WebProNews

iCrossing has shared the findings from its Enterprise Natural Search Share Index. This is a look at natural search traffic to enterprise level sites, based on a large sample of Fortune 1000 companies across all major verticals.

Google's share of natural search traffic to enterprise-level sites in September increased to 76.68%. That is up from 74.7% last year and 75.89% in August. Bing's share also increased, reaching 8.21%. That is up from 6.46% a year ago (MSN) and 8.06% in August.

Yahoo's share decreased to 11.10%. A year ago it held 14.13% share, and in August it was at 11.83%. Also declining were AOL and Ask, who came in with 1.75% and 0.41% respectively. AOL declined year-over-year from 2.16%.

The results are perhaps not too surprising. The Web search market in general has been following a similar path. Compete data released last week showed that Google increased from 72.3% to 72.6% month-over-month, while Bing's share crawled up from 8.7% to 8.8%. Yahoo's share dropped from 15.8% in August to 14.7% in September.

As our own Doug Caverly noted, "Obviously, Microsoft's incentive to forge a partnership will shrink if Bing can steal searchers away from Yahoo. Yahoo might need to hold its own (or at least lose to Google, but not Bing) in order to make sure Microsoft doesn't think better of the arrangement before the 2010 target date."

Related Articles:

> Compete: Yahoo Stumbled In September

> Facebook/Twitter Use May Now Mean More for Google/Bing Rankings

> Microsoft and Google Score Deals with Twitter