The simple wool shoe started as a Silicon Valley favorite and has spread to Hollywood and beyond.
"It's hard to imagine that company doesn't continue to do extremely well," Dick Costolo argues, pointing to its growing cloud business.
The "Squawk on the Street" crew looks back at 2013 when Twitter went public.
Twitter shares jumped 14 percent in May and Square surged to a record.
Former Twitter boss Dick Costolo shares his best advice for young people trying to chart their future.
Mixpanel co-founder and CEO Suhail Doshi is being replaced at the helm by ex-Twitter executive Amir Movafaghi
He says Twitter did the right thing. Do you agree?
Many of Twitter's high-profile former execs are now in health care.
Former Twitter CEO Dick Costolo, Chorus CEO and Index Ventures mentor, discusses the social media giant's quarterly earnings and how it compares to Facebook.
"I do tend to take the more pessimistic view that it will be hard to keep general AI in a box," Dick Costolo says.
People in Silicon Valley are "concerned about the kind of discourse we're hearing about technology and business," former Twitter CEO Dick Costolo said.
Elon Musk "may be proof that time travel exists," says the ex-Twitter CEO, in praising the former's ability to multitask.
Costolo served as Twitter CEO from 2010 until he stepped down two years ago.
The creators of 'Silicon Valley' have a lengthy list of experts to help guide them, including Snap CEO Evan Spiegel.
Snap's Evan Spiegel will take just a $1 salary following the company's IPO, but he made more than $2 million last year.
Twitter's Adam Bain became the latest top executive at the social media company to hit the exits.
Twitter's stock fell as much as 3 percent as a recent board meeting seemed to do little to clarify market chatter.
Dick Costolo said media companies that provide sports on TV are not immune to cord cutters as more find alternatives in streaming.
Twitter has suspended an additional 235,000 accounts since February for violating a policy related to the promotion of terrorism.
The move would potentially let millions of Apple TV users watch the streaming N.F.L. games, The New York Times reports.