X0306 4 2020-11-16 0 0001470205 County Bancorp, Inc. ICBK 0001630321 MILLER MARK ANDREW 2400 S. 44TH STREET MANITOWOC WI 54220 0 1 0 0 SECRETARY COMMON STOCK 2020-11-16 4 S 0 2000 20.2274 D 13841 I BY SPOUSE COMMON STOCK 29298 D The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 4, 2020. The price reported in column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $20.11 to $20.94, inclusive. The reporting person undertakes to provide to County Bancorp, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote to this Form 4. /s/ Mark A. Miller 2020-11-17