Certain Concentrations

Markets with concentrations of revenue were approximately as follows:



For the year ended	2019		2018		2017
Mobile	25	%	20	%	20	%
Client and graphics	20	%	25	%	20	%
Enterprise and cloud server	20	%	25	%	15	%
SSDs and other storage	15	%	15	%	20	%
Automotive, industrial, and consumer	15	%	10	%	15	%

Revenue from Huawei Technologies Co. Ltd. was 12% of total revenue for 2019. Revenue from Kingston Technology Company, Inc. was 11% of total revenue for 2019 and 10% of total revenue for 2018 and 2017. No other customer exceeded 10% of our total revenue. Our sales to Huawei were included in our MBU, CNBU, SBU, and EBU segments and our sales to Kingston were included in our CNBU, MBU, and SBU segments.

We generally have multiple sources of supply for our raw materials and production equipment; however, only a limited number of suppliers are capable of delivering certain raw materials and production equipment that meet our standards and, in some cases, materials or production equipment are provided by a single supplier.

Financial instruments that potentially subject us to concentrations of credit risk consist principally of cash, money market accounts, certificates of deposit, fixed-rate debt securities, trade receivables, share repurchase, capped call, and derivative contracts. We invest through high-credit-quality financial institutions and, by policy, generally limit the concentration of credit exposure by restricting investments with any single obligor and monitoring credit risk of bank counterparties on an ongoing basis. A concentration of credit risk may exist with respect to receivables of certain customers. We perform ongoing credit evaluations of customers worldwide and generally do not require collateral from our customers. Historically, we have not experienced material losses on receivables. A concentration of risk may also exist with respect to our foreign currency hedges as the number of counterparties to our hedges is limited and the notional amounts are relatively large. We seek to mitigate such risk by limiting our counterparties to major financial institutions and through entering into master netting arrangements. Capped call agreements expose us to credit risk to the extent the counterparties may be unable to meet the terms of the agreements. We seek to mitigate such risk by limiting our counterparties to major financial institutions and by spreading the risk across several major financial institutions. In addition, the potential risk of loss with any one counterparty resulting from this type of credit risk is monitored on an ongoing basis.