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 |
NVIDIA
NVDA
|
$114M |
| 2 |
Citigroup
C
|
$77M |
| 3 |
Broadcom
AVGO
|
$53M |
| 4 |
Pinduoduo
PDD
|
$49.7M |
| 5 |
Intel
INTC
|
$44.5M |
Top Sells
| 1 |
Energy Select Sector SPDR Fund
XLE
|
$92.5M |
| 2 |
Pfizer
PFE
|
$67.5M |
| 3 |
Boeing
BA
|
$66.7M |
| 4 |
Direxion Daily Semiconductor Bull 3X Shares
SOXL
|
$44.9M |
| 5 |
PayPal
PYPL
|
$44.4M |
Sector Composition
| 1 | Technology | 27.91% |
| 2 | Consumer Discretionary | 14.92% |
| 3 | Healthcare | 10.74% |
| 4 | Financials | 10.11% |
| 5 | Materials | 6.23% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
151
Zillow
Z
$20.2B
| $3.81M | ﹤0.01% |
+82,074
| New | +$3.81M |
|
152
Tower Semiconductor
TSEM
$6.96B
| $3.78M | ﹤0.01% |
96,107
+33,437
| +53% | +$1.31M |
|
153
Johnson Controls International
JCI
$68.9B
| $3.71M | ﹤0.01% |
+55,797
| New | +$3.71M |
|
|
SGI
154
Somnigroup International Inc.
SGI
$17.8B
| $3.71M | ﹤0.01% |
+78,340
| New | +$3.71M |
|
155
Vodafone
VOD
$28.2B
| $3.68M | ﹤0.01% |
414,540
-279,940
| -40% | -$2.48M |
|
156
Diamondback Energy
FANG
$41.2B
| $3.66M | ﹤0.01% |
+18,274
| New | +$3.66M |
|
157
Enterprise Products Partners
EPD
$68.9B
| $3.62M | ﹤0.01% |
+124,952
| New | +$3.62M |
|
158
Steel Dynamics
STLD
$19.1B
| $3.61M | ﹤0.01% |
+27,905
| New | +$3.61M |
|
159
TransDigm Group
TDG
$72B
| $3.59M | ﹤0.01% |
2,810
-709
| -20% | -$906K |
|
160
NIO
NIO
$14.2B
| $3.59M | ﹤0.01% |
862,777
-411,207
| -32% | -$1.71M |
|
161
Tenet Healthcare
THC
$16.5B
| $3.59M | ﹤0.01% |
26,958
+15,256
| +130% | +$2.03M |
|
162
AB InBev
BUD
$116B
| $3.55M | ﹤0.01% |
61,009
+54,501
| +837% | +$3.17M |
|
163
BlackLine
BL
$3.26B
| $3.52M | ﹤0.01% |
72,736
+54,307
| +295% | +$2.63M |
|
164
MSCI
MSCI
$42.7B
| $3.51M | ﹤0.01% |
+7,285
| New | +$3.51M |
|
165
NexGen Energy
NXE
$4.5B
| $3.49M | ﹤0.01% |
500,556
+412,286
| +467% | +$2.88M |
|
166
SPDR Portfolio S&P 500 Growth ETF
SPYG
$40.4B
| $3.44M | ﹤0.01% |
42,908
+16,609
| +63% | +$1.33M |
|
167
ZIM Integrated Shipping Services
ZIM
$1.63B
| $3.43M | ﹤0.01% |
154,687
+83,296
| +117% | +$1.85M |
|
168
Hubbell
HUBB
$22.8B
| $3.42M | ﹤0.01% |
9,361
+9,266
| +9,754% | +$3.39M |
|
169
MongoDB
MDB
$25.5B
| $3.42M | ﹤0.01% |
13,683
+9,365
| +217% | +$2.34M |
|
170
Li Auto
LI
$24.4B
| $3.41M | ﹤0.01% |
190,905
+9,857
| +5% | +$176K |
|
171
Nu Holdings
NU
$72B
| $3.39M | ﹤0.01% |
+263,081
| New | +$3.39M |
|
172
Novavax
NVAX
$1.2B
| $3.39M | ﹤0.01% |
+267,431
| New | +$3.39M |
|
173
ArcBest
ARCB
$1.65B
| $3.38M | ﹤0.01% |
31,590
-8,067
| -20% | -$864K |
|
174
Golar LNG
GLNG
$4.48B
| $3.38M | ﹤0.01% |
107,801
+27,479
| +34% | +$861K |
|
175
VanEck Junior Gold Miners ETF
GDXJ
$6.91B
| $3.37M | ﹤0.01% |
+80,020
| New | +$3.37M |
|