Who owns CIEN
Institutions that file 13Fs hold 93% of the shares
Shares they hold, quarter on quarter
-1.5%
262 new, 454 added, 369 cut, 121 sold out
Top 10 holders
59%
of the shares institutions hold
A 13F lists the long positions of managers with more than $100M in US stocks. It shows the last day of a quarter and is filed up to 45 days later. Two managers can report the same shares, so totals can count some shares twice.
Institutional owners
The 25 biggest holders
| Holder | Shares | Value | % of company | From Mar 31, 2026 |
|---|---|---|---|---|
| FMR LLC | 19.11M | $9.4B | 13.48% | Reduced -9.9% |
| BlackRock, Inc. | 12.72M | $6.2B | 8.97% | Reduced -4.9% |
| JPMORGAN CHASE & CO | 11.21M | $5.4B | 7.90% | Added +9.6% |
| VANGUARD CAPITAL MANAGEMENT LLC | 9.23M | $4.5B | 6.51% | Added +0.7% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 7.68M | $3.8B | 5.42% | Added +4.2% |
| STATE STREET CORP | 6.68M | $3.3B | 4.71% | Added +5.9% |
| PRICE T ROWE ASSOCIATES INC /MD/ | 4.07M | $2.0M | 2.87% | Reduced -22.3% |
| GEODE CAPITAL MANAGEMENT, LLC | 3.37M | $1.6B | 2.38% | Reduced -17.1% |
| AMERICAN CENTURY COMPANIES INC | 1.85M | $908.4M | 1.31% | Added +245.6% |
| BANK OF AMERICA CORP /DE/ | 1.79M | $877.4M | 1.26% | Reduced -8.5% |
| Capital World Investors | 1.76M | $861.2M | 1.24% | Added +1.8% |
| Invesco Ltd. | 1.73M | $848.8M | 1.22% | Added +13.1% |
| NORGES BANK | 1.70M | $835.5M | 1.20% | New |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 1.68M | $822.7M | 1.18% | Added +20.8% |
| MORGAN STANLEY | 1.63M | $801.9M | 1.15% | Added +4.7% |
| Nuveen, LLC | 1.39M | $682.6M | 0.98% | Added +64.8% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.25M | $612.7M | 0.88% | Reduced -1.8% |
| NORTHERN TRUST CORP | 1.22M | $597.5M | 0.86% | Added +2.6% |
| DIMENSIONAL FUND ADVISORS LP | 1.15M | $565.6M | 0.81% | Added +0.6% |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 1.15M | $561.9M | 0.81% | Added +34.5% |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 1.11M | $542.1M | 0.78% | Added +8.2% |
| AQR CAPITAL MANAGEMENT LLC | 1.05M | $507.2M | 0.74% | Added +7.7% |
| GOLDMAN SACHS GROUP INC | 947K | $464.4M | 0.67% | Added +22.4% |
| Legal & General Group Plc | 887K | $435.2M | 0.63% | Added +36.8% |
| Bank of New York Mellon Corp | 825K | $404.9M | 0.58% | Reduced -10.9% |
Show the other 15 holders
This quarter
Who bought and who sold the most shares
Bought the most shares
- NORGES BANK +1.70M, new
- AMERICAN CENTURY COMPANIES INC +1.32M
- JPMORGAN CHASE & CO +980K
- Nuveen, LLC +547K
- STATE STREET CORP +372K
- Pictet Asset Management Holding SA +355K
- VANGUARD PORTFOLIO MANAGEMENT LLC +312K
- Man Group plc +311K
- UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC +294K
- ARROWSTREET CAPITAL, LIMITED PARTNERSHIP +289K
Sold the most shares
- FMR LLC -2.10M
- Capital Research Global Investors -2.09M
- PRICE T ROWE ASSOCIATES INC /MD/ -1.17M
- Jericho Capital Asset Management L.P. -1.09M
- LONE PINE CAPITAL LLC -810K, sold out
- Polar Capital Holdings Plc -798K, sold out
- GEODE CAPITAL MANAGEMENT, LLC -695K
- BlackRock, Inc. -655K
- VOYA INVESTMENT MANAGEMENT LLC -473K
- ALLIANCEBERNSTEIN L.P. -381K
Superinvestors
Superinvestors holding CIEN
| Investor | Quarter | Shares | Value | % of portfolio | Last quarter |
|---|---|---|---|---|---|
| First Eagle First Eagle Investment Management | Jun 30, 2026 | 4K | $2.0M | 0.00% | Added +53.9% |
Sold out last quarter: Stephen Mandel
More than 5%
13D filings: owners who may push for change
No Schedule 13D about CIEN in the last year.