The most comprehensive measure of Internet companies defined through Wilshire's own research. Wilshire classifies a company as Internet if a majority of a company's business is directly tied to the Internet.

• Publicly traded companies defined as Internet companies through Wilshire Associates’ research.
• Wilshire Associates classifies a company as Internet if a majority of a company's business is directly tied to the Internet.
• New Internet stocks are added to the Wilshire Internet Index at the end of each month.

• Additions to the index are made once a month after the month-end close.
• IPOs will generally be added at the end of the month (provided we have a "good" shares outstanding value.)
• If a stock in the Wilshire Internet Index is acquired or stops trading, the stock is dropped from the Index on the last day it is traded.
• A security will be excluded from the index on the day it fails Dow Jones Wilshire 5000 Index inclusion guidelines.
• A security will be excluded from the index on the day it stops trading but may reenter the index when it resumes trading.
• Shares outstanding may be adjusted to reflect corporate events during the month; otherwise, shares outstanding are updated once a month.