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Of the 20 tracked institutions holding CIEN, 14 have a 3-year clone track record — 13 of them beat the S&P. Average holder's clone alpha: +7.7pt. It's a gauge of who owns the name, not just how many.
Among the 20 tracked institutional investors we monitor, CIEN (CIENA CORP) is held with a combined value of $23.99B across 67,510,197 shares. The largest holder is FMR LLC with a position worth $8.23B (0.43% of their portfolio). 4 funds opened new positions in the most recent quarter. 6 funds increased their holdings. 10 funds reduced their position.
Total Institutional Value
$23.99B
Total Shares Held
67,510,197
Institutional Holders
20
% of Shares Outstanding
47.7%
of 141.55M shares · SEC 2026-05-29
Days to Cover
2.4+3.6%
3.99M shares short · FINRA 2026-07-15
Tracked 13F institutions hold 47.7% of CIEN's shares outstanding. This is a floor: 13F filings arrive on a ~45-day lag and we track only a subset of institutional filers, so true institutional ownership is higher. Shares-outstanding is the latest SEC cover-page figure (as of 2026-05-29), not a live float.
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
0
$0
14
$12.13M
Total Transactions
14
Last 12 months
| Date | Insider | Code | Type | Shares | Value |
|---|---|---|---|---|---|
| Jul 15, 2026 | David M Rothenstein | S | Sale | 2,500 | $1.05M |
| Jul 15, 2026 | GARY B SMITH | S | Sale | 2,952 | $1.24M |
| Jul 15, 2026 | Dino DiPerna | S | Sale | 391 | $175.62K |
| Jul 15, 2026 | Brodie Gage | S | Sale | 1,200 | $538.98K |
| Jul 1, 2026 | Jason Phipps | S | Sale | 2,629 | $1.23M |
| Jul 1, 2026 | Sheela Kosaraju | S | Sale | 2,013 | $938.46K |
| Jul 1, 2026 | GARY B SMITH | S | Sale | 2,952 | $1.38M |
| Jul 1, 2026 | Marc D. Graff | S | Sale | 126 | $58.74K |
| Jun 26, 2026 | Joseph Cumello | S | Sale | 1,586 | $739.60K |
| Jun 24, 2026 | Marc D. Graff | S | Sale | 126 | $56.62K |
Showing 10 of 14 transactions
| # | Fund | Value↓ | Portfolio % | Change |
|---|---|---|---|---|
| 1 | FMR LLC | $8.23B | 0.43% | +0.4% |
| 2 | BlackRock, Inc. | $5.19B | 0.09% | -19.8% |
| 3 | VANGUARD GROUP INC | $3.36B | 0.05% | -4.6% |
| 4 | STATE STREET CORP | $2.45B | 0.08% | +23.6% |
| 5 | PRICE T ROWE ASSOCIATES INC /MD/ | $2.04B | 0.24% | +29.4% |
| 6 | Capital Research Global Investors | $1.07B | 0.17% | New |
| 7 | AQR CAPITAL MANAGEMENT LLC | $374.52M | 0.17% | -30.8% |
| 8 | LONE PINE CAPITAL LLC | $314.28M | 2.51% | New |
| 9 | Atreides Management, LP | $262.76M | 6.40% | -52.6% |
| 10 | Point72 Asset Management, L.P. | $211.45M | 0.37% | +15.7% |
| Member | Type | Date |
|---|---|---|
| Gilbert Cisneros | Buy | May 29, 2026 |
| Gilbert Cisneros | Buy | May 14, 2026 |
| Alan Armstrong | Buy | Mar 30, 2026 |
| Alan Armstrong | Buy |
As of the latest SEC 13F filings, FMR LLC is the largest institutional holder of CIEN with a position worth $8.23B, representing 0.43% of their portfolio. In total, 20 institutional investors hold CIEN with a combined value of $23.99B.
In the most recent quarter, 4 funds opened a new position in CIEN. Additionally, 6 increased their holdings and 10 reduced their positions.
Institutional investors hold $23.99B worth of CIEN stock across 20 positions. The largest institutional holder is FMR LLC with $8.23B in holdings.
A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For CIEN, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
Get notified when hedge funds change their CIEN positions.
Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →
| Mar 27, 2026 |
| Lisa McClain | Sell | Oct 31, 2025 |
| Lisa McClain | Buy | Oct 30, 2025 |
| Lisa McClain | Sell | Oct 30, 2025 |
| Lisa McClain | Sell | Oct 15, 2025 |
Showing 8 of 11. STOCK Act disclosures lag up to 45 days.
Last Close
$390.96
2026-07-24
YTD
+58.9%
57% of 52-week range
