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 |
Invesco QQQ Trust
QQQ
|
$85.4M |
| 2 |
SPDR Gold Trust
GLD
|
$75.9M |
| 3 |
NVIDIA
NVDA
|
$42.6M |
| 4 |
Netflix
NFLX
|
$41.1M |
| 5 |
iShares MSCI EAFE ETF
EFA
|
$40.5M |
Top Sells
| 1 |
Apple
AAPL
|
$65.7M |
| 2 |
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
|
$25.5M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
$24.4M |
| 4 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
$24.3M |
| 5 |
Broadcom
AVGO
|
$21.3M |
Sector Composition
| 1 | Technology | 15.2% |
| 2 | Consumer Discretionary | 14.52% |
| 3 | Communication Services | 10.57% |
| 4 | Healthcare | 8.15% |
| 5 | Financials | 7.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
176
iShares Russell 2000 Growth ETF
IWO
$12.4B
| $1.86M | ﹤0.01% |
8,978
-14,537
| -62% | -$3.01M |
|
177
Ultragenyx Pharmaceutical
RARE
$3.07B
| $1.84M | ﹤0.01% |
23,579
+8,294
| +54% | +$649K |
|
178
Delta Air Lines
DAL
$39.9B
| $1.78M | ﹤0.01% |
+63,626
| New | +$1.78M |
|
179
Adverum Biotechnologies
ADVM
$72.4M
| $1.78M | ﹤0.01% |
8,522
+7,292
| +593% | +$1.52M |
|
180
Welltower
WELL
$112B
| $1.77M | ﹤0.01% |
34,281
+10,021
| +41% | +$519K |
|
181
Winnebago Industries
WGO
$1.03B
| $1.77M | ﹤0.01% |
+26,592
| New | +$1.77M |
|
|
MRTX
182
DELISTED
Mirati Therapeutics, Inc. Common Stock
MRTX
| $1.75M | ﹤0.01% |
15,322
+10,098
| +193% | +$1.15M |
|
183
Axalta
AXTA
$6.87B
| $1.72M | ﹤0.01% |
76,459
+38,661
| +102% | +$872K |
|
184
Universal Health Services
UHS
$12.1B
| $1.72M | ﹤0.01% |
18,526
+2,357
| +15% | +$219K |
|
185
ProShares UltraPro Short Dow 30
SDOW
$177M
| $1.72M | ﹤0.01% |
4,470
+221
| +5% | +$85K |
|
|
ABMD
186
DELISTED
Abiomed Inc
ABMD
| $1.72M | ﹤0.01% |
7,112
+2,292
| +48% | +$553K |
|
187
Cintas
CTAS
$82.2B
| $1.7M | ﹤0.01% |
25,604
-37,904
| -60% | -$2.52M |
|
|
MNDT
188
DELISTED
Mandiant, Inc. Common Stock
MNDT
| $1.68M | ﹤0.01% |
137,890
+58,925
| +75% | +$717K |
|
|
SGI
189
Somnigroup International Inc.
SGI
$18.2B
| $1.68M | ﹤0.01% |
+93,280
| New | +$1.68M |
|
190
BioXcel Therapeutics
BTAI
$57.9M
| $1.66M | ﹤0.01% |
1,961
-698
| -26% | -$592K |
|
|
FLIR
191
DELISTED
FLIR Systems, Inc. (DE) Common Stock
FLIR
| $1.66M | ﹤0.01% |
40,893
+28,873
| +240% | +$1.17M |
|
192
The Mosaic Company
MOS
$10.2B
| $1.65M | ﹤0.01% |
132,150
+125,430
| +1,867% | +$1.57M |
|
193
Utilities Select Sector SPDR Fund
XLU
$20.6B
| $1.65M | ﹤0.01% |
29,236
+26,536
| +983% | +$1.5M |
|
194
Advance Auto Parts
AAP
$3.59B
| $1.64M | ﹤0.01% |
11,507
+1,441
| +14% | +$205K |
|
|
PARA
195
DELISTED
Paramount Global Class B
PARA
| $1.63M | ﹤0.01% |
70,111
-245,491
| -78% | -$5.72M |
|
196
Energy Transfer Partners
ET
$59.8B
| $1.62M | ﹤0.01% |
227,410
-37,238
| -14% | -$265K |
|
197
Fastly
FSLY
$1.08B
| $1.6M | ﹤0.01% |
18,840
+8,866
| +89% | +$754K |
|
198
US Foods
USFD
$17.4B
| $1.6M | ﹤0.01% |
81,195
+61,147
| +305% | +$1.21M |
|
199
Direxion Daily S&P Oil & Gas Exp & Prod Bull 2X Shares
GUSH
$244M
| $1.58M | ﹤0.01% |
184,000
+168,372
| +1,077% | +$1.44M |
|
200
Enbridge
ENB
$105B
| $1.58M | ﹤0.01% |
+51,780
| New | +$1.58M |
|