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 |
Microsoft
MSFT
|
$101M |
| 2 |
NVIDIA
NVDA
|
$66M |
| 3 |
Alphabet (Google) Class A
GOOGL
|
$65M |
| 4 |
Citigroup
C
|
$51.8M |
| 5 |
Berkshire Hathaway Class B
BRK.B
|
$42.7M |
Top Sells
| 1 |
Apple
AAPL
|
$411M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
$64M |
| 3 |
Meta Platforms (Facebook)
META
|
$39.8M |
| 4 |
iShares Core S&P 500 ETF
IVV
|
$34.3M |
| 5 |
PayPal
PYPL
|
$32.9M |
Sector Composition
| 1 | Technology | 17.4% |
| 2 | Financials | 12.04% |
| 3 | Consumer Discretionary | 10.17% |
| 4 | Healthcare | 8.63% |
| 5 | Industrials | 6.03% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
1
Microsoft
MSFT
$3.77T
| $101M | 0.11% | +432,062 | New | +$101M |
|
|
2
NVIDIA
NVDA
$4.24T
| $82.2M | 0.09% | 677,167 +543,401 | +406% | +$66M |
|
|
3
Alphabet (Google) Class A
GOOGL
$2.57T
| $68.6M | 0.08% | 717,124 +679,125 | +1,787% | +$65M |
|
4
iShares 20+ Year Treasury Bond ETF
TLT
$47.8B
| $60.1M | 0.07% | 586,307 -26,539 | -4% | -$2.72M |
|
|
5
Citigroup
C
$178B
| $57.7M | 0.07% | 1,384,414 +1,244,162 | +887% | +$51.8M |
|
6
JPMorgan Chase
JPM
$829B
| $56.2M | 0.06% | 538,019 -62,980 | -10% | -$6.58M |
|
7
Tesla
TSLA
$1.08T
| $51.7M | 0.06% | 194,950 +139,190 | +250% | +$36.9M |
|
|
8
Berkshire Hathaway Class B
BRK.B
$1.09T
| $45.8M | 0.05% | 171,339 +159,961 | +1,406% | +$42.7M |
|
9
SPDR Gold Trust
GLD
$107B
| $44.4M | 0.05% | 287,272 +254,904 | +788% | +$39.4M |
|
10
ProShares UltraPro QQQ
TQQQ
$26B
| $43.9M | 0.05% | 2,274,018 +1,330,372 | +141% | +$25.7M |
|
11
Invesco QQQ Trust
QQQ
$364B
| $42.6M | 0.05% | 159,553 -89,971 | -36% | -$24M |
|
12
iShares China Large-Cap ETF
FXI
$6.65B
| $40.9M | 0.05% | 1,581,551 +267,698 | +20% | +$6.92M |
|
13
Pfizer
PFE
$141B
| $37.4M | 0.04% | +855,584 | New | +$37.4M |
|
14
SPDR S&P Regional Banking ETF
KRE
$3.99B
| $31M | 0.04% | 526,601 +482,899 | +1,105% | +$28.4M |
|
15
KraneShares CSI China Internet ETF
KWEB
$8.49B
| $29.1M | 0.03% | 1,182,799 +854,950 | +261% | +$21.1M |
|
16
Amazon
AMZN
$2.44T
| $27M | 0.03% | 238,592 -49,415 | -17% | -$5.58M |
|
17
Union Pacific
UNP
$133B
| $24.8M | 0.03% | 127,150 +77,146 | +154% | +$15M |
|
18
VanEck Gold Miners ETF
GDX
$19B
| $24.7M | 0.03% | 1,023,577 +470,563 | +85% | +$11.3M |
|
|
19
Alphabet (Google) Class C
GOOG
$2.58T
| $24.1M | 0.03% | 250,975 +223,798 | +823% | +$21.5M |
|
20
Texas Instruments
TXN
$184B
| $23.8M | 0.03% | +153,940 | New | +$23.8M |
|
|
B
21
Barrick Mining Corporation
B
$45.4B
| $23.5M | 0.03% | 1,518,803 +871,670 | +135% | +$13.5M |
|
22
Financial Select Sector SPDR Fund
XLF
$54.1B
| $20.9M | 0.02% | 688,487 +31,569 | +5% | +$958K |
|
23
Valero Energy
VLO
$47.2B
| $17.7M | 0.02% | 165,753 +39,910 | +32% | +$4.26M |
|
24
Blackstone
BX
$134B
| $17.5M | 0.02% | +209,199 | New | +$17.5M |
|
|
PARA
25
DELISTED
Paramount Global Class B
PARA
| $17.5M | 0.02% | 917,452 +29,317 | +3% | +$558K |
|