Google Inc.'s (GOOG) dominant share of the U.S. Internet-search market edged down in July, while No. 2 rival Yahoo Inc. (YHOO) gained ground slightly.
Google still retained the largest market share with 65.1% of all explicit core searches, down from 65.5% in June. Yahoo sites' share widened to 16.1% from 15.9%.
Market shares for Microsoft Corp. (MSFT) sites and IAC/InteractiveCorp's (IACI) Ask.com network were unchanged at 14.4% and 2.9%, respectively. AOL Inc. (AOL) posted a 1.5% share, up from 1.4%.
Users made more than 17.1 billion explicit core searches in July, up 3% from the prior month. Google's sites ranked first with 11.2 billion searches, followed by Yahoo at 2.8 billion and and Microsoft with 2.5 billion.
ComScore has shifted how it reports its data after Yahoo's "contextual searches" skewed results last summer. The group measures U.S. explicit core searches, which exclude contextual searches that don't reflect any intent by users.
-By Drew FitzGerald, Dow Jones Newswires; 212-416-2909; Andrew.FitzGerald@dowjones.com