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 | |
|---|---|---|---|---|---|---|
351
Lightspeed Commerce
LSPD
$1.65B
| $1.71M | ﹤0.01% |
20,309
-279
| -1% | -$23.5K |
|
352
Oneok
OKE
$45.7B
| $1.71M | ﹤0.01% |
30,035
-8,507
| -22% | -$484K |
|
353
Prudential Financial
PRU
$37.2B
| $1.69M | ﹤0.01% |
16,327
| – | – |
|
354
Dropbox
DBX
$8.06B
| $1.69M | ﹤0.01% |
55,779
+13,160
| +31% | +$398K |
|
355
Planet Fitness
PLNT
$8.77B
| $1.68M | ﹤0.01% |
22,306
| – | – |
|
356
AdvisorShares Pure US Cannabis ETF
MSOS
$837M
| $1.68M | ﹤0.01% |
40,956
-934
| -2% | -$38.2K |
|
357
CyberArk
CYBR
$23.3B
| $1.67M | ﹤0.01% |
12,698
+500
| +4% | +$65.8K |
|
358
Domino's
DPZ
$15.7B
| $1.67M | ﹤0.01% |
3,575
| – | – |
|
|
EVRI
359
DELISTED
Everi Holdings
EVRI
| $1.66M | ﹤0.01% |
64,697
-355
| -0.5% | -$9.13K |
|
360
ProShares Ultra S&P500
SSO
$7.2B
| $1.65M | ﹤0.01% |
27,410
+802
| +3% | +$48.3K |
|
|
CCXI
361
DELISTED
ChemoCentryx, Inc.
CCXI
| $1.64M | ﹤0.01% |
124,407
+1,907
| +2% | +$25.2K |
|
362
ProShares UltraPro Short Russell2000
SRTY
$79.3M
| $1.64M | ﹤0.01% |
37,406
+160
| +0.4% | +$7K |
|
363
The Greenbrier Companies
GBX
$1.46B
| $1.62M | ﹤0.01% |
37,396
| – | – |
|
364
STAAR Surgical
STAA
$1.38B
| $1.62M | ﹤0.01% |
10,740
+300
| +3% | +$45.3K |
|
365
Madrigal Pharmaceuticals
MDGL
$9.65B
| $1.61M | ﹤0.01% |
16,214
+51
| +0.3% | +$5.07K |
|
366
Regeneron Pharmaceuticals
REGN
$60.8B
| $1.61M | ﹤0.01% |
2,801
+338
| +14% | +$194K |
|
|
CGC
367
Canopy Growth
CGC
$456M
| $1.6M | ﹤0.01% |
6,696
-436
| -6% | -$104K |
|
|
EXPR
368
DELISTED
Express, Inc.
EXPR
| $1.6M | ﹤0.01% |
11,759
+743
| +7% | +$101K |
|
|
AHT
369
Ashford Hospitality Trust
AHT
$37.7M
| $1.6M | ﹤0.01% |
37,045
+33,597
| +974% | +$1.45M |
|
370
Credit Acceptance
CACC
$5.87B
| $1.6M | ﹤0.01% |
3,534
| – | – |
|
|
GOOS
371
Canada Goose Holdings
GOOS
$1.3B
| $1.6M | ﹤0.01% |
36,108
-1,415
| -4% | -$62.6K |
|
|
KC
372
Kingsoft Cloud Holdings
KC
$3.78B
| $1.59M | ﹤0.01% |
46,352
-3,525
| -7% | -$121K |
|
373
CommScope
COMM
$3.55B
| $1.59M | ﹤0.01% |
72,377
-800
| -1% | -$17.5K |
|
374
8x8 Inc
EGHT
$282M
| $1.58M | ﹤0.01% |
57,257
| – | – |
|
375
Cigna
CI
$81.5B
| $1.58M | ﹤0.01% |
6,612
+380
| +6% | +$90.5K |
|