MDU · Mdu Resources Group Inc

Pursuant to the issuer's director compensation policy, the reporting person elected to receive common stock in lieu of the cash compensation retainer for service on the issuer's board of directors.

Pursuant to the issuer's director compensation policy, the reporting person elected to receive common stock in lieu of the cash compensation retainer for service on the issuer's board of directors.

Includes 77 additional shares acquired through dividend reinvestment since the reporting person's last Form 4.

Pursuant to the issuer's director compensation policy, the reporting person elected to receive common stock in lieu of the cash compensation retainer for service on the issuer's board of directors.

Pursuant to the issuer's director compensation policy, the reporting person elected to receive common stock in lieu of the cash compensation retainer for service on the issuer's board of directors.

Shares withheld in payment of tax liability in connection with the vesting of a previously reported award of RSUs, which vested December 31, 2025.

Price is equal to the closing price of a share of Common Stock on February 18, 2026.

Including 18,160 net shares, which vested on December 31, 2025.

Shares withheld in payment of tax liability in connection with the vesting of a previously reported award of RSUs, which vested December 31, 2025.

Price is equal to the closing price of a share of Common Stock on February 18, 2026.

Includes (a) Common Stock, including 52,678 net shares, which vested on December 31, 2025; and (b) shares of Common Stock acquired through dividend reinvestment since the reporting person's most recent Form 4.

Shares withheld in payment of tax liability in connection with the vesting of a previously reported award of RSUs, which vested December 31, 2025.

Price is equal to the closing price of a share of Common Stock on February 18, 2026.

Including 15,981 net shares, which vested on December 31, 2025.

Shares withheld in payment of tax liability in connection with the vesting of a previously reported award of RSUs, which vested December 31, 2025.

Price is equal to the closing price of a share of Common Stock on February 18, 2026.

Including 12,169 net shares, which vested on December 31, 2025.

Shares withheld in payment of tax liability in connection with the vesting of a previously reported award of RSUs, which vested December 31, 2025.

Price is equal to the closing price of a share of Common Stock on February 18, 2026.

Includes (a) Common Stock, including 15,633 net shares, which vested on December 31, 2025; and (b) shares of Common Stock acquired through dividend reinvestment since the reporting person's most recent Form 4.

Shares withheld in payment of tax liability in connection with the vesting of a previously reported award of RSUs, which vested December 31, 2025.

Price is equal to the closing price of a share of Common Stock on February 18, 2026.

Includes (a) Common Stock, including 51,401 net shares, which vested on December 31, 2025; and (b) shares of Common Stock acquired through dividend reinvestment since the reporting person's most recent Form 4.

Represents restricted stock units that will vest on December 31, 2028, subject to the reporting person's continued employment through the vesting date.

Represents restricted stock units that will vest on December 31, 2028, subject to the reporting person's continued employment through the vesting date.

Represents restricted stock units (RSUs) that will vest on December 31, 2028, subject to the reporting person's continued employment through the vesting date.

Includes (a) Common Stock, including 52,678 net shares, which vested on December 31, 2025; and (b) shares of Common Stock acquired through dividend reinvestment since the reporting person's most recent Form 4.

Represents restricted stock units (RSUs) that will vest on December 31, 2028, subject to the reporting person's continued employment through the vesting date.

Including 18,160 net shares, which vested on December 31, 2025.

Represents restricted stock units (RSUs) that will vest on December 31, 2028, subject to the reporting person's continued employment through the vesting date.

Including 12,169 net shares, which vested on December 31, 2025.

Represents restricted stock units (RSUs) that will vest on December 31, 2028, subject to the reporting person's continued employment through the vesting date.

Includes (a) Common Stock, including 15,633 net shares, which vested on December 31, 2025; and (b) shares of Common Stock acquired through dividend reinvestment since the reporting person's most recent Form 4.

Represents restricted stock units (RSUs) that will vest on December 31, 2028, subject to the reporting person's continued employment through the vesting date.

Including 15,981 net shares, which vested on December 31, 2025.

Represents restricted stock units (RSUs) that will vest on December 31, 2028, subject to the reporting person's continued employment through the vesting date.

Includes (a) Common Stock, including 51,401 net shares, which vested on December 31, 2025; and (b) shares of Common Stock acquired through dividend reinvestment since the reporting person's most recent Form 4.

Mr. Kelley purchased these shares in an open market transaction.

Pursuant to the issuer's director compensation policy, the reporting person elected to receive common stock in lieu of the cash compensation retainer for service on the issuer's board of directors.

Pursuant to the issuer's director compensation policy, the reporting person elected to receive common stock in lieu of the cash compensation retainer for service on the issuer's board of directors.

Pursuant to the issuer's director compensation policy, the reporting person elected to receive common stock in lieu of the cash compensation retainer for service on the issuer's board of directors.

Pursuant to the issuer's director compensation policy, the reporting person elected to receive common stock in lieu of the cash compensation retainer for service on the issuer's board of directors.

Mr. Vollmer purchased these shares in an open market transaction.

Mr. Vollmer purchased these shares in an open market transaction.

Pursuant to the issuer's director compensation policy, the reporting person elected to receive common stock in lieu of the cash compensation retainer for service on the issuer's board of directors.

Pursuant to the issuer's director compensation policy, the reporting person elected to receive common stock in lieu of the cash compensation retainer for service on the issuer's board of directors.

The reporting person's 401(k) was inadvertently rebalanced on May 15, 2025, resulting in the inadvertent purchase of additional shares of the issuer's common stock on May 15, 2025.

Pursuant to the issuer's director compensation policy, the reporting person elected to receive common stock in lieu of the cash compensation retainer for service on the issuer's board of directors.

Pursuant to the issuer's director compensation policy, the reporting person elected to receive common stock in lieu of the cash compensation retainer for service on the issuer's board of directors.

Represents restricted stock units that will vest on December 31, 2027, subject to the reporting person's continued employment through the vesting date.

Shares withheld in payment of tax liability in connection with the vesting of a previously reported award of RSUs, which vested December 31, 2024.

Price is equal to the closing price of a share of the Company's Common Stock on February 12, 2025.

Includes (a) common stock, including 43,263 net shares received on vesting of award on December 31, 2024; (b) RSUs that were adjusted from certain previously-reported grants of RSUs in connection with the completion of the separation and distribution of Everus Construction Group, Inc., the issuer's former construction services business, to the issuer's stockholders, on October 31, 2024; and (c) shares of common stock acquired through dividend reinvestment since the reporting person's most recent Form 4.

Represents restricted stock units (RSUs) that will vest on December 31, 2027, subject to the reporting person's continued employment through the vesting date.

Includes (a) common stock, including 10,828 net shares received on vesting of award on December 31, 2024; and (b) RSUs that were adjusted from certain previously-reported grants of RSUs in connection with the completion of the separation and distribution of Everus Construction Group, Inc., the issuer's former construction services business, to the issuer's stockholders, on October 31, 2024.

Shares withheld in payment of tax liability in connection with the vesting of a previously-reported award of RSUs, which vested on February 12, 2025.

Price is equal to the closing price of a share of the Company's Common Stock on February 12, 2025.

Includes (a) common stock, including 43,376 net shares received on vesting of award on December 31, 2024; (b) RSUs that were adjusted from certain previously-reported grants of RSUs in connection with the completion of the separation and distribution of Everus Construction Group, Inc., the issuer's former construction services business, to the issuer's stockholders, on October 31, 2024; and (c) shares of common stock acquired through dividend reinvestment since the reporting person's most recent Form 4.

Shares withheld in payment of tax liability in connection with the vesting of a previously reported award of RSUs, which vested December 31, 2024.

Price is equal to the closing price of a share of the Company's Common Stock on February 12, 2025.

Includes (a) common stock, including 10,828 net shares received on vesting of award on December 31, 2024; and (b) RSUs that were adjusted from certain previously-reported grants of RSUs in connection with the completion of the separation and distribution of Everus Construction Group, Inc., the issuer's former construction services business, to the issuer's stockholders, on October 31, 2024.

Represents restricted stock units (RSUs) that will vest on December 31, 2027, subject to the reporting person's continued employment through the vesting date.

Includes (a) common stock, including 9,660 net shares received on vesting of award on December 31, 2024; and (b) RSUs that were adjusted from certain previously-reported grants of RSUs in connection with the completion of the separation and distribution of Everus Construction Group, Inc., the issuer's former construction services business, to the issuer's stockholders, on October 31, 2024.

Shares withheld in payment of tax liability in connection with the vesting of a previously reported award of RSUs, which vested December 31, 2024.

Price is equal to the closing price of a share of the Company's Common Stock on February 12, 2025.

Includes (a) common stock, including 9,660 net shares received on vesting of award on December 31, 2024; and (b) RSUs that were adjusted from certain previously-reported grants of RSUs in connection with the completion of the separation and distribution of Everus Construction Group, Inc., the issuer's former construction services business, to the issuer's stockholders, on October 31, 2024.

Represents restricted stock units (RSUs) that will vest on December 31, 2027, subject to the reporting person's continued employment through the vesting date.

Includes (a) common stock, including 43,263 net shares received on vesting of award on December 31, 2024; (b) RSUs that were adjusted from certain previously-reported grants of RSUs in connection with the completion of the separation and distribution of Everus Construction Group, Inc., the issuer's former construction services business, to the issuer's stockholders, on October 31, 2024; and (c) shares of common stock acquired through dividend reinvestment since the reporting person's most recent Form 4.

Shares withheld in payment of tax liability in connection with the vesting of a previously reported award of RSUs, which vested December 31, 2024.

Price is equal to the closing price of a share of the Company's Common Stock on February 12, 2025.

Includes (a) common stock, including 13,920 net shares received on vesting of award on December 31, 2024; (b) RSUs that were adjusted from certain previously-reported grants of RSUs in connection with the completion of the separation and distribution of Everus Construction Group, Inc., the issuer's former construction services business, to the issuer's stockholders, on October 31, 2024; and (c) shares of common stock acquired through dividend reinvestment since the reporting person's most recent Form 4.

Represents restricted stock units (RSUs) that will vest on December 31, 2027, subject to the reporting person's continued employment through the vesting date.

Includes (a) common stock, including 13,920 net shares received on vesting of award on December 31, 2024; (b) RSUs that were adjusted from certain previously-reported grants of RSUs in connection with the completion of the separation and distribution of Everus Construction Group, Inc., the issuer's former construction services business, to the issuer's stockholders, on October 31, 2024; and (c) shares of common stock acquired through dividend reinvestment since the reporting person's most recent Form 4.