Back to CIEN researchManagerReported valueSharesFiling period Arrowstreet Capital, Limited Partnership$539M1.39M2026-03-31Dimensional Fund Advisors LP$445M1.15M2026-03-31UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AME$331M852K2026-03-31Lone Pine Capital$314M810K2026-03-31Point72 Asset Management$211M545K2026-03-31American Century Companies Inc$208M536K2026-03-31Swiss National Bank$160M413K2026-03-31Sumitomo Mitsui Trust Group, Inc.$125M322K2026-03-31Mitsubishi UFJ Asset Management Co., Ltd.$123M317K2026-03-31HSBC Holdings PLC$86.5M223K2026-03-31Principal Financial Group Inc$81.1M165K2026-06-30Bridgewater Associates$55.8M144K2026-03-31Legal & General Group Plc$17.1M363K2023-09-30BNP Paribas Financial Markets$2.5M51.48K2024-06-30
Institutional ownership
CIEN in reported 13F portfolios
Reported long holdings only · filing data can be delayed up to 45 days after quarter-end.Managers14
Reported value$2.7B
Latest periodJun 2026
Frequently asked questions
Who owns CIEN?
14 managers currently show reported long CIEN positions in Insider Deck’s 13F sample, totaling about $2.7B.
How fresh is CIEN ownership data?
13F filings are quarterly and can lag quarter-end by up to 45 days. Positions appear after SEC tables are processed and CUSIPs resolve to tickers.