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 |
Financial Select Sector SPDR Fund
XLF
|
$42.3M |
| 2 |
Shopify
SHOP
|
$37.4M |
| 3 |
Verizon
VZ
|
$34M |
| 4 |
iShares China Large-Cap ETF
FXI
|
$33M |
| 5 |
Merck
MRK
|
$28M |
Top Sells
| 1 |
AMC Entertainment Holdings
AMC
|
$38.3M |
| 2 |
Carnival Corp
CCL
|
$37.6M |
| 3 |
GE Aerospace
GE
|
$33M |
| 4 |
Advanced Micro Devices
AMD
|
$30.6M |
| 5 |
Micron Technology
MU
|
$28.3M |
Sector Composition
| 1 | Technology | 20.53% |
| 2 | Consumer Discretionary | 13.81% |
| 3 | Healthcare | 11.39% |
| 4 | Communication Services | 7.32% |
| 5 | Industrials | 6.51% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1
Direxion Daily S&P 500 Bull 3x Shares
SPXL
$5.45B
| $49.7M | 0.05% | 346,519 +109,493 | +46% | +$15.7M |
|
2
TSMC
TSM
$1.2T
| $45.3M | 0.05% | 376,467 +151,651 | +67% | +$18.2M |
|
|
3
Shopify
SHOP
$184B
| $43.7M | 0.04% | 31,759 +27,127 | +586% | +$37.4M |
|
|
4
Financial Select Sector SPDR Fund
XLF
$54.1B
| $42.8M | 0.04% | 1,094,875 +1,083,712 | +9,708% | +$42.3M |
|
|
5
Verizon
VZ
$186B
| $42.2M | 0.04% | 812,399 +653,849 | +412% | +$34M |
|
6
NIO
NIO
$14.3B
| $39.2M | 0.04% | 1,235,848 +877,917 | +245% | +$27.8M |
|
|
7
iShares China Large-Cap ETF
FXI
$6.65B
| $33M | 0.03% | +902,666 | New | +$33M |
|
|
8
Merck
MRK
$210B
| $30.9M | 0.03% | 403,118 +364,902 | +955% | +$28M |
|
9
KraneShares CSI China Internet ETF
KWEB
$8.49B
| $28.5M | 0.03% | 780,883 +740,902 | +1,853% | +$27M |
|
10
Ford
F
$46.8B
| $28.4M | 0.03% | 1,367,974 +1,060,211 | +344% | +$22M |
|
11
Salesforce
CRM
$245B
| $24.9M | 0.03% | 97,902 +97,852 | +195,704% | +$24.9M |
|
12
Medtronic
MDT
$119B
| $24.7M | 0.02% | +238,800 | New | +$24.7M |
|
13
Delta Air Lines
DAL
$40.3B
| $24M | 0.02% | 613,894 +330,028 | +116% | +$12.9M |
|
14
UnitedHealth
UNH
$281B
| $23.9M | 0.02% | +47,558 | New | +$23.9M |
|
15
Lam Research
LRCX
$127B
| $23.7M | 0.02% | 32,899 +25,240 | +330% | +$18.2M |
|
16
Affirm
AFRM
$28.8B
| $23.3M | 0.02% | +231,237 | New | +$23.3M |
|
17
Occidental Petroleum
OXY
$46.9B
| $22.9M | 0.02% | 788,893 +778,627 | +7,585% | +$22.6M |
|
18
Vanguard S&P 500 ETF
VOO
$726B
| $22.3M | 0.02% | +51,055 | New | +$22.3M |
|
|
XLNX
19
DELISTED
Xilinx Inc
XLNX
| $22.3M | 0.02% | 105,078 +104,544 | +19,578% | +$22.2M |
|
20
ARK Innovation ETF
ARKK
$7.45B
| $21.7M | 0.02% | 229,004 +223,493 | +4,055% | +$21.1M |
|
21
Caesars Entertainment
CZR
$5.57B
| $21.4M | 0.02% | 228,901 +172,257 | +304% | +$16.1M |
|
22
SoFi Technologies
SOFI
$30.6B
| $21M | 0.02% | 1,328,904 +956,226 | +257% | +$15.1M |
|
23
Trade Desk
TTD
$26.7B
| $20.6M | 0.02% | 224,400 +1,018 | +0.5% | +$93.3K |
|
24
Vale
VALE
$43.9B
| $20.3M | 0.02% | +1,451,403 | New | +$20.3M |
|
25
Palantir
PLTR
$372B
| $20M | 0.02% | 1,100,603 -202,849 | -16% | -$3.69M |
|