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CIEN in the 13F filings

Ciena Corp · CUSIP 171779309

Sector · Technology hardware and equipmentTheme · AI infrastructure and semiconductors· L3VLUP-defined
Quarter
Q3 2026 · early filersQ2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023
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

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q3 2023, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

11 of 11 holders

ActionFiling
Fidelity (FMR LLC)11,317,655$509munder 0.1%Added+2,377,0155 Nov 2026 (the filing on sec.gov)
Capital World Investors3,513,633$158munder 0.1%Added+791,21513 Feb 2024 (the filing on sec.gov)
Neuberger Berman Group LLC2,066,852$93m0.08%Added+114,38714 Nov 2024 (the filing on sec.gov)
Woodline Partners LP1,085,461$49m0.53%Added+719,47214 Feb 2024 (the filing on sec.gov)
Rokos Capital Management LLP696,980$31m0.27%Held014 Feb 2024 (the filing on sec.gov)
Squarepoint Ops LLC578,356$26munder 0.1%Added+171,30914 Feb 2024 (the filing on sec.gov)
Two Sigma Investments LP396,548$18munder 0.1%Addedn.a.14 Feb 2024 (the filing on sec.gov)
Tudor Investment Corp187,152$8.4m0.07%Addedn.a.14 Feb 2024 (the filing on sec.gov)
ExodusPoint Capital Management LP148,002$6.7munder 0.1%Added+61,15614 Feb 2024 (the filing on sec.gov)
PDT Partners LLC63,551$2.9m0.32%Newnew14 Feb 2024 (the filing on sec.gov)
Brevan Howard Capital Management LP11,374$512kunder 0.1%Newnew14 Feb 2024 (the filing on sec.gov)

Largest increases and reductions, by shares

Q3 2023 to Q4 2023, among managers that listed it in both quarters or opened it.

Increases

Reductions

No reduction among listed positions.

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (2)

Exited (0)

No exit shown by a manager’s own filing.

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
8 in Q3 2024 to 27 in Q2 2026

Tracked managers listing it, at least.

01020302014201620182020202220242026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
CIEN by quarter
QuarterHoldersReported valueBuyersSellers
Q2 20138$199mn.a.n.a.
Q3 20139$264mn.a.n.a.
Q4 20134$110mn.a.n.a.
Q1 20141$28mn.a.n.a.
Q2 20144$113mn.a.n.a.
Q3 20145$116mn.a.n.a.
Q4 20146$140mn.a.n.a.
Q1 20156$320mn.a.n.a.
Q2 20159$383mn.a.n.a.
Q3 201510$429mn.a.n.a.
Q4 20158$513mn.a.n.a.
Q1 20167$308mn.a.n.a.
Q2 20167$230mn.a.n.a.
Q3 20165$239mn.a.n.a.
Q4 20169$500mn.a.n.a.
Q1 20174$272mn.a.n.a.
Q2 20178$385mn.a.n.a.
Q3 20175$521mn.a.n.a.
Q4 201712$602mn.a.n.a.
Q1 20188$340mn.a.n.a.
Q2 20186$330mn.a.n.a.
Q3 201810$456mn.a.n.a.
Q4 20188$413mn.a.n.a.
Q1 201910$548mn.a.n.a.
Q2 201917$676mn.a.n.a.
Q3 201911$716mn.a.n.a.
Q4 201917$920mn.a.n.a.
Q1 202016$887mn.a.n.a.
Q2 202016$1.3bnn.a.n.a.
Q3 202012$575mn.a.n.a.
Q4 202012$774mn.a.n.a.
Q1 20219$596mn.a.n.a.
Q2 20217$615mn.a.n.a.
Q3 20216$388mn.a.n.a.
Q4 20216$1.5bnn.a.n.a.
Q1 202213$1.5bnn.a.n.a.
Q2 202215$1.2bnn.a.n.a.
Q3 202212$1.1bnn.a.n.a.
Q4 202214$1.2bnn.a.n.a.
Q1 202313$1.2bnn.a.n.a.
Q2 202311$498mn.a.n.a.
Q3 202310$856mn.a.n.a.
Q4 202311$903m100
Q1 20247$1.3bn53
Q2 202411$1.3bn84
Q3 20248$1.7bn44
Q4 202412$2.7bn77
Q1 202516$1.8bn124
Q2 202517$2.7bn106
Q3 202521$5.4bn1311
Q4 202524$8.9bn1626
Q1 202629$15.3bn2122
Q2 202627$16.3bn2619

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.

Which funds own CIEN, latest filings →Back to the 13F Explorer →