Company · Ownership research

MEDIFAST INC MED

CIK 0000910329 · CUSIP 58470H101

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 58470H101 (MED), not CUSIP 58470H901 (MED), CUSIP 58470H951 (MED), and does not merge CUSIPs.

This page lists the top 20 of 124 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	BlackRock, Inc. CIK 2012383 · View history	$12.55M 918,148 shares	0.00%	+18.96K(+2.10%)Added	SEC filing ↗ Nov 12, 2025	▾
02	RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history	$10.95M 800,910 shares	0.01%	-12.40K(-1.50%)Reduced	SEC filing ↗ Nov 13, 2025	▾
03	VANGUARD GROUP INC CIK 102909 · View history	$9.72M 711,309 shares	0.00%	-104.74K(-12.80%)Reduced	SEC filing ↗ Nov 7, 2025	▾
04	CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · View history	$8.14M 595,211 shares	0.00%	+174.04K(+41.30%)Added	SEC filing ↗ Nov 10, 2025	▾
05	MORGAN STANLEY CIK 895421 · Amended · View history	$8.05M 588,539 shares	0.00%	+130.75K(+28.60%)Added	SEC filing ↗ May 27, 2026	▾
06	BANK OF AMERICA CORP /DE/ CIK 70858 · Amended · View history	$6.19M 452,543 shares	0.00%	+56.17K(+14.20%)Added	SEC filing ↗ Feb 3, 2026	▾
07	ACADIAN ASSET MANAGEMENT LLC CIK 916542 · View history	$5.43M 397,442 shares	0.01%	-13.66K(-3.30%)Reduced	SEC filing ↗ Nov 13, 2025	▾
08	Lido Advisors, LLC CIK 1650150 · View history	$4.52M 330,703 shares	0.02%	+330.70KNew	SEC filing ↗ Nov 14, 2025	▾
09	AQR CAPITAL MANAGEMENT LLC CIK 1167557 · View history	$4.25M 310,819 shares	0.00%	+90.69K(+41.20%)Added	SEC filing ↗ Nov 14, 2025	▾
10	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$4.08M 298,369 shares	0.00%	+48.97K(+19.60%)Added	SEC filing ↗ Nov 12, 2025	▾
11	D. E. Shaw & Co., Inc. CIK 1009207 · View history	$3.60M 263,648 shares	0.00%	-57.58K(-17.90%)Reduced	SEC filing ↗ Nov 14, 2025	▾
12	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$3.50M 256,047 shares	0.00%	+2.44K(+1.00%)Added	SEC filing ↗ Nov 12, 2025	▾
13	TWO SIGMA INVESTMENTS, LP CIK 1179392 · View history	$3.13M 228,799 shares	0.00%	+22.68K(+11.00%)Added	SEC filing ↗ Nov 14, 2025	▾
14	STATE STREET CORP CIK 93751 · View history	$3.09M 226,026 shares	0.00%	+301(+0.10%)Added	SEC filing ↗ Nov 14, 2025	▾
15	AMERICAN CENTURY COMPANIES INC CIK 748054 · View history	$3.02M 221,245 shares	0.00%	+7.27K(+3.40%)Added	SEC filing ↗ Nov 12, 2025	▾
16	TWO SIGMA ADVISERS, LP CIK 1478735 · View history	$3.00M 219,100 shares	0.01%	+6.20K(+2.90%)Added	SEC filing ↗ Nov 14, 2025	▾
17	Man Group plc CIK 1637460 · View history	$2.92M 213,430 shares	0.01%	+15.27K(+7.70%)Added	SEC filing ↗ Nov 14, 2025	▾
18	GOLDMAN SACHS GROUP INC CIK 886982 · View history	$2.89M 211,418 shares	0.00%	+54.70K(+34.90%)Added	SEC filing ↗ Nov 14, 2025	▾
19	Quinn Opportunity Partners LLC CIK 1633275 · View history	$1.74M 127,112 shares	0.13%	0(0.00%)Unchanged	SEC filing ↗ Nov 13, 2025	▾
20	BRIDGEWAY CAPITAL MANAGEMENT, LLC CIK 1107261 · View history	$1.62M 118,477 shares	0.03%	+60.53K(+104.50%)Added	SEC filing ↗ Nov 14, 2025	▾

Showing 20 / 124 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

124

Cancelled or null records excluded

Disclosed shares

9,233,252

Not deduplicated across managers

Disclosed value

$126.20M

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

MEDIFAST INC · Q3 2025

Explore all 124 reporting institutions.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.