Latest Period
Q4 2025
Security Snapshot
CIENA CORP - Common Stock (CIEN) Institutional Ownership
CUSIP: 171779309
13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026
Institutions Reporting
840
Shares (Excl. Options)
137,285,181
Price
$233.87
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- Type / Class
- Equity / Common Stock
- Symbol
- CIEN on NYSE
- Shares outstanding
- 141,483,681
- Price per share
- $479.90
- All holders as of 31 Dec 2025
- Q4 2025
- Total 13F shares
- 137,285,181
- Total reported value
- $32,127,341,416
- % of total 13F portfolios
- 0.03%
- Share change
- -1,611,257
- Value change
- +$27,022,675
- Number of holders
- 840
- Price from insider filings
- $479.90
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors
Quick Takeaways
- CIEN - CIENA CORP - Common Stock is tracked under CUSIP 171779309.
- 840 institutions reported positions in Q4 2025.
- 4 significant owners is listed from Schedule 13D/13G reporting.
What Changed
- Holder count moved from 840 to 374 between Q4 2025 and Q1 2026.
- Reported value moved from $32,127,341,416 to $2,170,682,282.
Why This Matters
- 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.
Source Evidence
Source: SEC Form 13F
Open SEC Evidence
Latest holder context comes from 840 institutions filings for Q4 2025.
Investment Quick Answers
What is CUSIP 171779309?
CUSIP 171779309 identifies CIEN - CIENA CORP - Common Stock in SEC 13F datasets.
Where can I see the latest institutional holders?
Review the Q4 2025 holders report and the ownership history table below.
Next ownership checks
Use the next link that matches the question you still need to answer about this security.
- Latest 13F filings when you want to inspect fresh institutional portfolio moves.
- Latest Schedule 13D/13G reports when you need large-owner changes outside the 13F cycle.
- All institutional ownership pages to compare this security with other holder-history pages.
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 171779309:
Significant Owners of CIENA CORP - Common Stock (CIEN) based on Schedule 13D/G filings
| 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 Dec 2025, 840 institutional investors reported holding 137,285,181 shares of CIENA CORP - Common Stock (CIEN). This represents 97% of the company’s total 141,483,681 outstanding shares.
Top 25 Institutional Shareholders
The largest institutional shareholders of CIENA CORP - Common Stock (CIEN) together control 71% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| FMR LLC | 15% | 21,128,210 | -0.14% | 0.25% | $4,941,254,307 |
| BlackRock, Inc. | 12% | 16,668,830 | +6.9% | 0.07% | $3,898,339,156 |
| VANGUARD GROUP INC | 10% | 14,376,579 | -4.6% | 0.05% | $3,362,250,530 |
| JPMORGAN CHASE & CO | 7.7% | 10,864,292 | +68% | 0.17% | $2,540,832,224 |
| STATE STREET CORP | 3.6% | 5,102,409 | +17% | 0.04% | $1,193,300,393 |
| PRICE T ROWE ASSOCIATES INC /MD/ | 2.9% | 4,051,625 | +53% | 0.1% | $947,554,000 |
| GEODE CAPITAL MANAGEMENT, LLC | 1.9% | 2,687,437 | +5.7% | 0.04% | $627,567,346 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 1.6% | 2,236,835 | +96% | 0.31% | $523,128,601 |
| BANK OF AMERICA CORP /DE/ | 1.5% | 2,164,447 | -31% | 0.04% | $506,199,208 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 1.4% | 1,973,150 | -21% | 0.53% | $461,478,000 |
| Capital World Investors | 1.3% | 1,868,881 | +1.7% | 0.06% | $437,075,199 |
| Jericho Capital Asset Management L.P. | 1.2% | 1,656,172 | -16% | 4.4% | $387,328,946 |
| Invesco Ltd. | 1.1% | 1,518,841 | +23% | 0.05% | $355,211,346 |
| Atreides Management, LP | 1% | 1,428,230 | +2% | 7.1% | $334,020,150 |
| AQR CAPITAL MANAGEMENT LLC | 1% | 1,412,560 | -6% | 0.17% | $330,355,301 |
| DIMENSIONAL FUND ADVISORS LP | 0.99% | 1,396,874 | -30% | 0.07% | $326,720,052 |
| MORGAN STANLEY | 0.98% | 1,384,972 | -20% | 0.02% | $323,903,769 |
| Polar Capital Holdings Plc | 0.91% | 1,289,427 | -12% | 1.4% | $301,558,292 |
| NORTHERN TRUST CORP | 0.86% | 1,216,923 | +2.9% | 0.04% | $284,601,781 |
| Bank of New York Mellon Corp | 0.79% | 1,118,142 | +5.4% | 0.05% | $261,499,909 |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | 0.78% | 1,098,593 | -55% | 0.72% | $256,927,945 |
| VOYA INVESTMENT MANAGEMENT LLC | 0.67% | 946,820 | +1267% | 0.22% | $221,432,793 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.66% | 935,728 | -0.64% | 0.03% | $218,838,707 |
| Nuveen, LLC | 0.63% | 898,343 | -3.5% | 0.06% | $210,095,478 |
| Whale Rock Capital Management LLC | 0.63% | 893,483 | -33% | 2.7% | $208,958,869 |
Institutional Holders of CIENA CORP - Common Stock (CIEN) across Reporting Periods
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 5,542,526 | $2,170,682,282 | -$227,622,090 | $388.23 | 374 |
| 2025 Q4 | 137,285,181 | $32,127,341,416 | +$27,022,675 | $233.87 | 840 |
| 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 |
| 2020 Q1 | 137,025,251 | $5,466,684,248 | -$205,605,946 | $39.81 | 407 |
| 2019 Q4 | 142,510,400 | $6,080,361,404 | +$21,201,439 | $42.69 | 404 |
| 2019 Q3 | 142,682,103 | $5,591,140,949 | +$149,085,938 | $39.23 | 403 |
| 2019 Q2 | 138,428,456 | $5,690,198,088 | -$185,046,026 | $41.13 | 404 |
| 2019 Q1 | 145,690,633 | $5,430,421,262 | +$27,842,735 | $37.34 | 408 |
| 2018 Q4 | 145,194,901 | $4,919,874,247 | -$298,271,245 | $33.91 | 358 |
| 2018 Q3 | 153,864,710 | $4,805,974,344 | +$85,787,217 | $31.24 | 336 |
| 2018 Q2 | 151,385,005 | $4,011,063,102 | +$68,555,358 | $26.51 | 294 |
| 2018 Q1 | 149,043,718 | $3,859,435,666 | -$8,041,511 | $25.90 | 296 |
| 2017 Q4 | 150,178,949 | $3,143,475,684 | -$121,805,010 | $20.93 | 282 |
| 2017 Q3 | 153,364,478 | $3,369,469,810 | +$107,225,635 | $21.97 | 278 |
| 2017 Q2 | 147,471,057 | $3,690,983,516 | +$22,698,351 | $25.02 | 309 |
| 2017 Q1 | 147,288,137 | $3,477,634,778 | +$469,538,225 | $23.61 | 285 |
| 2016 Q4 | 142,453,541 | $3,476,632,626 | +$129,800,445 | $24.41 | 292 |
| 2016 Q3 | 137,081,009 | $2,987,147,807 | +$134,429,675 | $21.80 | 269 |
| 2016 Q2 | 130,207,962 | $2,441,990,256 | -$109,417,708 | $18.75 | 276 |
| 2016 Q1 | 138,574,763 | $2,634,656,754 | -$74,689,389 | $19.02 | 260 |
| 2015 Q4 | 141,713,927 | $2,931,455,967 | +$151,612,371 | $20.69 | 282 |
| 2015 Q3 | 134,533,506 | $2,787,084,237 | +$264,900,161 | $20.72 | 287 |
| 2015 Q2 | 121,574,549 | $2,878,353,382 | +$149,867,111 | $23.68 | 277 |
| 2015 Q1 | 116,194,951 | $2,244,609,128 | +$157,257,484 | $19.31 | 243 |
| 2014 Q4 | 108,195,948 | $2,099,739,633 | +$34,778,897 | $19.41 | 220 |
| 2014 Q3 | 108,501,484 | $1,811,541,702 | -$59,659,854 | $16.72 | 226 |
| 2014 Q2 | 111,081,011 | $2,404,270,993 | +$81,068,235 | $21.66 | 235 |
| 2014 Q1 | 106,880,122 | $2,427,790,103 | +$50,602,886 | $22.74 | 260 |