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
$791M
AUM Growth
+$153M
Cap. Flow
Cap. Flow %
Top 10 Hldgs %
Holding
3,551
New
Increased
Reduced
Closed

Top Buys

1
+$21.4M
2
+$17.3M
3
+$15M
4
BIIB icon
Biogen
BIIB
+$14.9M
5
V icon
Visa
V
+$14.1M

Top Sells

1
+$36.7M
2
+$20.1M
3
+$15.8M
4
C icon
Citigroup
C
+$14.7M
5
MDY icon
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
+$13.1M

Sector Composition

1 Communication Services 12.51%
2 Healthcare 12.39%
3 Technology 12.2%
4 Consumer Discretionary 8.59%
5 Financials 8.53%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
51
$2.63M 0.33%
64,113
+32,106
52
$2.61M 0.33%
73,166
+59,307
53
$2.61M 0.33%
72,332
+47,882
54
$2.58M 0.33%
45,052
+35,821
55
$2.56M 0.32%
+20,066
56
$2.52M 0.32%
+28,914
57
$2.5M 0.32%
98,424
+25,967
58
$2.5M 0.32%
53,312
+20,684
59
$2.5M 0.32%
55,111
+1,563
60
$2.47M 0.31%
+19,039
61
$2.47M 0.31%
23,254
+17,183
62
$2.43M 0.31%
+114,608
63
$2.4M 0.3%
+148,123
64
$2.4M 0.3%
+100,440
65
$2.38M 0.3%
107,417
+104,908
66
$2.38M 0.3%
75,998
+37,816
67
$2.38M 0.3%
+91,484
68
$2.37M 0.3%
93,878
+49,266
69
$2.37M 0.3%
27,600
-50,007
70
$2.36M 0.3%
+171,555
71
$2.35M 0.3%
+16,469
72
$2.32M 0.29%
10,168
-6,857
73
$2.32M 0.29%
+53,310
74
$2.28M 0.29%
103,660
-12,852
75
$2.26M 0.29%
37,286
+18,344
1 2
3
4 5