MDU RES GROUP INC

Ticker: MDU CUSIP: 552690109 Class: COM

STATE OF WISCONSIN INVESTMENT BOARD's Holding History (CIK: 0000854157)

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

Q4 2025

Shares 127,274 Value ($000) $2,484 Avg Close $19.57 Range $17.31 - $21.34

Q3 2025

Shares 153,798 Value ($000) $2,739 Avg Close $16.46 Range $15.63 - $17.87

Q2 2025

Shares 160,958 Value ($000) $2,683 Avg Close $16.45 Range $14.69 - $17.49

Q1 2025

Shares 186,685 Value ($000) $3,157 Avg Close $16.76 Range $15.90 - $18.33

Q4 2024

Shares 183,828 Value ($000) $3,313 Avg Close $16.91 Range $14.27 - $19.63

Q3 2024

Shares 46,857 Value ($000) $1,284 Avg Close $13.65 Range $12.67 - $14.89

Q2 2024

Shares 51,004 Value ($000) $1,280 Avg Close $13.17 Range $12.37 - $13.72

Q1 2024

Shares 15,425 Value ($000) $389 Avg Close $10.98 Range $9.86 - $13.32

Q4 2023

Shares 18,351 Value ($000) $363 Avg Close $9.95 Range $9.41 - $10.65

Q3 2023

Shares 24,177 Value ($000) $473 Avg Close $10.78 Range $10.08 - $11.69

Q2 2023

Shares 19,395 Value ($000) $406 Avg Close $10.43 Range $9.61 - $10.94

Q1 2023

Shares 25,616 Value ($000) $781 Avg Close $10.70 Range $9.98 - $11.37

Q4 2022

Shares 25,350 Value ($000) $769 Avg Close $10.27 Range $9.29 - $11.06

Q3 2022

Shares 37,693 Value ($000) $1,031 Avg Close $10.02 Range $8.94 - $11.08

Q2 2022

Shares 50,448 Value ($000) $1,362 Avg Close $9.15 Range $8.51 - $9.69

Q1 2022

Shares 14,482 Value ($000) $386 Avg Close $9.45 Range $8.60 - $10.74

Q4 2021

Shares 24,651 Value ($000) $760 Avg Close $9.99 Range $9.15 - $10.63

Q3 2021

Shares 25,001 Value ($000) $742 Avg Close $10.53 Range $9.83 - $11.13

Q2 2021

Shares 23,811 Value ($000) $746 Avg Close $10.95 Range $10.22 - $11.62

Q1 2021

Shares 25,285 Value ($000) $799 Avg Close $9.46 Range $8.38 - $10.66

Q4 2020

Shares 25,640 Value ($000) $675 Avg Close $8.05 Range $7.18 - $8.74

Q3 2020

Shares 26,720 Value ($000) $601 Avg Close $7.32 Range $6.58 - $8.03

Q2 2020

Shares 26,210 Value ($000) $581 Avg Close $7.03 Range $5.94 - $8.01

Q1 2020

Shares 26,990 Value ($000) $580 Avg Close $8.83 Range $4.81 - $10.26

Q4 2019

Shares 28,330 Value ($000) $842 Avg Close $9.10 Range $8.60 - $9.50

Q3 2019

Shares 27,850 Value ($000) $785 Avg Close $8.44 Range $7.93 - $9.12

Q2 2019

Shares 28,065 Value ($000) $724 Avg Close $7.99 Range $7.59 - $8.30

Q1 2019

Shares 36,229 Value ($000) $936 Avg Close $7.90 Range $7.22 - $8.40

Q4 2018

Shares 37,309 Value ($000) $889 Avg Close $7.88 Range $7.03 - $8.27

Q3 2018

Shares 37,309 Value ($000) $958 Avg Close $8.58 Range $7.77 - $9.02

Q2 2018

Shares 37,979 Value ($000) $1,089 Avg Close $8.49 Range $8.18 - $8.87

Q1 2018

Shares 38,973 Value ($000) $1,097 Avg Close $8.03 Range $7.29 - $8.53

Q4 2017

Shares 40,057 Value ($000) $1,077 Avg Close $8.04 Range $7.71 - $8.41

Q3 2017

Shares 39,545 Value ($000) $1,026 Avg Close $7.77 Range $7.44 - $8.20

Q2 2017

Shares 38,699 Value ($000) $1,014 Avg Close $7.92 Range $7.51 - $8.25

Q1 2017

Shares 38,699 Value ($000) $1,059 Avg Close $8.03 Range $7.53 - $8.67

Q4 2016

Shares 105,674 Value ($000) $3,040 Avg Close $7.89 Range $7.09 - $8.72

Q3 2016

Shares 124,117 Value ($000) $3,158 Avg Close $6.91 Range $6.46 - $7.47

Q2 2016

Shares 126,417 Value ($000) $3,034 Avg Close $6.12 Range $5.33 - $6.90

Q1 2016

Shares 135,317 Value ($000) $2,633 Avg Close $5.02 Range $4.40 - $5.57

Q4 2015

Shares 141,257 Value ($000) $2,588 Avg Close $5.10 Range $4.59 - $5.49

Q3 2015

Shares 145,437 Value ($000) $2,502 Avg Close $4.95 Range $4.48 - $5.44

Q2 2015

Shares 149,497 Value ($000) $2,920 Avg Close $5.79 Range $5.30 - $6.32

Q1 2015

Shares 145,517 Value ($000) $3,105 Avg Close $6.06 Range $5.47 - $6.65

Q4 2014

Shares 149,497 Value ($000) $3,513 Avg Close $6.84 Range $5.78 - $7.67

Q3 2014

Shares 140,967 Value ($000) $3,920 Avg Close $8.38 Range $7.36 - $9.47

Q2 2014

Shares 140,017 Value ($000) $4,915 Avg Close $9.15 Range $8.68 - $9.59

Q1 2014

Shares 134,977 Value ($000) $4,631 Avg Close $8.65 Range $7.84 - $9.29

Q4 2013

Shares 134,807 Value ($000) $4,118 Avg Close $7.80 Range $7.24 - $8.15

Q3 2013

Shares 138,837 Value ($000) $3,883 Avg Close $7.25 Range $6.78 - $7.90

Q2 2013

Shares 149,607 Value ($000) $3,876 Avg Close $6.58 Range $6.07 - $7.05

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	127,274	$2,484	$19.57	$17.31 - $21.34
Q3 2025	153,798	$2,739	$16.46	$15.63 - $17.87
Q2 2025	160,958	$2,683	$16.45	$14.69 - $17.49
Q1 2025	186,685	$3,157	$16.76	$15.90 - $18.33
Q4 2024	183,828	$3,313	$16.91	$14.27 - $19.63
Q3 2024	46,857	$1,284	$13.65	$12.67 - $14.89
Q2 2024	51,004	$1,280	$13.17	$12.37 - $13.72
Q1 2024	15,425	$389	$10.98	$9.86 - $13.32
Q4 2023	18,351	$363	$9.95	$9.41 - $10.65
Q3 2023	24,177	$473	$10.78	$10.08 - $11.69
Q2 2023	19,395	$406	$10.43	$9.61 - $10.94
Q1 2023	25,616	$781	$10.70	$9.98 - $11.37
Q4 2022	25,350	$769	$10.27	$9.29 - $11.06
Q3 2022	37,693	$1,031	$10.02	$8.94 - $11.08
Q2 2022	50,448	$1,362	$9.15	$8.51 - $9.69
Q1 2022	14,482	$386	$9.45	$8.60 - $10.74
Q4 2021	24,651	$760	$9.99	$9.15 - $10.63
Q3 2021	25,001	$742	$10.53	$9.83 - $11.13
Q2 2021	23,811	$746	$10.95	$10.22 - $11.62
Q1 2021	25,285	$799	$9.46	$8.38 - $10.66
Q4 2020	25,640	$675	$8.05	$7.18 - $8.74
Q3 2020	26,720	$601	$7.32	$6.58 - $8.03
Q2 2020	26,210	$581	$7.03	$5.94 - $8.01
Q1 2020	26,990	$580	$8.83	$4.81 - $10.26
Q4 2019	28,330	$842	$9.10	$8.60 - $9.50
Q3 2019	27,850	$785	$8.44	$7.93 - $9.12
Q2 2019	28,065	$724	$7.99	$7.59 - $8.30
Q1 2019	36,229	$936	$7.90	$7.22 - $8.40
Q4 2018	37,309	$889	$7.88	$7.03 - $8.27
Q3 2018	37,309	$958	$8.58	$7.77 - $9.02
Q2 2018	37,979	$1,089	$8.49	$8.18 - $8.87
Q1 2018	38,973	$1,097	$8.03	$7.29 - $8.53
Q4 2017	40,057	$1,077	$8.04	$7.71 - $8.41
Q3 2017	39,545	$1,026	$7.77	$7.44 - $8.20
Q2 2017	38,699	$1,014	$7.92	$7.51 - $8.25
Q1 2017	38,699	$1,059	$8.03	$7.53 - $8.67
Q4 2016	105,674	$3,040	$7.89	$7.09 - $8.72
Q3 2016	124,117	$3,158	$6.91	$6.46 - $7.47
Q2 2016	126,417	$3,034	$6.12	$5.33 - $6.90
Q1 2016	135,317	$2,633	$5.02	$4.40 - $5.57
Q4 2015	141,257	$2,588	$5.10	$4.59 - $5.49
Q3 2015	145,437	$2,502	$4.95	$4.48 - $5.44
Q2 2015	149,497	$2,920	$5.79	$5.30 - $6.32
Q1 2015	145,517	$3,105	$6.06	$5.47 - $6.65
Q4 2014	149,497	$3,513	$6.84	$5.78 - $7.67
Q3 2014	140,967	$3,920	$8.38	$7.36 - $9.47
Q2 2014	140,017	$4,915	$9.15	$8.68 - $9.59
Q1 2014	134,977	$4,631	$8.65	$7.84 - $9.29
Q4 2013	134,807	$4,118	$7.80	$7.24 - $8.15
Q3 2013	138,837	$3,883	$7.25	$6.78 - $7.90
Q2 2013	149,607	$3,876	$6.58	$6.07 - $7.05