DOSSIER · 13F Holders · Q2 2026
MED

MEDIFAST INC

117 institutions still hold MEDIFAST INC as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 58470H101·117 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$75M
visible holders
Holders
117
filers reporting
Concentration
10.97%
RENAISSANCE TECHNOLOGIES LLC #1
top holder share
AI Holders Summary · Q2 2026

117 institutions reported MED in Q2 2026. RENAISSANCE TECHNOLOGIES LLC leads at 11.0% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
$8M779K0.01%Q2 2026
02
Steamboat Capital Partners, LLC
CIK 0001635663
$7M707K1.60%Q2 2026
03
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 0001446194· Market maker
$6M583K0.00%Q2 2026
04
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
$5M481K0.00%Q2 2026
05
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$5M447K0.00%Q2 2026
06
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
CIK 0000884546· Index
$4M397K0.00%Q2 2026
07
BlackRock, Inc.
CIK 0002012383
$4M370K0.00%Q2 2026
08
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$4M363K0.00%Q2 2026
09
CITADEL ADVISORS LLC
CIK 0001423053
$4M355K0.00%Q2 2026
10
AMERICAN CENTURY COMPANIES INC
CIK 0000748054
$3M319K0.00%Q2 2026
11
MORGAN STANLEY
CIK 0000895421
$3M293K0.00%Q2 2026
12
JANE STREET GROUP, LLC
CIK 0001595888· Market maker
$3M266K0.00%Q1 2026
13
GOLDMAN SACHS GROUP INC
CIK 0000886982
$3M243K0.00%Q2 2026
14
MARSHALL WACE, LLP
CIK 0001318757
$3M242K0.00%Q2 2026
15
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
$3M236K0.00%Q2 2026
16
Peapod Lane Capital LLC
CIK 0002050979
$2M223K1.59%Q2 2026
17
D. E. Shaw & Co., Inc.
CIK 0001009207
$2M219K0.00%Q4 2025
18
Lido Advisors, LLC
CIK 0001650150
$2M220K0.01%Q2 2026
19
Trexquant Investment LP
CIK 0001633445
$2M213K0.01%Q2 2026
20
COMMONS CAPITAL, LLC
CIK 0001912835
$2M150K1.11%Q2 2026
Page 1 of 6
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Insiders at MEDIFAST INC
Kiai ParsaXian MingSchlackman ScottGeary Elizabeth A.Thomas Andrea BRose Jeffrey MatthewChard Daniel RMaloney James P.