Alejandro Scannapieco
Analyst · JPMorgan
Thanks, Martin, and good afternoon, everyone. I will start by sharing our third quarter and 9 months ended September 30, 2017 financial performance. After that, I will provide guidance for Q4 and the rest of the year. As already pointed out by Martin, revenue for the third quarter was $109.7 million, a record for the company and represented a robust 33.2% growth year-over-year. Growth has been driven by strong traction of our largest client and increasing revenues for customers 11 and beyond, which were up 48.5% over the third quarter of 2016 and 16.4% sequentially.
We expect a gradual transformation of the composition of this group of customers as we dive deeper into our 50 square program. On top of that, this strategy continues to produce results and during the last 12-month period ended September 30, 2017, we had 7 accounts over $10 million in revenues compared to 5 accounts during the same period 1 year ago. This is a clear indicator of our ability to scale up our key accounts.
Our customer concentration numbers for Q3 2017 reflected good diversification and less concentration if compared to past quarters with our top 1, top 5 and top 10 accounts represented 10.3%, 26.8% and 40.7% of revenues compared to 10.4%, 33.9% and 46.8% of revenues, respectively, for the third quarter of 2016. A strong traction of non-top 10 accounts is playing a key role to diversify our portfolio of customers and to decrease concentration.
Disney was once again our top 1 customer for the period, proving our relationship continues to be strong and healthy. As it has been the case over the past several years, our vertical diversification remains balanced across the different industries. Our largest industry for the quarter was banks and financial services with 24.8% of revenues, closely followed by media and entertainment with 24.2% of revenues.
During the third quarter of 2017, 79.1% of our customers were in North America, the U.S. as our top country; 7.6% were in Europe, Spain as the top country; and 13.3% in Latin America and others, Chile our top country. The decrease of Europe's share during Q3 was driven by a combined effect of higher growth in Latin America, mainly Mexico and Peru and in North America.
During the third quarter of 2017, 85.4% of our revenues were denominated in US dollars, limiting the impact of currency fluctuations on the revenue side. During the last 12 months, we rendered services to 346 customers. We now have 78 customers with annual revenues in excess of $1 million compared to 61, one year ago.
Turning now to profitability, our adjusted gross profit for the period increased to $42.8 million, 39% adjusted gross margin compared to $34.2 million, 41.5% adjusted gross margin in the third quarter of 2016. The margin decrease year-over-year was primarily driven by FX headwinds in some of the countries in which we operate.
Sequentially, our adjusted gross margin experienced an improvement of 90 basis points versus Q2. We finished the quarter with 6,397 Globers, 5,925 of which were IT professionals. Attrition for the past 12 months was 18.4% compared to 19.4% one year ago, showing a nice improvement year-over-year, mainly driven by our decentralization efforts.
Our adjusted SG&A for the quarter decreased 190 basis points compared to the previous quarter, accounting for 21% of our quarterly revenues and also diluting 130 basis points on a year-over-year basis compared to the Q3 2016. We will continue to be disciplined in managing our costs, while we continue to invest to expand our footprint in North America, Europe and Latin America.
Our adjusted operating income for the quarter amounted to $15.7 million or 14.3% of revenues compared to $12.8 million or 15.5% for the third quarter of 2016. Share-based compensation expense for the quarter amounted to $4.5 million. This expense was mainly related to a new plan of restricted stock units granted to certain key employees and directors of the company during 2017, as part of our long-term retention program.
Adjusted net income for the third quarter of the year totaled $12.5 million, 11.4% adjusted net income margin compared to 12.8% for the third quarter of 2016. Adjusted diluted EPS for the quarter was $0.34, based on 36.3 million average diluted shares for the quarter in line with our expectations.
Moving on to the balance sheet. Our cash and investments as of September 30, 2017, amounted to $44.1 million compared to $59.9 million as of December 31, 2016. This decrease in cash was mainly explained by our decision to practically self-fund for the time being M&A transactions and CapEx to expand our offices in Latin America, U.S. and Europe.
Sequentially, our cash and investments positions as of September 30, 2017, increased $7.8 million when compared to June 30, 2017. Our balance sheet remains strong with current assets of $141.9 million, accounting for 40.6% of the company's total assets.
Total common shares outstanding as of September 30, 2017, were 35.1 million.
Now let's talk about the 9 months ended September 30, 2017. Revenue for 9 months ended September 30, 2017, was $298 million, implying a 26.5% year-over-year growth. Growth was mainly boosted by both largest customers and non-top customers plus new account wins, mainly coming from financial services and media and entertainment industries.
Adjusted gross profit for the 9-month period was $115.3 million, 38.7% adjusted gross margin compared to $101.3 million, 43% adjusted gross margin for the same period of last year. On a year-to-date basis, we experienced some headwinds of the FX market in most Latin American currencies, combined with wage inflation in Argentina. Adjusted SG&A level accounted for 22.3% and 22.2% of our revenues for the 9 months ended September 30, 2017 and 2016, respectively. This year-over-year investment in SG&A was mainly driven by expansion of U.S., Colombia, Mexico delivery centers and some more sales coverage, mainly executed during the first half of 2017.
During Q3, we experienced a significant decrease in adjusted SG&A sequentially, and we are confident that we can sustain that trend going forward, despite some strategic investments in sales. Our adjusted operating income for the 9-month period ended September 30, 2017, was $37 million or 12.4% of revenues.
Share-based compensation expense for the 9-month period ended September 30, 2017, amounted to $11.3 million, mainly driven by the new long-term retention program explained before. Adjusted net income for the 9-month period ended September 30, 2017, was $31.8 million, 10.7% adjusted profit margin and adjusted diluted EPS for the same period was $0.88 based on 36.1 million average diluted shares for the period.
To wrap up, let me provide you with our guidance for Q4 2017 and for the rest of the year. Based on current visibility, we expect Q4 revenues to be between $108 million and $110 million, implying a 24.9% year-over-year growth at the midpoint of the range. EPS is expected to be between $0.38 and $0.40, assuming 36.5 million average diluted shares outstanding for the quarter.
Looking into the year, we now expect revenues for 2017 in the range of $406 million and $408 million, an implied 26.1% year-over-year revenue growth at the midpoint of the range. In terms of EPS, we are increasing the guidance. We are now expecting a range of $1.25 and $1.29, assuming 36.2 million average diluted shares outstanding for the full year. Thanks, everyone, for participating on the call and for your coverage and support.
Operator, can you please queue questions? Thank you.