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BLAIR WILLIAM & CO/IL

Position in CIEN — Ciena Corp

CIK 902367 CHICAGO, IL

Position in CIEN

as of Jun 30, 2026 · filed Aug 11, 2026
Position Value
$9,909,802
+$2,341,259 QoQ
Shares Held
20,201
+3.6% QoQ
Ownership
0.014%
of shares outstanding
% of Portfolio
0.03%
of 13F equity value
Holder Rank
#285
of 1,218 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority Sole 97% Shared 0% None 3%

Common Shares in CIEN Over Time

Shares Held

Position Value (USD)

Position in Communication Equipment

Technology · as of Jun 30, 2026

BLAIR WILLIAM & CO/IL holds $213,794,194 across 11 Communication Equipment names. CIEN ranks #4 (4.6% of the industry book) .

# Ticker Company Shares Value (USD) Open
4 CIEN
Ciena Corp
This page
20,201 $9,909,802

All Filings in CIEN

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26 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $9,909,802 20,201
2026-03-31 $7,568,543 19,495
2025-12-31 $4,343,667 18,573
2025-09-30 $2,696,351 18,510
2025-06-30 $1,790,886 22,020
2025-03-31 $1,330,668 22,020
2024-12-31 $1,888,718 22,270
2024-09-30 $1,371,794 22,273
2024-06-30 $1,072,968 22,270
2024-03-31 $1,126,273 22,776
2023-12-31 $1,071,823 23,813
2023-09-30 $1,125,402 23,813
2023-06-30 $1,011,814 23,813
2023-03-31 $1,250,868 23,817
2022-12-31 $1,224,794 24,025
2022-09-30 $971,532 24,030
2022-06-30 $1,226,268 26,833
2022-03-31 $1,588,566 26,201
2021-12-31 $2,018,538 26,225
2021-09-30 $1,358,618 26,458
2021-06-30 $1,514,696 26,625
2021-03-31 $1,463,595 26,747
2020-12-31 $1,421,136 26,890
2020-09-30 $1,125,092 28,347
2020-06-30 $1,468,548 27,115
2020-03-31 $430,943 10,825