Ilya Cantor
Analyst · Cowen
Thank you, Arkadiy, and good morning, everyone. After my comments, we will open the call for questions. In addition to my comments here, we're now providing a supplemental fact sheet on our website with detailed information about our revenues and results of operations, including information about our verticals, geographies and service offerings. As Arkadiy highlighted, Q3 was another strong quarter. We grew revenue 6% sequentially and 27% over last year to $110 million, which is above the top end of our guidance of $109 million. Earnings per share were $0.37, also above our prior guidance of $0.36 per share.
And our outlook, during our Second Quarter Earnings Call, we identified 2 areas of concern that caused us to lower our revenue expectations for 2012. At first, we had anticipated $2 million to $3 million in additional reductions from Thomson Reuters and also a potential $3 million impact from currency on our revenues. While the Thomson Reuters reductions are proceeding as we had expected, currency did not impact revenues by as much as we initially anticipated. More importantly, as Ark said, we are also seeing very strong momentum across virtually all of our key verticals and target geographies.
With that, we now expect quarter 4 revenues of between $115 million to $118 million which represents year-on-year growth of 21% to 24% and sequential growth of 4% to 7%. We also expect non-GAAP diluted earnings per share to be in the range of $0.35 to $0.37 per share for quarter 4 with an expected share count of 47.4 million and tax rate of approximately 17%. For the full year, we expect revenues to be between $423 million to $426 million, which represents growth of approximately 27%. On a full year basis, we're also raising adjusted earnings growth to be in the range of 18% to 20%, with an assumed tax rate of 16% to 17%.
On the rest of the results, we continue to maintain our lower revenue concentration, with our Top 5 and Top 10 clients accounting for 32% and 45% of total revenue in the quarter, respectively, compared to 32% and 44% in the preceding quarter. On material contracts, we're 85% revenues in the third quarter versus 87% same quarter last year. Fixed fee revenues represented 14% of total revenues in the third quarter versus 10% in Q3 last year.
Turning to our cost. Cost of revenue, excluding depreciation and amortization in the third quarter was $69 million, representing an increase of 34%, from $51.6 million in the third quarter of 2011. The increase was primarily attributable to a net increase of nearly 1,600 IT professionals from September 30, 2011, to September 30, 2012, or an average growth of 24%. Gross margins, excluding stock compensation of $1 million, were 38.2% compared to 40.7% last year, which is within our target range of 36% to 40%. SG&A in the third quarter was 19% of revenues up from 18% in the third quarter of 2011, but down from 20% in Q2. Depreciation and amortization expense was $3 million, up from $2.1 million reported in the third quarter of 2011, which was primarily due to amortization of intangibles from the acquisition of Thoughtcorp in Q2 this year.
GAAP income from operations was $16.7 million, a decrease of 0.9% compared to $16.9 million in the third quarter of 2011 with non-GAAP income from operations of $19.2 million which is an increase of almost 6%, compared to $18.1 million in the third quarter of 2011. Net income for the quarter was $14.1 million, representing growth of 28% [ph] Year-over-year. Non-GAAP net income for the quarter was $17.2 million, a year-over-year decline of 2%. Non-GAAP diluted earnings per share was $0.37, compared to $0.39 last year. However, the $0.02 decline was due to a higher share count of approximately 1 million shares this quarter and a lower tax rate in year-ago quarter. Our non-GAAP diluted share count used for the third quarter of 2012 was $46.5 million compared to $45.4 million in the same quarter last year.
Lastly, our balance sheet remains very healthy. As of September 30, we had $106 million in cash. During the quarter, net cash provided by operations was $11.1 million. We finished the quarter with a DSO of 58 days compared to 51 days in the second quarter of this year. During the quarter, we had $14.1 million in capital expenditures, which approximately $10 million was for progress payments for construction of our new facility in Belarus.
We will now open the call up for question-and-answer session. Operator?