Simplex Trading

Simplex Trading Portfolio holdings

AUM $3.56B
1-Year Est. Return 50.35%
 

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
1 Year Est. Return
+50.35%
3 Year Est. Return
5 Year Est. Return
10 Year Est. Return
AUM
$1.5B
AUM Growth
+$480M
Cap. Flow
Cap. Flow %
Top 10 Hldgs %
Holding
3,620
New
Increased
Reduced
Closed

Top Buys

1
+$70.1M
2
+$46.6M
3
+$37.4M
4
AMZN icon
Amazon
AMZN
+$37M
5
TSLA icon
Tesla
TSLA
+$28M

Top Sells

1
+$41M
2
+$27.8M
3
+$18.9M
4
GLD icon
SPDR Gold Trust
GLD
+$18.3M
5
DIA icon
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
+$13.6M

Sector Composition

1 Technology 22.74%
2 Consumer Discretionary 17.54%
3 Communication Services 10.02%
4 Healthcare 9.29%
5 Industrials 5.63%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
101
$2.73M 0.18%
30,549
+18,544
102
$2.69M 0.18%
1,311
-4,234
103
$2.69M 0.18%
24,879
-31,018
104
$2.63M 0.18%
59,210
-129
105
$2.63M 0.17%
+22,521
106
$2.62M 0.17%
97,313
+48,976
107
$2.57M 0.17%
47,563
+44,405
108
$2.56M 0.17%
28,107
+5,065
109
$2.56M 0.17%
147,759
+47,744
110
$2.52M 0.17%
13,308
+3,015
111
$2.51M 0.17%
+51,508
112
$2.5M 0.17%
24,369
+13,223
113
$2.49M 0.17%
11,334
-9,157
114
$2.48M 0.16%
+27,421
115
$2.45M 0.16%
49,171
+25,081
116
$2.44M 0.16%
+19,551
117
$2.42M 0.16%
29,445
+5,678
118
$2.4M 0.16%
11,620
+11,584
119
$2.38M 0.16%
+65,902
120
$2.34M 0.16%
20,282
+2,637
121
$2.3M 0.15%
15,185
+13,741
122
$2.3M 0.15%
+40,794
123
$2.29M 0.15%
20,794
-7,904
124
$2.27M 0.15%
2,117
+1,821
125
$2.25M 0.15%
1,977
+1,553
3 4
5
6 7