Who owns Ciena (CIEN)?
147 holders named in SEC filings declare between 65.2% and 83.9% of Ciena's shares outstanding, as of Sep 20, 2026. The largest are Fidelity (FMR) (13.5%), Vanguard (13.0%) and BlackRock (9.0%); the five largest hold 44.1% together. Another 1,074 institutions hold small positions worth 5.8%. At least 10.3% of the shares appear in no ownership filing: investors who do not have to report, mostly individuals. From Mar 31, 2026 to Jun 30, 2026, institutions that filed both quarters bought 8.9% and sold 11.6% of the shares, a net sale of 2.7%; 237 opened a position, 448 added, 374 reduced and 98 sold out. Biggest buyers: American Century Companies, Inc. (+1.3M shares) and JPMorgan (+979,560 shares). Biggest sellers: Fidelity (FMR) (-2.1M) and Capital Group (-2.1M). Schedule 13D/G filings since Mar 31, 2026: JPMORGAN CHASE & CO. fell below 5% (4.0% still declared) on Aug 31, 2026 and FMR LLC crossed 5% (13.5%) on Jun 30, 2026. Over time, 1,205 managers declared Ciena in their 13F for Q2 2026, against 398 for Q4 2019: together at most 93.3% of the shares outstanding, against 91.5%.
| Holder | Filing | Share of capital | As of | Holding since (13F) |
|---|---|---|---|---|
| Fidelity (FMR) | 13F | 13.5% | Jun 30, 2026 | Q4 2019 or earlier |
| Vanguard | 13F | 13.0% | Jun 30, 2026 | Q4 2019 or earlier |
| BlackRock | 13F | 9.0% | Jun 30, 2026 | Q4 2019 or earlier |
| State Street | 13F | 4.7% | Jun 30, 2026 | Q4 2019 or earlier |
| JPMorgan | 13G | 4.0% | Aug 31, 2026 | — |
| T. Rowe Price | 13F | 3.1% | Jun 30, 2026 | Q4 2019 or earlier |
| Geode Capital | 13F | 2.4% | Jun 30, 2026 | Q4 2019 or earlier |
| Capital Group | 13F | 1.7% | Jun 30, 2026 | Q1 2025 |
| American Century Companies, Inc. | 13F | 1.3% | Jun 30, 2026 | Q4 2019 or earlier |
| Bank of America | 13F | 1.3% | Jun 30, 2026 | Q4 2019 or earlier |
| Invesco | 13F | 1.2% | Jun 30, 2026 | Q4 2019 or earlier |
| Norges Bank | 13F | 1.2% | Jun 30, 2026 | Q2 2024 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 13F | 1.2% | Jun 30, 2026 | Q4 2023 |
| Morgan Stanley | 13F | 1.2% | Jun 30, 2026 | Q4 2019 or earlier |
| UBS | 13F | 1.1% | Jun 30, 2026 | Q4 2019 or earlier |
| Nuveen | 13F | 0.98% | Jun 30, 2026 | Q4 2019 or earlier |
| Charles Schwab | 13F | 0.88% | Jun 30, 2026 | Q4 2019 or earlier |
| Northern Trust | 13F | 0.86% | Jun 30, 2026 | Q4 2019 or earlier |
| Dimensional | 13F | 0.81% | Jun 30, 2026 | Q4 2019 or earlier |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 13F | 0.78% | Jun 30, 2026 | Q4 2019 or earlier |
| AQR | 13F | 0.74% | Jun 30, 2026 | Q4 2019 or earlier |
| Goldman Sachs | 13F | 0.67% | Jun 30, 2026 | Q4 2019 or earlier |
| Legal & General | 13F | 0.63% | Jun 30, 2026 | Q4 2019 or earlier |
| BNY | 13F | 0.58% | Jun 30, 2026 | Q4 2019 or earlier |
| VOYA INVESTMENT MANAGEMENT LLC | 13F | 0.52% | Jun 30, 2026 | Q4 2019 or earlier |
Ciena institutional ownership over time
| Quarter | 13F managers | Share of the company (upper bound) | Value declared | Held by stock pickers |
|---|---|---|---|---|
| Q4 2019 | 398 | 91.5% | $6.0B | 62.0% |
| Q4 2020 | 442 | 90.4% | $7.4B | 62.7% |
| Q4 2021 | 499 | 86.7% | $10.3B | 62.1% |
| Q4 2022 | 450 | 93.8% | $7.1B | 63.4% |
| Q4 2023 | 443 | 92.5% | $6.0B | 61.8% |
| Q4 2024 | 525 | 98.7% | $11.9B | 62.4% |
| Q4 2025 | 841 | 97.5% | $32.1B | 61.4% |
| Q2 2026 | 1,205 | 93.3% | $64.6B | 56.1% |
From SEC Form 13F, every quarter since the end of 2019, read like the current quarter: entities of a house summed, a value contradicting its share count set aside. The share of the company is an upper bound — two managers can declare the same shares — over the shares outstanding at that date.