Marimba ( MRBA) soared Thursday on heavy volume after the company agreed to be acquired by BMC Software ( BMC). Almost 12 million Marimba shares changed hands. The agreement calls for BMC to buy Marimba for about $240 million , or $8.25 per share. Shares of Marimba ended the day up $3.20, or 65.7%, to $8.07. Shares of BMC, meanwhile, traded down $1.45, or 7.4%, to $18.05. Shares of Accenture ( ACN) were active Thursday after the company priced some 50 million shares in a primary and secondary offering. An underwriting syndicate led by Morgan Stanley, UBS Investment Bank and JPMorgan placed the shares at $23.50 per share. Accenture said it plans to use the proceeds to acquire a comparable number of Accenture SCA Class I and Accenture Canada Holdings shares held by former and current partners. The new shares won't increase the number of outstanding Accenture shares. Shares of Accenture ended the day down 1 cent, or 0.04%, to $23.75, on volume of more than 16.6 million shares. Also active was Immune Response ( IMNR), which said that its NeuroVax drug showed strong results in phase I and II trials. NeuroVax is designed to help treat multiple sclerosis. Shares of Immune Response traded up 39 cents, or 23.9%, to $2.02 on volume of 14.7 million shares. Other names joining the list of Nasdaq most actives included JDS Uniphase ( JDSU), Oracle ( ORCL), Microsoft ( MSFT) and Intel ( INTC). NYSE high-volume leaders included Nortel Networks ( NT), Lucent ( LU), Time Warner ( TWX) and Texas Instruments ( TXN).