CIENA CORP

Ticker: CIEN CUSIP: 171779309 Class: EQTY

Douglass Winthrop Advisors, LLC's Holding History (CIK: 0001308527)

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

Q4 2019

Shares 21,450 Value ($000) $916 Avg Close $38.10 Range $33.22 - $43.97

Q3 2019

Shares 21,450 Value ($000) $841 Avg Close $41.92 Range $37.94 - $46.78

Q2 2019

Shares 21,450 Value ($000) $882 Avg Close $38.48 Range $32.76 - $46.23

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2019	21,450	$916	$38.10	$33.22 - $43.97
Q3 2019	21,450	$841	$41.92	$37.94 - $46.78
Q2 2019	21,450	$882	$38.48	$32.76 - $46.23