on an adjusted diluted basis of 263.3 million shares, versus $181.3 million, or $0.69 per diluted share, in the prior year period. Adjusted EBITDA* in the second quarter was $394.3 million, as compared to adjusted EBITDA* of $425.3 million in the prior year period.
Adjusted net income attributable to Waste Connections, adjusted net income attributable to Waste Connections per diluted share and adjusted EBITDA, all non-GAAP measures, primarily exclude impairments and other operating items and acquisition-related items. For detailed reconciliations, please refer to the attached schedules.
Six Months Year to Date Results
For the six months ended June 30, 2020, revenue was $2.658 billion, as compared to revenue of $2.614 billion in the year ago period. Operating loss, which included $445.2 million primarily related to impairments and other operating items, was $15.4 million, compared to operating income of $407.0 million for the same period in 2019, which included $31.3 million primarily related to impairments and other operating items.
Net loss attributable to Waste Connections for the six months ended June 30, 2020, was $84.0 million, or $0.32 per share on a diluted basis of 263.4 million shares. In the year ago period, the Company reported net income attributable to Waste Connections of $274.5 million, or $1.04 per share on a diluted basis of 264.4 million shares.
Adjusted net income attributable to Waste Connections* for the six months ended June 30, 2020, was $328.5 million, or $1.25 per diluted share on an adjusted diluted share basis of 263.8 million shares, compared to $345.2 million, or $1.31 per diluted share, in the year ago period. Adjusted EBITDA* for the six months ended June 30, 2020, was $802.8 million, as compared to $811.0 million in the prior year period.
Q2 2020 Earnings Conference Call
Waste Connections will be hosting a conference call related to second quarter earnings on August 7th at 8:30 A.M. Eastern Time. To access the call, listeners should dial 800-747-0367 (within North America) or 212-231-2915 (international) approximately 10 minutes prior to the scheduled start time and ask the operator for the Waste Connections conference call (a passcode is not required). A replay of the conference call will be available until August 14, 2020 by calling 800-633-8284 (within North America) or 402-977-9140 (international) and entering Passcode # 21964629. The call will be broadcast live over the Internet through a link on the Company’s website at www.wasteconnections.com. A playback of the call will be available on the Company’s website.
Waste Connections will be filing a Form 8-K on EDGAR and on SEDAR (as an "Other" document) prior to markets opening on August 7th, providing the Company's third quarter 2020 outlook for revenue, core price plus volume growth for solid waste and adjusted EBITDA*.
* A non-GAAP measure; see accompanying Non-GAAP Reconciliation Schedule
About Waste Connections
Waste Connections is an integrated solid waste services company that provides non-hazardous waste collection, transfer, disposal and recycling services in mostly exclusive and secondary markets in the United States and Canada. Through its R360 Environmental Solutions subsidiary, Waste Connections is also a leading provider of non-hazardous oilfield waste treatment, recovery and disposal services in several of the most active natural resource producing areas in the United States, including the Permian, Bakken and Eagle Ford Basins. Waste Connections serves more than seven million residential, commercial, industrial, and exploration and production customers in 42 states in the U.S., and six provinces in Canada. The Company also provides intermodal services for the rail haul movement of cargo and solid waste containers in the Pacific Northwest.
For more information, visit the Waste Connections web site at www.wasteconnections.com. Copies of financial literature, including this release, are available on the Waste Connections website or through contacting us directly at (905) 532-7510. Investors can also obtain these materials and other documents filed with the U.S. Securities and Exchange Commission (“SEC”) and the Canadian securities regulators free of charge at the SEC’s website, www.sec.gov, and at the System for Electronic Document Analysis and Retrieval maintained by the Canadian Securities Administrators at www.sedar.com.