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Highly-valued tech startups are going public at a pace not seen in three years.

Four so-called “unicorns,” or private companies valued at $1 billion or higher, completed initial public offerings in the second quarter. That was double what was seen in the first quarter, and equal to the number of unicorn IPOs for the entire year in both 2015 and 2016, according to data compiled by Goldman Sachs.

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The four unicorn IPOs in the 2nd quarter were double what was seen in the 1st quarter, and equal to the full-year total for both 2015 and 2016. Goldman Sachs

These IPOs have seen mixed success. Here’s a breakdown of the four former unicorns that made it to market in the second quarter, with all valuation data from Goldman:

  • Okta — Completed IPO in April, valued at $1.8 billion, above its last funding round, which put it at $1.2 billion
    • Stock has surged 42% since pricing
  • Cloudera Completed IPO in April, valued at $1.9 billion, well below its last funding round, which implied a $4.1 billion valuation
    • Stock has climbed 19% since pricing
  • Delivery Hero — Completed IPO in June, valued at €4.4…