UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 12b-25

NOTIFICATION OF LATE FILING

(Check One):	☐  Form 10-K     ☐  Form 20-F     ☐  Form 11-K     ☒  Form 10-Q ☐  Form 10-D     ☐  Form N-CEN     ☐  Form N-CSR
	For Period Ended:     March 31, 2020
	☐  Transition Report on Form 10-K
	☐  Transition Report on Form 20-F
	☐  Transition Report on Form 11-K
	☐  Transition Report on Form 10-Q
	For the Transition Period Ended:

Read Instruction (on back page) Before Preparing Form. Please Print or Type.

Nothing in this form shall be construed to imply that the Commission has verified any information contained herein.

If the notification relates to a portion of the filing checked above, identify the item(s) to which the notification relates:

PART I-REGISTRANT INFORMATION

Lonestar Resources US Inc.

Full name of Registrant

N/A

Former name if Applicable

111 Boland Street #301

Address of Principal Executive Office (Street and number)

Fort Worth, Texas 76107

City, State and Zip Code

PART II-RULE 12b-25 (b) AND (c)

If the subject report could not be filed without unreasonable effort or expense and the registrant seeks relief pursuant to Rule 12b-25(b), the following should be completed. (Check box if appropriate.)

☒	(a)	The reasons described in reasonable detail in Part III of this form could not be eliminated without unreasonable effort or expense;
	(b)	The subject annual report, semi-annual report, transition report on Form 10-K, Form 20-F, Form 11-K, FORM N-CEN or Form N-CSR, or portion thereof will be filed on or before the fifteenth calendar day following the prescribed due date; or the subject quarterly report or transition report on Form 10-Q, or subject distribution report on Form 10-D, or portion thereof, will be filed on or before the fifth calendar day following the prescribed due date; and
	(c)	The accountant’s statement or other exhibit required by Rule 12b-25(c) has been attached if applicable.

PART III—NARRATIVE

State below in reasonable detail why Form 10-K, 20-F, 11-K, 10-Q, 10-D, N-CEN, N-CSR, or the transition report or portion thereof, could not be filed within the prescribed time period.

Lonestar Resources US Inc. (the “Company”) is not filing by the prescribed due date its Form 10-Q for the three months ended March 31, 2020 (the “Form 10-Q”). The Company is unable, without unreasonable effort or expense, to file its Form 10-Q by the prescribed filing date due to a delay experienced by the Company in completing its financial statements and other disclosures in the Form 10-Q. This delay principally relates to the Company’s evaluation of the impact of global economic uncertainty due to the COVID-19 pandemic and of the decline in commodity prices. The Company anticipates that it will file the Form 10-Q no later than the fifth calendar day following the prescribed filing date.

Forward-Looking Statements

This notification contains “forward-looking statements.” These statements are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Such statements reflect management’s current expectations based on currently available operating, financial and competitive information, but are subject to risks, uncertainties and assumptions that could cause actual results to differ materially from those anticipated in or implied by the forward-looking statements. Our forward-looking statements are generally identified with words such as “anticipate,” “believe,” budgeted,” “continue,” “could,” “estimate,” “expect,” “forecast,” “goal,” “intend,” “may,” “objective,” “plan,” “potential,” “predict,” “projection,” “scheduled,” “should,” or other similar words. Risks, uncertainties and assumptions that could affect our forward-looking statements include, among other things the risk related to the impact of the COVID-19 pandemic in geographic regions or markets served by us, or where our operations are located, including the risk of global recession and the other risk factors that have been listed from time to time in the Company’s SEC reports, including but not limited to the Company’s Annual Report on Form 10-K for the year ended December 31, 2019, and will be listed from time to time in the Company’s SEC reports.

All forward-looking statements included in this notification should be considered in the context of these risks. Except as required by law, we undertake no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise. Investors and prospective investors are cautioned not to place undue reliance on such forward-looking statements.

PART IV—OTHER INFORMATION

(1) Name and telephone number of person to contact in regard to this notification.

Jason N. Werth	817	921-1889
(Name)	(Area Code)	(Telephone Number)

(2) Have all other periodic reports required under Section 13 or 15(d) of the Securities Exchange Act of 1934 or Section 30 of the Investment Company Act of 1940 during the preceding 12 months or for such shorter period that the registrant was required to file such report(s) been filed? If the answer is no, identify report(s).    ☒  Yes     ☐  No

(3) Is it anticipated that any significant change in results of operations from the corresponding period for the last fiscal year will be reflected by the earnings statements to be included in the subject report or portion thereof?    ☒  Yes    ☐  No

If so, attach an explanation of the anticipated change, both narratively and quantitatively, and, if appropriate, state the reasons why a reasonable estimate of the results cannot be made.

The Company expects that its Form 10-Q will reflect a $199.9 million impairment of its oil and natural gas properties.

Lonestar Resources US Inc.

(Name of Registrant as Specified in Charter)

has caused this notification to be signed on its behalf by the undersigned thereunto duly authorized.

Date: June 29, 2020	By:	/s/ Frank D. Bracken, III
		Frank D. Bracken, III
		Chief Executive Officer