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Operator
Good morning, and welcome to SiriusXM's First Quarter 2017 Earnings Results Call. Today's conference is being recorded. (Operator Instructions)
At this time, I would like to turn the call over to Mr. Hooper Stevens, Vice President of Investor Relations and Finance. Mr. Stevens, please go ahead, sir.
Hooper Stevens
Thank you, operator, and good morning, everyone. Welcome to SiriusXM's First Quarter 2017 Earnings Conference Call. Today, Jim Meyer, our Chief Executive Officer, will be joined by David Frear, our Senior Executive Vice President and Chief Financial Officer. At the conclusion of our prepared remarks, management will be glad to take your questions. Scott Greenstein, our President and Chief Content Officer, will also be available for the Q&A portion of the call.
First, I would like to remind everyone that certain statements made during the call might be forward-looking statements as the term is defined in the Private Securities Litigation Reform Act of 1995. These and all forward-looking statements are based on management's current beliefs and expectations and necessarily depend upon assumptions, data or methods that may be incorrect or imprecise. Such forward-looking statements are subject to risks and uncertainties that could cause actual results to differ materially. For more information about these risks and uncertainties, please view SiriusXM's SEC filings. We advise listeners not to rely unduly on forward-looking statements and disclaim any intent or obligation to update them.
As we begin, I would like to advise our listeners that today's results will include discussions about both actual results and adjusted results. All discussions of adjusted operating results exclude the effects of stock-based compensation.
I will now hand the call over to Jim Meyer.
James E. Meyer - CEO and Director
Good morning, and thank you for participating in today's call. SiriusXM turned in a very good first quarter, and I am confident we are on track to meet or beat all of our financial and subscriber guidance that we issued in January. Once again, we are demonstrating the scalability and strength of SiriusXM's unique business model and the robust consumer demand for our very special content bundle.
We grew revenue at approximately 8% in the first quarter to about $1.3 billion. We expanded adjusted EBITDA by about 14% to $502 million. This is the first time in the company's history that we've generated over $0.5 billion in adjusted EBITDA in a single quarter. And this quarter also marked our highest ever adjusted EBITDA margin at 38.7%, up 200 basis points from the same quarter last year.
Net self-pay subscriber additions were approximately 260,000, consistent with my expectations for the quarter. Paid promotional subscribers were roughly steady in the quarter on relatively flat auto sales. Churn rounded down to 1.8% and new car conversion was 40%, both very strong numbers and within the range you have seen in recent quarters.
We now have over 31.6 million paying subscribers, the highest level in the company's history. And as I mentioned, we feel very good about our full year guidance of roughly $5.3 billion in revenue, $2.025 billion of adjusted EBITDA, $1.5 billion of free cash flow and 1.3 million self-pay net additions.
SAAR in the first quarter was solid at 17.1 million and nearly flat year-over-year. Most feedback I'm hearing from the OEMs on the economy and auto sales is still broadly positive. Estimates for new car sales for the year remain in the low 17 million range, similar to the first quarter. Trucks and SUVs are flying out the door, but smaller cars are taking longer to sell. Our new car penetration rate was 75.9%, up from 74.3% in the first quarter of '16. Sales of SXM-enabled new cars climbed 1% in the first quarter to more than 3 million. The fleet of SXM-enabled vehicles climbed 14% year-over-year to 97 million, growing the pool of vehicles from which we can drive reactivations and used car additions.
As a percentage of all used car sales, we estimate about 34% so far this year have built-in SiriusXM, up from about 30% at this time last year. Our trial programs are now active at about 27,000 dealers, up from around 20,000 this time a year ago, with the bulk of the growth coming from independent dealers. Trial starts in the used car market are up 19% so far this year to a record 2.05 million, and we believe we are capturing a tad under 60% of vehicles turning over with dealer-based trials.
Service Lane is now active at more than 13,000 dealers, generating about 17 million data points in the first quarter alone. This helps us ensure our vehicle owner database is as accurate as possible, even as more vehicles turnover in the private market, which is naturally more challenging to track than dealer-based transactions.
In short, I'm thrilled with our continued and very successful efforts to build distribution in the subsequent owner market. We expect many years of subsequent owner additions as penetration here arcs over the next decade from the mid-30% up to the new car penetration rate in the mid-70s. This continues to be a strong growth opportunity for SiriusXM.
SiriusXM today is a hive of creativity, innovation and experimentation. Our biggest technical initiative remains the development and deployment of 360L as our next-generation two-way platform for connected vehicles. As I've said before, the vision is really quite simple, we want to provide a seamless, easy to access, easy to use listening experience, no matter wherever, whenever and however our subscribers want it. 360L will help secure our dominant in-car listening position, and we are excited by the opportunity to offer car buyers and our subscribers the enhanced functionality and content enabled by this exciting new platform. And we're even more eager to demonstrate how 360L can improve our marketing and CRM efforts, in particular removing friction and making it easier to convert and upsell our subscribers. We continue to expect initial deployments of 360L in select new vehicles in early 2018. So stay tuned.
And note, our continuously improving app is a key part of 360L. With better apps and support from additional connected devices, we also intend to drive expanded listening at home, at the office and on the go.
As I've said before, we are very committed to seizing opportunities that are developing in the connected vehicle space and investing in this area. Along those lines, I'm also pleased to announce the acquisition of Automatic's Labs -- Automatic Labs, which we acquired a few days ago.
San Francisco-based Automatic is a leader in connected vehicle data and analytics, and its connected car adapters provide a range of useful features, like diagnostic alerts, emergency services assistant, fuel monitoring, parking assistant, vehicle tracking and many, many more. What's great is that Automatic's technology will enable us to target the vast majority of cars on the road today that have no connectivity. We think Automatic is a great fit with SiriusXM and furthers our capabilities in connected vehicles as we open up new business opportunities in this space. We will continue to look for opportunities in this space, and we plan on giving you further updates about our connected vehicle initiatives and plans as we head into next year.
The competitive audio space requires us to remain at the top of our game, not just with new technologies, like 360L, but by also constantly reinforcing and improving the best bundle of compelling, timely and entertaining audio programming available anywhere. It is what our subscribers have come to expect from the leader in audio entertainment.
We are focusing on new voices, exclusive programming, easy access to the best live sports and special performances from world-class entertainers. Across our talk, sports, music and comedy programming, we continue to add unique personalities. Just this quarter alone, we launched shows with Brooke Shields, comedic TV star Jim Parsons and André Leon Talley of Vogue fame. In addition, late night star Craig Ferguson started a daily new show and debuted with a parade of star guests. We added a new series of shows from Stanford University and aired a stirring audio documentary about pioneering tech training programs for inmates called The Last Mile. Again, we hosted a special subscriber-only event that brought our audiences one-of-a-kind experiences, in person and on the air. Ed Sheeran performed at an exclusive subscriber event and broadcast just as the young star was setting industry records with the release of the new album. We provided subscribers the latest in EDM from our Music Lounge in South Beach, leading up to the Ultra Music Festival. And we broadcast interviews, reports and performances from this year's Coachella Music Festival.
We launched a new Las Vegas-based sports information network with broadcast legend Brent Musburger while continuing to give sports fans front row seats and easy access to the biggest sporting events, such as the Super Bowl, which we aired in 8 languages, every game of the NCAA college basketball tournament, all 4 rounds of the Masters and now, the start of the major league baseball season.
We reached a new long-term renewal with NASCAR, giving our listeners live access to every race through 2022 and bolster our coverage with a new show hosted by star NASCAR driver, Kevin Harvick.
The year is still young, but I feel very good about our progress so far. We are busy developing new platforms, searching for new and interesting content and continuing the day-to-day execution you've come to expect from our team. As I said, we are on track to meet or beat the initial guidance we have given you, and we continue to thoughtfully invest in our business, deploy our free cash flow to our shareholders and make selective and targeted acquisitions.
With that, I'll turn it over to David.
David J. Frear - CFO and Senior EVP
Thanks, Jim. Good morning, everyone, and thanks for taking the time today. The top of the funnel has never been stronger for us. Strong new car sales, strong penetration and rapid expansion of our used car dealer network delivered a trial funnel of nearly 9 million trials at quarter end. Total trial starts of 5.1 million in the quarter rose 8%, while used car trials starts rose 19% to a record of more than 2 million as our franchised dealer network grew to 17,700 participating dealers and the independent dealer network more than doubled to 9,300 participating dealers.
New car consumer conversion rates in the quarter stood at 40% an increase from 38% in the first quarter '16. Used car conversion rates held onto the 30% level despite fighting headwinds of an increasing mix of prior non-converters in an aging base of vehicles. Along with strong performance in fleet and rental conversions, we delivered a record first quarter for both OEM additions and self-pay additions.
Churn rounded down to 1.8% in the quarter as reductions in both non-pay and voluntary churn rates offset pressure from an increasing rate of vehicle-related churn.
In the first quarter of the year, we added 259,000 net new self-pay subscribers, which brought the self-pay subscriber base to over 26.2 million and total subscribers to 31.6 million. We feel confident in achieving our full year guidance for net self-pay subscriber additions of approximately 1.3 million.
Total revenue in the quarter was up 8% to approximately $1.3 billion on the strength of our subscriber additions as well as growth in ARPU. ARPU in the quarter was $12.95, growing more than 2% from $12.66 in the first quarter of '16. Advertising turned in yet another great performance with 14% growth. We feel extremely good about our revenue guidance of approximately $5.3 billion in '17.
Contribution margin in the quarter was 70.7%, up 40 basis points versus the first quarter of last year, with lower customer service and billing expenses from lower contact rates and lower agent rates, and cost of equipment as a percentage of revenue more than offsetting higher revenue share and royalty expenses.
SAC declined from Q1 '16 as higher installs from our 75.9% pen rate was more than offset by a reduction in SAC per install to $29. Fixed costs declined 50 basis points as a percent of revenue in the quarter.
Together, all of this produced record adjusted EBITDA of $502 million, up 14% over the prior year period, resulting in a record adjusted EBITDA margin of 38.7% in the quarter, a 200 basis point increase from the first quarter of '16. Based on the strength of this performance, we feel very comfortable reaching our full year 2017 adjusted EBITDA guidance of approximately $2.025 billion.
In the first quarter, free cash flow totaled $249 million, down 24% year-over-year as a result of payments from satellites, a pre-72 legal settlement and a shift in timing of automotive and interest payments compared to the first quarter of last year. Capital expenditures in the period totaled $53 million compared to $30 million in the first quarter of '16, and we remain confident in achieving our full year 2017 free cash flow guidance of approximately $1.5 billion.
The stock has performed well this year, opening the year at $4.49 and touching a high of $5.53 in March. In the first quarter, we spent approximately $300 million to repurchase 62 million shares and paid nearly $50 million in dividends to our stockholders.
Total debt now stands at approximately $6 billion with no maturities in the next 3 years, and leverage is 3.1x trailing adjusted EBITDA.
After nearly a year of deliberation, last night, the CRTC in Canada announced they had approved the recapitalization of SiriusXM Canada subject to certain conditions, which we anticipate meeting. We anticipate closing the recap in late May. Sirius will issue no more than 35 million shares in the recap, and the cash component will probably be less than USD 150 million, and we'll know all this as the Canadian shareholders make their various elections by the middle part of May.
We had $1.2 billion available under our revolver at the end of the quarter, and so we ended the quarter with ample liquidity to close the recap of Canada, the acquisition of Automatic Labs and continue investing in the business, pursuing strategic investments and returning capital to shareholders. And with that, operator, let's open it up for questions.
Operator
(Operator Instructions) And we will take our first question from Barton Crockett with FBR Capital.
Barton Evans Crockett - Analyst
One of the questions, I guess, was about the confidence that you have in your 1.3 million sub adds for this year. And it's just kind of basic question, but you added 259,000 self-pay in the first quarter. You multiply it by 4 and you're not hitting that 1.3 million number. So what is it that you see that drives better sub growth later in the year to give your confidence in hitting your target?
James E. Meyer - CEO and Director
So Barton, this is Jim. First of all, I mean obviously this is a number, you can imagine, we focus on daily, okay? When I say we're confident, I want to reiterate, we're confident in meeting or beating our guidance of 1.3 million. There are a lot of items that go into this, and I think that the timing of -- we're still learning the timing of how used car deactivations are going to hit and when. And as we go through those numbers and we look at our forecast out for the rest of the year, what I think is probably certainly, a consistent estimate for what we believe SAAR would be, all of it points to certainly being able to add 1.3 million. David, do you want to add something?
David J. Frear - CFO and Senior EVP
Barton, 259,000 is right on the button for what we expected in the quarter and -- on our path to 1.3 million. So for us, we are right on track.
Barton Evans Crockett - Analyst
Okay. I mean, seasonally would you expect that the second and third quarter specifically be much bigger than the first quarter?
David J. Frear - CFO and Senior EVP
So I think if you look back at the past, they generally have been. The first quarter's always been the low point. I don't think there's any year that you would take the first quarter, multiply it by 4 and get to the end of the year.
James E. Meyer - CEO and Director
Yes and I think, Barton, as you know, we've never given quarterly guidance on subs. But obviously, we pay close attention to what the quarters look like. And I think -- look, I think it's all I can add there.
Barton Evans Crockett - Analyst
Okay. All right. And then, to your acquisition, I know you guys are not giving a value for this, but I assume that it means that it skews toward the immaterial side in terms of what you spent. But I was wondering if you could talk about maybe what the impact is on your financial statements from their business such at it is, is it something we'll kind of notice or not? And a little bit more detail on how meaningful you think it could become over time?
David J. Frear - CFO and Senior EVP
So I think nothing about the acquisition of Automatic would cause us to change our guidance for the year for EBITDA revenue. It will -- what we spent on it will be in the Q. It's a little over $100 million to acquire it. And you know, look, as we get in there and in future calls, I think you can expect to hear us talk more about it. But as it relates to revenue and EBITDA, it wouldn't cause us to change those measures at this point.
Operator
And our next question will come from Amy Yong from Macquarie Securities.
Amy Yong - Analyst
Two quick questions. So first, just following up on Automatic Labs, can you give us a sense of what this actually brings to the consumer offering? It looks like it is a consumer facing product, just wondering how that actually gets incorporated into the SiriusXM product itself. And then secondly, can you update us on CRB and how we should be thinking about this particular round of hearings versus the last round?
James E. Meyer - CEO and Director
So I'll take the first and David will take the second. What appeals to me about Automatic is two things. One, they have a very interesting vehicle analytics data platform that, frankly, we think has lacked significant investment and is something that combined with our very large vehicle database, can be leveraged into a very valuable asset. And we'll get on with those plans over the next several months. As important, and so I would say that's less of a consumer-facing advantage. It ultimately should, if it works out, generate revenue in some consumer-facing way. Second though, they do have an adapter that they developed that we found to be quite impressive. They're already on their third generation of technology in that adaptor. And to amplify that a little bit, that adapter, at least in my mind, would give us the capability to reach out to a mammoth number of cars, 150 million of the 250 million active cars in the U.S., and provide connectivity in a way that would provide connected vehicle services to those cars. We have a lot of work to do to understand what the right path of that option might be and what the speed towards that option would be, but that's what appealed to me about Automatic.
David J. Frear - CFO and Senior EVP
So Amy, I'd just add, I think that you can think of it as having applicability in various industry verticals. Some of which are -- there are things that OEMs can benefit from, from this product. There are things that dealers can benefit from. The insurance industry has a very strong interest in this product. There may be information that we can get back out of it on -- depending on the car, on what's happening with radio modules. And there may be other industry applications as well on top of the consumer offering. So we're excited about what we can do with this. On the CRB side, so I'm obviously biased on this one, right? I've been at 3 of -- 3 or 4 of these proceedings over the years providing testimony. But I honestly don't believe that SoundExchange has put much on of a case. The -- there are only three opinions that matter, and those are the judges. And so what I think actually -- I don't think you should necessarily take all that much from it. But there is a very strong record here in prior proceedings about what the judges have thought about the upper bound of a reasonable range of rates. I think that SoundExchange has come back in and more effectively the third time has presented a case says that we think the rate ought to be over 20%. And I just don't think when you look at their case, it actually presented any evidence that would suggest that there's any difference here from the past. On the other hand, I think that there's a very strong link in the case that we've put on that says, if you look at what the judges decided on the webcaster proceeding and that you extend it to satellite radio, there's a very good case for rates going down based on decisions the judges have made about that value of sound recordings in other areas. So what they'll decide, anybody's guess. We'll go through the rest of the testimony and the introduction of evidence over the course of the next few weeks. And then sometime in late fall, we'll do what they think.
Operator
Our next question will come from Jason Bazinet from Citi.
Jason B Bazinet - MD and U.S. Cable and Satellite Analyst
I've noticed in just the recent period, sort of this LSXMA series spread has tightened a bit, meaning the market seems to think something's going to get resolved. I just have a 2-part question. Do you think that's true? And if so, what are the options at your disposable to sort of collapse the 2?
David J. Frear - CFO and Senior EVP
So I think the collapse of the 2 isn't really up to us. I mean, if Liberty wants to collapse it, I'm sure they'll make a proposal. The spread widened for quite a while. And then, in the course of the last week, tightened, I think I read a note that Bircher had bought more of the tracker and there was some feeling that helped drive a tightening of the spread. Other than that, Jason, we're in the business of running a satellite radio company and maximizing value of SIRI, and where LSXMA trades is neither here or there to the management of the company.
James E. Meyer - CEO and Director
I want to reiterate that, Jason -- I want to reiterate, I pay zero attention to the value of that stock. And you can imagine, we pay a lot of attention to the value of SIRI. Liberty will do -- Liberty will decide what Liberty wants to do. And when they decide, I'm sure, they'll let us know. I think beyond that -- but I certainly don't know of any plans they have.
Operator
We'll move next to Ben Swinburne with Morgan Stanley.
Benjamin Daniel Swinburne - MD
Jim, can you talk a little bit about how you're thinking about folding in this new acquisition into the [Ijiro] platform from a product perspective? And whether this brings some additional OEM relationships into the company that you didn't have before? And then David, can you give us any help on the Canadian recap in terms of impact to financials, whether you'll consolidate Canada now or is there any change to the license payment structure? Anything on those lines will be helpful.
James E. Meyer - CEO and Director
I'll take the first one. Ben, if you -- when you heard my comments, you noticed I tread a little bit of water and said that we would get back to you late this year or early next year with -- and the reason that I did that is right around your question, okay. First and foremost, we will operate Automatic in the foreseeable future as a separate entity. I don't mean that it will just sit out there on its own. In fact, I've made some realignments I'm announcing this morning in my organization to put more focus on it. How we consolidate it eventually within the CV organization, we're still working on it. And the reason we're still working on that is as you know, we are the provider -- we've been chosen to deploy Toyota, Honda, Nissan and [STA] CV platforms, and all of those platforms are either rolling out right now or roll out over the next 4 months. And my team on the CV side is totally focused on those rollouts. And so, after we get those rollouts under our belt, a few of us will begin to figure out how we integrate these within the platforms. What I will tell you is I'm very confident they'll integrate well together. I just quite honestly haven't figured out exactly how we want to do it yet.
David J. Frear - CFO and Senior EVP
Okay. On Canada, we've said previously that we will not be consolidating the results that -- while we'll have a 70% economic interest in the recapitalized company, the Canadian board will control the company and the Canadian shareholders have super-voting shares and -- as it relates to matters like electing the board. So we don't fit the control definition under the accounting rules in order to validate it. So you'll see the effect, the economic effect of Canada come through in a couple of different line items. One will be other revenue that the royalty rates will go up post-recapitalization. So you'll see that come through other revenue. There'll be an adjustment in the dividends we received, and to be honest, I can't remember exactly what that is. So the change that runs through other income. And then to the extent that -- one of the things that we've talked about, we haven't made a decision yet, is if we call the Canadian bonds they had issued and replace it perhaps with funding from the U.S., that you could find a boost in interest income. But the way that I think you can think about it is that we incorporated the effect of an anticipated closing of Canada in all of the guidance that we gave. So that would be in revenue in adjusted EBITDA and free cash flow. It's already in our guidance. I will tell you that it's closing a couple of months later than we thought. And so when expressing our confidence in all the guidance this quarter, we feel confident in being able to make up for a couple of months of lost economics in Canada.
James E. Meyer - CEO and Director
Ben, the only other comment I'd make on Canada, is number one, I think our team's done a really, really good job here, and I'm pleased with the outcome. For me, there's all the way the numbers move around and there's the basic reason why are we doing it. And that is SiriusXM Canada has run as a separate company. And I know that may be hard for you to believe, but they haven't been able to take advantage of all the investments we're making in all our various platforms. With this transaction, we can move a lot of that out of the way, okay? And I see, certainly, not maybe as we move through the next 2 or 3 quarters, but as we go into '18, just the opportunity to run that business better because of the economies of scale.
Operator
Our next question will come from Tom Eagan from Telsey Advisory Group.
Thomas William Eagan - MD and Senior Research Analyst
First, on some of the investments. You've invested materially in the streaming platform and 360L. How do you measure the return of that investment? Are there certain metrics that you plan to use? Or is it more broader than that? Are you just thinking about improving the overall listening experience and improving engagement? And then I have a second question.
James E. Meyer - CEO and Director
So I think it's, #1, it's much more the latter than the former. However, we have real expectations for what we believe we can achieve in terms of how -- of metrics of how we expect customers to use it. And so I would tell you, our first intention of 360L is we believe we'll get better engagement with our customers and better engagement with our subscribers. And we will be able to measure that. And I can tell you, in the game we're in, it's all about engagement. And so that's the first and foremost reason. Second is I really do believe, and when you see the demos of 360L, it really helps us on the back end of our business remove friction for customers, both to find whatever programming they want and also to be able to deal with us in a much easier way, whether it's renewing their subscription, converting or anything else they want to do with us. So we bundle that altogether. I want to caution you here, and I've been really consistent here from when I began to share with you in the early days of 360L, this is a march, not a sprint. While in my comments, I was very deliberate to say we expect to roll this technology out beginning in the first quarter of 2018, it will take many, many years for this to roll across all the OEM platforms.
David J. Frear - CFO and Senior EVP
Tom, I'll just add that, I'm glad that you've separated those things out as streaming and 360L. But as you know, we have been charging for our streaming services for 8 years. And what you -- I think you can think about the investments we made in streaming as having taken profits from that business and reinvested it in improving the streaming app and the platform resiliency for it that -- as opposed to making an investment and hoping that it pays off sometime in the future that -- that's a product that was at, not too long ago, on a 2004, 2005 technology base. It needed to be updated, I think it's -- you can tell by the ratings that it's come up pretty well. 360L is 100% going to pay off and pay off large. The investments we're making are substantial, but relative to the scale of the business, very small changes in conversion rates and churn will pay off.
Thomas William Eagan - MD and Senior Research Analyst
Do you want to share with us any expectations about changes in renewal rates or conversion?
James E. Meyer - CEO and Director
Not yet.
David J. Frear - CFO and Senior EVP
Not at this point.
Thomas William Eagan - MD and Senior Research Analyst
And then secondly, on some of the exclusive content that you provide subscribers, how is that financed? Is it -- do you use other partners? Can you license that after the SIRI airing to other platforms, and any synergies with say, any other Liberty affiliates like Live Nation?
James E. Meyer - CEO and Director
No. Obviously, all of the talent that we use in our programming, we pay for ourselves. We have not been interested in sub-distributing our content in any other way at this point. And I don't think we are.
Operator
Our next question will come from Jim Goss with Barrington Research.
James Charles Goss - MD
Just one follow-up to what Tom had just asked. Is there any time frame over which you expect the 60L program to have any impact on profit metrics? I know you said it's a march versus a sprint, but is -- how long is that march before it starts to hit some of the metrics?
James E. Meyer - CEO and Director
It's many, many, many quarters. What I'm very pleased with is our engagement with the OEMs and their excitement about the platform. I've been here 13 years and the one lesson perhaps I've learned the most is we can get as frustrated as we want about changing the OEM cycle, we're not going to change it. And so our deployment is tied in directly to when they deploy their new platforms. I'm very comfortable that we're wired in with them as they deploy at various points. But I will tell you, it takes a long time, quite candidly, just like it did initially when they introduced satellite radio.
James Charles Goss - MD
Okay. And sort of a separate issue, you always discuss a lot of the things that go into the mix of subscriber additions. Is there any way to separate out what share of those sub adds you're getting from new cars versus used cars at this stage? And how rapidly you expect that mix to shift given peaking SAAR versus a growing base of used cars with installed radios?
David J. Frear - CFO and Senior EVP
I think our new car additions are a little less than half now of total additions. Yes. And they're going to just tick down bit by bit by bit. You know in a way it's...
James E. Meyer - CEO and Director
As a percent.
David J. Frear - CFO and Senior EVP
Yes. As a percent. In a way, it's not dissimilar to the answer Jim just gave you on the rollout of 360L, that everything, as it relates to automotive distribution, pursues sort of like an evolutionary as opposed to a revolutionary path. The changes are -- they are slow, but they are steady and they are inexorable in where they're going to go. It's just going that way. As Jim said in his comments that we're going to see the pen rates on used car sales go from low 30s to the mid-70s. It's probably going to take a solid decade for that to occur. And as it does, you're going to find subsequent owner additions continuing to rise for that entire period of time.
James E. Meyer - CEO and Director
But I didn't -- and I couldn't agree more. One point I want to make, Jim, is there are a lot of things we can debate about, whether they're going to happen or not. That mix from mid-30s to mid-70s is just math, and it's absolutely going to happen. There's 0 chance it's not going to happen, okay? It's just a question of how long is it going to take.
James Charles Goss - MD
Okay. And do you think, in that context, do you think used car conversion rates will start to rise as the whole concept of Sirius just becomes that much more prevalent?
James E. Meyer - CEO and Director
I think we've gotten a good idea now that we've been at it for 14 or 15 years about where new car conversion and how it behaves, okay? We really understand well model mix. We really understand, even within that, trim mix. And we now really understand how people who have never used our service before convert versus people who are just literally changing from one car to another and how they convert. So we've got a really, really good idea. On used cars, we're still really, really new to this game. So what I say is my feeling, I don't have a ton of analytic data yet to support it, but I believe we will probably, rather than used car rates increasing, I just believe we'll continue to see more pressure on those rates. And I'll tell you why. Number one, we're going to a much, much wider demographic as we expand out. And number two, we're going to -- as you think about it, we're going to get older and older and older vehicles, which are second and third cars in the family. And frankly, one of the challenges our marketing group is looking on -- is looking at and will be developing strategies on is what is the right way to market to those customers and quite frankly, what might be the right way to price those customers as we look at what's the value of those subscribers going forward.
David J. Frear - CFO and Senior EVP
So Jim, we think it's more volume at a lower rate, and so we'll end up with more additions. And so when we talk about growth in used car volumes over a decade, we mean growth in conversions. And so -- I mean the only thing we have to go on is new car, right? So as new car penetration rates went up, conversion rates came down. But at the same level of auto sales, you ended up with more total volume than conversions, and that's our expectation at this point for used cars as well.
Operator
We will take our next question from Brandon Ross from BTIG.
Brandon A Ross - Associate Analyst
First, on the sub guide for the year, you mentioned the industry still expects about low 17 million SAAR for new cars. Can you tell us the assumptions for industry used car sales you're embedding in your guidance since used cars are such a big part of your growth additions now? And then following up on Jason's question, would you pay a premium to buy back the 2/3 of your stock that Liberty owns as opposed to Liberty making an offer to the minority holders? And then finally, as you mentioned your stock performance in your prepared remarks, as your stock has climbed higher, does that affect your thinking on the mix of your capital return?
James E. Meyer - CEO and Director
So I think on the first question, we -- today, we don't look at the used car market as a total -- and track it is a total industry for one simple reason. Our penetration is, as I said, yes, I think -- in the first quarter was about 34%. So we tend to look at the segments more, meaning how many SiriusXM-enabled vehicles are becoming available and how many of those are selling. That said, I -- right now, we think used car sales are about consistent also as an industry being flat with the year-ago period. However, the mix within those is changing a little bit in that the high end of used car sales seems to be under more pressure as used -- as new car pricing has gotten a little more competitive here in the last 4, 5 months. And yet, the other part of the used car market seems to be growing a little faster. In terms of what's in our guidance that we're using for used car net -- gross adds, we think we understand that pretty well, and we're confident in how that looks for the rest of the year.
David J. Frear - CFO and Senior EVP
On would we consider paying a premium for Liberty's holdings in Sirius, I guess if Liberty was interesting in selling their holdings in Sirius, we'd certainly consider it. Based on the public comments they've made, Greg has said that he anticipates that they will eventually own 100%. So that doesn't sound like it's available for sale. As -- in terms of a higher price and mix of capital returns, I'd like to go back to -- as management, I don't think we care who owns the company. I mean, we run the company for the shareholders. And so if Liberty wants to be a shareholder, we think that's fantastic. If Berkshire Hathaway wants to be a shareholder, we think that's fantastic. And if it turns out that they don't want to be shareholders and somebody else wants to be a shareholder, our job is just to run the company and drive value for whoever our shareholders are. In terms of a higher price and mix of capital returns, that -- sure. I guess, the value of the stock plays into it. We do take a point of view on value in the buyback program. And the -- while we don't announce target values, that we do run grids that are price sensitive and we buy significantly more stock in periods of weakness. And we buy a little bit less in periods of strength.
James E. Meyer - CEO and Director
One other point I'd like to make, and again, you're going to have to ask Liberty whatever Liberty wants to do. But I can tell you, our relationship with Liberty has never been better. My relationship with Greg Maffei is extremely strong. And I tell you, I take personal pride in the fact that our largest shareholder wants to own more of our company. That, to me, is a real endorsement of the strength of our business and our company.
Operator
And our final question will come from Vijay Jayant with Evercore ISI.
James Maxwell Ratcliffe - Research Analyst
It's James Ratcliffe for Vijay. Two, if I could. Sounds like, you said in the prepared remarks, that the used car conversion is holding in there around 30%. That seems pretty encouraging. Could we drill down into that a little bit? And how much of that is you're getting a larger swath of the transactions and the information on that more rapidly? And how much of that is just better execution against the transaction base that you know about? And secondly, regarding -- you've seen unlimited data get much extensive over the course of the last quarter, do you guys have any sense of how -- what take rates for the satellite radio service are for customers who have an unlimited data option on their phone and hence, wouldn't effectively be paying for streaming audio versus customers who don't?
James E. Meyer - CEO and Director
So, I'll start and then David will address the specifics. I want to make a very deliberate point here and that is, I think -- for those of you that are following our company and for investors, I want to be clear on how we run this company. While we provide conversion metrics for you, that's not the way we're running the company. And I'll give you a great example. In the used car funnels, as you can imagine, we are still getting much more -- we continue to get more sophisticated every quarter on how we find these leads. And occasionally, we'll find huge pockets of records, maybe 100,000 vehicles that sold that we didn't know it sold with SiriusXM in them and now we get those records, and those customers may have already owned those cars for 9 or 12 months, okay? I can tell you that when we go out to try to convert people who have owned the car longer than what would be our normal trial period, they convert at a lower rate. If you are running the business to maximize conversion rate, you would pass on those opportunities. That is not the way we run the business. We run the business to maximize the total additions from those funnels. So if we see an opportunity where the conversion rate is 12% and in this particular, the used car metrics, our cost to add those subscribers is so attractive, we're going to take that opportunity. And that's why I want you to be careful using those metrics. We provide them, and I think they help you be able to look at the top of our funnel and guess the yield from the bottom of our funnel. Particularly in the used business, they are not an indication of the demand for our service.
David J. Frear - CFO and Senior EVP
So on -- I couldn't agree more with what Jim said, that a lot of the conversion marketing efforts are about the efficiency of the touches. And so -- but the used car conversion rate is -- it comes from sort of multiple different channels within used cars, and it is one of these things that we do expect it to decline over time. So I've said many times, I've been surprised at how strong it is and how long it stayed at this level. And so we continue to be really pleased with where it is. In terms of unlimited data plans, James, I -- we see 0 impact of that on our business at this point.
Hooper Stevens
Thank you. And with that, we'll wrap it up, and we'll speak to you next quarter. Thanks for your participation.