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# Who owns CIENA CORP (CIEN)? Elite investor 13F holders

8 tracked elite investors reported holding CIENA CORP as of 2026-06-30, including Atreides Management, Renaissance Technologies LLC, D.E. Shaw, Bridgewater Associates, Gotham Asset Management. Who bought, trimmed or exited each quarter, with links to the original SEC 13F filings.

8 tracked investors currently reported holding · Latest report period: 2026-06-30 · Information Technology · Technology Hardware & Equipment

Ciena Corporation, a network technology company, provides hardware, software, and services for various network operators in the Americas, Europe, the Middle East, Africa, the Asia Pacific, Japan, and India. It operates through Networking Platforms, Platform Software and Services, Blue Planet Automation Software and Services, and Global Services segments. The Networking Platforms segment consists…

## Reported holders and securities, including exits (up to 20)

| Investor | Security | Instrument | Report period | Filed | Value | Quantity | Units | Change | Source |
|  --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| [Atreides Management](https://ownershiptrace.com/13f/investors/5) | CIENA CORP | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 337760862.00 USD | 688521.000000 | Shares | add | [Original filing](https://www.sec.gov/Archives/edgar/data/1777813/0001777813-26-000009-index.html) |
| [Lone Pine Capital](https://ownershiptrace.com/13f/investors/71) | CIENA CORP | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 0.00 USD | 0.000000 | Shares | exited | [Original filing](https://www.sec.gov/Archives/edgar/data/1061165/0000919574-26-005485-index.html) |
| [Renaissance Technologies LLC](https://ownershiptrace.com/13f/investors/63) | CIENA CORP | SHARE | 2026-06-30 | 2026-08-13 00:00:00 | 90642733.00 USD | 184774.000000 | Shares | add | [Original filing](https://www.sec.gov/Archives/edgar/data/1037389/0001037389-26-000059-index.html) |
| [D.E. Shaw](https://ownershiptrace.com/13f/investors/98) | CIENA CORP | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 65340139.00 USD | 133195.000000 | Shares | add | [Original filing](https://www.sec.gov/Archives/edgar/data/1009207/0001104659-26-097217-index.html) |
| [Bridgewater Associates](https://ownershiptrace.com/13f/investors/8) | CIENA CORP | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 49565201.00 USD | 101038.000000 | Shares | reduce | [Original filing](https://www.sec.gov/Archives/edgar/data/1350694/0001350694-26-000003-index.html) |
| [Gotham Asset Management](https://ownershiptrace.com/13f/investors/94672) | CIENA CORP | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 55442601.00 USD | 113019.000000 | Shares | reduce | [Original filing](https://www.sec.gov/Archives/edgar/data/1510387/0001398344-26-014644-index.html) |
| [Mairs & Power Funds](https://ownershiptrace.com/13f/investors/54) | CIENA CORP | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 1373568.00 USD | 2800.000000 | Shares | hold | [Original filing](https://www.sec.gov/Archives/edgar/data/1070134/0001172661-26-003496-index.html) |
| [First Eagle Investment Management](https://ownershiptrace.com/13f/investors/32) | CIENA CORP | SHARE | 2026-06-30 | 2026-08-24 00:00:00 | 981120.00 USD | 2000.000000 | Shares | reduce | [Original filing](https://www.sec.gov/Archives/edgar/data/1325447/0001325447-26-000033-index.html) |
| [Tudor Investment](https://ownershiptrace.com/13f/investors/94675) | CIENA CORP | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 0.00 USD | 0.000000 | Shares | exited | [Original filing](https://www.sec.gov/Archives/edgar/data/923093/0000902664-26-003485-index.html) |
| [Ancora Advisors / Ancora Holdings](https://ownershiptrace.com/13f/investors/101) | CIENA CORP | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 8830.00 USD | 18.000000 | Shares | reduce | [Original filing](https://www.sec.gov/Archives/edgar/data/1446114/0001446114-26-000012-index.html) |

Public disclosures can be delayed, incomplete, or amended. Report period describes a position date; transaction date describes a reported transaction; filed describes submission. A recent filing or page update does not establish a current holding. A dash means unavailable or not comparable, not zero.

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