If their tax year is January-December, and this was for tax year 2010, GE stock paid 46 cents/share. There are currently 10.56 billion shares outstanding, so that's about $4,857,600,000 paid in dividends.
During that period, GE opened at $14.66, and closed at $17.84/share. So, there was certainly a potential for capital gain, but sales during that period could have been for shares purchased at any time. Total volume for calendar year 2010 was about 905 million shares, so it's probably safe to presume that some of those were profitable. :-)