Interesting. I just looked up AAOI and the chart is similar to POET's. And even though the shares are currently mid $2, there are plenty of institutional owners. AAOI's price was beaten down from above $8 down to below $2 within this past year. I wonder when this roster of institutions did their accumulation?
https://finance.yahoo.com/quote/AAOI/holders?p=AAOI