CIENA CORP

Ticker: CIEN CUSIP: 171779309 Class: EQTY

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC's Holding History (CIK: 0001644956)

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

Q4 2025
Shares 1,098,593 Value ($000) $256,928 Avg Close $194.00 Range $143.19 - $248.00
Q3 2025
Shares 2,440,888 Value ($000) $355,564 Avg Close $101.84 Range $76.89 - $146.53
Q2 2025
Shares 2,708,540 Value ($000) $220,286 Avg Close $71.73 Range $49.21 - $86.21
Q1 2025
Shares 2,005,631 Value ($000) $121,200 Avg Close $79.05 Range $58.04 - $101.44
Q1 2019
Shares 472,534 Value ($000) $17,644 Avg Close $38.83 Range $32.85 - $45.70
Q4 2018
Shares 520,914 Value ($000) $17,664 Avg Close $31.69 Range $28.23 - $36.55
Q3 2018
Shares 513,278 Value ($000) $16,035 Avg Close $28.02 Range $25.19 - $32.33
Q2 2018
Shares 554,046 Value ($000) $14,688 Avg Close $25.40 Range $22.99 - $27.10