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 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
$32.1M |
| 2 |
PARA
Paramount Global Class B
PARA
|
$23.3M |
| 3 |
Pinduoduo
PDD
|
$17.3M |
| 4 |
Pfizer
PFE
|
$16.8M |
| 5 |
American Airlines Group
AAL
|
$14.5M |
Top Sells
| 1 |
Amazon
AMZN
|
$64.4M |
| 2 |
Alphabet (Google) Class C
GOOG
|
$38.1M |
| 3 |
AutoZone
AZO
|
$32.2M |
| 4 |
SPDR S&P 500 ETF Trust
SPY
|
$25.3M |
| 5 |
Apple
AAPL
|
$22.5M |
Sector Composition
| 1 | Technology | 20.25% |
| 2 | Consumer Discretionary | 15.22% |
| 3 | Healthcare | 10.03% |
| 4 | Financials | 9.2% |
| 5 | Industrials | 9.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
101
Under Armour Class C
UA
$2.11B
| $3.7M | 0.01% | 200,281 +199,012 | +15,683% | +$3.67M |
|
102
Dollar Tree
DLTR
$22.8B
| $3.7M | 0.01% | +32,290 | New | +$3.7M |
|
103
lululemon athletica
LULU
$24.2B
| $3.64M | 0.01% | 11,868 -22,100 | -65% | -$6.78M |
|
104
NetEase
NTES
$86.2B
| $3.62M | 0.01% | 35,050 +16,876 | +93% | +$1.74M |
|
105
Medtronic
MDT
$119B
| $3.55M | 0.01% | 30,086 -55,765 | -65% | -$6.59M |
|
106
fuboTV
FUBO
$1.21B
| $3.53M | 0.01% | 159,685 +62,992 | +65% | +$1.39M |
|
107
iShares MSCI South Korea ETF
EWY
$5.13B
| $3.5M | 0.01% | 39,000 +19,908 | +104% | +$1.79M |
|
|
NNDM
108
Nano Dimension
NNDM
$300M
| $3.5M | 0.01% | 407,112 +84,946 | +26% | +$730K |
|
109
US Global Jets ETF
JETS
$845M
| $3.48M | 0.01% | 129,221 -55,992 | -30% | -$1.51M |
|
110
Tyson Foods
TSN
$20.2B
| $3.43M | 0.01% | 46,178 +26,750 | +138% | +$1.99M |
|
|
MNDT
111
DELISTED
Mandiant, Inc. Common Stock
MNDT
| $3.42M | 0.01% | 174,817 +85,298 | +95% | +$1.67M |
|
112
Lincoln National
LNC
$8.14B
| $3.41M | 0.01% | 54,814 -17,179 | -24% | -$1.07M |
|
113
TransDigm Group
TDG
$78.8B
| $3.36M | 0.01% | 5,710 +5,083 | +811% | +$2.99M |
|
114
Occidental Petroleum
OXY
$46.9B
| $3.35M | 0.01% | 125,845 -51,055 | -29% | -$1.36M |
|
115
Aptiv
APTV
$17.3B
| $3.27M | 0.01% | +23,741 | New | +$3.27M |
|
116
Direxion Daily Financial Bull 3x Shares
FAS
$2.74B
| $3.27M | 0.01% | 35,969 +8,625 | +32% | +$784K |
|
117
Phillips 66
PSX
$54B
| $3.26M | 0.01% | 39,957 +34,174 | +591% | +$2.79M |
|
118
SPDR Gold Trust
GLD
$107B
| $3.25M | 0.01% | 20,305 -3,650 | -15% | -$584K |
|
|
KL
119
DELISTED
Kirkland Lake Gold Ltd Ordinary
KL
| $3.24M | 0.01% | 95,877 +38,171 | +66% | +$1.29M |
|
120
Credit Acceptance
CACC
$5.78B
| $3.21M | 0.01% | 8,924 +7,374 | +476% | +$2.66M |
|
|
IPOF
121
DELISTED
Social Capital Hedosophia Holdings Corp. VI
IPOF
| $3.2M | 0.01% | 299,051 +148,863 | +99% | +$1.59M |
|
122
VF Corp
VFC
$5.91B
| $3.18M | 0.01% | 39,769 +2,086 | +6% | +$167K |
|
123
AdvisorShares Pure US Cannabis ETF
MSOS
$986M
| $3.17M | 0.01% | 74,876 +62,622 | +511% | +$2.65M |
|
124
Spotify
SPOT
$140B
| $3.17M | 0.01% | 11,846 +11,805 | +28,793% | +$3.16M |
|
125
Western Digital
WDC
$27.9B
| $3.17M | 0.01% | 47,543 -17,107 | -26% | -$1.14M |
|