西耶納公司
MX ˙ BMV ˙ US1717793095
SecurityMX:CIEN / Ciena Corporation
InstitutionBaird Financial Group, Inc.
Latest Disclosed Ownership3,137 shares
Latest Disclosed Value $ 1,217,878
Baird Financial Group, Inc. reports 7.98% decrease in ownership of CIEN / Ciena Corporation

On May 14, 2026 - Baird Financial Group, Inc. filed a 13F-HR form disclosing ownership of 3,137 shares of Ciena Corporation (MX:CIEN) valued at $1,217,878 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 3,409 shares of Ciena Corporation. This represents a change in shares of -7.98% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-14 2026-03-31 13F CIENA COM NEW 171779309 3,137 -272 -7.98 1,218 52.70 0.0010
2026-02-13 2025-12-31 13F CIENA CORP COM COMMON 171779309 3,409 -1,253 -26.88 797 17.38 0.0012
2025-11-13 2025-09-30 13F CIENA CORP COM COMMON 171779309 4,662 -2,552 -35.38 679 15.87 0.0011
2025-08-13 2025-06-30 13F CIENA CORP COM COMMON 171779309 7,214 -499 -6.47 587 25.75 0.0010
2025-05-15 2025-03-31 13F CIENA CORP COM COMMON 171779309 7,713 -9,426 -55.00 466 -67.93 0.0009
2025-02-14 2024-12-31 13F CIENA CORPORATION COM COMMON 171779309 17,139 7,440 76.71 1,454 143.38 0.0028
2024-11-14 2024-09-30 13F CIENA CORPORATION COM COMMON 171779309 9,699 263 2.79 597 31.50 0.0012
2024-08-14 2024-06-30 13F CIENA CORPORATION COM COMMON 171779309 9,436 0 0.00 455 -2.58 0.0009
2024-05-14 2024-03-31 13F CIENA CORPORATION COM COMMON 171779309 9,436 -1,920 -16.91 467 -8.81 0.0010
2024-02-14 2023-12-31 13F CIENA CORPORATION COM COMMON 171779309 11,356 793 7.51 511 2.40 0.0012
2023-11-13 2023-09-30 13F CIENA CORPORATION COM COMMON 171779309 10,563 345 3.38 499 14.98 0.0014
2023-08-11 2023-06-30 13F CIENA CORPORATION COM COMMON 171779309 10,218 -528 -4.91 434 -23.05 0.0011
2023-05-15 2023-03-31 13F CIENA CORPORATION COM COMMON 171779309 10,746 -320 -2.89 564 0.0014
2023-02-13 2022-12-31 13F CIENA CORPORATION COM COMMON 171779309 11,066 11,066 1 0.0015
2022-05-13 2022-03-31 13F CIENA CORP COM COMMON 171779309 0 -27,835 -100.00 0 -100.00
2022-02-09 2021-12-31 13F CIENA CORP COM COMMON 171779309 27,835 -54,047 -66.01 2,143 -49.04 0.0050
2021-11-12 2021-09-30 13F CIENA CORP COM COMMON 171779309 81,882 -2,553 -3.02 4,205 -12.45 0.0108
2021-08-11 2021-06-30 13F CIENA CORP COM COMMON 171779309 84,435 -13,065 -13.40 4,803 -9.97 0.0125
2021-05-13 2021-03-31 13F CIENA COMMON 171779309 97,500 24,967 34.42 5,335 39.19 0.0150
2021-02-11 2020-12-31 13F CIENA COMMON 171779309 72,533 -2,893 -3.84 3,833 28.02 0.0115
2020-11-12 2020-09-30 13F CIENA COMMON 171779309 75,426 10,571 16.30 2,994 -14.77 0.0103
2020-10-22 2020-06-30 13F/A-1 CIENA COMMON 171779309 64,855 53,759 484.49 3,513 694.80 0.0132
2020-08-14 2020-06-30 13F CIENA COMMON 171779309 12,254 1,158 523 1,036.4672
2020-05-14 2020-03-31 13F CIENA CORPORATION COM COMMON 171779309 11,096 -640 -5.45 442 -11.78 0.0020
2020-02-14 2019-12-31 13F CIENA CORPORATION COM COMMON 171779309 11,736 -82,379 -87.53 501 -86.43 0.0018
2019-11-14 2019-09-30 13F CIENA Common 171779309 94,115 -91,642 -49.33 3,692 -51.68 0.0145
2019-08-14 2019-06-30 13F CIENA COMMON 171779309 185,757 185,757 7,641 0.0297
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.