Yahoo Finance

These forward-looking statements involve a number of risks and uncertainties, some of which are beyond our control that could cause actual results to differ materially and you should not rely on them as predictions of future events. A10 disclaims any obligation to update information contained in these forward-looking statements whether as a result of new information, future events, or otherwise. For a more detailed description of these risks and uncertainties, please refer to our most recent 10-Q and 10-K.

Please note that with the exception of revenue, financial measures discussed today are on a non-GAAP basis and have been adjusted to exclude certain charges. The non-GAAP financial measures are not intended to be considered in isolation or as a substitute for results prepared in accordance with GAAP, and may be different from non-GAAP financial measures presented by other companies. A reconciliation between GAAP and non-GAAP measures can be found in the press release issued today and on the trended quarterly financial statements posted on the Company's website.

We will provide our current expectations for the first quarter of 2019, as well as our long-term model, on a non-GAAP basis. However, we are unable to make available a reconciliation of non-GAAP guidance measures to corresponding GAAP measures on a forward-looking basis due to high variability and low visibility with respect to the charges, which are executed from these -- which are excluded from these non-GAAP measures.

Now, I would like to turn the call over to Lee Chen, Founder and CEO of A10 Networks.

Lee Chen -- Chairman, Chief Executive Officer, President and Director

Thank you, Maria and thank you all for joining us to discuss our fourth quarter and year 2018 results. We delivered a solid quarter and are pleased with our continued momentum in security, 5G and multi-cloud. Revenue increased 11% year-over-year to $61.8 million, and we maintained a healthy non-GAAP gross margin of 78.2%, and generated non-GAAP EPS of $0.05.

We have been investing in security and believe we are building momentum in the market with our highly scalable and intelligent automation driven software-based security solutions. We believe our performance, scalability and software-based solutions position us to grow in the hyper-scale converged security, 5G and multi-cloud world.

In the quarter, we delivered a strong quarter for our security solutions, which included some nice wins for our CFW and SSLi offerings.

For the year, our security product revenue grew 36% year-over-year to reach 38% of product revenue as customers continue to focus on security. Our holistic approach has resonated with our customers, and we remain committed to innovating and bringing new solutions to market.

In TPS, we recently released a new version of software to include dynamic pattern recognition, enhanced detection analytic engine, intrusion prevention system, and support a new 220G high-end appliance. A10 continues to deliver on its mission of intelligent automation to reduce costs for our customers and we believe our solution stands out among the competition. We also enhanced our analytics and management software for TPS and CFW, and introduced a new multi-cloud secure service mesh solution for applications deployed in open-source Kubernetes container environments.

This solution provides teams deploying micro-services applications with an easy, automated way to integrate enterprise-grade security and load-balancing with comprehensive application visibility and analytics. We believe these new solutions demonstrate our commitment to helping customers navigate the evolving multi-cloud threat landscape efficiently and affordably.

5G is an exciting market opportunity for our security solutions. We believe our stronghold in the service provider segment and the high-performance and scalability of our solutions position us extremely well to meet the evolving security and performance needs of our 5G customers. Building upon our technology strengths, we have developed a robust suite of solutions to help mobile carriers meet the significant capacity, performance and security demands in the age of 5G. Our Thunder CFW, with integrated carrier firewall, multi-vector DDoS protection, Carrier Grade NAT, application visibility and traffic steering capabilities, is a great example of our product advances in this space. This differentiated high-performance solution provides a consolidated and secure 5G solution for an effective defense against attacks.

We have been hard at work innovating across our entire product portfolio and our early bets on 5G have been paying off. We secured three additional 5G security wins, which build on the two we announced in the third quarter. These five operators are deploying A10's 5G Gi-LAN solution in a variety of form factors, and plan to launch their first commercial 5G services in the first half of 2019. A10 has a long and successful relationship with these operators and we believe our design wins demonstrate our ability to gain share in this large and growing opportunity.

As 5G adoption is still early, and related standards continue to evolve, we anticipate operators will experience a new set of challenges. Network architectures will require a full spectrum of physical, virtual, and containerized offerings that can handle multi-terabit scale with reliability, high agility and automated security.

Additionally, big data and cutting-edge predictive analytics through AI and machine learning will emerge as key priorities in order to cope with the exploding scale of new security threats, such as IoT attacks. A10's strength in high performance, rich carrier security offerings and network visibility position us well for 5G. Our Harmony Controller provides the necessary visibility and keeps the operator informed and in control of their networks. As a result, network operators will be able to scale and protect their network in real-time, and manage it from a single pane of glass.

We have partnered with key technology providers to develop a product roadmap that will expand the capabilities of our 5G solutions to further propel our point position in this large and growing opportunity.

In the fourth quarter, we expanded our partnership with NEC to now include the integration of A10's CFW solution into NEC's 5G SDN/NFV orchestration infrastructure. NEC was looking for a partner who could seamlessly consolidate security and application layer networking into NEC's innovative mobile and fixed network solution offering. This partnership will help provide service providers with continuous protection from security challenges and help them to achieve the scale needed to rapidly commercialize their 5G services.

I'm also excited to announce that we have partnered with Microsoft Azure to provide our cloud-native ADC solution, including our Harmony Controller vThunderADC and Lightning ADC on the Microsoft Azure Marketplace. The flexibility and convenience of multi-cloud comes with its challenges, and our Harmony Controller solution, with its prescriptive data analysis and machine learning helps alleviate these issues.

Harmony Controller is one of our growing number of products offered on a subscription basis and is driving more software subscription revenue. We believe this is a unique offering in the market today and is a large part of the discussion with our customers. Harmony Controller is also gaining industry recognition as it was recently named a finalist in the 2018 CRN Tech Innovator Awards and took top honors in the Business Intelligence and Analytics category. We are very excited about the market's response to the many significant advancements we have made to our solutions.

I would now like to spend a moment on our sales transformation, which was a major priority for us in 2018. We made good progress during the quarter. We improved sales productivity by 7% year-over-year and were pleased to see double-digit product revenue growth in North America, Japan, APAC and Latin America.

We are also encouraged to see our pipeline of security opportunities increase 31% year-over-year. While it is still early in our sales transformation, we are pleased with the early results and believe we are on the right path. As we enter the new year, we have several changes taking effect to help further incentivize the sales team to drive new product sales with both new and existing accounts. We are also expanding our go-to-market technical leadership with the recent appointment of Ravi Raj Bhat as Senior Vice President and Global Field Sales, CTO.

Ravi joins A10 from Ericsson where he was Vice President of Engineering. We believe his extensive service provider expertise will be instrumental in helping A10 capture share in 5G and expand our global alliances. We just wrapped up our annual Sales Kick off and I have to tell you that the energy level and enthusiasm was dynamic. Our partners, our product teams, our field personnel, and all of us at A10, are energized.

Together, we will build on this momentum. We have a very clear vision, a line of sight to what we will accomplish and our salesforce is eager to monetize the Company's growth opportunities in security, 5G and multi-cloud.

We have subscription only platforms set to grow, we have innovative products set to arrive and all this is being led by new sales leaders eager to win. With clarity of vision and focus on execution, we are excited about what we can achieve this year and beyond.

We are building a strong funnel of opportunities for our security, 5G and multi-cloud solutions. Our win rate remains high and in total we added 162 new customers in the quarter. Let me share with you some of the recent customer engagements.

A multinational retailer based in the US looking to redesign their perimeter of its network and replace the incumbent's proxy solution has standardized on A10's Thunder SSLi solution globally.

This A10 customer will deploy Thunder SSLi to decrypt outbound traffic and provide visibility and control over traffic management. This win is an expansion of a new logo that we won earlier in 2018, and we are pleased with our continued traction with this customer.

A federal executive department replaced an incumbent solution with A10's Thunder SSLi solution and Harmony controller to reduce the load on its existing firewall assets and provide a single decryption architecture. The key to winning this new customer was A10's superior SSLi performance, analytics and engineering support.

Alongside our partner, Ericsson, we secured a new service provider customer in Latin America. This customer will deploy our CGN solution in Brazil, Colombia and Argentina as part of its virtual evolved packet core. A10 provided the most affordable and comprehensive set of features, which were key selling points for this customer. Moreover, the customer saw immense value in our partnership and integrated offerings with Ericsson.

Looking into 2019, our top priorities for the year will be to drive growth in security, 5G and Multi-Cloud. In security, we expect to build on the momentum we have generated with our Thunder CFW solution and further drive sales for our Thunder TPS and SSLi solutions.

Our goal is to grow security product revenue to be 40% to 45% of product revenue for 2019. In 5G, we look to add to our strong early wins, further leveraging our strong base of existing mobile providers. We have a unique value proposition with Harmony Controller and it's resonating in the market. The launch of our multi-cloud ACOS 4.1.4 Gold Release will enable our customers to deploy Harmony Controller across their A10 solutions, providing them the full benefits of dynamic visibility, prescriptive data analysis and machine learning. Along the way we will increase our subscription revenue, fine tune our marketing engine and further improve our productivity.

In summary, we are excited about the momentum we are building in the market and the results we are seeing from our sales transformation efforts. We provide our customers and partners a differentiated values that we believe sets us apart. We have a clear strategy and believe we are well-positioned to maximize our opportunities in the fast-growing areas of security, 5G and multi-cloud.

With that, I'd like to turn the call over to Tom to review the details of our fourth quarter financial performance and first quarter guidance. Tom?

Tom Constantino -- Executive Vice President, Chief Financial Officer

Thank you Lee. Fourth quarter revenue increased 11% year-over-year to $61.8 million, compared with $55.5 million in the same period last year. For the year, we generated revenue of $232.2 million, compared with $235.4 million in 2017.

Fourth quarter product revenue increased 18% year-over-year to $39 million, bringing our total product revenue for the year to $144.7 million, or 62% of total revenue.

Security product revenue grew 36% over last year and contributed to 38% of total product revenue in 2018. Service revenue for the year was $87.5 million, or 38% of total revenue.

Moving to our revenue from a geographic standpoint, for the fourth quarter revenue from U.S. -- United States increased 10% year-over-year to $25.7 million, compared with $23.4 million in the same period last year. In Japan, revenue was $16.2 million, an increase of 21% year-over-year.

Revenue from APAC, excluding Japan, was $9.5 million, up 25% year-over-year.

In EMEA, revenue was $7.6 million, compared with a record $9.3 million last year.

Revenue from LATAM in the quarter increased 57% year-over-year to $2.9 million, compared with $1.8 million last year.

We are changing the way we disclose our revenue by customer vertical in order to provide more transparency into our exposure to Web Giant and Cloud customer revenue, which was previously primarily accounted for in Enterprise revenue. We will now report three customer verticals Service Provider, Enterprise and Web Giant.

Service provider revenue in the quarter increased 28% year-over-year to $28.1 million, or 45% of revenue. For the year, Service Provider revenue was $99.5 million, or 43% of revenue.

Enterprise revenue in the quarter declined 11% year-over-year to reach $24.1 million, bringing our total Enterprise revenue to $91.1 million for the year, or 39% of revenue.

Our Web Giant revenue grew 46% percent year-over-year to $9.6 million in the quarter, and was $41.6 million for the year, or 18% of revenue.

As we move beyond revenue, all further metrics discussed on this call are on a non-GAAP basis, unless stated otherwise. We delivered fourth quarter total gross margin of 78.2%, and our total gross margin for the year was 78.3%, an increase of 40 basis points from last year.

Fourth quarter product gross margin was 76.8%, an increase of 140 basis points from Q4 of 2017. Our year-over-year improvement in product gross margin was driven by a higher mix of software and security revenue. Services gross margin in the quarter came in at 80.6%, compared to 84.5% in Q4 of 2017.

We ended the quarter with headcount of 860 compared with 875 at the end of last quarter. The decrease in headcount was primarily in international sales as our new sales leaders transform their teams in preparation for 2019.

Non-GAAP operating expenses in Q4 came in at $45.1 million, which is well-below our guidance, and was flat compared to the prior quarter.

Non-GAAP operating income was $3.3 million, compared with $2.5 million in the prior quarter. Non-GAAP net income for the quarter was $4.1 million, or $0.05 per diluted share, compared with $4.4 million, or 0.06 per diluted share in Q4 of last year.

Diluted shares used for computing non-GAAP EPS for the fourth quarter were approximately 75.7 million shares.

Moving to the balance sheet, average days sales outstanding were 80 days, up from 78 in the prior quarter. At December 31, 2018 we had $128.4 million in total cash and marketable securities, compared with $123.6 million at the end of September.

Before moving to our outlook for the first quarter, I would like to make a couple comments regarding our long-term model and path to achieve it. We will continue to focus on the growth areas of our market security, 5G and multi-cloud; further improvements in our go-to-market transformation and continued disciplined focus on expense control.

With these efforts, we expect to be able to deliver incremental operating margin each year and to progress to our target operating margin of 20% or greater within three to five years.

Moving on to our outlook for the first quarter. We currently expect first quarter revenue to be in the range of $49 million to $53 million.

We expect gross margin to be in the 77% to 79% range and operating expenses to be between $44 million and $45 million. We expect our non-GAAP bottom line results to be between a loss of $0.10 and a loss of $0.03 per share using a share count of approximately 74.5 million basic shares.

Operator, you can now open the call up for questions.

Questions and Answers:

Operator

We will now begin the question-and-answer session. (Operator Instructions) The first question will come from Mark Kelleher of D.A. Davidson. Please go ahead.

Mark Kelleher -- D.A. Davidson & Co. -- Analyst

Great, thanks for taking the questions. Could you just talk a little bit about that revenue guidance for Q1 that's calling for a pretty significant sequential drop down, how much of that is just typical seasonality? Are there any other factors that cause you to be a little conservative on that quarter?

Tom Constantino -- Executive Vice President, Chief Financial Officer

Hi, Mark, it's Tom. Thanks for the question. We typically see a seasonal decline from Q4 to Q1 and this is certainly within that range of what we would expect normal seasonality. I will call it is a modest increase from Q1 of last year. But yes, it's in the range of what we'd expect from seasonality.

Mark Kelleher -- D.A. Davidson & Co. -- Analyst

Right. So at the midpoint of that revenue guidance should be able to up 4% year-over-year?

Tom Constantino -- Executive Vice President, Chief Financial Officer

Yes.

Mark Kelleher -- D.A. Davidson & Co. -- Analyst

Yes. Okay. Thanks for the visibility on the breakout of revenue in the verticals. Just looking at that the -- looks like the Web Giant contribution tends to be all over the place. Is that -- there's can you tell us what type of visibility you have there? What products you're selling in there? Just some more, more around the Web Giant?

Tom Constantino -- Executive Vice President, Chief Financial Officer

Sure. And that certainly is a reflection of the lumpiness of that portion of our customer base, as you know, I'm sure would expect Mark, that has our largest customer in that category, which can be lumpy, but it just lumpy by nature of that category and then we do typically have decent visibility quarter-to-quarter and it's a little hard to get out beyond one quarter with some of that, but we're always working on improving that.

Mark Kelleher -- D.A. Davidson & Co. -- Analyst

All right. And on the balance sheet, inventory popped up a little bit sequentially, is there anything going on there?

Tom Constantino -- Executive Vice President, Chief Financial Officer

Yes, just a little bit of buildup, its tied to the timing of some of the commitments we have to make in our supply chain, you know that should naturally come down a little bit -- just a little bit unusually high right now. But that's not an indication of a continued trend that I would expect.

Mark Kelleher -- D.A. Davidson & Co. -- Analyst

Okay. And the five security wins that you have -- for 5G installations. What's the ramp look like behind that?

Lee Chen -- Chairman, Chief Executive Officer, President and Director

So, the Layer companies to launch Layer service in the first half of 2019. So although 5G is our win, we did shift some of the equipment, including both the hardware and software solutions to these providers and they are in the lab environment today. So they plan to launch by first half of 2019.

Mark Kelleher -- D.A. Davidson & Co. -- Analyst

So, a bigger ramp on that product in the back half of the year?

Lee Chen -- Chairman, Chief Executive Officer, President and Director

Now, we believe the opportunity are large and growing. We will also be multiple years between now and 2025 based on the IHS and internal study, the market which drives you to reach the goal of 50% over the next several years.

Chris White -- Executive Vice President of Worldwide Sales

Yes, Mark, this is Chris. Just to add a comment to that. In Q4, one of those design wins was out of EMEA. And so we expanded from just kind of Asia-Pac and Japan market into EMEA as well and we're starting to see opportunities in the pipeline in North America as well. But as we have stated it's while we're going to see growth this year in that market. We're going to see accelerated growth as we get into 2020 and through 2025.

Lee Chen -- Chairman, Chief Executive Officer, President and Director

And also the -- we are engaging with many service provider around the globe. So we expect to have multi (inaudible) this year.

Chris White -- Executive Vice President of Worldwide Sales

And, Mark, just to clarify, when we have a design win, those are productive within themselves in terms of having a live order in revenue, meaningful revenue and each one of those lays the foundation for add-on business that will grow. So that's just the first step and actually expansion that we would expect to play out over the horizon that we mentioned.

Mark Kelleher -- D.A. Davidson & Co. -- Analyst

Okay. Great. That's all I got. Thanks.

Operator

(Operator Instructions) The next question will come from Zack Turcotte of Dougherty. Please go ahead.

Zack Turcotte -- Dougherty & Company LLC -- Analyst

Hey guys, thanks. Zack Turcotte for Catharine Trebnick. First, just one on OpEx. Do you expect any sort of near term rent and OpEx maybe related to the build-out for 5G or I saw your long term operating margin guide 20% in 3-5 years is pretty aggressive. I would be expecting more OpEx in near term or just continually getting more efficient?

Tom Constantino -- Executive Vice President, Chief Financial Officer

Yeah. Hey, Zack. Yes, we are actually focused on reducing OpEx this year. So we will not see a ramp up. Now, you might see quarter-to-quarter, some fluctuations and how that plays out, but for the year, we do expect OpEx to come down as we are getting more productive in sales and the sales productivity metrics that were called out by Lee on the call are representation of that. We had a trajectory there that we think is going to help us reduce our, our OpEx in '19, and if you look out into Q1, we expect we'll see just a little bit better efficiency and we think that'll play out continued throughout the year for us.

Zack Turcotte -- Dougherty & Company LLC -- Analyst

Okay. And then...

Lee Chen -- Chairman, Chief Executive Officer, President and Director

We have invest more in our strategic areas such as 5G security and multi-cloud. But overall, you look at the OpEx. We do not expect overall increase due to the investment in security call in 5G.

Zack Turcotte -- Dougherty & Company LLC -- Analyst

Okay. As I wonder on 5G as well. First, who are your primary competitors you are seeing for the 5G design wins? What are your win rates like for that?

Lee Chen -- Chairman, Chief Executive Officer, President and Director

In the 5G design win, we had is your typical suspect -- when you find the security company. For the net -- Juniper and in one case F5 and typically you will go through a POC. I would say in the first five cases, I think we won -- sorry, easily due to our scale performance and ability in our AI analytics.

Chris White -- Executive Vice President of Worldwide Sales

And Zack, this is Chris. Just to add to that to your win rate question. All right, as we've shared in the past, we've got very strong win rates holistically, but I would say they're even accelerated and higher in the 5G space because I believe we are ahead of the curve on that and improve that out through the POCs that Lee mentioned.

Zack Turcotte -- Dougherty & Company LLC -- Analyst

All right. It definitely seems to us, you were ahead of the curve and developing scalable 5G solution with integrated analytics and everything. So, you feel that in the next 12 months, 24 months, 36 months competition will kind of ramp up as your competitors continue to build out their solutions in the future sets?

Lee Chen -- Chairman, Chief Executive Officer, President and Director

You know the -- in technology where you always have to continue to innovate yourself, but we are comfortable with the position we are in, due to the investment in our -- just on yesterday, we have been investing analytics for the past five years, and we are very strong with our -- the carriers Firewall carrier security will continue to invest in the areas. We also have a close to 250 service provider globally deploy on the hyperscale in career grade net solutions.

So, we feel pretty good about it. Also the off solutions is differentiating in many ways. If you look at the 5G solution, one of the things the carriers and us, expect, anticipate, there will be a surge in the DDoS attack due to IoT, and we are one of the few vendor has really strong offering in DDoS protection. So, also reaching is really differentiated and I feel good about position. Of course, we need to continue to innovate.

Zack Turcotte -- Dougherty & Company LLC -- Analyst

All right. Great, thanks.

Operator

And this concludes today's question-and-answer session. I would now like to turn the conference back over to Lee Chen for any closing remarks.

Lee Chen -- Chairman, Chief Executive Officer, President and Director

Thank you. And all of our shareholders, for joining us today and for your support. Thank you and good day.

Operator

The conference is now concluded. Thank you for attending today's presentation. You may now disconnect your lines. Have a great day.

Duration: 35 minutes

Call participants:

Maria Riley -- Investor Relations

Lee Chen -- Chairman, Chief Executive Officer, President and Director

Tom Constantino -- Executive Vice President, Chief Financial Officer

Mark Kelleher -- D.A. Davidson & Co. -- Analyst

Chris White -- Executive Vice President of Worldwide Sales

Zack Turcotte -- Dougherty & Company LLC -- Analyst

More ATEN analysis

Transcript powered by AlphaStreet

This article is a transcript of this conference call produced for The Motley Fool. While we strive for our Foolish Best, there may be errors, omissions, or inaccuracies in this transcript. As with all our articles, The Motley Fool does not assume any responsibility for your use of this content, and we strongly encourage you to do your own research, including listening to the call yourself and reading the company's SEC filings. Please see our Terms and Conditions for additional details, including our Obligatory Capitalized Disclaimers of Liability.

More From The Motley Fool

• 10 Best Stocks to Buy Today

• 3 Stocks That Are Absurdly Cheap Right Now

• 5 Warren Buffett Principles to Remember in a Volatile Stock Market

• The $16,728 Social Security Bonus You Cannot Afford to Miss

• The Must-Read Trump Quote on Social Security

• 10 Reasons Why I'm Selling All of My Apple Stock

Motley Fool Transcribers has no position in any of the stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. The Motley Fool has a disclosure policy.