Battery maker Monbat [BUL:5MB] saw the biggest share price increase among SOFIX members, of 4.05%.
Eurohold Bulgaria [BUL:4EH] and heavyweight drug maker Sopharma [BUL:3JR] followed with gains of 3.25% and 2%, respectively.
The wider BGBX40 index, which tracks the 40 most traded shares on the Sofia bourse, edged down 0.07% to 97.20 points, while the BGTR30 index, in which companies with a free float of at least 10% have equal weight, slid 0.17% to 481.50 points.
The BGREIT index, which tracks seven real estate investment trusts, lost a slim 0.01% to 131.76 points.
Total daily regulated market turnover amounted to 224,000 levs ($136,000/115,000 euro).
(1 euro = 1.95583 levs)