Tumblr founder David Karp has about 81 million reasons to spend the next four years working his current job. The $1.1 billion sale of his baby to Yahoo back in May includes a retention payment of $81 million—$41 million in stock and $40 million in cash, the AP reports, via a regulatory filing yesterday. But the 27-year-old has to stick around until June 2017 to get the full payday. The AP notes it'll likely be a second windfall for Karp, who is thought to have as much as a 25% stake in Tumblr and would have gotten a chunk of change from the sale.
One more detail from Yahoo's filing picked up by AllThingsD: Tumblr had $16.6 million in cash when Yahoo bought it. With 175 employees, Peter Kafka writes that Karp would've had to raise more money relatively fast had Marissa Mayer not stepped in.