Use PitchBook.

• To screen for companies:
  • Under Screeners, scroll over Companies & Deals and select IPOs.
  • Add any additional criteria and Search.
• From a company profile, look under Deal History.

Use S&P Capital IQ (see access details).

• Go to the Screening tab and select Transactions
• Under General Transaction Details select Primary Features and choose Public Offering - IPO
• Click the Add Criteria button. Add additional criteria as needed.
• Click View Results.

Use Bloomberg (see access details).

• To find the IPO date of a specific company, type the company's ticker followed by IPO <GO>
• To find IPO and Additional Offering dates for a specific company:
  • Type CACT to perform a Corporate Action Search.
  • Change left dropdown from All Securities to Single Security.
  • Enter company's ticker in field to the right.
  • Adjust dates, hit Enter key, then Filter Actions to IPO/ADDL.
  • Click on an action to access details about the offering. 
• Use CACT to screen for companies by IPO/Additional Offering date:
  • Type CACT in the command line.
  • Leave left dropdown reflecting All Securities.
  • Adjust date.
  • Filter Actions to IPO/ADDL.

See also: Where can I find general information on IPOs?