CIEN Ciena Corporation
Ciena Corporation (CIEN) Institutional Ownership
What the institutions did with CIEN last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
Sign in or subscribeLargest holders
| Manager | Shares | % of reported |
|---|---|---|
| FMR LLC | 19.1M | 14.5% |
| BlackRock, Inc. | 12.7M | 9.6% |
| JPMORGAN CHASE & CO | 11.2M | 8.5% |
| VANGUARD CAPITAL MANAGEMENT LLC | 9.2M | 7.0% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 7.7M | 5.8% |
| STATE STREET CORP | 6.7M | 5.1% |
| PRICE T ROWE ASSOCIATES INC /MD/ | 4.1M | 3.1% |
| GEODE CAPITAL MANAGEMENT, LLC | 3.4M | 2.6% |
| AMERICAN CENTURY COMPANIES INC | 1.9M | 1.4% |
| BANK OF AMERICA CORP /DE/ | 1.8M | 1.4% |
| Capital World Investors | 1.8M | 1.3% |
| Invesco Ltd. | 1.7M | 1.3% |
| NORGES BANK | 1.7M | 1.3% |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 1.7M | 1.3% |
| MORGAN STANLEY | 1.6M | 1.2% |
| Nuveen, LLC | 1.4M | 1.1% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.2M | 0.9% |
| NORTHERN TRUST CORP | 1.2M | 0.9% |
| DIMENSIONAL FUND ADVISORS LP | 1.2M | 0.9% |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 1.1M | 0.9% |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 1.1M | 0.8% |
| AQR CAPITAL MANAGEMENT LLC | 1.1M | 0.8% |
| GOLDMAN SACHS GROUP INC | 946.6K | 0.7% |
| Legal & General Group Plc | 887.1K | 0.7% |
| Bank of New York Mellon Corp | 825.5K | 0.6% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| FMR LLC | Reduced | 21.2M | 19.1M | -2.1M |
| Capital Research Global Investors | Reduced | 2.8M | 656.6K | -2.1M |
| AMERICAN CENTURY COMPANIES INC | Increased | 535.8K | 1.9M | +1.3M |
| PRICE T ROWE ASSOCIATES INC /MD/ | Reduced | 5.2M | 4.1M | -1.2M |
| Jericho Capital Asset Management L.P. | Reduced | 1.7M | 561.5K | -1.1M |
| JPMORGAN CHASE & CO | Increased | 10.2M | 11.2M | +979.6K |
| LONE PINE CAPITAL LLC | Sold Out | 809.5K | 0 | -809.5K |
| Polar Capital Holdings Plc | Sold Out | 798.4K | 0 | -798.4K |
| GEODE CAPITAL MANAGEMENT, LLC | Reduced | 4.1M | 3.4M | -695.1K |
| BlackRock, Inc. | Reduced | 13.4M | 12.7M | -655.3K |
| Nuveen, LLC | Increased | 844.2K | 1.4M | +547.2K |
| VOYA INVESTMENT MANAGEMENT LLC | Reduced | 1.2M | 731.6K | -473.5K |
| ALLIANCEBERNSTEIN L.P. | Reduced | 527.4K | 146.1K | -381.3K |
| STATE STREET CORP | Increased | 6.3M | 6.7M | +371.5K |
| Pictet Asset Management Holding SA | Increased | 59.8K | 414.7K | +354.9K |
| Point72 Asset Management, L.P. | Reduced | 544.7K | 210.5K | -334.1K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 7.4M | 7.7M | +311.5K |
| Man Group plc | Increased | 23.4K | 334.8K | +311.4K |
| Anatole Investment Management Ltd | Reduced | 313.4K | 2.8K | -310.7K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | Increased | 851.9K | 1.1M | +293.5K |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Increased | 1.4M | 1.7M | +288.6K |
| UBS Group AG | Reduced | 648.2K | 362.3K | -285.9K |
| Qube Research & Technologies Ltd | New | 0 | 282.9K | +282.9K |
| SG Americas Securities, LLC | Increased | 190.9K | 470.0K | +279.1K |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | Reduced | 398.6K | 133.8K | -264.8K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.