**Shares of digital ad verification firm Integral Ad Science
IAS.O fall 7.7% to $13.81 after co announces secondary
offering of common stock
** Co announces Vista Equity Partners, its biggest
shareholder, will offer 11 mln shares of IAS to the public at
$14/shr; offering expected to close on Dec 7
**IAS will not be selling any shares of common stock in this
offering and will not receive any proceeds from the sale
** Vista Partners intends to grant an additional sale of
1.65 mln shares of IAS to the underwriters as a 30-day purchase
option
** This is the second time Vista is diluting its stake in
IAS; it previously sold 10 mln shares to the public at $15/shr
in May this year
** Vista had a 49.2% stake in IAS at the end of Sept.- LSEG
data
** 12 of 15 brokerages rate the stock "buy" or higher, three
"hold"; their median PT is $20
** Upto Monday's close, stock up 70.3% YTD
(Reporting by Pranav Kashyap in Bengaluru)