Exhibit 99.3

UNAUDITED PRO FORMA CONSOLIDATED STATEMENTS OF OPERATIONS

On June 15, 2017, Lonestar Resources US Inc. (“Lonestar”, the “Company”, “we”, and “our”) acquired certain oil and gas assets in Fayette, Gonzales and Lavaca Counties, Texas (the “Marquis Acquisition”). The unadjusted purchase price for the Marquis Acquisition was approximately $50 million consisting of (i) approximately $44 million in cash and (ii) 1,500,000 million shares of the Company’s Series B Preferred Stock valued at approximately $6 million.  

Also on June 15, 2017, the Company acquired certain oil and gas properties in DeWitt, Gonzales and Karnes Counties, Texas (the “Battlecat Acquisition” and, together with the Marquis Acquisition, the “Acquisitions”).  The unadjusted purchase price for the Battlecat Acquisition was approximately $60 million consisting of (i) $55 million in cash and (ii) 1,184,632, shares of the Company’s Series B Preferred Stock valued at approximately $4.8 million.  

Upon closing of the Acquisitions, Lonestar acquired 115 gross / 80.3 net producing oil and gas wells, with Lonestar owning an average 70% working interest in the producing wells.  The leasehold acquired total 30,219 gross / 21,238 net acres, with Lonestar owning an average 70% working interest in the leasehold.  Lonestar initially identified during the acquisition process 85 gross / 73 net proved undeveloped drilling locations in the Lower Eagle Ford Shale.  The Company has identified an additional 34 gross / 24 net drilling locations in the Lower Eagle Ford Shale to which proved reserves have not been assigned.

The cash consideration for the Acquisitions was provided by (a) the sale of 5,400 shares of Lonestar’s Series A-1 Preferred Stock, par value $0.001 per share (the “Series A-1 Preferred Stock”) and 74,600 shares of Lonestar’s Series A-2 Preferred Stock, par value $0.001 per share (the “Series A-2 Preferred Stock” and, together with the Series A-1 Preferred Stock and the Series A-2 Preferred Stock, the “Series Preferred Stock”) to Chambers Energy Capital III, LP (“Chambers”), in each case at a price of $975 per share for an aggregate amount of approximately $77.7 million (less transaction costs), and (b) borrowings of approximately $23.7 million under Lonestar’s Senior Secured Credit Facility.  The non-cash consideration for the Acquisitions consisted of the issuance of the Company’s Series B Preferred Stock.

The accompanying pro forma consolidated financial statements present the Marquis and Battlecat Acquisitions along with (a) the related issuances of Series Preferred Stock and Series B Preferred Stock and (b) borrowings from the Senior Secured Credit Facility.  These unaudited statements have been developed by applying pro forma adjustments to our historical financial statements and the Marquis Acquisition Properties statement of revenue and direct operating expenses and the Battlecat Oil and Gas Holdings, LLC consolidated financial statements for the periods presented. The unaudited pro forma statement of income data for the periods presented gives effect to the Marquis and Battlecat Acquisitions and related transactions as if they had been completed on January 1, 2016.  A pro forma balance sheet is not included in this report as the assets and liabilities were included in the historical balances at September 30, 2017.

The unaudited pro forma consolidated financial statements should be read together with the historical financial statements of Lonestar and the related notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2016, the Company’s Quarterly Report on Form 10-Q for the quarter and nine months ended September 30, 2017, the historical statement of revenue and direct operating expenses for the Marquis Acquisition properties filed as Exhibit 99.1 in this Current Report on Form 8-K and the historical Battlecat Oil and Gas Holdings LLC consolidated financial statements filed as Exhibit 99.2 in this Current Report on Form 8-K.

The unaudited pro forma consolidated financial statements are included for informational purposes only and do not purport to reflect the results of operations or financial position that would have occurred had the Marquis and Battlecat Acquisitions and related financing occurred on the assumed acquisition date. Accordingly, they should not be relied upon as indicative of our results of operations or financial position had the Marquis and Battlecat Acquisitions and related financing occurred on the date assumed because they necessarily exclude various operating expenses. Additionally, the unaudited pro forma consolidated financial statements are not a projection of our results of operations or financial position for any future period or date.

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See Notes to Unaudited Pro Forma Consolidated Statements of Operations

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See Notes to Unaudited Pro Forma Consolidated Statements of Operations

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Note 1 – ADJUSTMENTS TO UNAUDITED PRO FORMA CONSOLIDATED STATEMENTS OF OPERATIONS

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Note 2 – SUPPLEMENTAL OIL AND GAS RESERVE INFORMATION (UNAUDITED)

Estimated Net Quantities of Oil and Gas Reserves

The pro forma estimates of proved oil and gas reserves and discounted future net cash flows for the properties as of  December 31, 2016 were prepared internally by Lonestar’s petroleum engineers. Users of this information should be aware that the process of estimating quantities of proved oil and gas reserves is very complex, requiring significant subjective decisions to be made in the evaluation of available geologic, engineering, and economic data for each reservoir. The data for any given reservoir may also change substantially over time as a result of numerous factors, including, but not limited to, additional development activity, evolving production history and continual reassessment of the viability of production under varying economic conditions. As a result, revisions to existing reserve estimates may occur from time to time. Although every reasonable effort is made to ensure reserve estimates reported represent the most accurate assessments possible, the subjective decisions and variance in available data for various reservoirs make estimates generally less precise than other estimates included in the statement of revenue and direct operating expenses disclosures.

The pro forma estimated proved net recoverable reserves presented below include only those quantities of oil and gas geologic and engineering data that demonstrate with reasonable certainty to be recoverable in future periods from known reservoirs under existing economic, operating and regulatory practices. Proved developed reserves represent only those reserves estimated to be recovered through existing wells. Proved undeveloped reserves include those reserves that may be recovered from new wells on undrilled acreage or from existing wells on which a relatively major expenditure for recompletion or secondary recovery operation is required. All of the pro forma properties' proved reserves set forth herein are located in the Continental United States. The estimate of reserves and the standardized measure of discounted future net cash flows shown below reflect Lonestar’s development plan for these properties.

The following tables set forth certain unaudited pro forma information concerning Lonestar’s proved oil, gas and NGL reserves for the year ended December 31, 2016, giving effect to the Marquis and Battlecat Acquisitions as if they had occurred on January 1, 2016. The following tables provide a summary of the changes in estimated reserves for the periods presented.

Standardized Measure of Discounted Future Net Cash Flows

The pro forma standardized measure related to proved oil, gas and NGL reserves, which give effect to the Marquis and Battlecat Acquisition Properties, is summarized below. This summary is based on a valuation of proved reserves using discounted cash flows based on SEC pricing applicable for each year, costs and economic conditions and a 10% discount rate. The additions to proved reserves from new discoveries and extensions and the impact of changes in prices and costs associated with proved reserves could vary significantly from year to year. Accordingly, the information presented below is not an estimate of fair value and should not be considered indicative of any trends.

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The pro forma standardized measure of discounted future cash flows does not purport, nor should it be interpreted to present, estimates of the fair value of the properties. An estimate of fair value would also take into account, among other things, the recovery of reserves not presently classified as proved, anticipated future changes in prices and costs and a discount factor more representative of the time value of money and risks inherent in reserve estimates. The following summary sets forth future net cash flows relating to proved oil and gas reserves based on the standardized measure prescribed by FASB ASC Topic 932.

Standardized Measure of Oil and Gas

In accordance with SEC and Financial Accounting Standards Board (“FASB”) requirements, our estimated net proved reserves and standardized measure at December 31, 2016 utilized prices (subsequently adjusted for quality and basis differentials) based on the twelve month unweighted average of the first of the month prices of West Texas Intermediate (“WTI”) oil price which equates to $42.75 per Bbl, approximately $12.40 per Bbl of NGL calculated as 29% of the WTI oil price per Bbl, and an average Henry Hub spot gas price which equates to $2.48 per MMBtu of gas.

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The following table sets forth the pro forma changes in standardized measure of discounted future net cash flows relating to proved oil and gas reserves for the periods indicated.

Changes in Standardized Measure

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