Ciena Corporation
US ˙ NYSE ˙ US1717793095

SecurityCIEN / Ciena Corporation
InstitutionAdvisor Group Holdings, Inc.
Latest Disclosed Ownership29,026 shares
Latest Disclosed Value $ 11,269,739
Advisor Group Holdings, Inc. reports 39.39% increase in ownership of CIEN / Ciena Corporation

On May 15, 2026 - Advisor Group Holdings, Inc. filed a 13F-HR form disclosing ownership of 29,026 shares of Ciena Corporation (US:CIEN) valued at $11,268,764 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 20,824 shares of Ciena Corporation. This represents a change in shares of 39.39% during the quarter. The current value of the position is $14,170,783 USD.

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)
2026-05-15 2026-03-31 13F CIENA COM NEW 171779309 29,026 8,202 39.39 11,270 131.40 0.0096
2026-02-17 2025-12-31 13F CIENA COM NEW 171779309 20,824 11,422 121.48 4,870 313.76 0.0071
2025-11-14 2025-09-30 13F CIENA COM NEW 171779309 9,402 1,824 24.07 1,177 92.01 0.0016
2025-09-04 2025-06-30 13F/A-1 IENA COM NEW 171779309 7,578 1,148 17.85 614 57.99 0.0011
2025-08-13 2025-06-30 13F IENA COM NEW 171779309 6,410 -20 527 0.0006
2025-05-12 2025-03-31 13F CIENA COM NEW 171779309 6,430 2,744 74.44 389 24.36 0.0009
2025-06-06 2024-12-31 13F/A-1 CIENA COM NEW 171779309 3,686 -24 -0.65 313 36.84 0.0007
2025-02-07 2024-12-31 13F CIENA COM NEW 171779309 3,259 -451 230 0.0006
2024-11-13 2024-09-30 13F CIENA COM NEW 171779309 3,710 -1,064 -22.29 229 -0.87 0.0005
2024-08-13 2024-06-30 13F CIENA COM NEW 171779309 4,774 -16,947 -78.02 230 -78.58 0.0005
2024-05-10 2024-03-31 13F CIENA COM NEW 171779309 21,721 -33,139 -60.41 1,074 -56.50 0.0024
2024-02-12 2023-12-31 13F CIENA COM NEW 171779309 54,860 -87,538 -61.47 2,469 -63.31 0.0043
2023-11-13 2023-09-30 13F CIENA COM NEW 171779309 142,398 9,497 7.15 6,729 18.82 0.0099
2023-08-21 2023-06-30 13F/A-1 CIENA COM NEW 171779309 132,901 -14,962 -10.12 5,664 -26.99 0.0102
2023-08-10 2023-06-30 13F CIENA COM NEW 171779309 133,980 -13,883 5,663 0.0015
2023-05-12 2023-03-31 13F CIENA COM NEW 171779309 147,863 11,286 8.26 7,756 11.40 0.0146
2023-02-10 2022-12-31 13F CIENA COM NEW 171779309 136,577 5,026 3.82 6,962 30.89 0.0141
2022-11-14 2022-09-30 13F CIENA COM NEW 171779309 131,551 6,165 4.92 5,319 -7.16 0.0122
2022-08-10 2022-06-30 13F CIENA COM NEW 171779309 125,386 14,067 12.64 5,729 2.67 0.0126
2022-05-04 2022-03-31 13F CIENA COM NEW 171779309 111,319 -7,052 -5.96 5,580 -38.80 0.0108
2022-02-03 2021-12-31 13F CIENA COM NEW 171779309 118,371 10,854 10.10 9,118 64.61 0.0173
2021-11-05 2021-09-30 13F CIENA COM NEW 171779309 107,517 6,637 6.58 5,539 -3.89 0.0115
2021-08-02 2021-06-30 13F CIENA COM NEW 171779309 100,880 -53 -0.05 5,763 3.69 0.0125
2021-05-13 2021-03-31 13F CIENA COM NEW 171779309 100,933 9,854 10.82 5,558 15.48 0.0134
2021-02-10 2020-12-31 13F CIENA COM NEW 171779309 91,079 16,426 22.00 4,813 54.46 0.0129
2020-11-12 2020-09-30 13F CIENA COM NEW 171779309 74,653 14,950 25.04 3,116 -3.53 0.0093
2020-08-14 2020-06-30 13F CIENA COM NEW 171779309 59,703 10,603 21.59 3,230 59.51 0.0108
2020-05-18 2020-03-31 13F CIENA COM NEW 171779309 49,100 49,100 2,025 0.0083
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.