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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
30 Jun 2025
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 6 Aug 2025
Managers listing it
17
at least, of 95 tracked, among listed positions
Comparable managers
95
filed both Q1 2025 and Q2 2025; 10 listed it in both
Shares listed
33,616,412
combined, among listed positions
Reported value
$2.7bn
combined, at the quarter end

Among the 95 comparable managers: 10 buyers (opened or added shares) and 6 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 Q2 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q1 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

17 of 17 holders

ActionFiling
Fidelity (FMR LLC)21,232,630$1.7bn0.10%Trimmed-80,39314 Aug 2025 (the filing on sec.gov)
Point72 Asset Management LP2,754,675$224m0.44%Added+763,42214 Aug 2025 (the filing on sec.gov)
Capital World Investors1,706,474$139munder 0.1%Trimmed-146,53513 Aug 2025 (the filing on sec.gov)
Neuberger Berman Group LLC1,471,712$120m0.09%Trimmed-175,36227 Oct 2026 (the filing on sec.gov)
AQR Capital Management LLC1,220,927$99m0.08%Addedn.a.14 Aug 2025 (the filing on sec.gov)
Balyasny Asset Management LLC1,032,393$84m0.13%Addedn.a.14 Aug 2025 (the filing on sec.gov)
Rokos Capital Management LLP997,425$81m0.35%Added+843,23514 Aug 2025 (the filing on sec.gov)
Whale Rock Capital Management LLC835,848$68m0.94%Newnew14 Aug 2025 (the filing on sec.gov)
Janus Henderson Group Ltd731,585$59munder 0.1%Trimmed-77,01414 Aug 2025 (the filing on sec.gov)
Freestone Grove Partners LP509,409$41m0.31%Newnew14 Aug 2025 (the filing on sec.gov)
Woodline Partners LP434,502$35m0.19%Trimmed-380,01214 Aug 2025 (the filing on sec.gov)
Caxton Associates LLP250,000$20m0.52%Added+187,65815 Aug 2025 (the filing on sec.gov)
Verition Fund Management LLC166,116$14m0.06%Trimmed-21,61814 Aug 2025 (the filing on sec.gov)
First Eagle Investment Management LLC118,349$9.6munder 0.1%Newnew6 Aug 2025 (the filing on sec.gov)
ExodusPoint Capital Management LP95,865$7.8m0.07%Addedn.a.13 Aug 2025 (the filing on sec.gov)
Bridgewater Associates LP47,956$3.9munder 0.1%Newnew13 Aug 2025 (the filing on sec.gov)
Maverick Capital Ltd10,546$858kunder 0.1%Held014 Aug 2025 (the filing on sec.gov)

Largest increases and reductions, by shares

Q1 2025 to Q2 2025, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

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

New (4)

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 →