNEDY CAPITAL MANAGEMENT LLC Added 1,267,042 +173,724 0.52% $24,707,319 33 qtrs
The Goldman Sachs Group Inc Reduced 1,263,223 -295,483 < 0.01% $24,632,849 40 qtrs
Premium adds each manager's conviction percentile across reporting peers.
Filing details and methodology As reported
Report period
December 31, 2025
Filed
February 17, 2026
Filing type
13F-HR
Position type
COM

Voting authority reported

Sole
873,176
Shared
8,400
None
0

“None” means the manager reported no voting authority for those shares on non-routine matters. It does not disclose why and is not evidence of securities lending.

Form 13-F is a delayed quarter-end snapshot of disclosed long Section 13(f) securities. It can be filed up to 45 days after quarter end, excludes short positions and most non-U.S. securities, and does not reveal intra-quarter trading. For options, reported shares and value describe the underlying-share exposure; strike, expiry, premium, and written positions are not disclosed.