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Magnetar Financial LLC

Location
EVANSTON, IL
Portfolio Value
Mid $9,419,289,114
Diversification
Highly concentrated
Filing Date
Global Rank
#440 / 8,621 ▲ 54 · as of Mar 2026
Top Industry
Software - Infrastructure 57.7%
3Y Alpha vs SPY
-10.5%
Period ended 4 months ago
Filed May 18, 2026 · 2mo
25 quarters · since Mar 2020

Clone Performance

Jul 2023–Jul 2026 · vs SPY

Hypothetical growth of buying every stock this filer reported holding, rebalancing on each filing and indexed to the same start. Option positions cannot be bought this way and are left out.

Cloned portfolio
+21.3%
SPY
+67.5%
Annualised alpha
-12.1%
Max drawdown
−57.8%

Estimate. 13F holdings are quarter-lagged, so the clone rebalances about 45 days after each period end — when the filing becomes public — and it excludes option and short positions. It tracks 100% of reported value on average across 13 quarters. Past performance does not predict future results.

Portfolio Concentration

856 positions · as of Mar 31, 2026 · Δ vs Dec 31, 2025
Top Position
56.4%
−3.6 pts
Top 5
60.0%
−4.9 pts
Top 10
64.3%
−6.1 pts
HHI
3,196
Jun 2023 → Mar 2026 · range 241 – 7,565
Highly concentrated−420

Portfolio Trend

25 quarters · across all stocks

Sector Breakdown

As of Mar 31, 2026
Sector % Portfolio Value
Technology 60.9% $5,732,400,539
Financial Services 19.2% $1,805,810,521
Industrials 5.0% $470,008,830
Healthcare 4.4% $413,292,518
Basic Materials 2.2% $206,604,368
Utilities 1.7% $161,008,080
Consumer Defensive 1.5% $140,292,386
Consumer Cyclical 1.5% $138,959,231
Communication Services 1.2% $108,658,810
Real Estate 1.0% $91,804,467
Energy 0.8% $76,824,135
Unclassified 0.8% $73,625,229

Last Quarter's Activity

Export CSV
Mar 31, 2026 vs Dec 31, 2025

Added To

Positions the filer increased
25 positions
Ticker Δ Shares Shares Value Open

Trimmed

Positions the filer reduced
25 positions
Ticker Δ Shares Shares Value Open

New Positions

Positions the filer opened this quarter
25 positions
Ticker Shares Value Open

Sold Out

Positions the filer fully exited
25 positions
Ticker Shares Value Open

Portfolio Positions

Export CSV View 13F filing
856 positions · $9,419,289,114 total · as of Mar 31, 2026
Showing 1–50 of 856 positions by value · page 1 of 18
Ticker Company Shares Value (USD) % of Portfolio History