South Florida Business Journal -- Bioheart narrowed its losses in the third quarter, and then completed a nearly $3.9 million private stock offering. The Sunrise-based biotechnology company (OTCBB: BHRT) had a net loss of $2.2 million, or 13 cents a share, in the third quarter, improved from a net loss of $4.4 million, or 30 cents a share, in the same period last year, according to its quarterly Securities and Exchange Commission filing.