Really, you're surprised? I'm not. It's a penny stock with no significant revenue to date. We won't see institutional investors until after they have contracts and the share price quickly climbs above $1.
Apparently, Sterling just bought into QTMM for 56,000 shares or $6,000. Not much, but it's a start. Only issue is that the CUSIP doesn't match. The dollar amount and quantity of shares matches, but not the CUSIP, very odd. The CUSIP belongs to Quantum Corporation (QTM), but they are trading at $5.50 a share which doesn't match up with the $6,000 invested and 56,000 shares.