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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
TAOP icon
10101
Taoping
TAOP
$11.7M
– –
-48
Closed -$9K
TARS icon
10102
CALL
Tarsus Pharmaceuticals
TARS
$2.51B
– –
-11,500
Closed -$168K
TCMD icon
10103
PUT
Tactile Systems Technology
TCMD
$623M
– –
-1,000
Closed -$11K
TCOM icon
10104
Trip.com Group
TCOM
$26.8B
– –
-30,465
Closed -$1.13M
TEAM icon
10105
Atlassian
TEAM
$21.7B
– –
-45,339
Closed -$7.23M
TECH icon
10106
Bio-Techne
TECH
$11.2B
– –
-91
Closed -$7.01K
TFX icon
10107
Teleflex
TFX
$5.97B
– –
-1,484
Closed -$360K
TGNA
10108
DELISTED
TEGNA Inc
TGNA
– –
-14,029
Closed -$262K
THD icon
10109
iShares MSCI Thailand ETF
THD
$361M
– –
-1,054
Closed -$79K
THFF icon
10110
First Financial Corp
THFF
$896M
– –
-100
Closed -$4K
THRM icon
10111
CALL
Gentherm
THRM
$1.11B
– –
-1,800
Closed -$117K
THRM icon
10112
PUT
Gentherm
THRM
$1.11B
– –
-100
Closed -$6K
TIGO icon
10113
Millicom
TIGO
$16.4B
$0 ﹤0.01%
49
-16,691
-100% -$291K
TIGR
10114
UP Fintech Holding
TIGR
$897M
$0 ﹤0.01%
165
+104
+170% +$384
TISI icon
10115
Team
TISI
$76.3M
– –
-413
Closed -$2K
TIXT
10116
CALL
DELISTED
TELUS International
TIXT
– –
-300
Closed -$5K
TK icon
10117
Teekay
TK
$968M
– –
-111,403
Closed -$595K
TLSA icon
10118
Tiziana Life Sciences
TLSA
$120M
– –
-465
Closed -$304
TMC icon
10119
PUT
TMC The Metals Company
TMC
$1.7B
– –
-12,800
Closed -$9K
TLYS icon
10120
PUT
Tilly's
TLYS
$116M
– –
-5,300
Closed -$47K
TME icon
10121
Tencent Music
TME
$14.4B
– –
-82,448
Closed -$675K
TMHC icon
10122
Taylor Morrison
TMHC
$6.67B
– –
-2,298
Closed -$80.7K
TNDM icon
10123
Tandem Diabetes Care
TNDM
$1.16B
– –
-18,131
Closed -$751K
TOKE
10124
DELISTED
Cambria Cannabis ETF
TOKE
– –
-100
Closed –
TOUR
10125
Tuniu
TOUR
$57.6M
– –
-1,270
Closed -$25.4K
403 404
405
406 407

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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.