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 |
Financial Select Sector SPDR Fund
XLF
|
$42.3M |
| 2 |
Shopify
SHOP
|
$37.4M |
| 3 |
Verizon
VZ
|
$34M |
| 4 |
iShares China Large-Cap ETF
FXI
|
$33M |
| 5 |
Merck
MRK
|
$28M |
Top Sells
| 1 |
AMC Entertainment Holdings
AMC
|
$38.3M |
| 2 |
Carnival Corp
CCL
|
$37.6M |
| 3 |
GE Aerospace
GE
|
$33M |
| 4 |
Advanced Micro Devices
AMD
|
$30.6M |
| 5 |
Micron Technology
MU
|
$28.3M |
Sector Composition
| 1 | Technology | 20.53% |
| 2 | Consumer Discretionary | 13.81% |
| 3 | Healthcare | 11.39% |
| 4 | Communication Services | 7.32% |
| 5 | Industrials | 6.51% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
PXD
151
DELISTED
Pioneer Natural Resource Co.
PXD
| $4.37M | ﹤0.01% |
+24,025
| New | +$4.37M |
|
152
Target
TGT
$42.1B
| $4.36M | ﹤0.01% |
18,858
+16,406
| +669% | +$3.8M |
|
153
Zillow
Z
$20.4B
| $4.34M | ﹤0.01% |
67,914
+53,214
| +362% | +$3.4M |
|
154
Teva Pharmaceuticals
TEVA
$21.3B
| $4.26M | ﹤0.01% |
531,325
+356,602
| +204% | +$2.86M |
|
155
JD.com
JD
$43.8B
| $4.23M | ﹤0.01% |
60,403
-36,618
| -38% | -$2.57M |
|
156
Illumina
ILMN
$14.9B
| $4.21M | ﹤0.01% |
11,389
+7,964
| +233% | +$2.95M |
|
157
iShares US Home Construction ETF
ITB
$3.21B
| $4.19M | ﹤0.01% |
50,471
+22,076
| +78% | +$1.83M |
|
158
Asana
ASAN
$3.58B
| $4.16M | ﹤0.01% |
+55,783
| New | +$4.16M |
|
159
HDFC Bank
HDB
$181B
| $4.13M | ﹤0.01% |
63,521
+47,044
| +286% | +$3.06M |
|
160
Spotify
SPOT
$145B
| $4.1M | ﹤0.01% |
17,531
+17,490
| +42,659% | +$4.09M |
|
161
Honeywell
HON
$135B
| $4.1M | ﹤0.01% |
19,647
+740
| +4% | +$154K |
|
162
Centene
CNC
$14.1B
| $4.02M | ﹤0.01% |
48,841
+18,327
| +60% | +$1.51M |
|
163
Bilibili
BILI
$9.33B
| $3.96M | ﹤0.01% |
+85,249
| New | +$3.96M |
|
|
WIRE
164
DELISTED
Encore Wire Corp
WIRE
| $3.91M | ﹤0.01% |
+27,309
| New | +$3.91M |
|
165
Tenet Healthcare
THC
$16.6B
| $3.9M | ﹤0.01% |
47,737
+17,912
| +60% | +$1.46M |
|
|
AAWW
166
DELISTED
Atlas Air Worldwide Holdings, Inc.
AAWW
| $3.88M | ﹤0.01% |
41,259
+32,134
| +352% | +$3.02M |
|
167
Digital Turbine
APPS
$453M
| $3.87M | ﹤0.01% |
63,442
+36,939
| +139% | +$2.25M |
|
168
Exxon Mobil
XOM
$477B
| $3.85M | ﹤0.01% |
62,990
-14,908
| -19% | -$912K |
|
169
Jones Lang LaSalle
JLL
$14.3B
| $3.85M | ﹤0.01% |
14,308
+12,642
| +759% | +$3.4M |
|
170
Marvell Technology
MRVL
$53.7B
| $3.85M | ﹤0.01% |
44,041
+40,436
| +1,122% | +$3.54M |
|
171
Rocket Lab Corporation Common Stock
RKLB
$21.2B
| $3.83M | ﹤0.01% |
+311,606
| New | +$3.83M |
|
172
Snowflake
SNOW
$73.4B
| $3.79M | ﹤0.01% |
11,198
+10,276
| +1,115% | +$3.48M |
|
173
XPeng
XPEV
$18.8B
| $3.78M | ﹤0.01% |
75,118
-200,568
| -73% | -$10.1M |
|
174
Tesla
TSLA
$1.08T
| $3.74M | ﹤0.01% |
+10,623
| New | +$3.74M |
|
175
Take-Two Interactive
TTWO
$44.1B
| $3.74M | ﹤0.01% |
21,042
-20,436
| -49% | -$3.63M |
|