Company · Ownership research

CIENA CORP CIEN

CIK 0000936395 · CUSIP 171779309

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 171779309 (CIEN), not CUSIP 171779909 (CIEN), CUSIP 171779959 (CIEN), and does not merge CUSIPs.

This page lists the top 20 of 549 rows by value; the complete set is available through the API.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$1.18B 3,370,470 shares	0.06%	+8(0.00%)Added	SEC filing ↗ Nov 6, 2026	▾
02	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$399.47M 1,135,250 shares	0.07%	-17.98K(-1.60%)Reduced	SEC filing ↗ Nov 4, 2026	▾
03	Bank of New York Mellon Corp CIK 1390777 · View history	$276.49M 785,889 shares	0.05%	-39.59K(-4.80%)Reduced	SEC filing ↗ Nov 5, 2026	▾
04	Amundi CIK 1330387 · View history	$263.29M 748,359 shares	0.05%	+73.25K(+10.90%)Added	SEC filing ↗ Nov 6, 2026	▾
05	DEUTSCHE BANK AG\ CIK 948046 · View history	$238.64M 678,295 shares	0.07%	+103.25K(+18.00%)Added	SEC filing ↗ Nov 6, 2026	▾
06	Pictet Asset Management Holding SA CIK 1993888 · View history	$180.24M 512,203 shares	0.17%	+97.50K(+23.50%)Added	SEC filing ↗ Nov 3, 2026	▾
07	WEALTH ENHANCEMENT ADVISORY SERVICES, LLC CIK 1632972 · View history	$160.30M 388,761 shares	0.24%	+8.78K(+2.30%)Added	SEC filing ↗ Oct 13, 2026	▾
08	CITIGROUP INC CIK 831001 · View history	$154.63M 439,526 shares	0.07%	+142.99K(+48.20%)Added	SEC filing ↗ Nov 4, 2026	▾
09	Mitsubishi UFJ Asset Management Co., Ltd. CIK 1466546 · View history	$129.55M 368,233 shares	0.07%	+25.24K(+7.40%)Added	SEC filing ↗ Nov 5, 2026	▾
10	Robeco Institutional Asset Management B.V. CIK 1418773 · View history	$116.90M 332,271 shares	0.14%	+12.99K(+4.10%)Added	SEC filing ↗ Oct 20, 2026	▾
11	Sumitomo Mitsui Trust Group, Inc. CIK 1475365 · View history	$115.16M 327,337 shares	0.07%	-30.10K(-8.40%)Reduced	SEC filing ↗ Oct 29, 2026	▾
12	Assenagon Asset Management S.A. CIK 1546007 · View history	$93.72M 266,384 shares	0.09%	+52.38K(+24.50%)Added	SEC filing ↗ Oct 15, 2026	▾
13	BARCLAYS PLC CIK 312069 · View history	$88.90M 252,700 shares	0.03%	-25.38K(-9.10%)Reduced	SEC filing ↗ Nov 6, 2026	▾
14	FengHe Fund Management Pte. Ltd. CIK 1660531 · View history	$77.82M 221,194 shares	3.77%	+169.53K(+328.10%)Added	SEC filing ↗ Nov 2, 2026	▾
15	Amanah Holdings Trust CIK 2076121 · View history	$70.36M 200,000 shares	3.94%	0(0.00%)Unchanged	SEC filing ↗ Oct 23, 2026	▾
16	Williams Jones Wealth Management, LLC. CIK 1788587 · View history	$66.01M 187,632 shares	0.74%	-8.13K(-4.20%)Reduced	SEC filing ↗ Nov 5, 2026	▾
17	Allspring Global Investments Holdings, LLC CIK 1890906 · View history	$62.89M 165,887 shares	0.10%	+135.22K(+440.90%)Added	SEC filing ↗ Nov 4, 2026	▾
18	PRINCIPAL FINANCIAL GROUP INC CIK 1126328 · View history	$52.39M 148,921 shares	0.03%	-16.40K(-9.90%)Reduced	SEC filing ↗ Nov 2, 2026	▾
19	Aberdeen Group plc CIK 1716774 · View history	$47.37M 134,651 shares	0.07%	+115.09K(+588.20%)Added	SEC filing ↗ Nov 6, 2026	▾
20	TRUIST FINANCIAL CORP CIK 92230 · View history	$47.19M 134,127 shares	0.06%	+127.38K(+1,887.10%)Added	SEC filing ↗ Oct 30, 2026	▾

Showing 20 / 549 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

549

Cancelled or null records excluded

Disclosed shares

15,365,152

Not deduplicated across managers

Disclosed value

$5.43B

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

CIENA CORP · Q3 2026

Explore all 549 reporting institutions.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.