Ranked by reported Q1 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 | 21.2M | $8.23B | +0.4% | 14.984% | 0.44% |
| 2 | BlackRock, Inc. | 13.4M | $5.19B | -19.8% | 9.448% | 0.09% |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | 9.2M | $3.56B | β | 6.478% | 0.09% |
| 4 | VANGUARD PORTFOLIO MANAGEMENT LLC | 7.4M | $2.86B | β | 5.206% | 0.15% |
| 5 | STATE STREET CORP | 6.3M | $2.45B | +23.6% | 4.457% | 0.08% |
| 6 | GEODE CAPITAL MANAGEMENT, LLC | 4.1M | $1.58B | +51.3% | 2.872% | 0.10% |
| 7 | Capital Research Global Investors | 2.8M | $1.07B | β | 1.943% | 0.17% |
| 8 | BANK OF AMERICA CORP /DE/ | 2.0M | $758.8M | -9.7% | 1.381% | 0.06% |
| 9 | Capital World Investors | 1.7M | $669.6M | -7.7% | 1.218% | 0.09% |
| 10 | Jericho Capital Asset Management L.P. | 1.7M | $643.0M | 0.0% | 1.170% | 9.50% |
| 11 | MORGAN STANLEY | 1.6M | $606.2M | +12.8% | 1.103% | 0.04% |
| 12 | Invesco Ltd. | 1.5M | $594.1M | +0.8% | 1.081% | 0.09% |
| 13 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 1.4M | $559.5M | +22.8% | 1.018% | 0.06% |
| 14 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 1.4M | $539.0M | -37.9% | 0.981% | 0.29% |
| 15 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.3M | $493.9M | +36.0% | 0.899% | 0.08% |
| 16 | VOYA INVESTMENT MANAGEMENT LLC | 1.2M | $467.9M | +27.3% | 0.851% | 0.49% |
| 17 | NORTHERN TRUST CORP | 1.2M | $460.9M | -2.4% | 0.839% | 0.06% |
| 18 | DIMENSIONAL FUND ADVISORS LP | 1.1M | $444.7M | -18.0% | 0.810% | 0.09% |
| 19 | BNP Paribas Asset Management Holding S.A. | 1.0M | $396.6M | -48.2% | 0.722% | 0.46% |
| 20 | AQR CAPITAL MANAGEMENT LLC | 977K | $374.5M | -30.8% | 0.690% | 0.17% |
| 21 | Bank of New York Mellon Corp | 927K | $359.8M | -17.1% | 0.655% | 0.07% |
| 22 | UBS ASSET MANAGEMENT AMERICAS INC | 852K | $330.7M | +22.1% | 0.602% | 0.07% |
| 23 | Nuveen, LLC | 844K | $327.7M | -6.0% | 0.596% | 0.09% |
| 24 | LONE PINE CAPITAL LLC | 810K | $314.3M | β | 0.572% | 2.51% |
| 25 | Polar Capital Holdings Plc | 798K | $310.0M | -38.1% | 0.564% | 1.10% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). β% of Fundβ shows how much of that investorβs total 13F portfolio is invested in CIEN β a direct measure of their conviction.
Filings activity in CIEN during Q1 2026, grouped by how each filer changed its position.
Institutions that opened a new CIEN position in Q1 2026
Institutions that fully closed their CIEN position in Q1 2026
8 quarters of 13F filings Β· Ξ columns show change vs prior quarter
| Quarter | Inst. Holders | Ξ Holders | Ownership % | Ξ Ownership | Total 13F Value | Ξ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 1,057 | +28% | 72.47% | +24.30 pp | $45.75B | +50% |
| Q4 2025 | 823 | +23% | 48.17% | +17.70 pp | $30.41B | +58% |
| Q3 2025 | 669 | +20% | 30.47% | +12.97 pp | $19.24B | +74% |
| Q2 2025 | 557 | +5.3% | 17.50% | +5.48 pp | $11.05B | +46% |
| Q1 2025 | 529 | +1.5% | 12.02% | 7.53 pp | $7.59B | 39% |
| Q4 2024 | 521 | +15% | 19.55% | +6.41 pp | $12.34B | +49% |
| Q3 2024 | 454 | +1.1% | 13.14% | +3.20 pp | $8.29B | +32% |
| Q2 2024 | 449 | β | 9.94% | β | $6.28B | β |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Ξ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying CIEN stock.
Based on Q1 2026 13F filings, institutional ownership of Ciena Corporation stands at 72.5%, held across 1,057 reporting institutions.
FMR LLC is the largest reported institutional holder of CIEN, with approximately 21,209,756 shares worth $8.23B as of Q1 2026.
Yes β 2 widely-followed marquee investors appear among the top 25 institutional holders of CIEN, including SUSQUEHANNA INTERNATIONAL GROUP, LLP, LONE PINE CAPITAL 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.
330 institutions opened new positions in CIEN during Q1 2026, while 96 fully exited. 594 added to existing positions and 130 trimmed.
CIEN institutional ownership rose by 24.30 percentage points quarter-over-quarter, with a net change of +234 holders.
The top 10 institutions account for 59.0% of all reported 13F value in CIEN, and the top 25 account for 73.4%.
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