Fastly Inc. priced its initial public offering at $16 a share Thursday evening, raising more than $180 million for the San Francisco software company. The company announced that it will sell 11.25 million shares at that price, the top of its proposed range of $14 to $16, to raise $180.8 million. Underwriters -- led by BofA Merrill Lynch, Citigroup, and Credit Suisse -- have access to roughly 1.7 million more shares that could push the total higher. At the IPO price, Fastly would have an initial market cap of $1.45 billion. Shares are expected to begin trading Friday morning on the New York Stock Exchange under the ticker symbol FSLY.