CIEN CIENA CORP: institutional ownership and insider trading
1,251 funds reported holding $77.2B of CIENA CORP in their latest 13F filings; in Q2 2026 funds net bought $338M, with 251 new positions and 107 funds selling out; over the last 12 months insiders bought $0 and sold $101M on the open market.
Famous investors holding CIEN
- Ray Dalio (Bridgewater Associates): $49.6M, 0.2% of the portfolio
- Renaissance Technologies (Renaissance Technologies): $90.6M, 0.1% of the portfolio
- Ken Griffin (Citadel Advisors): $652M, 0.1% of the portfolio
- Izzy Englander (Millennium Management): $114M, 0.0% of the portfolio
- D. E. Shaw (D. E. Shaw & Co.): $87.3M, 0.0% of the portfolio
- Two Sigma (Two Sigma Investments): $11.8M, 0.0% of the portfolio
Largest institutional holders of CIEN
- FMR LLC — $9.38B
- BlackRock, Inc. (BLK) — $6.24B
- Banque Cantonale Vaudoise — $5.68B
- JPMORGAN CHASE & CO (JPM, AMJB, VYLD, JPM-PC, JPM-PD, JPM-PJ, JPM-PK, JPM-PL, JPM-PM) — $5.37B
- VANGUARD CAPITAL MANAGEMENT LLC — $4.53B
- VANGUARD PORTFOLIO MANAGEMENT LLC — $3.77B
- VANGUARD GROUP INC — $3.36B
- STATE STREET CORP (STT, STT-PG) — $3.28B
- PRICE T ROWE ASSOCIATES INC /MD/ — $2.00B
- GEODE CAPITAL MANAGEMENT, LLC — $1.65B
Recent CIEN insider trades
- Oct 15, 2026: Smith Gary B sold 2,952 shares ($1.03M)
- Oct 15, 2026: Rothenstein David M sold 2,500 shares ($870K)
- Oct 15, 2026: DiPerna Dino sold 890 shares ($309K)
- Oct 15, 2026: Gage Brodie sold 1,200 shares ($413K)
Members of Congress trading CIEN
- May 29, 2026: Gilbert Ray Cisneros, Jr. bought $1.00K–$15.0K
- May 14, 2026: Gilbert Ray Cisneros, Jr. bought $1.00K–$15.0K
- Oct 31, 2025: Lisa C. McClain sold $1.00K–$15.0K
- Oct 30, 2025: Lisa C. McClain sold $1.00K–$15.0K
- Oct 30, 2025: Lisa C. McClain bought $1.00K–$15.0K
- Oct 15, 2025: Lisa C. McClain sold $1.00K–$15.0K
- Jun 17, 2025: Lisa C. McClain bought $1.00K–$15.0K
- Sep 4, 2024: John James sold $1.00K–$15.0K
- Nov 10, 2023: John James bought $1.00K–$15.0K
5%+ owners
- FMR LLC: 13.5% (Schedule 13G/A, filed Aug 6, 2026)
- BlackRock, Inc.: 8.0% (Schedule 13G/A, filed Apr 24, 2026)
- Vanguard Capital Management: 7.5% (Schedule 13G, filed Apr 29, 2026)
- Vanguard Portfolio Management: 5.2% (Schedule 13G, filed Apr 29, 2026)