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 |
AMC Entertainment Holdings
AMC
|
$84.2M |
| 2 |
NVIDIA
NVDA
|
$35.3M |
| 3 |
AT&T
T
|
$28.5M |
| 4 |
Micron Technology
MU
|
$23.1M |
| 5 |
Baidu
BIDU
|
$22.7M |
Top Sells
| 1 |
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
|
$38.7M |
| 2 |
Palantir
PLTR
|
$29.3M |
| 3 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
$26.2M |
| 4 |
PARA
Paramount Global Class B
PARA
|
$21.7M |
| 5 |
Exxon Mobil
XOM
|
$18M |
Sector Composition
| 1 | Technology | 17.69% |
| 2 | Consumer Discretionary | 14.79% |
| 3 | Communication Services | 10.15% |
| 4 | Healthcare | 9.69% |
| 5 | Financials | 9.42% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
101
Marathon Petroleum
MPC
$54.6B
| $6.15M | 0.01% | +101,833 | New | +$6.15M |
|
102
Gilead Sciences
GILD
$140B
| $6M | 0.01% | 87,148 -53,052 | -38% | -$3.65M |
|
103
iQIYI
IQ
$2.55B
| $5.94M | 0.01% | 381,006 +280,267 | +278% | +$4.37M |
|
104
Okta
OKTA
$16.4B
| $5.86M | 0.01% | 23,933 +2,286 | +11% | +$559K |
|
105
Spirit AeroSystems
SPR
$4.88B
| $5.82M | 0.01% | 123,338 +84,215 | +215% | +$3.97M |
|
106
Caterpillar
CAT
$196B
| $5.82M | 0.01% | +26,735 | New | +$5.82M |
|
107
QuantumScape
QS
$4.49B
| $5.79M | 0.01% | 197,994 +192,644 | +3,601% | +$5.64M |
|
108
Fiverr
FVRR
$870M
| $5.76M | 0.01% | 23,751 -7,777 | -25% | -$1.89M |
|
109
NRG Energy
NRG
$28.2B
| $5.63M | 0.01% | +139,601 | New | +$5.63M |
|
110
Atlassian
TEAM
$46.6B
| $5.58M | 0.01% | 21,709 +8,541 | +65% | +$2.19M |
|
111
Editas Medicine
EDIT
$231M
| $5.41M | 0.01% | 95,453 +16,805 | +21% | +$952K |
|
112
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
$17.8B
| $5.4M | 0.01% | +61,307 | New | +$5.4M |
|
113
Lam Research
LRCX
$127B
| $5.37M | 0.01% | 8,259 -25,088 | -75% | -$16.3M |
|
114
GE Aerospace
GE
$292B
| $5.36M | 0.01% | 398,115 -321,810 | -45% | -$4.33M |
|
|
PARA
115
DELISTED
Paramount Global Class B
PARA
| $5.29M | 0.01% | 116,984 -480,842 | -80% | -$21.7M |
|
116
Ford
F
$46.8B
| $5.25M | 0.01% | 353,138 -197,166 | -36% | -$2.93M |
|
117
Zscaler
ZS
$43.1B
| $5.24M | 0.01% | 24,246 -4,780 | -16% | -$1.03M |
|
118
FedEx
FDX
$54.5B
| $5.23M | 0.01% | 17,521 +10,341 | +144% | +$3.09M |
|
119
ASML
ASML
$292B
| $5.19M | 0.01% | 7,509 -2,104 | -22% | -$1.45M |
|
|
WORK
120
DELISTED
Slack Technologies, Inc.
WORK
| $5.15M | 0.01% | 116,357 -51,602 | -31% | -$2.29M |
|
121
GameStop
GME
$10B
| $5.15M | 0.01% | 24,056 +23,706 | +6,773% | +$5.08M |
|
122
Global X Lithium & Battery Tech ETF
LIT
$1.08B
| $5.12M | ﹤0.01% | 70,706 +59,720 | +544% | +$4.33M |
|
|
GAP
123
The Gap, Inc.
GAP
$8.21B
| $5.12M | ﹤0.01% | 152,137 +1,707 | +1% | +$57.4K |
|
|
FTCH
124
DELISTED
Farfetch Limited Class A Ordinary Shares
FTCH
| $5.01M | ﹤0.01% | 99,397 -5,713 | -5% | -$288K |
|
125
International Paper
IP
$26.2B
| $5M | ﹤0.01% | +81,543 | New | +$5M |
|