A number of large banks that are investors in financial data provider Markit plan to sell portions of their stakes through a proposed secondary offering at the first opportunity, taking advantage of the end of a post-initial public offering lockup period.

Bank of America Merrill Lynch, Goldman Sachs, Morgan Stanley, Citigroup, Barclays, Credit Suisse, Deutsche Bank, HSBC, BNP Paribas, RBS, or entities controlled by those banks, have expressed interest in selling shares in the company later this year, the firm disclosed in a regulatory filing Wednesday.