Exhibit 99.1

Investor Contact 
David Martin
Media Contact
Jay Cooney



Revenue Increased 10 Percent in Q1 Compared with the Prior-Year Quarter

Q1 GAAP Operating Income Totaled $38 Million

Operating Income Excluding Unusual Items Increased 14 Percent Compared with the Prior-Year Quarter to $42 Million

GAAP Diluted Earnings per Share in Q1 of $0.26, While Adjusted Diluted Earnings per Share Excluding Unusual Items Increased 32 Percent to $0.29

2019 Adjusted Operating Income Guidance Increased to Between $207 Million to $222 Million; Compared with Prior Range of $200 Million to $220 Million

Announces Strategic Transactions to Accelerate Portfolio Transformation to a Leading Provider of Environmental Solutions and Drive Growth with Acquisition of Clean Earth and Divestiture of Air-X-Changers

Quarterly Conference Call Time Changed to 8:30 AM ET

CAMP HILL, PA (May 9, 2019) - Harsco Corporation (NYSE: HSC) today reported first quarter 2019 results. On a U.S. GAAP ("GAAP") basis, first quarter of 2019 diluted earnings per share from continuing operations were $0.26, which included costs to implement Rail's productivity improvement initiative and professional fees incurred to support and execute the Company's growth strategy, partially offset by a non-cash foreign currency translation gain related to a previous site exit. Excluding these items, diluted earnings per share from continuing operations in the first quarter of 2019 were $0.29. These figures compare with first quarter of 2018 GAAP and adjusted diluted earnings per share from continuing operations of $0.22.

GAAP operating income from continuing operations for the first quarter of 2019 was $38 million. Excluding unusual items, operating income was $42 million, compared to the Company's previously provided guidance range of $36 million to $43 million.

“Harsco delivered a strong start to 2019, highlighting the solid operational foundation we have in place and supported by healthy demand across the end markets we serve. Revenues for the quarter increased 10 percent year-over-year driven by our Industrial and Rail performance. In our M&M segment, we continue to capitalize on the demand for differentiated and value-added environmental solutions, which is an area of investment and focus for Harsco to drive long-term growth. As a result of the positive momentum we are


The following information was filed by Harsco Corp (HSC) on Thursday, May 9, 2019 as an 8K 2.02 statement, which is an earnings press release pertaining to results of operations and financial condition. It may be helpful to assess the quality of management by comparing the information in the press release to the information in the accompanying 10-Q Quarterly Report statement of earnings and operation as management may choose to highlight particular information in the press release.

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