CIEN Ciena Corporation

NYSE

$379.14

Ciena Corporation (CIEN) SEC Filings

Everything CIEN has filed with the SEC, newest first. An 8-K shows what it was about where we have classified it — an earnings release and a change of chief executive are both 8-Ks, and the form number alone doesn't separate them.

100 filings
Date	Form	Filing
Sep 29, 2026	4	View filing
Sep 28, 2026	4	View filing
Sep 25, 2026	144	View filing
Sep 25, 2026	4	View filing
Sep 23, 2026	144	View filing
Sep 22, 2026	4	View filing
Sep 22, 2026	4	View filing
Sep 22, 2026	4	View filing
Sep 22, 2026	4	View filing
Sep 22, 2026	4	View filing
Sep 22, 2026	4	View filing
Sep 22, 2026	4	View filing
Sep 22, 2026	4	View filing
Sep 22, 2026	4	View filing
Sep 17, 2026	4	View filing
Sep 17, 2026	4	View filing
Sep 17, 2026	4	View filing
Sep 17, 2026	4	View filing
Sep 16, 2026	144	View filing
Sep 15, 2026	144	View filing
Sep 15, 2026	144	View filing
Sep 15, 2026	144	View filing
Sep 3, 2026	10-Q	View filing
Sep 3, 2026	SCHEDULE 13G/A	View filing
Sep 3, 2026	8-K Earnings Release · Guidance Update · Investor Presentation	View filing
Sep 2, 2026	4	View filing
Aug 18, 2026	4	View filing
Aug 18, 2026	4	View filing
Aug 18, 2026	4	View filing
Aug 18, 2026	4	View filing
Aug 4, 2026	4	View filing
Aug 4, 2026	4	View filing
Jul 17, 2026	4	View filing
Jul 17, 2026	4	View filing
Jul 17, 2026	4	View filing
Jul 17, 2026	4	View filing
Jul 6, 2026	4	View filing
Jul 6, 2026	4	View filing
Jul 6, 2026	4	View filing
Jul 6, 2026	4	View filing
Jun 30, 2026	4	View filing
Jun 26, 2026	4	View filing
Jun 23, 2026	4	View filing
Jun 23, 2026	4	View filing
Jun 23, 2026	4	View filing
Jun 23, 2026	4	View filing
Jun 23, 2026	4	View filing
Jun 23, 2026	4	View filing
Jun 23, 2026	4	View filing
Jun 23, 2026	4	View filing
Jun 23, 2026	4	View filing
Jun 17, 2026	4	View filing
Jun 17, 2026	4	View filing
Jun 17, 2026	4	View filing
Jun 4, 2026	10-Q	View filing
Jun 2, 2026	4	View filing
May 19, 2026	4	View filing
May 19, 2026	4	View filing
May 19, 2026	4	View filing
May 4, 2026	4	View filing
Apr 17, 2026	4	View filing
Apr 17, 2026	4	View filing
Apr 17, 2026	4	View filing
Apr 16, 2026	4	View filing
Apr 3, 2026	4	View filing
Apr 3, 2026	4	View filing
Apr 3, 2026	4	View filing
Mar 31, 2026	4	View filing
Mar 30, 2026	4	View filing
Mar 30, 2026	4	View filing
Mar 30, 2026	4	View filing
Mar 30, 2026	4	View filing
Mar 30, 2026	4	View filing
Mar 30, 2026	4	View filing
Mar 30, 2026	4	View filing
Mar 30, 2026	4	View filing
Mar 25, 2026	4	View filing
Mar 24, 2026	4	View filing
Mar 24, 2026	4	View filing
Mar 24, 2026	4	View filing
Mar 24, 2026	4	View filing
Mar 24, 2026	4	View filing
Mar 24, 2026	4	View filing
Mar 24, 2026	4	View filing
Mar 24, 2026	4	View filing
Mar 18, 2026	4	View filing
Mar 18, 2026	4	View filing
Mar 5, 2026	10-Q	View filing
Mar 4, 2026	4	View filing
Feb 19, 2026	4	View filing
Feb 19, 2026	4	View filing
Feb 4, 2026	4	View filing
Jan 20, 2026	4	View filing
Jan 20, 2026	4	View filing
Jan 20, 2026	4	View filing
Jan 16, 2026	4	View filing
Jan 13, 2026	4	View filing
Jan 13, 2026	4	View filing
Jan 13, 2026	4	View filing
Jan 6, 2026	4	View filing

Filings are sourced from EDGAR and open on the SEC's own site. Classification of 8-K events is ours and is not part of the filing.