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 |
Amazon
AMZN
|
$44.9M |
| 2 |
iShares Russell 2000 ETF
IWM
|
$31.7M |
| 3 |
TWX
Time Warner Inc
TWX
|
$26.1M |
| 4 |
Booking.com
BKNG
|
$21.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
$18.2M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
$42.8M |
| 2 |
Amgen
AMGN
|
$32.3M |
| 3 |
Baidu
BIDU
|
$21.9M |
| 4 |
Micron Technology
MU
|
$21.2M |
| 5 |
Alphabet (Google) Class A
GOOGL
|
$17.7M |
Sector Composition
| 1 | Consumer Discretionary | 21.41% |
| 2 | Technology | 19.71% |
| 3 | Communication Services | 17.68% |
| 4 | Healthcare | 6.08% |
| 5 | Financials | 5.75% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
126
VanEck Gold Miners ETF
GDX
$19B
| $2.02M | 0.08% | 88,162 +61,917 | +236% | +$1.42M |
|
|
USG
127
DELISTED
Usg
USG
| $2.02M | 0.08% | +61,988 | New | +$2.02M |
|
|
B
128
Barrick Mining Corporation
B
$45.4B
| $1.99M | 0.08% | 123,567 +105,595 | +588% | +$1.7M |
|
129
Lumentum
LITE
$9.28B
| $1.98M | 0.08% | 36,370 -265 | -0.7% | -$14.4K |
|
130
Broadcom
AVGO
$1.4T
| $1.96M | 0.08% | +8,062 | New | +$1.96M |
|
131
Mettler-Toledo International
MTD
$26.8B
| $1.95M | 0.08% | 3,120 +414 | +15% | +$259K |
|
132
iShares MSCI Emerging Markets ETF
EEM
$19B
| $1.89M | 0.08% | 42,087 +41,887 | +20,944% | +$1.88M |
|
133
British American Tobacco
BTI
$124B
| $1.87M | 0.08% | 29,915 +13,906 | +87% | +$868K |
|
134
Molson Coors Class B
TAP
$9.98B
| $1.87M | 0.08% | 22,884 +4,392 | +24% | +$359K |
|
135
Regeneron Pharmaceuticals
REGN
$61.5B
| $1.87M | 0.08% | 4,173 -22,748 | -84% | -$10.2M |
|
136
iShares MSCI EAFE ETF
EFA
$66B
| $1.85M | 0.08% | 27,050 -6,684 | -20% | -$458K |
|
137
Advanced Energy
AEIS
$5.65B
| $1.84M | 0.08% | 22,825 -5,274 | -19% | -$426K |
|
138
Aflac
AFL
$57.2B
| $1.84M | 0.08% | 22,633 +2,808 | +14% | +$229K |
|
139
Estee Lauder
EL
$33B
| $1.81M | 0.07% | +16,806 | New | +$1.81M |
|
140
iShares 7-10 Year Treasury Bond ETF
IEF
$35.7B
| $1.78M | 0.07% | +16,679 | New | +$1.78M |
|
141
EQT Corp
EQT
$32.4B
| $1.76M | 0.07% | 27,044 +19,222 | +246% | +$1.25M |
|
142
Nexstar Media Group
NXST
$6.2B
| $1.76M | 0.07% | 28,244 +4,358 | +18% | +$271K |
|
143
WisdomTree Europe Hedged Equity Fund
HEDJ
$1.8B
| $1.75M | 0.07% | 27,029 +23,624 | +694% | +$1.53M |
|
144
MACOM Technology Solutions
MTSI
$9.54B
| $1.74M | 0.07% | 38,968 +35,136 | +917% | +$1.57M |
|
145
SPDR S&P Homebuilders ETF
XHB
$1.92B
| $1.69M | 0.07% | +42,462 | New | +$1.69M |
|
146
Outfront Media
OUT
$3.12B
| $1.68M | 0.07% | +66,704 | New | +$1.68M |
|
147
Cognizant
CTSH
$35.3B
| $1.67M | 0.07% | 23,071 +1,118 | +5% | +$81.1K |
|
148
Foot Locker
FL
$2.36B
| $1.65M | 0.07% | 46,821 -20,946 | -31% | -$738K |
|
149
HDFC Bank
HDB
$182B
| $1.64M | 0.07% | 17,006 +10,762 | +172% | +$1.04M |
|
150
Children's Place
PLCE
$112M
| $1.64M | 0.07% | +13,851 | New | +$1.64M |
|