Simplex Trading

CHICAGO, ILfiles as SIMPLEX TRADING, LLC

$3.8bn in 2,733 US stocks at the end of 30 June 2026. The top 10 are 32.9% of the money. It changed about 48.2% of the portfolio this quarter.

Value
$3.8bn
Stocks
2,733
Top 10 share
32.9%
Turnover
48.2%

What changed this quarter

New

Bought for the first time this quarter.

Added

Bought more of a stock they already held.

Cut

Sold some of their stake.

Sold out

Sold their entire stake.

Holdings

Showing the largest 100 of 2,733.

Options (50)
  • State STR Spdr S&P 500 ETF T
    Type
    Put
    Value
    $24.9bn
    Contracts
    33,407,300
  • State STR Spdr S&P 500 ETF T
    Type
    Call
    Value
    $17.0bn
    Contracts
    22,725,000
  • Invesco QQQ TR
    Type
    Put
    Value
    $10.1bn
    Contracts
    13,765,500
  • Invesco QQQ TR
    Type
    Call
    Value
    $8.0bn
    Contracts
    10,904,800
  • Ishares TR
    Type
    Put
    Value
    $7.8bn
    Contracts
    39,367,200
  • Micron Technology
    Type
    Put
    Value
    $3.6bn
    Contracts
    3,140,900
  • Nvidia
    Type
    Call
    Value
    $3.5bn
    Contracts
    17,519,600
  • Ishares TR
    Type
    Call
    Value
    $3.3bn
    Contracts
    26,912,500
  • Nvidia
    Type
    Put
    Value
    $3.3bn
    Contracts
    16,385,300
  • Tesla
    Type
    Call
    Value
    $2.9bn
    Contracts
    7,001,500
  • Tesla
    Type
    Put
    Value
    $2.4bn
    Contracts
    5,799,800
  • Alphabet
    Type
    Call
    Value
    $2.4bn
    Contracts
    6,656,100
  • Apple
    Type
    Call
    Value
    $2.4bn
    Contracts
    8,168,800
  • Micron Technology
    Type
    Call
    Value
    $2.2bn
    Contracts
    1,906,800
  • Meta Platforms
    Type
    Call
    Value
    $2.0bn
    Contracts
    3,620,200
  • Sandisk
    Type
    Put
    Value
    $2.0bn
    Contracts
    864,500
  • Advanced Micro Devices
    Type
    Put
    Value
    $2.0bn
    Contracts
    3,374,900
  • Alphabet
    Type
    Put
    Value
    $1.9bn
    Contracts
    5,428,100
  • Microsoft
    Type
    Call
    Value
    $1.7bn
    Contracts
    4,655,800
  • Apple
    Type
    Put
    Value
    $1.7bn
    Contracts
    5,954,700
  • Advanced Micro Devices
    Type
    Call
    Value
    $1.7bn
    Contracts
    2,951,000
  • Vaneck ETF Trust
    Type
    Put
    Value
    $1.6bn
    Contracts
    3,966,700
  • Spdr Gold TR
    Type
    Call
    Value
    $1.5bn
    Contracts
    3,937,600
  • Amazon.com
    Type
    Call
    Value
    $1.2bn
    Contracts
    5,219,400
  • Meta Platforms
    Type
    Put
    Value
    $1.2bn
    Contracts
    2,084,500
  • Select Sector Spdr TR
    Type
    Put
    Value
    $963m
    Contracts
    12,991,800
  • Microsoft
    Type
    Put
    Value
    $905m
    Contracts
    2,425,900
  • Select Sector Spdr TR
    Type
    Call
    Value
    $883m
    Contracts
    12,448,000
  • Amazon.com
    Type
    Put
    Value
    $831m
    Contracts
    3,486,200
  • Vaneck ETF Trust
    Type
    Call
    Value
    $805m
    Contracts
    3,268,100
  • State STR Spdr DOW Jones IND
    Type
    Call
    Value
    $785m
    Contracts
    1,503,000
  • Broadcom
    Type
    Put
    Value
    $754m
    Contracts
    1,997,300
  • Intel
    Type
    Put
    Value
    $745m
    Contracts
    5,334,900
  • Spdr Gold TR
    Type
    Put
    Value
    $740m
    Contracts
    2,008,600
  • Intel
    Type
    Call
    Value
    $724m
    Contracts
    5,185,300
  • Broadcom
    Type
    Call
    Value
    $695m
    Contracts
    1,841,100
  • Taiwan Semiconductor Manufac
    Type
    Put
    Value
    $630m
    Contracts
    1,320,000
  • Sandisk
    Type
    Call
    Value
    $588m
    Contracts
    258,700
  • Ishares Silver TR
    Type
    Call
    Value
    $584m
    Contracts
    10,916,100
  • Palantir Technologies
    Type
    Put
    Value
    $547m
    Contracts
    4,692,000
  • Netflix
    Type
    Call
    Value
    $530m
    Contracts
    7,425,500
  • UnitedHealth Group
    Type
    Call
    Value
    $508m
    Contracts
    1,223,100
  • Netflix
    Type
    Put
    Value
    $474m
    Contracts
    6,642,600
  • Palantir Technologies
    Type
    Call
    Value
    $423m
    Contracts
    3,628,900
  • Ishares Bitcoin Trust ETF
    Type
    Call
    Value
    $415m
    Contracts
    12,461,100
  • UnitedHealth Group
    Type
    Put
    Value
    $406m
    Contracts
    976,200
  • Space Exploration Techn
    Type
    Call
    Value
    $401m
    Contracts
    2,348,600
  • Marvell Technology
    Type
    Put
    Value
    $395m
    Contracts
    1,326,300
  • Oracle
    Type
    Put
    Value
    $384m
    Contracts
    2,619,100
  • Direxion Shares ETF Trust
    Type
    Put
    Value
    $383m
    Contracts
    1,621,800

Over time and by industry

Value over time

Jun '25
 
Dec '25
 
Jun '26

Value is up 3.2% since 30 June 2025.

Where the money is

Technology32.7%
Retail & consumer8.7%
Media & telecom7.7%
Health care6.1%
Industrials5.7%
Financial services4.7%
Materials3.5%
Everyday goods2.0%
Real estate1.1%
Energy1.1%
Utilities0.9%
Other25.6%

From the fund's 13F filings. They list US stocks and options only, 45 days after each quarter, and leave out cash, bonds, shorts and foreign shares.