Sigma Labs Inc (SASI)

[MDuffy]

Your capital gain is assessed based on the difference between the price you paid for, and sold, that specific lot [so, if you sell the shares from July, it will be a pretty hefty gain]. [...One of the reasons I'm still holding, actually.] If you hold for less than one year, it's taxed as regular income, so rates may vary depending on your bracket/ whether that bumps you up one. It will be higher than a long term gain. If you hold out for long term [more than one year] it's 0%, 15%, or 20% depending on your tax bracket.

http://taxes.about.com/od/capitalgains/a/CapitalGainsTax.htm