Pure Storage, which provides flash memory-based enterprise storage hardware, raised $425 million by offering 25 million shares at $17, the midpoint of the $16-$18 range. At its offer price, Pure Storage commands a fully-diluted market cap of $3.9 billion, and its $425 million offering is the largest for a VC-backed tech IPO this year. The company will list on the NYSE under the symbol PSTG. Morgan Stanley, Goldman Sachs, Barclays, Allen & Company and BofA Merrill Lynch acted as lead managers on the deal.