Rockley currently depends on a few large customers for a substantial portion of its revenue. The loss of, or a significant reduction in, orders from Rockley’s customers, including its largest customer, could significantly reduce its revenue and adversely impact Rockley’s operating results.

Rockley believes that its operating results for the foreseeable future will continue to depend to a significant extent on revenue attributable to a few large customers, including Apple Inc., Rockley’s largest customer, and Hengtong Rockley Technology Co., Ltd. (“HRT”), its second largest customer. Rockley’s two largest customers collectively accounted for 100% and 99.6% of Rockley’s revenue in 2020 and 2019, respectively. Revenue attributable to Rockley’s largest customer accounted for the majority of its revenue in 2020 and 2019, respectively. Rockley anticipates revenue attributable to this customer will fluctuate from period to period, although it expects to remain dependent on this customer for a significant portion of its revenue for the foreseeable future. Rockley has a master supply and development agreement with this customer, which provides a general framework for Rockley’s transactions with it. This agreement continues until either party terminates for material breach. Under this agreement, Rockley has agreed to develop and deliver new products to this customer at its request, provided it also meets Rockley’s business purposes, and has agreed to indemnify it for intellectual property infringement or any injury or damages caused by Rockley’s products. This customer does not have any minimum or binding purchase obligations to Rockley under this agreement and could elect to discontinue or reduce making purchases from Rockley with little or no notice