DEFA14A

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

SCHEDULE 14A

(Rule 14a-101)

INFORMATION REQUIRED IN PROXY STATEMENT

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐

Check the appropriate box:


☐		Preliminary Proxy Statement

☐		Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

☐		Definitive Proxy Statement

☒		Definitive Additional Materials

☐		Soliciting Material Pursuant to §240.14a-12

LONESTAR RESOURCES US INC.

(Name of Registrant as Specified in its Charter)

(Name of Person(s) Filing Proxy Statement, if Other Than the Registrant)

Payment of Filing Fee (Check the appropriate box):



☒	No fee required.

☐	Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.

	(1)	Title of each class of securities to which transaction applies:
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	(5)	Total fee paid:

☐	Fee paid previously with preliminary materials:

☐	Check box if any part of the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify the filing for which the offsetting fee was paid previously. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing.

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	(2)	Form, Schedule or Registration Statement No.:
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	(4)	Date Filed:

*** Exercise Your Right to Vote ***

Important Notice Regarding the Availability of Proxy Materials for the

Shareholder Meeting to Be Held on November 03, 2017




		*LONESTAR RESOURCES US INC.*





		LONESTAR RESOURCES US INC. 600 BAILEY AVENUE, SUITE 200 FORT WORTH, TX 76107

Meeting Information

Meeting Type: Special Meeting

For holders as of: September 12, 2017

Date: November 03, 2017 Time: 2:00 PM CDT

Location:

Texas Capital Bank

Van Zandt Room

300 Throckmorton Street, Suite 200

Fort Worth, TX 76102

You are receiving this communication because you hold shares in the above named company.

This is not a ballot. You cannot use this notice to vote these shares. This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. You may view the proxy materials online at www.proxyvote.com or easily request a paper copy (see reverse side).

We encourage you to access and review all of the important information contained in the proxy materials before voting.

See the reverse side of this notice to obtain proxy materials and voting instructions.

— Before You Vote —

How to Access the Proxy Materials

Proxy Materials Available to VIEW or RECEIVE:

1. Notice & Proxy Statement 2. Form 10-K 3. Q1 10-Q 4. Q2 10-Q 5. 8-K 6. 8-K/A

How to View Online:

Have the information that is printed in the box marked by the arrow LOGO (located on the following page) and visit: www.proxyvote.com.

How to Request and Receive a PAPER or E-MAIL Copy:

If you want to receive a paper or e-mail copy of these documents, you must request one. There is NO charge for requesting a copy. Please choose one of the following methods to make your request:

1) BY INTERNET:

www.proxyvote.com

2) BY TELEPHONE:

1-800-579-1639

3) BY E-MAIL*:

sendmaterial@proxyvote.com

* If requesting materials by e-mail, please send a blank e-mail with the information that is printed in the box marked by the arrow LOGO (located on the following page) in the subject line.

Requests, instructions and other inquiries sent to this e-mail address will NOT be forwarded to your investment advisor. Please make the request as instructed above on or before October 22, 2017 to facilitate timely delivery.

— How To Vote —

Please Choose One of the Following Voting Methods

Vote In Person: Many shareholder meetings have attendance requirements including, but not limited to, the possession of an attendance ticket issued by the entity holding the meeting. Please check the meeting materials for any special requirements for meeting attendance. At the meeting, you will need to request a ballot to vote these shares.

Vote By Internet: To vote now by Internet, go to www.proxyvote.com. Have the information that is printed in the box marked by the arrow LOGO available and follow the instructions.

Vote By Mail: You can vote by mail by requesting a paper copy of the materials, which will include a proxy card.


				Voting items


				The Board of Directors recommends you vote FOR proposals 1 and 2.
				1.		To approve, for purposes of complying with NASDAQ Listing Rule 5635(d)(2), the issuance of shares of our Class A Voting Common Stock issuable upon conversion of all shares of our Series A-1 Convertible Participating Preferred Stock and Series A-2 Convertible Participating Preferred Stock (upon their conversion to shares of Series A-1 Convertible Participating Preferred Stock) issued or issuable pursuant to the Amended and Restated Securities Purchase Agreement, dated as of June 15, 2017, by and between the Company and Chambers Energy Capital III, LP.
				2.		To approve an adjournment of the Special Meeting, if necessary, to solicit additional proxies if there are not sufficient votes to approve Proposal 1 at the time of the Special Meeting.