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Simplex Trading

Simplex Trading Portfolio holdings

AUM $171B
1-Year Est. Return 85%
 

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
+85%
3 Year Est. Return
+183.25%
5 Year Est. Return
+145.21%
10 Year Est. Return
+1,056.84%
AUM
$114B
AUM Growth
+$21.9B
Cap. Flow
-$49.6M
Cap. Flow %
-0.04%
Top 10 Hldgs %
37.97%
Holding
10,803
New
1,536
Increased
3,663
Reduced
3,631
Closed
1,728

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 Miscellaneous 98.51%
2 Technology 0.42%
3 Consumer Discretionary 0.2%
4 Healthcare 0.17%
5 Industrials 0.15%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
TAOP icon
10101
Taoping
TAOP
$7.65M
– –
-48
Closed -$9K
TARS icon
10102
CALL
Tarsus Pharmaceuticals
TARS
$3.98B
– –
-11,500
Closed -$168K
TCMD icon
10103
PUT
Tactile Systems Technology
TCMD
$495M
– –
-1,000
Closed -$11K
TCOM icon
10104
Trip.com Group
TCOM
$25.8B
– –
-30,465
Closed -$1.13M
TEAM icon
10105
Atlassian
TEAM
$48B
– –
-45,339
Closed -$7.23M
TECH icon
10106
Bio-Techne
TECH
$11.4B
– –
-91
Closed -$7.01K
TFX icon
10107
Teleflex
TFX
$5.86B
– –
-1,484
Closed -$360K
TGNA
10108
DELISTED
TEGNA Inc
TGNA
– –
-14,029
Closed -$262K
THD icon
10109
iShares MSCI Thailand ETF
THD
$341M
– –
-1,054
Closed -$79K
THFF icon
10110
First Financial Corp
THFF
$944M
– –
-100
Closed -$4K
THRM icon
10111
CALL
Gentherm
THRM
$1.25B
– –
-1,800
Closed -$117K
THRM icon
10112
PUT
Gentherm
THRM
$1.25B
– –
-100
Closed -$6K
TIGO icon
10113
Millicom
TIGO
$15.9B
$0 ﹤0.01%
49
-16,691
-100% -$291K
TIGR
10114
UP Fintech Holding
TIGR
$914M
$0 ﹤0.01%
165
+104
+170% +$384
TISI icon
10115
Team
TISI
$128M
– –
-413
Closed -$2K
TIXT
10116
CALL
DELISTED
TELUS International
TIXT
– –
-300
Closed -$5K
TK icon
10117
Teekay
TK
$1.2B
– –
-111,403
Closed -$595K
TLSA icon
10118
Tiziana Life Sciences
TLSA
$130M
– –
-465
Closed -$304
TMC icon
10119
PUT
TMC The Metals Company
TMC
$1.96B
– –
-12,800
Closed -$9K
TLYS icon
10120
PUT
Tilly's
TLYS
$135M
– –
-5,300
Closed -$47K
TME icon
10121
Tencent Music
TME
$13.5B
– –
-82,448
Closed -$675K
TMHC
10122
DELISTED
Taylor Morrison
TMHC
– –
-2,298
Closed -$80.7K
TNDM icon
10123
Tandem Diabetes Care
TNDM
$1.38B
– –
-18,131
Closed -$751K
TOKE
10124
DELISTED
Cambria Cannabis ETF
TOKE
– –
-100
Closed –
TOUR
10125
Tuniu
TOUR
$54.8M
– –
-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's Q1 2023 filing shows 1,536 new, 3,663 increased, 3,631 reduced and 1,728 closed positions. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M. The largest sale was Amazon, an estimated $189M.

By sector, the portfolio is most concentrated in Miscellaneous at 99% of assets, up from 98% a quarter earlier, followed by Technology and Consumer Discretionary.

  • 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 1,728 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.