Ciena Corp
CIEN · US
Ciena Corp is held by 5 of the 24 tracked investors in their latest 13F filings. The largest position is Norges Bank's at $835M, 0.08% of that portfolio. Versus the prior quarter, 1 added, 4 trimmed and 0 bought new. In the last 90 days insiders sold 1 times ($1.3M) and bought 0 times on the open market.
Big investors holding this stock
Latest 13F of the 24 tracked investors. Common shares only.
| Investor | Value ($) | vs prior quarter |
|---|---|---|
| Norges Bank weight 0.08% · Q2 2026 |
835M | ▲ 110% |
| National Pension Service (Korea) weight 0.09% · Q2 2026 |
134M | ▼ 9% |
| Korea Investment Corporation weight 0.11% · Q2 2026 |
59.8M | ▼ 1% |
| Bridgewater Associates weight 0.20% · Q2 2026 |
49.6M | ▼ 30% |
| Temasek Holdings weight 0.02% · Q2 2026 |
6.5M | ▼ 70% |
Insider trades (90 days)
SEC Form 4| Insider | Trade | Amount ($) |
|---|---|---|
| Nevens Thomas Michael Director · 9/23 |
Sell | 1.3M |
Questions
Which big investors own Ciena Corp?
Norges Bank ($835M), National Pension Service (Korea) ($134M), Korea Investment Corporation ($59.8M), Bridgewater Associates ($49.6M), Temasek Holdings ($6.5M), per their latest 13F filings.
Does Warren Buffett own Ciena Corp?
Berkshire Hathaway did not report it in its latest 13F.
Does Korea's National Pension Service own Ciena Corp?
Yes, $134M as of 2026-06-30 (0.09% of its US holdings).
Have Ciena Corp insiders been selling?
1 open-market sales ($1.3M) and 0 purchases in the last 90 days; 0 of the sales were under pre-arranged 10b5-1 plans.
Restated and computed from SEC (13F, 13D/G, Form 4) and DART filings and NPS public data. Filings describe a past date and may differ from current holdings (13F: quarter end, up to 45 days later). Not investment advice.
Sources: SEC EDGAR, DART, data.go.kr (NPS), OpenFIGI. See Methodology for how figures are computed.