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 | |
|---|---|---|---|---|---|---|
|
TELL
326
DELISTED
Tellurian Inc.
TELL
| $1.83M | ﹤0.01% |
392,854
+16,500
| +4% | +$76.9K |
|
327
Wheaton Precious Metals
WPM
$47.3B
| $1.83M | ﹤0.01% |
41,513
-900
| -2% | -$39.6K |
|
|
NEWR
328
DELISTED
New Relic, Inc.
NEWR
| $1.82M | ﹤0.01% |
27,341
-502
| -2% | -$33.4K |
|
|
HZNP
329
DELISTED
Horizon Therapeutics Public Limited Company Ordinary Shares
HZNP
| $1.81M | ﹤0.01% |
18,769
-930
| -5% | -$89.8K |
|
330
Dollar General
DG
$24.1B
| $1.8M | ﹤0.01% |
8,267
+3,155
| +62% | +$687K |
|
331
Rio Tinto
RIO
$104B
| $1.8M | ﹤0.01% |
21,750
-2,310
| -10% | -$191K |
|
332
Colgate-Palmolive
CL
$68.8B
| $1.8M | ﹤0.01% |
22,007
| – | – |
|
333
Renaissance IPO ETF
IPO
$165M
| $1.79M | ﹤0.01% |
27,471
| – | – |
|
334
Zillow
Z
$21.3B
| $1.77M | ﹤0.01% |
14,700
-1,312
| -8% | -$158K |
|
335
NovoCure
NVCR
$1.37B
| $1.77M | ﹤0.01% |
9,332
-1,416
| -13% | -$269K |
|
336
3D Systems Corporation
DDD
$272M
| $1.77M | ﹤0.01% |
45,946
+224
| +0.5% | +$8.62K |
|
337
Mettler-Toledo International
MTD
$26.9B
| $1.76M | ﹤0.01% |
1,277
| – | – |
|
|
NOAH
338
Noah Holdings
NOAH
$797M
| $1.76M | ﹤0.01% |
38,053
-1,200
| -3% | -$55.5K |
|
339
D.R. Horton
DHI
$54.2B
| $1.75M | ﹤0.01% |
18,863
+9,567
| +103% | +$888K |
|
340
Lithia Motors
LAD
$8.74B
| $1.75M | ﹤0.01% |
4,956
+1,600
| +48% | +$565K |
|
|
MOMO
341
Hello Group
MOMO
$1.37B
| $1.75M | ﹤0.01% |
114,286
-5,370
| -4% | -$82.1K |
|
342
Interactive Brokers
IBKR
$26.8B
| $1.75M | ﹤0.01% |
105,536
-36
| -0% | -$596 |
|
343
Zillow
ZG
$20.5B
| $1.74M | ﹤0.01% |
14,337
+679
| +5% | +$82.5K |
|
344
Vroom, Inc. Common Stock
VRM
$140M
| $1.74M | ﹤0.01% |
511
| – | – |
|
345
Teva Pharmaceuticals
TEVA
$21.7B
| $1.73M | ﹤0.01% |
174,723
| – | – |
|
346
EOG Resources
EOG
$64.4B
| $1.73M | ﹤0.01% |
20,105
-3,474
| -15% | -$299K |
|
347
Harley-Davidson
HOG
$3.67B
| $1.73M | ﹤0.01% |
36,725
-681
| -2% | -$32K |
|
348
Nexstar Media Group
NXST
$6.31B
| $1.72M | ﹤0.01% |
11,374
+200
| +2% | +$30.3K |
|
349
iShares MSCI Japan ETF
EWJ
$15.5B
| $1.72M | ﹤0.01% |
25,497
-600
| -2% | -$40.5K |
|
350
Comerica
CMA
$8.85B
| $1.71M | ﹤0.01% |
23,750
| – | – |
|