CIENA CORP

Ticker: CIEN CUSIP: 171779309 Class: EQTY

PRICE T ROWE ASSOCIATES INC /MD/'s Holding History (CIK: 0000080255)

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

Q4 2025

Shares 4,051,625 Value ($000) $948 Avg Close $194.00 Range $143.19 - $248.00

Q3 2025

Shares 2,647,493 Value ($000) $386 Avg Close $101.84 Range $76.89 - $146.53

Q2 2025

Shares 262,223 Value ($000) $21 Avg Close $71.73 Range $49.21 - $86.21

Q1 2025

Shares 1,169,949 Value ($000) $71 Avg Close $79.05 Range $58.04 - $101.44

Q4 2024

Shares 4,626,153 Value ($000) $392 Avg Close $71.76 Range $59.60 - $91.82

Q3 2024

Shares 1,563,270 Value ($000) $96 Avg Close $52.69 Range $44.89 - $63.06

Q2 2024

Shares 1,307,726 Value ($000) $63 Avg Close $47.46 Range $43.30 - $53.58

Q1 2024

Shares 2,062,394 Value ($000) $102 Avg Close $52.75 Range $44.22 - $63.24

Q4 2023

Shares 100,881 Value ($000) $5 Avg Close $44.09 Range $39.94 - $48.36

Q3 2023

Shares 95,778 Value ($000) $5 Avg Close $44.08 Range $40.10 - $50.72

Q2 2023

Shares 90,558 Value ($000) $4 Avg Close $45.54 Range $40.84 - $52.67

Q1 2023

Shares 103,351 Value ($000) $5 Avg Close $49.92 Range $45.83 - $54.25

Q4 2022

Shares 100,625 Value ($000) $5 Avg Close $45.21 Range $38.33 - $52.51

Q3 2022

Shares 122,582 Value ($000) $4,957 Avg Close $48.05 Range $39.44 - $56.38

Q2 2022

Shares 122,016 Value ($000) $5,576 Avg Close $51.84 Range $41.63 - $61.78

Q1 2022

Shares 113,103 Value ($000) $6,857 Avg Close $65.45 Range $53.29 - $77.38

Q4 2021

Shares 109,341 Value ($000) $8,416 Avg Close $61.70 Range $51.01 - $78.28

Q3 2021

Shares 88,046 Value ($000) $4,521 Avg Close $55.54 Range $50.34 - $58.85

Q2 2021

Shares 89,091 Value ($000) $5,068 Avg Close $55.12 Range $49.51 - $61.09

Q1 2021

Shares 92,013 Value ($000) $5,035 Avg Close $53.81 Range $47.52 - $57.57

Q4 2020

Shares 83,614 Value ($000) $4,419 Avg Close $44.43 Range $38.03 - $54.05

Q3 2020

Shares 91,566 Value ($000) $3,634 Avg Close $52.62 Range $38.20 - $61.52

Q2 2020

Shares 89,755 Value ($000) $4,861 Avg Close $49.71 Range $38.00 - $57.19

Q1 2020

Shares 88,674 Value ($000) $3,530 Avg Close $41.03 Range $30.58 - $44.61

Q4 2019

Shares 76,366 Value ($000) $3,260 Avg Close $38.10 Range $33.22 - $43.97

Q3 2019

Shares 58,885 Value ($000) $2,310 Avg Close $41.92 Range $37.94 - $46.78

Q2 2019

Shares 58,362 Value ($000) $2,400 Avg Close $38.48 Range $32.76 - $46.23

Q1 2019

Shares 58,210 Value ($000) $2,174 Avg Close $38.83 Range $32.85 - $45.70

Q4 2018

Shares 55,908 Value ($000) $1,896 Avg Close $31.69 Range $28.23 - $36.55

Q3 2018

Shares 55,455 Value ($000) $1,732 Avg Close $28.02 Range $25.19 - $32.33

Q2 2018

Shares 55,182 Value ($000) $1,463 Avg Close $25.40 Range $22.99 - $27.10

Q1 2018

Shares 54,902 Value ($000) $1,422 Avg Close $23.53 Range $20.71 - $27.73

Q4 2017

Shares 58,307 Value ($000) $1,220 Avg Close $21.20 Range $19.40 - $22.63

Q3 2017

Shares 2,163,661 Value ($000) $47,536 Avg Close $23.93 Range $20.86 - $26.92

Q2 2017

Shares 2,556,511 Value ($000) $63,964 Avg Close $23.96 Range $21.43 - $27.98

Q1 2017

Shares 2,585,954 Value ($000) $61,054 Avg Close $24.52 Range $22.73 - $26.84

Q4 2016

Shares 2,747,654 Value ($000) $67,070 Avg Close $21.85 Range $18.94 - $25.19

Q3 2016

Shares 2,768,584 Value ($000) $60,355 Avg Close $20.85 Range $17.59 - $23.60

Q2 2016

Shares 3,332,943 Value ($000) $62,493 Avg Close $18.11 Range $15.62 - $21.87

Q1 2016

Shares 2,788,245 Value ($000) $53,032 Avg Close $18.47 Range $16.32 - $21.14

Q4 2015

Shares 1,811,735 Value ($000) $37,485 Avg Close $22.97 Range $18.98 - $25.46

Q3 2015

Shares 1,767,295 Value ($000) $36,618 Avg Close $23.24 Range $17.97 - $26.50

Q2 2015

Shares 1,780,695 Value ($000) $42,167 Avg Close $22.84 Range $18.75 - $26.20

Q1 2015

Shares 1,682,075 Value ($000) $32,481 Avg Close $19.93 Range $17.86 - $21.47

Q4 2014

Shares 1,614,565 Value ($000) $31,339 Avg Close $16.70 Range $13.77 - $20.14

Q3 2014

Shares 1,184,405 Value ($000) $19,803 Avg Close $19.60 Range $16.66 - $22.46

Q2 2014

Shares 1,176,305 Value ($000) $25,479 Avg Close $20.54 Range $18.00 - $24.21

Q1 2014

Shares 1,173,205 Value ($000) $26,679 Avg Close $23.52 Range $21.41 - $27.16

Q4 2013

Shares 1,173,405 Value ($000) $28,080 Avg Close $23.81 Range $20.93 - $27.94

Q3 2013

Shares 1,340,305 Value ($000) $33,481 Avg Close $22.53 Range $19.37 - $26.17

Q2 2013

Shares 1,336,405 Value ($000) $25,953 Avg Close $16.65 Range $14.14 - $20.60

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	4,051,625	$948	$194.00	$143.19 - $248.00
Q3 2025	2,647,493	$386	$101.84	$76.89 - $146.53
Q2 2025	262,223	$21	$71.73	$49.21 - $86.21
Q1 2025	1,169,949	$71	$79.05	$58.04 - $101.44
Q4 2024	4,626,153	$392	$71.76	$59.60 - $91.82
Q3 2024	1,563,270	$96	$52.69	$44.89 - $63.06
Q2 2024	1,307,726	$63	$47.46	$43.30 - $53.58
Q1 2024	2,062,394	$102	$52.75	$44.22 - $63.24
Q4 2023	100,881	$5	$44.09	$39.94 - $48.36
Q3 2023	95,778	$5	$44.08	$40.10 - $50.72
Q2 2023	90,558	$4	$45.54	$40.84 - $52.67
Q1 2023	103,351	$5	$49.92	$45.83 - $54.25
Q4 2022	100,625	$5	$45.21	$38.33 - $52.51
Q3 2022	122,582	$4,957	$48.05	$39.44 - $56.38
Q2 2022	122,016	$5,576	$51.84	$41.63 - $61.78
Q1 2022	113,103	$6,857	$65.45	$53.29 - $77.38
Q4 2021	109,341	$8,416	$61.70	$51.01 - $78.28
Q3 2021	88,046	$4,521	$55.54	$50.34 - $58.85
Q2 2021	89,091	$5,068	$55.12	$49.51 - $61.09
Q1 2021	92,013	$5,035	$53.81	$47.52 - $57.57
Q4 2020	83,614	$4,419	$44.43	$38.03 - $54.05
Q3 2020	91,566	$3,634	$52.62	$38.20 - $61.52
Q2 2020	89,755	$4,861	$49.71	$38.00 - $57.19
Q1 2020	88,674	$3,530	$41.03	$30.58 - $44.61
Q4 2019	76,366	$3,260	$38.10	$33.22 - $43.97
Q3 2019	58,885	$2,310	$41.92	$37.94 - $46.78
Q2 2019	58,362	$2,400	$38.48	$32.76 - $46.23
Q1 2019	58,210	$2,174	$38.83	$32.85 - $45.70
Q4 2018	55,908	$1,896	$31.69	$28.23 - $36.55
Q3 2018	55,455	$1,732	$28.02	$25.19 - $32.33
Q2 2018	55,182	$1,463	$25.40	$22.99 - $27.10
Q1 2018	54,902	$1,422	$23.53	$20.71 - $27.73
Q4 2017	58,307	$1,220	$21.20	$19.40 - $22.63
Q3 2017	2,163,661	$47,536	$23.93	$20.86 - $26.92
Q2 2017	2,556,511	$63,964	$23.96	$21.43 - $27.98
Q1 2017	2,585,954	$61,054	$24.52	$22.73 - $26.84
Q4 2016	2,747,654	$67,070	$21.85	$18.94 - $25.19
Q3 2016	2,768,584	$60,355	$20.85	$17.59 - $23.60
Q2 2016	3,332,943	$62,493	$18.11	$15.62 - $21.87
Q1 2016	2,788,245	$53,032	$18.47	$16.32 - $21.14
Q4 2015	1,811,735	$37,485	$22.97	$18.98 - $25.46
Q3 2015	1,767,295	$36,618	$23.24	$17.97 - $26.50
Q2 2015	1,780,695	$42,167	$22.84	$18.75 - $26.20
Q1 2015	1,682,075	$32,481	$19.93	$17.86 - $21.47
Q4 2014	1,614,565	$31,339	$16.70	$13.77 - $20.14
Q3 2014	1,184,405	$19,803	$19.60	$16.66 - $22.46
Q2 2014	1,176,305	$25,479	$20.54	$18.00 - $24.21
Q1 2014	1,173,205	$26,679	$23.52	$21.41 - $27.16
Q4 2013	1,173,405	$28,080	$23.81	$20.93 - $27.94
Q3 2013	1,340,305	$33,481	$22.53	$19.37 - $26.17
Q2 2013	1,336,405	$25,953	$16.65	$14.14 - $20.60