market folly

Ken Griffin's Citadel Advisors just filed a 13G with the SEC regarding shares of LSI Corporation (LSI).  Per the filing, Citadel has disclosed a 5.5% ownership stake with 30,389,218 shares.

This marks an increase in their position size of 22% as they purchased over 5.4 million shares.  This disclosure was required due to portfolio activity on October 5th.  It's also worth noting that in Citadel's latest 13F, the hedge fund firm also disclosed ownership of both puts and calls on LSI at the end of Q2, though there's no way to know if they still currently hold them.

Per Google Finance, LSI "designs, develops and markets storage and networking semiconductors. The Company offers a portfolio of capabilities, including custom and standard product integrated circuits that are used in hard disk drives, solid state drives, high-speed communications systems, computer servers, storage systems and personal computers. LSI provides products for original equipment manufacturer (OEM), companies, in the server, storage and networking industries."

You can see other SEC filing activity from Citadel here.