Chris Stansbury
Executive Vice President & Chief Financial Officer at Lumen Technologies
Thanks, Kate. Before I discuss the quarter, I want to take a moment to reflect back to Q2 earnings last year. Since that time, we successfully completed a refinancing that addressed over $15 billion of our debt and extended over $10 billion of our maturities. And we secured access to over $2.3 billion in new liquidity and we launched our PCF solutions, as well as our suite of new digital offerings. And we generated early growth in our public sector and the growth segment of our large enterprise business. And as of yesterday, we announced the largest sales in the company's history, totaling nearly $5 billion, fueled by our AI hyperscaler customers.
This is all as we drive a network unification from four discrete enterprise networks to one, resulting in over $1 billion in cost efficiencies. None of this would be possible without our world-class management team, who is executing on our vision. We're moving with pace and we're not done.
The recent developments in our business reflect major proof points in terms of early and material execution on Lumen's transformation path forward and we are pleased the market is starting to value this opportunity. We believe we're in the first inning of the AI growth opportunity for our fiber infrastructure and Lumen Digital Services. Accordingly, the positive impact these private connectivity fabric sales will have on our financials are powerful and clear.
First, we believe the progress we've made on driving PCF sales these past few months is just the beginning of a vast new TAM, which brings long-term, sticky revenue, offsetting higher churn legacy product declines. Second, we estimate that the cash received from PCF sales will close any free cash flow deficit between now and when we reach sustainable positive free cash flow growth.
Third, we will have ample free cash flow to invest in our transformation and reduce debt. And finally, in our view, PCF sales are significant and incremental to the overall value of Lumen's business. The building blocks of our value creation are clear, starting with our nationwide fiber network. We believe Lumen is one of the few companies with the resources and scale to provide the critical infrastructure for AI and the partnerships we've announced represent a large and growing opportunity to provide private connectivity fabric solutions.
We see a runway to growth as we transform telecom and we believe that sets up a value creation path for Lumen, all as we continue to execute on our core strategic goals of commercial excellence, securing the base and innovating for growth. As Kate mentioned, our sales growth engines within our large and mid-market enterprise channels in our business segment, along with our mass market segment, showed solid performance this quarter with large enterprise and mid-market sales, both up over 26% year-over-year.
Additionally, Quantum Fiber broadband net additions of 40,000 again sets an all-time record and we passed the 1 million total fiber subscriber mark in July, outstanding work by the team. While consolidated revenue and adjusted EBITDA still fuels the impacts of legacy declines, we are encouraged by improvements we're making in the business.
Now let's move to the discussion of financial results for the second quarter. On a year-over-year basis, total reported revenue declined 10.7% to $3.268 billion. 36% of the decline was due to the impact of divestitures, commercial agreements and the sale of the CDN business. Business segment revenue declined 11.4% to $2.577 billion and approximately 42% of that decline was due to the impact of divestitures and commercial agreements. Mass markets segment revenue declined 8.2% to $691 million. Adjusted EBITDA was $1.011 billion, with a 30.9% margin and free cash flow with negative $156 million.
Next, I'll review our detailed revenue results for the quarter on a year-over-year basis. Within our North America enterprise channels, which is our business segment excluding wholesale, international and other, revenue declined 3.6%. We continue to expect public sector to be the first channel to pivot to sustainable growth later this year, followed by mid-market and then large enterprise. Overall, North American business declined 5.5%.
Large enterprise revenue declined 6.9% in the second quarter. Our grow revenue was approximately flat year-over-year with continued pressure in nurture and harvest product revenue. We expect continued variability in trends as we drive towards overall stabilization. Mid-market revenue declined approximately 7% year-over-year with improvement in grow, offset by nurture and harvest.
Public sector revenue increased 8% year-over-year, driven by strength in our grow and other product revenue and partially offset by declines in nurture and harvest. We continue to see traction with large bookings in this space, which take time to ramp to revenue and these wins give us continued confidence that public sector will be the first sales channel to return to sustainable growth this year.
Wholesale revenue declined approximately 10% year-over-year. The harvest portion of the wholesale portfolio, which is comprised of products like TDM, voice and private line saw revenue contract by 17.9% year-over-year in the second quarter. This is primarily driven by telco partners that are selling legacy services. Our harvest product revenue will likely continue to decline over time and is an area that we will manage for cash. International and other revenue declined 67.1% driven primarily by the divestiture of our EMEA business and the sale of select CDN contracts in the fourth quarter of last year.
Moving to our business product lifecycle reporting, I'll reference the results based on our North America enterprise channel. The 3.6% year-over-year decrease was due to declines in our nurture and harvest segments, partially offset by grow, particularly enterprise broadband, dark fiber and IT. While results can vary at any quarter, we expect sustained strength in the grow product revenue as we execute on our core turnaround.
Within nurture and harvest, we continue to expect headwinds in these markets to decline in categories. However, we continue to take proactive steps to migrate customers to newer technologies and these actions improve our customer's experience and will provide an uplift in customer lifetime value for Lumen. Additionally, we will continue to pursue opportunities for cost optimization when we help customers migrate from off-net legacy and TDM-based services onto Lumen's network.
Within North American enterprise channels, grow products revenue increased 1.5% year-over-year. Grow now represents approximately 43% of our North America enterprise revenue and for our total business segment carried in approximately 80% direct margin this quarter. Nurture products revenue decreased 12.1% year-over-year. Nurture represents 30% of our North American enterprise revenue and for our total business segment, carried an approximate 66% direct margin this quarter.
Harvest products revenue decreased 10.6% year-over-year and continues to be negatively impacted by declines in TDM-based voice and private line. Harvest represented approximately 16% of our North America enterprise revenue in the second quarter and for our total business segment, they carried an approximate 77% direct margin this quarter. Other product revenue improved 18.5% year-over-year. As a reminder, other product revenue tends to experience fluctuations due to the variable nature of these products.
Now moving on to mass markets. Our fiber broadband revenue grew 14.6% year-over-year and represents approximately 38% of mass markets broadband revenue. During the quarter, fiber broadband enabled location ads were 136,000, bringing our total to over 3.9 million as of June 30 and pacing towards our targeted annual 500,000 bill target this year. We also added 40,000 Quantum Fiber customers, which is our best fiber net add quarter reported to date and this brings our total to 992,000. Fiber ARPU was $62, up slightly both sequentially and year-over-year. Importantly, we reached a significant milestone of 1 million fiber broadband subscribers in July.
At the end of the second quarter, our penetration of legacy copper broadband was approximately 9% and our Quantum Fiber penetration stood at approximately 25%. As we look ahead, we will continue our market-by-market assessment of the mass market's business, as we explore a range of strategic options to maximize its value. Those options include potential joint ventures, wholesaling arrangements or future divestitures to generate incremental cash.
Now turning to adjusted EBITDA. For the second quarter of 2024, adjusted EBITDA was $1.011 billion compared to $1.229 billion in the year ago quarter. Second quarter EBITDA was positively impacted by our strong first quarter sales bookings, as well as efficiency improvements from our second quarter cost actions and overall margin management. Special items impacting adjusted EBITDA totaled $136 million.
The majority of special items in the quarter were related to severance. For the second quarter of 2024, our adjusted EBITDA margin was 30.9%, capital expenditures were $753 million and free cash flow, excluding special items was negative $156 million. As we previously stated, we're leaning into our network investments to support the rapid growth and demand our customers are facing.
Now, before I provide an update on our 2024 financial outlook, I'd like to provide some color around the near-term impacts of our PCF sales and the additional liquidity and flexibility we have. As Kate mentioned, we're moving full speed ahead in investing in our transformation, which includes additional spending on network and systems unification that will ultimately lead to more efficient operations and a better customer experience.
Given our improving liquidity profile, we intend to pull forward some expenses from 2026 and 2027 into 2025, accelerating the timeline of our cost takeout goals. With the investments in transformation and costs associated with recent PCF sales and in conjunction with continued legacy revenue declines, directionally, we see 2025 EBITDA below 2024 levels, with a significant rebound in 2026 and growing thereafter. We will provide more detailed 2025 guidance on our fourth quarter 2024 call in February.
Now moving on to our financial outlook. We now estimate fiscal year 2024 EBITDA to be in the range of $3.9 billion to $4 billion. Capex in the range of $3.1 billion to $3.3 billion, cash interest in the range of $1.15 billion to $1.25 billion and free cash flow in the range of $1 billion to $1.2 billion. This guidance includes some incremental opex, capex and cash flows associated with our PCF sales growth, the gain on a sale of an investment, as well as incremental spending to ultimately improve our cost structure and margins. This additional opex and capex will be fully funded upfront by incremental PCF cash flow.
And with that, I'll turn it back to Kate for closing remarks.