Ranked by reported Q2 2026 13F market value
Share of total reported institutional value in CIEN held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | FMR LLC | 19.1M | $9.38B | -9.9% | 13.503% | 0.41% |
| 2 | BlackRock, Inc. | 12.7M | $6.24B | -4.9% | 8.985% | 0.09% |
| 3 | JPMORGAN CHASE & CO | 11.2M | $5.37B | +9.6% | 7.917% | 0.30% |
| 4 | 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.
Filings activity in CIEN during Q2 2026, grouped by how each filer changed its position.
Institutions that opened a new CIEN position in Q2 2026
Institutions that fully closed their CIEN position in Q2 2026
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q2 2026 | 1,236 | +14% | 98.03% | +0.46 pp | $64.81B | +29% |
| Q1 2026 | 1,084 | +30% | 97.57% | 12.77 pp | $50.40B | +62% |
| Q4 2025 | 837 | +23% | 110.34% | +9.24 pp | $31.18B | +58% |
| Q3 2025 | 680 | +22% | 101.10% | +1.30 pp | $19.76B | +79% |
| Q2 2025 | 557 | +5.3% | 99.80% | +5.89 pp | $11.05B | +46% |
| Q1 2025 | 529 | +1.5% | 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.
Quick answers to the most common questions about buying CIEN stock.
Based on Q2 2026 13F filings, institutional ownership of Ciena Corporation stands at 98.0%, held across 1,236 reporting institutions.
FMR LLC is the largest reported institutional holder of CIEN, with approximately 19,113,538 shares worth $9.38B as of Q2 2026.
Yes — 3 widely-followed marquee investors appear among the top 25 institutional holders of CIEN, including JANE STREET GROUP, LLC, SUSQUEHANNA INTERNATIONAL GROUP, LLP, CITADEL ADVISORS LLC.
Our composite Smart Money Score for CIEN is 81 out of 100 (Strong Smart Money). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
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