MikeCr has been around the longest, he may know. It got to .18 or close one Friday, the day the financials were to come out. But they lied to us, hence the precipitous drop imminent prison time for Mark.
The prices before 3/19/2009 are for Integrated Media Holdings a shell company that Arrayit reverse merged into to become public. Then after 3/19/2009 the prices are for the new public Arrayit.
Since the ARYC stock was greatly diluted after 2015, a better question may be what was the highest market value since 3/19/2009 and the answer to that is $222M on 3/26/2019 when the price closed at 0.1969 with 1,126,502,244 shares outstanding. As many remember that was the time that they were promising fins by 1st quarter of 2019. The market value dropped precipitously when they failed to produce the fins.
Mark was proud enough of that high market value to include it in his Linkedin page