CIEN in the 13F filings
Ciena Corp · CUSIP 171779309
- Quarter end
- 31 Dec 2023
- the date the book describes
- Filed
- 5 Nov 2026
- latest of these filings; the earliest 13 Feb 2024
- Managers listing it
- 11
- at least, of 95 tracked, among listed positions
- Comparable managers
- 93
- filed both Q3 2023 and Q4 2023; 7 listed it in both
- Shares listed
- 20,065,564
- combined, among listed positions
- Reported value
- $903m
- combined, at the quarter end
Among the 93 comparable managers: 10 buyers (opened or added shares) and 0 sellers (trimmed or exited), at least, among listed positions. Their net change in shares is not known from listed positions, because at least one of them lists it in only one of the two quarters.
Managers listing CIEN in Q4 2023
11 of 11 holders
| Action | Filing | |||||
|---|---|---|---|---|---|---|
| Fidelity (FMR LLC) | 11,317,655 | $509m | under 0.1% | Added | +2,377,015 | 5 Nov 2026 (the filing on sec.gov) |
| Capital World Investors | 3,513,633 | $158m | under 0.1% | Added | +791,215 | 13 Feb 2024 (the filing on sec.gov) |
| Neuberger Berman Group LLC | 2,066,852 | $93m | 0.08% | Added | +114,387 | 14 Nov 2024 (the filing on sec.gov) |
| Woodline Partners LP | 1,085,461 | $49m | 0.53% | Added | +719,472 | 14 Feb 2024 (the filing on sec.gov) |
| Rokos Capital Management LLP | 696,980 | $31m | 0.27% | Held | 0 | 14 Feb 2024 (the filing on sec.gov) |
| Squarepoint Ops LLC | 578,356 | $26m | under 0.1% | Added | +171,309 | 14 Feb 2024 (the filing on sec.gov) |
| Two Sigma Investments LP | 396,548 | $18m | under 0.1% | Added | n.a. | 14 Feb 2024 (the filing on sec.gov) |
| Tudor Investment Corp | 187,152 | $8.4m | 0.07% | Added | n.a. | 14 Feb 2024 (the filing on sec.gov) |
| ExodusPoint Capital Management LP | 148,002 | $6.7m | under 0.1% | Added | +61,156 | 14 Feb 2024 (the filing on sec.gov) |
| PDT Partners LLC | 63,551 | $2.9m | 0.32% | New | new | 14 Feb 2024 (the filing on sec.gov) |
| Brevan Howard Capital Management LP | 11,374 | $512k | under 0.1% | New | new | 14 Feb 2024 (the filing on sec.gov) |
Largest increases and reductions, by shares
Increases
- Fidelity (FMR LLC)existing position · 11,317,655 shares now+2,377,015
- Capital World Investorsexisting position · 3,513,633 shares now+791,215
- Woodline Partners LPexisting position · 1,085,461 shares now+719,472
- Squarepoint Ops LLCexisting position · 578,356 shares now+171,309
- Neuberger Berman Group LLCexisting position · 2,066,852 shares now+114,387
Reductions
No reduction among listed positions.
New positions and exits
New (2)
Exited (0)
No exit shown by a manager’s own filing.
Ownership over time
Tracked managers listing it, at least.
| Quarter | Holders | Reported value | Buyers | Sellers |
|---|---|---|---|---|
| Q2 2013 | 8 | $199m | n.a. | n.a. |
| Q3 2013 | 9 | $264m | n.a. | n.a. |
| Q4 2013 | 4 | $110m | n.a. | n.a. |
| Q1 2014 | 1 | $28m | n.a. | n.a. |
| Q2 2014 | 4 | $113m | n.a. | n.a. |
| Q3 2014 | 5 | $116m | n.a. | n.a. |
| Q4 2014 | 6 | $140m | n.a. | n.a. |
| Q1 2015 | 6 | $320m | n.a. | n.a. |
| Q2 2015 | 9 | $383m | n.a. | n.a. |
| Q3 2015 | 10 | $429m | n.a. | n.a. |
| Q4 2015 | 8 | $513m | n.a. | n.a. |
| Q1 2016 | 7 | $308m | n.a. | n.a. |
| Q2 2016 | 7 | $230m | n.a. | n.a. |
| Q3 2016 | 5 | $239m | n.a. | n.a. |
| Q4 2016 | 9 | $500m | n.a. | n.a. |
| Q1 2017 | 4 | $272m | n.a. | n.a. |
| Q2 2017 | 8 | $385m | n.a. | n.a. |
| Q3 2017 | 5 | $521m | n.a. | n.a. |
| Q4 2017 | 12 | $602m | n.a. | n.a. |
| Q1 2018 | 8 | $340m | n.a. | n.a. |
| Q2 2018 | 6 | $330m | n.a. | n.a. |
| Q3 2018 | 10 | $456m | n.a. | n.a. |
| Q4 2018 | 8 | $413m | n.a. | n.a. |
| Q1 2019 | 10 | $548m | n.a. | n.a. |
| Q2 2019 | 17 | $676m | n.a. | n.a. |
| Q3 2019 | 11 | $716m | n.a. | n.a. |
| Q4 2019 | 17 | $920m | n.a. | n.a. |
| Q1 2020 | 16 | $887m | n.a. | n.a. |
| Q2 2020 | 16 | $1.3bn | n.a. | n.a. |
| Q3 2020 | 12 | $575m | n.a. | n.a. |
| Q4 2020 | 12 | $774m | n.a. | n.a. |
| Q1 2021 | 9 | $596m | n.a. | n.a. |
| Q2 2021 | 7 | $615m | n.a. | n.a. |
| Q3 2021 | 6 | $388m | n.a. | n.a. |
| Q4 2021 | 6 | $1.5bn | n.a. | n.a. |
| Q1 2022 | 13 | $1.5bn | n.a. | n.a. |
| Q2 2022 | 15 | $1.2bn | n.a. | n.a. |
| Q3 2022 | 12 | $1.1bn | n.a. | n.a. |
| Q4 2022 | 14 | $1.2bn | n.a. | n.a. |
| Q1 2023 | 13 | $1.2bn | n.a. | n.a. |
| Q2 2023 | 11 | $498m | n.a. | n.a. |
| Q3 2023 | 10 | $856m | n.a. | n.a. |
| Q4 2023 | 11 | $903m | 10 | 0 |
| Q1 2024 | 7 | $1.3bn | 5 | 3 |
| Q2 2024 | 11 | $1.3bn | 8 | 4 |
| Q3 2024 | 8 | $1.7bn | 4 | 4 |
| Q4 2024 | 12 | $2.7bn | 7 | 7 |
| Q1 2025 | 16 | $1.8bn | 12 | 4 |
| Q2 2025 | 17 | $2.7bn | 10 | 6 |
| Q3 2025 | 21 | $5.4bn | 13 | 11 |
| Q4 2025 | 24 | $8.9bn | 16 | 26 |
| Q1 2026 | 29 | $15.3bn | 21 | 22 |
| Q2 2026 | 27 | $16.3bn | 26 | 19 |
Compare with…
Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.
CIEN and NVDA →CIEN and AVGO →CIEN and MU →Choose a stock to compare with CIEN →
How much of the picture this is
A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.
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