CIEN
CIENA (CIEN)
NYSE
$393.47+$14.33 (+3.78%)
Price as of Oct 02, 2026 3:23 PM EDT
  • $53.8B
    Market Cap
  • 148.36%
    1-Year Change
  • Communication Equipment
    Industry

Top Holders

Institutional
Mutual Funds
Holder
Ownership %
Shares Held
Change (Shares, %)
Report Date
FMR LLC
13.50%
19.1M
-2.1M (-10.97%)
Jun 30, 2026
BLACKROCK FUNDING, INC. /DE
12.08%
17.1M
+950,030 (+5.56%)
Dec 31, 2024
BLACKROCK INC.
11.03%
15.6M
+230,877 (+1.48%)
Jun 30, 2024
VANGUARD GROUP INC
10.16%
14.4M
-692,023 (-4.81%)
Dec 31, 2025
BLACKROCK, INC.
8.98%
12.7M
-655,293 (-5.15%)
Jun 30, 2026
JPMORGAN CHASE & CO
7.92%
11.2M
+979,560 (+8.74%)
Jun 30, 2026
VANGUARD CAPITAL MANAGEMENT LLC
6.52%
9.2M
+64,448 (+0.70%)
Jun 30, 2026

Current Ownership Distribution

  • Institutions2.7B (73.71%)
  • Mutual Funds940.4M (26.14%)
  • Insiders5.6M (0.15%)
  • Other0 (0.00%)

Insider Transactions

  • 0.15% (5.6M)
    Current InsiderOwnership (%, shares)
  • 0
    Number of InsiderBuying (last 12 months)
  • $0.00
    Amount of InsiderBuying (last 12 months)
  • 11
    Number of InsiderSelling (last 12 months)
  • $2.7B
    Amount of InsiderSelling (last 12 months)
Insider Name & Title
Type
Date
Transaction Value
Shares
Share Price
Shares After Transactions
Cumello Joseph
EVP & General Mgr.
Sell
Sep 25, 2026
$568,604.95
1,586
$358.52
39,570
NEVENS THOMAS MICHAEL
Gift
Sep 24, 2026
$0.00
2,797
$0.00
3,492
Claflin Bruce L.
Sell
Sep 24, 2026
$1.0M
2,857
$355.91
8,279
NEVENS THOMAS MICHAEL
Sell
Sep 23, 2026
$1.3M
3,738
$359.04
6,289
DiPerna Dino
EVP & Chief R&D Officer
In Kind
Sep 20, 2026
$71,155.20
204
$348.80
38,922
SMITH GARY B
President & CEO
In Kind
Sep 20, 2026
$1.0M
2,985
$348.80
237,141
Cumello Joseph
EVP & General Mgr.
In Kind
Sep 20, 2026
$153,820.80
441
$348.80
42,431
Hoffman Grant
EVP & Chief Supply
In Kind
Sep 20, 2026
$59,296.00
170
$348.80
6,347
DiPerna Dino
EVP & Chief R&D Officer
In Kind
Sep 20, 2026
$154,867.20
444
$348.80
38,478
SMITH GARY B
President & CEO
In Kind
Sep 20, 2026
$1.1M
3,102
$348.80
234,039
Gage Brodie
EVP & Chief Product &
In Kind
Sep 20, 2026
$71,155.20
204
$348.80
37,003
SMITH GARY B
President & CEO
In Kind
Sep 20, 2026
$607,958.40
1,743
$348.80
232,296
DiPerna Dino
EVP & Chief R&D Officer
In Kind
Sep 20, 2026
$254,624.00
730
$348.80
37,748
SMITH GARY B
President & CEO
In Kind
Sep 20, 2026
$326,825.60
937
$348.80
231,359
Cumello Joseph
EVP & General Mgr.
In Kind
Sep 20, 2026
$63,481.60
182
$348.80
42,249
DiPerna Dino
EVP & Chief R&D Officer
In Kind
Sep 20, 2026
$149,286.40
428
$348.80
37,320
Kosaraju Sheela
EVP & Chief Legal Officer
In Kind
Sep 20, 2026
$54,412.80
156
$348.80
87,925
DiPerna Dino
EVP & Chief R&D Officer
In Kind
Sep 20, 2026
$86,153.60
247
$348.80
37,073
Cumello Joseph
EVP & General Mgr.
In Kind
Sep 20, 2026
$203,001.60
582
$348.80
41,667
Gage Brodie
EVP & Chief Product &
In Kind
Sep 20, 2026
$154,169.60
442
$348.80
36,561
Cumello Joseph
EVP & General Mgr.
In Kind
Sep 20, 2026
$62,784.00
180
$348.80
41,487
Kosaraju Sheela
EVP & Chief Legal Officer
In Kind
Sep 20, 2026
$241,020.80
691
$348.80
87,234
Cumello Joseph
EVP & General Mgr.
In Kind
Sep 20, 2026
$115,452.80
331
$348.80
41,156
Gage Brodie
EVP & Chief Product &
In Kind
Sep 20, 2026
$233,347.20
669
$348.80
35,892
Kosaraju Sheela
EVP & Chief Legal Officer
In Kind
Sep 20, 2026
$191,491.20
549
$348.80
86,685
Gage Brodie
EVP & Chief Product &
In Kind
Sep 20, 2026
$135,334.40
388
$348.80
35,504
Kosaraju Sheela
EVP & Chief Legal Officer
In Kind
Sep 20, 2026
$115,104.00
330
$348.80
86,355
Gage Brodie
EVP & Chief Product &
In Kind
Sep 20, 2026
$80,572.80
231
$348.80
35,273
Kosaraju Sheela
EVP & Chief Legal Officer
In Kind
Sep 20, 2026
$65,923.20
189
$348.80
86,166
SMITH GARY B
President & CEO
Sell
Sep 15, 2026
$974,688.11
2,952
$330.18
240,126