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 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
$32.1M |
| 2 |
PARA
Paramount Global Class B
PARA
|
$23.3M |
| 3 |
Pinduoduo
PDD
|
$17.3M |
| 4 |
Pfizer
PFE
|
$16.8M |
| 5 |
American Airlines Group
AAL
|
$14.5M |
Top Sells
| 1 |
Amazon
AMZN
|
$64.4M |
| 2 |
Alphabet (Google) Class C
GOOG
|
$38.1M |
| 3 |
AutoZone
AZO
|
$32.2M |
| 4 |
SPDR S&P 500 ETF Trust
SPY
|
$25.3M |
| 5 |
Apple
AAPL
|
$22.5M |
Sector Composition
| 1 | Technology | 20.25% |
| 2 | Consumer Discretionary | 15.22% |
| 3 | Healthcare | 10.03% |
| 4 | Financials | 9.2% |
| 5 | Industrials | 9.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
76
MGM Resorts International
MGM
$10.8B
| $4.97M | 0.01% | 130,813 +130,505 | +42,372% | +$4.96M |
|
|
RDS.A
77
DELISTED
Royal Dutch Shell PLC ADS Class A
RDS.A
| $4.88M | 0.01% | +124,530 | New | +$4.88M |
|
|
JMIA
78
Jumia Technologies
JMIA
$1.05B
| $4.77M | 0.01% | 134,522 +17,707 | +15% | +$628K |
|
79
EOG Resources
EOG
$68.2B
| $4.71M | 0.01% | +64,962 | New | +$4.71M |
|
80
Sea Limited
SE
$110B
| $4.64M | 0.01% | 20,804 -21,400 | -51% | -$4.78M |
|
81
Blackrock
BLK
$175B
| $4.52M | 0.01% | 5,998 +4,315 | +256% | +$3.25M |
|
82
Sherwin-Williams
SHW
$91.2B
| $4.51M | 0.01% | 6,114 +4,812 | +370% | +$3.55M |
|
|
GAP
83
The Gap, Inc.
GAP
$8.21B
| $4.48M | 0.01% | 150,430 +130,184 | +643% | +$3.88M |
|
84
Johnson & Johnson
JNJ
$427B
| $4.38M | 0.01% | 26,670 -93,750 | -78% | -$15.4M |
|
85
Nike
NKE
$114B
| $4.36M | 0.01% | 32,782 -14,952 | -31% | -$1.99M |
|
86
Mirion Technologies
MIR
$4.73B
| $4.33M | 0.01% | +415,293 | New | +$4.33M |
|
87
Fair Isaac
FICO
$36.5B
| $4.3M | 0.01% | 8,855 -6,426 | -42% | -$3.12M |
|
88
Unity
U
$16.7B
| $4.3M | 0.01% | +42,854 | New | +$4.3M |
|
89
Direxion Daily Energy Bull 2X Shares
ERX
$233M
| $4.29M | 0.01% | 181,445 +101,905 | +128% | +$2.41M |
|
90
iShares Russell 1000 Value ETF
IWD
$63.5B
| $4.21M | 0.01% | 27,792 +11,567 | +71% | +$1.75M |
|
91
iShares Gold Trust
IAU
$50.6B
| $4.09M | 0.01% | 251,501 +122,174 | +94% | +$1.99M |
|
92
ARK Fintech Innovation ETF
ARKF
$1.34B
| $4.06M | 0.01% | 79,356 +11,251 | +17% | +$575K |
|
93
Dell
DELL
$82.6B
| $4.02M | 0.01% | 45,556 +41,807 | +1,115% | +$3.68M |
|
94
Ferrari
RACE
$85B
| $4.01M | 0.01% | 19,167 +738 | +4% | +$154K |
|
95
iShares Core S&P Small-Cap ETF
IJR
$85.2B
| $3.99M | 0.01% | 36,791 +3,525 | +11% | +$382K |
|
96
Thermo Fisher Scientific
TMO
$186B
| $3.9M | 0.01% | +8,537 | New | +$3.9M |
|
97
Vertex Pharmaceuticals
VRTX
$100B
| $3.88M | 0.01% | 18,054 -8,094 | -31% | -$1.74M |
|
98
Synopsys
SNPS
$112B
| $3.82M | 0.01% | +15,435 | New | +$3.82M |
|
99
Marriott International Class A Common Stock
MAR
$72.7B
| $3.79M | 0.01% | +25,598 | New | +$3.79M |
|
100
Direxion Daily S&P Oil & Gas Exp & Prod Bull 2X Shares
GUSH
$260M
| $3.7M | 0.01% | 52,501 +9,708 | +23% | +$684K |
|