Data from public SEC 13F & STOCK Act filings, delayed up to ~45 days, partial holdings only — for research, not investment advice.
CIEN
CIENA CORPData as of 2026 Q1 (03-31) · 13F snapshot
Summary
CIENA CORP (CIEN) is held by 8 tracked hedge-fund managers, a combined reported value of ~$1.16B; the largest are Stephen Mandel, Steven Cohen, Ken Griffin. This quarter: 1 new, 2 added, 4 trimmed. 12 members of Congress have disclosed STOCK Act trades. Data as of 2026 Q1, from public SEC 13F filings, delayed up to ~45 days.
Attention · HighThis quarter · Mixed
Gurus holding8
Congress trades12
Price$445.98vs quarter-end+14.88%
Sectors0
This quarter's moves
Top holderStephen MandelNew1
Added2
Trimmed / sold4
Stephen MandelNew large stake
Value $314.28M2.5% of portfolio809,5222026 Q1
Steven CohenAdd
Value $211.45M0.4% of portfolio544,6552026 Q1
Value $169.38M— of portfolio436,3002026 Q1
Value $101.10M— of portfolio260,4002026 Q1
Value $42.32M— of portfolio109,0002026 Q1
Value $34.94M— of portfolio90,0002026 Q1
Value $32.30M— of portfolio83,2002026 Q1
Value $21.51M— of portfolio55,4002026 Q1
| Investor | Value | % of portfolio | Action |
|---|---|---|---|
| Stephen Mandel | $314.28M | 2.5% | New large stake |
| Steven Cohen | $211.45M | 0.4% | Add |
| Ken GriffinCALL | $169.38M | — | — |
| Ken GriffinPUT | $101.10M | — | — |
| Steven CohenPUT | $42.32M | — | — |
| Izzy EnglanderCALL | $34.94M | — | — |
| Steven CohenCALL | $32.30M | — | — |
| Izzy EnglanderPUT | $21.51M | — | — |