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 | |
|---|---|---|---|---|---|---|
226
US Foods
USFD
$17.4B
| $2.71M | ﹤0.01% |
71,115
-40
| -0.1% | -$1.52K |
|
227
SPDR S&P Metals & Mining ETF
XME
$2.29B
| $2.71M | ﹤0.01% |
62,516
-899
| -1% | -$38.9K |
|
228
Pultegroup
PHM
$27.5B
| $2.68M | ﹤0.01% |
47,969
+4,021
| +9% | +$224K |
|
229
Ferrari
RACE
$87.7B
| $2.64M | ﹤0.01% |
12,992
-1,301
| -9% | -$265K |
|
|
DQ
230
Daqo New Energy
DQ
$1.93B
| $2.63M | ﹤0.01% |
39,779
+493
| +1% | +$32.6K |
|
|
SGI
231
Somnigroup International Inc.
SGI
$18.3B
| $2.62M | ﹤0.01% |
63,144
+17,259
| +38% | +$716K |
|
232
MongoDB
MDB
$26.6B
| $2.6M | ﹤0.01% |
7,274
-435
| -6% | -$156K |
|
233
Carvana
CVNA
$50B
| $2.59M | ﹤0.01% |
8,425
+1,450
| +21% | +$446K |
|
234
Buckle
BKE
$3.08B
| $2.58M | ﹤0.01% |
51,491
+2,344
| +5% | +$117K |
|
|
HIMX
235
Himax Technologies
HIMX
$1.45B
| $2.58M | ﹤0.01% |
162,171
+4,928
| +3% | +$78.4K |
|
236
FTAI Aviation
FTAI
$15.8B
| $2.56M | ﹤0.01% |
89,729
| – | – |
|
237
Melco Resorts & Entertainment
MLCO
$3.85B
| $2.56M | ﹤0.01% |
152,827
+4,346
| +3% | +$72.7K |
|
238
United Parks & Resorts
PRKS
$3B
| $2.55M | ﹤0.01% |
49,856
+1,811
| +4% | +$92.7K |
|
|
MIC
239
DELISTED
Macquarie Infrastructure Holdings, LLC
MIC
| $2.55M | ﹤0.01% |
65,940
+7,251
| +12% | +$281K |
|
240
AngloGold Ashanti
AU
$29.8B
| $2.54M | ﹤0.01% |
136,253
+200
| +0.1% | +$3.73K |
|
241
Canadian Natural Resources
CNQ
$63.8B
| $2.51M | ﹤0.01% |
139,068
-409
| -0.3% | -$7.38K |
|
242
Cummins
CMI
$54.8B
| $2.51M | ﹤0.01% |
10,347
| – | – |
|
243
Thermo Fisher Scientific
TMO
$186B
| $2.49M | ﹤0.01% |
4,893
-366
| -7% | -$186K |
|
244
Direxion Daily S&P Oil & Gas Exp & Prod Bull 2X Shares
GUSH
$246M
| $2.49M | ﹤0.01% |
98,636
-1,200
| -1% | -$30.2K |
|
245
Incyte
INCY
$16.7B
| $2.48M | ﹤0.01% |
29,547
-100
| -0.3% | -$8.4K |
|
|
CS
246
DELISTED
Credit Suisse Group
CS
| $2.47M | ﹤0.01% |
233,517
| – | – |
|
247
Ally Financial
ALLY
$12.8B
| $2.46M | ﹤0.01% |
48,755
+112
| +0.2% | +$5.64K |
|
248
DexCom
DXCM
$31.4B
| $2.45M | ﹤0.01% |
22,932
-3,000
| -12% | -$320K |
|
|
TTM
249
DELISTED
Tata Motors Limited
TTM
| $2.45M | ﹤0.01% |
106,522
-200
| -0.2% | -$4.59K |
|
250
Citizens Financial Group
CFG
$22.2B
| $2.44M | ﹤0.01% |
52,554
-100
| -0.2% | -$4.65K |
|