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 | |
|---|---|---|---|---|---|---|
|
IAA
376
DELISTED
IAA, Inc. Common Stock
IAA
| $1.58M | ﹤0.01% |
27,755
+450
| +2% | +$25.5K |
|
377
Illumina
ILMN
$15.7B
| $1.57M | ﹤0.01% |
3,425
| – | – |
|
|
HES
378
DELISTED
Hess
HES
| $1.56M | ﹤0.01% |
17,593
+1
| +0% | +$89 |
|
379
Global X Silver Miners ETF NEW
SIL
$2.92B
| $1.56M | ﹤0.01% |
36,686
+2,750
| +8% | +$117K |
|
380
Invesco Senior Loan ETF
BKLN
$6.98B
| $1.56M | ﹤0.01% |
70,408
| – | – |
|
381
Canadian Solar
CSIQ
$748M
| $1.55M | ﹤0.01% |
35,441
-12,806
| -27% | -$559K |
|
382
Under Armour Class C
UA
$2.13B
| $1.55M | ﹤0.01% |
82,256
+1,776
| +2% | +$33.4K |
|
383
United States Natural Gas Fund
UNG
$615M
| $1.54M | ﹤0.01% |
30,126
-3,030
| -9% | -$155K |
|
384
BARK
BARK
$149M
| $1.53M | ﹤0.01% |
146,781
+380
| +0.3% | +$3.96K |
|
385
NNN REIT
NNN
$8.18B
| $1.52M | ﹤0.01% |
32,223
| – | – |
|
386
Vanguard Dividend Appreciation ETF
VIG
$95.8B
| $1.5M | ﹤0.01% |
9,644
+100
| +1% | +$15.6K |
|
387
LiveRamp
RAMP
$1.86B
| $1.5M | ﹤0.01% |
31,983
| – | – |
|
388
Raymond James Financial
RJF
$33B
| $1.5M | ﹤0.01% |
11,374
-5,687
| -33% | -$750K |
|
389
Box
BOX
$4.75B
| $1.5M | ﹤0.01% |
56,183
-3,705
| -6% | -$98.7K |
|
390
Workhorse Group
WKHS
$19.4M
| $1.49M | ﹤0.01% |
382
-99
| -21% | -$387K |
|
391
Weibo
WB
$2.87B
| $1.47M | ﹤0.01% |
27,863
+3,356
| +14% | +$177K |
|
|
SIX
392
DELISTED
Six Flags Entertainment Corp.
SIX
| $1.47M | ﹤0.01% |
33,551
-1,730
| -5% | -$75.9K |
|
393
RAPT Therapeutics
RAPT
$214M
| $1.47M | ﹤0.01% |
5,973
+387
| +7% | +$95.2K |
|
394
Invesco CurrencyShares Euro Currency Trust
FXE
$530M
| $1.47M | ﹤0.01% |
13,252
-100
| -0.7% | -$11.1K |
|
395
Sarepta Therapeutics
SRPT
$1.96B
| $1.46M | ﹤0.01% |
18,711
-90
| -0.5% | -$7.04K |
|
396
Gartner
IT
$18.6B
| $1.46M | ﹤0.01% |
5,873
+200
| +4% | +$49.7K |
|
397
Rapid7
RPD
$1.32B
| $1.46M | ﹤0.01% |
15,180
+710
| +5% | +$68.1K |
|
398
FIGS
FIGS
$1.12B
| $1.45M | ﹤0.01% |
31,662
+10,551
| +50% | +$484K |
|
399
Cameco
CCJ
$33B
| $1.45M | ﹤0.01% |
74,696
+17,283
| +30% | +$335K |
|
400
iShares JPMorgan USD Emerging Markets Bond ETF
EMB
$13.5B
| $1.44M | ﹤0.01% |
12,878
-3,979
| -24% | -$446K |
|