Ciena Corporation (CIEN) ownership: Top institutional holder: FMR LLC ($8.23B). Insider activity: Net Seller (0 buys, 20 sells). 9 recent congressional STOCK Act disclosures. SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| FMR LLC | 21209756.00 | $8.23B | 2026-03-31 |
| BlackRock, Inc. | 13373787.00 | $5.19B | 2026-03-31 |
| JPMORGAN CHASE & CO | 10226649.00 | $3.73B | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 9169355.00 | $3.56B | 2026-03-31 |
| VANGUARD GROUP INC | 14376579.00 | $3.36B | 2025-12-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 7369124.00 | $2.86B | 2026-03-31 |
| STATE STREET CORP | 6309050.00 | $2.45B | 2026-03-31 |
| GEODE CAPITAL MANAGEMENT, LLC | 4065559.00 | $1.58B | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-01 | |
| Sell | null | 2026-05-15 | |
| Sell | null | 2026-05-15 | |
| Sell | null | 2026-05-15 | |
| Sell | null | 2026-05-15 |
Back to CIEN overview · CIEN earnings · All congressional trades
Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.