John Peterson
Analyst · Macquarie Securities Group
Thanks, Robert. As Jerry and Robert pointed out, our results for the fourth quarter and full year were solid. Starting with the fourth quarter, on Slide 11, revenue increased 7.1% to $426 million, primarily driven by residential and commercial growth at TruTeam as well as improved pricing across both segments.
Gross margin increased 120 basis points to 24.5%. Included in this was a onetime favorable reserve adjustment related to an employee benefit policy change at TruTeam, totaling $9.9 million, of which $6 million was included in cost of goods sold.
On an adjusted basis, fourth quarter gross margin was 23.1%, a 90-basis-point sequential increase due to continued pricing improvement. Compared to the fourth quarter of 2014, adjusted gross margin declined 20 basis points, largely due to a $5.2 million favorable insurance adjustment we received in the fourth quarter of 2014, which I discussed on our third quarter call.
I want to point out that while we also received a favorable insurance adjustment in fourth quarter 2015, totaling $5.6 million, this adjustment was largely offset by insurance expenses at TruTeam, which were approximately $5 million higher than what the company has historically incurred for these items. Most of the $5 million is tied to insurance transition costs and some legacy claims settled in the quarter.
As noted in today's release, we believe the charges related to these items will revert to their historical run rate. Normalizing insurance expenses in both quarters, adjusted gross margin in the fourth quarter of 2015 would have increased 100 basis points compared to fourth quarter 2014.
In the fourth quarter, total company operating margin was 10.1% compared to 6.2% a year ago. On an adjusted basis, our fourth quarter operating margin was 7.8% compared to 7.1% in the fourth quarter of 2014. As a reminder, in fourth quarter 2014, we were incorrectly allocated a favorable legal settlement, which overstated operating profit by $1.9 million. Excluding this, and normalizing insurance adjustments in both years, adjusted operating margin in fourth quarter 2014 would have been 5.3%, resulting in a 250-basis-point improvement year-over-year.
Looking at the full year, revenue grew 6.9% to $1,616,000,000, and gross margin was 22.1%. Adjusted gross margin for 2015 was 21.8%, down 10 basis points, largely due to the prior year insurance adjustment I just discussed.
For the full year, the company's operating margin was 5.2% compared to 2.7% for 2014. On an adjusted basis, our operating margin for 2015 was 5.6%, a 160-basis-point improvement from 2014.
Adjusted EBITDA for the quarter was $38 million, a 6.7% improvement year-over-year. For the full year, adjusted EBITDA was $107.5 million, a 19% improvement from 2014. Normalizing insurance adjustments in both years, and excluding the $1.9 million 2014 legal settlement, adjusted EBITDA improved $8.9 million in the fourth quarter and $23.7 million for the full year.
Turning to Slide 12. Looking at results for TruTeam, this segment delivered fourth quarter revenues of $279.1 million, a 10.9% improvement over prior year. For the full year, TruTeam revenues grew 9.8%, tracking closely to the 10.3% increase in 90-day lagged housing starts for 2015.
Adjusted operating margin for TruTeam was 6.8%, a 130-basis-point improvement over fourth quarter 2014, driven largely by improved volume leverage and cost reduction initiatives. For the full year, TruTeam's adjusted operating margin was 5.1% compared to 2.7% in 2014. Excluding the higher TruTeam insurance charges previously discussed, adjusted operating margins for the fourth quarter and full year 2015 would have been 8.6% and 5.5%, respectively.
Turning to Service Partners on Slide 13. Fourth quarter revenue was $170.1 million, up 1% and the operating margin was 9.1%, down 20 basis points as a result of higher bad debt expense. In addition, as Robert pointed out a few minutes ago, fourth quarter comps were challenging as we did not see accelerated customer purchases of the magnitude we experienced in fourth quarter 2014 and there was a decline in roofing sales. For the full year, Service Partners grew revenue 2.8% to $646 million and improved its adjusted operating margin 40 basis points to 8.7%.
As you can see on Slide 14, adjusted SG&A in the fourth quarter was essentially flat year-over-year. But as a percentage of sales, we saw a 90-basis-point improvement, 15.3% compared to 16.2% a year ago. This reduction was primarily due to volume leverage, lower depreciation and amortization and greater operating efficiencies throughout the organization.
Moving to Slide 15. In the fourth quarter, we recorded a net tax benefit of $18.2 million due primarily to the release of the valuation allowance against certain federal and state deferred tax assets. This was expected and previously discussed due primarily to the company returning to sustained profitability. Going forward, we anticipate no additional material impact from the valuation allowance.
We've adjusted our outlook as far as what we believe our normalized tax rate will be going forward. With 6 months of experience operating as an independent entity, and a more thorough analysis of our standalone tax footprint, we now believe that our normalized effective tax rate will be 38% rather than the 36% rate originally anticipated. Most of the change was driven by greater visibility to our state tax exposure and our Section 199 deduction.
Adjusted earnings per diluted share were $0.52 for the fourth quarter compared to $0.41 for the prior year. For the full year, adjusted earnings per diluted share were $1.33 compared to $0.79 for the full year 2014.
Looking at CapEx on Slide 16. In 2015, we invested $14.2 million in capital spending, slightly below our investment guidance of approximately 1% of sales. Working capital as a percent of sales at the end of fourth quarter improved 30 basis points to 6.2% from the prior year, largely due to continued supplier terms improvements in accounts payable.
At the end of December, we had $113 million in cash on the balance sheet. Including our accessible revolver, we had total liquidity of $183 million at year-end.
Overall, we are pleased with our fourth quarter performance and we believe 2016 will be another strong year for TopBuild, based on forecasted housing starts and anticipated benefits from the initiatives that Robert outlined earlier. Cathy, we're now ready for questions.