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 |
iShares MSCI EAFE ETF
EFA
|
+$10.1M |
| 3 |
NIO
NIO
|
+$7.66M |
| 4 |
Alibaba
BABA
|
+$7.54M |
| 5 |
Micron Technology
MU
|
+$6.73M |
Top Sells
| 1 |
NVIDIA
NVDA
|
+$101M |
| 2 |
SPDR Gold Trust
GLD
|
+$15.2M |
| 3 |
Amazon
AMZN
|
+$9.5M |
| 4 |
SPDR S&P 500 ETF Trust
SPY
|
+$8.76M |
| 5 |
Technology Select Sector SPDR Fund
XLK
|
+$7.41M |
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 | |
|---|---|---|---|---|---|---|
1101
Ring Energy
REI
$215M
| $295K | ﹤0.01% |
91,298
+3,462
| +4% | +$11.2K |
|
1102
ProShares Ultra MSCI Emerging Markets
EET
$27.4M
| $294K | ﹤0.01% |
2,771
| – | – |
|
1103
News Corp Class A
NWSA
$16.2B
| $294K | ﹤0.01% |
11,256
+4,297
| +62% | +$112K |
|
|
EVA
1104
DELISTED
Enviva Inc.
EVA
| $294K | ﹤0.01% |
5,499
| – | – |
|
|
ATIP
1105
DELISTED
ATI Physical Therapy, Inc.
ATIP
| $294K | ﹤0.01% |
624
-16
| -3% | -$7.54K |
|
|
VRS
1106
DELISTED
Verso Corporation
VRS
| $293K | ﹤0.01% |
16,764
| – | – |
|
1107
Heritage Insurance Holdings
HRTG
$683M
| $292K | ﹤0.01% |
33,542
| – | – |
|
1108
Immersion
IMMR
$222M
| $292K | ﹤0.01% |
34,425
+100
| +0.3% | +$848 |
|
|
PRVB
1109
DELISTED
Provention Bio, Inc. Common Stock
PRVB
| $292K | ﹤0.01% |
35,067
-4,110
| -10% | -$34.2K |
|
1110
ADMA Biologics
ADMA
$3.76B
| $291K | ﹤0.01% |
183,196
| – | – |
|
1111
Embraer
ERJ
$10.9B
| $291K | ﹤0.01% |
19,698
+100
| +0.5% | +$1.48K |
|
1112
SL Green Realty
SLG
$4.29B
| $291K | ﹤0.01% |
3,561
+100
| +3% | +$8.17K |
|
|
MDRX
1113
DELISTED
Veradigm Inc. Common Stock
MDRX
| $291K | ﹤0.01% |
15,751
-400
| -2% | -$7.39K |
|
|
SWIR
1114
DELISTED
Sierra Wireless
SWIR
| $291K | ﹤0.01% |
15,576
+200
| +1% | +$3.74K |
|
1115
Blue Owl Capital
OWL
$12.1B
| $290K | ﹤0.01% |
22,773
-1,052
| -4% | -$13.4K |
|
1116
PetMed Express
PETS
$56.4M
| $289K | ﹤0.01% |
8,519
-1,013
| -11% | -$34.4K |
|
|
SC
1117
DELISTED
SANTANDER CONSUMER USA HOLDINGS INC
SC
| $289K | ﹤0.01% |
7,940
+1,962
| +33% | +$71.4K |
|
1118
Ubiquiti
UI
$36.6B
| $288K | ﹤0.01% |
923
| – | – |
|
1119
West Pharmaceutical
WST
$18.4B
| $288K | ﹤0.01% |
794
| – | – |
|
1120
BHP
BHP
$135B
| $287K | ﹤0.01% |
4,448
+2,816
| +173% | +$182K |
|
1121
Power Integrations
POWI
$2.5B
| $287K | ﹤0.01% |
3,484
+3,400
| +4,048% | +$280K |
|
1122
Regis Corp
RGS
$66.7M
| $287K | ﹤0.01% |
1,514
| – | – |
|
1123
US Physical Therapy
USPH
$1.23B
| $287K | ﹤0.01% |
2,410
| – | – |
|
|
ZEPP
1124
Zepp Health
ZEPP
$744M
| $287K | ﹤0.01% |
6,192
+188
| +3% | +$8.71K |
|
1125
iShares Russell Mid-Cap Growth ETF
IWP
$20.5B
| $286K | ﹤0.01% |
2,531
| – | – |
|