Security key
171779309
CIENA CORP - Common Stock, par value $0.01 per share (CIEN)
CUSIP: 171779309
Q2 2025 13F Holders as of 30 Jun 2025
- Security type / class
- Equity / Common Stock, par value $0.01 per share
- Total 13F shares
- 141,010,238
- Total 13F value
- $11,468,438,045
- Share change
- +4,532,432
- Put/Call ratio
- 66%
- SEC-reported price per share
- $81.33
- Number of holders
- 558
- Value change
- +$481,577,370
- Number of buys
- 298
- Number of sells
- 258
- Shares outstanding
- 144,009,692
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q2 2025
Institutions
558
Top holders
10
CIEN full security history
Ownership snapshot
Full 13F holder table
CIENA CORP SEC filings
CIENA CORP company facts
Broader feeds
Ownership snapshot
Top reported holders of CIEN - CIENA CORP - Common Stock, par value $0.01 per share (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BlackRock, Inc.
Disclosed value leader
BlackRock, Inc.
Comparable rows
0/15
Latest evidence
31 Mar 2025
13F
Highest disclosed value: $1,029,684,962
15 rows are not safely comparable across share classes.
Showing 1-6 of 15 holder rows.
Quick read
BlackRock, Inc. has the largest disclosed position value at $1.03B.
0 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BlackRock, Inc.'s linked filing trail.
Disclosed position value
Top 5
BlackRock, Inc.
$1.03B
VANGUARD GROUP INC
$905.56M
JPMORGAN CHASE & CO
$292.22M
STATE STREET CORP
$275.84M
BARROW HANLEY MEWHINNEY & STRAUSS...
$229.39M
Value bars compare disclosed positions; verify each figure against the linked filing evidence.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
Company
|
—
denominator unverified
|
$1,029,684,962
17,039,301 shares
|
— | 31 Mar 2025 |
| VANGUARD GROUP INC |
13F
Company
|
—
denominator unverified
|
$905,558,414
14,985,246 shares
|
— | 31 Mar 2025 |
| JPMORGAN CHASE & CO |
13F
Company
|
—
denominator unverified
|
$292,219,880
4,835,674 shares
|
— | 31 Mar 2025 |
| STATE STREET CORP |
13F
Company
|
—
denominator unverified
|
$275,841,981
4,564,653 shares
|
— | 31 Mar 2025 |
| BARROW HANLEY MEWHINNEY & STRAUSS LLC |
13F
Company
|
—
denominator unverified
|
$229,386,902
3,795,911 shares
|
— | 31 Mar 2025 |
| BNP Paribas Asset Management Holding S.A. |
13F
Company
|
—
denominator unverified
|
$202,664,000
3,353,358 shares
|
— | 31 Mar 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q2 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
558
Shares
141,010,238
Rows available
558
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q2 2025 vs Q1 2025 Across Filers
Q1 2025 holders
542
Q2 2025 holders
558
Holder diff
16
| Investor | Q1 2025 Shares | Q2 2025 Shares | Share Diff | Share Chg % | Q1 2025 value | Q2 2025 value | Value change | Value Chg % |
|---|