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 |
Amazon
AMZN
|
$158M |
| 2 |
Invesco QQQ Trust
QQQ
|
$69.1M |
| 3 |
Meta Platforms (Facebook)
META
|
$57.4M |
| 4 |
Citigroup
C
|
$23.4M |
| 5 |
Goldman Sachs
GS
|
$23M |
Top Sells
| 1 |
Apple
AAPL
|
$49.8M |
| 2 |
Berkshire Hathaway Class B
BRK.B
|
$43.2M |
| 3 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
$42.2M |
| 4 |
Micron Technology
MU
|
$26.1M |
| 5 |
Adobe
ADBE
|
$21M |
Sector Composition
| 1 | Consumer Discretionary | 20.63% |
| 2 | Communication Services | 16.3% |
| 3 | Technology | 12.42% |
| 4 | Industrials | 9.24% |
| 5 | Healthcare | 8.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
101
Zebra Technologies
ZBRA
$15.5B
| $2.98M | 0.01% |
16,857
+12,047
| +250% | +$2.13M |
|
102
Consumer Discretionary Select Sector SPDR Fund
XLY
$23.2B
| $2.97M | 0.01% |
25,340
+9,903
| +64% | +$1.16M |
|
103
Western Digital
WDC
$29.8B
| $2.97M | 0.01% |
50,718
-5,099
| -9% | -$298K |
|
104
Capital One
COF
$142B
| $2.93M | 0.01% |
+30,825
| New | +$2.93M |
|
105
Waste Management
WM
$90.4B
| $2.9M | 0.01% |
+32,075
| New | +$2.9M |
|
106
Comcast
CMCSA
$125B
| $2.88M | 0.01% |
81,452
-182,542
| -69% | -$6.46M |
|
107
Take-Two Interactive
TTWO
$44.1B
| $2.88M | 0.01% |
+20,857
| New | +$2.88M |
|
108
Direxion Daily Gold Miners Index Bear 2X Shares
DUST
$65.2M
| $2.86M | 0.01% |
+72,827
| New | +$2.86M |
|
109
UnitedHealth
UNH
$279B
| $2.84M | 0.01% |
+10,680
| New | +$2.84M |
|
|
BZUN
110
Baozun
BZUN
$233M
| $2.84M | 0.01% |
58,410
+45,035
| +337% | +$2.19M |
|
111
Toronto Dominion Bank
TD
$128B
| $2.78M | 0.01% |
+45,736
| New | +$2.78M |
|
112
RH
RH
$4.14B
| $2.77M | 0.01% |
+21,166
| New | +$2.77M |
|
113
Papa John's
PZZA
$1.58B
| $2.77M | 0.01% |
54,019
+8,205
| +18% | +$421K |
|
|
NBIS
114
Nebius Group N.V. Class A Ordinary Shares
NBIS
$15.7B
| $2.74M | 0.01% |
83,360
-2,483
| -3% | -$81.6K |
|
115
ConocoPhillips
COP
$118B
| $2.73M | 0.01% |
35,220
+26,995
| +328% | +$2.09M |
|
116
Applied Materials
AMAT
$124B
| $2.72M | 0.01% |
70,248
-160,201
| -70% | -$6.19M |
|
117
Devon Energy
DVN
$22.3B
| $2.65M | 0.01% |
66,424
-35,760
| -35% | -$1.43M |
|
118
Nexstar Media Group
NXST
$6.24B
| $2.61M | 0.01% |
32,026
+14,751
| +85% | +$1.2M |
|
|
ETP
119
DELISTED
Energy Transfer Partners, L.P.
ETP
| $2.6M | 0.01% |
116,692
+105,314
| +926% | +$2.34M |
|
|
RDS.B
120
DELISTED
Royal Dutch Shell PLC ADS Class B
RDS.B
| $2.58M | 0.01% |
36,339
+35,072
| +2,768% | +$2.49M |
|
|
ALXN
121
DELISTED
Alexion Pharmaceuticals Inc
ALXN
| $2.52M | 0.01% |
18,136
-6,051
| -25% | -$841K |
|
|
GRUB
122
DELISTED
Just Eat Takeaway.com N.V. American Depositary Shares
GRUB
| $2.5M | 0.01% |
18,017
+5,971
| +50% | +$828K |
|
123
Zillow
Z
$20.2B
| $2.48M | 0.01% |
55,995
+42,570
| +317% | +$1.88M |
|
124
Workday
WDAY
$62.3B
| $2.48M | 0.01% |
16,962
-17,947
| -51% | -$2.62M |
|
125
Mondelez International
MDLZ
$79.3B
| $2.47M | 0.01% |
57,459
+47,219
| +461% | +$2.03M |
|