Simplex Trading Portfolio holdings
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.
Top Buys
| 1 | +$278M | |
| 2 | +$84.4M | |
| 3 | +$76.9M | |
| 4 |
TSMC
TSM
|
+$74.9M |
| 5 |
Amazon
AMZN
|
+$53.5M |
Top Sells
| 1 | +$497M | |
| 2 | +$73.7M | |
| 3 | +$49M | |
| 4 |
Advanced Micro Devices
AMD
|
+$48.1M |
| 5 |
Uber
UBER
|
+$41.8M |
Sector Composition
| 1 | Technology | 22.9% |
| 2 | Consumer Discretionary | 12.26% |
| 3 | Healthcare | 9.52% |
| 4 | Communication Services | 8.42% |
| 5 | Financials | 7.07% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
126
IBM
IBM
$282B
| $3.88M | ﹤0.01% |
+15,625
|
|
||
127
Celsius Holdings
CELH
$15.7B
| $3.87M | ﹤0.01% |
108,690
-428,404
|
|
||
128
Chewy
CHWY
$13.4B
| $3.74M | ﹤0.01% |
115,156
-2,664
|
|
||
129
ICICI Bank
IBN
$109B
| $3.68M | ﹤0.01% |
116,892
+58,822
|
|
||
130
NuScale Power
SMR
$5.01B
| $3.63M | ﹤0.01% |
256,248
+25,463
|
|
||
131
AES
AES
$9.83B
| $3.63M | ﹤0.01% |
291,962
+66,724
|
|
||
132
Danaher
DHR
$149B
| $3.6M | ﹤0.01% |
17,549
-43,915
|
|
||
133
CleanSpark
CLSK
$4.92B
| $3.56M | ﹤0.01% |
529,643
-457,439
|
|
||
134
Enovix
ENVX
$2.47B
| $3.55M | ﹤0.01% |
553,426
+353,765
|
|
||
135
Vistra
VST
$63.9B
| $3.49M | ﹤0.01% |
29,711
+900
|
|
||
136
Eos Energy Enterprises
EOSE
$4.01B
| $3.44M | ﹤0.01% |
910,716
+860,629
|
|
||
137
Philips
PHG
$26.5B
| $3.35M | ﹤0.01% |
137,694
+130,258
|
|
||
138
Salesforce
CRM
$242B
| $3.35M | ﹤0.01% |
12,498
-15,705
|
|
||
139
NextDecade
NEXT
$1.6B
| $3.34M | ﹤0.01% |
429,322
+33,685
|
|
||
140
Zoetis
ZTS
$53.4B
| $3.33M | ﹤0.01% |
20,229
+7,872
|
|
||
141
Capri Holdings
CPRI
$2.52B
| $3.18M | ﹤0.01% |
+161,008
|
|
||
142
Thermo Fisher Scientific
TMO
$212B
| $3.11M | ﹤0.01% |
6,244
+4,691
|
|
||
143
MSCI
MSCI
$43.4B
| $3.1M | ﹤0.01% |
+5,490
|
|
||
144
Utilities Select Sector SPDR Fund
XLU
$21.8B
| $3.1M | ﹤0.01% |
39,277
-115,694
|
|
||
145
Elbit Systems
ESLT
$21.6B
| $3.04M | ﹤0.01% |
7,918
+6,862
|
|
||
146
Freeport-McMoran
FCX
$57.7B
| $3.02M | ﹤0.01% |
79,758
-180,775
|
|
||
147
Roku
ROKU
$15.8B
| $3.02M | ﹤0.01% |
42,853
-79,206
|
|
||
148
Gartner
IT
$16.9B
| $3M | ﹤0.01% |
7,154
+6,856
|
|
||
149
Burlington
BURL
$17B
| $2.96M | ﹤0.01% |
12,438
+7,076
|
|
||
150
Viking Therapeutics
VKTX
$4B
| $2.96M | ﹤0.01% |
122,755
+90,614
|
|