Ladies and gentlemen, thank you for standing by, and welcome to NETSCOUT's fourth quarter and full fiscal year 2022 financial results conference call. At this time, all parties are in a listen-only mode until the question and answer portion of the call. As a reminder, this call is being recorded. Anthony Piazza, Vice President of Corporate Finance, and his colleagues at NETSCOUT are on the line with us today. If you require operator assistance at any time, please press star zero. I would now like to turn the call over to Anthony Piazza to begin the company's prepared remarks.
Thank you, operator, and good morning, everyone. Welcome to NETSCOUT's fourth quarter and full fiscal year 2022 conference call for the period ended March 31, 2022. Joining me today are Anil Singhal, NETSCOUT's President and Chief Executive Officer, Michael Szabados, NETSCOUT's Chief Operating Officer, and Jean Bua, NETSCOUT's Executive Vice President and Chief Financial Officer. There is a slide presentation that accompanies our prepared remarks. You can advance the slides in the webcast viewer to follow our commentary. Both the slides and the prepared remarks can be accessed in multiple areas within the investor relations section of our website at www.netscout.com, including the IR landing page under Financial Results, the webcast itself, and under Financial Information on the Quarterly Results page. Moving on to slide number 3. Today's conference call will include forward-looking statements.
Examples of forward-looking statements include statements regarding our future financial performance or position, results of operations, business strategy, plans and objectives of management for future operations, and other statements that are not historical fact. You can identify forward-looking statements by their use of forward-looking words such as anticipate, believe, plan, will, should, expect, or other comparable terms. We caution listeners not to place undue reliance on any forward-looking statements included in this presentation, which speak only as of today's date. These forward-looking statements involve risks and uncertainties, and actual results could differ materially from the forward-looking statements due to known and unknown risks, uncertainties, assumptions, and other factors, which are described in this slide and in today's financial results press release, as well as in the company's annual report on Form 10-K for the year ended March 31, 2021, on file with the Securities and Exchange Commission.
NETSCOUT assumes no obligation to update any forward-looking information contained in this communication or with respect to the announcements described herein. Let's turn to slide number four, which involves non-GAAP metrics. While this slide presentation includes both GAAP and non-GAAP results, unless otherwise stated, financial information discussed on today's conference call will be on a non-GAAP basis only. The rationale for providing non-GAAP measures, along with the limitations of relying solely on those measures, is detailed on this slide and in today's press release. These measures should not be considered in isolation from or as a substitute for financial information prepared in accordance with GAAP. Reconciliations of all non-GAAP metrics with the applicable GAAP measures are provided in the appendix of the slide presentation, in today's earnings release, and on our website. I will now turn the call over to Anil for his prepared remarks. Anil?
Thank you, Tony, and good morning, everyone. Welcome and thank you all for joining us today. I am pleased to report that we met all our objectives for fiscal year 2022 and delivered a solid performance on multiple fronts. In line with our Visibility Without Borders strategy, we increased our existing customer business, forged new customer relationships, and advanced our cybersecurity agenda. These successes led to total revenue growth driven by high single-digit product revenue growth, continued margin expansion, improved diluted EPS performance, and strong free cash flow generation on a year-over-year basis. On behalf of NetScout, I would like to thank our employees, customers, and other stakeholders who contributed to our success in fiscal year 2022.
Let's now turn to slide number 6 for a brief recap and more detail on our fourth quarter and full fiscal year 2022 non-GAAP results. For the fourth quarter, revenue was $191.2 million and diluted earnings per share was $0.29, both exceeding our objectives for the quarter. For the full fiscal year 2022, we delivered $855.6 million in revenue. This represented total revenue growth of approximately 3% year-over-year. Our product revenue growth rate was over 8% year-over-year, more than double that of our total revenue growth rate during the same period. Notably, we ended fiscal year 2022 with a substantial backlog of approximately $50 million in unshipped orders.
This excludes approximately $60 million in radio frequency propagation modeling orders, which we expect to recognize as revenue in fiscal year 2023. Turning to margins, our gross margin was 77.4%, up 100 basis points year- over- year, while our operating margin was 21%, up 20 basis points year- over- year. Our enhanced margin profile diluted EPS of $1.84 in the fiscal year. This represented approximately 8% diluted EPS growth, more than twice that of our total annual revenue growth on a year-over-year basis. We generated strong free cash flow of more than $285 million in our fiscal year 2022. Let's now move to slide number seven for some further perspective on market and business insights.
Starting with our enterprise customer vertical, revenue grew more than 10% year-over-year for the full fiscal year 2022. Additionally, all key industry sectors in this vertical grew on an annual basis. These customers are increasingly focused on cybersecurity solutions and the acceleration of the digital transformation as they emerge from the pandemic and adjust to the new normal of today's operating environment. As a result, we continue to see spending momentum in this vertical. Michael will highlight some of the enterprise customer wins we achieved in the fourth quarter during his remarks. Moving to our service provider customer vertical, revenue declined approximately 4% year-over-year for the full fiscal year 2022. Carriers continue to be in the early stages of 5G deployment, as evidenced by the amount of radio frequency propagation modeling project orders we received during this fiscal year.
The majority of these projects are expected to be complete and recognized as revenue in fiscal year 2023. Michael will comment on some of the service provider wins during his remarks. Now let's move to slide number eight to review our outlook. As we look forward, we are excited about our core service assurance DDoS security business, as well as the new opportunity we see with the network detection and response areas of the cybersecurity market. Our Omnis solutions offer a uniquely differentiated approach compared to today's more traditional solutions, providing faster detection, investigation, and mitigation at larger scale than most current alternatives. As we continue to expand our cybersecurity market footprint in fiscal year 2023, we also plan to disclose more information related to our cybersecurity business, including business size and revenue growth rates.
Our cybersecurity business is comprised of our current Arbor security business, along with our new Omnis Cyber Intelligence. As a baseline, in our first fiscal year, 2022, our cybersecurity business generated revenue of approximately $250 million and delivered mid-single-digit revenue growth year-over-year. Moving to our current outlook for fiscal year 2023, we anticipate delivering higher revenue growth than last fiscal year, with the expectation for revenue to be in the range of $895 million-$925 million. This represents a year-over-year revenue growth rate in mid-to-high single digits. We expect our revenue expansion to be driven by a product revenue growth rate anticipated into the mid-single-digit to mid-teens range.
Regarding profitability, we anticipate diluted earnings per share will be in the range of $1.97-$2.03. This represents a mid-to-high single-digit diluted EPS year-over-year growth rate. We are providing this outlook despite various cost headwinds which are related to increased costs associated with travel and events as we return to in-person business operations, as well as the macro headwinds driven by the competitive labor market and elevated inflation. Our outlook also includes the estimated impact of a $150 million accelerated share repurchase program and a $150 million debt repayment, both of which we plan to execute in the first quarter of our fiscal year 2023. Jean will provide additional color and recap on the numbers in her remarks.
Finally, given that our current 25 million share repurchase authorization is approaching completion, our board recently authorized a new share repurchase program to allow for the repurchase of an additional 25 million shares of our common stock with no definitive time frame for execution. In summary, we are very pleased with our fiscal year 2022 performance and excited about the opportunities we see for NETSCOUT in fiscal year 2023 and beyond. We are entering the new fiscal year with a solid foundation from which to continue growing and remain well positioned to help our customers address the challenges and opportunities of the digital world. We look forward to sharing our progress and achievements with you as the new fiscal year unfolds. With that, I'll turn the call over to Michael.
Thanks, Anil, and good morning, everyone. Slide 10 outlines the areas that I will be covering today, starting with customer wins. In our enterprise customer vertical, we won a mid-seven-figure deal in the fourth quarter with a large global healthcare customer. This customer was focused on enhancing its infrastructure to gain even greater visibility and avoid disruptions as it prepares for the dramatic increase in business that it expects to occur following the pandemic. As part of this transaction, we provided a comprehensive solution combining our new Omnis cybersecurity and Smart Edge Monitoring product with our service assurance solutions. Separately, we won a high six-figure order from a large defense industry customer that had acquired a new division. After acquiring the division, this customer recognized the need for a stronger service assurance solution during the integration process.
Notably, this is the second integration project that we have completed for this customer, and we won this deal on the back of our strong performance on the initial project. This customer has more divisions to upgrade beyond these first two. Turning now to our service provider customer vertical. As mentioned earlier, we are still in the early innings of 5G, and during the fourth quarter, we received additional radio frequency propagation modeling orders from two tier one domestic carriers as they advanced their 5G network planning. The combined size of these orders was an eight-figure number in the mid-teens range, and we expect to recognize the revenue associated with these projects in our fiscal 2023 as the projects are completed.
We also received a mid-seven-figure 5G related order from a tier two domestic carrier in the fourth quarter as the carrier continued to roll out its 5G network. Now turning to our go-to-market activities, where we are starting to focus on in-person events again to further engage with existing and prospective customers. Just last week, we held our annual technology and user summit, Engage 2022 in Orlando, Florida. The theme of Engage this year was the Omnis wave of innovation, with a focus on demonstrating how our visibility platform and underlying deep packet inspection technology are being extended to edges and areas ranging from cybersecurity to adaptive DDoS, which incorporates our AIF intelligence feed, AIOps, 5G analytics, and more.
We experienced a strong customer and partner turnout, and it was wonderful to interact with many of our customers and partners in person again as we slowly move into the post-pandemic world. In addition to Engage, we recently came together with AWS to host a security immersion day focused on our Omnis Cyber Investigator integration with AWS Security Hub. This event was also well attended. Moving forward, we plan to attend the big 5G event in Austin, Texas, in mid-May. That concludes my prepared remarks, and I will now turn the call over to Jean . Thank you.
Thank you, Michael, and good morning, everyone. I will review key metrics for our fourth quarter and full fiscal year 2022, as well as comment on our fiscal year 2023 outlook. As a reminder, this review focuses on our non-GAAP results unless otherwise stated, and all reconciliations with our GAAP results appear in the presentation appendix. Regardless, I will note the nature of any such comparisons. Slide number 12 details the results for our fourth quarter and full fiscal year 2022. Focusing first on quarterly performance, as discussed on last quarterly earnings conference call, we experienced an acceleration of approximately $25-$30 million of orders in our third quarter that were previously expected in our fourth quarter. Accordingly, given our strong third quarter, fourth quarter revenue declined 10.4% year-over-year to $191.2 million.
We also ended the fourth quarter with a backlog of approximately $50 million of unshipped orders and including approximately $60 million of radio frequency propagation modeling orders, which is expected to be recognized as revenue in fiscal year 2023. Total backlog was more than $100 million. Our fourth quarter fiscal year 2022 gross profit margin was 77.6%, up 0.4 percentage points over the same quarter last year, primarily attributable to product mix. Our fourth quarter software-only revenue was 45% of our service assurance product revenue, compared to 34% in the same period in the prior fiscal year. Quarterly operating expenses increased 6.5% from the prior year, primarily attributable to increased travel and sales compensation costs.
We reported an operating profit margin of 12.4% compared with 22.4% in the same quarter last year. Diluted earnings per share was $0.29 compared with $0.49 in the same quarter last year. For the full fiscal year 2022, revenue was $855.6 million, which was an increase of 2.9% over the prior year. Product revenue grew 8.6%, and service revenue declined 1.8% over the prior year. Gross profit margin was 77.4%, an increase of one percentage point over the prior year. Software-only sales were 39% of service assurance product revenue in the full fiscal year versus 33% last fiscal year, resulting in higher margins overall.
Annual operating expenses increased 4.2% from the prior year, primarily due to investments in sales and marketing. We reported an operating profit margin of 21.0%, up 0.2 percentage points over the prior fiscal year, with diluted earnings per share of $1.84, an 8.2% increase compared with the same period in the prior year. Turning to slide 13, I'd now like to review key revenue trends. For fiscal year 2022, our enterprise customer vertical revenue grew 10.6%, while our service provider customer vertical revenue declined 4%, both on a year-over-year basis.
Approximately 51% of total revenue was generated from the enterprise customer vertical, while the remaining 49% was from the service provider customer vertical. Turning to slide 14, which shows our geographic revenue mix on a GAAP basis, revenue by geography continues to be domestically weighted. Both domestic and international revenue increased on a year-to-date basis. No customers represented 10% or more of total revenue in either the fourth quarter or the full fiscal year. Slide 15 details our balance sheet highlights and free cash flow. We ended the quarter with $703.2 million in cash equivalents, and short-term and long-term marketable securities, representing an increase of $149.7 million since the end of the third quarter.
Free cash flow generated in the quarter was $152.2 million, while free cash flow generated for the full fiscal year was $285.6 million. Our strong free cash flow was partially attributable to the timing of orders in the second half of the fiscal year, as well as an increase in multi-year maintenance renewals and customer prepayments. From a debt perspective, we ended the fiscal year with $350 million outstanding on our $800 million revolving credit facility, which expires in July 2026. To briefly recap other balance sheet highlights, accounts receivable net was $148.2 million, down by $85.6 million since the end of December.
The DSO metric was 64 days versus 75 days at the end of the fiscal year 2021, and 76 days at the end of December 2021. Let's move to slide 16 for commentary on our outlook. I will focus my review on our non-GAAP outlook. As Anil mentioned, we plan to initiate two capital structure activities in our first quarter of fiscal year 2023. First is a $150 million accelerated share repurchase program. We anticipate this will be completed in the fall and will consume the majority of the 5.8 million shares remaining in our existing 25 million share repurchase program authorization. Given this, our board recently authorized a new share repurchase program to allow for the repurchase of an additional 25 million shares of our common stock with no definitive time frame for execution.
Second is the debt repayment for up to $150 million of the outstanding debt on our revolving credit facility, which when completed, should bring the outstanding balance down to $200 million. Both of these transactions will be funded from our cash balance. For our fiscal year 2023 outlook, after taking these capital structure transactions into consideration, we anticipate revenue in the range of $895 million-$925 million, which implies a mid to high single digit year-over-year growth rate. Additionally, for the first half of the fiscal year, we anticipate delivering revenue in the range of 46%-48% of our full year revenue outlook.
At this time, if you would like to ask a question, please press star one on your telephone keypad.
If you wish to remove yourself from the queue, press the pound key. We do ask in the interest of time that you limit yourself to one question and one follow-up. We'll take our first question from Matthew Hedberg from RBC Capital Markets.
Yeah. Thank you. It's actually Matthew Swanson, on for Matt. Jean, it was great to see the acceleration in the FY23 guidance. Could you just maybe talk through some of the puts and takes of the current macro environment? It's obviously, you know, a complicated scenario that we're in right now as you kind of think through that acceleration and what's giving you the confidence in that.
Sure. From a revenue perspective, we had seen our software solution take advantage of some of the other supply chain related issues, and so we saw an acceleration in Q3 and Q4. As you can see from the backlog, we have over $100 million entering FY23. That gives us very good visibility to the first half of the year. We also believe that the Omnis product, the security products that we are entering the market that we're entering in the network detection and response area, has been very well received by our customers so far, and we have some sales of the Omnis cybersecurity product in fiscal year 2022, albeit immaterial.
We believe that will be a very good growth area for us in 2023 as salespeople come back to in-person sales and can do proofs of concepts and those types of things. When I think about the gross margin, we will have much more calibration in the gross margin in the revenue, which will affect the gross margin. As we've talked about in the past, a lot of the 5G radio frequency propagation modeling projects are still looking at, you know, where these carriers wanna put their antennas initially, so it's still very labor-intensive. I anticipate that the radio frequency propagation modeling of $60 million revenue will carry probably a 50% gross profit margin.
When I go down through operating costs, through the cost structure, I'd anticipate that there's about $45 million-$50 million of costs that are coming back into the cost structure due to travel, due to in-person events, general inflation, and then obviously the very competitive labor market that we're in. We have long-tenured employees, which are very loyal to NETSCOUT. As you know, we've never really done any kind of a volumetric layoff, so we still have all that talent in-house. When I go down through operating margin, the earnings per share from operations should increase probably in the mid-single digits%. We are doing those two capital structure activities. We have over $700 million worth of cash, which gives us over $300 million of excess cash.
Given how long it takes to execute the shares in the market, we're taking half of that free cash, excess cash and doing an accelerated share repurchase. Then, because of the rising interest rates and the fact that our debt instrument is a revolver, which means I can bring it up or bring it down, draw down the money whenever we need it, we're going to pay off that debt and then look in the future as to if any other debt capital allocations that's needed in the form of M&A or maybe a second share repurchase. When the operating leverage combined with those two financial transactions is giving the EPS the growth rate that we'll see in FY 2023.
Thank you. That was extremely helpful. As a follow-up, maybe for you know both Anil and Michael, building off what Jean was saying about the security business expectations in 2023. You know, it's fantastic that we're gonna get those additional metrics to give us some more visibility. Could you just talk a little bit more about what trends you're seeing right now and kinda like what's giving you that confidence for some further growth from that business in 2023?
I mean, we just introduced this just about three-four months ago. We already have 20 customers. The confidence is coming from the fact that we'll be really targeting our existing customers. In a way, we're building the second floor of the building. We already have the foundation and the first floor. The speed of traction is gonna be much better than would be normally with a brand-new solution. We are using a lot of the building blocks in the company, sales force, common engineering organization, common go-to-market model. Yes, we have some overlay people. That's giving us the confidence.
The second thing is we believe that the market we are addressing outside of DDoS, NDR, Network Detection and Response, is sort of underserved, and there's a big need in the market with several bigger player exiting the market for one reason or another. All these things, combined with what we have seen, the traction already, gives us good confidence that we'll have a higher growth rate in the cybersecurity business than our total growth rate next year.
We also had a very successful customer event last week and had a lot of conversations with our existing customers.
Yeah
the security partners. You know, we can use that to corroborate our earlier analysis that Anil mentioned. There's very strong sentiment from them.
All right. Thank you. Congrats again on the quarter.
Thank you.
Next question comes from James Fish from Piper Sandler.
Hey, guys. Congrats on a really good-looking quarter and good end to the fiscal year here. I did wanna-
Thank you.
Circle back on the guide, though. You know, it's been quite a few years since NETSCOUT was able to grow at this rate, and historically, we haven't had this amount of product backlog. It's nice to see that building with about a quarter's worth of product. You know, what can you say about what gives you confidence in hitting this type of growth rate given it's really a quarter's worth of product? Second, are you seeing carriers and large enterprises actually ordering earlier than anticipated given these supply chain woes?
Yeah. With, Jean covered some of these, James, but just to reiterate, yes, we had in Q3 a lot of such. I mean, there were multiple orders in multimillion-dollar range, both from service providers, couple of enterprise customers who accelerated their order because, well, we are one of the few software companies who can move bigger size orders because of the size of our deployment. In terms of our confidence, like I said, is coming from that we made a lot of investment in the last 18 months in introducing Omnis Security. Toward the end of the year, we'll be introducing something in the big data space. Most of it, or hardly any of this, as Jeane mentioned, is immaterial to the numbers of last year.
We'll see some growth rate from that, and as we just saw it in our recent user conference just maybe last week. A lot of customer interest, especially from existing customer, where they believe that we have really very compelling technology, yet the cost of ownership is much lower than the competitive solutions because they can use some of the hardware they have already purchased for almost nothing to run this new software.
There's another factor in the number of new customers in building growing faster and faster over the last several quarters. That gives us a lot of additional confidence in being able to grow.
That's helpful, Anil and Michael. Maybe just following up on what you just said, though. Really what I'm trying to understand is, you know, typically, how much visibility do you guys have without the supply chain, before all these supply chain issues, and what kind of visibility do you have today in terms of, like, timeline? Are we talking, you know, you have visibility of two, three quarters now instead of typically one quarter, or, you know, is that in the right magnitude?
Well, I think one of the things is we always have visibility into our renewal revenue, which is almost 50% of our total revenue, and we always had that. In addition to that, this year was an unusual event because of the backlog situation, material backlog situation, which Jean talked about. We have much better visibility than that which we ever had in the last four or five years. If you were with NETSCOUT before that, we had many such things between 2011 and 2016. I think that's. We're just getting used to this, but at the same time, we want to end, I mean, exit this year with similar visibility into the new year and into the next year.
Because of that, we will need some of the uptick in the security and other areas. Visibility is quite good, but I think I would say it's much, much better than we had it in the past.
Got it. Last one from me, if you don't mind. Free cash flow was really impressive this quarter, you know, $152 million. Jean, you mentioned the timing of orders and impact of multiyear maintenance renewals and prepayments, which, correct me if I'm wrong here, but I don't believe is typical, for NETSCOUT, and guessing it comes primarily from carriers in this case. Is there a way to think of how much this prepayment and multiyear trends kind of impacted free cash flow this year and what you expect for free cash flow conversion in fiscal 2023?
Free cash flow conversion, free cash flow is $285 million. The conversion was greater than 200%. I would estimate that there's between $40 million- $50 million in that free cash flow between an increase in multiyear renewals as well as the customer prepayment. When I look at FY 2023, I would anticipate that we will still have more than $200 million in free cash flow and that our conversion rate is probably going to be. I'm gonna hedge a little bit, so I'm gonna say 125% to about 145% of non-GAAP.
Congrats, guys.
net income.
Yep. Makes sense. Congrats, guys. Great quarter.
Thank you.
Thank you, Jim.
Thanks.
Our next question comes from Kevin Liu from K. Liu & Company.
Hi. Good morning, guys, and let me add my congrats on the quarter, NetScout as well. Just wanted to touch on, you know, more of the product backlog as well. You know, as you look at that product backlog coming into this year, would you expect to maintain that, you know, for at least maybe the first half or, even throughout the year, given the ongoing supply chain challenges, for your customers? Or do you expect that to work out, fairly quickly?
Well, our goal is to obviously maintain that, but it all depends on the timing of orders and next year and things like that. There was an unusual situation about unshipped orders and also the calibration projects take much longer to execute, and that created the situation. It's possible we get more calibration order next year, and we have a similar situation with more orders coming in towards the end of the year. Yes, goal is to continue to have much better visibility than in the past, which we had as we are vying for higher growth number, and numbers.
Understood. Just in terms of where you expect the growth to come from, in 2023, can you just talk a little bit about whether that's oriented more to security or whether you expect, you know, service assurance to ramp up as customers begin to move forward, more so with their 5G rollouts. Alongside that, you know, how does that impact kind of the split between the enterprise and service provider verticals that we should expect through the year?
Maybe I'll answer your last question first. I think it's going to stay in the 50/50 range. Long term, I look at enterprise 55% and service provider 45%, which was sort of opposite of what we had in the past, recent past or three or four years ago. The growth area we are looking at, 5G is going to replace a lot of the 4G revenue, and there could be some uptake because of more the MEC mobile edge computing. In the enterprise area, the growth has come from all the investment we made. Two big areas are we have announced a solution to deal with IT operation problems and triage for remote workforce. I feel that the need for what we do, performance management and service assurance, has become.
They've taken a new meaning as people are working from home or they have moved some of the operations to the cloud. We announced a product in the Smart Edge Monitoring area, which was very well received. The rest of the growth is going to come from the cybersecurity area where we announced multiple solutions, some which help our DDoS solution, which we call Adaptive DDoS. Another is a brand-new area called NDR, which we are looking at as Omnis Security. I think investors will be able to see how this is progressing as we plan to report for the first time more details on that part of the business.
That's great. Well, I appreciate you taking the questions and good luck here in 2023.
Thank you.
Thank you.
With that, if you have no further questions, I will now turn the program back over to Anthony Piazza.
That concludes our prepared remarks. Thank you very much for joining us today, and enjoy the rest of the day.
This does conclude today's program. Thank you for your participation.