Ciena Corp
Held by 13 tracked managers as of Q2 2026 · CUSIP ⓘCUSIP: A 9-character ID for one specific security - one share class of one company, or one bond. Tickers can change and can mean different things in different countries; a CUSIP always identifies exactly the same security, which is why filings use it. Guide 171779309 · Sector ⓘGICS sectors: The 11-sector system most investors know (Global Industry Classification Standard): Technology, Health Care, Financials and so on. This site assigns each company a GICS-style sector from its SIC code, with a few hand corrections, so sector pages match the names investors expect. Guide
In plain English: 13 of the investors we track own this stock. In the latest quarter, 6 of them bought more of it and 8 sold some or all of theirs. That tells you what they did last quarter — not what the stock will do next.
Educational and informational only, not personalized investment advice. Based on public filings that may be delayed or contain errors; verify with the original filings. Disclaimer
Managers holding
13
-3 vs last quarter (like-for-like)
Total value held
$1.47B
Across tracked managers
Average weight ⓘOn average, how big this stock is in the portfolios that own it (its share of each manager's reported portfolio value).
0.2%
Of each manager's book
QoQ value ⓘLike-for-like: only managers that filed both quarters are compared, so a manager filing late (or confidentially) does not look like buying or selling. Includes price changes.
-$289.59M
-31.3% vs last quarter
Net shares bought
-1.1M
Est. net flow -$444.52M
Quarter activity
6 bought · 8 sold
0 new · 3 sold out
Tracked capital in this stock
Total value held (area) and number of managers (line). Dips can mean a large holder filed that quarter confidentially (e.g. Norges Bank in Q1/Q3).
Aggregate buying and selling
Net share change reported each quarter
Who owns CIEN?
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Who owns CIEN? — Q2 2026
Holders ranked by position size, with each one's quarter-over-quarter change.
Column filters
| # | Manager | Fund | Shares | Value ↓ | % of their portfolio | QoQ | Δ shares | Δ shares % | Est. Δ value ⓘChange in shares × this quarter's price |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Norges Bank | Norges Bank Investment Management | 1.70M | $835.50M | 0.1% | — | — | — | — |
| 2 | Ken Griffin | Citadel Advisors | 214.06K | $105.01M | 0.1% | Added | +73.6K | +52.4% | +$36.12M |
| 3 | Steve Cohen | Point72 Asset Management | 210.52K | $103.27M | 0.2% | Reduced | -334.1K | -61.3% | -$163.92M |
| 4 | Jim Simons | Renaissance Technologies | 184.77K | $90.64M | 0.1% | Added | +87.0K | +88.9% | +$42.67M |
| 5 | Israel Englander | Millennium Management | 166.42K | $81.64M | 0.1% | Added | +75.7K | +83.5% | +$37.14M |
| 6 | Barrow Hanley | Barrow Hanley Mewhinney & Strauss | 137.84K | $67.62M | 0.2% | Reduced | -163.7K | -54.3% | -$80.31M |
| 7 | David Shaw | D.E. Shaw & Co. | 133.19K | $65.34M | 0.0% | Added | +124.3K | +1394.6% | +$60.97M |
| 8 | Richard Mashaal | Senvest Management | 130.43K | $63.98M | 1.9% | Reduced | -42.5K | -24.6% | -$20.85M |
| 9 | Ray Dalio | Bridgewater Associates | 101.04K | $49.57M | 0.2% | Reduced | -42.8K | -29.8% | -$21.00M |
| 10 | Two Sigma | Two Sigma Investments | 9.50K | $4.66M | 0.0% | Added | +6.0K | +172.5% | +$2.95M |
| 11 | Bridgeway | Bridgeway Capital Management | 6.47K | $3.17M | 0.1% | Held | 0 | 0.0% | $0 |
| 12 | Matthew McLennan | First Eagle Investment Management | 2.00K | $981.12K | 0.0% | Reduced | -600 | -23.1% | -$294.34K |
| 13 | Ken Fisher | Fisher Asset Management | 679 | $333.27K | 0.0% | Added | +69 | +11.3% | +$33.87K |
Column filters
| Manager | Fund | Shares sold | Value last quarter ↓ |
|---|---|---|---|
| Stephen Mandel | Lone Pine Capital | -809.5K | $314.28M |
| Diamond Hill | Diamond Hill Capital Management | -58.5K | $22.73M |
| Select Equity Group | Select Equity Group | -2.6K | $1.01M |
Politician trades
Column filters
| Politician | Date | Ticker | Asset | Type | Reported range ⓘThe dollar range the politician reported. Exact amounts are not disclosed. | Est. size ⓘOur estimate only: the midpoint of the reported range. | Owner | Account ⓘSubholding Of: the account the trade was in, as named on the report (e.g. an IRA or a brokerage account). The same stock bought on the same day in different accounts is a separate trade in each account. | Filed ↓ | Filing delay ⓘDays between the trade and the report. Over 45 days is late under the STOCK Act. | Source |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Gil Cisneros Politician | Oct 21, 2026 | CIEN | Ciena Corporation (CIEN) [ST] | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | — | Nov 10, 2026 | 20 days | PTR ↗ |
| Ro Khanna Politician | Sep 11, 2026 | CIEN | CIENA CORPORATION CMN scanned | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Child | — | Oct 7, 2026 | 26 days | PTR ↗ |
| Ro Khanna Politician | Aug 3, 2026 | CIEN | CIENA CORPORATION CMN scanned | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | — | — | Sep 4, 2026 | 32 days | PTR ↗ |
| Ro Khanna Politician | Jun 30, 2026 | CIEN | CIENA CORPORATION CMN scanned | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Spouse | — | Jul 6, 2026 | 6 days | PTR ↗ |
| Gil Cisneros Politician | May 14, 2026 | CIEN | Ciena Corporation (CIEN) [ST] | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | — | Jun 8, 2026 | 25 days | PTR ↗ |
| Gil Cisneros Politician | May 29, 2026 | CIEN | Ciena Corporation (CIEN) [ST] | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | — | Jun 8, 2026 | 10 days | PTR ↗ |
| Lisa McClain Politician | Oct 15, 2025 | CIEN | Ciena Corporation (CIEN) [ST] | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Spouse | — | Nov 21, 2025 | 37 days | PTR ↗ |
| Lisa McClain Politician | Oct 30, 2025 | CIEN | Ciena Corporation (CIEN) [ST] | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Spouse | — | Nov 21, 2025 | 22 days | PTR ↗ |
| Lisa McClain Politician | Oct 30, 2025 | CIEN | Ciena Corporation (CIEN) [ST] | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Spouse | — | Nov 21, 2025 | 22 days | PTR ↗ |
| Lisa McClain Politician | Oct 31, 2025 | CIEN | Ciena Corporation (CIEN) [ST] | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Spouse | — | Nov 21, 2025 | 21 days | PTR ↗ |
| Lisa McClain Politician | Jun 17, 2025 | CIEN | Ciena Corporation (CIEN) [ST] | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Spouse | — | Aug 13, 2025 | 57 days Late | PTR ↗ |
| John James Politician | Sep 4, 2024 | CIEN | Ciena Corporation (CIEN) [ST] | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | — | Sep 6, 2024 | 2 days | PTR ↗ |
| John James Politician | Nov 10, 2023 | CIEN | Ciena Corporation (CIEN) [ST] | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | — | Sep 2, 2024 | 297 days Late | PTR ↗ |