WORKIVA INC

Ticker: WK CUSIP: 98139A105 Class: Common Stock

Iowa State Bank's Holding History (CIK: 0001546967)

Note: Option positions (PUT/CALL) are excluded.

Q1 2019

Shares 7,890 Value ($000) $400 Avg Close $43.97 Range $34.43 - $51.36

Q4 2018

Shares 10,890 Value ($000) $391 Avg Close $35.14 Range $31.65 - $40.84

Q3 2018

Shares 10,890 Value ($000) $430 Avg Close $31.09 Range $24.25 - $40.65

Q2 2018

Shares 11,090 Value ($000) $271 Avg Close $25.16 Range $22.00 - $27.60

Q1 2018

Shares 11,090 Value ($000) $263 Avg Close $23.00 Range $20.50 - $26.75

Q4 2017

Shares 11,090 Value ($000) $237 Avg Close $21.99 Range $20.60 - $23.70

Q3 2017

Shares 16,160 Value ($000) $337 Avg Close $19.81 Range $18.35 - $21.05

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2019	7,890	$400	$43.97	$34.43 - $51.36
Q4 2018	10,890	$391	$35.14	$31.65 - $40.84
Q3 2018	10,890	$430	$31.09	$24.25 - $40.65
Q2 2018	11,090	$271	$25.16	$22.00 - $27.60
Q1 2018	11,090	$263	$23.00	$20.50 - $26.75
Q4 2017	11,090	$237	$21.99	$20.60 - $23.70
Q3 2017	16,160	$337	$19.81	$18.35 - $21.05