Key story highlights:
ComScore's stock dropped slightly in its first day of trading.
CEO Bryan Wiener called the listing debut "a major milestone."
Wiener says he won't focus on the share price.
ComScore Inc.'s (NASDAQ: SCOR) return to a public listing on the Nasdaq exchange might best be described as anticlimactic.
The Reston-based audience measurement company had endured a costly yearslong internal investigation and audit to produce the delayed financial statements that it was unable to provide…
