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
$278M0.18%
+3,057,978
 New
+$278M
$121M0.08% 1,113,380
+709,408
+176%
+$76.9M
$84.4M0.05%
+545,647
 New
+$84.4M
$79.8M0.05% 480,522
+451,305
+1,545%
+$74.9M
$76.8M0.05% 3,380,296
-190,644
-5%
-$4.33M
$56.8M0.04% 653,938
+613,262
+1,508%
+$53.3M
$55.3M0.04% 248,768
-2,235,748
-90%
-$497M
$53.5M0.03%
+281,158
 New
+$53.5M
$41M0.03% 1,616,802
+50,149
+3%
+$1.27M
$36.8M0.02% 519,037
-168,447
-25%
-$12M
$34.1M0.02% 537,279
-53,645
-9%
-$3.41M
$32.8M0.02%
+35,144
 New
+$32.8M
$30.4M0.02% 117,279
+107,115
+1,054%
+$27.8M
$30.3M0.02% 328,925
+65,746
+25%
+$6.05M
$27.2M0.02% 135,142
+75,144
+125%
+$15.2M
$27M0.02% 252,824
+67,022
+36%
+$7.16M
$25.8M0.02% 78,302
-8,753
-10%
-$2.88M
$24M0.02% 1,235,654
-582,333
-32%
-$11.3M
$23.5M0.02%
+503,019
 New
+$23.5M
$23.1M0.01% 253,933
+151,761
+149%
+$13.8M
$22.7M0.01% 650,233
+647,364
+22,564%
+$22.6M
$22.5M0.01% 332,331
-125,135
-27%
-$8.48M
$20.1M0.01% 495,320
+39,852
+9%
+$1.62M
$19.6M0.01% 1,055,768
-122,901
-10%
-$2.28M
$19.5M0.01% 241,039
-61,655
-20%
-$5M
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