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All tech companies in Silicon Slopes should be aware of one number: 150.

Quartz editor-in-chief Kevin J. Delaney revealed Tuesday that new companies often see something of a shift once they hire more than 150 people. These shifts are often seen in the organization of a company and some of the fundamentals of how the company works.

Facebook chief product officer Chris Cox said it has a lot to do with the company’s size.

“I’ve talked to so many startup CEOs that after they pass this number, weird stuff starts to happen,” Cox said at the Aspen Ideas Festival this summer, according to Quartz. “The weird stuff means the company needs more structure for communications and decision-making.”

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Delaney said he faced similar issues at Quartz. Once the news website exceeded 150 staff members, it made changes to the staff’s organization.

Patty McCord, who was chief talent officer at Netflix from 1998 to 2012, told Quartz she's seen this phenomenon throughout her career.

“It’s a conversation I’ve had with every single CEO I know who’s had a company that’s moved from 150 to 300 people,” she said.

You can read more about how to recognize the signs that this “weird stuff” is about to happen at your company and discover what to do next when you reach the 150 mark at Quartz.