Ciena Corporation
US ˙ NYSE ˙ US1717793095

SecurityCIEN / Ciena Corporation
InstitutionAmalgamated Bank
Latest Disclosed Ownership25,643 shares
Latest Disclosed Value $ 9,955
Amalgamated Bank reports 59.05% decrease in ownership of CIEN / Ciena Corporation

On May 8, 2026 - Amalgamated Bank filed a 13F-HR form disclosing ownership of 25,643 shares of Ciena Corporation (US:CIEN) valued at $9,955,382 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 62,619 shares of Ciena Corporation. This represents a change in shares of -59.05% during the quarter. The current value of the position is $15,908,148 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)
2026-05-08 2026-03-31 13F CIENA COM 171779309 25,643 -36,976 -59.05 10 -35.71 0.0762
2026-02-05 2025-12-31 13F CIENA COM 171779309 62,619 -2,505 -3.85 15 55.56 0.1057
2025-10-29 2025-09-30 13F CIENA COM 171779309 65,124 -304 -0.46 9 80.00 0.0678
2025-08-04 2025-06-30 13F CIENA COM 171779309 65,428 303 0.47 5 66.67 0.0411
2025-04-25 2025-03-31 13F CIENA COM 171779309 65,125 -3,681 -5.35 4 -40.00 0.0337
2025-02-04 2024-12-31 13F CIENA COM 171779309 68,806 273 0.40 6 25.00 0.0479
2024-10-30 2024-09-30 13F CIENA COM 171779309 68,533 -12,699 -15.63 4 33.33 0.0348
2024-08-12 2024-06-30 13F CIENA COM 171779309 81,232 1,869 2.36 4 0.00 0.0333
2024-04-23 2024-03-31 13F CIENA COM 171779309 79,363 -13,163 -14.23 4 -25.00 0.0336
2024-02-06 2023-12-31 13F CIENA COM 171779309 92,526 -2,553 -2.69 4 0.00 0.0332
2023-11-08 2023-09-30 13F CIENA COM 171779309 95,079 -2,080 -2.14 4 0.00 0.0383
2023-08-11 2023-06-30 13F CIENA COM 171779309 97,159 -4,539 -4.46 4 -20.00 0.0334
2023-05-02 2023-03-31 13F CIENA COM 171779309 101,698 -19,037 -15.77 5 -16.67 0.0455
2023-02-10 2022-12-31 13F CIENA COM 171779309 120,735 13,495 12.58 6 -99.86 0.0549
2022-11-09 2022-09-30 13F CIENA COM 171779309 107,240 -2,175 -1.99 4,336 -13.28 0.0419
2022-08-15 2022-06-30 13F CIENA COM 171779309 109,415 2,337 2.18 5,000 -22.98 0.0466
2022-08-25 2022-03-31 13F/A-1 CIENA COM 171779309 107,078 -4,078 -3.67 6,492 -24.12 0.0504
2022-06-30 2022-03-31 13F CIENA COM 171779309 107,078 -4,078 6,492 0.0516
2022-02-15 2021-12-31 13F/A-1 CIENA COM 171779309 111,156 880 0.80 8,556 51.09 0.0631
2022-02-15 2021-12-31 13F CIENA COM 171779309 111,156 880 8,556 0.0631
2021-10-29 2021-09-30 13F CIENA COM 171779309 110,276 -11,528 -9.46 5,663 -18.27 0.0478
2021-08-16 2021-06-30 13F CIENA COM 171779309 121,804 102,713 538.02 6,929 563.06 0.0555
2021-05-13 2021-03-31 13F CIENA COM 171779309 19,091 -1,261 -6.20 1,045 -2.88 0.0392
2021-02-12 2020-12-31 13F CIENA COM 171779309 20,352 63 0.31 1,076 33.66 0.0408
2020-10-30 2020-09-30 13F CIENA COM 171779309 20,289 -103 -0.51 805 -27.08 0.0350
2020-08-10 2020-06-30 13F CIENA COM 171779309 20,392 -14,272 -41.17 1,104 -20.00 0.0511
2020-05-13 2020-03-31 13F CIENA COM 171779309 34,664 -737 -2.08 1,380 -8.67 0.0337
2020-02-13 2019-12-31 13F CIENA COM 171779309 35,401 3,579 11.25 1,511 21.07 0.0278
2019-11-13 2019-09-30 13F CIENA COM 171779309 31,822 -556 -1.72 1,248 -6.31 0.0262
2019-08-14 2019-06-30 13F CIENA COM 171779309 32,378 11,195 52.85 1,332 68.39 0.0311
2019-05-15 2019-03-31 13F CIENA COM 171779309 21,183 715 3.49 791 13.98 0.0192
2019-02-15 2018-12-31 13F CIENA COM 171779309 20,468 -303 -1.46 694 6.93 0.0197
2018-11-14 2018-09-30 13F CIENA COM 171779309 20,771 -221 -1.05 649 16.73 0.0160
2018-07-18 2018-06-30 13F CIENA COM 171779309 20,992 381 1.85 556 4.12 0.0136
2018-05-22 2018-03-31 13F CIENA COM 171779309 20,611 -66 -0.32 534 23.33 0.0142
2018-02-13 2017-12-31 13F CIENA COM 171779309 20,677 1,276 6.58 433 1.64 0.0117
2017-11-09 2017-09-30 13F CIENA COM 171779309 19,401 -899 -4.43 426 -16.14 0.0133
2017-08-10 2017-06-30 13F CIENA COM 171779309 20,300 1,400 7.41 508 13.90 0.0167
2017-05-12 2017-03-31 13F CIENA COM 171779309 18,900 -18 -0.10 446 -3.46 0.0222
2017-02-14 2016-12-31 13F CIENA COM 171779309 18,918 2,344 14.14 462 27.98 0.0209
2016-11-15 2016-09-30 13F/A-1 CIENA COM 171779309 16,574 126 0.77 361 6.49 0.0209
2016-08-16 2016-06-30 13F CIENA COM 171779309 16,448 2,864 21.08 339 31.40 0.0196
2016-05-11 2016-03-31 13F CIENA COM 171779309 13,584 1,146 9.21 258 0.39 0.0251
2016-02-10 2015-12-31 13F CIENA COM 171779309 12,438 -1,075 -7.96 257 -8.21 0.0317
2015-11-04 2015-09-30 13F CIENA COM 171779309 13,513 801 6.30 280 -6.98 0.0294
2015-07-10 2015-06-30 13F CIENA COM 171779309 12,712 1,570 14.09 301 40.00 0.0296
2015-04-22 2015-03-31 13F CIENA COM 171779309 11,142 11,142 0.00 215 0.0262
2015-01-29 2014-12-31 13F CIENA COM 171779309 0 -10,700 -100.00 0 -100.00
2014-11-14 2014-09-30 13F CIENA COM 171779309 10,700 5 0.05 179 -22.84 0.0266
2014-08-11 2014-06-30 13F CIENA COM 171779309 10,695 2,095 24.36 232 12.62 0.0350
2014-02-13 2013-12-31 13F CIENA CORP COM COM 171779309 8,600 8,600 206 0.0350
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.