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Overview
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Business Summary
Filings
Ownership
Valuation
Ownership — MMED
Institutional Holdings
Insider Transactions
US Institutional Ownership
100.0%
Institution
Shares
Value
Ownership %
Change
Filing Date
MASSACHUSETTS FINANCIAL SERVICES CO /MA/
6.88M
$102.0M
--
--
2026-03-31
Longaeva Partners L.P.
3.18M
$47.0M
83.94%
--
2026-03-31
CITADEL ADVISORS LLC
2.86M
$42.0M
75.60%
--
2026-03-31
MILLENNIUM MANAGEMENT LLC
2.59M
$38.0M
68.49%
--
2026-03-31
Alyeska Investment Group, L.P.
2.00M
$29.0M
52.82%
--
2026-03-31
Sessa Capital IM, L.P.
2.00M
$29.0M
52.82%
--
2026-03-31
Hood River Capital Management LLC
1.51M
$22.0M
39.77%
--
2026-03-31
FMR LLC
1.36M
$20.0M
36.05%
--
2026-03-31
Point72 Asset Management, L.P.
1.14M
$17.0M
30.10%
--
2026-03-31
Rock Springs Capital Management LP
1.05M
$15.0M
27.86%
--
2026-03-31
Balyasny Asset Management L.P.
854.7K
$12.0M
22.57%
--
2026-03-31
Boston Partners
845.0K
$12.0M
22.32%
--
2026-03-31
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND
750.0K
$11.0M
19.81%
--
2026-03-31
D. E. Shaw & Co., Inc.
450.0K
$6.0M
11.88%
--
2026-03-31
Parkman Healthcare Partners LLC
317.3K
$4.0M
8.38%
--
2026-03-31
READYSTATE ASSET MANAGEMENT LP
315.0K
$4.0M
8.32%
--
2026-03-31
UBS Group AG
311.3K
$4.0M
8.22%
--
2026-03-31
Sculptor Capital LP
306.0K
$4.0M
8.08%
--
2026-03-31
GOLDMAN SACHS GROUP INC
305.9K
$4.0M
8.08%
--
2026-03-31
BURKEHILL GLOBAL MANAGEMENT, LP
300.0K
$4.0M
7.92%
--
2026-03-31
JANE STREET GROUP, LLC
299.4K
$4.0M
7.91%
--
2026-03-31
BlueCrest Capital Management Ltd
275.0K
$4.0M
7.26%
--
2026-03-31
Alberta Investment Management Corp
250.0K
$3.0M
6.60%
--
2026-03-31
Ghisallo Capital Management LLC
250.0K
$3.0M
6.60%
--
2026-03-31
GEODE CAPITAL MANAGEMENT, LLC
245.9K
$3.0M
6.49%
--
2026-03-31
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