|H.C. Wainwright||Scott Buck|
|Trickle Research||David Lavigne|
Sigma Labs, Inc. is followed by the analysts listed above. Please note that any opinions, estimates or forecasts regarding Sigma Labs, Inc.'s performance made by these analysts are theirs alone and do not represent opinions, forecasts or predictions of Sigma Labs, Inc. or its management. Sigma Labs, Inc. does not by its reference above or distribution imply its endorsement of or concurrence with such information, conclusions or recommendations.