Simplex Trading

Simplex Trading Portfolio holdings

AUM $2.82B
 

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 Return
-0.08%
1 Year Return
+0.16%
3 Year Return
+0.18%
5 Year Return
+3.31%
10 Year Return
+32.83%
AUM
$2.82B
AUM Growth
-$729M
Cap. Flow
-$560M
Cap. Flow %
-19.85%
Top 10 Hldgs %
31.34%
Holding
4,436
New
903
Increased
735
Reduced
755
Closed
942

Top Buys

1
$278M
2
$84.4M
3
$76.9M
4
$74.9M
5
$53.5M

Top Sells

1
$497M
2
$73.7M
3
$49M
4
$48.1M
5
$41.8M

Sector Composition

1Technology22.97%
2Consumer Discretionary12.26%
3Healthcare9.52%
4Communication Services8.42%
5Financials7.07%
Name Market Value Portfolio Weight Shares or Principal Shares
Change %		 Capital Flow
$4.99M﹤0.01% 55,312
+15,136
+38%
+$1.36M
$4.98M﹤0.01% 74,760
+7,513
+11%
+$501K
$4.9M﹤0.01% 300,558
-16,728
-5%
-$273K
$4.89M﹤0.01% 86,365
+65,004
+304%
+$3.68M
$4.86M﹤0.01% 121,615
+66,616
+121%
+$2.66M
$4.84M﹤0.01% 75,819
+6,409
+9%
+$409K
$4.74M﹤0.01% 48,430
-22,961
-32%
-$2.25M
$4.73M﹤0.01% 56,630
+20,183
+55%
+$1.69M
$4.66M﹤0.01% 17,470
-23,235
-57%
-$6.2M
$4.55M﹤0.01%
+17,371
 New
+$4.55M
$4.5M﹤0.01% 439,923
+394,149
+861%
+$4.04M
$4.46M﹤0.01%
+30,512
 New
+$4.46M
$4.29M﹤0.01% 521,623
+302,677
+138%
+$2.49M
$4.27M﹤0.01%
+83,955
 New
+$4.27M
$4.23M﹤0.01%
+176,588
 New
+$4.23M
$4.2M﹤0.01% 165,559
+61,891
+60%
+$1.57M
$4.14M﹤0.01%
+99,373
 New
+$4.14M
$4.11M﹤0.01%
+117,324
 New
+$4.11M
$4.1M﹤0.01% 179,071
+89,562
+100%
+$2.05M
$4.05M﹤0.01% 42,380
+4,229
+11%
+$404K
$4.01M﹤0.01%
+27,450
 New
+$4.01M
$3.93M﹤0.01% 552,241
+470,733
+578%
+$3.35M
$3.9M﹤0.01% 17,673
-26,736
-60%
-$5.9M
$3.9M﹤0.01%
+19,730
 New
+$3.9M
$3.89M﹤0.01% 99,151
+27,360
+38%
+$1.07M
1 34567178