CIENA CORP

Ticker: CIEN CUSIP: 171779309 Class: EQTY

OSTRUM ASSET MANAGEMENT's Holding History (CIK: 0001767945)

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

Q4 2025

Shares 2,681 Value ($000) $627 Avg Close $194.00 Range $143.19 - $248.00

Q3 2025

Shares 5,050 Value ($000) $736 Avg Close $101.84 Range $76.89 - $146.53

Q2 2025

Shares 10,090 Value ($000) $821 Avg Close $71.73 Range $49.21 - $86.21

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	2,681	$627	$194.00	$143.19 - $248.00
Q3 2025	5,050	$736	$101.84	$76.89 - $146.53
Q2 2025	10,090	$821	$71.73	$49.21 - $86.21