BlackRock, Inc.'s ownership history for CIEN

BlackRock, Inc. currently holds 16.7M shares with a market value of $3.9B. It started holding CIEN on 2024-09-30. At its peak, it held 17.1M shares on 2024-12-31. Its highest holding value was $3.9B on 2025-12-31. At its lowest, it held 14.5M shares on 2025-11-30, with a value of $994.8M on 2024-09-30. In the recent 180 days, BlackRock, Inc. has increased its shares by 1.1M. In the recent year, BlackRock, Inc. has decreased its shares by 370.5K.