Thomas Lydon
Analyst · Citigroup
Thanks, Russ, and good morning to all on the call. First, I'd like to echo Russ' comments in thanking all of our fellow employees, who are leading by example and helping us to navigate the COVID-19 world, and to all of our team members for their great work preparing us for the listing on the New York Stock Exchange and the continued efforts in our transition from private to public company.
Let's start with our consolidated financial results, followed by an overview of the segment-level performance and conclude with an overview of our strong balance sheet and liquidity. We have presented adjusted numbers in the press release and investor presentations to assist investors in understanding the underlying performance of the business, exclusive of the noncash impairment charge, the purchase accounting adjustments associated with API acquisition, business classified as held for sale or divested as of March 31, 2020, and nonrecurring changes related to our listing and public company readiness work.
For the 3 months ended March 31, 2020, total adjusted net revenues declined by $21 million or 2.5% to $820 million compared to $840 million in the prior year period with segment growth of 4.9% in Specialty Services, offset by a decline of 25% in Industrial Services as we delivered on our strategy to improve margins as opposed to growing the top line. Shelter-in-place orders that went into various levels of effect in March slightly reduced our volume of work year-over-year in our Safety and Specialty Services segments.
Our gross margin was 22.4%, representing a 341 basis point increase compared to prior year adjusted gross margin of 19%. The increase was primarily due to the improved project selection, conditions and execution in our Industrial Services segment. Adjusted selling, general and administrative expenses increased by $25 million from $119 million in the first quarter of 2019 to $144 million due to business growth related to increases of $17 million focused on compensation and adding resources to drive our organic growth strategy, unabsorbed overhead of $3 million and noncash share-based compensation of $1 million. Additionally, we incurred recurring corporate costs related to being a public company of $3 million.
During the quarter, we took a $208 million noncash impairment charge concentrated in our Specialty and Industrial Services segments, triggered largely by COVID-19 outbreak and the domino effects on our business of the local, state and national shelter-in-place orders. The noncash impairment charge was calculated according to GAAP accounting requirements in relation to our preliminary estimates of each of our reporting units' carrying values and may change in future periods as the accounting for the APi acquisition is finalized.
Capital expenditures were $11 million or 1.3% of adjusted revenues for the 3 months ended March 31, 2020, which represents a decrease from capital expenditures of $22 million or 2.6% of adjusted net revenues for the prior year period, primarily due to timing. We operate an asset-light model, which allows us to increase our volume without the need for significant additional capital expenditures. On an annual run rate, our capital expenditures is historically less than 2% of net revenues.
Operating cash flow for the first quarter was $55 million. Capital expenditures, as I mentioned, were $11 million. And we had $9 million of nonrecurring items resulting in adjusted free cash flow of $53 million. Based on adjusted EBITDA of $61 million, this implies adjusted free cash flow conversion of approximately 87%, exceeding our goal of 80%. Cash flow in the quarter largely benefited from lower working capital needs in our Industrial Services segment and specific actions to temporarily hold payables a bit longer than normal at the end of March due to the uncertainty of COVID-19.
Our balance sheet and liquidity profile remained strong. As of March 31, 2020, our $436 million in cash on hand included $200 million drawn against our revolving credit facility. As discussed on our last call, given the uncertainties regarding COVID-19 global pandemic, in late March 2020, we drew down $200 million under our revolving credit facility, which we subsequently repaid in April. After noting the strong actions taken by the central bank to ensure stable banking and debt markets, our strong cash generation has continued. And as of the end of May, we had approximately $275 million in cash and cash equivalents on our balance sheet. Based on our early expense reduction actions, recent operating results in our cash and available borrowing, we believe that we are well positioned to manage our way through the COVID-19 economic upheaval.
I will now discuss results in more detail for each of our 3 segments, beginning with Safety Services, which represented more than half of our adjusted net revenues for the quarter. Safety Services adjusted net revenues for the 3 months ended March 31, 2020, were relatively flat. This is due to a combination of the mix and timing of contract revenues, combined with some impact of temporary customer closures due to COVID-19 and shelter-in-place orders in March. Adjusted gross margins of 30.2% represented a 61 basis point increase from prior year, largely attributable to mix of our services. Adjusted EBITDA margins of 12.5%, a 65 basis point decline from prior year, was due to added employee costs and increase in unabsorbed overhead costs due to timing of demand for our services.
Specialty Services net revenue for the 3 months ended March 31, 2020, increased by $14 million or 4.9% compared to the same period in the prior year. The increase in net revenue was driven by increased demand from our customers and timing of contracts, slightly offset by negative impacts of COVID-19 in March. Adjusted gross margins of 12.7%, representing a 183 basis point increase due to improved job site conditions, project selection and mix of work, adjusted EBITDA margin of 6%, a 41 basis point increase from prior year.
Industrial Services. Excluding businesses classified as held for sale or divested as of March 31, 2020, Industrial Services net revenues for the 3 months ended March 31, 2020, decreased by $33 million or 25% compared to the same period in the prior year due to decreased volume as we delivered on our strategy of improving margins as opposed to growing top line. Adjusted gross margins of 18.2% represents a 1,591 basis point increase from our prior year as a result of productivity increases due to improved project selection, conditions and execution. Adjusted EBITDA margin of 10.1% is a 1,086 basis point increase from prior year due to the factors mentioned above.
We expect the remainder of 2020 will continue to be affected by COVID-19. And accordingly, it's too early to provide full year guidance for 2020. However, I can reconfirm some insight for modeling purposes. We expect capital spending for the year to be approximately $30 million to $35 million. We expect annual future depreciation of approximately $70 million. Our cost of capital is approximately 5% and our adjusted mid- and long-term effective tax rate should be approximately 21%. Our fully diluted share count, assuming the conversion of all 64.5 million warrants outstanding, is approximately 195.5 million shares.
I will now turn the call over to Jim.