Position in CIEN
as of Jun 30, 2026
· filed Aug 12, 2026
Position Value
$65,637,418
-$89,102,907 QoQ
Shares Held
133,801
-66.4% QoQ
Ownership
0.094%
of shares outstanding
% of Portfolio
0.20%
of 13F equity value
Holder Rank
#92
of 1,227 holders
Holding Since
Mar 2025
6 quarters on record
Voting authority
Sole 98%
Shared 0%
None 2%
Common Shares in CIEN Over Time
Shares Held
Position Value (USD)
Position in Communication Equipment
Technology · as of Jun 30, 2026WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC holds $195,112,302 across 6 Communication Equipment names. CIEN ranks #2 (33.6% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | AAOI |
Applied Optoelectronics, Inc.
|
504,202 | $74,702,568 | |
| 2 | CIEN |
Ciena Corp
This page
|
133,801 | $65,637,418 | |
| 3 | BDC |
Belden Inc.
|
178,144 | $21,361,247 | |
| 4 | MSI |
Motorola Solutions, Inc.
|
42,766 | $17,760,292 | |
| 5 | ADTN |
ADTRAN Holdings, Inc.
|
1,099,019 | $15,276,364 | |
| 6 | HPE |
Hewlett Packard Enterprise Co
|
8,300 | $374,413 |
All Filings in CIEN
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6 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $65,637,418 | 133,801 | Shares | Sole | 2026-08-12 | |
| 2026-03-31 | $154,740,325 | 398,579 | Shares | Sole | 2026-05-08 | |
| 2025-12-31 | $256,927,944 | 1,098,593 | Shares | Sole | 2026-02-09 | |
| 2025-09-30 | $355,564,154 | 2,440,888 | Shares | Sole | 2025-11-12 | |
| 2025-06-30 | $220,285,558 | 2,708,540 | Shares | Sole | 2025-07-29 | |
| 2025-03-31 | $121,200,281 | 2,005,631 | Shares | Sole | 2025-05-09 | |
| No filing history on record for this holder in this stock. | ||||||