• 2021 financial performance in line with annual guidance
• Reported net loss of $6.6 million and $4.1 million for the three and six months ended June 30, 2021, respectively
• Reported adjusted EBITDA of $22.5 million and $53.4 million for the three and six months ended June 30, 2021, respectively
• Generated distributable cash flow of $7.3 and $20.1 million for the three and six months ended June 30, 2021, respectively
• Declares quarterly distribution of $0.005 or $0.02 per unit annually
• Announces Revolving Credit Facility Amendment

Martin Midstream Partners L.P. (Nasdaq:MMLP) (the "Partnership") today announced its financial results for the second quarter of 2021.

“For the second quarter of 2021, the Partnership had a solid performance in line with our annual projected cash flows of between $95 million to $102 million,” stated Bob Bondurant, President and Chief Executive Officer of Martin Midstream GP LLC, the general partner of the Partnership. “As the country returns to a more open economy and refinery utilization increases, we have seen heightened demand for our services particularly within the land transportation and lubricants businesses. However, the impact of COVID-19 is still reflected in a reduction in sulfur service volumes and lower marine day rates year over year. As expected, marine utilization has increased from last quarter and we anticipate the continued economic recovery will drive demand upward allowing for the further utilization of our asset base.”

“Looking to the third quarter, which is seasonally our weakest due to the cyclical nature of both the fertilizer and butane businesses, we amended our revolving credit facility in response to rising commodity prices and the continued impact of COVID-19 on the Partnership’s trailing twelve month cash flows. I’d like thank our lenders for recognizing our ongoing commitment to capital discipline through their support of the amendment.”

SECOND QUARTER 2021 OPERATING RESULTS BY BUSINESS SEGMENT

TERMINALLING AND STORAGE (“T&S”)

T&S Operating Income for the three months ended June 30, 2021 and 2020 was $3.7 million and $3.3 million, respectively.

Adjusted segment EBITDA for T&S was $10.6 million for each of the three month periods ended June 30, 2021 and 2020, reflecting increased volumes on packaged lubricants products, offset by expired capital recovery fees at the Smackover Refinery.

TRANSPORTATION

Transportation Operating Income for the three months ended June 30, 2021 and 2020 was $0.7 million and $0.6 million, respectively.

Adjusted segment EBITDA for Transportation was $5.0 million and $4.9 million for the three months ended June 30, 2021 and 2020, respectively, reflecting higher land transportation load count and rates, offset by lower marine day rates coupled with a reduction in marine equipment.

SULFUR SERVICES

Sulfur Services Operating Income for the three months ended June 30, 2021 and 2020 was $6.3 million and $7.4 million, respectively.

Adjusted segment EBITDA for Sulfur Services was $8.9 million and $10.8 million for the three months ended June 30, 2021 and 2020, respectively, reflecting lower refinery utilization volumes during the second quarter of 2021 as a result of continued effects of COVID-19.

NATURAL GAS LIQUIDS (“NGL”)

NGL Operating Income for the three months ended June 30, 2021 and 2020 was $0.7 million and $1.1 million, respectively.

Adjusted segment EBITDA for NGL was $1.7 million and $1.6 million for the three months ended June 30, 2021 and 2020, respectively, primarily reflecting increased margins in our butane optimization business, offset by a reduction in NGL margins due to rising commodity prices.

UNALLOCATED SELLING, GENERAL AND ADMINISTRATIVE EXPENSE (“USGA”)

USGA expenses included in operating income for the three months ended June 30, 2021 and 2020 were $3.8 million and $4.4 million, respectively.

USGA expenses included in adjusted EBITDA for the three months ended June 30, 2021 and 2020 were $3.7 million and $4.0 million, respectively, primarily reflecting a reduction in overhead allocated from Martin Resource Management.

LIQUIDITY

At June 30, 2021, the Partnership had $180 million drawn on its $300 million revolving credit facility, an increase of $4 million from March 31, 2021. The Partnership’s leverage ratio, as calculated under the revolving credit facility, was 5.3 times and 5.4 times on June 30, 2021 and March 31, 2021, respectively. The Partnership is in compliance with all debt covenants as of June 30, 2021 and March 31, 2021.

REVOLVING CREDIT FACILITY AMENDMENT

The Partnership announced today the amendment of its revolving credit facility effective July 16, 2021. The amendment revises certain financial covenant ratios and reduces the aggregate amount of commitments from $300 million to $275 million, among other things.

Royal Bank of Canada serves as administrative agent and collateral agent for the facility. Baker Botts L.L.P acted as legal counsel to the Partnership.

QUARTERLY CASH DISTRIBUTION

The Partnership has declared a quarterly cash distribution of $0.005 per unit for the quarter ended June 30, 2021. The distribution is payable on August 13, 2021 to common unitholders of record as of the close of business on August 6, 2021. The ex-dividend date for the cash distribution is August 5, 2021.

QUALIFIED NOTICE TO NOMINEES

This release serves as qualified notice to nominees as provided for under Treasury Regulation Section 1.1446-4(b)(4) and (d). Please note that 100 percent of the Partnership's distributions to foreign investors are attributable to income that is effectively connected with a United States trade or business. Accordingly, all of the Partnership's distributions to foreign investors are subject to federal income tax withholding at the highest effective tax rate for individuals or corporations, as applicable. Nominees, and not the Partnership, are treated as withholding agents responsible for withholding on the distributions received by them on behalf of foreign investors.

COVID-19 RESPONSE

The Partnership continues to evaluate protocols in response to the COVID-19 pandemic, including the impact of variants of COVID-19, such as the Delta variant. Where possible, employee work from home initiatives remain and travel restrictions have been lifted. Employees are encouraged to continue to exercise safety measures to protect the welfare of each other and the communities they serve.

RESULTS OF OPERATIONS

The Partnership had a net loss for the three months ended June 30, 2021 of $6.6 million, a loss of $0.17 per limited partner unit. The Partnership had a net loss for the three months ended June 30, 2020 of $2.2 million, a loss of $0.06 per limited partner unit. Adjusted EBITDA for the three months ended June 30, 2021 was $22.5 million compared to the three months ended June 30, 2020 of $23.9 million. Distributable cash flow for the three months ended June 30, 2021 was $7.3 million compared to the three months ended June 30, 2020 of $12.5 million.

The Partnership had a net loss for the six months ended June 30, 2021 of $4.1 million, a loss of $0.10 per limited partner unit. The Partnership had net income for the six months ended June 30, 2020 of $6.6 million, or $0.17 per limited partner unit. Adjusted EBITDA for the six months ended June 30, 2021 was $53.4 million compared to the six months ended June 30, 2020 of $54.9 million. Distributable cash flow for the six months ended June 30, 2021 was $20.1 million compared to the six months ended June 30, 2020 of $30.8 million.

Revenues for the three months ended June 30, 2021 were $184.3 million compared to the three months ended June 30, 2020 of $140.6 million. Revenues for the six months ended June 30, 2021 were $385.3 million compared to the six months ended June 30, 2020 of $339.5 million.

EBITDA, adjusted EBITDA, distributable cash flow and adjusted free cash flow are non-GAAP financial measures which are explained in greater detail below under the heading "Use of Non-GAAP Financial Information." The Partnership has also included below a table entitled "Reconciliation of EBITDA, Adjusted EBITDA, Distributable Cash Flow and Adjusted Free Cash Flow" in order to show the components of these non-GAAP financial measures and their reconciliation to the most comparable GAAP measurement.

An attachment included in the Current Report on Form 8-K to which this announcement is included, contains a comparison of the Partnership’s Adjusted EBITDA for the second quarter 2021 to the Partnership's Adjusted EBITDA for the second quarter 2020.

Investors' Conference Call

Date: Friday, July 23, 2021

Time: 8:00 a.m. CT (please dial in by 7:55 a.m.)

Dial In #: (833) 900-2251

Conference ID: 1691938

Replay Dial In # (800) 585-8367 – Conference ID: 1691938

A webcast of the conference call will also be available by visiting the Events and Presentations section under Investor Relations on our website at www.MMLP.com.

About Martin Midstream Partners

Martin Midstream Partners L.P., headquartered in Kilgore, Texas, is a publicly traded limited partnership with a diverse set of operations focused primarily in the United States Gulf Coast region. The Partnership's primary business lines include: (1) terminalling, processing, storage, and packaging services for petroleum products and by-products; (2) land and marine transportation services for petroleum products and by-products, chemicals, and specialty products; (3) sulfur and sulfur-based products processing, manufacturing, marketing and distribution; and (4) natural gas liquids marketing, distribution and transportation services. To learn more, visit www.MMLP.com.

Forward-Looking Statements

Statements about the Partnership’s outlook and all other statements in this release other than historical facts are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These forward-looking statements and all references to guidance or to financial or operational estimates or projections rely on a number of assumptions concerning future events and are subject to a number of uncertainties, including (i) the current and potential impacts of the COVID-19 pandemic generally, on an industry-specific basis, and on the Partnership’s specific operations and business, (ii) the effects of the continued volatility of commodity prices and the related macroeconomic and political environment, and (iii) other factors, many of which are outside its control, which could cause actual results to differ materially from such statements. While the Partnership believes that the assumptions concerning future events are reasonable, it cautions that there are inherent difficulties in anticipating or predicting certain important factors. A discussion of these factors, including risks and uncertainties, is set forth in the Partnership’s annual and quarterly reports filed from time to time with the Securities and Exchange Commission. The Partnership disclaims any intention or obligation to revise any forward-looking statements, including financial estimates, whether as a result of new information, future events, or otherwise except where required to do so by law.

Use of Non-GAAP Financial Information

The Partnership's management uses a variety of financial and operational measurements other than its financial statements prepared in accordance with United States Generally Accepted Accounting Principles ("GAAP") to analyze its performance. These include: (1) net income before interest expense, income tax expense, and depreciation and amortization ("EBITDA"), (2) adjusted EBITDA, (3) distributable cash flow and (4) adjusted free cash flow. The Partnership's management views these measures as important performance measures of core profitability for its operations and the ability to generate and distribute cash flow, and as key components of its internal financial reporting. The Partnership's management believes investors benefit from having access to the same financial measures that management uses.

EBITDA and Adjusted EBITDA. The Partnership defines Adjusted EBITDA as EBITDA before unit-based compensation expenses, gains and losses on the disposition of property, plant and equipment, impairment and other similar non-cash adjustments. Certain items excluded from EBITDA and adjusted EBITDA are significant components in understanding and assessing an entity's financial performance, such as cost of capital and historical costs of depreciable assets. The Partnership has included information concerning EBITDA and adjusted EBITDA because it provides investors and management with additional information to better understand the following: financial performance of the Partnership's assets without regard to financing methods, capital structure or historical cost basis; the Partnership's operating performance and return on capital as compared to those of other similarly situated entities; and the viability of acquisitions and capital expenditure projects. The Partnership's method of computing adjusted EBITDA may not be the same method used to compute similar measures reported by other entities. The economic substance behind the Partnership's use of adjusted EBITDA is to measure the ability of the Partnership's assets to generate cash sufficient to pay interest costs, support its indebtedness and make distributions to its unitholders.

Distributable Cash Flow. The Partnership defines Distributable Cash Flow as Adjusted EBITDA less cash paid for interest, cash paid for income taxes, maintenance capital expenditures, and plant turnaround costs. Distributable cash flow is a significant performance measure used by the Partnership's management and by external users of its financial statements, such as investors, commercial banks and research analysts, to compare basic cash flows generated by the Partnership to the cash distributions it expects to pay unitholders. Distributable cash flow is also an important financial measure for the Partnership's unitholders since it serves as an indicator of the Partnership's success in providing a cash return on investment. Specifically, this financial measure indicates to investors whether or not the Partnership is generating cash flow at a level that can sustain or support an increase in its quarterly distribution rates. Distributable cash flow is also a quantitative standard used throughout the investment community with respect to publicly-traded partnerships because the value of a unit of such an entity is generally determined by the unit's yield, which in turn is based on the amount of cash distributions the entity pays to a unitholder.

Adjusted Free Cash Flow. Adjusted free cash flow is defined as distributable cash flow less growth capital expenditures and principal payments under finance lease obligations. Adjusted free cash flow is a significant performance measure used by the Partnership's management and by external users of our financial statements and represents how much cash flow a business generates during a specified time period after accounting for all capital expenditures, including expenditures for growth and maintenance capital projects. The Partnership believes that adjusted free cash flow is important to investors, lenders, commercial banks and research analysts since it reflects the amount of cash available for reducing debt, investing in additional capital projects, paying distributions, and similar matters. The Partnership's calculation of adjusted free cash flow may or may not be comparable to similarly titled measures used by other entities.

EBITDA, adjusted EBITDA, distributable cash flow, and adjusted free cash flow should not be considered alternatives to, or more meaningful than, net income, cash flows from operating activities, or any other measure presented in accordance with GAAP. The Partnership's method of computing these measures may not be the same method used to compute similar measures reported by other entities.

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