The World Trade Center and Pentagon disasters caught Internet companies just as they were starting to deliver pro forma profits. Here are some dot-coms that could get hit hard in the fourth quarter:

COMPANY PRE-WTC 4TH QUARTER NEW ANALYSIS PROFIT ESTIMATE* ESTIMATE*

YAHOO $17.2 $11.5 Analysts see holiday ad sales off 10% to 20%

EXPEDIA 11.1 1.5 Business fell 55% after disasters

TRAVELOCITY.COM 5.9 0 Relies mainly on airline ticket commissions, so lower volumes hit home

HOMESTORE.COM 21.8 14.1 Could get worse if real estate tanks

PRICELINE.COM 8.8 0 Its target customers, consumers, are especially skittish about travel

* Numbers, in millions, are pro forma profits, excluding accounting adjustments.

Data: First Call/Thomson Financial, Goldman Sachs, Merrill Lynch, Prudential Securities, Yahoo Finance

Before it's here, it's on the Bloomberg Terminal. LEARN MORE