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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
INBX
9201
CALL
DELISTED
Inhibrx, Inc. Common Stock
INBX
$3K ﹤0.01%
+200
New +$3.6K
ABTS icon
9202
CALL
Abits Group
ABTS
$3.38M
$2K ﹤0.01%
180
+7
+4% +$125
AGS
9203
PUT
DELISTED
PlayAGS
AGS
$2K ﹤0.01%
400
-49,900
-99% -$300K
AIRG icon
9204
CALL
Airgain
AIRG
$74.3M
$2K ﹤0.01%
300
-300
-50% -$2.4K
ALIT icon
9205
PUT
Alight
ALIT
$497M
$2K ﹤0.01%
+15
New +$2.32K
ALRS icon
9206
Alerus Financial
ALRS
$822M
$2K ﹤0.01%
+100
New +$2.36K
AMAL icon
9207
CALL
Amalgamated Financial
AMAL
$1.48B
$2K ﹤0.01%
100
-100
-50% -$2.24K
AMAL icon
9208
PUT
Amalgamated Financial
AMAL
$1.48B
$2K ﹤0.01%
+100
New +$2.24K
APG icon
9209
CALL
APi Group
APG
$17.1B
$2K ﹤0.01%
300
-150
-33% -$1.6K
APEI icon
9210
CALL
American Public Education
APEI
$875M
$2K ﹤0.01%
+300
New +$3.73K
APLT
9211
PUT
DELISTED
Applied Therapeutics
APLT
$2K ﹤0.01%
+3,000
New +$3.6K
ARBE icon
9212
CALL
Arbe Robotics
ARBE
$83.1M
$2K ﹤0.01%
+400
New +$2.48K
ATLC icon
9213
Atlanticus Holdings
ATLC
$1.5B
$2K ﹤0.01%
+97
New +$3.33K
ATOS icon
9214
Atossa Therapeutics
ATOS
$22.8M
$2K ﹤0.01%
213
-127
-37% -$1.84K
ATRO icon
9215
Astronics
ATRO
$3.45B
$2K ﹤0.01%
323
-410
-56% -$3.42K
AUDC icon
9216
CALL
AudioCodes
AUDC
$244M
$2K ﹤0.01%
100
-100
-50% -$2.25K
AVNT icon
9217
Avient
AVNT
$3.45B
$2K ﹤0.01%
+80
New +$3.31K
BAP icon
9218
Credicorp
BAP
$30.9B
$2K ﹤0.01%
23
-10
-30% -$1.28K
BCYC
9219
CALL
Bicycle Therapeutics
BCYC
$270M
$2K ﹤0.01%
100
-2,800
-97% -$66.6K
BELFB
9220
Bel Fuse Inc Class B
BELFB
$3.88B
$2K ﹤0.01%
+84
New +$1.97K
BHE icon
9221
Benchmark Electronics
BHE
$2.91B
$2K ﹤0.01%
+100
New +$2.55K
BBT
9222
PUT
Beacon Financial Corp
BBT
$2.53B
$2K ﹤0.01%
100
– –
BKKT icon
9223
Bakkt Inc
BKKT
$333M
$2K ﹤0.01%
37
– –
BLCN
9224
PUT
DELISTED
Siren ETF Trust Siren NexGen Economy ETF
BLCN
$2K ﹤0.01%
+100
New +$2.66K
BLZE icon
9225
PUT
Backblaze
BLZE
$697M
$2K ﹤0.01%
600
+400
+200% +$2.4K
367 368
369
370 371

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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.