GENTEX CORP

Ticker: GNTX CUSIP: 371901109 Class: COM

Robeco Schweiz AG's Holding History (CIK: 0001418427)

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

Q3 2018

Shares 377,500 Value ($000) $8,037 Avg Close $23.14 Range $21.11 - $24.94

Q2 2018

Shares 350,000 Value ($000) $8,099 Avg Close $23.73 Range $21.82 - $25.41

Q1 2018

Shares 350,000 Value ($000) $8,057 Avg Close $22.76 Range $20.78 - $24.07

Q2 2013

Shares 70,000 Value ($000) $1,614 Avg Close $11.27 Range $9.51 - $12.70

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2018	377,500	$8,037	$23.14	$21.11 - $24.94
Q2 2018	350,000	$8,099	$23.73	$21.82 - $25.41
Q1 2018	350,000	$8,057	$22.76	$20.78 - $24.07
Q2 2013	70,000	$1,614	$11.27	$9.51 - $12.70