Use Bloomberg, available on select computers in the Business Library.

• For specific insider holdings, type the ticker symbol of the equity you want, hit the yellow <EQUITY> key and hit <GO>.
• Choose Company Info, then Management Profile.
• Choose a person and then choose Reported Holdings.
• To access the Holdings Menu on Bloomberg, type the ticker, hit the <EQUITY> key. Then, type PHDC and hit <GO>. Choose Insiders only.

For a ranking of CEOs by the number of shares they hold in their companies*:

• Type WEH and hit <GO>.

*Only for companies in the S&P 500, FTSE 350, and the Nikkei 225.

For stocks that have experienced the most purchases and sales by insiders:

• Type INSD and hit <GO>.
• Use the fields at the top of the screen to select country, time period, and type of transaction.
• Click on a stock to display a graph of its historical prices with date of insider transactions.

For historical insider information, look at the Official Summary of Security Transactions and Holdings (SEC), which covers the years 1976-1999.  This is a print source; sign in with your HawkID and password to request issues.