AMPG ▼ -18.8% - AmpliTech Group, Inc. $AMPG AMPGW AMPGZ AMPGR - AmpliTech Group Reports Q3 2026 Revenue of $6.58 Million, Up 8.0% Year-over-Year, and 41.1% Nine-Month Gross Profit Growth 12-NOV-2026 04:05 PM ET