Ciena Corporation
Ciena Corporation (CIEN) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · CIEN · as of Sep 30, 2025
Ownership Breakdown
724
Institutional Holders
▲ 129 vs Q2
$20.28B
Total Inst. Value
▲ $8.80B vs Q2
141.55M
Shares Outstanding
freeFloat 99.53%
139.16M
13F Shares Held
▼ 1.85M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
CIEN largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
FMR LLC telephone & telegraph apparatus | 21.16M | 14.92% | 14.92% | $3.08T | Nov 13, 2025 | ▼ 74.2K |
BLACKROCK, INC. telephone & telegraph apparatus | 15.60M | 11.00% | 11.00% | $2.27T | Nov 12, 2025 | ▼ 1.47M |
VANGUARD GROUP INC telephone & telegraph apparatus | 15.07M | 10.62% | 10.62% | $2.20T | Nov 7, 2025 | ▼ 19.8K |
JPMORGAN CHASE & CO telephone & telegraph apparatus | 6.46M | 4.56% | 4.56% | $941.45B | Nov 26, 2025 | ▲ 1.22M |
STATE STREET CORP telephone & telegraph apparatus | 4.35M | 3.07% | 3.07% | $634.00B | Nov 14, 2025 | ▼ 102.7K |
BANK OF AMERICA CORP /DE/ telephone & telegraph apparatus | 3.13M | 2.21% | 2.21% | $456.15B | Feb 3, 2026 | ▼ 364.4K |
PRICE T ROWE ASSOCIATES INC /MD/ telephone & telegraph apparatus | 2.65M | 1.87% | 1.87% | $385.66B | Nov 14, 2025 | ▲ 2.39M |
GEODE CAPITAL MANAGEMENT, LLC telephone & telegraph apparatus | 2.54M | 1.79% | 1.79% | $370.29B | Nov 12, 2025 | ▲ 38.7K |
BNP PARIBAS ASSET MANAGEMENT HOLDING S.A. telephone & telegraph apparatus | 2.51M | 1.77% | 1.77% | $365.07B | Nov 7, 2025 | ▼ 557.4K |
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC telephone & telegraph apparatus | 2.44M | 1.72% | 1.72% | $355.56B | Nov 12, 2025 | ▼ 267.7K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
19
Increased
+9.75M shares3
New Positions
first time holders28
Decreased
−11.18M shares0
Sold Out
fully exitedNet shares change (top 50)
1.43M
+9.75M / −11.18M
Net new holders
-6
3 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
CIEN insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
0
Buy transactions
27
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
SMITH GARY B President, CEO | Jun 1, 2026 | Sale | 2,952 | $565.92 | $1.67M | 269.6K | Form 4 ↗ |
SMITH GARY B President, CEO | May 15, 2026 | Sale | 2,952 | $562.05 | $1.66M | 272.5K | Form 4 ↗ |
Rothenstein David M SVP and Chief Strategy Officer | May 15, 2026 | Sale | 2,500 | $562.39 | $1.41M | 190.1K | Form 4 ↗ |
Gage Brodie SVP Global Products & Supply | May 15, 2026 | Sale | 1,200 | $570.65 | $684.8K | 43.9K | Form 4 ↗ |
SMITH GARY B President, CEO | May 1, 2026 | Sale | 2,952 | $537.74 | $1.59M | 275.5K | Form 4 ↗ |
SMITH GARY B President, CEO | Apr 15, 2026 | Sale | 2,952 | $467.47 | $1.38M | 278.4K | Form 4 ↗ |
Rothenstein David M SVP and Chief Strategy Officer | Apr 15, 2026 | Sale | 2,500 | $467.65 | $1.17M | 192.6K | Form 4 ↗ |
Gage Brodie SVP Global Products & Supply | Apr 15, 2026 | Sale | 1,200 | $471.79 | $566.1K | 45.1K | Form 4 ↗ |
DiPerna Dino SVP Global R&D | Apr 15, 2026 | Sale | 1,322 | $471.79 | $623.7K | 44.0K | Form 4 ↗ |
DiPerna Dino SVP Global R&D | Apr 15, 2026 | Sale | 1,507 | $471.79 | $711.0K | 42.5K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Ciena Corporation (CIEN) is primarily owned by institutional investors, who hold approximately 98.3% of total shares outstanding. Company insiders own approximately 0.47%, while retail and public investors account for the remaining 1.22%.
The largest institutional shareholder of Ciena Corporation is FMR LLC, holding approximately 21.16 million shares — equal to 14.92% of outstanding shares — as of September 30, 2025.
A total of 724 institutional investors currently hold CIEN stock, with a combined institutional value of approximately $20.28 billion as of the most recent 13F filing period.
Frequently asked questions
CIEN ownershipCiena Corporation (CIEN) is primarily owned by institutional investors, who hold approximately 98.3% of shares. The largest shareholder is FMR LLC with a 14.92% stake. Company insiders hold 0.47%. Data sourced from SEC Form 13F as of September 30, 2025.