CIENA CORP

Ticker: CIEN CUSIP: 171779309 Class: EQTY

ALLIANCEBERNSTEIN L.P.'s Holding History (CIK: 0001109448)

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

Q4 2025

Shares 357,570 Value ($000) $83,625 Avg Close $194.00 Range $143.19 - $248.00

Q3 2025

Shares 254,067 Value ($000) $37,010 Avg Close $101.84 Range $76.89 - $146.53

Q2 2025

Shares 346,644 Value ($000) $28,193 Avg Close $71.73 Range $49.21 - $86.21

Q1 2025

Shares 431,517 Value ($000) $26,077 Avg Close $79.05 Range $58.04 - $101.44

Q4 2024

Shares 443,333 Value ($000) $37,599 Avg Close $71.76 Range $59.60 - $91.82

Q3 2024

Shares 437,254 Value ($000) $26,930 Avg Close $52.69 Range $44.89 - $63.06

Q2 2024

Shares 405,307 Value ($000) $19,528 Avg Close $47.46 Range $43.30 - $53.58

Q1 2024

Shares 244,435 Value ($000) $12,087 Avg Close $52.75 Range $44.22 - $63.24

Q4 2023

Shares 268,230 Value ($000) $12,073 Avg Close $44.09 Range $39.94 - $48.36

Q3 2023

Shares 2,573,252 Value ($000) $121,612 Avg Close $44.08 Range $40.10 - $50.72

Q2 2023

Shares 2,747,030 Value ($000) $116,721 Avg Close $45.54 Range $40.84 - $52.67

Q1 2023

Shares 4,309,979 Value ($000) $226,360 Avg Close $49.92 Range $45.83 - $54.25

Q4 2022

Shares 3,475,870 Value ($000) $177,200 Avg Close $45.21 Range $38.33 - $52.51

Q3 2022

Shares 4,411,891 Value ($000) $178,373 Avg Close $48.05 Range $39.44 - $56.38

Q2 2022

Shares 4,912,428 Value ($000) $224,498 Avg Close $51.84 Range $41.63 - $61.78

Q1 2022

Shares 5,253,577 Value ($000) $318,524 Avg Close $65.45 Range $53.29 - $77.38

Q4 2021

Shares 5,068,390 Value ($000) $390,114 Avg Close $61.70 Range $51.01 - $78.28

Q3 2021

Shares 3,658,567 Value ($000) $187,867 Avg Close $55.54 Range $50.34 - $58.85

Q2 2021

Shares 3,276,838 Value ($000) $186,419 Avg Close $55.12 Range $49.51 - $61.09

Q1 2021

Shares 2,557,642 Value ($000) $139,954 Avg Close $53.81 Range $47.52 - $57.57

Q4 2020

Shares 2,624,648 Value ($000) $138,713 Avg Close $44.43 Range $38.03 - $54.05

Q3 2020

Shares 3,393,017 Value ($000) $134,669 Avg Close $52.62 Range $38.20 - $61.52

Q2 2020

Shares 3,540,006 Value ($000) $191,727 Avg Close $49.71 Range $38.00 - $57.19

Q1 2020

Shares 4,255,893 Value ($000) $169,427 Avg Close $41.03 Range $30.58 - $44.61

Q4 2019

Shares 3,217,768 Value ($000) $137,367 Avg Close $38.10 Range $33.22 - $43.97

Q3 2019

Shares 4,169,767 Value ($000) $163,580 Avg Close $41.92 Range $37.94 - $46.78

Q2 2019

Shares 2,133,139 Value ($000) $87,736 Avg Close $38.48 Range $32.76 - $46.23

Q1 2019

Shares 3,214,231 Value ($000) $120,019 Avg Close $38.83 Range $32.85 - $45.70

Q4 2018

Shares 2,844,787 Value ($000) $96,467 Avg Close $31.69 Range $28.23 - $36.55

Q3 2018

Shares 4,588,525 Value ($000) $143,346 Avg Close $28.02 Range $25.19 - $32.33

Q2 2018

Shares 3,019,648 Value ($000) $80,051 Avg Close $25.40 Range $22.99 - $27.10

Q1 2018

Shares 4,573,827 Value ($000) $118,462 Avg Close $23.53 Range $20.71 - $27.73

Q4 2017

Shares 2,526,760 Value ($000) $52,885 Avg Close $21.20 Range $19.40 - $22.63

Q3 2017

Shares 3,420,515 Value ($000) $75,149 Avg Close $23.93 Range $20.86 - $26.92

Q2 2017

Shares 658,416 Value ($000) $16,474 Avg Close $23.96 Range $21.43 - $27.98

Q1 2017

Shares 657,053 Value ($000) $15,513 Avg Close $24.52 Range $22.73 - $26.84

Q4 2016

Shares 215,377 Value ($000) $5,257 Avg Close $21.85 Range $18.94 - $25.19

Q3 2016

Shares 222,878 Value ($000) $4,859 Avg Close $20.85 Range $17.59 - $23.60

Q2 2016

Shares 222,628 Value ($000) $4,174 Avg Close $18.11 Range $15.62 - $21.87

Q1 2016

Shares 4,811,446 Value ($000) $91,514 Avg Close $18.47 Range $16.32 - $21.14

Q4 2015

Shares 5,482,413 Value ($000) $113,431 Avg Close $22.97 Range $18.98 - $25.46

Q3 2015

Shares 3,611,145 Value ($000) $74,823 Avg Close $23.24 Range $17.97 - $26.50

Q2 2015

Shares 198,790 Value ($000) $4,707 Avg Close $22.84 Range $18.75 - $26.20

Q1 2015

Shares 222,992 Value ($000) $4,306 Avg Close $19.93 Range $17.86 - $21.47

Q4 2014

Shares 227,242 Value ($000) $4,411 Avg Close $16.70 Range $13.77 - $20.14

Q3 2014

Shares 227,592 Value ($000) $3,805 Avg Close $19.60 Range $16.66 - $22.46

Q2 2014

Shares 244,979 Value ($000) $5,306 Avg Close $20.54 Range $18.00 - $24.21

Q1 2014

Shares 242,909 Value ($000) $5,524 Avg Close $23.52 Range $21.41 - $27.16

Q4 2013

Shares 3,857,251 Value ($000) $92,304 Avg Close $23.81 Range $20.93 - $27.94

Q3 2013

Shares 5,112,297 Value ($000) $127,705 Avg Close $22.53 Range $19.37 - $26.17

Q2 2013

Shares 5,626,668 Value ($000) $109,270 Avg Close $16.65 Range $14.14 - $20.60

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	357,570	$83,625	$194.00	$143.19 - $248.00
Q3 2025	254,067	$37,010	$101.84	$76.89 - $146.53
Q2 2025	346,644	$28,193	$71.73	$49.21 - $86.21
Q1 2025	431,517	$26,077	$79.05	$58.04 - $101.44
Q4 2024	443,333	$37,599	$71.76	$59.60 - $91.82
Q3 2024	437,254	$26,930	$52.69	$44.89 - $63.06
Q2 2024	405,307	$19,528	$47.46	$43.30 - $53.58
Q1 2024	244,435	$12,087	$52.75	$44.22 - $63.24
Q4 2023	268,230	$12,073	$44.09	$39.94 - $48.36
Q3 2023	2,573,252	$121,612	$44.08	$40.10 - $50.72
Q2 2023	2,747,030	$116,721	$45.54	$40.84 - $52.67
Q1 2023	4,309,979	$226,360	$49.92	$45.83 - $54.25
Q4 2022	3,475,870	$177,200	$45.21	$38.33 - $52.51
Q3 2022	4,411,891	$178,373	$48.05	$39.44 - $56.38
Q2 2022	4,912,428	$224,498	$51.84	$41.63 - $61.78
Q1 2022	5,253,577	$318,524	$65.45	$53.29 - $77.38
Q4 2021	5,068,390	$390,114	$61.70	$51.01 - $78.28
Q3 2021	3,658,567	$187,867	$55.54	$50.34 - $58.85
Q2 2021	3,276,838	$186,419	$55.12	$49.51 - $61.09
Q1 2021	2,557,642	$139,954	$53.81	$47.52 - $57.57
Q4 2020	2,624,648	$138,713	$44.43	$38.03 - $54.05
Q3 2020	3,393,017	$134,669	$52.62	$38.20 - $61.52
Q2 2020	3,540,006	$191,727	$49.71	$38.00 - $57.19
Q1 2020	4,255,893	$169,427	$41.03	$30.58 - $44.61
Q4 2019	3,217,768	$137,367	$38.10	$33.22 - $43.97
Q3 2019	4,169,767	$163,580	$41.92	$37.94 - $46.78
Q2 2019	2,133,139	$87,736	$38.48	$32.76 - $46.23
Q1 2019	3,214,231	$120,019	$38.83	$32.85 - $45.70
Q4 2018	2,844,787	$96,467	$31.69	$28.23 - $36.55
Q3 2018	4,588,525	$143,346	$28.02	$25.19 - $32.33
Q2 2018	3,019,648	$80,051	$25.40	$22.99 - $27.10
Q1 2018	4,573,827	$118,462	$23.53	$20.71 - $27.73
Q4 2017	2,526,760	$52,885	$21.20	$19.40 - $22.63
Q3 2017	3,420,515	$75,149	$23.93	$20.86 - $26.92
Q2 2017	658,416	$16,474	$23.96	$21.43 - $27.98
Q1 2017	657,053	$15,513	$24.52	$22.73 - $26.84
Q4 2016	215,377	$5,257	$21.85	$18.94 - $25.19
Q3 2016	222,878	$4,859	$20.85	$17.59 - $23.60
Q2 2016	222,628	$4,174	$18.11	$15.62 - $21.87
Q1 2016	4,811,446	$91,514	$18.47	$16.32 - $21.14
Q4 2015	5,482,413	$113,431	$22.97	$18.98 - $25.46
Q3 2015	3,611,145	$74,823	$23.24	$17.97 - $26.50
Q2 2015	198,790	$4,707	$22.84	$18.75 - $26.20
Q1 2015	222,992	$4,306	$19.93	$17.86 - $21.47
Q4 2014	227,242	$4,411	$16.70	$13.77 - $20.14
Q3 2014	227,592	$3,805	$19.60	$16.66 - $22.46
Q2 2014	244,979	$5,306	$20.54	$18.00 - $24.21
Q1 2014	242,909	$5,524	$23.52	$21.41 - $27.16
Q4 2013	3,857,251	$92,304	$23.81	$20.93 - $27.94
Q3 2013	5,112,297	$127,705	$22.53	$19.37 - $26.17
Q2 2013	5,626,668	$109,270	$16.65	$14.14 - $20.60