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Overview
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Business Summary
Filings
Ownership
Valuation
Ownership — KOS
Institutional Holdings
Insider Transactions
US Institutional Ownership
79.2%
Institution
Shares
Value
Ownership %
Change
Filing Date
BlackRock, Inc.
56.02M
$118.0M
10.18%
+8.56M
2026-06-30
STATE STREET CORP
29.45M
$62.0M
5.35%
+1.21M
2026-06-30
TWO SIGMA INVESTMENTS, LP
25.40M
$53.0M
4.62%
--
2026-06-30
D. E. Shaw & Co., Inc.
24.54M
$51.0M
4.46%
+4.15M
2026-06-30
Equinox Partners Investment Management LLC
20.68M
$43.0M
3.76%
--
2026-06-30
HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC
18.84M
$39.0M
3.43%
-1.21M
2026-06-30
GEODE CAPITAL MANAGEMENT, LLC
17.07M
$36.0M
3.10%
+4.35M
2026-06-30
Sixth Street Partners Management Company, L.P.
13.77M
$29.0M
2.50%
--
2026-06-30
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
13.77M
$29.0M
2.50%
-365.8K
2026-06-30
VANGUARD PORTFOLIO MANAGEMENT LLC
12.00M
$25.0M
2.18%
+3.38M
2026-06-30
Grantham, Mayo, Van Otterloo & Co. LLC
11.85M
$25.0M
2.15%
-6.46M
2026-06-30
Invesco Ltd.
10.95M
$23.0M
1.99%
-201.2K
2026-06-30
DIMENSIONAL FUND ADVISORS LP
9.58M
$20.0M
1.74%
+2.50M
2026-06-30
GOLDMAN SACHS GROUP INC
8.53M
$18.0M
1.55%
-729.7K
2026-06-30
AMERICAN CENTURY COMPANIES INC
8.04M
$16.0M
1.46%
+7.94M
2026-06-30
MILLENNIUM MANAGEMENT LLC
7.43M
$15.0M
1.35%
-5.20M
2026-06-30
M&G PLC
7.41M
$14.0M
1.35%
+377.8K
2026-06-30
MORGAN STANLEY
7.36M
$15.0M
1.34%
+1.52M
2026-06-30
Nuveen, LLC
7.33M
$15.0M
1.33%
+4.02M
2026-06-30
RENAISSANCE TECHNOLOGIES LLC
7.01M
$14.0M
1.27%
+1.67M
2026-06-30
VANGUARD CAPITAL MANAGEMENT LLC
6.81M
$14.0M
1.24%
+390.4K
2026-06-30
UBS Group AG
6.08M
$12.0M
1.11%
+1.27M
2026-06-30
NORTHERN TRUST CORP
5.31M
$11.0M
0.97%
+1.08M
2026-06-30
Bridgewater Associates, LP
4.72M
$9.0M
0.86%
--
2026-06-30
Boston Partners
4.10M
$8.0M
0.74%
-659.1K
2026-06-30
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