Comparable stake leader
BlackRock, Inc.
SEC ownership of CIENA CORP
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000936395.
Disclosed value leader
FMR LLC
Comparable rows
50/50
Latest evidence
01 Jun 2026
- Public ticker
- CIEN on NYSE
- Parsed ownership sources
- 13F, 13D/G, and 3/4/5
- Largest SEC-reported holder
- BlackRock, Inc.
- Latest 13D/G holder
- BlackRock, Inc.
- Latest parsed ownership date
- 01 Jun 2026
- Issuer CIK
- 0000936395
- Issuer location
- Hanover, MD
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
2 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of CIENA CORP (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
FMR LLC
Comparable rows
50/50
Latest evidence
01 Jun 2026
13F
13D/G
3/4/5
Lead comparable stake: 8%
13D/G row: BlackRock, Inc.
Showing 1-8 of 50 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 8%.
50 of 50 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.
Comparable ownership
Top 5
BlackRock, Inc.
8%
JPMORGAN CHASE & CO
7.7%
VANGUARD CAPITAL MANAGEMENT LLC
7.5%
VANGUARD PORTFOLIO MANAGEMENT LLC
5.2%
James E. Moylan Jr.
0.27%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
13D/G
Company
|
8%
from 13D/G
|
$5,192,105,090
13,373,787 shares
|
— | 31 Mar 2026 |
| JPMORGAN CHASE & CO |
13F
13D/G
Company
|
7.7%
from 13D/G
|
$3,732,727,250
10,226,649 shares
|
— | 31 Mar 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13D/G
13F
Vanguard Capital Management · Company
|
7.5%
|
$4,103,137,259
10,568,831 shares
|
$0 | 31 Mar 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13D/G
13F
Vanguard Portfolio Management · Company
|
5.2%
|
$2,868,361,262
7,388,304 shares
|
$0 | 31 Mar 2026 |
| James E. Moylan Jr. |
3/4/5
SVP Finance, CFO
|
0.27%
|
$28,960,457
377,165 shares
|
— | 20 Jun 2025 |
| Gary B. Smith |
3/4/5
President, CEO, Director
|
0.19%
|
$152,547,778
269,557 shares
|
-$43,392,818 | 01 Jun 2026 |
| David M. Rothenstein |
3/4/5
SVP and Chief Strategy Officer
|
0.13%
|
$106,899,178
190,081 shares
|
-$7,140,604 | 15 May 2026 |
| Lawton W. Fitt |
3/4/5
Director
|
0.09%
|
$30,410,817
130,033 shares
|
— | 26 Mar 2026 |
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.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$83,510,798.
Buys
$0
Insiders: 0
Sells
$83,510,798
Insiders: 10
Net
-$83,510,798
Shares: -354,742
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 354,742
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 61,240 | $0 | $27,162,831 | -$27,162,831 |
| 3-6 | 0 | 170,919 | $0 | $40,552,436 | -$40,552,436 |
| 6-9 | 0 | 66,382 | $0 | $11,075,117 | -$11,075,117 |
| 9-12 | 0 | 56,201 | $0 | $4,720,414 | -$4,720,414 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 24 reporting-owner rows connected to CIENA CORP. Open a relationship link for the CIK-to-CIK filing trail.
Rows
24
Largest Forms 3/4/5 holder
Gary B. Smith
Net 12M change
-$83,510,799
Latest report
01 Jun 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Gary B. Smith | President, CEO, Director | $152,547,778 | -$43,392,818 | -22% | Filing P/S | 01 Jun 2026 |
| David M. Rothenstein | SVP and Chief Strategy Officer | $106,899,178 | -$7,140,604 | -6.3% | Filing P/S | 15 May 2026 |
| Sheela Kosaraju | SVP and General Counsel | $37,000,302 | -$1,714,837 | -4.4% | Filing P/S | 01 Apr 2026 |
| Lawton W. Fitt | Director | $30,410,817 | Mixed | 26 Mar 2026 | ||
| Marc D. Graff | SVP & Chief Financial Officer | $29,796,441 | Mixed | 20 Mar 2026 | ||
| James E. Moylan Jr. | SVP Finance, CFO | $28,960,457 | Mixed | 20 Jun 2025 | ||
| Jason Phipps | SVP Global Sales and Marketing | $28,100,777 | -$14,793,601 | -34% | Filing P/S | 01 Apr 2026 |
| Brodie Gage | SVP Global Products & Supply | $25,074,931 | -$3,610,183 | -13% | Filing P/S | 15 May 2026 |
| Dino Diperna | SVP Global R&D | $20,032,203 | -$3,237,623 | -14% | Filing P/S | 15 Apr 2026 |
| Joseph Cumello | SVP, General Mgr. Blue Planet | $18,230,813 | -$3,871,350 | -18% | Filing P/S | 27 Mar 2026 |
| Bruce L. Claflin | Director | $14,495,028 | -$1,185,555 | -7.6% | Mixed | 26 Mar 2026 |
| Patrick Gallagher | Director | $11,878,023 | -$2,642,486 | -18% | Mixed | 26 Mar 2026 |
| Patrick H. Nettles | Executive Chairman, Director | $10,866,242 | Mixed | 21 Mar 2025 | ||
| Joanne Beth Olsen | Director | $8,186,151 | Mixed | 26 Mar 2026 | ||
| Devinder Kumar | Director | $6,912,495 | Mixed | 26 Mar 2026 | ||
| Hassan M. Ahmed | Director | $5,618,726 | Mixed | 26 Mar 2026 | ||
| Scott Mcfeely | SVP, Networking Platforms | $4,300,483 | Mixed | 16 Oct 2023 | ||
| Rick Hamilton | SVP, Software and Services | $3,902,865 | Mixed | 21 Dec 2022 | ||
| Stephen B. Alexander | SVP, Chief Technology Officer | $3,567,691 | Mixed | 20 Dec 2022 | ||
| Judith M. Obrien | Director | $3,455,444 | Mixed | 05 Apr 2022 |
Recent insider transactions for CIENA CORP
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Gary B. Smith | CIEN | Common Stock | Sale | -1.08% | $1,670,597 | $565.92 | -2,952 | 269,557 | 01 Jun 2026 | Direct |
| Gary B. Smith | CIEN | Common Stock | Sale | -1.07% | $1,659,175 | $562.05 | -2,952 | 272,509 | 15 May 2026 | Direct |
| David M. Rothenstein | CIEN | Common Stock | Sale | -1.3% | $1,405,969 | $562.39 | -2,500 | 190,081 | 15 May 2026 | Direct |
| Brodie Gage | CIEN | Common Stock | Sale | -2.66% | $684,780 | $570.65 | -1,200 | 43,941 | 15 May 2026 | Direct |
| Gary B. Smith | CIEN | Common Stock | Sale | -1.06% | $1,587,415 | $537.74 | -2,952 | 275,461 | 01 May 2026 | Direct |
| Gary B. Smith | CIEN | Common Stock | Sale | -1.05% | $1,379,976 | $467.47 | -2,952 | 278,413 | 15 Apr 2026 | Direct |
| David M. Rothenstein | CIEN | Common Stock | Sale | -1.28% | $1,169,134 | $467.65 | -2,500 | 192,581 | 15 Apr 2026 | Direct |
| Brodie Gage | CIEN | Common Stock | Sale | -2.59% | $566,148 | $471.79 | -1,200 | 45,141 | 15 Apr 2026 | Direct |
| Dino Diperna | CIEN | Common Stock | Sale | -6.25% | $1,334,694 | $471.79 | -2,829 | 42,460 | 15 Apr 2026 | Direct |
| Jason Phipps | CIEN | Common Stock | Sale | -99.7% | $9,021,272 | $409.80 | -22,014 | 68 | 01 Apr 2026 | Direct |
| Sheela Kosaraju | CIEN | Common Stock | Sale | -2.14% | $808,241 | $401.71 | -2,012 | 92,107 | 01 Apr 2026 | Direct |
| Gary B. Smith | CIEN | Common Stock | Sale | -1.04% | $1,226,590 | $415.51 | -2,952 | 281,365 | 01 Apr 2026 | Direct |
| Joseph Cumello | CIEN | Common Stock | Sale | -3.7% | $700,016 | $394.82 | -1,773 | 46,175 | 27 Mar 2026 | Direct |
| Lawton W. Fitt | CIEN | Common Stock | Award | 0.67% | 862 | 130,033 | 26 Mar 2026 | Direct | ||
| Mary G. Puma | CIEN | Common Stock | Award | 5.56% | 605 | 11,477 | 26 Mar 2026 | Direct | ||
| Joanne Beth Olsen | CIEN | Common Stock | Award | 1.76% | 605 | 35,003 | 26 Mar 2026 | Direct | ||
| T. Michael Nevens | CIEN | Common Stock | Award | 6.42% | 605 | 10,027 | 26 Mar 2026 | Direct | ||
| Devinder Kumar | CIEN | Common Stock | Award | 2.09% | 605 | 29,557 | 26 Mar 2026 | Direct | ||
| Patrick Gallagher | CIEN | Common Stock | Award | 1.21% | 605 | 50,789 | 26 Mar 2026 | Direct | ||
| Hassan M. Ahmed | CIEN | Common Stock | Award | 2.58% | 605 | 24,025 | 26 Mar 2026 | Direct | ||
| Bruce L. Claflin | CIEN | Common Stock | Award | 1.2% | 605 | 50,843 | 26 Mar 2026 | Direct | ||
| Hassan M. Ahmed | CIEN | Common Stock | Award | 2.58% | 605 | 24,025 | 26 Mar 2026 | Direct | ||
| Brodie Gage | CIEN | Common Stock | Sale | -9.74% | $2,025,000 | $405.00 | -5,000 | 46,341 | 24 Mar 2026 | Direct |
| Gary B. Smith | CIEN | Common Stock | Tax liability | -2.99% | -8,767 | 284,317 | 20 Mar 2026 | Direct | ||
| David M. Rothenstein | CIEN | Common Stock | Tax liability | -1.07% | -2,113 | 195,081 | 20 Mar 2026 | Direct | ||
| Jason Phipps | CIEN | Common Stock | Tax liability | -2.59% | -2,374 | 89,391 | 20 Mar 2026 | Direct | ||
| Sheela Kosaraju | CIEN | Common Stock | Tax liability | -2.09% | -2,012 | 94,119 | 20 Mar 2026 | Direct | ||
| Marc D. Graff | CIEN | Common Stock | Tax liability | -0.16% | -199 | 127,406 | 20 Mar 2026 | Direct | ||
| Brodie Gage | CIEN | Common Stock | Tax liability | -3.63% | -1,932 | 51,341 | 20 Mar 2026 | Direct | ||
| Dino Diperna | CIEN | Common Stock | Tax liability | -4.33% | -2,052 | 45,289 | 20 Mar 2026 | Direct | ||
| Joseph Cumello | CIEN | Common Stock | Tax liability | -3.09% | -1,527 | 47,948 | 20 Mar 2026 | Direct | ||
| Gary B. Smith | CIEN | Common Stock | Sale | -1% | $1,061,325 | $359.53 | -2,952 | 293,084 | 16 Mar 2026 | Direct |
| David M. Rothenstein | CIEN | Common Stock | Sale | -1.25% | $862,500 | $345.00 | -2,500 | 197,194 | 16 Mar 2026 | Direct |
| Gary B. Smith | CIEN | Common Stock | Sale | -0.99% | $1,046,893 | $354.64 | -2,952 | 296,036 | 02 Mar 2026 | Direct |
| David M. Rothenstein | CIEN | Common Stock | Sale | -1.24% | $750,498 | $300.20 | -2,500 | 199,694 | 17 Feb 2026 | Direct |
| Gary B. Smith | CIEN | Common Stock | Sale | -0.98% | $884,157 | $299.51 | -2,952 | 298,988 | 17 Feb 2026 | Direct |
| Gary B. Smith | CIEN | Common Stock | Sale | -0.97% | $784,057 | $265.60 | -2,952 | 301,940 | 02 Feb 2026 | Direct |
| Sheela Kosaraju | CIEN | Common Stock | Sale | -0.4% | $94,060 | $246.23 | -382 | 96,131 | 15 Jan 2026 | Direct |
| Gary B. Smith | CIEN | Common Stock | Sale | -0.97% | $741,209 | $247.65 | -2,993 | 304,892 | 15 Jan 2026 | Direct |
| Jason Phipps | CIEN | Common Stock | Sale | -18.9% | $5,300,621 | $247.89 | -21,383 | 91,765 | 15 Jan 2026 | Direct |
| Dino Diperna | CIEN | Common Stock | Sale | -9.65% | $1,244,446 | $246.23 | -5,054 | 47,341 | 15 Jan 2026 | Direct |
| Patrick Gallagher | CIEN | Common Stock | Sale | -18.8% | $2,642,486 | $227.45 | -11,618 | 50,184 | 12 Jan 2026 | Direct |
| Joseph Cumello | CIEN | Common Stock | Sale | -19.4% | $2,741,531 | $229.82 | -11,929 | 49,475 | 12 Jan 2026 | Direct |
| David M. Rothenstein | CIEN | Common Stock | Sale | -1.22% | $548,200 | $219.28 | -2,500 | 202,194 | 09 Jan 2026 | Direct |
| Gary B. Smith | CIEN | Common Stock | Sale | -21.3% | $19,170,163 | $229.44 | -83,552 | 307,885 | 05 Jan 2026 | Direct |
| Sheela Kosaraju | CIEN | Common Stock | Sale | -1.78% | $421,268 | $241.00 | -1,748 | 96,513 | 02 Jan 2026 | Direct |
| Gary B. Smith | CIEN | Common Stock | Sale | -1.71% | $1,587,543 | $233.46 | -6,800 | 391,437 | 22 Dec 2025 | Direct |
| Gary B. Smith | CIEN | Common Stock | Tax liability | -19.9% | -99,185 | 398,237 | 20 Dec 2025 | Direct | ||
| David M. Rothenstein | CIEN | Common Stock | Tax liability | -7.55% | -16,718 | 204,694 | 20 Dec 2025 | Direct | ||
| Jason Phipps | CIEN | Common Stock | Tax liability | -13.9% | -18,310 | 113,148 | 20 Dec 2025 | Direct |
* marks a reported price that did not pass the local price check.