CIENA CORP

Ticker: CIEN CUSIP: 171779309 Class: EQTY

12th Street Asset Management Company, LLC's Holding History (CIK: 0001633703)

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

Q4 2025

Shares 179,584 Value ($000) $41,999 Avg Close $194.00 Range $143.19 - $248.00

Q3 2025

Shares 184,952 Value ($000) $26,942 Avg Close $101.84 Range $76.89 - $146.53

Q2 2025

Shares 378,108 Value ($000) $30,752 Avg Close $71.73 Range $49.21 - $86.21

Q1 2025

Shares 309,555 Value ($000) $18,706 Avg Close $79.05 Range $58.04 - $101.44

Q4 2024

Shares 309,133 Value ($000) $26,218 Avg Close $71.76 Range $59.60 - $91.82

Q3 2024

Shares 239,257 Value ($000) $14,736 Avg Close $52.69 Range $44.89 - $63.06

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	179,584	$41,999	$194.00	$143.19 - $248.00
Q3 2025	184,952	$26,942	$101.84	$76.89 - $146.53
Q2 2025	378,108	$30,752	$71.73	$49.21 - $86.21
Q1 2025	309,555	$18,706	$79.05	$58.04 - $101.44
Q4 2024	309,133	$26,218	$71.76	$59.60 - $91.82
Q3 2024	239,257	$14,736	$52.69	$44.89 - $63.06