OLD SECOND BANCORP INC ILL

Ticker: OSBC CUSIP: 680277100 Class: Common Stock

MARTINGALE ASSET MANAGEMENT L P's Holding History (CIK: 0000936944)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 110,468 Value ($000) $2,154 Avg Close $18.60 Range $16.53 - $20.89

Q3 2025

Shares 135,240 Value ($000) $2,338 Avg Close $17.86 Range $16.31 - $19.04

Q2 2025

Shares 131,992 Value ($000) $2,342 Avg Close $16.11 Range $13.93 - $17.67

Q1 2025

Shares 103,359 Value ($000) $1,720 Avg Close $17.63 Range $15.91 - $19.18

Q2 2021

Shares 10,500 Value ($000) $131 Avg Close $12.50 Range $11.49 - $13.51

Q1 2021

Shares 10,500 Value ($000) $139 Avg Close $10.96 Range $9.08 - $13.19

Q1 2020

Shares 11,145 Value ($000) $78 Avg Close $10.20 Range $5.65 - $12.55

Q4 2019

Shares 47,400 Value ($000) $639 Avg Close $11.56 Range $10.85 - $12.76

Q3 2019

Shares 69,200 Value ($000) $846 Avg Close $11.47 Range $10.40 - $12.59

Q2 2019

Shares 116,413 Value ($000) $1,487 Avg Close $11.89 Range $10.57 - $12.61

Q1 2019

Shares 109,113 Value ($000) $1,374 Avg Close $12.79 Range $11.10 - $13.68

Q4 2018

Shares 126,013 Value ($000) $1,639 Avg Close $13.06 Range $10.45 - $14.49

Q3 2018

Shares 196,391 Value ($000) $3,035 Avg Close $14.06 Range $13.23 - $15.04

Q2 2018

Shares 162,582 Value ($000) $2,342 Avg Close $13.48 Range $12.40 - $14.39

Q1 2018

Shares 78,664 Value ($000) $1,094 Avg Close $13.11 Range $12.07 - $13.82

Q4 2017

Shares 83,364 Value ($000) $1,138 Avg Close $12.23 Range $11.19 - $13.71

Q3 2017

Shares 68,135 Value ($000) $917 Avg Close $10.81 Range $9.89 - $12.42

Q2 2017

Shares 63,629 Value ($000) $735 Avg Close $10.69 Range $10.06 - $11.72

Q1 2017

Shares 58,529 Value ($000) $659 Avg Close $9.89 Range $8.86 - $10.57

Q4 2016

Shares 54,224 Value ($000) $600 Avg Close $8.31 Range $6.83 - $10.68

Q3 2016

Shares 38,320 Value ($000) $319 Avg Close $7.02 Range $6.11 - $7.93

Q2 2016

Shares 38,320 Value ($000) $262 Avg Close $6.49 Range $5.83 - $6.90

Q1 2016

Shares 38,323 Value ($000) $275 Avg Close $6.30 Range $5.69 - $7.11

Q4 2015

Shares 14,457 Value ($000) $115 Avg Close $6.59 Range $5.47 - $7.44

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	110,468	$2,154	$18.60	$16.53 - $20.89
Q3 2025	135,240	$2,338	$17.86	$16.31 - $19.04
Q2 2025	131,992	$2,342	$16.11	$13.93 - $17.67
Q1 2025	103,359	$1,720	$17.63	$15.91 - $19.18
Q2 2021	10,500	$131	$12.50	$11.49 - $13.51
Q1 2021	10,500	$139	$10.96	$9.08 - $13.19
Q1 2020	11,145	$78	$10.20	$5.65 - $12.55
Q4 2019	47,400	$639	$11.56	$10.85 - $12.76
Q3 2019	69,200	$846	$11.47	$10.40 - $12.59
Q2 2019	116,413	$1,487	$11.89	$10.57 - $12.61
Q1 2019	109,113	$1,374	$12.79	$11.10 - $13.68
Q4 2018	126,013	$1,639	$13.06	$10.45 - $14.49
Q3 2018	196,391	$3,035	$14.06	$13.23 - $15.04
Q2 2018	162,582	$2,342	$13.48	$12.40 - $14.39
Q1 2018	78,664	$1,094	$13.11	$12.07 - $13.82
Q4 2017	83,364	$1,138	$12.23	$11.19 - $13.71
Q3 2017	68,135	$917	$10.81	$9.89 - $12.42
Q2 2017	63,629	$735	$10.69	$10.06 - $11.72
Q1 2017	58,529	$659	$9.89	$8.86 - $10.57
Q4 2016	54,224	$600	$8.31	$6.83 - $10.68
Q3 2016	38,320	$319	$7.02	$6.11 - $7.93
Q2 2016	38,320	$262	$6.49	$5.83 - $6.90
Q1 2016	38,323	$275	$6.30	$5.69 - $7.11
Q4 2015	14,457	$115	$6.59	$5.47 - $7.44