CIENA CORP

Ticker: CIEN CUSIP: 171779309 Class: EQTY

AMERICAN CENTURY COMPANIES INC's Holding History (CIK: 0000748054)

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

Q4 2025

Shares 252,751 Value ($000) $59,111 Avg Close $194.00 Range $143.19 - $248.00

Q3 2025

Shares 585,747 Value ($000) $85,326 Avg Close $101.84 Range $76.89 - $146.53

Q2 2025

Shares 478,756 Value ($000) $38,937 Avg Close $71.73 Range $49.21 - $86.21

Q1 2025

Shares 48,976 Value ($000) $2,960 Avg Close $79.05 Range $58.04 - $101.44

Q4 2024

Shares 44,711 Value ($000) $3,792 Avg Close $71.76 Range $59.60 - $91.82

Q3 2024

Shares 44,042 Value ($000) $2,713 Avg Close $52.69 Range $44.89 - $63.06

Q2 2024

Shares 43,191 Value ($000) $2,081 Avg Close $47.46 Range $43.30 - $53.58

Q1 2024

Shares 320,565 Value ($000) $15,852 Avg Close $52.75 Range $44.22 - $63.24

Q4 2023

Shares 447,821 Value ($000) $20,156 Avg Close $44.09 Range $39.94 - $48.36

Q3 2023

Shares 415,561 Value ($000) $19,639 Avg Close $44.08 Range $40.10 - $50.72

Q2 2023

Shares 603,687 Value ($000) $25,651 Avg Close $45.54 Range $40.84 - $52.67

Q1 2023

Shares 556,351 Value ($000) $29,187 Avg Close $49.92 Range $45.83 - $54.25

Q4 2022

Shares 433,526 Value ($000) $22,101 Avg Close $45.21 Range $38.33 - $52.51

Q3 2022

Shares 19,509 Value ($000) $789 Avg Close $48.05 Range $39.44 - $56.38

Q2 2022

Shares 19,514 Value ($000) $892 Avg Close $51.84 Range $41.63 - $61.78

Q1 2022

Shares 17,204 Value ($000) $1,043 Avg Close $65.45 Range $53.29 - $77.38

Q4 2021

Shares 15,496 Value ($000) $1,193 Avg Close $61.70 Range $51.01 - $78.28

Q3 2021

Shares 13,411 Value ($000) $689 Avg Close $55.54 Range $50.34 - $58.85

Q2 2021

Shares 11,679 Value ($000) $664 Avg Close $55.12 Range $49.51 - $61.09

Q1 2021

Shares 9,524 Value ($000) $521 Avg Close $53.81 Range $47.52 - $57.57

Q4 2020

Shares 22,417 Value ($000) $1,185 Avg Close $44.43 Range $38.03 - $54.05

Q3 2020

Shares 58,024 Value ($000) $2,303 Avg Close $52.62 Range $38.20 - $61.52

Q2 2020

Shares 48,592 Value ($000) $2,632 Avg Close $49.71 Range $38.00 - $57.19

Q1 2020

Shares 50,727 Value ($000) $2,019 Avg Close $41.03 Range $30.58 - $44.61

Q4 2019

Shares 91,056 Value ($000) $3,887 Avg Close $38.10 Range $33.22 - $43.97

Q3 2019

Shares 277,350 Value ($000) $10,880 Avg Close $41.92 Range $37.94 - $46.78

Q2 2019

Shares 323,869 Value ($000) $13,321 Avg Close $38.48 Range $32.76 - $46.23

Q1 2019

Shares 392,881 Value ($000) $14,670 Avg Close $38.83 Range $32.85 - $45.70

Q4 2018

Shares 317,303 Value ($000) $10,760 Avg Close $31.69 Range $28.23 - $36.55

Q3 2018

Shares 140,538 Value ($000) $4,390 Avg Close $28.02 Range $25.19 - $32.33

Q2 2018

Shares 312,218 Value ($000) $8,277 Avg Close $25.40 Range $22.99 - $27.10

Q1 2018

Shares 473,123 Value ($000) $12,254 Avg Close $23.53 Range $20.71 - $27.73

Q4 2017

Shares 457,545 Value ($000) $9,576 Avg Close $21.20 Range $19.40 - $22.63

Q3 2017

Shares 475,788 Value ($000) $10,453 Avg Close $23.93 Range $20.86 - $26.92

Q2 2017

Shares 635,473 Value ($000) $15,900 Avg Close $23.96 Range $21.43 - $27.98

Q1 2017

Shares 700,122 Value ($000) $16,530 Avg Close $24.52 Range $22.73 - $26.84

Q4 2016

Shares 752,248 Value ($000) $18,362 Avg Close $21.85 Range $18.94 - $25.19

Q3 2016

Shares 1,048,862 Value ($000) $22,865 Avg Close $20.85 Range $17.59 - $23.60

Q2 2016

Shares 1,318,831 Value ($000) $24,728 Avg Close $18.11 Range $15.62 - $21.87

Q1 2016

Shares 760,586 Value ($000) $14,466 Avg Close $18.47 Range $16.32 - $21.14

Q4 2015

Shares 532,463 Value ($000) $11,017 Avg Close $22.97 Range $18.98 - $25.46

Q3 2015

Shares 150,295 Value ($000) $3,114 Avg Close $23.24 Range $17.97 - $26.50

Q2 2015

Shares 17,557 Value ($000) $416 Avg Close $22.84 Range $18.75 - $26.20

Q1 2015

Shares 22,390 Value ($000) $434 Avg Close $19.93 Range $17.86 - $21.47

Q4 2014

Shares 153,669 Value ($000) $2,983 Avg Close $16.70 Range $13.77 - $20.14

Q3 2014

Shares 2,152,228 Value ($000) $35,985 Avg Close $19.60 Range $16.66 - $22.46

Q2 2014

Shares 3,781,513 Value ($000) $81,908 Avg Close $20.54 Range $18.00 - $24.21

Q1 2014

Shares 3,127,821 Value ($000) $71,127 Avg Close $23.52 Range $21.41 - $27.16

Q4 2013

Shares 3,964,844 Value ($000) $94,879 Avg Close $23.81 Range $20.93 - $27.94

Q3 2013

Shares 5,238,532 Value ($000) $130,859 Avg Close $22.53 Range $19.37 - $26.17

Q2 2013

Shares 188,904 Value ($000) $3,669 Avg Close $16.65 Range $14.14 - $20.60

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	252,751	$59,111	$194.00	$143.19 - $248.00
Q3 2025	585,747	$85,326	$101.84	$76.89 - $146.53
Q2 2025	478,756	$38,937	$71.73	$49.21 - $86.21
Q1 2025	48,976	$2,960	$79.05	$58.04 - $101.44
Q4 2024	44,711	$3,792	$71.76	$59.60 - $91.82
Q3 2024	44,042	$2,713	$52.69	$44.89 - $63.06
Q2 2024	43,191	$2,081	$47.46	$43.30 - $53.58
Q1 2024	320,565	$15,852	$52.75	$44.22 - $63.24
Q4 2023	447,821	$20,156	$44.09	$39.94 - $48.36
Q3 2023	415,561	$19,639	$44.08	$40.10 - $50.72
Q2 2023	603,687	$25,651	$45.54	$40.84 - $52.67
Q1 2023	556,351	$29,187	$49.92	$45.83 - $54.25
Q4 2022	433,526	$22,101	$45.21	$38.33 - $52.51
Q3 2022	19,509	$789	$48.05	$39.44 - $56.38
Q2 2022	19,514	$892	$51.84	$41.63 - $61.78
Q1 2022	17,204	$1,043	$65.45	$53.29 - $77.38
Q4 2021	15,496	$1,193	$61.70	$51.01 - $78.28
Q3 2021	13,411	$689	$55.54	$50.34 - $58.85
Q2 2021	11,679	$664	$55.12	$49.51 - $61.09
Q1 2021	9,524	$521	$53.81	$47.52 - $57.57
Q4 2020	22,417	$1,185	$44.43	$38.03 - $54.05
Q3 2020	58,024	$2,303	$52.62	$38.20 - $61.52
Q2 2020	48,592	$2,632	$49.71	$38.00 - $57.19
Q1 2020	50,727	$2,019	$41.03	$30.58 - $44.61
Q4 2019	91,056	$3,887	$38.10	$33.22 - $43.97
Q3 2019	277,350	$10,880	$41.92	$37.94 - $46.78
Q2 2019	323,869	$13,321	$38.48	$32.76 - $46.23
Q1 2019	392,881	$14,670	$38.83	$32.85 - $45.70
Q4 2018	317,303	$10,760	$31.69	$28.23 - $36.55
Q3 2018	140,538	$4,390	$28.02	$25.19 - $32.33
Q2 2018	312,218	$8,277	$25.40	$22.99 - $27.10
Q1 2018	473,123	$12,254	$23.53	$20.71 - $27.73
Q4 2017	457,545	$9,576	$21.20	$19.40 - $22.63
Q3 2017	475,788	$10,453	$23.93	$20.86 - $26.92
Q2 2017	635,473	$15,900	$23.96	$21.43 - $27.98
Q1 2017	700,122	$16,530	$24.52	$22.73 - $26.84
Q4 2016	752,248	$18,362	$21.85	$18.94 - $25.19
Q3 2016	1,048,862	$22,865	$20.85	$17.59 - $23.60
Q2 2016	1,318,831	$24,728	$18.11	$15.62 - $21.87
Q1 2016	760,586	$14,466	$18.47	$16.32 - $21.14
Q4 2015	532,463	$11,017	$22.97	$18.98 - $25.46
Q3 2015	150,295	$3,114	$23.24	$17.97 - $26.50
Q2 2015	17,557	$416	$22.84	$18.75 - $26.20
Q1 2015	22,390	$434	$19.93	$17.86 - $21.47
Q4 2014	153,669	$2,983	$16.70	$13.77 - $20.14
Q3 2014	2,152,228	$35,985	$19.60	$16.66 - $22.46
Q2 2014	3,781,513	$81,908	$20.54	$18.00 - $24.21
Q1 2014	3,127,821	$71,127	$23.52	$21.41 - $27.16
Q4 2013	3,964,844	$94,879	$23.81	$20.93 - $27.94
Q3 2013	5,238,532	$130,859	$22.53	$19.37 - $26.17
Q2 2013	188,904	$3,669	$16.65	$14.14 - $20.60