PHOT is a negative-growth stock with sharply-declining revenue and a possible SEC investigation still weighing heavily.
PHOT has been in business for a long time, yet has never made money....ever.
It behaves like a typical penny stock that uses toxic financing to stay afloat a little longer.
They have also signaled that acquisition of another co may happen. The acquirer would likely have to come up with cash and/or a huge number of dilutive shares.
Penny stock investors understand that a company that does business like this often dilutes existing shareholders into the ground, all while making sure management gets pad huge salaries and bonuses for failure.
So....I'm not sure it is being held down. It may actually be being propped-up by unscrupulous traders taking advantage that it has no MM's and is listed as unsolicited quotes only, making it ripe for fraud and manipulation.