Kenneth Tarpey
Analyst · Deutsche Bank Securities
Thank you, Magid. GAAP revenue in the fourth quarter was $62.6 million, up 22% year-over-year. Subscription revenue in the fourth quarter of 2011 was a record of $52.2 million, up 22% also year-over-year. Subscription revenue represented 83% of total revenue. Project revenue was $10.4 million, up 25% from the fourth quarter of 2010 and up from the third quarter 2011. Total revenue was negatively impacted by approximately $600,000 due to foreign exchange fluctuations in the fourth quarter. GAAP revenue from existing customers was up 28% year-over-year in the fourth quarter to $55.9 million and represented 89% of total revenues. We added 54 net new customers in the fourth quarter with our customer count now standing at 1,978. Our focus on international expansion continues to drive an increase in international revenue.
In the fourth quarter, revenue from outside United States was $17.1 million or 27% of revenue and up 56% year-over-year. Our top 10 customers represented 24% of revenue in the fourth quarter reflecting increased diversification in our overall customer base. Consistent with this trend, we had no 10% customer in the fourth quarter.
Turning now to expenses, gross margins were 70%, up from 67% level the last few quarters and in line with the 70% gross margin from the same quarter a year ago. Gross margins, which were impacted by the effects of our 2010 acquisitions have now bounced back to more normalized levels. GAAP pretax loss was $4.4 million in the fourth quarter, as compared to a GAAP pretax loss of $1.5 million in the fourth quarter of 2010. Note that our GAAP pretax loss was impacted by $7.8 million of Nielsen litigation and related settlement costs. Absent these expenses, we would've been pretax profitable at $3.4 million on a GAAP basis in the fourth quarter of 2011. The Nielsen settlement payment of comScore stock in exchange for certain Nielsen patents was fair valued at $16 million due to the stock voting and holding terms.
The acquired patents we then determine to have a current value of $11 million, which was recorded as intangible assets, which will be amortized over the remaining patent years of approximately 8 years. The $5 million difference amount was recorded as a 1x settlement charge in the fourth quarter of 2011.
Turning now to taxes. Our effective GAAP income tax rate in the fourth quarter was a 26% benefit rate due to the current booked pretax loss position. GAAP net loss was $3.3 million or $0.10 per basic and diluted share in the fourth quarter of 2011 based on a basic and diluted share count of 33.2 million shares. Non-GAAP net income for the fourth quarter of 2011 was a record $11.8 million or $0.35 per diluted share, excluding litigation costs, settlement cost, stock-based compensation, amortization of intangibles, acquisitions-related expenses. This amount compares to a non-GAAP net income of $7.8 million or $0.24 per share in the fourth quarter of 2010.
With our varying tax rates and nontax -- noncash expenses, we believe that adjusted EBITDA is a useful measure for investors to use to evaluate our operating performance. Adjusted EBITDA takes non-GAAP net income and adjusts it to exclude the cash tax provision, depreciation, intangible amortization costs, stock-based compensation expense, acquisition-related expenses, litigation costs, net interest income and the impact of purchase accounting on acquired deferred revenue. On this basis, adjusted EBITDA was a record $15.4 million in the fourth quarter compared to $11.5 million in the fourth quarter of 2010, an increase of 34% and representing an adjusted EBITDA margin of 24.6%. Our adjusted EBITDA came in higher than anticipated as we continually focus on improved execution to drive margin leverage.
For the full year now of 2011, revenue was $232.4 million, up 33% from 2010. GAAP net loss was $15.8 million or $0.49 per share. Note that our GAAP net loss was impacted by 2011 cost of $16.5 million of litigation cost and related settlement cost. Adjusted EBITDA was a record $47.1 million, up 23% compared to 2010. Though adjusted EBITDA margin of 20.3% for 2011 was down from 21.9% in 2010, we believe improving margin trends that we started to see in the second half of 2011 will carry into 2012. Non-GAAP net income in 2011 was also a record of $31.8 million or $0.97 per share.
Turning now to cash flow. Cash flow from operations for the fourth quarter of 2011 was $7.9 million. Our cap expenditures were $1.3 million in the quarter. This resulted in the fourth quarter free cash flow of $6.7 million, which included a $1 million cost outflow of legal cash payments related to the Nielsen litigation.
Looking at 2011 for the year, cash flow from operations was $26.8 million. Our capital expenditures was $7.2 million, which resulted in the 2011 free cash flow of $19.5 million, which was also incorporated in the negative impact of cash payments of $11 million related to the suit and settlement of the Nielsen litigation. Adjusting for these nonrecurring payments, free cash flow would have been $30.5 million in 2011.
Total deferred revenue, which includes current deferred revenue of $68.7 million and long-term deferred revenue of $1.7 million was $70.4 million. This total deferred revenue is comprised of cash paid upfront for subscription licenses or subscriptions that will be recognized over future periods. As expected, we had strong renewal activity in the quarter, so we saw a healthy improvement in deferred revenue in Q4 over Q3. We have seen more customers shipping to quarterly or monthly payment terms rather than more accelerated payment terms because of the growing scale of our contract sizes with large customers, as well as current general economic conditions. These shifts in billing terms reduced deferred revenues by lowering advance billings as a percentage of overall bookings.
Our full year GAAP tax rate was a benefit rate of 16%, and the tax benefit of current losses was somewhat minimized by valuation allowances mainly related to Netherlands. On a full year basis, our cash tax rate was 7% and as a result of our profitability in certain international jurisdictions such as Canada, some South American countries and certain states where we do not have net operating loss carryforwards available. For 2012, we project an annual GAAP tax rate of approximately 52%. The GAAP tax rate is somewhat higher due to the inability to deduct current losses, again principally in Netherlands due to valuation allowances. For 2012, we anticipated annual cash tax rate of 8%. We continue to hold significant net operating loss carryforwards in the United States, certain states in the U.S., certain international subsidiaries, principally Netherlands and U.K.
As of December 31, 2011, cash, cash equivalents and short-term investments totaled $38.1 million. Our receivables of $54.4 million increased from the $54.3 million of a year ago and up $13 million sequentially due to the growth of our business and the timing of our fourth quarter bookings. Our DSOs of 88 days are consistent with the fourth quarter last year.
Now let me turn to our guidance for the first quarter of 2012 and the full year of 2012. We anticipate full year revenue growth of 19% to 21% based on current foreign exchange rates. As I mentioned, foreign exchange had approximately 1% negative impact on our fourth quarter revenue growth rate and at current exchange rates, we anticipate a 1% impact on 2012 growth rate, which we factored for. Therefore, we're anticipating full year revenue to be between $277 million and $281.7 million in 2012.
With respect to revenue patterns through the year with momentum from newer products such as Dax and validated Campaign Essentials growing throughout the year, we expect quarterly year-over-year revenue growth to expand as we progress through the year. From a profitability perspective, we're maintaining our sharp focus on executing to drive profitability ahead of revenue and anticipate that adjusted EBITDA margins will grow by approximately 50 to 150 basis points from the 2011 adjusted EBITDA margin of 20.3%.
We anticipate GAAP income before income taxes to be in the range of $7.4 million to $10.7 million. We anticipate adjusted EBITDA to be in the range of $56.9 million to $60.2 million. For the full year of 2012, we anticipate average fully diluted share count of 34.8 million shares.
Now for the first quarter of 2012, we anticipate revenues in the range of $61.8 million to $62.8 million, which represents an expected increase of 17% to 19% over the first quarter of 2011. We anticipate first quarter GAAP loss income before taxes in the range of a $600,000 pretax loss to a $200,000 pretax income. As in the fourth quarter, first quarter GAAP income before taxes will be impacted by a number of noncash items. We currently expect approximately $2.3 million in amortization of intangibles and patents and $5.4 million in stock-based compensation.
Therefore, we anticipate adjusted EBITDA for the first quarter of 2012 to be in the range of $10.9 million to $11.7 million, which represents an adjusted EBITDA margin of 18% at the midpoint of our revenue and adjusted EBITDA guidance. Our estimated fully diluted share count for the first quarter is 34.5 million shares. A reconciliation of GAAP net income for income taxes to adjusted EBITDA guidance for the first quarter and the full year of 2012 is included in the tables to our earnings press release. With that, operator, we can now open the lines to take questions.