CIENA CORP

Ticker: CIEN CUSIP: 171779309 Class: EQTY

GILDER GAGNON HOWE & CO LLC's Holding History (CIK: 0000902464)

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

Q4 2025

Shares 36,034 Value ($000) $8,427 Avg Close $194.00 Range $143.19 - $248.00

Q3 2025

Shares 37,891 Value ($000) $5,520 Avg Close $101.84 Range $76.89 - $146.53

Q2 2025

Shares 37,716 Value ($000) $3,067 Avg Close $71.73 Range $49.21 - $86.21

Q1 2025

Shares 27,811 Value ($000) $1,681 Avg Close $79.05 Range $58.04 - $101.44

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	36,034	$8,427	$194.00	$143.19 - $248.00
Q3 2025	37,891	$5,520	$101.84	$76.89 - $146.53
Q2 2025	37,716	$3,067	$71.73	$49.21 - $86.21
Q1 2025	27,811	$1,681	$79.05	$58.04 - $101.44