Ciena Corporation
CIENLast close · Oct 16, 2026332.73−23.79 (−6.67%)
Market cap$47.2B
Of the 85 managers this site tracks, 3 held Ciena (CIEN) at the end of Q2 2026, their latest 13Fs. The largest position by value was Bridgewater's, $49.6M; Mairs & Power's ($1.4M) and First Eagle's ($981,120) follow. No Schedule 13D or 13G is on file for CIEN from the activists and large holders the site follows.
Superinvestors holding CIEN
| Manager | Firm | Quarter | Shares | Value |
|---|---|---|---|---|
| Bridgewater | Bridgewater Associates, LP | Q2 2026 | 101,038 | $49.6M |
| Mairs & Power | Mairs & Power Inc | Q2 2026 | 2,800 | $1.4M |
| First Eagle | First Eagle Investment Management, LLC | Q2 2026 | 2,000 | $981,120 |
13D/13G are SEC beneficial-ownership disclosures, triggered only above 5%; a 13F is a quarterly snapshot filed up to 45 days after quarter end. Superinvestor names link to their full portfolios under Investors.