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 |
NVIDIA
NVDA
|
$11.3M |
| 3 |
iShares MSCI EAFE ETF
EFA
|
$10.1M |
| 4 |
NIO
NIO
|
$7.66M |
| 5 |
Alibaba
BABA
|
$7.54M |
Top Sells
| 1 |
SPDR Gold Trust
GLD
|
$15.2M |
| 2 |
Amazon
AMZN
|
$9.5M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
$8.76M |
| 4 |
Technology Select Sector SPDR Fund
XLK
|
$7.41M |
| 5 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
$5.3M |
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 | |
|---|---|---|---|---|---|---|
4276
Bath & Body Works
BBWI
$6.18B
| – | – | -14,522 | Closed | -$1.05M |
|
4277
Best Buy
BBY
$15.6B
| – | – | 0 | – | – |
|
4278
BCB Bancorp
BCBP
$153M
| $0 | ﹤0.01% | 1 | – | – |
|
4279
BCE
BCE
$23.3B
| – | – | 0 | – | – |
|
|
BCLI
4280
DELISTED
BRAINSTORM CELL THERAPUTC
BCLI
| $0 | ﹤0.01% | 200 | – | – |
|
4281
Brink's
BCO
$4.67B
| – | – | 0 | – | – |
|
4282
Bain Capital Specialty
BCSF
$1.03B
| $0 | ﹤0.01% | 40 | – | – |
|
|
BDN
4283
Brandywine Realty Trust
BDN
$740M
| – | – | 0 | – | – |
|