Third Quarter 2023 Summary Results and Highlights

• Revenue of $69.7 million

• Net income of $7.6 million, or $0.16 per diluted Class A share; Adjusted pro forma net income of $8.5 million, or $0.19 per fully diluted share, for the quarter ended September 30, 2023

• Adjusted EBITDA of $23.4 million

• Increased deployments of Solaris’ new top fill technology across multiple basins

• Generated $6 million in free cash flow after asset sales and reduced borrowings outstanding on the credit facility by $6 million

• Announced a quarterly dividend of $0.12 per share to be paid on December 11, 2023, which represents a 9% per-share increase over the third quarter 2023 and Solaris’ third raise since initiating the dividend in 2018. Once paid, the fourth quarter 2023 dividend will be Solaris’ 21st consecutive quarterly dividend

• Approximately $158 million cumulatively returned to shareholders through dividends and share buybacks since 2018, pro forma for the announced dividend to be paid in December

Solaris Oilfield Infrastructure, Inc. (NYSE:SOI) (“Solaris” or the “Company”), today announced third quarter 2023 financial and operational results.

“The Solaris team executed strongly and safely as industry activity bottomed during the third quarter. Despite this, we continued to see adoption of our new technology offerings. As a result, nearly 55% of industry frac crews we followed in the quarter deployed either a top fill or AutoBlend™ system, up from over 40% in the prior quarter,” Solaris’ Chairman and Chief Executive Officer Bill Zartler commented.

“We generated another quarter of positive free cash flow and used excess cash to reduce our revolver borrowings. We expect free cash flow to grow in the fourth quarter and into 2024 as we generate returns from the growth capital we have invested in the business over the last couple of years. We will use this additional cash flow to continue to return capital to shareholders and strengthen the balance sheet.”

“We are pleased to announce today that the Board has approved a $0.12 per share dividend, the second increase to our ordinary dividend in 2023. Our current per share dividend is a 9% increase over the third quarter dividend and a 14% increase over the fourth quarter 2022 dividend. Since we began returning cash to shareholders in 2018, we will have cumulatively returned approximately $158 million through dividends and share repurchases.”

Third Quarter 2023 Financial Review

Solaris reported net income of $7.6 million, or $0.16 per diluted Class A share, for third quarter 2023, compared to second quarter 2023 net income of $12.2 million, or $0.24 per diluted Class A share, and third quarter 2022 net income of $11.5 million, or $0.22 per diluted Class A share. Adjusted pro forma net income for third quarter 2023 was $8.5 million, or $0.19 per fully diluted share, compared to second quarter 2023 adjusted pro forma net income of $11.3 million, or $0.25 per fully diluted share, and third quarter 2022 adjusted pro forma net income of $11.1 million, or $0.24 per fully diluted share.

Revenues were $69.7 million for third quarter 2023, which were down 10% sequentially and down 25% year over year. Adjusted EBITDA for third quarter 2023 was $23.4 million, which was down 13% from second quarter 2023 and down 2% from third quarter 2022. The sequential decrease in revenue was primarily driven by decreases in ancillary trucking services activity. Total system revenue was approximately flat sequentially, as the decline in industry frac activity was offset by revenue growth from the addition of top fill systems. The sequential decrease in Adjusted EBITDA was impacted by the decline in ancillary services as well as higher maintenance costs that were incurred to improve system reliability as operators continue to drive frac efficiency through increased service intensity. These system improvements are also expected to enhance Solaris’ ability to respond more quickly to anticipated future activity improvements.

During the third quarter of 2023, Solaris earned revenue on 108 fully utilized systems, which includes sand systems, top fill systems and AutoBlend™ systems. Total fully utilized systems were flat sequentially and up 2% year over year. The Company followed an average of 67 industry frac crews on a fully utilized basis in the third quarter of 2023, which was down 8% from 73 frac crews followed in the second quarter of 2023.

Capital Expenditures, Free Cash Flow and Liquidity

Capital expenditures after the sale of assets in the third quarter 2023 were approximately $15 million, which is primarily related to manufacturing of top fill systems. The Company expects capital expenditures in the fourth quarter of 2023 to be approximately $10 million, including maintenance capital expenditures. Based on this estimate, full year 2023 capital expenditures are expected to be at the low end of the previously guided range of $65 million to $75 million.

Free cash flow (defined as net cash provided by operating activities less investment in property, plant and equipment) after asset sales was positive $6 million in the third quarter of 2023, including a working capital use of $1 million and capital expenditures of $17 million, which was offset by the sale of $2 million of assets no longer used. Distributable cash flow (defined as Adjusted EBITDA less maintenance capital expenditures) was approximately $20 million for the third quarter 2023 and covered quarterly dividend distributions of $5 million by approximately four times.

As of September 30, 2023, the Company had approximately $3 million of cash on the balance sheet. The Company reduced net borrowings on the credit facility by $6 million and ended the third quarter of 2023 with $37 million in borrowings outstanding and $41 million of liquidity.

Shareholder Returns

On August 15, 2023, the Company’s Board of Directors approved a cash dividend of $0.11 per share of Class A common stock, which was paid on September 15, 2023 to holders of record as of September 5, 2023. A distribution of $0.11 per unit was also approved for holders of units in Solaris Oilfield Infrastructure, LLC (“Solaris LLC”).

On October 25, 2023, the Company’s Board of Directors approved a cash dividend of $0.12 per share of Class A common stock, to be paid on December 11, 2023 to holders of record as of December 1, 2023. A distribution of $0.12 per unit has also been approved for holders of units in Solaris LLC, which is subject to the same payment and record dates.

The Company did not repurchase shares during the third quarter of 2023 and approximately $24 million remains in the Company’s stock repurchase authorization. Since initiating the repurchase authorization in the first quarter of 2023, Solaris has repurchased a total of 3.1 million Class A common shares, or 6.5% of the Company’s total outstanding shares.

Pro forma for the announced dividend to be paid in December 2023, the Company has paid 21 consecutive quarterly dividends and repurchased approximately 12% of total outstanding shares.

Conference Call

The Company will host a conference call to discuss its third quarter 2023 results on Friday, October 27, 2023 at 8:00 a.m. Central Time (9:00 a.m. Eastern Time). To join the conference call from within the United States, participants may dial (844) 413-3978. To join the conference call from outside of the United States, participants may dial (412) 317-6594. When instructed, please ask the operator to be joined to the Solaris Oilfield Infrastructure, Inc. call. Participants are encouraged to log in to the webcast or dial in to the conference call approximately ten minutes prior to the start time. To listen via live webcast, please visit the Investor Relations section of the Company’s website at http://www.solarisoilfield.com.

An audio replay of the conference call will be available shortly after the conclusion of the call and will remain available for approximately seven days. It can be accessed by dialing (877) 344-7529 within the United States or (412) 317-0088 outside of the United States. The conference call replay access code is 2373251. The replay will also be available in the Investor Relations section of the Company’s website shortly after the conclusion of the call and will remain available for approximately seven days.

About Non-GAAP Measures

In addition to financial results determined in accordance with generally accepted accounting principles in the United States (“GAAP”), this news release presents non-GAAP financial measures. Management believes that adjusted net income, adjusted diluted earnings per share and Adjusted EBITDA, provide useful information to investors regarding the Company’s financial condition and results of operations because they reflect the core operating results of our businesses and help facilitate comparisons of operating performance across periods. Although management believes the aforementioned non-GAAP financial measures are good tools for internal use and the investment community in evaluating Solaris’ overall financial performance, the foregoing non-GAAP financial measures should be considered in addition to, not as a substitute for or superior to, other measures of financial performance prepared in accordance with GAAP. A reconciliation of these non-GAAP measures to the most directly comparable GAAP measures is included in the accompanying financial tables.

About Solaris Oilfield Infrastructure, Inc.

Solaris Oilfield Infrastructure, Inc. (NYSE:SOI) provides mobile equipment that drives supply chain and execution efficiencies in the completion of oil and natural gas wells. Solaris’ patented equipment and systems are deployed across oil and natural gas basins in the United States. Additional information is available on our website, www.solarisoilfield.com.

Website Disclosure

We use our website (www.solarisoilfield.com) as a routine channel of distribution of company information, including news releases, analyst presentations, and supplemental financial information, as a means of disclosing material non-public information and for complying with our disclosure obligations under the U.S. Securities and Exchange Commission’s (the “SEC”) Regulation FD. Accordingly, investors should monitor our website in addition to following press releases, SEC filings and public conference calls and webcasts. Additionally, we provide notifications of news or announcements on our investor relations website. Investors and others can receive notifications of new information posted on our investor relations website in real time by signing up for email alerts.

None of the information provided on our website, in our press releases, public conference calls and webcasts, or through social media channels is incorporated by reference into, or deemed to be a part of, this press release or will be incorporated by reference into any report or document we file with the SEC unless we expressly incorporate any such information by reference, and any references to our website are intended to be inactive textual references only.

Forward Looking Statements

This press release contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Examples of forward-looking statements include, but are not limited to, our business strategy, our industry, our future profitability, the various risks and uncertainties associated with the extraordinary market environment and impacts resulting from the volatility in global oil markets and the COVID-19 pandemic, expected capital expenditures and the impact of such expenditures on performance, management changes, current and potential future long-term contracts and our future business and financial performance. Forward-looking statements are based on our current expectations and assumptions regarding our business, the economy and other future conditions. Because forward-looking statements relate to the future, by their nature, they are subject to inherent uncertainties, risks and changes in circumstances that are difficult to predict. As a result, our actual results may differ materially from those contemplated by the forward-looking statements. Factors that could cause our actual results to differ materially from the results contemplated by such forward-looking statements include, but are not limited to the factors discussed or referenced in our filings made from time to time with the SEC. Readers are cautioned not to place undue reliance on forward-looking statements, which speak only as of the date hereof. Factors or events that could cause our actual results to differ may emerge from time to time, and it is not possible for us to predict all of them. We undertake no obligation to publicly update or revise any forward-looking statement, whether as a result of new information, future developments or otherwise, except as may be required by law.

SOLARIS OILFIELD INFRASTRUCTURE, INC AND SUBSIDIARIES

RECONCILIATION AND CALCULATION OF NON-GAAP FINANCIAL AND OPERATIONAL MEASURES

(In thousands)

(Unaudited)

EBITDA AND ADJUSTED EBITDA

We view EBITDA and Adjusted EBITDA as important indicators of performance. We define EBITDA as net income, plus (i) depreciation and amortization expense, (ii) interest expense and (iii) income tax expense, including franchise taxes. We define Adjusted EBITDA as EBITDA plus (i) stock-based compensation expense and (ii) certain non-cash items and extraordinary, unusual or non-recurring gains, losses or expenses.

We believe that our presentation of EBITDA and Adjusted EBITDA provides useful information to investors in assessing our financial condition and results of operations. Net income is the GAAP measure most directly comparable to EBITDA and Adjusted EBITDA. EBITDA and Adjusted EBITDA should not be considered alternatives to net income presented in accordance with GAAP. Because EBITDA and Adjusted EBITDA may be defined differently by other companies in our industry, our definitions of EBITDA and Adjusted EBITDA may not be comparable to similarly titled measures of other companies, thereby diminishing their utility. The following table presents a reconciliation of net income to EBITDA and Adjusted EBITDA for each of the periods indicated.

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ADJUSTED PRO FORMA NET INCOME AND ADJUSTED PRO FORMA EARNINGS PER FULLY DILUTED SHARE

Adjusted pro forma net income represents net income attributable to Solaris assuming the full exchange of all outstanding membership interests in Solaris LLC not held by Solaris Oilfield Infrastructure, Inc. for shares of Class A common stock, adjusted for certain non-recurring items that the Company doesn't believe directly reflect its core operations and may not be indicative of ongoing business operations. Adjusted pro forma earnings per fully diluted share is calculated by dividing adjusted pro forma net income by the weighted-average shares of Class A common stock outstanding, assuming the full exchange of all outstanding units of Solaris LLC (“Solaris LLC Units”), after giving effect to the dilutive effect of outstanding equity-based awards.

When used in conjunction with GAAP financial measures, adjusted pro forma net income and adjusted pro forma earnings per fully diluted share are supplemental measures of operating performance that the Company believes are useful measures to evaluate performance period over period and relative to its competitors. By assuming the full exchange of all outstanding Solaris LLC Units, the Company believes these measures facilitate comparisons with other companies that have different organizational and tax structures, as well as comparisons period over period because it eliminates the effect of any changes in net income attributable to Solaris as a result of increases in its ownership of Solaris LLC, which are unrelated to the Company's operating performance, and excludes items that are non-recurring or may not be indicative of ongoing operating performance.

Adjusted pro forma net income and adjusted pro forma earnings per fully diluted share are not necessarily comparable to similarly titled measures used by other companies due to different methods of calculation. Presentation of adjusted pro forma net income and adjusted pro forma earnings per fully diluted share should not be considered alternatives to net income and earnings per share, as determined under GAAP. While these measures are useful in evaluating the Company's performance, it does not account for the earnings attributable to the non-controlling interest holders and therefore does not provide a complete understanding of the net income attributable to Solaris. Adjusted pro forma net income and adjusted pro forma earnings per fully diluted share should be evaluated in conjunction with GAAP financial results. A reconciliation of adjusted pro forma net income to net income attributable to Solaris, the most directly comparable GAAP measure, and the computation of adjusted pro forma earnings per fully diluted share are set forth below.

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