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 |
NVIDIA
NVDA
|
$141M |
| 2 |
Citigroup
C
|
$77M |
| 3 |
Broadcom
AVGO
|
$53M |
| 4 |
Pinduoduo
PDD
|
$49.7M |
| 5 |
Intel
INTC
|
$44.5M |
Top Sells
| 1 |
Energy Select Sector SPDR Fund
XLE
|
$92.5M |
| 2 |
Pfizer
PFE
|
$67.5M |
| 3 |
Boeing
BA
|
$66.7M |
| 4 |
Direxion Daily Semiconductor Bull 3X Shares
SOXL
|
$44.9M |
| 5 |
PayPal
PYPL
|
$44.4M |
Sector Composition
| 1 | Technology | 27.91% |
| 2 | Consumer Discretionary | 14.92% |
| 3 | Healthcare | 10.74% |
| 4 | Financials | 10.11% |
| 5 | Materials | 6.23% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
101
Dow Inc
DOW
$17.5B
| $5.71M | ﹤0.01% | +107,630 | New | +$5.71M |
|
102
Expedia Group
EXPE
$26.6B
| $5.68M | ﹤0.01% | +45,075 | New | +$5.68M |
|
103
Foot Locker
FL
$2.36B
| $5.51M | ﹤0.01% | 221,002 +110,436 | +100% | +$2.75M |
|
104
Snap
SNAP
$12.1B
| $5.48M | ﹤0.01% | 330,085 +163,196 | +98% | +$2.71M |
|
105
Home Depot
HD
$405B
| $5.48M | ﹤0.01% | +15,912 | New | +$5.48M |
|
106
Albemarle
ALB
$9.99B
| $5.44M | ﹤0.01% | 56,960 -93,190 | -62% | -$8.9M |
|
107
Financial Select Sector SPDR Fund
XLF
$54.1B
| $5.35M | ﹤0.01% | +130,252 | New | +$5.35M |
|
108
Darling Ingredients
DAR
$5.37B
| $5.35M | ﹤0.01% | 145,465 +90,354 | +164% | +$3.32M |
|
109
Riot Platforms
RIOT
$5.09B
| $5.33M | ﹤0.01% | 582,822 -104,000 | -15% | -$950K |
|
110
Regeneron Pharmaceuticals
REGN
$61.5B
| $5.29M | ﹤0.01% | +5,037 | New | +$5.29M |
|
|
GTM
111
ZoomInfo Technologies
GTM
$3.47B
| $5.27M | ﹤0.01% | 412,461 +248,078 | +151% | +$3.17M |
|
112
Trane Technologies
TT
$92.5B
| $5.25M | ﹤0.01% | 15,951 -5,629 | -26% | -$1.85M |
|
113
Delta Air Lines
DAL
$40.3B
| $5.22M | ﹤0.01% | +110,114 | New | +$5.22M |
|
114
Petrobras
PBR
$79.9B
| $5.16M | ﹤0.01% | 356,130 +272,012 | +323% | +$3.94M |
|
115
Palantir
PLTR
$372B
| $5.15M | ﹤0.01% | +203,462 | New | +$5.15M |
|
116
Global Payments
GPN
$21.5B
| $5.14M | ﹤0.01% | +53,153 | New | +$5.14M |
|
117
Realty Income
O
$53.7B
| $5.1M | ﹤0.01% | 96,536 +88,372 | +1,082% | +$4.67M |
|
118
Las Vegas Sands
LVS
$39.6B
| $5.07M | ﹤0.01% | 114,594 -61,171 | -35% | -$2.71M |
|
119
Caterpillar
CAT
$196B
| $5.06M | ﹤0.01% | 15,201 +8,422 | +124% | +$2.81M |
|
120
Truist Financial
TFC
$60.4B
| $5.01M | ﹤0.01% | 129,031 -40,803 | -24% | -$1.58M |
|
121
Dynatrace
DT
$15.3B
| $5.01M | ﹤0.01% | 111,946 +94,913 | +557% | +$4.25M |
|
122
Sea Limited
SE
$110B
| $4.85M | ﹤0.01% | 67,891 -197,566 | -74% | -$14.1M |
|
123
Teva Pharmaceuticals
TEVA
$21.1B
| $4.82M | ﹤0.01% | 296,468 -361,219 | -55% | -$5.87M |
|
|
WBA
124
DELISTED
Walgreens Boots Alliance
WBA
| $4.81M | ﹤0.01% | 397,983 -220,648 | -36% | -$2.67M |
|
125
Biogen
BIIB
$19.4B
| $4.8M | ﹤0.01% | +20,713 | New | +$4.8M |
|