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
|
+$114M |
| 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 | |
|---|---|---|---|---|---|---|
1126
Zymeworks
ZYME
$1.19B
| $103K | ﹤0.01% |
12,111
+8,965
| +285% | +$76.2K |
|
1127
TopBuild
BLD
$11.7B
| $102K | ﹤0.01% |
266
-6,823
| -96% | -$2.62M |
|
1128
Diodes
DIOD
$2.45B
| $101K | ﹤0.01% |
1,411
+1,253
| +793% | +$89.7K |
|
1129
Installed Building Products
IBP
$7.27B
| $101K | ﹤0.01% |
494
-207
| -30% | -$42.3K |
|
1130
Pampa Energía
PAM
$3.23B
| $101K | ﹤0.01% |
+2,301
| New | +$101K |
|
1131
Direxion Daily MSCI India Bull 2X Shares
INDL
$68M
| $100K | ﹤0.01% |
1,427
-1,046
| -42% | -$73.3K |
|
|
VNET
1132
VNET Group
VNET
$2.57B
| $100K | ﹤0.01% |
47,850
-27,994
| -37% | -$58.5K |
|
1133
Xenon Pharmaceuticals
XENE
$2.79B
| $100K | ﹤0.01% |
2,589
-1,388
| -35% | -$53.6K |
|
1134
Teradata
TDC
$2B
| $99K | ﹤0.01% |
+2,872
| New | +$99K |
|
1135
Freedom Holding
FRHC
$10.1B
| $99K | ﹤0.01% |
1,323
-3,280
| -71% | -$245K |
|
1136
JetBlue
JBLU
$1.84B
| $99K | ﹤0.01% |
+16,411
| New | +$99K |
|
1137
Magnite
MGNI
$3.4B
| $99K | ﹤0.01% |
+7,524
| New | +$99K |
|
1138
PDS Biotechnology
PDSB
$55M
| $99K | ﹤0.01% |
33,841
+12,188
| +56% | +$35.7K |
|
1139
PRA Group
PRAA
$656M
| $99K | ﹤0.01% |
+5,081
| New | +$99K |
|
1140
Teucrium Soybean Fund
SOYB
$25.7M
| $99K | ﹤0.01% |
+4,189
| New | +$99K |
|
1141
Black Diamond Therapeutics
BDTX
$184M
| $98K | ﹤0.01% |
21,034
+13,542
| +181% | +$63.1K |
|
|
ESGR
1142
DELISTED
Enstar Group
ESGR
| $98K | ﹤0.01% |
+321
| New | +$98K |
|
1143
Huazhu Hotels Group
HTHT
$11.4B
| $98K | ﹤0.01% |
+2,954
| New | +$98K |
|
1144
KraneShares California Carbon Allowance Strategy ETF
KCCA
$146M
| $97K | ﹤0.01% |
+4,361
| New | +$97K |
|
1145
W&T Offshore
WTI
$258M
| $97K | ﹤0.01% |
45,541
+24,198
| +113% | +$51.5K |
|
1146
Aldeyra Therapeutics
ALDX
$323M
| $96K | ﹤0.01% |
29,302
-64,163
| -69% | -$210K |
|
|
CIM
1147
Chimera Investment
CIM
$1.15B
| $96K | ﹤0.01% |
7,556
-16,081
| -68% | -$204K |
|
1148
Future Fuel
FF
$169M
| $96K | ﹤0.01% |
+18,828
| New | +$96K |
|
1149
Qualys
QLYS
$4.82B
| $96K | ﹤0.01% |
680
-73
| -10% | -$10.3K |
|
|
SBOW
1150
DELISTED
SilverBow Resources, Inc.
SBOW
| $96K | ﹤0.01% |
+2,543
| New | +$96K |
|