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 | |
|---|---|---|---|---|---|---|
126
Bilibili
BILI
$9.26B
| $4.77M | ﹤0.01% |
309,090
-26,614
| -8% | -$411K |
|
127
SentinelOne
S
$5.86B
| $4.69M | ﹤0.01% |
222,888
+127,598
| +134% | +$2.69M |
|
128
Direxion Daily Technology Bull 3x Shares
TECL
$3.42B
| $4.65M | ﹤0.01% |
+47,767
| New | +$4.65M |
|
129
Schlumberger
SLB
$53B
| $4.65M | ﹤0.01% |
+98,507
| New | +$4.65M |
|
130
BJs Wholesale Club
BJ
$12.7B
| $4.65M | ﹤0.01% |
+52,882
| New | +$4.65M |
|
131
International Flavors & Fragrances
IFF
$16.6B
| $4.6M | ﹤0.01% |
48,347
+4,973
| +11% | +$473K |
|
132
MasTec
MTZ
$14.2B
| $4.59M | ﹤0.01% |
42,945
-5,112
| -11% | -$547K |
|
133
Marathon Petroleum
MPC
$54.6B
| $4.55M | ﹤0.01% |
+26,203
| New | +$4.55M |
|
134
Canadian Solar
CSIQ
$664M
| $4.47M | ﹤0.01% |
303,387
-129,488
| -30% | -$1.91M |
|
135
American Eagle Outfitters
AEO
$3.02B
| $4.47M | ﹤0.01% |
223,721
+222,952
| +28,992% | +$4.45M |
|
136
Avis
CAR
$5.44B
| $4.39M | ﹤0.01% |
41,967
+8,408
| +25% | +$879K |
|
|
FLG
137
Flagstar Financial, Inc.
FLG
$5.41B
| $4.37M | ﹤0.01% |
452,418
+174,344
| +63% | +$1.68M |
|
138
American Tower
AMT
$91.4B
| $4.34M | ﹤0.01% |
22,325
-55,303
| -71% | -$10.7M |
|
139
Teradyne
TER
$19B
| $4.32M | ﹤0.01% |
+29,115
| New | +$4.32M |
|
140
Viking Therapeutics
VKTX
$2.92B
| $4.31M | ﹤0.01% |
81,307
+23,308
| +40% | +$1.24M |
|
141
ProShares UltraPro Short QQQ
SQQQ
$2.37B
| $4.31M | ﹤0.01% |
104,042
-62,604
| -38% | -$2.59M |
|
142
Adobe
ADBE
$145B
| $4.31M | ﹤0.01% |
7,751
-16,103
| -68% | -$8.94M |
|
143
Industrial Select Sector SPDR Fund
XLI
$23.1B
| $4.25M | ﹤0.01% |
+34,907
| New | +$4.25M |
|
144
Cigna
CI
$80.7B
| $4.25M | ﹤0.01% |
12,859
-16,554
| -56% | -$5.47M |
|
145
Kenvue
KVUE
$39.2B
| $4.21M | ﹤0.01% |
231,311
+138,954
| +150% | +$2.53M |
|
146
Comcast
CMCSA
$126B
| $4.08M | ﹤0.01% |
104,298
-42,490
| -29% | -$1.66M |
|
|
147
Direxion Daily Semiconductor Bull 3X Shares
SOXL
$10.7B
| $4.03M | ﹤0.01% |
72,855
-811,822
| -92% | -$44.9M |
|
148
iShares Core S&P 500 ETF
IVV
$662B
| $3.98M | ﹤0.01% |
+7,269
| New | +$3.98M |
|
149
T Rowe Price
TROW
$24.4B
| $3.96M | ﹤0.01% |
34,336
+17,230
| +101% | +$1.99M |
|
150
Invitation Homes
INVH
$18.5B
| $3.89M | ﹤0.01% |
108,459
+106,306
| +4,938% | +$3.81M |
|