SEC Form SC 13D filed by MDU Resources Group Inc.
| * | The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter
              disclosures provided in a prior cover page. | 
| CUSIP No. 552690109 | |||||||||||
| 1. | Name of Reporting Person: CORVEX MANAGEMENT LP | ||||||||||
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions): (a) ☐ (b) ☒ | ||||||||||
| 3. | SEC Use Only: | ||||||||||
| 4. | Source of Funds (See Instructions): AF | ||||||||||
| 5. | Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e): ☐ | ||||||||||
| 6. | Citizenship or Place of Organization: DELAWARE | ||||||||||
| Number of Shares Beneficially Owned by Each Reporting Person With | 7. | Sole Voting Power: 10,147,041* | |||||||||
| 8. | Shared Voting Power: 0 | ||||||||||
| 9. | Sole Dispositive Power: 10,147,041* | ||||||||||
| 10. | Shared Dispositive Power: 0 | ||||||||||
| 11. | Aggregate Amount Beneficially Owned by Each Reporting Person: 10,147,041* | ||||||||||
| 12. | Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions): ☐ | ||||||||||
| 13. | Percent of Class Represented by Amount in Row (11): 4.99%* | ||||||||||
| 14. | Type of Reporting Person (See Instructions): PN, IA | ||||||||||
| * | In addition, accounts of certain private investment funds for which Corvex Management LP (“Corvex”) acts as investment adviser have entered into cash-settled total return swaps, representing economic exposure to 1,194,435 shares, or 0.59% of the outstanding shares, as described in Item 6. | ||||||||||
| CUSIP No. 552690109 | |||||||||||
| 1. | Name of Reporting Person: KEITH MEISTER | ||||||||||
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions): (a) ☐ (b) ☒ | ||||||||||
| 3. | SEC Use Only: | ||||||||||
| 4. | Source of Funds (See Instructions): AF | ||||||||||
| 5. | Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e): ☐ | ||||||||||
| 6. | Citizenship or Place of Organization: United States | ||||||||||
| Number of Shares Beneficially Owned by Each Reporting Person With | 7. | Sole Voting Power: 10,147,041* | |||||||||
| 8. | Shared Voting Power: 0 | ||||||||||
| 9. | Sole Dispositive Power: 10,147,041* | ||||||||||
| 10. | Shared Dispositive Power: 0 | ||||||||||
| 11. | Aggregate Amount Beneficially Owned by Each Reporting Person: 10,147,041* | ||||||||||
| 12. | Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions): ☐ | ||||||||||
| 13. | Percent of Class Represented by Amount in Row (11): 4.99%* | ||||||||||
| 14. | Type of Reporting Person (See Instructions): IN, HC | ||||||||||
| * | In addition, accounts of certain private investment funds for which Corvex acts as investment adviser have entered into cash-settled total return swaps representing economic exposure to 1,194,435
              shares, or 0.59% of the outstanding shares, as described in Item 6. | ||||||||||
| Date: August 8, 2022 | CORVEX MANAGEMENT LP | |||||
| By: | /s/ Keith Meister  | |||||
| Keith Meister | ||||||
| Managing Partner | ||||||
| Date: August 8, 2022 | KEITH MEISTER | |||||
| By: | /s/ Keith Meister  | |||||
| Keith Meister | ||||||
| Date: August 8, 2022 | CORVEX MANAGEMENT LP | |||||
| By: | /s/ Keith Meister  | |||||
| Name: Keith Meister | ||||||
| Title: Managing Partner | ||||||
| Date: August 8, 2022 | KEITH MEISTER | |||||
| By: | /s/ Keith Meister  | |||||
| NATURE OF TRANSACTION | DATE OF TRANSACTION | AMOUNT OF SECURITIES | PRICE PER SHARE1 | |||
| Purchase of Common Stock | 6/9/2022 |  33,162 | 27.30 | |||
| Purchase of Common Stock | 6/10/2022 |  116,700 | 26.95 | |||
| Purchase of Common Stock | 6/13/2022 |  484,501 | 26.09 | |||
| Purchase of Common Stock | 6/14/2022 |  248,058 | 25.77 | |||
| Purchase of Common Stock | 6/15/2022 |  141,200 | 26.00 | |||
| Purchase of Common Stock | 6/16/2022 |  286,450 | 25.48 | |||
| Purchase of Common Stock | 6/17/2022 |  360,748 | 25.94 | |||
| Purchase of Common Stock | 6/21/2022 |  168,800 | 26.36 | |||
| Purchase of Common Stock | 6/22/2022 |  159,100 | 26.52 | |||
| Purchase of Common Stock | 6/23/2022 |  71,601 | 27.12 | |||
| Purchase of Common Stock | 6/27/2022 |  200 | 27.67 | |||
| Purchase of Common Stock | 6/29/2022 |  85,000 | 26.94 | |||
| Purchase of Common Stock | 6/30/2022 |  74,900 | 26.92 | |||
| Purchase of Common Stock | 7/1/2022 |  31,026 | 26.97 | |||
| Purchase of Common Stock | 7/5/2022 |  163,600 | 26.33 | |||
| Purchase of Common Stock | 7/6/2022 |  100,477 | 26.71 | |||
| Purchase of Common Stock | 7/7/2022 |  150,601 | 26.86 | |||
| Purchase of Common Stock | 7/8/2022 |  110,291 | 26.75 | |||
| Purchase of Common Stock | 7/11/2022 |  27,500 | 26.71 | |||
| Purchase of Common Stock | 7/12/2022 |  104,815 | 26.77 | |||
| Purchase of Common Stock | 7/13/2022 |  183,600 | 26.64 | |||
| Purchase of Common Stock | 7/14/2022 |  100,900 | 26.54 | |||
| Purchase of Common Stock | 7/15/2022 |  112,100 | 26.83 | |||
| Purchase of Common Stock | 7/18/2022 |  86,856 | 26.72 | |||
| Purchase of Common Stock | 7/19/2022 |  60,000 | 27.01 | |||
| Purchase of Common Stock | 7/20/2022 |  50,000 | 26.74 | |||
| Purchase of Common Stock | 7/21/2022 |  45,000 | 26.74 | |||
| Purchase of Common Stock | 7/22/2022 |  45,000 | 26.88 | |||
| Purchase of Common Stock | 7/25/2022 |  13,700 | 27.08 | |||
| Purchase of Common Stock | 7/26/2022 |  33,300 | 27.49 |