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 |
Advanced Micro Devices
AMD
|
$17.7M |
| 2 |
NVIDIA
NVDA
|
$11.3M |
| 3 |
iShares MSCI EAFE ETF
EFA
|
$10.1M |
| 4 |
NIO
NIO
|
$7.66M |
| 5 |
Alibaba
BABA
|
$7.54M |
Top Sells
| 1 |
SPDR Gold Trust
GLD
|
$15.2M |
| 2 |
Amazon
AMZN
|
$9.5M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
$8.76M |
| 4 |
Technology Select Sector SPDR Fund
XLK
|
$7.41M |
| 5 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
$5.3M |
Sector Composition
| 1 | Technology | 18.66% |
| 2 | Consumer Discretionary | 14.99% |
| 3 | Communication Services | 10.06% |
| 4 | Healthcare | 9.68% |
| 5 | Financials | 9.59% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
101
Marathon Petroleum
MPC
$54.6B
| $6.34M | 0.01% | 103,521 +1,688 | +2% | +$103K |
|
102
iShares Expanded Tech-Software Sector ETF
IGV
$9.84B
| $6.31M | 0.01% | 16,169 -698 | -4% | -$272K |
|
103
Okta
OKTA
$16.4B
| $6.12M | 0.01% | 25,437 +1,504 | +6% | +$362K |
|
104
Direxion Daily Financial Bull 3x Shares
FAS
$2.74B
| $6.12M | 0.01% | 54,679 +35,317 | +182% | +$3.95M |
|
105
Comcast
CMCSA
$125B
| $6.12M | 0.01% | 105,938 +29,724 | +39% | +$1.72M |
|
106
IBM
IBM
$227B
| $6.06M | 0.01% | 41,279 -11,530 | -22% | -$1.69M |
|
107
FedEx
FDX
$54.5B
| $6M | 0.01% | 20,075 +2,554 | +15% | +$764K |
|
108
QuantumScape
QS
$4.49B
| $5.97M | 0.01% | 215,702 +17,708 | +9% | +$490K |
|
|
PARA
109
DELISTED
Paramount Global Class B
PARA
| $5.93M | 0.01% | 131,915 +14,931 | +13% | +$671K |
|
110
Spirit AeroSystems
SPR
$4.88B
| $5.88M | 0.01% | 123,396 +58 | +0% | +$2.76K |
|
111
Caesars Entertainment
CZR
$5.57B
| $5.83M | 0.01% | 56,644 -4,604 | -8% | -$474K |
|
112
Fiverr
FVRR
$870M
| $5.72M | 0.01% | 23,836 +85 | +0.4% | +$20.4K |
|
113
iQIYI
IQ
$2.55B
| $5.61M | 0.01% | 370,620 -10,386 | -3% | -$157K |
|
|
GAP
114
The Gap, Inc.
GAP
$8.21B
| $5.46M | 0.01% | 162,964 +10,827 | +7% | +$363K |
|
115
Editas Medicine
EDIT
$231M
| $5.42M | 0.01% | 95,876 +423 | +0.4% | +$23.9K |
|
116
GE Aerospace
GE
$292B
| $5.37M | 0.01% | 398,629 +514 | +0.1% | +$6.93K |
|
117
Caterpillar
CAT
$196B
| $5.35M | 0.01% | 24,701 -2,034 | -8% | -$441K |
|
118
Atlassian
TEAM
$46.6B
| $5.3M | 0.01% | 20,509 -1,200 | -6% | -$310K |
|
119
Zscaler
ZS
$43.1B
| $5.25M | ﹤0.01% | 24,546 +300 | +1% | +$64.1K |
|
120
Schlumberger
SLB
$55B
| $5.24M | ﹤0.01% | 158,371 +14,494 | +10% | +$479K |
|
121
The Mosaic Company
MOS
$10.6B
| $5.22M | ﹤0.01% | 164,343 +51,379 | +45% | +$1.63M |
|
122
NRG Energy
NRG
$28.2B
| $5.16M | ﹤0.01% | 127,329 -12,272 | -9% | -$497K |
|
123
Global X Lithium & Battery Tech ETF
LIT
$1.08B
| $5.09M | ﹤0.01% | 70,659 -47 | -0.1% | -$3.39K |
|
124
Align Technology
ALGN
$10.3B
| $5.05M | ﹤0.01% | 8,159 +100 | +1% | +$61.9K |
|
125
Cassava Sciences
SAVA
$110M
| $5.05M | ﹤0.01% | 56,882 +7,414 | +15% | +$658K |
|