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MGNI · META in the 13F filings

Two to four stocks side by side among the 95 tracked managers: who lists them, how that has moved, who bought and sold in a quarter, and which managers hold more than one.

MGNIMETA
Quarter
Q2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023

Holders over time

Tracked managers listing each stock every quarter, at least, or their combined reported value. A gap is a quarter in which no tracked manager listed it. Click a quarter to compare there.
  • MGNI
  • META
020406080202120222023202420252026
Holders and value by quarter
QuarterMGNIMETA
Q3 2020none listed holders, n.a.65 holders, $131bn
Q4 20201 holders, $5.7m68 holders, $137bn
Q1 20212 holders, $94m71 holders, $147bn
Q2 20215 holders, $88m64 holders, $173bn
Q3 20213 holders, $43m64 holders, $164bn
Q4 20214 holders, $38m57 holders, $150bn
Q1 20221 holders, $1.2m53 holders, $93.4bn
Q2 20222 holders, $1.9m58 holders, $65.9bn
Q3 20223 holders, $5.4m57 holders, $53.0bn
Q4 20221 holders, $4.2m58 holders, $56.5bn
Q1 20232 holders, $3.1m57 holders, $80.0bn
Q2 20232 holders, $6.6m64 holders, $112bn
Q3 20231 holders, $1.7m67 holders, $120bn
Q4 2023none listed holders, n.a.67 holders, $143bn
Q1 2024none listed holders, n.a.70 holders, $193bn
Q2 20241 holders, $21m65 holders, $195bn
Q3 20241 holders, $50m66 holders, $218bn
Q4 20242 holders, $129m65 holders, $224bn
Q1 20253 holders, $163m67 holders, $214bn
Q2 20256 holders, $520m62 holders, $270bn
Q3 20252 holders, $165m67 holders, $256bn
Q4 20254 holders, $367m58 holders, $224bn
Q1 20263 holders, $84m64 holders, $201bn
Q2 20265 holders, $104m61 holders, $188bn
MGNI

Magnite Inc

Holders
5
Reported value
$104m
Buyers
13
Sellers
16

Breadth -3 among 91 comparable managers.

Software and IT servicesInternet, programming and data services
META

Meta Platforms Inc

Holders
61
Reported value
$188bn
Buyers
32
Sellers
37

Breadth -5 among 91 comparable managers.

Software and IT servicesConsumer and digital platforms · L3VLUPInternet, programming and data services

Who holds both, Q2 2026

Among the 62 tracked managers listing any of them. "Only" is about listed positions: a manager may hold the other below its listed range.

Only MGNI (1)

Schonfeld Strategic Advisors LLC

Only META (57)

Acadian Asset Management LLC, AllianceBernstein LP, Altimeter Capital Management LP, Appaloosa LP, AQR Capital Management LLC, ARK Investment Management LLC, Artisan Partners LP, Baillie Gifford & Co, Balyasny Asset Management LLC, Brevan Howard Capital Management LP, Bridgewater Associates LP, Capital World Investors, Citadel Advisors LLC, Coatue Management LLC, D. E. Shaw & Co., D1 Capital Partners LP, Davidson Kempner Capital Management LP, Dodge & Cox, Fidelity (FMR LLC), GAMCO Investors Inc, Glenview Capital Management LLC, Harris Associates LP, Hudson Bay Capital Management LP, Invesco Ltd, Jane Street Group LLC, and 32 more

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. Buyers and sellers count comparable managers (those that filed both quarters) by shares, so a rise in value with no rise in shares is the price. Large books are listed to their largest positions. These are 95 tracked managers, not the institutional market.

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