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DIMENSIONAL FUND ADVISORS LP

Position in CIEN — Ciena Corp

CIK 354204 AUSTIN, TX

Position in CIEN

as of Mar 31, 2026 · filed May 7, 2026
Position Value
$444,919,341
+$118,232,422 QoQ
Shares Held
1,146,020
-18.0% QoQ
Ownership
0.810%
of shares outstanding
% of Portfolio
0.09%
of 13F equity value
Holder Rank
not a current holder
Holding Since
Mar 2020
25 quarters on record
Voting authority Sole 83.3689638924277.ToString("F0")% Shared 12.779881677457636.ToString("F0")% None 3.8511544301146574.ToString("F0")%

Common Shares in CIEN Over Time

Shares Held

Position Value (USD)

Position in Communication Equipment

Technology · as of Mar 31, 2026

DIMENSIONAL FUND ADVISORS LP holds $4,767,598,711 across 31 Communication Equipment names. CIEN ranks #3 (9.3% of the industry book) .

# Ticker Company Shares Value (USD) Open
3 CIEN
Ciena Corp
This page
1,146,020 $444,919,341

All Filings in CIEN

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25 filing rows on record
Report Date Value (USD) Shares
2026-03-31 $444,919,341 1,146,020
2025-12-31 $326,686,919 1,396,874
2025-09-30 $290,713,471 1,995,699
2025-06-30 $184,555,986 2,269,224
2025-03-31 $143,670,993 2,377,478
2024-12-31 $220,720,651 2,602,531
2024-09-30 $162,969,846 2,646,044
2024-06-30 $130,389,917 2,706,308
2024-03-31 $107,949,101 2,182,995
2023-12-31 $97,330,071 2,162,410
2023-09-30 $86,496,620 1,830,229
2023-06-30 $71,069,834 1,672,625
2023-03-31 $88,256,391 1,680,434
2022-12-31 $85,949,779 1,685,951
2022-09-30 $67,295,934 1,664,505
2022-06-30 $76,445,175 1,672,761
2022-03-31 $106,329,983 1,753,752
2021-12-31 $131,767,790 1,711,937
2021-09-30 $87,784,006 1,709,523
2021-06-30 $97,331,109 1,710,865
2021-03-31 $94,610,496 1,728,993
2020-12-31 $89,897,480 1,700,993
2020-09-30 $65,501,518 1,650,328
2020-06-30 $89,055,071 1,644,296
2020-03-31 $66,128,948 1,661,114