| VANGUARD CAPITAL MANAGEMENT LLC |
| 9.2M |
| $4.53B |
| +0.7% |
| 6.523% |
| 0.10% |
| 5 | VANGUARD PORTFOLIO MANAGEMENT LLC | 7.7M | $3.77B | +4.2% | 5.426% | 0.17% |
| 6 | STATE STREET CORP | 6.7M | $3.28B | +5.9% | 4.720% | 0.05% |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | 3.4M | $1.65B | -17.1% | 2.381% | 0.09% |
| 8 | JANE STREET GROUP, LLC | 2.2M | $1.06B | +112.7% | 1.519% | 0.09% |
| 9 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 2.0M | $959.1M | +35.7% | 1.381% | 0.07% |
| 10 | AMERICAN CENTURY COMPANIES INC | 1.9M | $908.4M | +245.6% | 1.308% | 0.40% |
| 11 | BANK OF AMERICA CORP /DE/ | 1.8M | $877.4M | -8.5% | 1.264% | 0.06% |
| 12 | Capital World Investors | 1.8M | $861.2M | +1.8% | 1.240% | 0.10% |
| 13 | Invesco Ltd. | 1.7M | $848.8M | +13.1% | 1.222% | 0.07% |
| 14 | NORGES BANK | 1.7M | $835.5M | — | 1.203% | 0.08% |
| 15 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 1.7M | $822.7M | +20.8% | 1.185% | 0.37% |
| 16 | MORGAN STANLEY | 1.6M | $801.9M | +4.7% | 1.155% | 0.04% |
| 17 | Nuveen, LLC | 1.4M | $682.6M | +64.8% | 0.983% | 0.16% |
| 18 | CITADEL ADVISORS LLC | 1.3M | $651.7M | +58.7% | 0.939% | 0.04% |
| 19 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.2M | $612.7M | -1.8% | 0.882% | 0.08% |
| 20 | NORTHERN TRUST CORP | 1.2M | $597.5M | +2.6% | 0.860% | 0.07% |
| 21 | DIMENSIONAL FUND ADVISORS LP | 1.2M | $565.6M | +0.6% | 0.815% | 0.10% |
| 22 | UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AME | 1.1M | $561.9M | +34.5% | 0.809% | 0.10% |
| 23 | BNP Paribas Asset Management Holding S.A. | 1.1M | $542.1M | +8.2% | 0.781% | 0.54% |
| 24 | AQR CAPITAL MANAGEMENT LLC | 1.1M | $507.2M | +7.7% | 0.743% | 0.18% |
| 25 | GOLDMAN SACHS GROUP INC | 987K | $484.0M | +27.6% | 0.697% | 0.04% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in CIEN — a direct measure of their conviction.
| 93.91% |
| 4.99 pp |
| $7.59B |
| 39% |
| Q4 2024 | 521 | +15% | 98.90% | +0.70 pp | $12.34B | +49% |
| Q3 2024 | 454 | — | 98.20% | — | $8.29B | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
245 institutions opened new positions in CIEN during Q2 2026, while 106 fully exited. 753 added to existing positions and 204 trimmed.
CIEN institutional ownership rose by 0.46 percentage points quarter-over-quarter, with a net change of +152 holders.
The top 10 institutions account for 57.3% of all reported 13F value in CIEN, and the top 25 account for 73.1%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Ciena Corporation (CIEN) Institutional Ownership