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
|
$216M |
| 2 |
Apple
AAPL
|
$159M |
| 3 |
Broadcom
AVGO
|
$128M |
| 4 |
Booking.com
BKNG
|
$62.2M |
| 5 |
SPDR S&P 500 ETF Trust
SPY
|
$61.9M |
Top Sells
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
$141M |
| 2 |
Amazon
AMZN
|
$53.1M |
| 3 |
TSMC
TSM
|
$45.7M |
| 4 |
Netflix
NFLX
|
$45.3M |
| 5 |
Pfizer
PFE
|
$38.3M |
Sector Composition
| 1 | Technology | 34.74% |
| 2 | Communication Services | 9% |
| 3 | Consumer Discretionary | 8.67% |
| 4 | Healthcare | 8.07% |
| 5 | Financials | 6.4% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
176
Gilead Sciences
GILD
$143B
| $2.95M | ﹤0.01% |
+26,577
| New | +$2.95M |
|
177
Norwegian Cruise Line
NCLH
$11.6B
| $2.92M | ﹤0.01% |
+143,802
| New | +$2.92M |
|
178
monday.com
MNDY
$9.57B
| $2.9M | ﹤0.01% |
9,234
+7,112
| +335% | +$2.24M |
|
179
EQT Corp
EQT
$32.2B
| $2.87M | ﹤0.01% |
+49,291
| New | +$2.87M |
|
180
Planet Fitness
PLNT
$8.77B
| $2.87M | ﹤0.01% |
26,363
+13,314
| +102% | +$1.45M |
|
181
Novartis
NVS
$251B
| $2.87M | ﹤0.01% |
+23,703
| New | +$2.87M |
|
182
Robert Half
RHI
$3.77B
| $2.85M | ﹤0.01% |
+69,468
| New | +$2.85M |
|
183
Ally Financial
ALLY
$12.7B
| $2.81M | ﹤0.01% |
+72,167
| New | +$2.81M |
|
184
Sempra
SRE
$52.9B
| $2.77M | ﹤0.01% |
36,497
+28,429
| +352% | +$2.15M |
|
185
Viking Therapeutics
VKTX
$3.03B
| $2.75M | ﹤0.01% |
103,820
-18,935
| -15% | -$502K |
|
186
Energy Fuels
UUUU
$2.67B
| $2.75M | ﹤0.01% |
477,576
+90,337
| +23% | +$519K |
|
187
Marathon Petroleum
MPC
$54.8B
| $2.74M | ﹤0.01% |
16,498
-2,128
| -11% | -$353K |
|
188
Civitas Resources
CIVI
$3.19B
| $2.69M | ﹤0.01% |
97,895
+79,347
| +428% | +$2.18M |
|
|
FLG
189
Flagstar Financial, Inc.
FLG
$5.39B
| $2.69M | ﹤0.01% |
254,125
+92,238
| +57% | +$977K |
|
190
Vanguard FTSE Europe ETF
VGK
$26.9B
| $2.67M | ﹤0.01% |
34,405
+24,903
| +262% | +$1.93M |
|
191
Tenet Healthcare
THC
$17.3B
| $2.66M | ﹤0.01% |
15,110
+11,346
| +301% | +$2M |
|
192
BJs Wholesale Club
BJ
$12.8B
| $2.6M | ﹤0.01% |
24,081
+15,812
| +191% | +$1.7M |
|
193
Mirion Technologies
MIR
$5.28B
| $2.56M | ﹤0.01% |
118,949
+87,579
| +279% | +$1.88M |
|
194
Norfolk Southern
NSC
$62.3B
| $2.55M | ﹤0.01% |
9,961
+7,621
| +326% | +$1.95M |
|
195
UroGen Pharma
URGN
$873M
| $2.53M | ﹤0.01% |
185,030
+184,698
| +55,632% | +$2.53M |
|
196
DexCom
DXCM
$31.6B
| $2.49M | ﹤0.01% |
28,566
-5,247
| -16% | -$458K |
|
197
Solventum
SOLV
$12.6B
| $2.49M | ﹤0.01% |
32,783
+25,237
| +334% | +$1.91M |
|
198
ACM Research
ACMR
$1.76B
| $2.48M | ﹤0.01% |
95,710
-14,418
| -13% | -$373K |
|
199
Kyndryl
KD
$7.57B
| $2.47M | ﹤0.01% |
58,798
-26,215
| -31% | -$1.1M |
|
200
Teck Resources
TECK
$16.8B
| $2.46M | ﹤0.01% |
61,003
-19,302
| -24% | -$779K |
|