MED in the 13F filings

Medifast Inc · CUSIP 58470H101

Quarter

Q2 2026 Q1 2026 Q1 2025 Q3 2024 Q2 2024 Q1 2024 Q4 2023 Q3 2023 Q2 2023 Q1 2023 Q4 2022 Q3 2022

Quarter end: 31 Mar 2026; the date the book describes
Filed: 15 May 2026; latest of these filings; the earliest 12 May 2026
Managers listing it: 13; at least, of 95 tracked, among listed positions
Comparable managers: 91; filed both Q4 2025 and Q1 2026; 0 listed it in both
Shares listed: 1,943,281; combined, among listed positions
Reported value: $20m; combined, at the quarter end

AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.

Among the 91 comparable managers: 7 buyers (opened or added shares) and 8 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +170,395.

Managers listing MED in Q1 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

ActionShare of book at least

13 of 13 holders

				Action		Filing
Renaissance Technologies LLC	773,710	$7.9m	under 0.1%	Trimmed	-6,900	14 May 2026 (the filing on sec.gov)
Two Sigma Investments LP	338,158	$3.4m	under 0.1%	Added	+257,818	15 May 2026 (the filing on sec.gov)
Man Group PLC	236,212	$2.4m	under 0.1%	Trimmed	-288	15 May 2026 (the filing on sec.gov)
D. E. Shaw & Co.	160,564	$1.6m	under 0.1%	Trimmed	-58,554	15 May 2026 (the filing on sec.gov)
AQR Capital Management LLC	145,575	$1.5m	under 0.1%	Added	+14,066	15 May 2026 (the filing on sec.gov)
Jane Street Group LLC	126,407	$1.3m	under 0.1%	New	new	12 May 2026 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC	42,552	$434k	under 0.1%	New	new	15 May 2026 (the filing on sec.gov)
Invesco Ltd	32,776	$334k	under 0.1%	Trimmed	-7,662	12 May 2026 (the filing on sec.gov)
PDT Partners LLC	30,723	$313k	under 0.1%	New	new	15 May 2026 (the filing on sec.gov)
AllianceBernstein LP	27,320	$292k	under 0.1%	Held	0	15 May 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc	26,705	$273k	under 0.1%	Added	+3,800	15 May 2026 (the filing on sec.gov)
Fidelity (FMR LLC)	2,578	$26k	under 0.1%	Trimmed	-35,823	15 May 2026 (the filing on sec.gov)
Walleye Capital LLC	1	$0	0.00%	New	new	13 May 2026 (the filing on sec.gov)

Largest increases and reductions, by shares

There is no earlier quarter on file to compare with.

Increases

Two Sigma Investments LPexisting position · 338,158 shares now+257,818
Jane Street Group LLCnew position · 126,407 shares now+126,407
Schonfeld Strategic Advisors LLCnew position · 42,552 shares now+42,552
PDT Partners LLCnew position · 30,723 shares now+30,723
AQR Capital Management LLCexisting position · 145,575 shares now+14,066

Reductions

D. E. Shaw & Co.existing position · 160,564 shares now-58,554
Fidelity (FMR LLC)existing position · 2,578 shares now-35,823
Invesco Ltdexisting position · 32,776 shares now-7,662
Renaissance Technologies LLCexisting position · 773,710 shares now-6,900
Man Group PLCexisting position · 236,212 shares now-288

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (4)

Exited (3)

Acadian Asset Management LLCwas $1.7m
Verition Fund Management LLCwas $265k
Brevan Howard Capital Management LPwas $140k

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.

3 in Q3 2023 to 1 in Q2 2026

Tracked managers listing it, at least.

the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.

MED by quarter
Quarter	Holders	Reported value	Buyers	Sellers
Q3 2013	1	$1.7m	n.a.	n.a.
Q4 2013	1	$4.1m	n.a.	n.a.
Q1 2014	2	$22m	n.a.	n.a.
Q2 2014	2	$32m	n.a.	n.a.
Q3 2014	2	$36m	n.a.	n.a.
Q4 2014	3	$37m	n.a.	n.a.
Q1 2015	2	$31m	n.a.	n.a.
Q2 2015	3	$34m	n.a.	n.a.
Q3 2015	1	$20m	n.a.	n.a.
Q4 2015	4	$49m	n.a.	n.a.
Q1 2016	3	$27m	n.a.	n.a.
Q2 2016	4	$62m	n.a.	n.a.
Q3 2016	4	$74m	n.a.	n.a.
Q4 2016	3	$91m	n.a.	n.a.
Q1 2017	5	$106m	n.a.	n.a.
Q2 2017	4	$98m	n.a.	n.a.
Q3 2017	4	$137m	n.a.	n.a.
Q4 2017	5	$136m	n.a.	n.a.
Q1 2018	8	$185m	n.a.	n.a.
Q2 2018	8	$313m	n.a.	n.a.
Q3 2018	9	$413m	n.a.	n.a.
Q4 2018	9	$236m	n.a.	n.a.
Q1 2019	10	$227m	n.a.	n.a.
Q2 2019	8	$170m	n.a.	n.a.
Q3 2019	11	$226m	n.a.	n.a.
Q4 2019	9	$292m	n.a.	n.a.
Q1 2020	6	$154m	n.a.	n.a.
Q2 2020	7	$330m	n.a.	n.a.
Q3 2020	11	$327m	n.a.	n.a.
Q4 2020	8	$341m	n.a.	n.a.
Q1 2021	9	$264m	n.a.	n.a.
Q2 2021	11	$393m	n.a.	n.a.
Q3 2021	7	$204m	n.a.	n.a.
Q4 2021	6	$199m	n.a.	n.a.
Q1 2022	7	$153m	n.a.	n.a.
Q2 2022	5	$149m	n.a.	n.a.
Q3 2022	4	$79m	n.a.	n.a.
Q4 2022	5	$78m	n.a.	n.a.
Q1 2023	6	$73m	n.a.	n.a.
Q2 2023	5	$67m	n.a.	n.a.
Q3 2023	3	$57m	n.a.	n.a.
Q4 2023	2	$51m	2	0
Q1 2024	2	$32m	2	0
Q2 2024	1	$7.4m	1	0
Q3 2024	1	$5.5m	0	1
Q1 2025	1	$5.2m	1	0
Q1 2026	1	$313k	7	8
Q2 2026	1	$348k	15	5

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

MED and PM →MED and KO →MED and COST →Choose a stock to compare with MED →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own MED, latest filings →Back to the 13F Explorer →

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