Latest Period
Q1 2026
Security Snapshot
CIENA CORP - Common Stock (CIEN) Institutional Ownership
CUSIP: 171779309
13F Institutional Holders and Ownership History from Q1 2014 to Q2 2026
Institutions Reporting
1,077
Shares (Excl. Options)
134,280,623
Price
$388.23
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- Security type / class
- Equity / Common Stock
- Symbol
- CIEN on NYSE
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 134,280,623
- Total 13F value
- $51,811,693,776
- Portfolio coverage rank
- 0.03%
- Share change
- -7,035,721
- Value change
- -$2,372,703,793
- Number of holders
- 1,077
- Shares outstanding
- 141,483,681
- SEC-reported price per share
- $490.56
- Insider filing price
- $490.56
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- CIEN - CIENA CORP - Common Stock is tracked under CUSIP 171779309.
- 1077 institutions reported positions in Q1 2026.
- 4 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 1,077 to 114 between Q1 2026 and Q2 2026.
- SEC-reported value moved from $51,811,693,776 to $573,587,992.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 1077 institutions filings for Q1 2026.
Security key
171779309
Latest holder period
Q1 2026
13F holders
1,077
13D/G owners
4
CIK / CUSIP context first
Open Q1 2026 holders
CIEN full holder history
CIENA CORP SEC filings
CIENA CORP company facts
CIENA CORP insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 171779309:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
4
Security
CIEN
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. | 8% | -23% | $4,377,114,664 | -$1,266,939,688 | 11,274,540 | -22% | BlackRock, Inc. | 31 Mar 2026 |
| JPMORGAN CHASE & CO | 7.7% | $2,537,894,563 | 10,851,732 | JPMORGAN CHASE & CO. | 31 Dec 2025 | |||
| VANGUARD CAPITAL MANAGEMENT LLC | 7.5% | $4,103,137,259 | 10,568,831 | Vanguard Capital Management | 31 Mar 2026 | |||
| VANGUARD PORTFOLIO MANAGEMENT LLC | 5.2% | $2,868,361,262 | 7,388,304 | Vanguard Portfolio Management | 31 Mar 2026 |
As of 31 Mar 2026, 1,077 institutional investors reported holding 134,280,623 shares of CIENA CORP - Common Stock (CIEN). This represents 95% of the company’s total 141,483,681 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
71%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| FMR LLC | 15% | 21,209,756 | +0.39% | 0.43% | $8,234,263,456 |
| BlackRock, Inc. | 9.5% | 13,373,787 | -20% | 0.09% | $5,192,105,090 |
| JPMORGAN CHASE & CO | 7.2% | 10,226,649 | -5.9% | 0.25% | $3,732,727,250 |
| VANGUARD CAPITAL MANAGEMENT LLC | 6.5% | 9,169,355 | 0% | 0.09% | $3,559,818,692 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 5.2% | 7,369,124 | 0% | 0.15% | $2,860,915,011 |
| STATE STREET CORP | 4.5% | 6,309,050 | +24% | 0.08% | $2,449,362,482 |
| PRICE T ROWE ASSOCIATES INC /MD/ | 3.7% | 5,242,802 | +29% | 0.24% | $2,035,414,000 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.9% | 4,065,559 | +51% | 0.1% | $1,576,154,861 |
| Capital Research Global Investors | 1.9% | 2,750,050 | 0.17% | $1,067,534,801 | |
| BANK OF AMERICA CORP /DE/ | 1.4% | 1,954,632 | -9.7% | 0.06% | $758,846,761 |
| Capital World Investors | 1.2% | 1,724,807 | -7.7% | 0.09% | $669,621,822 |
| Jericho Capital Asset Management L.P. | 1.2% | 1,656,172 | 0% | 9.5% | $642,975,655 |
| MORGAN STANLEY | 1.1% | 1,561,554 | +13% | 0.04% | $606,243,238 |
| Invesco Ltd. | 1.1% | 1,530,293 | +0.75% | 0.08% | $594,105,652 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 0.98% | 1,388,477 | -38% | 0.29% | $539,048,426 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.9% | 1,272,258 | +36% | 0.08% | $493,928,723 |
| VOYA INVESTMENT MANAGEMENT LLC | 0.85% | 1,205,099 | +27% | 0.49% | $467,855,585 |
| NORTHERN TRUST CORP | 0.84% | 1,187,291 | -2.4% | 0.06% | $460,941,986 |
| DIMENSIONAL FUND ADVISORS LP | 0.81% | 1,146,020 | -18% | 0.09% | $444,746,223 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 0.72% | 1,021,586 | -48% | 0.46% | $396,571,980 |
| AQR CAPITAL MANAGEMENT LLC | 0.69% | 977,094 | -31% | 0.17% | $374,519,988 |
| Bank of New York Mellon Corp | 0.66% | 926,858 | -17% | 0.07% | $359,833,945 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.6% | 851,932 | +22% | 0.07% | $330,745,560 |
| Nuveen, LLC | 0.6% | 844,193 | -6% | 0.09% | $327,741,049 |
| LONE PINE CAPITAL LLC | 0.57% | 809,522 | 2.5% | $314,280,726 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
50
Latest
Q1 2026
Rows shown
1-25 of 50
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q2 | 1,206,876 | $573,587,992 | +$8,196,880 | $490.56 | 114 |
| 2026 Q1 | 134,280,623 | $51,811,693,776 | -$2,372,703,793 | $388.23 | 1,077 |
| 2025 Q4 | 137,351,368 | $32,142,820,569 | +$39,454,516 | $233.87 | 851 |
| 2025 Q3 | 139,134,046 | $20,273,323,122 | -$142,449,066 | $145.67 | 684 |
| 2025 Q2 | 141,010,238 | $11,468,438,045 | +$481,577,370 | $81.33 | 558 |
| 2025 Q1 | 136,482,829 | $8,250,645,953 | -$352,226,003 | $60.43 | 542 |
| 2024 Q4 | 140,639,777 | $11,927,949,714 | -$30,379,194 | $84.81 | 533 |
| 2024 Q3 | 142,165,351 | $8,759,802,337 | +$137,878,037 | $61.59 | 461 |
| 2024 Q2 | 140,001,910 | $6,745,177,951 | +$143,699,694 | $48.18 | 449 |
| 2024 Q1 | 137,161,500 | $6,776,208,736 | +$192,160,909 | $49.45 | 464 |
| 2023 Q4 | 134,005,592 | $6,036,621,954 | -$79,214,547 | $45.01 | 448 |
| 2023 Q3 | 134,977,056 | $6,366,989,947 | -$105,230,138 | $47.26 | 466 |
| 2023 Q2 | 137,179,871 | $5,828,746,458 | -$80,634,569 | $42.49 | 465 |
| 2023 Q1 | 138,682,996 | $7,279,718,619 | -$41,936,127 | $52.52 | 480 |
| 2022 Q4 | 139,408,197 | $7,107,065,096 | -$180,505,509 | $50.98 | 448 |
| 2022 Q3 | 144,336,104 | $5,838,400,545 | +$344,794,490 | $40.43 | 410 |
| 2022 Q2 | 135,142,356 | $6,176,263,763 | +$21,390,413 | $45.70 | 440 |
| 2022 Q1 | 134,228,774 | $8,134,405,743 | -$175,237,375 | $60.63 | 480 |
| 2021 Q4 | 135,807,566 | $10,450,586,776 | -$70,604,523 | $76.97 | 508 |
| 2021 Q3 | 136,655,447 | $7,017,619,377 | -$328,461,486 | $51.35 | 439 |
| 2021 Q2 | 142,196,886 | $8,088,830,406 | -$63,184,128 | $56.89 | 455 |
| 2021 Q1 | 143,076,551 | $7,828,233,443 | +$18,390,334 | $54.72 | 446 |
| 2020 Q4 | 143,689,781 | $7,587,963,140 | +$410,394,154 | $52.85 | 447 |
| 2020 Q3 | 137,169,579 | $5,445,472,887 | -$76,893,140 | $39.69 | 457 |
| 2020 Q2 | 137,023,504 | $7,420,001,250 | +$30,338,737 | $54.16 | 477 |