For the three-months ended June 30, 2021, total revenues increased by 334.2% or $3.6 million, and increased by 116.6% or $4.9 million for the six-month period. The increases were primarily due to higher volumes in 2021, as the prior-year periods were impacted by approximately three months of closure. Casino revenues increased by 331.5% or $3.3 million for the second quarter, and rose by 129.2% or $4.7 million for the six-month period. Much of that increase was from slot revenue, which grew by $2.7 million and $3.9 million for the three- and six-month periods, respectively. Table games revenue improved $0.6 million and $0.8 million, respectively, with the hold percentage increasing at Grand Lodge. Table games were not open at Stockman’s during the 2021 periods.
Adjusted Segment EBITDA for the three-months ended June 30, 2021 increased by $2.0 million to $1.4 million. For the six-months ended June 30, 2021, it increased by $3.6 million to $2.6 million. Both higher casino revenues and continued cost controls, specifically regarding labor and marketing expenses, have benefited operating results. As restrictions have eased in Nevada, both properties have improved revenues while continuing to maintain control of expenses.
Contracted Sports Wagering
The Contracted Sports Wagering segment consists of our on-site and online sports wagering skins in Colorado and Indiana. Revenues and Adjusted Segment EBITDA were both approximately $1.5 million during the three-months ended June 30, 2021, and approximately $2.5 million for the six-months ended June 30, 2021. Our fourth and fifth sports wagering skins commenced operations on April 1 and April 23, 2021, resulting in strong sequential growth in both revenues and Adjusted Segment EBITDA. For the three-month period ended June 30, 2020, when only two sports wagering skins were live, revenues and Adjusted Segment EBITDA were both approximately $0.5 million. During the six-months ended June 30, 2020, revenues and Adjusted Segment EBITDA were approximately $0.9 million and $0.8 million, respectively. The last remaining skin is expected to commence operations in the coming months.
We receive a percentage of defined revenues of each skin, subject to annual minimums. When all six skins are in operation, we should receive a contractual minimum of $7 million on an annualized basis, with minimal related expenses.
Corporate
Corporate expenses for the three- and six-month periods ended June 30, 2021 rose due to an increase in accrued bonus compensation, reflecting the Company’s improved operating results, and professional fees. These increases were partially offset by the allocation of corporate service costs to the casino properties during 2021.
In April 2020, we began allocating certain costs to the properties, consistent with the practice of most public casino companies. Previously, such costs were carried at the corporate level. For the three-months ended June 30, 2021, a total of $426,000 was allocated, consisting of $115,000 of costs allocated to our Mississippi segment, $113,000 to Colorado, $85,000 to Indiana and $113,000 to Nevada. For the six-months ended June 30, 2021, a total of $832,000 was allocated, consisting of $244,000 of costs allocated to Mississippi, $225,000 to Colorado, $177,000 to Indiana and $186,000 to Nevada. Management believes that such allocations are appropriate, as the corporate team provides additional support to each of our properties, and that such allocations make our segment results more comparable to other casino companies.
Non-GAAP Financial Measure
“Adjusted EBITDA” is earnings before interest and other non-operating income (expense), taxes, depreciation and amortization, pre-opening expenses, impairment charges, asset write-offs, recoveries, gain (loss) from asset disposals, project development and acquisition costs, and non-cash share-based compensation expense. Adjusted EBITDA information is presented solely as supplemental disclosure to measures reported in accordance with generally accepted accounting principles in the United States of America (“GAAP”) because management believes this measure is (i) a widely used measure of operating performance in the gaming and hospitality industries and (ii) a principal basis for valuation of gaming and hospitality companies. In addition, a version of Adjusted EBITDA (known as Consolidated Cash Flow) is utilized in the covenants within our credit facility, although not necessarily defined in the same way as above. Adjusted EBITDA is not, however, a measure of financial performance or liquidity under GAAP. Accordingly, this measure should be considered supplemental and not a substitute for net income (loss) or cash flows as an indicator of the Company’s operating performance or liquidity.