SightfileU.S. market data from official filings

CIENA CORP (CIEN)

Name: CIENA CORP (CIEN) — Institutional ownership, SEC filings and insider activity
Creator: Sightfile
License: https://www.sec.gov/privacy#dissemination

Institutional ownership, SEC filings and insider activity

Sector: Technology · SEC CIK 0000936395 · EDGAR filings · Updated 2026-07-17

CIENA CORP (CIEN) has reported institutional ownership of 94.8%, with 1,074 institutional managers holding positions valued at $51.8B per the latest 13F reporting period.

Institutional ownership

94.8%

Institutional managers

1,074

Reported 13F value

$51.8B

Insider activity

263 trans.

−$64.6M net selling

Latest updates

2026-07-17 — Insider transaction reported (Form 4)
2026-07-17 — Insider transaction reported (Form 4)
2026-07-17 — Insider transaction reported (Form 4)
2026-07-17 — Insider transaction reported (Form 4)
2026-07-15 — Notice of proposed sale filed (Form 144)
2026-07-15 — Notice of proposed sale filed (Form 144)
2026-07-15 — Notice of proposed sale filed (Form 144)
2026-07-15 — Notice of proposed sale filed (Form 144)

Institutional ownership overview

According to SEC 13F filings tracked by Sightfile, CIENA CORP has 1,074 institutional holders and institutional ownership of 94.8%.

#	Institution	Reported value	% of tracked total
1	FMR LLC	$8.23B	15.9%
2	BlackRock, Inc.	$5.19B	10.0%
3	JPMORGAN CHASE & CO	$3.73B	7.2%
4	VANGUARD CAPITAL MANAGEMENT LLC	$3.56B	6.9%
5	VANGUARD PORTFOLIO MANAGEMENT LLC	$2.86B	5.5%
6	STATE STREET CORP	$2.45B	4.7%
7	PRICE T ROWE ASSOCIATES INC /MD/	$2.04B	3.9%
8	GEODE CAPITAL MANAGEMENT, LLC	$1.58B	3.0%
9	Capital Research Global Investors	$1.07B	2.1%
10	BANK OF AMERICA CORP /DE/	$758.8M	1.5%

Full holder history and quarter-over-quarter changes are available inside the app.

Insider activity

Insiders reported 263 transactions (0 buys, 71 sells) across 17 reporting insiders, with a net reported value of −$64.6M.

Quarterly net insider value, as reported in Form 4 filings.

Fails-to-deliver

The SEC's fails-to-deliver file for 2026-06-30 reports 23 failed-to-deliver shares ($880.8K) for CIEN — an official data point published by the SEC, shown as reported.

Related companies

MOTOROLA SOLUTIONS INC (MSI) · CLOUDFLARE INC (NET) · LUMENTUM HLDGS INC (LITE) · MONOLITHIC PWR SYS INC (MPWR) · NXP SEMICONDUCTORS N V (NXPI) · ELECTRONIC ARTS INC (EA)

See full history, cross-references and alerts on Sightfile

Sightfile provides information only — not investment advice, recommendations, or an assessment of any security. Data is derived from official public sources (SEC EDGAR and U.S. government agencies), may contain errors or delays, and should be verified against the source filing before relying on it.
Data sources: SEC EDGAR (filings, 13F, FTD), aggregated by Sightfile. Page updated 2026-07-17.