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 | |
|---|---|---|---|---|---|---|
51
Mercado Libre
MELI
$125B
| $12.5M | 0.01% | 9,299 +5,021 | +117% | +$6.77M |
|
52
ServiceNow
NOW
$190B
| $12.2M | 0.01% | 18,800 +18,665 | +13,826% | +$12.1M |
|
53
Plug Power
PLUG
$1.81B
| $12M | 0.01% | 423,802 -77,115 | -15% | -$2.18M |
|
54
Pinterest
PINS
$24.9B
| $11.8M | 0.01% | +323,852 | New | +$11.8M |
|
55
ProShares UltraPro S&P 500
UPRO
$4.46B
| $11.3M | 0.01% | 74,351 +66,862 | +893% | +$10.2M |
|
56
Cleveland-Cliffs
CLF
$5.32B
| $11.1M | 0.01% | 509,756 +103,660 | +26% | +$2.26M |
|
57
Li Auto
LI
$23.7B
| $10.5M | 0.01% | 328,076 +322,238 | +5,520% | +$10.3M |
|
58
Intuitive Surgical
ISRG
$170B
| $10.4M | 0.01% | 28,996 -2,848 | -9% | -$1.02M |
|
59
SPDR Gold Trust
GLD
$107B
| $10.4M | 0.01% | 60,891 +53,344 | +707% | +$9.12M |
|
|
XYZ
60
Block, Inc.
XYZ
$48.5B
| $10.4M | 0.01% | 64,379 +64,279 | +64,279% | +$10.4M |
|
61
Lockheed Martin
LMT
$106B
| $10.4M | 0.01% | +29,159 | New | +$10.4M |
|
62
Novartis
NVS
$245B
| $10.3M | 0.01% | 117,859 +113,384 | +2,534% | +$9.92M |
|
63
Bristol-Myers Squibb
BMY
$96B
| $10.2M | 0.01% | 163,114 +65,017 | +66% | +$4.05M |
|
64
IBM
IBM
$227B
| $10.1M | 0.01% | 75,206 +33,927 | +82% | +$4.53M |
|
65
Electronic Arts
EA
$43B
| $10M | 0.01% | 76,070 +62,171 | +447% | +$8.2M |
|
66
Technology Select Sector SPDR Fund
XLK
$83.9B
| $10M | 0.01% | 57,650 -44,661 | -44% | -$7.76M |
|
67
Palo Alto Networks
PANW
$127B
| $9.86M | 0.01% | 17,714 +14,648 | +478% | +$8.16M |
|
68
MGM Resorts International
MGM
$10.8B
| $9.79M | 0.01% | +218,136 | New | +$9.79M |
|
69
Dollar General
DG
$23.9B
| $9.62M | 0.01% | 40,784 +32,517 | +393% | +$7.67M |
|
70
Newmont
NEM
$81.7B
| $9.55M | 0.01% | 153,998 +52,776 | +52% | +$3.27M |
|
71
Generac Holdings
GNRC
$10.9B
| $9.4M | 0.01% | 26,704 +4,133 | +18% | +$1.45M |
|
|
X
72
DELISTED
US Steel
X
| $9.21M | 0.01% | 386,986 -414,503 | -52% | -$9.87M |
|
73
Energy Select Sector SPDR Fund
XLE
$27.6B
| $9.08M | 0.01% | 163,629 +91,174 | +126% | +$5.06M |
|
74
VanEck Oil Services ETF
OIH
$886M
| $9.04M | 0.01% | 48,886 -986 | -2% | -$182K |
|
|
ATVI
75
DELISTED
Activision Blizzard Inc.
ATVI
| $8.97M | 0.01% | 134,793 +61,349 | +84% | +$4.08M |
|