Ad verification and measurement provider Integral Ad Science went public Wednesday after filing an S-1 with the Securities and Exchange Commission earlier this month.

The New York-based company began trading on the Nasdaq at $18 per share – above the initial $15 to $17 price range – raising $270 million through the sale of 15 million shares. The stock price was up nearly 19% to $21.37 as of midday.

The initial public offering puts the company’s value at $2.5 billion, with an enterprise value of $2.6 billion.

IAS, whose clients include Verizon, Disney and Coca-Cola, is the latest in a slew of ad tech companies to go public in recent months. Its initial public offering comes on the heels of rival DoubleVerify’s IPO in April. DoubleVerify is currently valued at $5.4 billion, and its offering was one of the biggest ad tech IPOs in recent memory.

IAS is clearly using that wave…

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