Extract from Wikipedia.
It was reported on 20 November 2009 by Reuters that Williams and Patrick Head had sold a minority interest in their team to an investment company led by Austrian Toto Wolff who has stated that it was purely a commercial decision.
In February 2011, Williams F1 announced their intention to float via an initial public offering (IPO) on the Frankfurt Stock Exchange (FW
, from March 2011. Swiss-based Bank am Bellevue AG will act as sole global co-ordinator of up to 27.39% of existing shares, a total of 2,739,383 shares. The shares will be offered to the public in the UK, Germany, Switzerland and Austria; while private institutional investment will be available to organisations in other EU countries, plus the United States, Canada, Japan and Australia. Sir Frank Williams will remain majority shareholder and team principal after the IPO. The shares are valued at between 24 and 29 euros, which values the Williams F1 team at 265 million euros.
So if this is correct then my previous statement should read.
27.39% floated on stock exchange
15.00% previously owned by toto now of Hollinger
57.61% SFW + PH (if he still has a share)