Equities Intraday Price

Sourcesort descending Coverage Frequency Geography Notes
Bloomberg Rolling 140 days I Global

Every minute.

For Excel add-in i.e. this formula returns 1 minute intraday time bars for IBM trades on 9/10/08 from 9:30am -10am (=BDH("IBM Equity", "LAST PRICE", "9/10/08 9:30", "9/10/08 14:00", "BARTP=T", "BARSZ=1")

TAQ Latest and Historical I
Thomson ONE (IE Browser only) Varies I Global

Every 5, 10, 15 minutes. Available only through excel addin.