Ciena Corporation
US ˙ NYSE ˙ US1717793095

SecurityCIEN / Ciena Corporation
InstitutionStifel Financial Corp
Latest Disclosed Ownership102,611 shares
Latest Disclosed Value $ 39,836,674
Stifel Financial Corp reports 26.10% increase in ownership of CIEN / Ciena Corporation

On May 12, 2026 - Stifel Financial Corp filed a 13F-HR form disclosing ownership of 102,611 shares of Ciena Corporation (US:CIEN) valued at $39,836,669 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 81,373 shares of Ciena Corporation. This represents a change in shares of 26.10% during the quarter. The current value of the position is $54,961,530 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)
2026-05-12 2026-03-31 13F CIENA COM NEW 171779309 102,611 21,238 26.10 39,837 109.33 0.0086
2026-02-13 2025-12-31 13F CIENA COM NEW 171779309 81,373 -15,135 -15.68 19,031 35.37 0.0171
2025-11-12 2025-09-30 13F CIENA COM NEW 171779309 96,508 -5,290 -5.20 14,058 69.80 0.0128
2025-08-14 2025-06-30 13F CIENA COM NEW 171779309 101,798 -3,396 -3.23 8,279 30.25 0.0081
2025-05-14 2025-03-31 13F CIENA COM NEW 171779309 105,194 -2,028 -1.89 6,357 -30.10 0.0068
2025-02-13 2024-12-31 13F CIENA COM NEW 171779309 107,222 1,448 1.37 9,094 39.59 0.0095
2024-11-14 2024-09-30 13F CIENA COM NEW 171779309 105,774 3,153 3.07 6,515 31.76 0.0068
2024-08-13 2024-06-30 13F CIENA COM NEW 171779309 102,621 -21,722 -17.47 4,944 -19.58 0.0056
2024-05-14 2024-03-31 13F CIENA COM NEW 171779309 124,343 4,715 3.94 6,149 14.19 0.0070
2024-02-12 2023-12-31 13F CIENA COM NEW 171779309 119,628 3,692 3.18 5,384 -1.73 0.0068
2023-11-13 2023-09-30 13F CIENA COM NEW 171779309 115,936 8,141 7.55 5,479 19.63 0.0077
2023-08-14 2023-06-30 13F CIENA COM NEW 171779309 107,795 -12,078 -10.08 4,580 -27.24 0.0063
2023-05-12 2023-03-31 13F CIENA COM NEW 171779309 119,873 7,781 6.94 6,296 10.17 0.0090
2023-02-13 2022-12-31 13F CIENA COM NEW 171779309 112,092 -18,651 -14.27 5,714 8.10 0.0086
2022-11-14 2022-09-30 13F CIENA COM NEW 171779309 130,743 3,544 2.79 5,286 -9.07 0.0087
2022-08-15 2022-06-30 13F CIENA COM NEW 171779309 127,199 7,212 6.01 5,813 -20.10 0.0091
2022-05-13 2022-03-31 13F CIENA COM NEW 171779309 119,987 -18,555 -13.39 7,275 -31.78 0.0099
2022-02-14 2021-12-31 13F CIENA COM NEW 171779309 138,542 -163,829 -54.18 10,664 -31.32 0.0141
2021-11-15 2021-09-30 13F CIENA COM NEW 171779309 302,371 -2,456 -0.81 15,527 -10.47 0.0228
2021-08-13 2021-06-30 13F CIENA COM NEW 171779309 304,827 2,808 0.93 17,342 4.94 0.0260
2021-05-14 2021-03-31 13F CIENA COM NEW 171779309 302,019 -5,214 -1.70 16,526 1.78 0.0272
2021-02-12 2020-12-31 13F CIENA COM NEW 171779309 307,233 22,692 7.97 16,237 43.78 0.0290
2020-11-16 2020-09-30 13F CIENA COM NEW 171779309 284,541 176,674 163.79 11,293 93.27 0.0232
2020-08-14 2020-06-30 13F CIENA COM NEW 171779309 107,867 20,771 23.85 5,843 68.92 0.0134
2020-05-14 2020-03-31 13F CIENA COM NEW 171779309 87,096 -263,941 -75.19 3,459 -76.88 0.0096
2020-02-13 2019-12-31 13F CIENA COM NEW 171779309 351,037 -8,917 -2.48 14,963 5.60 0.0312
2019-11-19 2019-09-30 13F/A-1 CIENA COM NEW 171779309 359,954 -109,326 -23.30 14,170 -26.79 0.0362
2019-11-13 2019-09-30 13F CIENA COM NEW 171779309 359,954 -109,326 14,170 7,942.9952
2019-08-14 2019-06-30 13F CIENA COM NEW 171779309 469,280 87,549 22.93 19,354 35.27 0.0499
2019-05-14 2019-03-31 13F CIENA COM NEW 171779309 381,731 -50,919 -11.77 14,308 -2.90 0.0404
2019-02-13 2018-12-31 13F CIENA COM NEW 171779309 432,650 355,397 460.04 14,736 512.21 0.0476
2018-11-13 2018-09-30 13F CIENA COM NEW 171779309 77,253 -7,977 -9.36 2,407 6.65 0.0069
2018-08-14 2018-06-30 13F CIENA COM NEW 171779309 85,230 6,970 8.91 2,257 11.13 0.0069
2018-05-11 2018-03-31 13F CIENA COM NEW 171779309 78,260 1,186 1.54 2,031 25.99 0.0064
2018-02-14 2017-12-31 13F CIENA COM NEW 171779309 77,074 7,004 10.00 1,612 4.81 0.0051
2017-11-13 2017-09-30 13F CIENA COM NEW 171779309 70,070 9,389 15.47 1,538 1.25 0.0053
2017-08-14 2017-06-30 13F CIENA COM NEW 171779309 60,681 3,080 5.35 1,519 11.45 0.0056
2017-05-10 2017-03-31 13F CIENA COM NEW 171779309 57,601 461 0.81 1,363 -2.36 0.0053
2017-02-16 2016-12-31 13F CIENA COM NEW 171779309 57,140 -3,174 -5.26 1,396 5.76 0.0059
2016-11-15 2016-09-30 13F CIENA COM NEW 171779309 60,314 -2,459 -3.92 1,320 11.96 0.0059
2016-08-17 2016-06-30 13F CIENA COM NEW 171779309 62,773 -169,553 -72.98 1,179 -73.31 0.0055
2016-05-16 2016-03-31 13F CIENA COM NEW 171779309 232,326 -35,144 -13.14 4,418 -20.15 0.0235
2016-03-21 2015-12-31 13F/A-2 CIENA COM NEW 171779309 267,470 179,210 203.05 5,533 202.68 0.0288
2016-02-26 2015-12-31 13F/A-1 CIENA COM NEW 171779309 236,854 -30,616 5,451 0.0285
2016-02-16 2015-12-31 13F CIENA COM NEW 171779309 237,434 6,239
2015-11-16 2015-09-30 13F CIENA COM NEW 171779309 88,260 -19,999 -18.47 1,828 -28.71 0.0103
2015-08-17 2015-06-30 13F/A-1 CIENA COM NEW 171779309 108,259 -4,570 -4.05 2,564 17.72 0.0133
2015-08-17 2015-06-30 13F CIENA COM NEW 171779309 108,259 2,564
2015-05-14 2015-03-31 13F CIENA COM NEW 171779309 112,829 8,359 8.00 2,178 7.40 0.0119
2015-02-13 2014-12-31 13F CIENA COM NEW 171779309 104,470 3,474 3.44 2,028 20.14 0.0113
2014-11-13 2014-09-30 13F CIENA COM NEW 171779309 100,996 1,517 1.52 1,688 -21.67 0.0148
2014-08-14 2014-06-30 13F CIENA COM NEW 171779309 99,479 22,068 28.51 2,155 22.44 0.0194
2014-05-15 2014-03-31 13F CIENA COM NEW 171779309 77,411 77,411 1,760 0.0168
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.