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 |
iShares 20+ Year Treasury Bond ETF
TLT
|
$278M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
$84.4M |
| 3 |
NVIDIA
NVDA
|
$76.9M |
| 4 |
TSMC
TSM
|
$74.9M |
| 5 |
Amazon
AMZN
|
$53.5M |
Top Sells
| 1 |
Apple
AAPL
|
$497M |
| 2 |
Strategy Inc Common Stock Class A
MSTR
|
$73.7M |
| 3 |
Alibaba
BABA
|
$49M |
| 4 |
Advanced Micro Devices
AMD
|
$48.1M |
| 5 |
Uber
UBER
|
$41.8M |
Sector Composition
| 1 | Technology | 22.9% |
| 2 | Consumer Discretionary | 12.26% |
| 3 | Healthcare | 9.52% |
| 4 | Communication Services | 8.42% |
| 5 | Financials | 7.07% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
1
iShares 20+ Year Treasury Bond ETF
TLT
$47.8B
| $278M | 0.18% | +3,057,978 | New | +$278M |
|
|
2
NVIDIA
NVDA
$4.24T
| $121M | 0.08% | 1,113,380 +709,408 | +176% | +$76.9M |
|
|
3
Alphabet (Google) Class A
GOOGL
$2.57T
| $84.4M | 0.05% | +545,647 | New | +$84.4M |
|
|
4
TSMC
TSM
$1.2T
| $79.8M | 0.05% | 480,522 +451,305 | +1,545% | +$74.9M |
|
5
Intel
INTC
$107B
| $76.8M | 0.05% | 3,380,296 -190,644 | -5% | -$4.33M |
|
6
Micron Technology
MU
$133B
| $56.8M | 0.04% | 653,938 +613,262 | +1,508% | +$53.3M |
|
|
7
Apple
AAPL
$3.45T
| $55.3M | 0.04% | 248,768 -2,235,748 | -90% | -$497M |
|
|
8
Amazon
AMZN
$2.44T
| $53.5M | 0.03% | +281,158 | New | +$53.5M |
|
9
Pfizer
PFE
$141B
| $41M | 0.03% | 1,616,802 +50,149 | +3% | +$1.27M |
|
10
Citigroup
C
$178B
| $36.8M | 0.02% | 519,037 -168,447 | -25% | -$12M |
|
11
Nike
NKE
$114B
| $34.1M | 0.02% | 537,279 -53,645 | -9% | -$3.41M |
|
12
Netflix
NFLX
$513B
| $32.8M | 0.02% | +35,144 | New | +$32.8M |
|
13
Tesla
TSLA
$1.08T
| $30.4M | 0.02% | 117,279 +107,115 | +1,054% | +$27.8M |
|
14
Baidu
BIDU
$32.8B
| $30.3M | 0.02% | 328,925 +65,746 | +25% | +$6.05M |
|
15
Constellation Energy
CEG
$96.2B
| $27.2M | 0.02% | 135,142 +75,144 | +125% | +$15.2M |
|
16
Arm
ARM
$147B
| $27M | 0.02% | 252,824 +67,022 | +36% | +$7.16M |
|
17
Cigna
CI
$80.3B
| $25.8M | 0.02% | 78,302 -8,753 | -10% | -$2.88M |
|
|
B
18
Barrick Mining Corporation
B
$45.4B
| $24M | 0.02% | 1,235,654 -582,333 | -32% | -$11.3M |
|
19
iShares Bitcoin Trust
IBIT
$80.7B
| $23.5M | 0.02% | +503,019 | New | +$23.5M |
|
20
Dell
DELL
$82.6B
| $23.1M | 0.01% | 253,933 +151,761 | +149% | +$13.8M |
|
21
KraneShares CSI China Internet ETF
KWEB
$8.49B
| $22.7M | 0.01% | 650,233 +647,364 | +22,564% | +$22.6M |
|
22
CVS Health
CVS
$92.8B
| $22.5M | 0.01% | 332,331 -125,135 | -27% | -$8.48M |
|
23
ProShares Short QQQ
PSQ
$513M
| $20.1M | 0.01% | 495,320 +39,852 | +9% | +$1.62M |
|
24
Energy Transfer Partners
ET
$60.8B
| $19.6M | 0.01% | 1,055,768 -122,901 | -10% | -$2.28M |
|
25
SPDR S&P Biotech ETF
XBI
$5.07B
| $19.5M | 0.01% | 241,039 -61,655 | -20% | -$5M |
|