This excerpt taken from the C 10-K filed Feb 22, 2008.
Unregistered Sales of Equity Securities
On October 3, 2007, Citigroup issued 11,171,938 shares of its common stock to the former stockholders of Automated Trading Desk, Inc. (ATD) as partial consideration of Citigroups acquisition of ATD. The balance of the purchase price was paid in cash. The issuance was made in reliance upon the exemption from the registration requirements of the Securities Act of 1933 provided by Section 4(2) thereof.
This excerpt taken from the C 8-K filed Jan 15, 2008.
Item 3.02 Unregistered Sales of Equity Securities.
(a) On January 15, 2008, Citigroup Inc. (Citigroup) announced it has raised a total of $12.5 billion of capital through the sale of convertible preferred securities in a private offering which has been completed, subject to settlement.