=Akamai Technologies (AKAM) reported earnings on Tue 26 Jul 2016 (a/h)

Akamai Technologies Inc. warned its core profit could decline this quarter as its biggest Silicon Valley customers invest more in their own network infrastructure.

Shares dropped 11% to $51.70 in after-hours trading as the company warned its margins could also come under pressure as prices for some customers decline.

The Cambridge, Mass., company blamed a revenue pullback from its biggest technology customers like Apple Inc. and Facebook Inc. as they channel more data through their own systems rather than outsourcing the job.

Akamai’s six biggest technology customers, which also include Amazon.com Inc., Alphabet Inc.’s Google, Microsoft Corp. and Netflix Inc., accounted for about 11% of its revenue in the second quarter, down from 18% for the same period last year.