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Overview
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Business Summary
Filings
Ownership
Valuation
Ownership — CIEN
Institutional Holdings
Insider Transactions
US Institutional Ownership
96.0%
Institution
Shares
Value
Ownership %
Change
Filing Date
FMR LLC
19.11M
$9.38B
13.47%
-2.10M
2026-06-30
BlackRock, Inc.
12.72M
$6.24B
8.96%
-655.3K
2026-06-30
JPMORGAN CHASE & CO
11.21M
$5.37B
7.90%
+341.9K
2026-06-30
VANGUARD CAPITAL MANAGEMENT LLC
9.23M
$4.53B
6.51%
+64.4K
2026-06-30
VANGUARD PORTFOLIO MANAGEMENT LLC
7.68M
$3.77B
5.41%
+311.5K
2026-06-30
STATE STREET CORP
6.68M
$3.28B
4.71%
+371.5K
2026-06-30
PRICE T ROWE ASSOCIATES INC /MD/
4.07M
$2.00B
2.87%
-1.17M
2026-06-30
GEODE CAPITAL MANAGEMENT, LLC
3.37M
$1.65B
2.38%
-695.1K
2026-06-30
JANE STREET GROUP, LLC
2.15M
$1.05B
1.52%
+1.14M
2026-06-30
AMERICAN CENTURY COMPANIES INC
1.85M
$908.0M
1.31%
+1.32M
2026-06-30
BANK OF AMERICA CORP /DE/
1.79M
$877.0M
1.26%
-166.1K
2026-06-30
Capital World Investors
1.76M
$861.0M
1.24%
+30.8K
2026-06-30
Invesco Ltd.
1.73M
$848.0M
1.22%
+199.9K
2026-06-30
NORGES BANK
1.70M
$835.0M
1.20%
+891.2K
2026-06-30
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
1.68M
$822.0M
1.18%
+288.6K
2026-06-30
MORGAN STANLEY
1.63M
$801.0M
1.15%
+73.1K
2026-06-30
Nuveen, LLC
1.39M
$682.0M
0.98%
+547.2K
2026-06-30
CITADEL ADVISORS LLC
1.33M
$651.0M
0.94%
+491.4K
2026-06-30
Sixth Street Partners Management Company, L.P.
1.25M
$612.0M
0.88%
--
2026-06-30
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
1.25M
$612.0M
0.88%
-23.3K
2026-06-30
NORTHERN TRUST CORP
1.22M
$597.0M
0.86%
+30.6K
2026-06-30
DIMENSIONAL FUND ADVISORS LP
1.15M
$565.0M
0.81%
+7.2K
2026-06-30
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC
1.15M
$561.0M
0.81%
+293.5K
2026-06-30
BNP PARIBAS ASSET MANAGEMENT Holding S.A.
1.11M
$542.0M
0.78%
+83.8K
2026-06-30
AQR CAPITAL MANAGEMENT LLC
1.05M
$507.0M
0.74%
+75.1K
2026-06-30
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