CIENA CORP

Ticker: CIEN CUSIP: 171779309 Class: EQTY

ESSEX INVESTMENT MANAGEMENT CO LLC's Holding History (CIK: 0000201772)

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

Q1 2023

Shares 25,020 Value ($000) $1,314 Avg Close $49.92 Range $45.83 - $54.25

Q1 2022

Shares 118,536 Value ($000) $7,187 Avg Close $65.45 Range $53.29 - $77.38

Q4 2021

Shares 120,717 Value ($000) $9,292 Avg Close $61.70 Range $51.01 - $78.28

Q3 2021

Shares 121,565 Value ($000) $6,242 Avg Close $55.54 Range $50.34 - $58.85

Q2 2021

Shares 104,495 Value ($000) $5,945 Avg Close $55.12 Range $49.51 - $61.09

Q1 2021

Shares 54,303 Value ($000) $2,971 Avg Close $53.81 Range $47.52 - $57.57

Q4 2020

Shares 55,649 Value ($000) $2,941 Avg Close $44.43 Range $38.03 - $54.05

Q3 2020

Shares 55,802 Value ($000) $2,215 Avg Close $52.62 Range $38.20 - $61.52

Q2 2020

Shares 91,244 Value ($000) $4,942 Avg Close $49.71 Range $38.00 - $57.19

Q1 2020

Shares 93,197 Value ($000) $3,710 Avg Close $41.03 Range $30.58 - $44.61

Q4 2019

Shares 156,114 Value ($000) $6,665 Avg Close $38.10 Range $33.22 - $43.97

Q3 2019

Shares 223,549 Value ($000) $8,770 Avg Close $41.92 Range $37.94 - $46.78

Q2 2019

Shares 220,342 Value ($000) $9,063 Avg Close $38.48 Range $32.76 - $46.23

Q1 2019

Shares 206,354 Value ($000) $7,705 Avg Close $38.83 Range $32.85 - $45.70

Q4 2018

Shares 225,568 Value ($000) $7,649 Avg Close $31.69 Range $28.23 - $36.55

Q3 2018

Shares 31,064 Value ($000) $970 Avg Close $28.02 Range $25.19 - $32.33

Q2 2018

Shares 10,555 Value ($000) $280 Avg Close $25.40 Range $22.99 - $27.10

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2023	25,020	$1,314	$49.92	$45.83 - $54.25
Q1 2022	118,536	$7,187	$65.45	$53.29 - $77.38
Q4 2021	120,717	$9,292	$61.70	$51.01 - $78.28
Q3 2021	121,565	$6,242	$55.54	$50.34 - $58.85
Q2 2021	104,495	$5,945	$55.12	$49.51 - $61.09
Q1 2021	54,303	$2,971	$53.81	$47.52 - $57.57
Q4 2020	55,649	$2,941	$44.43	$38.03 - $54.05
Q3 2020	55,802	$2,215	$52.62	$38.20 - $61.52
Q2 2020	91,244	$4,942	$49.71	$38.00 - $57.19
Q1 2020	93,197	$3,710	$41.03	$30.58 - $44.61
Q4 2019	156,114	$6,665	$38.10	$33.22 - $43.97
Q3 2019	223,549	$8,770	$41.92	$37.94 - $46.78
Q2 2019	220,342	$9,063	$38.48	$32.76 - $46.23
Q1 2019	206,354	$7,705	$38.83	$32.85 - $45.70
Q4 2018	225,568	$7,649	$31.69	$28.23 - $36.55
Q3 2018	31,064	$970	$28.02	$25.19 - $32.33
Q2 2018	10,555	$280	$25.40	$22.99 - $27.10