"GTEM.PK never has had a meaningful Institutional base"
That is true. If one takes the time to check you will find that the "Institutional holdings" of this company have always, with justification, been sparse and most of the time those institutions who "chose" to hold shares were of questionable value/stature.
The primary reason that the number of institutions holding shares in this company increased so drastically was that, due to the infamous "Reverse Split", the share value increased to a point where it, the company, was listed on one of the indexes. Many institutions have no choice but to purchase shares of companys listed on these indexes.
For the most part institutions did not "choose" to purchase shares of GTE/GTEM but rather, were forced to do so.
I believe that the so called institutional holdings of this company have fallen to less than a paltry 2% and those institutions still holding/stuck with shares are probably on a list of institutions that no one has ever heard of.