Pinterest Inc. raised about $1.4 billion in its initial public offering, pricing its shares above a targeted range as the year’s tech unicorn stampede gains momentum. The digital scrap-booking company sold 75 million shares Wednesday for $19 each, after marketing them for $15 to $17, according to a statement. Based on the number of Class A and B shares outstanding after the offer, as detailed in a regulatory filing, Pinterest’s IPO price would value it at about $10.1 billion.