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 | |
|---|---|---|---|---|---|---|
76
Costco
COST
$418B
| $8.93M | 0.01% | 15,732 +7,793 | +98% | +$4.42M |
|
77
Marriott International Class A Common Stock
MAR
$72.7B
| $8.88M | 0.01% | 53,716 -12,822 | -19% | -$2.12M |
|
78
Netflix
NFLX
$513B
| $8.84M | 0.01% | 14,671 +14,601 | +20,859% | +$8.8M |
|
79
Fortinet
FTNT
$60.4B
| $8.84M | 0.01% | 24,589 +21,215 | +629% | +$7.62M |
|
80
Qualcomm
QCOM
$173B
| $8.78M | 0.01% | 47,988 -5,086 | -10% | -$930K |
|
81
HubSpot
HUBS
$25.5B
| $8.64M | 0.01% | 13,115 +8,169 | +165% | +$5.38M |
|
82
Procter & Gamble
PG
$368B
| $8.58M | 0.01% | 52,428 -46,926 | -47% | -$7.68M |
|
83
American Airlines Group
AAL
$8.82B
| $8.56M | 0.01% | 476,820 -318,682 | -40% | -$5.72M |
|
84
Peloton Interactive
PTON
$3.1B
| $8.42M | 0.01% | +235,481 | New | +$8.42M |
|
85
Atlassian
TEAM
$46.6B
| $8.37M | 0.01% | 21,953 +1,444 | +7% | +$551K |
|
86
BP
BP
$90.8B
| $8.32M | 0.01% | 312,439 -22,374 | -7% | -$596K |
|
87
United States Oil Fund
USO
$967M
| $8.29M | 0.01% | 152,582 +23,289 | +18% | +$1.27M |
|
88
Broadcom
AVGO
$1.4T
| $8.14M | 0.01% | 12,231 +3,407 | +39% | +$2.27M |
|
89
Okta
OKTA
$16.4B
| $7.98M | 0.01% | 35,588 +10,151 | +40% | +$2.28M |
|
|
CTXS
90
DELISTED
Citrix Systems Inc
CTXS
| $7.74M | 0.01% | 81,775 +77,630 | +1,873% | +$7.34M |
|
91
Coinbase
COIN
$78.2B
| $7.73M | 0.01% | 30,635 -26,737 | -47% | -$6.75M |
|
|
PARA
92
DELISTED
Paramount Global Class B
PARA
| $7.73M | 0.01% | 256,096 +124,181 | +94% | +$3.75M |
|
|
ZEN
93
DELISTED
ZENDESK INC
ZEN
| $7.45M | 0.01% | +71,396 | New | +$7.45M |
|
|
94
Micron Technology
MU
$133B
| $7.39M | 0.01% | 79,305 -303,810 | -79% | -$28.3M |
|
95
Kohl's
KSS
$1.69B
| $7.34M | 0.01% | 148,658 +147,540 | +13,197% | +$7.29M |
|
96
Dick's Sporting Goods
DKS
$17B
| $7.34M | 0.01% | +63,816 | New | +$7.34M |
|
97
Materials Select Sector SPDR Fund
XLB
$5.53B
| $7.33M | 0.01% | +80,903 | New | +$7.33M |
|
98
MongoDB
MDB
$25.7B
| $7.15M | 0.01% | 13,516 +6,242 | +86% | +$3.3M |
|
99
MetLife
MET
$54.1B
| $7.14M | 0.01% | 114,319 +97,694 | +588% | +$6.1M |
|
100
Utilities Select Sector SPDR Fund
XLU
$20.9B
| $7.14M | 0.01% | 99,747 -50,663 | -34% | -$3.63M |
|