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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
-4.86%
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
$88.5B
AUM Growth
-$5.62B
Cap. Flow
-$2.04B
Cap. Flow %
-2.3%
Top 10 Hldgs %
38.07%
Holding
11,570
New
1,564
Increased
4,281
Reduced
3,851
Closed
1,575

Top Buys

Rank Stock Value
1
MSFT icon
Microsoft
MSFT
+$114M
2
NVDA icon
NVIDIA
NVDA
+$85.9M
3
C icon
Citigroup
C
+$61.5M
4
BRK.B icon
Berkshire Hathaway Class B
BRK.B
+$45.5M
5
PFE icon
Pfizer
PFE
+$41.6M

Top Sells

Rank Stock Value
1
AAPL icon
Apple
AAPL
+$467M
2
VOO icon
Vanguard S&P 500 ETF
VOO
+$71.2M
3
META icon
Meta Platforms (Facebook)
META
+$47.6M
4
INTC icon
Intel
INTC
+$41.9M
5
TSM icon
TSMC
TSM
+$35.9M

Sector Composition

Rank Sector Weight
1 Technology 0.51%
2 Financials 0.35%
3 Consumer Discretionary 0.3%
4 Healthcare 0.25%
5 Industrials 0.18%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
BRBR icon
9226
CALL
BellRing Brands
BRBR
$1.51B
$2K ﹤0.01%
100
-1,800
-95% -$43.2K
STEX
9227
Streamex Corp
STEX
$76.7M
$2K ﹤0.01%
382
-293
-43% -$2.28K
BTAI icon
9228
PUT
BioXcel Therapeutics
BTAI
$26.2M
$2K ﹤0.01%
13
– –
BVS icon
9229
Bioventus
BVS
$799M
$2K ﹤0.01%
422
+351
+494% +$2.75K
CABA icon
9230
CALL
Cabaletta Bio
CABA
$439M
$2K ﹤0.01%
+3,300
New +$3.97K
CGEM icon
9231
PUT
Cullinan Oncology
CGEM
$1.05B
$2K ﹤0.01%
200
-200
-50% -$2.69K
CMBM
9232
DELISTED
Cambium Networks
CMBM
$2K ﹤0.01%
+170
New +$3.05K
COWZ icon
9233
Pacer US Cash Cows 100 ETF
COWZ
$18.2B
$2K ﹤0.01%
70
-769
-92% -$34.5K
CQQQ icon
9234
Invesco China Technology ETF
CQQQ
$2.95B
$2K ﹤0.01%
71
-129
-65% -$5.72K
CRBP icon
9235
PUT
Corbus Pharmaceuticals
CRBP
$170M
$2K ﹤0.01%
530
-457
-46% -$3.22K
CRNT icon
9236
Ceragon Networks
CRNT
$194M
$2K ﹤0.01%
+1,222
New +$2.91K
CTOS icon
9237
Custom Truck One Source
CTOS
$2.47B
$2K ﹤0.01%
+433
New +$2.7K
CVRX icon
9238
CALL
CVRx
CVRX
$126M
$2K ﹤0.01%
+300
New +$2.38K
CVRX icon
9239
CVRx
CVRX
$126M
$2K ﹤0.01%
+296
New +$2.34K
CYN icon
9240
Cyngn
CYN
$15.6M
– –
0
– –
DAVE icon
9241
Dave Inc
DAVE
$5.12B
$2K ﹤0.01%
241
-819
-77% -$15.1K
DCTH icon
9242
Delcath Systems
DCTH
$422M
$2K ﹤0.01%
+788
New +$3.19K
DFIN icon
9243
Donnelley Financial Solutions
DFIN
$1.21B
$2K ﹤0.01%
72
-150
-68% -$5.63K
KUST
9244
PUT
Kustom Entertainment Inc
KUST
$846K
– –
0
– –
DMAC icon
9245
DiaMedica Therapeutics
DMAC
$363M
$2K ﹤0.01%
+2,005
New +$3.13K
DNTH icon
9246
Dianthus Therapeutics
DNTH
$5.68B
$2K ﹤0.01%
103
-16
-13% -$438
DTIL icon
9247
PUT
Precision BioSciences
DTIL
$188M
$2K ﹤0.01%
57
-346
-86% -$16.4K
EBIZ icon
9248
Global X E-commerce ETF
EBIZ
$26.9M
$2K ﹤0.01%
195
+95
+95% +$1.67K
EEX
9249
CALL
DELISTED
Emerald Holding
EEX
$2K ﹤0.01%
+800
New +$2.89K
EFC
9250
Ellington Financial
EFC
$1.68B
$2K ﹤0.01%
+241
New +$3.6K
368 369
370
371 372

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Simplex Trading's Q3 2022 Portfolio in Review

As of Q3 2022, Simplex Trading held 11,570 positions worth $88.5B, down 6% from $94.1B the previous quarter. Its ten largest holdings account for 38% of the portfolio.

Simplex Trading's Q3 2022 filing shows 1,564 new, 4,281 increased, 3,851 reduced and 1,575 closed positions. Its largest new stake was Microsoft: 432,062 shares worth $101M. The largest sale was Apple, an estimated $467M.

By sector, the portfolio is most concentrated in Technology at 0.51% of assets, down from 0.84% a quarter earlier, followed by Financials and Consumer Discretionary.

  • Simplex Trading's largest Q3 2022 buy was Microsoft: 432,062 shares worth $101M.
  • Simplex Trading added most to NVIDIA in Q3 2022, an estimated $85.9M increase.
  • Simplex Trading's biggest Q3 2022 reduction was Apple, cutting an estimated $467M.
  • Simplex Trading fully exited iShares Core S&P 500 ETF in Q3 2022, selling an estimated $34.3M.
  • Simplex Trading's ten largest holdings make up 38% of its $88.5B portfolio in Q3 2022.
  • Simplex Trading opened 1,564 new positions and closed 1,575 in Q3 2022.
  • Simplex Trading's portfolio value fell 6% quarter-over-quarter to $88.5B.

Based on Simplex Trading's 13F filing for Q3 2022, filed 4 Nov 2022.