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 |
Advanced Micro Devices
AMD
|
$17.7M |
| 2 |
NVIDIA
NVDA
|
$11.3M |
| 3 |
iShares MSCI EAFE ETF
EFA
|
$10.1M |
| 4 |
NIO
NIO
|
$7.66M |
| 5 |
Alibaba
BABA
|
$7.54M |
Top Sells
| 1 |
SPDR Gold Trust
GLD
|
$15.2M |
| 2 |
Amazon
AMZN
|
$9.5M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
$8.76M |
| 4 |
Technology Select Sector SPDR Fund
XLK
|
$7.41M |
| 5 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
$5.3M |
Sector Composition
| 1 | Technology | 18.66% |
| 2 | Consumer Discretionary | 14.99% |
| 3 | Communication Services | 10.06% |
| 4 | Healthcare | 9.68% |
| 5 | Financials | 9.59% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
51
Marriott International Class A Common Stock
MAR
$72.7B
| $9.26M | 0.01% | 66,538 +2,156 | +3% | +$300K |
|
52
BP
BP
$90.8B
| $9.07M | 0.01% | 334,813 +8,098 | +2% | +$219K |
|
53
American Tower
AMT
$95.5B
| $8.96M | 0.01% | 33,159 +244 | +0.7% | +$66K |
|
54
Cleveland-Cliffs
CLF
$5.32B
| $8.96M | 0.01% | 406,096 +2,199 | +0.5% | +$48.5K |
|
55
Verizon
VZ
$186B
| $8.92M | 0.01% | 158,550 -15,763 | -9% | -$887K |
|
56
Expedia Group
EXPE
$26.6B
| $8.86M | 0.01% | 53,062 +12,397 | +30% | +$2.07M |
|
57
Morgan Stanley
MS
$240B
| $8.83M | 0.01% | 95,934 +13,746 | +17% | +$1.26M |
|
58
DraftKings
DKNG
$23.8B
| $8.8M | 0.01% | 169,859 +34,183 | +25% | +$1.77M |
|
59
Fastly
FSLY
$1.12B
| $8.6M | 0.01% | 148,166 -6,050 | -4% | -$351K |
|
60
TAL Education Group
TAL
$6.46B
| $8.34M | 0.01% | 356,582 -2,912 | -0.8% | -$68.1K |
|
61
iShares US Real Estate ETF
IYR
$3.76B
| $8.29M | 0.01% | 81,007 -300 | -0.4% | -$30.7K |
|
62
Datadog
DDOG
$47.7B
| $8.15M | 0.01% | 77,946 -65 | -0.1% | -$6.8K |
|
63
SPDR S&P Oil & Gas Exploration & Production ETF
XOP
$1.9B
| $8.13M | 0.01% | 82,177 +880 | +1% | +$87.1K |
|
64
Visa
V
$683B
| $8.06M | 0.01% | 34,291 +5,276 | +18% | +$1.24M |
|
|
WBA
65
DELISTED
Walgreens Boots Alliance
WBA
| $7.95M | 0.01% | 163,260 +45,920 | +39% | +$2.24M |
|
66
Simon Property Group
SPG
$59B
| $7.81M | 0.01% | 59,340 -1,014 | -2% | -$133K |
|
67
Altria Group
MO
$113B
| $7.76M | 0.01% | 162,316 +3,119 | +2% | +$149K |
|
68
Workday
WDAY
$61.6B
| $7.71M | 0.01% | 32,745 +3,544 | +12% | +$835K |
|
69
BlackBerry
BB
$2.28B
| $7.67M | 0.01% | 630,547 -18,735 | -3% | -$228K |
|
70
Gilead Sciences
GILD
$140B
| $7.64M | 0.01% | 110,542 +23,394 | +27% | +$1.62M |
|
71
Aon
AON
$79.1B
| $7.62M | 0.01% | 31,923 | – | – |
|
72
Roblox
RBLX
$86.4B
| $7.53M | 0.01% | 87,775 -48,867 | -36% | -$4.19M |
|
73
Abits Group
ABTS
$8.91M
| $7.53M | 0.01% | 338,761 +1,248 | +0.4% | +$27.7K |
|
74
JD.com
JD
$44.1B
| $7.51M | 0.01% | 97,021 +51,519 | +113% | +$3.99M |
|
75
Qualcomm
QCOM
$173B
| $7.47M | 0.01% | 53,074 +8,528 | +19% | +$1.2M |
|