PEAK6 LLC
- SEC CIK
- 0001389958
- Latest filing
- Aug 12, 2026
CIEN holding history
Ciena Corp in every 13F filed by PEAK6 LLC, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.
CIEN overviewAll 13F holders of CIENFull Q2 2026 holdings
- Shares (Q2 2026)
- 44,570
- Value
- $21.9M
- % of portfolio
- 0.5%
- Quarters held
- 5
- Since Q2 2025
| Quarter | Shares | Value | % of portfolio | Share change | Action | All holders |
|---|---|---|---|---|---|---|
| Q2 2026 | 44,570 | $21.9M | 0.5% | +42,141+1,734.9% | Added | Holders |
| Q1 2026 | 2,429 | $943.0K | <0.1% | −127,065−98.1% | Reduced | Holders |
| Q4 2025 | 129,494 | $30.3M | 0.8% | +127,140+5,401.0% | Added | Holders |
| Q3 2025 | 2,354 | $342.9K | <0.1% | −163,952−98.6% | Reduced | Holders |
| Q2 2025 | 166,306 | $13.5M | 0.5% | +166,306 | New | Holders |