NOG

nog-202602250001104485FALSEFebruary 25, 20264350 Baker Road, Suite 400MinnetonkaMinnesota00011044852026-02-252026-02-25

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 25, 2026

NORTHERN OIL AND GAS, INC.

(Exact name of Registrant as specified in its charter) Delaware 001-33999 95-3848122

(State or other jurisdiction of incorporation) (Commission File Number) (IRS Employer Identification No.)

4350 Baker Road, Suite 400 Minnetonka, Minnesota 55343 (Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code   (952) 476-9800

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, par value $0.001NOGNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02. Results of Operations and Financial Condition.

On February 25, 2026, Northern Oil and Gas, Inc. issued a press release announcing 2025 fourth quarter and full year financial and operating results. A copy of the press release is furnished as Exhibit 99.1 hereto.

Item 9.01.    Financial Statements and Exhibits.

(d) Exhibits.

Exhibit NumberDescription 99.1 Press release of Northern Oil and Gas, Inc., dated February 25, 2026 104The cover page from this Current Report on Form 8-K, formatted in inline XBRL

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: February 25, 2026NORTHERN OIL AND GAS, INC. By /s/ Erik J. Romslo Erik J. Romslo Chief Legal Officer and Secretary

nog-202602100001104485FALSE00011044852026-02-102026-02-10

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 10, 2026

NORTHERN OIL AND GAS, INC.

(Exact name of Registrant as specified in its charter) Delaware 001-33999 95-3848122

(State or other jurisdiction of incorporation) (Commission File Number) (IRS Employer Identification No.)

4350 Baker Road, Suite 400 Minnetonka, Minnesota 55343 (Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code   (952) 476-9800

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, par value $0.001NOGNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02.    Results of Operations and Financial Condition.

On February 10, 2026, Northern Oil and Gas, Inc. issued a press release that includes preliminary financial and operating results for the fourth quarter of 2025. A copy of the press release is furnished as Exhibit 99.1 hereto.

Item 9.01.    Financial Statements and Exhibits.

Exhibit NumberDescription 99.1 Press release of Northern Oil and Gas, Inc., dated February 10, 2026. 104The cover page from this Current Report on Form 8-K, formatted in Inline XBRL

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: February 10, 2026NORTHERN OIL AND GAS, INC. By /s/ Erik J. Romslo Erik J. Romslo Chief Legal Officer and Secretary

nog-202511060001104485FALSE00011044852025-11-062025-11-06

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 6, 2025

NORTHERN OIL AND GAS, INC.

(Exact name of Registrant as specified in its charter) Delaware 001-33999 95-3848122

(State or other jurisdiction of incorporation) (Commission File Number) (IRS Employer Identification No.)

4350 Baker Road, Suite 400 Minnetonka, Minnesota 55343 (Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code   (952) 476-9800

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, par value $0.001NOGNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02.    Results of Operations and Financial Condition.

On November 6, 2025, Northern Oil and Gas, Inc. issued a press release announcing 2025 third quarter financial and operating results. A copy of the press release is furnished as Exhibit 99.1 hereto.

Item 9.01.    Financial Statements and Exhibits.

Exhibit NumberDescription 99.1 Press release of Northern Oil and Gas, Inc., dated November 6, 2025. 104The cover page from this Current Report on Form 8-K, formatted in Inline XBRL

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: November 6, 2025NORTHERN OIL AND GAS, INC. By /s/ Erik J. Romslo Erik J. Romslo Chief Legal Officer and Secretary

nog-202510210001104485FALSE00011044852025-10-212025-10-21

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 21, 2025

NORTHERN OIL AND GAS, INC.

(Exact name of Registrant as specified in its charter) Delaware 001-33999 95-3848122

(State or other jurisdiction of incorporation) (Commission File Number) (IRS Employer Identification No.)

4350 Baker Road, Suite 400 Minnetonka, Minnesota 55343 (Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code   (952) 476-9800

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, par value $0.001NOGNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02.    Results of Operations and Financial Condition.

On October 21, 2025, Northern Oil and Gas, Inc. issued a press release that includes preliminary financial and operating results for the third quarter of 2025. A copy of the press release is furnished as Exhibit 99.1 hereto.

Item 9.01.    Financial Statements and Exhibits.

Exhibit NumberDescription 99.1 Press release of Northern Oil and Gas, Inc., dated October 21, 2025. 104The cover page from this Current Report on Form 8-K, formatted in Inline XBRL

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: October 21, 2025NORTHERN OIL AND GAS, INC. By /s/ Erik J. Romslo Erik J. Romslo Chief Legal Officer and Secretary

nog-202507310001104485FALSE00011044852025-07-312025-07-31

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 31, 2025

NORTHERN OIL AND GAS, INC.

(Exact name of Registrant as specified in its charter) Delaware 001-33999 95-3848122

(State or other jurisdiction of incorporation) (Commission File Number) (IRS Employer Identification No.)

4350 Baker Road, Suite 400 Minnetonka, Minnesota 55343 (Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code   (952) 476-9800

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, par value $0.001NOGNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02.    Results of Operations and Financial Condition.

On July 31, 2025, Northern Oil and Gas, Inc. issued a press release announcing 2025 second quarter financial and operating results. A copy of the press release is furnished as Exhibit 99.1 hereto.

Item 9.01.    Financial Statements and Exhibits.

Exhibit NumberDescription 99.1 Press release of Northern Oil and Gas, Inc., dated July 31, 2025. 104The cover page from this Current Report on Form 8-K, formatted in Inline XBRL

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: July 31, 2025NORTHERN OIL AND GAS, INC. By /s/ Erik J. Romslo Erik J. Romslo Chief Legal Officer and Secretary

nog-202507240001104485FALSE00011044852025-07-242025-07-24

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 24, 2025

NORTHERN OIL AND GAS, INC.

(Exact name of Registrant as specified in its charter) Delaware 001-33999 95-3848122

(State or other jurisdiction of incorporation) (Commission File Number) (IRS Employer Identification No.)

4350 Baker Road, Suite 400 Minnetonka, Minnesota 55343 (Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code   (952) 476-9800

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, par value $0.001NOGNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02.    Results of Operations and Financial Condition.

On July 24, 2025, Northern Oil and Gas, Inc. issued a press release that includes preliminary financial and operating results for the second quarter of 2025. A copy of the press release is furnished as Exhibit 99.1 hereto.

Item 9.01.    Financial Statements and Exhibits.

Exhibit NumberDescription 99.1 Press release of Northern Oil and Gas, Inc., dated July 24, 2025. 104The cover page from this Current Report on Form 8-K, formatted in Inline XBRL

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: July 24, 2025NORTHERN OIL AND GAS, INC. By /s/ Erik J. Romslo Erik J. Romslo Chief Legal Officer and Secretary

nog-202504290001104485FALSE00011044852025-04-292025-04-29

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 29, 2025

NORTHERN OIL AND GAS, INC.

(Exact name of Registrant as specified in its charter) Delaware 001-33999 95-3848122

(State or other jurisdiction of incorporation) (Commission File Number) (IRS Employer Identification No.)

4350 Baker Road, Suite 400 Minnetonka, Minnesota 55343 (Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code   (952) 476-9800

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, par value $0.001NOGNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02.    Results of Operations and Financial Condition.

On April 29, 2025, Northern Oil and Gas, Inc. issued a press release announcing 2025 first quarter financial and operating results. A copy of the press release is furnished as Exhibit 99.1 hereto.

Item 9.01.    Financial Statements and Exhibits.

Exhibit NumberDescription 99.1 Press release of Northern Oil and Gas, Inc., dated April 29, 2025. 104The cover page from this Current Report on Form 8-K, formatted in Inline XBRL

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: April 29, 2025NORTHERN OIL AND GAS, INC. By /s/ Erik J. Romslo Erik J. Romslo Chief Legal Officer and Secretary

nog-202504160001104485FALSE00011044852025-04-162025-04-16

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 16, 2025

NORTHERN OIL AND GAS, INC.

(Exact name of Registrant as specified in its charter) Delaware 001-33999 95-3848122

(State or other jurisdiction of incorporation) (Commission File Number) (IRS Employer Identification No.)

4350 Baker Road, Suite 400 Minnetonka, Minnesota 55343 (Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code   (952) 476-9800

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, par value $0.001NOGNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02.    Results of Operations and Financial Condition.

On April 16, 2025, Northern Oil and Gas, Inc. issued a press release that includes preliminary financial and operating results for the first quarter of 2025. A copy of the press release is furnished as Exhibit 99.1 hereto.

Item 9.01.    Financial Statements and Exhibits.

Exhibit NumberDescription 99.1 Press release of Northern Oil and Gas, Inc., dated April 16, 2025. 104The cover page from this Current Report on Form 8-K, formatted in Inline XBRL

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: April 16, 2025NORTHERN OIL AND GAS, INC. By /s/ Erik J. Romslo Erik J. Romslo Chief Legal Officer and Secretary

nog-202502190001104485FALSEFebruary 19, 20254350 Baker Road, Suite 400MinnetonkaMinnesota00011044852025-02-192025-02-19

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 19, 2025

NORTHERN OIL AND GAS, INC.

(Exact name of Registrant as specified in its charter) Delaware 001-33999 95-3848122

(State or other jurisdiction of incorporation) (Commission File Number) (IRS Employer Identification No.)

4350 Baker Road, Suite 400 Minnetonka, Minnesota 55343 (Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code   (952) 476-9800

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, par value $0.001NOGNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02. Results of Operations and Financial Condition.

On February 19, 2025, Northern Oil and Gas, Inc. issued a press release announcing 2024 fourth quarter and full year financial and operating results. A copy of the press release is furnished as Exhibit 99.1 hereto.

Item 9.01.    Financial Statements and Exhibits.

(d) Exhibits.

Exhibit NumberDescription 99.1 Press release of Northern Oil and Gas, Inc., dated February 19, 2025 104The cover page from this Current Report on Form 8-K, formatted in inline XBRL

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: February 19, 2025NORTHERN OIL AND GAS, INC. By /s/ Erik J. Romslo Erik J. Romslo Chief Legal Officer and Secretary

nog-202502120001104485FALSE00011044852025-02-122025-02-13

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 12, 2025

NORTHERN OIL AND GAS, INC.

(Exact name of Registrant as specified in its charter) Delaware 001-33999 95-3848122

(State or other jurisdiction of incorporation) (Commission File Number) (IRS Employer Identification No.)

4350 Baker Road, Suite 400 Minnetonka, Minnesota 55343 (Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code   (952) 476-9800

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, par value $0.001NOGNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02.    Results of Operations and Financial Condition.

On February 12, 2025, Northern Oil and Gas, Inc. issued a press release that includes preliminary financial and operating results for the fourth quarter and full year 2024. A copy of the press release is furnished as Exhibit 99.1 hereto.

Item 9.01.    Financial Statements and Exhibits.

Exhibit NumberDescription 99.1 Press release of Northern Oil and Gas, Inc., dated February 12, 2025. 104The cover page from this Current Report on Form 8-K, formatted in Inline XBRL

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: February 13, 2025NORTHERN OIL AND GAS, INC. By /s/ Erik J. Romslo Erik J. Romslo Chief Legal Officer and Secretary

nog-202501280001104485FALSE00011044852025-01-282025-01-28

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 28, 2025

NORTHERN OIL AND GAS, INC.

(Exact name of Registrant as specified in its charter) Delaware 001-33999 95-3848122

(State or other jurisdiction of incorporation) (Commission File Number) (IRS Employer Identification No.)

4350 Baker Road, Suite 400 Minnetonka, Minnesota 55343 (Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code   (952) 476-9800

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, par value $0.001NOGNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02.    Results of Operations and Financial Condition.

On January 28, 2025, Northern Oil and Gas, Inc. issued a press release that includes certain preliminary financial and operating information for the fourth quarter and full year 2024. A copy of the press release is furnished as Exhibit 99.1 hereto.

Item 9.01.    Financial Statements and Exhibits.

Exhibit NumberDescription 99.1 Press release of Northern Oil and Gas, Inc., dated January 28, 2025. 104The cover page from this Current Report on Form 8-K, formatted in Inline XBRL

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: January 29, 2025NORTHERN OIL AND GAS, INC. By /s/ Erik J. Romslo Erik J. Romslo Chief Legal Officer and Secretary

nog-202411050001104485FALSE00011044852024-11-052024-11-05

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 5, 2024

NORTHERN OIL AND GAS, INC.

(Exact name of Registrant as specified in its charter) Delaware 001-33999 95-3848122

(State or other jurisdiction of incorporation) (Commission File Number) (IRS Employer Identification No.)

4350 Baker Road, Suite 400 Minnetonka, Minnesota 55343 (Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code   (952) 476-9800

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, par value $0.001NOGNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02.    Results of Operations and Financial Condition.

On November 5, 2024, Northern Oil and Gas, Inc. issued a press release announcing 2024 third quarter financial and operating results. A copy of the press release is furnished as Exhibit 99.1 hereto.

Item 9.01.    Financial Statements and Exhibits.

Exhibit NumberDescription 99.1 Press release of Northern Oil and Gas, Inc., dated November 5, 2024. 104The cover page from this Current Report on Form 8-K, formatted in Inline XBRL

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: November 5, 2024NORTHERN OIL AND GAS, INC. By /s/ Erik J. Romslo Erik J. Romslo Chief Legal Officer and Secretary

nog-202410240001104485FALSEOctober 24, 20244350 Baker Road, Suite 400MinnetonkaMinnesota00011044852024-10-242024-10-24

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 24, 2024

NORTHERN OIL AND GAS, INC.

(Exact name of Registrant as specified in its charter) Delaware 001-33999 95-3848122

(State or other jurisdiction of incorporation) (Commission File Number) (IRS Employer Identification No.)

4350 Baker Road, Suite 400 Minnetonka, Minnesota 55343 (Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code   (952) 476-9800

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, par value $0.001NOGNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02. Results of Operations and Financial Condition.

On October 24, 2024, Northern Oil and Gas, Inc. issued a press release that includes preliminary financial and operating results for the third quarter of 2024. A copy of the press release is furnished as Exhibit 99.1 hereto.

Item 9.01.    Financial Statements and Exhibits.

(d) Exhibits.

Exhibit NumberDescription 99.1 Press release of Northern Oil and Gas, Inc., dated October 24, 2024.

104The cover page from this Current Report on Form 8-K, formatted in inline XBRL.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: October 24, 2024NORTHERN OIL AND GAS, INC. By /s/ Erik J. Romslo Erik J. Romslo Chief Legal Officer and Secretary

nog-202407300001104485FALSE00011044852024-07-302024-07-30

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 30, 2024

NORTHERN OIL AND GAS, INC.

(Exact name of Registrant as specified in its charter) Delaware 001-33999 95-3848122

(State or other jurisdiction of incorporation) (Commission File Number) (IRS Employer Identification No.)

4350 Baker Road, Suite 400 Minnetonka, Minnesota 55343 (Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code   (952) 476-9800

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, par value $0.001NOGNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02.    Results of Operations and Financial Condition.

On July 30, 2024, Northern Oil and Gas, Inc. issued a press release announcing 2024 second quarter financial and operating results. A copy of the press release is furnished as Exhibit 99.1 hereto.

Item 9.01.    Financial Statements and Exhibits.

Exhibit NumberDescription 99.1 Press release of Northern Oil and Gas, Inc., dated July 30, 2024. 104The cover page from this Current Report on Form 8-K, formatted in Inline XBRL

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: July 30, 2024NORTHERN OIL AND GAS, INC. By /s/ Erik J. Romslo Erik J. Romslo Chief Legal Officer and Secretary

nog-202407290001104485FALSE00011044852024-07-292024-07-29

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 29, 2024

NORTHERN OIL AND GAS, INC.

(Exact name of Registrant as specified in its charter) Delaware 001-33999 95-3848122

(State or other jurisdiction of incorporation) (Commission File Number) (IRS Employer Identification No.)

4350 Baker Road, Suite 400 Minnetonka, Minnesota 55343 (Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code   (952) 476-9800

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, par value $0.001NOGNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02.    Results of Operations and Financial Condition.

On July 29, 2024, Northern Oil and Gas, Inc. issued a press release that includes certain financial and operating information for the second quarter of 2024. A copy of the press release is furnished as Exhibit 99.1 hereto.

Item 9.01.    Financial Statements and Exhibits.

Exhibit NumberDescription 99.1 Press release of Northern Oil and Gas, Inc., dated July 29, 2024. 104The cover page from this Current Report on Form 8-K, formatted in Inline XBRL

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: July 29, 2024NORTHERN OIL AND GAS, INC. By /s/ Erik J. Romslo Erik J. Romslo Chief Legal Officer and Secretary

nog-202404290001104485FALSE00011044852024-04-292024-04-29

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 29, 2024

NORTHERN OIL AND GAS, INC.

(Exact name of Registrant as specified in its charter) Delaware 001-33999 95-3848122

(State or other jurisdiction of incorporation) (Commission File Number) (IRS Employer Identification No.)

4350 Baker Road, Suite 400 Minnetonka, Minnesota 55343 (Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code   (952) 476-9800

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, par value $0.001NOGNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 1.01.    Entry into a Material Definitive Agreement.

On April 29, 2024, Northern Oil and Gas, Inc. (the “Company”) entered into an amendment (the “Credit Agreement Amendment”) to its Third Amended and Restated Credit Agreement, dated June 7, 2022, governing the Company’s revolving credit facility with Wells Fargo Bank, N.A., as administrative agent and collateral agent, and the lenders from time to time party thereto. Pursuant to the Credit Agreement Amendment, the Company’s semi-annual borrowing base redetermination was completed and: (i) the borrowing base will remain $1.8 billion and (ii) the elected commitment amount will increase from $1.25 billion to $1.5 billion.

The foregoing description of the Credit Agreement Amendment does not purport to be complete and is qualified in its entirety by reference to such document, which is filed herewith as Exhibit 10.1 and incorporated herein by reference.

Item 2.02.    Results of Operations and Financial Condition.

On April 30, 2024, Northern Oil and Gas, Inc. issued a press release announcing 2024 first quarter financial and operating results. A copy of the press release is furnished as Exhibit 99.1 hereto.

Item 2.03 Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant.

The information required by Item 2.03 relating to the Credit Agreement Amendment is contained in Item 1.01 of this Current Report on Form 8-K above and is incorporated herein by reference.

Item 9.01.    Financial Statements and Exhibits.

Exhibit NumberDescription 10.1 Third Amendment to the Third Amended and Restated Credit Agreement among Northern Oil and Gas, Inc., Wells Fargo Bank, National Association, as administrative agent, and the lenders party thereto, dated April 29, 2024. 99.1 Press release of Northern Oil and Gas, Inc., dated April 30, 2024. 104The cover page from this Current Report on Form 8-K, formatted in Inline XBRL

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: April 30, 2024NORTHERN OIL AND GAS, INC. By /s/ Erik J. Romslo Erik J. Romslo Chief Legal Officer and Secretary

nog-202404160001104485FALSEApril 16, 20244350 Baker Road, Suite 400MinnetonkaMinnesota00011044852024-04-162024-04-16

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 16, 2024

NORTHERN OIL AND GAS, INC.

(Exact name of Registrant as specified in its charter) Delaware 001-33999 95-3848122

(State or other jurisdiction of incorporation) (Commission File Number) (IRS Employer Identification No.)

4350 Baker Road, Suite 400 Minnetonka, Minnesota 55343 (Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code   (952) 476-9800

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, par value $0.001NOGNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02. Results of Operations and Financial Condition.

On April 16, 2024, Northern Oil and Gas, Inc. issued a press release that includes preliminary financial and operating results for the first quarter of 2024. A copy of the press release is furnished as Exhibit 99.1 hereto.

Item 9.01.    Financial Statements and Exhibits.

(d) Exhibits.

Exhibit NumberDescription 99.1 Press release of Northern Oil and Gas, Inc., dated April 16, 2024.

104The cover page from this Current Report on Form 8-K, formatted in inline XBRL.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: April 16, 2024NORTHERN OIL AND GAS, INC. By /s/ Erik J. Romslo Erik J. Romslo Chief Legal Officer and Secretary

nog-202402220001104485FALSEFebruary 22, 20244350 Baker Road, Suite 400MinnetonkaMinnesota00011044852024-02-222024-02-22

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 22, 2024

NORTHERN OIL AND GAS, INC.

(Exact name of Registrant as specified in its charter) Delaware 001-33999 95-3848122

(State or other jurisdiction of incorporation) (Commission File Number) (IRS Employer Identification No.)

4350 Baker Road, Suite 400 Minnetonka, Minnesota 55343 (Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code   (952) 476-9800

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, par value $0.001NOGNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02. Results of Operations and Financial Condition.

On February 22, 2024, Northern Oil and Gas, Inc. issued a press release announcing 2023 fourth quarter and full year financial and operating results. A copy of the press release is furnished as Exhibit 99.1 hereto.

Item 9.01.    Financial Statements and Exhibits.

(d) Exhibits.

Exhibit NumberDescription 99.1 Press release of Northern Oil and Gas, Inc., dated February 22, 2024

104The cover page from this Current Report on Form 8-K, formatted in inline XBRL

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: February 22, 2024NORTHERN OIL AND GAS, INC. By /s/ Erik J. Romslo Erik J. Romslo Chief Legal Officer and Secretary

nog-202402150001104485FALSEFebruary 15, 20244350 Baker Road, Suite 400MinnetonkaMinnesota00011044852024-02-152024-02-15

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 15, 2024

NORTHERN OIL AND GAS, INC.

(Exact name of Registrant as specified in its charter) Delaware 001-33999 95-3848122

(State or other jurisdiction of incorporation) (Commission File Number) (IRS Employer Identification No.)

4350 Baker Road, Suite 400 Minnetonka, Minnesota 55343 (Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code   (952) 476-9800

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, par value $0.001NOGNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02. Results of Operations and Financial Condition.

On February 15, 2024, Northern Oil and Gas, Inc. issued a press release that includes preliminary financial and operating information for the fourth quarter of 2023, among other matters. A copy of the press release is furnished as Exhibit 99.1 hereto.

Item 9.01.    Financial Statements and Exhibits.

(d) Exhibits.

Exhibit NumberDescription 99.1 Press release of Northern Oil and Gas, Inc., dated February 15, 2024.

104The cover page from this Current Report on Form 8-K, formatted in inline XBRL

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: February 16, 2024NORTHERN OIL AND GAS, INC. By /s/ Erik J. Romslo Erik J. Romslo Chief Legal Officer and Secretary

nog-202311010001104485FALSE00011044852023-11-012023-11-01

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 1, 2023

NORTHERN OIL AND GAS, INC.

(Exact name of Registrant as specified in its charter) Delaware 001-33999 95-3848122

(State or other jurisdiction of incorporation) (Commission File Number) (IRS Employer Identification No.)

4350 Baker Road, Suite 400 Minnetonka, Minnesota 55343 (Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code   (952) 476-9800

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, par value $0.001NOGNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02.    Results of Operations and Financial Condition.

On November 1, 2023, Northern Oil and Gas, Inc. issued a press release announcing 2023 third quarter financial and operating results. A copy of the press release is furnished as Exhibit 99.1 hereto.

Item 9.01.    Financial Statements and Exhibits.

Exhibit NumberDescription 99.1 Press release of Northern Oil and Gas, Inc., dated November 1, 2023. 104The cover page from this Current Report on Form 8-K, formatted in Inline XBRL

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: November 1, 2023NORTHERN OIL AND GAS, INC. By /s/ Erik J. Romslo Erik J. Romslo Chief Legal Officer and Secretary