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Simplex Trading

Simplex Trading Portfolio holdings

AUM $149B
1-Year Est. Return 62.07%
 

Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.

This Fund
S&P 500
This Quarter Est. Return
+8.29%
1 Year Est. Return
+62.07%
3 Year Est. Return
+116.86%
5 Year Est. Return
+116.02%
10 Year Est. Return
+774.44%
AUM
$114B
AUM Growth
+$21.9B
Cap. Flow
+$10.1B
Cap. Flow %
8.87%
Top 10 Hldgs %
37.97%
Holding
10,803
New
1,536
Increased
3,665
Reduced
3,633
Closed
1,729

Top Buys

Rank Stock Value
1
WMT icon
Walmart Inc
WMT
+$43.6M
2
AAPL icon
Apple
AAPL
+$40.9M
3
OIH icon
VanEck Oil Services ETF
OIH
+$37.7M
4
C icon
Citigroup
C
+$34.2M
5
TLT icon
iShares 20+ Year Treasury Bond ETF
TLT
+$32.7M

Top Sells

Rank Stock Value
1
AMZN icon
Amazon
AMZN
+$189M
2
QQQ icon
Invesco QQQ Trust
QQQ
+$123M
3
NVDA icon
NVIDIA
NVDA
+$115M
4
TSLA icon
Tesla
TSLA
+$52M
5
META icon
Meta Platforms (Facebook)
META
+$49M

Sector Composition

Rank Sector Weight
1 Technology 0.42%
2 Consumer Discretionary 0.2%
3 Healthcare 0.17%
4 Industrials 0.15%
5 Communication Services 0.13%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
BLV icon
9026
Vanguard Long-Term Bond ETF
BLV
$5.75B
– –
-3
Closed –
BMA icon
9027
Banco Macro
BMA
$5.7B
– –
-6,790
Closed -$135K
BMRA icon
9028
CALL
Biomerica
BMRA
$4.88M
– –
-313
Closed -$8K
BMY icon
9029
Bristol-Myers Squibb
BMY
$127B
– –
-210,946
Closed -$14.9M
BNDD icon
9030
Quadratic Deflation ETF
BNDD
$65.4M
– –
-94
Closed -$11K
BNGO icon
9031
Bionano Genomics
BNGO
$12.7M
– –
-85
Closed -$75.5K
BNTX icon
9032
BioNTech
BNTX
$22.6B
$0 ﹤0.01%
7
-6,676
-100% -$917K
BOC icon
9033
Boston Omaha
BOC
$429M
– –
-6
Closed -$149
BOIL icon
9034
ProShares Ultra Bloomberg Natural Gas
BOIL
$417M
– –
-74
Closed -$106K
BORR
9035
Borr Drilling
BORR
$1.31B
– –
-21,313
Closed -$137K
BR icon
9036
PUT
Broadridge
BR
$17.2B
– –
-2,400
Closed -$321K
BRAG
9037
Bragg Gaming Group
BRAG
$43M
– –
-1,711
Closed -$6.69K
BRBR icon
9038
BellRing Brands
BRBR
$1.51B
– –
-68
Closed -$2.01K
BRCC icon
9039
BRC Inc
BRCC
$126M
– –
-23,965
Closed -$150K
BRFS
9040
PUT
DELISTED
BRF SA
BRFS
– –
-800
Closed -$1K
BRKL
9041
DELISTED
Brookline Bancorp
BRKL
– –
-8,230
Closed -$104K
BRX icon
9042
Brixmor Property Group
BRX
$9.95B
– –
-181
Closed -$4.03K
BRX icon
9043
PUT
Brixmor Property Group
BRX
$9.95B
– –
-2,800
Closed -$63K
BSAC icon
9044
Banco Santander Chile
BSAC
$15.8B
– –
-128
Closed -$2.15K
BSAC icon
9045
PUT
Banco Santander Chile
BSAC
$15.8B
– –
-400
Closed -$6K
BSET icon
9046
Bassett Furniture
BSET
$169M
– –
-1,947
Closed -$36.1K
STEX
9047
PUT
Streamex Corp
STEX
$76.7M
– –
-1,310
Closed -$5K
BSM icon
9048
Black Stone Minerals
BSM
$3.11B
– –
-31,445
Closed -$492K
BSV icon
9049
Vanguard Short-Term Bond ETF
BSV
$44.6B
– –
-1,116
Closed -$84K
BSY icon
9050
Bentley Systems
BSY
$9.54B
– –
-14,108
Closed -$561K
360 361
362
363 364

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Simplex Trading's Q1 2023 Portfolio in Review

As of Q1 2023, Simplex Trading held 10,803 positions worth $114B, up 24% from $91.9B the previous quarter. Its ten largest holdings account for 38% of the portfolio.

Simplex Trading deployed $10.1B of net new capital in Q1 2023, opening 1,536 new positions and adding to 3,665 existing holdings. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M.

By sector, the portfolio is most concentrated in Technology at 0.42% of assets, up from 0.35% a quarter earlier, followed by Consumer Discretionary and Healthcare.

On the sell side, the largest reduction was Meta Platforms (Facebook), an estimated $49M trimmed.

  • Simplex Trading's largest Q1 2023 buy was Walmart Inc: 918,957 shares worth $45.2M.
  • Simplex Trading added most to Apple in Q1 2023, an estimated $40.9M increase.
  • Simplex Trading's biggest Q1 2023 reduction was Meta Platforms (Facebook), cutting an estimated $49M.
  • Simplex Trading fully exited Amazon in Q1 2023, selling an estimated $189M.
  • Simplex Trading's ten largest holdings make up 38% of its $114B portfolio in Q1 2023.
  • Simplex Trading opened 1,536 new positions and closed 1,729 in Q1 2023.
  • Simplex Trading's portfolio value rose 24% quarter-over-quarter to $114B.

Based on Simplex Trading's 13F filing for Q1 2023, filed 27 Apr 2023.