# EDGAR Filing Document

**Accession Number:** 0001104485
**File Stem:** 0001193125-26-252586
**Filing Date:** 2026-6
**Character Count:** 11199
**Document Hash:** 1212a95b263914295c6601ff4c5b7952
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-252586.hdr.sgml**: 20260602

**ACCESSION NUMBER**: 0001193125-26-252586

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 13

**CONFORMED PERIOD OF REPORT**: 20260602

**ITEM INFORMATION**: Other Events

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20260602

**DATE AS OF CHANGE**: 20260602

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** NORTHERN OIL & GAS, INC.
- **CENTRAL INDEX KEY:** 0001104485
- **STANDARD INDUSTRIAL CLASSIFICATION:** CRUDE PETROLEUM & NATURAL GAS [1311]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 953848122
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-33999
- **FILM NUMBER:** 261053701

**BUSINESS ADDRESS:**
- **STREET 1:** 4350 BAKER ROAD
- **STREET 2:** SUITE 400
- **CITY:** MINNETONKA
- **STATE:** MN
- **ZIP:** 55343
- **BUSINESS PHONE:** 952-476-9800

**MAIL ADDRESS:**
- **STREET 1:** 4350 BAKER ROAD
- **STREET 2:** SUITE 400
- **CITY:** MINNETONKA
- **STATE:** MN
- **ZIP:** 55343

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** KENTEX PETROLEUM INC
- **DATE OF NAME CHANGE:** 20000128

?xml version='1.0' encoding='ASCII'? 8-K

### 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): June 2, 2026

## NORTHERN OIL AND GAS, INC.

#### (Exact name of Registrant as specified in its charter)

---

| | | |
|:---|:---|:---|
| **Delaware** | **001-33999** | **95-3848122** |
| **(State or other jurisdiction**<br> **of incorporation)** | **(Commission**<br> **File Number)** | **(IRS Employer**<br> **Identification No.)** |

---

---

| | |
|:---|:---|
| **4350 Baker Road, Suite 400**<br> **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 (17 CFR 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 class** | **Trading<br>Symbol(s)** | **Name of each exchange<br>on which registered** |
| Common Stock, par value $0.001 | NOG | New 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 8.01** | **Other Events.**  |

---

On June 2, 2026, Northern Oil and Gas, Inc., a Delaware corporation (the "Company"), filed a prospectus supplement (the "Resale Prospectus Supplement") to the prospectus contained in its effective Registration Statement on Form S-3ASR (File No. 333-296399) covering the resale of up to 3,689,413 shares of the Company's common stock, par value $0.001 per share ("Common Stock"), which may be used by the selling stockholder identified therein to resell shares of Common Stock received by the selling stockholder in connection with the transactions (the "Parallax Acquisition") contemplated by that certain asset purchase and sale agreement, dated May 22, 2026 (the "PSA"), among Parallax Energy Operating Inc., a corporation existing under the laws of the Province of Alberta ("Seller"), NOG Energy Canada, Ltd., a corporation existing under the laws of the Province of Alberta and a wholly owned subsidiary of the Company, and, for certain limited purposes, the Company. Pursuant to the terms of the PSA, at the closing of the Parallax Acquisition, the Company and Seller entered into a registration rights agreement, pursuant to which, among other things and subject to certain restrictions, the Company agreed to file with the Securities and Exchange Commission a prospectus supplement registering for resale the shares of Common Stock issued to Seller (or its permitted transferees) upon consummation of the Parallax Acquisition.

The Company is filing this Current Report on Form 8-K to provide the legal opinion as to the validity of the shares of Common Stock covered by the Resale Prospectus Supplement, which opinion is attached hereto as Exhibit 5.1 and is incorporated herein by reference.

---

| | |
|:---|:---|
| **Item 9.01** | **Financial Statements and Exhibits.**  |

---

(d) *Exhibits.*

---

| | |
|:---|:---|
| **Exhibit**<br>**Number** | **Description** |
| 5.1 | [Opinion Letter of Kirkland & Ellis LLP regarding the validity of the shares of Common Stock covered by the Resale Prospectus Supplement.](d37373dex51.htm) |
| 23.1 | [Consent of Kirkland & Ellis LLP (included as part of Exhibit 5.1).](d37373dex51.htm) |
| 104 | Cover Page Interactive Data File (embedded within the Inline XBRL document). |

---

------

#### 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.

---

| | |
|:---|:---|
| **NORTHERN OIL AND GAS, INC.** | **NORTHERN OIL AND GAS, INC.** |
| By: | /s/ Erik J. Romslo |
|  | Erik J. Romslo |
|  | *Chief Legal Officer and Secretary* |

---

Dated: June 2, 2026

## Exhibit 5.1

**Exhibit 5.1**![LOGO](g37373g0529234156978.jpg)

609 Main Street Houston, TX 77002 United States +1 713 836 3600 www.kirkland.com Facsimile:<br>+1 713 836 3601

June 2, 2026

Northern Oil and Gas, Inc.

4350 Baker Road, Suite 400

Minnetonka, Minnesota 55343

Ladies and Gentlemen:

We are issuing this opinion in our capacity as special counsel to Northern Oil and Gas, Inc., a Delaware corporation (the "***Company***"), in connection with the preparation of the prospectus supplement, dated June 2, 2026, filed with the Securities and Exchange Commission (the "***Commission***") pursuant to Rule 424(b) under the Securities Act of 1933, as amended (the "***Securities Act***"), on June 2, 2026, to the prospectus, dated June 1, 2026 (as supplemented by the prospectus supplement, the "***Prospectus***"), that constitutes a part of the Company's Registration Statement on Form S-3ASR (as amended or supplemented, the "***Registration Statement***") filed with the Commission on June 1, 2026 under the Securities Act by the Company. The Prospectus relates to the sale from time to time, pursuant to Rule 415 of the General Rules and Regulations promulgated under the Securities Act, of up to 3,689,413 shares (the "***Shares***") of common stock, par value $0.001 per share, of the Company to be sold by a stockholder of the Company (the "***Selling Stockholder***").

In connection with the registration of the Shares, we have examined originals, or copies certified or otherwise identified to our satisfaction, of such documents, corporate records and other instruments as we have deemed necessary for the purposes of this opinion, including (i) the Registration Statement and the exhibits thereto, (ii) the Prospectus, (iii) the organizational documents of the Company and (iv) the minutes and records of the corporate proceedings of the Company with respect to the issuance of the Shares.

For purposes of this opinion, we have assumed the authenticity of all documents submitted to us as originals, the conformity to the originals of all documents submitted to us as copies and the authenticity of the originals of all documents submitted to us as copies. We have also assumed the legal capacity of all natural persons, the genuineness of the signatures of persons signing all documents in connection with which this opinion is rendered, the authority of such persons signing on behalf of the parties thereto and the due authorization, execution and delivery of all documents by the parties thereto other than the Company. We have not independently established or verified any facts relevant to the opinions expressed herein, but have relied upon statements and representations of officers and other representatives of the Company and others as to factual matters.

Based upon and subject to the foregoing qualifications, assumptions and limitations and the further limitations set forth below, we are of the opinion that, with respect to the Shares to be offered by the Selling Stockholder pursuant to the Registration Statement and the Prospectus, such Shares are validly issued, fully paid and nonassessable.

Our opinion expressed above is subject to the qualifications that we express no opinion as to the applicability of, compliance with, or effect of any laws except the General Corporation Law of the State of Delaware, including the applicable provisions of the Delaware constitution and reported judicial decisions interpreting these laws.

------

Northern Oil and Gas, Inc.

June 2, 2026

We hereby consent to the filing of this opinion with the Commission as Exhibit 5.1 to the Current Report on Form 8-K filed by the Company on the date hereof and its incorporation by reference into the Registration Statement. We also consent to the reference to our firm under the heading "Legal Matters" in the Prospectus. In giving this consent, we do not thereby admit that we are in the category of persons whose consent is required under Section 7 of the Securities Act or the rules and regulations of the Commission.

We do not find it necessary for the purposes of this opinion, and accordingly we do not purport to cover herein, the application of the securities or "Blue Sky" laws of the various states to the sale of the Shares.

This opinion is limited to the specific issues addressed herein, and no opinion may be inferred or implied beyond that expressly stated herein. This opinion speaks only as of the date hereof and we assume no obligation to revise or supplement this opinion should the General Corporation Law of the State of Delaware be changed by legislative action, judicial decision or otherwise after the date hereof.

This opinion is furnished to you in connection with the filing of the Prospectus in accordance with the requirements of Item 601(b)(5) of Regulation S-K under the Securities Act, and is not to be used, circulated, quoted or otherwise relied upon for any other purpose.

Sincerely,

/s/ KIRKLAND & ELLIS LLP