Bob Pragada
Chair and Chief Executive Officer at Jacobs Solutions
Thank you, Bert, and I'm delighted to welcome you to Jacobs at such an exciting time. Good day, everyone, and thank you for joining us to discuss our fourth quarter and fiscal year 2024 business performance. Now moving to Slide 4. We reached a critical milestone on our strategic shift toward a simpler, higher-value and higher-margin portfolio during the quarter as we closed the separation transaction involving our Critical Mission Solutions and Cyber Intelligence businesses, on September 27, 2024, culminating with Amentum successfully listing on the NYSE under the ticker, AMTM.
This strategic shift has been well received by the market, highlighting confidence in our focused direction and reinforcing our commitment to delivering sustained value and growth for our shareholders. Upon closing the transaction, we received $911 million, which was concurrently used to repay existing debt. Additionally, as a part of the transaction, we received a 7.5% equity ownership in Amentum, which could rise to 8%. At the same time, Jacobs shareholders became 51% owners in shares of Amentum and their ownership stake could increase up to 55%.
I want to take a moment to emphasize how important this transaction is for Jacobs. As a more sharply focused company operating in robust end markets with -- strong secular growth tailwinds, we believe Jacobs is in an excellent position to create substantial shareholder value. Our simplified structure, global delivery model and ongoing operating efficiencies, positions us nicely to build on a strong end to FY '24. This is a testament to the dedication and relentless efforts of our employees, whose hard work is paving the way forward for two exceptional companies. I'd like to extend my deepest gratitude and congratulations to each of them for their role in this pivotal transformation.
Turning to Slide 5. We provide an overview of our financial performance for the fourth quarter and fiscal year 2024, with CMS and C&I under discontinued operations. So please note, the results we highlight are related only to continuing operations. Focusing in on the quarter. Total gross revenue increased 4% in Q4, with adjusted net revenue rising 4%. GAAP EPS from continuing operations was $2.38, and includes a positive $1.20 impact from the mark-to-market of our investment in Amentum, netted against amortization of intangibles, as well as a $0.19 impact from transaction, restructuring and other related costs.
Excluding these items, fourth-quarter adjusted EPS was $1.37, marking a 28% increase compared to the previous year. Adjusted EBITDA for Q4 came in at $289 million, which represented a 12% growth versus FY '23. Overall, we are pleased to close out the year with such a positive performance. Looking at the full year, total gross revenue increased 6% with adjusted net revenue rising 5%.
GAAP EPS from continuing operations was $4.79 and included a positive $0.50 impact, related primarily to the net effect of amortization of acquired intangibles and the mark-to-market of our investment in Amentum, and a negative impact of $1.07 from transaction, restructuring and other related costs, which again, were materially driven by the separation transaction. Excluding these items, adjusted EPS from continuing operations was $5.28, marking a 16% increase compared to the previous year.
Adjusted EBITDA for the -- for FY '24 was $1.06 billion, representing a 9% increase versus FY '23. Our trailing 12-month book-to-bill was 1.35 times as our consolidated backlog increased 23% year-on-year in Q4. These are metrics which we [Phonetic] watch closely and we are encouraged by the trajectory we're delivering on, with an extremely strong 1.67 times book-to-bill for the fourth quarter.
When we analyze our backlog, we are seeing this trend across gross revenue and backlog as well as gross profit and backlog, which is a good indicator as we think about our growth for FY '25 and beyond. Turning to Slide 6, and building on my backlog and book-to-bill commentary. I'm excited to report that during the quarter, we continued to deliver substantial wins across the business and across geographies, a testament to our market positioning, deep domain expertise, and long-term trusted client relationships.
As we move forward as a simpler and more focused company, we will be providing commentary on revenue across three key end markets, water and environmental, life sciences and advanced manufacturing and critical infrastructure. These end markets roll up to infrastructure and advanced facilities, which is comprised of our historic P&PS business and the retained portion of Divergent Solutions. PA Consulting remains in its own segment and is unchanged.
On Slide 14, in the appendix, we provide a graphic that depicts our new structure and end-market focus. Moving on to how our end markets are performing. Water and Environmental is demonstrating impressive growth. Water conveyance, water infrastructure, wastewater, potable reuse and efficient asset management are just some of the key drivers of our client spend. And we have been successful servicing demand across these categories with double-digit growth in Q4.
Notably, during Q4, we delivered several key wins, including our appointment by the Los Angeles Sanitation and Environment to provide progressive design build services for the Donald C. Tillman Advanced Water Equalization basins, a critical part of the LA -- of LA's long-term plans to increase recycled water production by 2035. Significantly, this is one of the single largest bookings in the Water and Environmental end market in our company's history. In Life sciences and Advanced Manufacturing, we continue to see robust demand from Life Sciences clients, boosted by GLP-1 investment, and we expect this trend to continue in FY '25.
In Semiconductors, we are diversifying our customer base and expanding our global reach. One example is our recent design -- design win for a new -- test and assembly facility with CG Semi in India. The facility will manufacture advanced and legacy packages for industries such as automotive, consumer, industrial and 5G communications, and facilitate our strategic positioning in India where electronics manufacturing spend is expected to grow meaningfully.
Global investment spending across Life Sciences, Semis and Data Centers is creating a robust backdrop for Jacobs in FY '25 and beyond. Moving on to Critical Infrastructure. During the quarter, we secured a technical project manager role with the Department of Energy Security & Net Zero in the UK. A great example of how we are leveraging our differentiated offering in energy security and transition that demonstrates the power of our partnership and greater collaboration with PA Consulting.
We will provide project management and advisory services along with associated strategic support to the Hydrogen and Industrial Carbon Capture program that includes consulting, end-to-end innovation, design and analytics. We are also seeing continued traction in the Middle East as Saudi Vision 2030 significantly increases the number of opportunities across critical infrastructure.
Notably, during Q4, we announced a new award to lead advisory, design and engineering for the King Salman International Airport, in Riyadh, Saudi -- Saudi Arabia. Our outlook for near- and long-term expansion in the region remains intact and we are seeing signals of strong demand for infrastructure projects across the globe in the early days of FY '25.
In summary, we remain confident in our ability to grow the business and deliver superior execution to meet our clients' expectations. We're excited for the future as a more focused company and look forward to presenting our strategic vision for growth over the coming years at our Investor Day, in Miami, on February 18.
Now, I'll turn the call over to Venk to review our financial results in further detail.