YORK JILL E reported 22 transactions at OLD SECOND BANCORP INC

Review the transaction codes below to understand the nature of each event.

YORK JILL E

Filed: 10/21/2026ACC: 0001244438-26-000006

InsiderYORK JILL ECIK 1244438

→

IssuerOLD SECOND BANCORP INCCIK 357173

Director

Since Oct 2020

+319.64

Net shares

Net buyer

$5.1K

Total acquired

Open market trades

0B · 0S

Total transactions

319.64 acquired

Non-Derivative Transactions22

Old Second Bancorp, Inc. Common Stock

Direct

L · L

+14.21

Price / share

$14.08

Trade value

$200.05

% of position

0.3%

5/11/2021

4.31K→4.32K

Old Second Bancorp, Inc. Common Stock

Direct

L · L

+17.54

Price / share

$11.44

Trade value

$200.71

% of position

0.4%

8/11/2021

4.30K→4.32K

Old Second Bancorp, Inc. Common Stock

Direct

L · L

+14.60

Price / share

$13.81

Trade value

$201.59

% of position

0.3%

11/9/2021

4.31K→4.32K

Old Second Bancorp, Inc. Common Stock

Direct

L · L

+14.03

Price / share

$14.43

Trade value

$202.38

% of position

0.3%

2/8/2022

4.31K→4.32K

Old Second Bancorp, Inc. Common Stock

Direct

L · L

+14.36

Price / share

$14.14

Trade value

$203.02

% of position

0.3%

5/10/2022

4.31K→4.32K

Old Second Bancorp, Inc. Common Stock

Direct

L · L

+14.58

Price / share

$13.98

Trade value

$203.80

% of position

0.3%

8/9/2022

4.31K→4.32K

Old Second Bancorp, Inc. Common Stock

Direct

L · L

+12.05

Price / share

$16.97

Trade value

$204.51

% of position

0.3%

11/8/2022

4.31K→4.32K

Old Second Bancorp, Inc. Common Stock

Direct

L · L

+11.92

Price / share

$17.21

Trade value

$205.08

% of position

0.3%

2/7/2023

4.31K→4.32K

Old Second Bancorp, Inc. Common Stock

Direct

L · L

+18.43

Price / share

$11.16

Trade value

$205.66

% of position

0.4%

5/9/2023

4.30K→4.32K

Old Second Bancorp, Inc. Common Stock

Direct

L · L

+12.92

Price / share

$15.99

Trade value

$206.55

% of position

0.3%

8/8/2023

4.31K→4.32K

Old Second Bancorp, Inc. Common Stock

Direct

L · L

+14.52

Price / share

$14.27

Trade value

$207.24

% of position

0.3%

11/7/2023

4.31K→4.32K

Old Second Bancorp, Inc. Common Stock

Direct

L · L

+15.45

Price / share

$13.46

Trade value

$207.99

% of position

0.4%

2/6/2024

4.30K→4.32K

Old Second Bancorp, Inc. Common Stock

Direct

L · L

+14.46

Price / share

$14.43

Trade value

$208.66

% of position

0.3%

5/6/2024

4.31K→4.32K

Old Second Bancorp, Inc. Common Stock

Direct

L · L

+14.10

Price / share

$14.86

Trade value

$209.46

% of position

0.3%

8/5/2024

4.31K→4.32K

Old Second Bancorp, Inc. Common Stock

Direct

L · L

+15.62

Price / share

$16.15

Trade value

$252.19

% of position

0.4%

11/4/2024

4.30K→4.32K

Old Second Bancorp, Inc. Common Stock

Direct

L · L

+13.31

Price / share

$19.02

Trade value

$253.13

% of position

0.3%

2/10/2025

4.31K→4.32K

Old Second Bancorp, Inc. Common Stock

Direct

L · L

+15.58

Price / share

$16.30

Trade value

$253.92

% of position

0.4%

5/5/2025

4.30K→4.32K

Old Second Bancorp, Inc. Common Stock

Direct

L · L

+15.34

Price / share

$16.61

Trade value

$254.81

% of position

0.4%

8/4/2025

4.30K→4.32K

Old Second Bancorp, Inc. Common Stock

Direct

L · L

+16.26

Price / share

$18.35

Trade value

$298.41

% of position

0.4%

11/10/2025

4.30K→4.32K

Old Second Bancorp, Inc. Common Stock

Direct

L · L

+14.12

Price / share

$21.21

Trade value

$299.52

% of position

0.3%

2/9/2026

4.31K→4.32K

Old Second Bancorp, Inc. Common Stock

Direct

L · L

+14.38

Price / share

$20.90

Trade value

$300.47

% of position

0.3%

5/11/2026

4.31K→4.32K

Old Second Bancorp, Inc. Common Stock

Direct

L · L

+11.88

Price / share

$25.38

Trade value

$301.52

% of position

0.3%

8/10/2026

4.31K→4.32K

Total

Net shares

+319.64

Net value

$5.08K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Old Second Bancorp, Inc. Common Stock Direct	5/11/2021	L · L	+14.21	$14.08	$200.05	0.3%	4.31K	4.32K
Old Second Bancorp, Inc. Common Stock Direct	8/11/2021	L · L	+17.54	$11.44	$200.71	0.4%	4.30K	4.32K
Old Second Bancorp, Inc. Common Stock Direct	11/9/2021	L · L	+14.60	$13.81	$201.59	0.3%	4.31K	4.32K
Old Second Bancorp, Inc. Common Stock Direct	2/8/2022	L · L	+14.03	$14.43	$202.38	0.3%	4.31K	4.32K
Old Second Bancorp, Inc. Common Stock Direct	5/10/2022	L · L	+14.36	$14.14	$203.02	0.3%	4.31K	4.32K
Old Second Bancorp, Inc. Common Stock Direct	8/9/2022	L · L	+14.58	$13.98	$203.80	0.3%	4.31K	4.32K
Old Second Bancorp, Inc. Common Stock Direct	11/8/2022	L · L	+12.05	$16.97	$204.51	0.3%	4.31K	4.32K
Old Second Bancorp, Inc. Common Stock Direct	2/7/2023	L · L	+11.92	$17.21	$205.08	0.3%	4.31K	4.32K
Old Second Bancorp, Inc. Common Stock Direct	5/9/2023	L · L	+18.43	$11.16	$205.66	0.4%	4.30K	4.32K
Old Second Bancorp, Inc. Common Stock Direct	8/8/2023	L · L	+12.92	$15.99	$206.55	0.3%	4.31K	4.32K
Old Second Bancorp, Inc. Common Stock Direct	11/7/2023	L · L	+14.52	$14.27	$207.24	0.3%	4.31K	4.32K
Old Second Bancorp, Inc. Common Stock Direct	2/6/2024	L · L	+15.45	$13.46	$207.99	0.4%	4.30K	4.32K
Old Second Bancorp, Inc. Common Stock Direct	5/6/2024	L · L	+14.46	$14.43	$208.66	0.3%	4.31K	4.32K
Old Second Bancorp, Inc. Common Stock Direct	8/5/2024	L · L	+14.10	$14.86	$209.46	0.3%	4.31K	4.32K
Old Second Bancorp, Inc. Common Stock Direct	11/4/2024	L · L	+15.62	$16.15	$252.19	0.4%	4.30K	4.32K
Old Second Bancorp, Inc. Common Stock Direct	2/10/2025	L · L	+13.31	$19.02	$253.13	0.3%	4.31K	4.32K
Old Second Bancorp, Inc. Common Stock Direct	5/5/2025	L · L	+15.58	$16.30	$253.92	0.4%	4.30K	4.32K
Old Second Bancorp, Inc. Common Stock Direct	8/4/2025	L · L	+15.34	$16.61	$254.81	0.4%	4.30K	4.32K
Old Second Bancorp, Inc. Common Stock Direct	11/10/2025	L · L	+16.26	$18.35	$298.41	0.4%	4.30K	4.32K
Old Second Bancorp, Inc. Common Stock Direct	2/9/2026	L · L	+14.12	$21.21	$299.52	0.3%	4.31K	4.32K
Old Second Bancorp, Inc. Common Stock Direct	5/11/2026	L · L	+14.38	$20.90	$300.47	0.3%	4.31K	4.32K
Old Second Bancorp, Inc. Common Stock Direct	8/10/2026	L · L	+11.88	$25.38	$301.52	0.3%	4.31K	4.32K
Total			+319.64		$5.08K

Derivative Transactions0

No derivative transactions reported

Non-Derivative Holdings (Post-Transaction)2

Restricted Stock Units

Direct

Shares owned10.60K

Old Second Bancorp, Inc. Common Stock

Indirect

Shares owned15.43K

Total

10.60K direct·15.43K indirect26.02K

Security Title	Shares Owned	Ownership Type
Restricted Stock Units	10.60K	Direct
Old Second Bancorp, Inc. Common Stock	15.43K	Indirect
Total	26.02K	10.60K direct·15.43K indirect

Derivative Holdings (Post-Transaction)0

No derivative holdings reported