Infosys and Wipro have seen that happening, as their revenue growth has been hit.
Companies such as Tata Consultancy Services Ltd, Infosys, Cognizant Technology Solutions Corp and Wipro manage well over 700 clients.
While managing large client base puts pressure on the management bandwidth to engage with them, during tougher times, there seems to be an overwhelming focus on managing the large or anchor clients, according to a JP Morgan note.
"In other words, business tends to leak from quarters that larger companies tend to least expect while they are so consumed in maintaining market-share with their key clients and/or winning new deals," say research analysts Viju George and Amit Sharma of JP Morgan in the report.
The report also points out that the loss of existing market share to competition from unforeseen quarters is a damage that laggards like Infosys and Wipro have suffered.
"The market has seen vendor consolidation and some of the players have suffered.
"The senior management of TCS in its recent analyst meet clearly said they will gain due to vendor consolidation in 2013," said an analyst, who attended the TCS meet on condition of anonymity.
Though players like Infosys and Wipro have been adding clients on a regular basis, they have not seen an equivalent impact on their revenue growth numbers.
"If we look at the large deal flow at Tier-1
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