Simplex Trading

Simplex Trading Portfolio holdings

AUM $3.72B
1-Year Est. Return 0.6%
 

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 Quarter Est. Return
1 Year Est. Return
+0.6%
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
+$29.3M
2
+$18.1M
3
+$14.9M
4
BIIB icon
Biogen
BIIB
+$13.7M
5
V icon
Visa
V
+$13.3M

Top Sells

1
+$37.4M
2
+$20.1M
3
+$15.8M
4
C icon
Citigroup
C
+$13.9M
5
MDY icon
SPDR S&P MidCap 400 ETF Trust
MDY
+$12.9M

Sector Composition

1 Communication Services 12.51%
2 Healthcare 12.38%
3 Technology 12.22%
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 0.18%
64,113
+32,106
52
$2.61M 0.17%
73,166
+59,307
53
$2.61M 0.17%
72,332
+47,882
54
$2.58M 0.17%
45,052
+35,821
55
$2.56M 0.17%
+20,066
56
$2.52M 0.17%
+28,914
57
$2.5M 0.17%
98,424
+25,967
58
$2.5M 0.17%
53,312
+20,684
59
$2.5M 0.17%
55,111
+1,563
60
$2.47M 0.17%
+19,039
61
$2.47M 0.17%
23,254
+17,183
62
$2.43M 0.16%
+114,608
63
$2.4M 0.16%
+148,123
64
$2.4M 0.16%
+100,440
65
$2.38M 0.16%
107,417
+104,908
66
$2.38M 0.16%
75,998
+37,816
67
$2.38M 0.16%
+91,484
68
$2.37M 0.16%
93,878
+49,266
69
$2.37M 0.16%
27,600
-50,007
70
$2.36M 0.16%
+171,555
71
$2.35M 0.16%
+16,469
72
$2.32M 0.16%
10,168
-6,857
73
$2.32M 0.16%
+53,310
74
$2.28M 0.15%
103,660
-12,852
75
$2.26M 0.15%
37,286
+18,344
1 2
3
4 5