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Operator
Greetings and welcome to the ABM Industries Incorporated fourth-quarter 2024 earnings call. (Operator Instructions) As a reminder, this conference is being recorded. At this time, it is now my pleasure to introduce Paul Goldberg, Senior Vice President of Investor relations. Mr. Goldberg, you may now begin.
Paul Goldberg - Senior Vice President of Investor Relations
Good morning, everyone and welcome to ABM's fourth quarter, 2024 earnings call. My name is Paul Goldberg and I'm the senior Vice President of Investor Relations at ABM. With me today are Scott Salmirs, our President and Chief Executive Officer, and Earl Ellis, our Executive Vice President and Chief Financial Officer. Please note that earlier this morning, we issued our press release announcing our fourth quarter and full year 2024 financial results as well as our 2025 outlook. A copy of that release and an accompanying slide presentation can be found on our website abm.com. After Scott and Earl's prepared remarks, we will host a Q&A session.
But before we begin, I would like to remind you that our call and presentation today contain certain predictions, estimates, and other forward-looking statements. Our use of the words estimate, expect, and similar expressions are intended to identify these statements. And they represent our current judgment of what the future holds. While we believe them to be reasonable, these statements are inherently subject to risks and uncertainties that could cause our actual results to differ materially. These factors are described in a slide that accompanies our slide presentation as well as our filings with the SEC.
During the course of this call, certain non-GAAP financial information will be presented. A reconciliation of historical Non-GAAP numbers to GAAP financial measures is available at the end of the presentation and on the company's website under the Investor tab.
And with that, I would like to now turn over the call to Scott.
Scott Salmirs - President, Chief Executive Officer, Director
Thanks Paul. Good morning and thank you all for joining us today to discuss our fourth quarter results and fiscal 2025 outlook. ABM finished the year on a high note driven by double digit revenue growth and technical solutions and aviation in the fourth quarter. And our performance also reflects the continued resilience of our business and industry segment.
We posted 3% organic revenue growth and delivered adjusted EPS of $0.90, both of which were moderately above our expectations. These results capped a great year for ABM highlighted by strong execution on our elevated initiatives, balanced capital deployment, and more importantly, positive results in a volatile macro environment.
I'm thrilled with ABM's positioning as we begin fiscal 2025. We have emerged a stronger company after navigating through some macro turbulence over the last couple of years. And although it's still early, it appears as though our key commercial real estate markets are near an inflection point and returning to growth. Market improvement, coupled with the strategic investments we've been making across our business, gives me confidence in our future growth trajectory and our enhanced ability to service clients in dynamic markets.
Before we discuss 2025, let me quickly run through a few of our important accomplishments in fiscal 2024. First, we achieved remarkable results in our technical solutions and aviation segments in 2024. The big story of technical solutions which grew 16% organically was the rapid expansion of our microgrid service line complemented by growth in our data center related business.
Our RavenVolt team did a fantastic job executing on a very complex microgrid project schedule which shows no signs of abating. This strong growth helped drive an increase in full year segment earnings.
Our aviation business grew 12% in 2024 as we benefited from healthy travel markets and also from our truly differentiated service offering ABM Clean. Our strategy of offering a more comprehensive service solution coupled with differentiated artificial intelligence based technology is supporting growth in excess of the broader aviation market.
I was also pleased with B&I's results which significantly outperformed the expectations we headed into 2024. Organically, revenue was down less than 1% for the year benefiting from our diverse client and service mix, our leading market position, and our penetration in the higher performing Class A segment of the market. Additionally, our geographic diversification including the UK and the continual focus on growth also contributed to driving our results.
We also made significant progress on our internal initiatives in 2024. One key accomplishment was the introduction of our workforce productivity optimization tool. This tool which allows our team to identify opportunities for productivity improvements based on the facility archetype has been an enabler to reducing our labor usage. Labor as a percent of revenue was down nearly 1% in the fourth quarter.
And while there are many factors that contributed to that, the workforce optimization productivity rollout played an important role. This tool when more broadly implemented offers significant opportunities to manage labor more efficiently across our service base. We also further commercialized ABM Clean and ABM performance solutions during the year.
As a reminder, ABM Clean is our AI-based, purpose-built application for the aviation industry. ABM performance solutions is our technology driven multi service offering that integrates data from multiple sources to allow our teams to deliver enhanced outcomes for our clients and their customers under a single service contract.
Both are gaining momentum across our portfolio and clients utilizing these offerings now represent a meaningful portion of 2024 revenue.
Lastly, in addition to what I've already mentioned, we've made some important early investments in artificial intelligence. We see many use cases across ABM including expanding revenue opportunities through data mining, quicker response times, and enhancements on RFPs at our deal desk and delivering an improved employee experience through HR platforms.
So it's early days, we are convinced these investments will provide critical differentiation as we move forward. From a capital allocation perspective, we were quite balanced in 2024. We repurchased $56 million of stock at an average price of under $48 per share. And we continued our long-standing record of raising our annual dividend.
In fact, after the quarter ended, our Board of Directors approved an 18% increase in our dividend which underscores confidence in our long-term earnings trajectory and also brings us closer to our 30% of adjusted net income payout target.
We simultaneously invested for the long term by acquiring quality uptime services which expands our position in the faster growing data center vertical by adding new capabilities in uninterrupted power supply systems and battery maintenance.
Now, let's look forward to 2025 and walk through our end markets so we can highlight why we are encouraged about the coming year and the longer term. With respect to B&I, a recent JLL research report suggests that the tide is beginning to turn for the US commercial real estate market as availability rates declined for the first time in several years, reflecting acceleration in leasing activity and a slowdown of new supply.
The report went on to detail that leasing activity continued to grow in the third calendar quarter while office downsizing has normalized as tenants have become more comfortable with their footprint. The other positive dynamic is that employers continue to drive greater office attendance. According to the same JLL report, office attendance policy amongst the Fortune 100 drove the average weekly office requirement up to 3.3 days. This has been broadly reported. These policy shifts towards in-office work are likely to continue. For those reasons, we are confident that our B&I segment will return to growth soon, potentially in the back half of 2025. We expect our manufacturing and distribution markets to be healthy in 2025, driven by a strong US industrial economy and by secular growth in the US semiconductor and data center markets.
The World Semiconductor Trade Statistics organization expects 15% semiconductor growth in the Americas in 2025.
And the data center services market is expected to grow 10% annually for the next several years according to a research and markets report publication. We have continued to win new business in these end markets and have invested important resources to further leverage these trends.
I am confident that our M&D segment will return to mid-single digit organic growth. Once forecasted new wins come online and the impact of the rebalancing of a large and complex client we have previously discussed moderates targeting by the end of the year.
As I mentioned, aviation had an amazing year leveraging healthy travel markets and their differentiated service offerings. They also benefited from numerous capital projects across the country as both public and private entities work to refresh and revitalize aging US airport infrastructure. LAX, LaGuardia, JFK, and O'Hare are just a few examples of where these kinds of projects are happening.
Our clients at these refresh facilities place a higher emphasis on maintenance and the traveler experience as they seek to drive traffic and revenue which completely aligns with ABM's strength and focus. This secular investment cycle should provide a multitude of opportunities for us over the next several years.
Looking to next year, a recent air passenger forecast report indicates North American air passenger traffic is forecasted to grow approximately 5.6% in 2025 after expected growth of 9.2% in 2024. So markets remain constructive but not quite as exuberant as this past year. Our pipeline is healthy but sales cycles tend to be longer in aviation than in other parts of our portfolio. So the back half of the year may be stronger for us from a growth perspective.
Education is expected to be stable and continues to provide a foundation of earnings and cash flow that can be utilized across ABM. Over the past couple of years, we've been focusing on the more substantial revenue opportunities afforded by our APS offering. Sales cycles tend to be longer for these types of prospects that benefit from APS, namely larger school districts, colleges, and universities. And we've been steadily building a nice client resume.
The other benefit of APS is it creates customer stickiness and is additive to margin reflecting the enhanced value we deliver when we bundle services. This approach helped us outgrow the market in 2024 as we posted 3% organic growth for this business for the full year and delivered a margin of 6.1%.
Lastly, regarding technical solutions, we expect our microgrid business will continue to remain healthy in 2025 driven by strong market conditions and a backlog exceeding $500 million. In fact, we booked well over $100 million in new orders in the fourth quarter, including additional work for a leading Big Box retailer and new battery energy storage systems for an emerging private renewal power system developer.
According to the firm research Nefta, the US microgrid market which was approximately a $10 billion market in 2024 is expected to grow to $50 billion over the next decade, providing significant runway for us.
This growth will be fueled by increasing energy consumption due to the proliferation of AI, the fragility of the electrical grid and from organizations looking for ways to more efficiently manage electrical demand and storage.
Additionally, we expect the rapid acceptance and expansion of AI will drive significant growth in data center and mission critical infrastructure. And we have a growing position in this market.
It's still too early to say what impact if any the new administration's policies with regard to interest rates and energy policy will have on our bundled energy solutions and EV service lines. We are hopeful that general demand trends will tick up over the next year or two. All in all, we see ample room for growth and technical solutions to ensure a strong 2025. To sum it up, we feel good about our markets and expect to grow revenue, adjusted EPS, and adjusted margin in 2025.
As such, we expect adjusted EPS to be in the range of $3.60 to $3.80 and for our adjusted EBITDA margin to be in the range of 6.3% to 6.5%.
With that, let me turn it over to Earl to walk you through the details and I'll be back shortly with some final comments.
Earl Ellis - Chief Financial Officer, Executive Vice President
Good morning, everyone. As Scott mentioned, we are pleased with our fourth quarter and full year results and we believe we are well positioned for growth in 2025 and beyond.
But before we get into our 2025 outlook, let me quickly review our fourth quarter results. For those of you following along with our earnings presentation, please turn to slide 5. Fourth quarter revenue of $2.2 billion increased 4% comprised of 3% organic growth with the remaining 1% driven by our third quarter acquisition of quality uptime services. Organic revenue growth was once again, led by technical solutions and aviation which grew 25% and 11% respectively.
Education was essentially flat. Our B&I segment remains resilient, declining less than 1% benefiting from our diverse client and service base. Lastly, manufacturing and distribution revenue came in above our expectations declining by only 1%.
Moving on to slide 6, we recorded a fourth quarter net loss of $11.7 million or $0.19 per share as compared to net income of $62.8 million or $0.96 per share last year. This result was primarily attributable to a $59.7 million adjustment to our contingent consideration related to the RavenVolt earnout. The negative impact of prior year self-insurance adjustments, legal settlements, higher corporate investments, and lower segment operating earnings partially offset by lower income tax.
The earnout adjustment was driven by RavenVolt's very strong 2024 performance and reflects our current estimate of the payout under the acquisition earnout plan. I will discuss RavenVolt's performance in greater detail in a few minutes. Adjusted net income of $57.5 million and adjusted earnings per share of $0.90 decreased 13% and 11% respectively from the prior year.
In addition, adjusted EBITDA decreased 11% to $128 million and adjusted EBITA margin was 6.1% down 110 basis points. These decreases were largely driven by lower segment earnings which I'll discuss shortly as well as some planned increases in corporate costs versus a tough comparable last year. Adjusted EPS benefited from lower share count driven by our share repurchase activity.
Now turning to our segment results beginning on slide 7. B&I revenue of $1 billion declined less than 1% as the segment continued to prove resilient. This was driven by our diversification including our geographic footprint, exposure to the sport and entertainment and healthcare markets, and from a mix of higher performing Class A properties.
As Scott mentioned, macro commercial real estate data is improving, especially leasing activity. We are hopeful these positive dynamics along with our sales initiatives will drive B&I's inflection to organic growth later in 2025. B&I's operating profit was down approximately $13 million to $72 million and the operating margin was 7%, a decrease of 120 basis points. These declines were primarily attributable to an unfavorable $7 million year over year impact from the adjustments to insurance reserves, and also included approximately $4 million to $5 million of other discrete costs.
Aviation revenue grew 11% to $276.5 million driven by strong travel markets and new business wins from both the airport and airline sides of the business. We are proud of the fact that aviation set a new record in 2024 for packing $1 billion and servicing 27 of the 30 busiest US airports.
This was achieved in large measure by offering differentiated services supported by our amazing team. Aviation's operating profit was $18.6 million up 14% and margin was 6.7%, an increase of 10 basis points. These improvements were largely driven by operating leverage on higher revenue.
Turning to slide 8. Manufacturing and distribution revenue declined by just under 1% to $387.7 million primarily due to the rebalancing of work by a large e-commerce customer and by our choice to exit a sizable client which did not meet our financial hurdles largely offset by growth from other clients.
Rebalancing has been less impactful than initially expected as the client has been hesitant to make changes at the pace originally communicated. As Scott mentioned, we see a clear path back to mid-single digit organic growth by the end of 2025. Operating profit slightly decreased to $40.4 million and operating margin was 10.1% down 30 basis points, profit and margin performance principally reflects mix as well as increased investments in sales related positions to drive growth in target markets like semiconductors and datasets.
Education revenue was up slightly at $230 million as the onboarding of new clients more than offset reduced activity at a number of cost plus accounts. Education operating profit increased 28% to $13.1 million and margin was 5.7%, an increase of 130 basis points. This was largely attributable to improved labor efficiency and mix. Technical solutions revenue grew 35% to $257.4 million including 25% organic growth and 10% from our acquisition of quality uptime services.
Organic growth was driven by extremely strong microgrid project activity and continued growth in our mission critical business. While bundled energy solutions and EV project activity remains soft. Our microgrid business had a phenomenal 2024 with revenue and earnings both up 2.5 times compared to the prior year.
Looking forward, demand from our energy resiliency and data center markets should remain robust supported by our year-end backlog of over $500 million. Technical solutions operating profit grew 15% to $28 million, which included a $4.3 million cost associated with the remediation of a past energy performance contract.
Operating margin was 10.9%. Excluding the previously mentioned $4.3 million, cost margin would have been 12.6%, 20 basis points below last year.
Moving on to slide 9. We ended the fourth quarter with total indebtedness of $1.4 billion including $57.9 million of standby letters of credit, resulting in a total debt to perform adjusted EBITDA ratio of 2.6 times. At the end of Q4, we had available liquidity of $488.2 million including cash and cash equivalents of $64.6 million. Free cash flow in the fourth quarter was $15 million.
This result which was $106 million below last year reflected a build in working capital related to supporting the company's strong growth, especially at ATS in the final month of the fiscal year. For full year 2024, we generated $167 million of free cash flow or $270 million after normalizing for in-year ELEVATE and integration costs of $49 million. This is down $87 million from last year's normalized free cash flow of $303 million which is adjusted for the receipts of $24 million in employee retention credits, a $66 million repayment of the Cares Act, and in-year ELEVATE and integration cost of $71 million.
Free cash flow generation remains a key focus in 2025 driven by our asset light and flexible business model. Interest expense was $21.8 million slightly higher than the prior year, largely reflecting our recent acquisition. Regarding capital allocation, we purchased a little over 610,000 shares in the fourth quarter at an average cost of $52.42 per share for a total cost of $32 million.
For the full year, we repurchased approximately 1.2 million shares at an average cost of $47.86 per share for a total cost of $55.8 million. At year end, we had $154 million remaining under our share repurchase program. Balance capital allocation continues to be a hallmark of ABM. For the full year, we returned about $113 million to shareholders in the form of dividends and share repurchases and spent $114 million on acquisitions.
Now let's move on to our fiscal 2025 outlook as shown on slide 10. As Scott mentioned, we are excited about our 2025 plan and we expect to grow revenue, adjusted EBITDA, and adjusted EBITDA margin on a year-over-year basis. Beyond that, 2025 is an important year as we expect our two largest segments, B&I and M&D will return to growth in the back half of the year, assuming recent market trends continue.
As such, we are forecasting full year 2025 adjusted EPS to be in the range of $3.50 to $3.80. At the midpoint, this represents a 4% increase over our 2024 adjusted EPS of $3.57. Adjusted EBITDA margin is expected to be between 6.3% and 6.5% for the full year, up 20 basis points at the mid-point versus the 6.2% we posted in 2024.
Our interest expense forecast is $76 million to $80 million down from the $85 million we incurred in 2024. We expect the normalized tax rate before discrete items to be between 29% and 30%.
Moving to free cash flow, full year normalized free cash flow is anticipated to be in the range of $250 million to $290 million. This forecast is normalized for an estimated $30 million to $40 million of ELEVATE and integration costs and $16 million of the total earnout payment that will be recorded as a use of operating cash.
The remaining $59 million of earnout will be recorded as cash used from financing. As is normally the case, we expect free cash flow to be stronger in the back half of the year. With that, let me turn it back to Scott for closing comments.
Scott Salmirs - President, Chief Executive Officer, Director
Thanks, Earl. I want to take a moment to congratulate our team on a great 2024. Their tireless efforts enable us to consistently exceed our internal plans throughout the year, which is even more exceptional, given the fact that we've been working tirelessly on upgrading and transforming our technology and data platform as well as our end-to-end processes.
Through it all, we remain committed to our clients and to our longer term financial goals and most importantly to our strategy of investing in our business. We're excited about our positioning as we begin 2025 and by the progress we've already made on several initiatives. Thanks again for joining our call today. And with that, let me take some questions.
Operator
(Operator Instructions)
Thank you. Tim Mulrooney with William Blair.
Tim Mulrooney - Analyst
Hi Earl. Good morning.
Earl Ellis - Chief Financial Officer, Executive Vice President
Good morning.
Tim Mulrooney - Analyst
The M&D segment, performed quite a bit better than we were expecting. I guess, because the customer rebalancing wasn't as large as initially expected. Can you help frame this for us? What was the headwind you were originally expecting from the rebalancing and what your base case scenario is at this point?
Scott Salmirs - President, Chief Executive Officer, Director
Yeah. So we did better than expected through the rebalancing, but it's not over yet. There's still another phase that's going to happen in fiscal year '25. For us, actually, two more phases that we have to get through. But we've done really well. And in addition to that, we've actually picked up new sites as the client has grown. So, yeah, it just turned out better than we expected. But we're not calling it quite yet Tim. Just because we have to get through the next two phases this year. But we're optimistic because I think we've been really consistent with saying that this was more of a philosophical change, not a reflection on our performance. And as such, we've just been continuing to grow with the client as that client opens up new sites. So it's been a great story.
Tim Mulrooney - Analyst
Understood. That's good to hear. So not through it yet, but things are looking up. That's good color. Thanks Scott. And then just one more for me on the -- excuse me, the technical solutions business.
Could you just expand a little bit more on that $4 million remediation charge on the energy performance contract? I mean, does this happen from time to time or is it a rare occurrence? Is there a reasonable expectation for more of these types of charges in the future? Just the nature of the business or is this more commercial (multiple speakers)
Scott Salmirs - President, Chief Executive Officer, Director
Just rarely happens, Tim. Rarely happens. This is an anomaly. I'll let or I'll take you through it. But this is something that we rarely ever see.
Earl Ellis - Chief Financial Officer, Executive Vice President
Yeah, this was a technical issue with one of a portion of an installation. So this was actually part of a broader installation that actually started in 2018. So it was a $50 million project. Again, we actually had a fail on a portion of it. And as a result of that, we needed to remediate the customer. But as Scott mentioned, this is a very rare event.
Tim Mulrooney - Analyst
Understood. Thank you so much.
Operator
Andy Whitman, Baird.
Andy Whitman - Analyst
Oh, great, thanks -- excuse me. So I wanted to just ask another couple things just to help clarify the quarter a little bit. I think, Earl in the B&I segment, I think you said there was $4 million to $5 million of discrete costs in addition to some of the other things you talked about in the quarter. But I was kind of curious about the discrete cost. Are you meaning to say that those are one-time costs or somehow otherwise discrete, maybe some color on what that was and maybe help give some context around that. Thanks.
Earl Ellis - Chief Financial Officer, Executive Vice President
Yeah, thanks for the question, Andy. Those are kind of like what I would say were onetime discrete expenses, most notably, just a handful of legal settlements that we chewed up in the quarter as well as a bad debt reserve, where just a series of small things that actually came up to about $4 million, $5 million.
Andy Whitman - Analyst
Okay. And but those were added back in the adjusted results. Is that correct?
Earl Ellis - Chief Financial Officer, Executive Vice President
They were at -- no, those are actually in the above the line. Yeah. So those were not below the line numbers. Those were actually numbers that actually hit our SG&A above the line.
Andy Whitman - Analyst
Okay. Yeah, because sometimes you add back legal settlements. And so --
Earl Ellis - Chief Financial Officer, Executive Vice President
Yeah, again, typically those would be very large legal settlements that we'd actually put below the line. These were a series of smaller ones that would actually accrue for above the line.
Andy Whitman - Analyst
Okay. All right. And then I guess there was a comment here that the free cash flow in 2025 is going to be impacted by a $30 million to $40 million of -- I don't know what you call it, I guess maybe, transformation costs. So I was hoping maybe you could expand on that a little bit. Because I think previously the ELEVATE program was looking for maybe a $25 million impact to fiscal '25. So it looks like it's a little bit bigger. So I was wondering if this is just like, this is the cost, the new cost estimate for the same or if you're doing more and if you're doing more what you're doing?
Earl Ellis - Chief Financial Officer, Executive Vice President
Yeah. I know this will be the new cost estimate for the same. If you recall originally, we had said that ELEVATE would be about $150 million to $180 million. We've actually since taken that up to about $205 million to $215 million. So what you're seeing actually reflects the higher cost and again, we've probably spent near 80% of that total. So what you're actually seeing is literally the residual wind down over the next 18 to 24 months.
Andy Whitman - Analyst
Okay. That's helpful. And then maybe Scott, just for you in the 20 basis points of margin expansion that you're anticipating for 2025, are there other investments that are going in that holding that one back? Or do you feel like with the top line growth that you're getting and the leverage that you get out of your platform, of your SG&A costs primarily, is that the right way to be thinking about in your expansion or do you feel as you finish up the remainder of ELEVATE that maybe annual margin expansion can expand beyond the 20 basis points that's implied for 2025?
Scott Salmirs - President, Chief Executive Officer, Director
Yeah, we do. We think it can expand. And if you remember, we put out a aspirational target of 7% on EBITDA margins and we do believe we're on a path to that. The ELEVATE spend, is largely behind us, but the benefit is just beginning, right. Because part 1 is getting your data platforms all updated and upgraded. But part 2 is then building the tools on top of that. So the people out in the field can get insights and solutioning. So that's just beginning and we've gotten a fair number of benefits already, but there's more to come.
Andy Whitman - Analyst
Okay, great. Those are all my questions for today. Have a happy holidays, guys.
Scott Salmirs - President, Chief Executive Officer, Director
You too, Andy.
Operator
Josh Bibb, Truist Securities.
Jasper Bibb - Analyst
Hey, good morning guys, actually, Jasper Bibb on. And then prepared remarks you mentioned expecting total revenue to grow in fiscal '25. Just kind of hoping you could put a finer point on what that might look like from a growth rate perspective and cadence through the year with some of the factors you decided that sound like overall, it's going to be a stronger back half than the first half, but just a little bit more detail there would be great.
Scott Salmirs - President, Chief Executive Officer, Director
Yeah, I mean, look, we're optimistic that it is going to be a growth year. When you look at our end markets, we're just seeing great white space. I think the one that is still in question is B&I, right, in terms of when we'll see that inflection back to growth.
But all signs are pointing positive. And you probably heard in my prepared remarks I talked about hoping that the back half of the year is when we start turning to growth, which will be a big deal for us, right? Because that's always a segment that grows at GDP.
And the fact that we were down 1%, that's a meaningful impact versus GDP, which could be 2% to 3% in that range. So we're hoping that's an upward trajectory. And then M&D is going to be a flattish story this year. But the hope is to return back to year over year growth in Q4, but really meaningfully in '26.
So aviation is going to be strong. We had double digit growth in 2024. I think we're going to have very solid growth in '25. Educational, it will keep being that steady grower. And ATS, I'm very confident ATS is going to have double digit growth again in '25. So really optimistic about the growth platform.
And I would cap it off by saying we achieved $1.7 billion in new sales in 2024. I think it's our sixth or seventh year of consecutive record breaking sales. So really excited about the platform from a growth trajectory.
Jasper Bibb - Analyst
Got it. And then I was hoping you could update us on what the ERP road map looks like for fiscal '25. When will the remaining segments be moving on to the new platform, and any expectations for associated cost savings there in year as part of your ELEVATE targets?
Earl Ellis - Chief Financial Officer, Executive Vice President
Yeah. No, thanks for the question. So we actually just deployed the new system for our largest industry group B&I as well as M&D. So we now actually have three of the IGs wrapped up. And so we anticipate the next ones will roll out over the course of the next 12 to 18 months. And as a result of that, we should have everything kind of like in place, I would say by the beginning to middle part of FY26.
Jasper Bibb - Analyst
Got you. Last one for me, just hoping you could outline what you're seeing on the labor cost, inflation, and recovery rate at this point, relative to I guess what's considered historical norms?
Scott Salmirs - President, Chief Executive Officer, Director
Yeah, I think labor costs have moderated. We -- I think we've been consistent in talking about that through '24, definitely 100 basis points or so step down from where we were in '23. And the positive thing for us is if you remember half of our revenues come from collective bargaining agreements on union arrangements.
And virtually all of those agreements were settled in the last 12 to 18 months. So we have really high predictability on labor costs in '25 and beyond, actually '25 through '27. And it's all at rates that we believe are recoverable from clients (inaudible) lot of irritation, not necessarily where we were in '21 and '22 when we had high labor inflation. So we feel like we're in a really good place from a labor inflation standpoint.
Jasper Bibb - Analyst
Okay, great. Thank you for taking the question.
Scott Salmirs - President, Chief Executive Officer, Director
Thanks.
Operator
Josh Chan, UBS.
Josh Chan - Analyst
Hi, good morning, Scott and Earl. Maybe picking off that on that labor inflation theme. Does productivity continue to be positive in 2025? And how much does that contribute to your 20 basis points of margin improvement? Is that one of the more meaningful driver you expect?
Scott Salmirs - President, Chief Executive Officer, Director
Yeah, I mean, look, I think one of the tailwinds we have is our ELEVATE investments on our workforce productivity optimization tool, which is just starting to roll out. And we're starting to see good benefit on that because for us, right, the vast majority of our expenses are all labor, right?
So the more proficient we get at that, the more we get to accelerate. So when you see us moving up the chain on EBITDA margin, it's largely going to come from being efficient on labor. And we just -- it's going to take another 12 to 24 months to completely roll out those tools, but really optimistic about what we're seeing.
Josh Chan - Analyst
Great. Thank you. And on ATS, the margins have -- they've been very, very different quarter to quarter this whole year. And so I know that you're ramping up of a big product, you got an acquisition in there. So could you just talk to maybe what the normalized or expected margin trajectory within ATS is going to 2025? Thank you.
Earl Ellis - Chief Financial Officer, Executive Vice President
Yeah, ATS margins are actually, the volatility that you actually mentioned are usually driven by mix of business, obviously with the micro grids probably have more of a higher margin, and as you've actually seen that business really pick up. But I would say that, if you were to look at normalized margins going out, you'd be looking at high single digit margins.
Josh Chan - Analyst
Great. Thank you. Thank you both for the color, and good luck on the next year.
Scott Salmirs - President, Chief Executive Officer, Director
Thank you.
Operator
Faizan Ali, Deutsche Bank.
Avi Sharma - Analyst
Good morning. This is Avi Sharma on behalf of Faizan Ali. Congrats on the quarter and thank you so much for taking our questions. I wanted to start on aviation. So aviation has seen obviously an outsized growth over the last several quarters. Could you talk about what is your market share, the market opportunity, and any thoughts around what is the sustainable growth rate for that business? Thanks.
Scott Salmirs - President, Chief Executive Officer, Director
Yeah, we feel really good about that business. And first of all, what we key on is the fact of how much infrastructure is going into airports around the country. And we're operating in the vast majority of the top 100 airports in the world, and so many of them are going through retrofits right now.
And for us, with our APS offering, which as you remember is our integrated offering, like we have at LaGuardia Airport, which is such an amazing contract, we feel really good about our trajectory. We grew double digit in '24, had a really strong sales year.
And if I were predicting, I'd say we'd be in high single digit growth in '25. The markets are going to moderate a little bit based on some of the predictions, but we have so much white space ahead of us in our offering.
And the last thing I'd mention, we have this one tool called ABM Clean, which is our app based tool that dispatches our employees around the airport based on predictability of where the traffic is going to be. And we've rolled that out to over 10 different airports at this point right now. So it's just beginning.
But I will mention, it definitely is a longer sales cycle in aviation just because we're going for larger contracts, bigger bundled solutions. So it takes a little bit longer. But again, really excited about the growth prospects long term for our aviation segment.
Avi Sharma - Analyst
Thanks. And then just on capital allocation, any updated thoughts around capital allocation priorities for 2025? And how should we think about split between organic investments, buybacks, and M&A?
Earl Ellis - Chief Financial Officer, Executive Vice President
Yeah, so no change in our approach and strategy around capital allocation. What we feel really pleased about is our continued relatively low leverage. We're right in our target range of 2.5 to 3 times, 2.6 times, which offers us the flexibility to continue to first and foremost, fund our dividend plan, you've actually saw a significant increase in the dividend plan. And when it comes to M&A, M&A will continue to be part of our strategic growth plan as well as opportunistic share buybacks.
Avi Sharma - Analyst
Good, thank you.
Scott Salmirs - President, Chief Executive Officer, Director
Thank you.
Operator
David Silver, CL King.
David Silver - Analyst
Yeah, hi, thank you. I guess I would just like to go back to the guidance -- adjusted EPS guidance range for fiscal '25. And in particular, I'm thinking about the low end of the range in particular. But you did record 2%, I guess, adjusted EPS growth this year in what was to me a very much less or cloudier or much more uncertain environment.
You've talked about some of the positive trends in virtually every one of your product lines. But other than maybe a bigger step down from your large distribution customer, I mean, what goes into your thinking about the potential for that low end of the range, maybe a 1% or 2% growth? I mean, what would have to happen to limit your earnings improvement to that low end of the range? Thanks.
Scott Salmirs - President, Chief Executive Officer, Director
Yeah, thanks for the question, David. I mean, I think so much of this rests on the commercial real estate trajectory, right? We are our prediction -- we are predicting some back end of the year growth, not heavy growth, but a little bit of growth.
And that can or cannot happen, that could put pressure on the range. And there's no question that the macro environment still isn't settled yet, because we have a new administration coming in. And this happens, frankly, every four years for us.
When a new administration comes in, they have potential policy changes. So we have to watch that carefully right now. So I think that's the stuff that could put pressure on us, but generally speaking, we're optimistic.
David Silver - Analyst
Okay. And then thank you for that. Then the next question is more kind of your philosophy or your growth philosophy with regards to labor. Heading into the pandemic, Scott, I believe your employee count was about 140,000 or more. I don't know what it is right this moment, but it was recently down around 125,000.
And I guess I'm just thinking, you have a number, you talked about white space and a lot of opportunities for growth, et cetera. Is this the case where you're going to be maybe targeting or upgrading your business mix primarily like seeking growth opportunities, and maybe moving some employees around, you talked a quarter ago about walking away or not renewing some contracts where the returns weren't acceptable.
Is this the case where maybe you're going focus your existing workforce more or less on and upgrading your portfolio of business? Or is this more the white space you see is more capturing share broadly in the areas in which you operate?
So, where might your employee count go, excluding, I guess excluding M&A, but where do you see your employee count going? And what would be the philosophy for growing your employee roles meaningfully?
Scott Salmirs - President, Chief Executive Officer, Director
Yeah. So, look, I don't think we look at it in terms of employee count, absolute employee count because obviously it's always relative to our revenue and our growth. But I would tell you, I'll give you two commentaries, David.
One, the more and more we do on the technical hard services side, like technical solutions and engineering, you have less people per revenue dollar. So you'll see the kind of mix of employees come down per revenue dollar for the entire organization as we move more towards hard services, if in fact, that's what ends up happening with the portfolio.
And then secondly, with our workforce optimization, the more and more efficient we get at managing labor, the less bodies per revenue dollar is the reality. So I would say -- I'm not sure it's going to be overly meaningful until we get more proof points or at least I don't want to commit to it being overly meaningful until we get more proof points.
But net net, five years from now, the ratio of employees to revenue dollars should moderate based on the fact that we're going to get more efficient, and we're going to move more towards hard services.
Operator
Mark Riddick, Sidoti Company.
Mark Riddick - Analyst
Hey, good morning.
Scott Salmirs - President, Chief Executive Officer, Director
Morning.
Mark Riddick - Analyst
So I was wondering if you could talk a little bit about on the -- in your prepared remarks, you talked about AI benefits. Maybe you could expand on that a little bit, maybe where you're seeing those initially whether it's in particular segment wise, and then sort of how you see those benefits being more broad based, maybe through other segments, or how you see that helping them drive toward the margin goals?
Scott Salmirs - President, Chief Executive Officer, Director
Yeah, it's -- well, look, I think it's early days, right? And I think for every company that we've spoken to in just about every industry segment, everyone would say it's early days, and it's less about true savings versus efficiency in the back office, and maybe solutioning out in the field.
So one good example is our ABM Clean AI based app tool, which again will deploy people more efficiently around an airport, and that lets us reduce labor, and actually get to problems quicker. We didn't have that solution two years ago. We weren't able to predict the way we can today.
So that's like one application, and we're going to be using AI more and more in the field for predictability on labor efficiency. And one of the things we've talked about in the past Mark, is that we may have an office building, 500,000 square foot office building in Chicago that has a certain labor ratio, and we'll look at one in Los Angeles, that's the same size and the same makeup and has a different labor ratio, and we'll get people on the phone and start talking about what are the differences in that and predictability.
So we wouldn't be able to do those kinds of predictions without it. And then on the back office, we generate a significant portion of RFP responses. And we believe there's an opportunity through AI to be more efficient with RFP responses, to be better at it.
And then the last thing I'll just say, on our HR platform, think about the tens and tens of thousands of people that we hire on an annual basis over the next coming years. It's not a one year journey, but over the next coming group of years, we're going to be able to through AI have greater predictability about candidates that come through the door and whether or not they're the type of candidate that will stay in the job, the predictability of that and helping with turnover is going to be phenomenal.
And we're not quite there yet, but we're already exploring AI opportunities in the HR space that I think are going to give us great trajectory.
Mark Riddick - Analyst
Okay. Great. And then the last thing for me, I want to circle back on this part. I think you touched briefly on thoughts on cash usage. I wanted to just sort of follow up and maybe get your thoughts on what you're seeing currently as far as the potential for acquisition pipeline, if you're seeing much in the way of changes in the number of opportunities that are out there, willingness of sellers to act, whether you've seen much of in the as far as attractive targets now maybe six months ago or so?
Scott Salmirs - President, Chief Executive Officer, Director
Yeah, I think we're seeing a little bit more flow, to be honest, just a little bit. But if you remember high level Mark, we kind of said we were going to be taking a pause on large acquisitions in '23 and '24 because of the fact that our ELEVATE program was in the middle of being formulated, and we were igniting our ERP system.
So we like to believe that there's more opportunity in 2025. The bankers that talk to are all talking about the potential for increased activity. So we'll see. But nicely for us, we're passing the hurdle point where we could start talking about acquisitions again at scale. We just need to spend a little bit more time getting through our ERP transformation, before we get super excited about a big acquisition.
Operator
Thank you. At this time, we have reached the end of our question-and-answer session, and I'll hand the floor back to Scott Salmirs for closing remarks.
Scott Salmirs - President, Chief Executive Officer, Director
I just want to quickly thank everybody for the interest for being on the call and taking our questions and answers. And just want to wish everybody a happy holiday season. Hope you have time with your family and just be safe out there and enjoy. And we'll be back to you in Q1 with our results, but we're really excited about 2025 here at ABM. So take care everybody.
Operator
Thank you. This does conclude today's teleconference. We thank you for your participation. You may now disconnect your lines at this time.