Ciena Corporation (CIEN) Institutional Ownership & Insider Trading

1,218 institutions reported holding Ciena Corporation shares in 13F filings for the quarter ended 2026-06-30, according to EquiReason's reading of their SEC filings. 97 insider trades on Form 4 since 2025-10-01.

Source: SEC EDGAR filings · figures as of 2026-08-01 · read by EquiReason

CIENCiena CorporationFollow CIEN — free

Communication Equipment · Technology

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Market cap: 45.4B
P/E TTM: 71.5
Dividend yield: —
52-week: —
Next earnings: 9 Dec, in 46 days

Institutions · all 13F filers

quarter to 30 Jun 2026 · filers in both quarters

1,218 institutions held 93.2% of the shares. Across filers that reported both quarters, shares held changed -2.6%.

Largest moves, shares (millions)

Institutional flow by quarter

net shares added or trimmed, millions · filers in both quarters

Quarter	Holders	Shares held, M	Change	Increased	New	Decreased	Closed
Jun 26	1,218	132	-2.6%	423	223	355	84
Mar 26	1,071	134	-5.0%	297	269	347	63
Dec 25	828	137	-6.1%	229	182	259	66
Sep 25	674	146	+3.3%	154	150	235	35
Jun 25	558	141	+3.5%	167	85	163	68
Mar 25	536	136	-3.2%	170	78	166	70
Dec 24	521	140	-1.3%	145	94	152	39
Sep 24	456	142	+0.5%	134	60	140	57

Ciena Corporation — questions

Who owns Ciena Corporation stock?: 1,218 institutions reported Ciena Corporation shares in 13F filings for the quarter ended 2026-06-30. The largest: FMR LLC (13.5%), BlackRock, Inc. (9.0%), JPMORGAN CHASE & CO (7.9%).
Are Ciena Corporation insiders buying or selling?: 97 insider trades on Form 4 since 2025-10-01; the full list, with dates, people and plan status, is on this page.

Every figure on this page comes from Ciena Corporation's own SEC filings — see them on SEC EDGAR. Price data is licensed and shown only inside the product.

How these figures are read: methodology · EquiReason.

Important information. Figures on this page are taken from filings submitted to the U.S. Securities and Exchange Commission (SEC) and processed automatically by EquiReason. They may contain errors, omissions or delays, and EquiReason makes no representation or warranty as to their accuracy, completeness or timeliness. Always verify figures against the original filing on SEC EDGAR before relying on them.

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