MDU RES GROUP INC

Ticker: MDU CUSIP: 552690109 Class: COM

NISA INVESTMENT ADVISORS, LLC's Holding History (CIK: 0000937615)

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

Q4 2025

Shares 49,499 Value ($000) $973 Avg Close $19.57 Range $17.31 - $21.34

Q3 2025

Shares 51,261 Value ($000) $920 Avg Close $16.46 Range $15.63 - $17.87

Q2 2025

Shares 51,757 Value ($000) $870 Avg Close $16.45 Range $14.69 - $17.49

Q1 2025

Shares 52,488 Value ($000) $894 Avg Close $16.76 Range $15.90 - $18.33

Q4 2024

Shares 52,488 Value ($000) $953 Avg Close $16.91 Range $14.27 - $19.63

Q3 2024

Shares 52,488 Value ($000) $1,446 Avg Close $13.65 Range $12.67 - $14.89

Q2 2024

Shares 60,388 Value ($000) $1,523 Avg Close $13.17 Range $12.37 - $13.72

Q1 2024

Shares 51,488 Value ($000) $1,304 Avg Close $10.98 Range $9.86 - $13.32

Q4 2023

Shares 51,253 Value ($000) $1,015 Avg Close $9.95 Range $9.41 - $10.65

Q3 2023

Shares 52,253 Value ($000) $1,023 Avg Close $10.78 Range $10.08 - $11.69

Q2 2023

Shares 61,553 Value ($000) $1,289 Avg Close $10.43 Range $9.61 - $10.94

Q1 2023

Shares 61,553 Value ($000) $2 Avg Close $10.70 Range $9.98 - $11.37

Q4 2022

Shares 61,553 Value ($000) $2 Avg Close $10.27 Range $9.29 - $11.06

Q3 2022

Shares 61,553 Value ($000) $1,687 Avg Close $10.02 Range $8.94 - $11.08

Q2 2022

Shares 68,400 Value ($000) $1,846 Avg Close $9.15 Range $8.51 - $9.69

Q1 2022

Shares 56,400 Value ($000) $1,503 Avg Close $9.45 Range $8.60 - $10.74

Q4 2021

Shares 56,400 Value ($000) $1,656 Avg Close $9.99 Range $9.15 - $10.63

Q3 2021

Shares 56,400 Value ($000) $1,673 Avg Close $10.53 Range $9.83 - $11.13

Q2 2021

Shares 57,600 Value ($000) $1,805 Avg Close $10.95 Range $10.22 - $11.62

Q1 2021

Shares 56,400 Value ($000) $1,783 Avg Close $9.46 Range $8.38 - $10.66

Q4 2020

Shares 56,400 Value ($000) $1,486 Avg Close $8.05 Range $7.18 - $8.74

Q3 2020

Shares 56,400 Value ($000) $1,269 Avg Close $7.32 Range $6.58 - $8.03

Q2 2020

Shares 63,400 Value ($000) $1,406 Avg Close $7.03 Range $5.94 - $8.01

Q1 2020

Shares 61,260 Value ($000) $1,317 Avg Close $8.83 Range $4.81 - $10.26

Q4 2019

Shares 81,500 Value ($000) $2,421 Avg Close $9.10 Range $8.60 - $9.50

Q3 2019

Shares 81,500 Value ($000) $2,297 Avg Close $8.44 Range $7.93 - $9.12

Q2 2019

Shares 86,500 Value ($000) $2,232 Avg Close $7.99 Range $7.59 - $8.30

Q1 2019

Shares 82,500 Value ($000) $2,131 Avg Close $7.90 Range $7.22 - $8.40

Q4 2018

Shares 94,800 Value ($000) $2,260 Avg Close $7.88 Range $7.03 - $8.27

Q3 2018

Shares 78,500 Value ($000) $2,017 Avg Close $8.58 Range $7.77 - $9.02

Q2 2018

Shares 87,915 Value ($000) $2,521 Avg Close $8.49 Range $8.18 - $8.87

Q1 2018

Shares 82,755 Value ($000) $2,284 Avg Close $8.03 Range $7.29 - $8.53

Q4 2017

Shares 92,255 Value ($000) $2,480 Avg Close $8.04 Range $7.71 - $8.41

Q3 2017

Shares 101,255 Value ($000) $2,628 Avg Close $7.77 Range $7.44 - $8.20

Q2 2017

Shares 92,255 Value ($000) $2,447 Avg Close $7.92 Range $7.51 - $8.25

Q1 2017

Shares 92,380 Value ($000) $2,528 Avg Close $8.03 Range $7.53 - $8.67

Q4 2016

Shares 93,840 Value ($000) $2,700 Avg Close $7.89 Range $7.09 - $8.72

Q3 2016

Shares 109,240 Value ($000) $2,779 Avg Close $6.91 Range $6.46 - $7.47

Q2 2016

Shares 95,340 Value ($000) $2,288 Avg Close $6.12 Range $5.33 - $6.90

Q1 2016

Shares 96,440 Value ($000) $1,877 Avg Close $5.02 Range $4.40 - $5.57

Q4 2015

Shares 94,640 Value ($000) $1,734 Avg Close $5.10 Range $4.59 - $5.49

Q3 2015

Shares 155,640 Value ($000) $2,684 Avg Close $4.95 Range $4.48 - $5.44

Q2 2015

Shares 96,140 Value ($000) $1,878 Avg Close $5.79 Range $5.30 - $6.32

Q1 2015

Shares 96,340 Value ($000) $2,056 Avg Close $6.06 Range $5.47 - $6.65

Q4 2014

Shares 86,740 Value ($000) $2,038 Avg Close $6.84 Range $5.78 - $7.67

Q3 2014

Shares 86,940 Value ($000) $2,418 Avg Close $8.38 Range $7.36 - $9.47

Q2 2014

Shares 89,940 Value ($000) $3,157 Avg Close $9.15 Range $8.68 - $9.59

Q1 2014

Shares 89,940 Value ($000) $3,086 Avg Close $8.65 Range $7.84 - $9.29

Q4 2013

Shares 86,940 Value ($000) $2,656 Avg Close $7.80 Range $7.24 - $8.15

Q3 2013

Shares 86,940 Value ($000) $2,432 Avg Close $7.25 Range $6.78 - $7.90

Q2 2013

Shares 86,940 Value ($000) $2,253 Avg Close $6.58 Range $6.07 - $7.05

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	49,499	$973	$19.57	$17.31 - $21.34
Q3 2025	51,261	$920	$16.46	$15.63 - $17.87
Q2 2025	51,757	$870	$16.45	$14.69 - $17.49
Q1 2025	52,488	$894	$16.76	$15.90 - $18.33
Q4 2024	52,488	$953	$16.91	$14.27 - $19.63
Q3 2024	52,488	$1,446	$13.65	$12.67 - $14.89
Q2 2024	60,388	$1,523	$13.17	$12.37 - $13.72
Q1 2024	51,488	$1,304	$10.98	$9.86 - $13.32
Q4 2023	51,253	$1,015	$9.95	$9.41 - $10.65
Q3 2023	52,253	$1,023	$10.78	$10.08 - $11.69
Q2 2023	61,553	$1,289	$10.43	$9.61 - $10.94
Q1 2023	61,553	$2	$10.70	$9.98 - $11.37
Q4 2022	61,553	$2	$10.27	$9.29 - $11.06
Q3 2022	61,553	$1,687	$10.02	$8.94 - $11.08
Q2 2022	68,400	$1,846	$9.15	$8.51 - $9.69
Q1 2022	56,400	$1,503	$9.45	$8.60 - $10.74
Q4 2021	56,400	$1,656	$9.99	$9.15 - $10.63
Q3 2021	56,400	$1,673	$10.53	$9.83 - $11.13
Q2 2021	57,600	$1,805	$10.95	$10.22 - $11.62
Q1 2021	56,400	$1,783	$9.46	$8.38 - $10.66
Q4 2020	56,400	$1,486	$8.05	$7.18 - $8.74
Q3 2020	56,400	$1,269	$7.32	$6.58 - $8.03
Q2 2020	63,400	$1,406	$7.03	$5.94 - $8.01
Q1 2020	61,260	$1,317	$8.83	$4.81 - $10.26
Q4 2019	81,500	$2,421	$9.10	$8.60 - $9.50
Q3 2019	81,500	$2,297	$8.44	$7.93 - $9.12
Q2 2019	86,500	$2,232	$7.99	$7.59 - $8.30
Q1 2019	82,500	$2,131	$7.90	$7.22 - $8.40
Q4 2018	94,800	$2,260	$7.88	$7.03 - $8.27
Q3 2018	78,500	$2,017	$8.58	$7.77 - $9.02
Q2 2018	87,915	$2,521	$8.49	$8.18 - $8.87
Q1 2018	82,755	$2,284	$8.03	$7.29 - $8.53
Q4 2017	92,255	$2,480	$8.04	$7.71 - $8.41
Q3 2017	101,255	$2,628	$7.77	$7.44 - $8.20
Q2 2017	92,255	$2,447	$7.92	$7.51 - $8.25
Q1 2017	92,380	$2,528	$8.03	$7.53 - $8.67
Q4 2016	93,840	$2,700	$7.89	$7.09 - $8.72
Q3 2016	109,240	$2,779	$6.91	$6.46 - $7.47
Q2 2016	95,340	$2,288	$6.12	$5.33 - $6.90
Q1 2016	96,440	$1,877	$5.02	$4.40 - $5.57
Q4 2015	94,640	$1,734	$5.10	$4.59 - $5.49
Q3 2015	155,640	$2,684	$4.95	$4.48 - $5.44
Q2 2015	96,140	$1,878	$5.79	$5.30 - $6.32
Q1 2015	96,340	$2,056	$6.06	$5.47 - $6.65
Q4 2014	86,740	$2,038	$6.84	$5.78 - $7.67
Q3 2014	86,940	$2,418	$8.38	$7.36 - $9.47
Q2 2014	89,940	$3,157	$9.15	$8.68 - $9.59
Q1 2014	89,940	$3,086	$8.65	$7.84 - $9.29
Q4 2013	86,940	$2,656	$7.80	$7.24 - $8.15
Q3 2013	86,940	$2,432	$7.25	$6.78 - $7.90
Q2 2013	86,940	$2,253	$6.58	$6.07 - $7.05