34 institutions reported holding $171.3M of CIENA CORP (CIEN) in SEC 13F filings for 2026-06-30. Largest institutional holders: Assenagon Asset Management S.A. ($105.0M), Czech National Bank ($19.7M), UNICOM Systems, Inc. ($17.3M), PensionDanmark Pensionsforsikringsaktieselskab ($13.4M), GAMMA Investing LLC ($2.8M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Assenagon Asset Management S.A. | $105.0M | 214,002 | Trimmed |
| 2 | Czech National Bank | $19.7M | 40,247 | Added |
| 3 | UNICOM Systems, Inc. | $17.3M | 35,231 | Added |
| 4 | PensionDanmark Pensionsforsikringsaktieselskab | $13.4M | 27,410 | New |
| 5 | GAMMA Investing LLC | $2.8M | 5,759 | Added |
| 6 | Castle Rock Wealth Management, LLC | $2.8M | 5,978 | Added |
| 7 | Polianta Ltd | $2.0M | 4,000 | New |
| 8 | TLWM | $1.2M | 2,528 | New |
| 9 | TRUST POINT INC. | $840,327 | 1,713 | Trimmed |
| 10 | Trust Asset Management LLC | $786,841 | 1,565 | New |
| 11 | Central Pacific Bank - Trust Division | $648,520 | 1,322 | Trimmed |
| 12 | CoreCap Advisors, LLC | $612,219 | 1,248 | Added |
| 13 | Valeo Financial Advisors, LLC | $513,616 | 1,047 | Added |
| 14 | Cooper Financial Group | $445,428 | 908 | Added |
| 15 | Quantum Financial Advisors, LLC | $390,486 | 796 | Hold |
| 16 | Versant Capital Management, Inc | $367,920 | 750 | Added |
| 17 | GK Wealth Management LLC | $363,096 | 740 | New |
| 18 | CX Institutional | $357,000 | 728 | Added |
| 19 | MassMutual Private Wealth & Trust, FSB | $330,637 | 674 | Trimmed |
| 20 | Bison Wealth, LLC | $300,644 | 693 | Trimmed |
| 21 | FNY Investment Advisers, LLC | $297,000 | 608 | New |
| 22 | BEACON INVESTMENT ADVISORY SERVICES, INC. | $277,167 | 565 | Added |
| 23 | Dynamic Advisor Solutions LLC | $206,412 | 421 | Trimmed |
| 24 | Hilltop National Bank | $147,659 | 301 | Added |
| 25 | Dogwood Wealth Management LLC | $64,754 | 132 | Hold |
Source: SEC Form 13F filings · as of 2026-06-30