← Super investors
CIEN
Ciena Corp
4 super-investor ownerscombined $371Mlargest position 2.5%
1 NEW
Cohort owners over time
2021Q4 → 2026Q1How many of the cohort members held this stock each quarter.
Now: 1
Peak: 1
Owners (4) · click any column to sort
| #↑ | Manager | % Port. | History | Value | Shares |
|---|---|---|---|---|---|
| 1 | Stephen Mandel | 2.5% | 2q | $314M | 809,522 |
| 2 | Joel Greenblatt | <0.1% | 38q | $55M | 140,435 |
| 3 | Mairs & Power Funds | <0.1% | 4q | $1M | 2,800 |
| 4 | First Eagle Investment Management | <0.1% | 10q | $1M | 2,600 |
Recent activity (1)
| Manager | Move | % Port. | Δ Shares | Value | Filed |
|---|---|---|---|---|---|
| Stephen Mandel | NEW | 2.5% | +100% | $314M | May 15, 2026 |
Long US equity 13F-HR filings only. CUSIP 171779309. Not investment advice.