Thanks, Paul. Consolidated total revenue for the first quarter of 2024 was $315.2 million, a decrease of 0.8% compared to $317.9 million in the prior year period. The decrease was primarily driven by our Infrastructure segment, which was partially offset by increases at our Spectrum and Life Sciences segments. Net loss attributable to common stockholders for the first quarter of 2024 was $17.7 million or $0.22 per share compared to a net loss of $10.2 million or $0.13 per share in the prior year period.
Total adjusted EBITDA was $12.8 million in the first quarter of 2024, an increase from $4.9 million in the prior year period. The increase was driven by all of our segments. At Infrastructure, revenue decreased 1.2% to $307.9 million from $311.7 million in the prior year quarter. This decrease was primarily driven by the timing and size of projects at DBMG's commercial steel fabrication and erection business and Banker Steel, which was partially offset by an increase in revenue at the industrial maintenance and repair business due to timing and size of projects.
Infrastructure adjusted EBITDA for the first quarter of 2024 increased to $18.3 million from $16.3 million in the prior year period. The increase was driven by higher margins at DBMG's commercial structural steel fabrication and erection and the industrial maintenance and repair businesses, which was partially offset by an increase in recurring SG&A primarily as a result of compensation-related expenses as well as a decrease in margin at the construction modeling and detailing business.
As of March 31, 2024, and in line with our expectations, reported backlog was $939.1 million and adjusted backlog, which takes into consideration awarded but not yet signed contracts, was $1.2 billion compared to a reported backlog of $1.1 billion and adjusted backlog of $1.2 billion at the end of 2023. DBMG ended the quarter with $159.7 million in principal amount of debt, which is a decrease of $39.1 million from year-end 2023, primarily driven by the reduction of the credit facility and normal debt amortization payments. DBMG has been able to reduce its debt obligations through line reduction as investor working capital has continued to return to the business, a trend that began at the end of 2023. As backlog stabilizes, we expect flat working capital needs throughout 2024. And as a reminder, DBMG has reduced its outstanding debt by approximately $73 million in the last 6 months.
At Life Sciences, revenue was $1 million, an increase of $0.5 million from the prior year quarter. The increase in revenue was attributable to R2, primarily due to growth in unit sales in North America. Life Sciences adjusted EBITDA losses decreased for the quarter, which was primarily due to lower equity method losses recognized from our investment in MediBeacon and to a lesser extent, a decrease in SG&A expenses at R2 as well as an increase in revenue, primarily due to an increase in unit sales.
At Spectrum, revenue was $6.3 million, an increase of $0.6 million compared to the first quarter of 2023, primarily driven by the launch of new networks and expanded coverage with existing customers. The increase is partially offset by the termination of a number of smaller networks and individual markets subsequent to the comparable period. Spectrum reported adjusted EBITDA in the first quarter increased to $1.6 million from $0.4 million in the prior year quarter. The increase was primarily due to the increase in revenue and the impact of the personnel realignment implemented in the second half of 2023.
Nonoperating corporate adjusted EBITDA losses were $2.9 million for the quarter of 2024, an improvement from the first quarter of 2022 of $0.6 million. The improvement was primarily driven by decreases in compensation-related expenses, consulting fees and insurance expense, which was partially offset by an increase in legal fees. At the end of the first quarter, the company had $38.4 million of cash and cash equivalents, excluding restricted cash compared to $80.8 million as of December 31, 2023.
On a stand-alone basis, as of March 31, 2024, our nonoperating corporate segment had cash and cash equivalents of $9.2 million compared to $2.5 million at the end of '23. As announced earlier in the year, we received notice that we are not in compliance with NYSE listing requirements as our stock price has fallen below $1 per share. We are working on options to regain compliance with the NYSE which includes the potential for a reverse stock split as disclosed in our recently filed proxy statement.
As of March 31, 2024, INNOVATE had total principal outstanding indebtedness of $687 million down $35.8 million from $722.8 million at the end of 2023, driven by the decrease of infrastructure's outstanding debt, which was partially offset by R2's extension in Lancer Capital, which capitalized interest payments into the principal balance.
With that, operator, we'd now like to open up the call for questions.