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 | +$73.1M | |
| 2 | +$51.8M | |
| 3 | +$46M | |
| 4 |
Meta Platforms (Facebook)
META
|
+$41.8M |
| 5 |
Alibaba
BABA
|
+$37.1M |
Top Sells
| 1 | +$262M | |
| 2 | +$194M | |
| 3 | +$149M | |
| 4 |
Apple
AAPL
|
+$119M |
| 5 |
Amazon
AMZN
|
+$107M |
Sector Composition
| 1 | Technology | 29.59% |
| 2 | Consumer Discretionary | 10.67% |
| 3 | Healthcare | 10.12% |
| 4 | Industrials | 8.86% |
| 5 | Communication Services | 7.94% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
1
Apple
AAPL
$3.67T
| $193M | 5.42% |
708,741
-444,753
|
|
||
2
NVIDIA
NVDA
$4.38T
| $138M | 3.89% |
740,771
-1,408,323
|
|
||
3
Broadcom
AVGO
$1.53T
| $80.4M | 2.26% |
232,173
-49,323
|
|
||
4
Netflix
NFLX
$402B
| $64.8M | 1.82% |
691,029
+678,279
|
|
||
5
State Street SPDR S&P 500 ETF Trust
SPY
$662B
| $59.7M | 1.68% |
87,518
-66,765
|
|
||
6
Western Digital
WDC
$92.3B
| $58.9M | 1.66% |
+341,762
|
|
||
7
Tesla
TSLA
$1.47T
| $54M | 1.52% |
120,091
-13,735
|
|
||
8
Direxion Daily Semiconductor Bull 3X ETF
SOXL
$11.5B
| $52M | 1.46% |
1,236,517
+354,575
|
|
||
9
Novo Nordisk
NVO
$169B
| $51.8M | 1.46% |
1,017,162
+421,560
|
|
||
10
SoFi Technologies
SOFI
$22.6B
| $47.3M | 1.33% |
1,806,402
+198,421
|
|
||
11
iShares Semiconductor ETF
SOXX
$20.7B
| $47M | 1.32% |
+156,093
|
|
||
|
12
Meta Platforms (Facebook)
META
$1.55T
| $41.4M | 1.16% |
+62,668
|
|
||
13
Intel
INTC
$229B
| $39.9M | 1.12% |
1,082,246
-1,747,358
|
|
||
14
Cigna
CI
$70.4B
| $38.5M | 1.08% |
140,025
+6,797
|
|
||
15
Pfizer
PFE
$151B
| $37.1M | 1.04% |
1,491,037
+194,547
|
|
||
16
Microsoft
MSFT
$2.94T
| $34.1M | 0.96% |
70,610
-387,699
|
|
||
17
Palantir
PLTR
$361B
| $34M | 0.96% |
191,290
+128,521
|
|
||
|
18
Alibaba
BABA
$323B
| $33.4M | 0.94% |
228,100
+227,757
|
|
||
19
AST SpaceMobile
ASTS
$25.3B
| $30.7M | 0.86% |
422,850
-64,295
|
|
||
20
UnitedHealth
UNH
$256B
| $30.6M | 0.86% |
92,725
-227,331
|
|
||
21
Freeport-McMoran
FCX
$81B
| $28.7M | 0.81% |
565,970
+118,759
|
|
||
22
VanEck Semiconductor ETF
SMH
$44B
| $28M | 0.79% |
+77,626
|
|
||
23
Rocket Lab Corp
RKLB
$38.8B
| $27.9M | 0.79% |
+400,110
|
|
||
24
Booking.com
BKNG
$134B
| $27.5M | 0.77% |
5,144
-8,408
|
|
||
25
Bloom Energy
BE
$43.3B
| $26.2M | 0.74% |
301,347
+243,304
|
|