Concentration of Credit Risk

3 Months Ended

Oct. 24, 2015

The Company's customer base is highly concentrated, with its top five customers accounting for approximately 64.9% and 59.4% of its total revenues during the three months ended October 24, 2015 and October 25, 2014, respectively. Customers whose revenues exceeded 10% of total revenue during the three months ended October 24, 2015 or October 25, 2014 were as follows:



	For the Three Months Ended
	October 24, 2015	October 25, 2014
AT&T Inc.	19.1%	21.2%
CenturyLink, Inc.	15.6%	13.1%
Comcast Corporation	12.0%	12.8%

Certain customers represented 10% or more of combined amounts of trade accounts receivable and costs and estimated earnings in excess of billings, net ("CIEB, net") as of October 24, 2015 or July 25, 2015. AT&T Inc. represented $115.8 million, or 16.9% of combined amounts of trade receivables and CIEB, net as of October 24, 2015 and $101.7 million, or 17.7% as of July 25, 2015. CenturyLink, Inc. represented $100.8 million, or 14.7% of combined amounts of trade receivables and CIEB, net as of October 24, 2015 and $80.1 million, or 14.0% as of July 25, 2015. Windstream Corporation represented $71.8 million, or 10.5% of combined amounts of trade receivables and CIEB, net as of October 24, 2015 and $47.8 million, or 8.3% as of July 25, 2015. Comcast Corporation represented $70.6 million, or 10.3% of combined amounts of trade receivables and CIEB, net as of October 24, 2015 and $63.0 million, or 11.0% as of July 25, 2015. Additionally, another customer represented $89.9 million, or 13.1% of combined amounts of trade receivables and CIEB, net as of October 24, 2015 and $64.5 million, or 11.2% as of July 25, 2015.

The Company believes that none of its significant customers were experiencing financial difficulties that would materially impact the collectability of the Company's trade accounts receivable and costs in excess of billings as of October 24, 2015 and July 25, 2015. See Note 4, Accounts Receivable, and Note 5, Costs and Estimated Earnings in Excess of Billings, for additional information regarding the Company's trade accounts receivable and costs and estimated earnings in excess of billings.