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 |
Apple
AAPL
|
$35.2M |
| 2 |
Micron Technology
MU
|
$32.9M |
| 3 |
Berkshire Hathaway Class B
BRK.B
|
$29.5M |
| 4 |
NVIDIA
NVDA
|
$22.9M |
| 5 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
$22M |
Top Sells
| 1 |
TWX
Time Warner Inc
TWX
|
$34.8M |
| 2 |
Amazon
AMZN
|
$33.4M |
| 3 |
Tesla
TSLA
|
$19.8M |
| 4 |
Netflix
NFLX
|
$17.7M |
| 5 |
TWTR
Twitter, Inc.
TWTR
|
$13.5M |
Sector Composition
| 1 | Technology | 20.43% |
| 2 | Consumer Discretionary | 15.24% |
| 3 | Communication Services | 12% |
| 4 | Financials | 10.18% |
| 5 | Industrials | 9.87% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
101
AutoZone
AZO
$70.1B
| $2.84M | 0.01% |
+4,226
| New | +$2.84M |
|
102
TAL Education Group
TAL
$6.34B
| $2.83M | 0.01% |
+76,937
| New | +$2.83M |
|
|
WP
103
DELISTED
Worldpay, Inc.
WP
| $2.81M | 0.01% |
+34,323
| New | +$2.81M |
|
104
Skyworks Solutions
SWKS
$10.9B
| $2.78M | 0.01% |
28,757
+27,223
| +1,775% | +$2.63M |
|
105
Universal Display
OLED
$6.61B
| $2.74M | 0.01% |
31,878
+5,339
| +20% | +$459K |
|
106
VanEck Gold Miners ETF
GDX
$19.6B
| $2.73M | 0.01% |
122,539
+90,534
| +283% | +$2.02M |
|
|
TSRO
107
DELISTED
TESARO, Inc.
TSRO
| $2.72M | 0.01% |
61,221
+58,761
| +2,389% | +$2.61M |
|
108
Kraft Heinz
KHC
$31.9B
| $2.71M | 0.01% |
+43,153
| New | +$2.71M |
|
109
Etsy
ETSY
$5.15B
| $2.7M | 0.01% |
64,043
+42,339
| +195% | +$1.79M |
|
110
Radware
RDWR
$1.06B
| $2.68M | 0.01% |
106,210
+104,125
| +4,994% | +$2.63M |
|
111
Halliburton
HAL
$18.4B
| $2.65M | 0.01% |
58,717
+50,571
| +621% | +$2.28M |
|
112
Martin Marietta Materials
MLM
$36.9B
| $2.64M | 0.01% |
11,835
+10,338
| +691% | +$2.31M |
|
113
SPDR S&P Regional Banking ETF
KRE
$3.97B
| $2.6M | 0.01% |
42,598
+25,648
| +151% | +$1.56M |
|
114
Charles Schwab
SCHW
$175B
| $2.59M | 0.01% |
+50,689
| New | +$2.59M |
|
115
Light & Wonder
LNW
$7.16B
| $2.59M | 0.01% |
52,637
+52,437
| +26,219% | +$2.58M |
|
116
TransDigm Group
TDG
$72B
| $2.57M | 0.01% |
7,438
+2,935
| +65% | +$1.01M |
|
|
ATHN
117
DELISTED
Athenahealth, Inc.
ATHN
| $2.56M | 0.01% |
16,104
+13,721
| +576% | +$2.18M |
|
118
Regions Financial
RF
$24B
| $2.56M | 0.01% |
+144,135
| New | +$2.56M |
|
119
D.R. Horton
DHI
$51.3B
| $2.55M | 0.01% |
62,262
+44,113
| +243% | +$1.81M |
|
120
Carnival Corp
CCL
$42.5B
| $2.55M | 0.01% |
+44,472
| New | +$2.55M |
|
121
Check Point Software Technologies
CHKP
$20.6B
| $2.51M | 0.01% |
25,688
+20,069
| +357% | +$1.96M |
|
122
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
$304M
| $2.51M | 0.01% |
69,720
-1,178
| -2% | -$42.3K |
|
123
Chipotle Mexican Grill
CMG
$56B
| $2.47M | 0.01% |
5,717
+2,651
| +86% | +$1.14M |
|
124
Lennar Class A
LEN
$34.7B
| $2.46M | 0.01% |
46,840
+5,620
| +14% | +$295K |
|
|
MOMO
125
Hello Group
MOMO
$1.33B
| $2.44M | 0.01% |
+56,134
| New | +$2.44M |
|