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 | |
|---|---|---|---|---|---|---|
|
1
NVIDIA
NVDA
$4.24T
| $392M | 0.22% | 2,481,314 +1,367,934 | +123% | +$216M |
|
|
2
Apple
AAPL
$3.45T
| $210M | 0.12% | 1,021,727 +772,959 | +311% | +$159M |
|
|
3
Broadcom
AVGO
$1.4T
| $152M | 0.09% | 551,694 +464,849 | +535% | +$128M |
|
|
4
iShares 20+ Year Treasury Bond ETF
TLT
$47.8B
| $129M | 0.07% | 1,457,996 -1,599,982 | -52% | -$141M |
|
5
Alphabet (Google) Class A
GOOGL
$2.57T
| $126M | 0.07% | 714,528 +168,881 | +31% | +$29.8M |
|
|
6
Booking.com
BKNG
$181B
| $78.5M | 0.05% | 13,563 +10,736 | +380% | +$62.2M |
|
7
Micron Technology
MU
$133B
| $75.9M | 0.04% | 616,179 -37,759 | -6% | -$4.65M |
|
|
8
Alphabet (Google) Class C
GOOG
$2.58T
| $63.5M | 0.04% | 357,870 +283,043 | +378% | +$50.2M |
|
|
9
TSMC
TSM
$1.2T
| $63.2M | 0.04% | 278,926 -201,596 | -42% | -$45.7M |
|
|
10
SPDR S&P 500 ETF Trust
SPY
$658B
| $61.9M | 0.04% | +100,129 | New | +$61.9M |
|
11
Meta Platforms (Facebook)
META
$1.86T
| $58.7M | 0.03% | +79,568 | New | +$58.7M |
|
12
UnitedHealth
UNH
$281B
| $56.2M | 0.03% | 180,167 +144,106 | +400% | +$45M |
|
13
Intel
INTC
$107B
| $54.7M | 0.03% | 2,441,452 -938,844 | -28% | -$21M |
|
14
Advanced Micro Devices
AMD
$264B
| $48.5M | 0.03% | +342,008 | New | +$48.5M |
|
15
Health Care Select Sector SPDR Fund
XLV
$33.9B
| $45M | 0.03% | 333,580 +306,130 | +1,115% | +$41.3M |
|
16
iShares Russell 2000 ETF
IWM
$67B
| $41.6M | 0.02% | +192,597 | New | +$41.6M |
|
17
Nike
NKE
$114B
| $37.1M | 0.02% | 522,792 -14,487 | -3% | -$1.03M |
|
18
Alibaba
BABA
$322B
| $35.7M | 0.02% | +314,372 | New | +$35.7M |
|
19
Robinhood
HOOD
$92.4B
| $28.2M | 0.02% | 301,109 +201,736 | +203% | +$18.9M |
|
20
iShares MSCI Brazil ETF
EWZ
$5.45B
| $27.6M | 0.02% | 955,457 +869,110 | +1,007% | +$25.1M |
|
21
SPDR Gold Trust
GLD
$107B
| $26.2M | 0.02% | +85,931 | New | +$26.2M |
|
22
Cigna
CI
$80.3B
| $25.4M | 0.01% | 76,861 -1,441 | -2% | -$476K |
|
23
SoFi Technologies
SOFI
$30.6B
| $25.1M | 0.01% | 1,380,363 +305,953 | +28% | +$5.57M |
|
24
Financial Select Sector SPDR Fund
XLF
$54.1B
| $23.7M | 0.01% | +453,315 | New | +$23.7M |
|
25
KraneShares CSI China Internet ETF
KWEB
$8.49B
| $22.2M | 0.01% | 645,901 -4,332 | -0.7% | -$149K |
|