Concentration of Credit Risk

6 Months Ended

Jan. 23, 2016

The Company's customer base is highly concentrated, with its top five customers accounting for approximately 66.7% and 59.8% of its total contract revenues during the six months ended January 23, 2016 and January 24, 2015, respectively. Customers whose contract revenues exceeded 10% of total contract revenue during the three or six months ended January 23, 2016 or January 24, 2015 were as follows:



	For the Three Months Ended		For the Six Months Ended
	January 23, 2016	January 24, 2015	January 23, 2016	January 24, 2015
AT&T Inc.	22.4%	22.0%	20.6%	21.6%
CenturyLink, Inc.	14.9%	14.0%	15.3%	13.5%
Comcast Corporation	13.5%	13.1%	12.7%	12.9%
Verizon Communications Inc.	11.9%	6.3%	10.7%	6.9%

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 January 23, 2016 or July 25, 2015. AT&T Inc. represented $117.1 million, or 19.3% of combined amounts of trade receivables and CIEB, net as of January 23, 2016 and $101.7 million, or 17.7% as of July 25, 2015. CenturyLink, Inc. represented $77.9 million, or 12.8% of combined amounts of trade receivables and CIEB, net as of January 23, 2016 and $80.1 million, or 14.0% as of July 25, 2015. Another customer represented $80.9 million, or 13.3% of combined amounts of trade receivables and CIEB, net as of January 23, 2016 and $64.5 million, or 11.2% as of July 25, 2015. Comcast Corporation represented $70.1 million, or 11.5% of combined amounts of trade receivables and CIEB, net as of January 23, 2016 and $63.0 million, or 11.0% as of July 25, 2015. Verizon Communications Inc. represented $65.2 million, or 10.7% of combined amounts of trade receivables and CIEB, net as of January 23, 2016 and $50.8 million, or 8.9% as of July 25, 2015. Additionally, Windstream Corporation represented $64.0 million, or 10.5% of combined amounts of trade receivables and CIEB, net as of January 23, 2016 and $47.8 million, or 8.3% 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 January 23, 2016. 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.