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 | |
|---|---|---|---|---|---|---|
|
EGC
1126
DELISTED
Energy XXI Gulf Coast, Inc. Common Stock
EGC
| $75K | ﹤0.01% |
+8,520
| New | +$75K |
|
1127
Cboe Global Markets
CBOE
$24.5B
| $74K | ﹤0.01% |
+715
| New | +$74K |
|
1128
Vera Bradley
VRA
$63.7M
| $74K | ﹤0.01% |
+5,328
| New | +$74K |
|
1129
Global Industrial
GIC
$1.44B
| $73K | ﹤0.01% |
2,133
+980
| +85% | +$33.5K |
|
1130
Liberty Broadband Class C
LBRDK
$8.67B
| $73K | ﹤0.01% |
967
+467
| +93% | +$35.3K |
|
1131
Standard Motor Products
SMP
$874M
| $73K | ﹤0.01% |
+1,527
| New | +$73K |
|
|
AIFU
1132
AIFU Inc. Class A Ordinary Share
AIFU
$83.4M
| $73K | ﹤0.01% |
130
-98
| -43% | -$55K |
|
|
VCRA
1133
DELISTED
VOCERA COMMUNICATIONS, INC.
VCRA
| $73K | ﹤0.01% |
2,455
+2,303
| +1,515% | +$68.5K |
|
|
VLP
1134
DELISTED
Valero Energy Partners LP
VLP
| $72K | ﹤0.01% |
1,896
+1,089
| +135% | +$41.4K |
|
1135
AXT Inc
AXTI
$155M
| $71K | ﹤0.01% |
10,177
+2,631
| +35% | +$18.4K |
|
1136
Forrester Research
FORR
$188M
| $71K | ﹤0.01% |
+1,707
| New | +$71K |
|
1137
Telefonica
TEF
$29.9B
| $71K | ﹤0.01% |
10,324
+6,096
| +144% | +$41.9K |
|
|
GHDX
1138
DELISTED
Genomic Health, Inc.
GHDX
| $71K | ﹤0.01% |
1,415
-2,824
| -67% | -$142K |
|
1139
Innoviva
INVA
$1.25B
| $70K | ﹤0.01% |
+5,141
| New | +$70K |
|
1140
Tenaris
TS
$18.5B
| $70K | ﹤0.01% |
+1,939
| New | +$70K |
|
1141
Global X Uranium ETF
URA
$4.31B
| $70K | ﹤0.01% |
5,480
+454
| +9% | +$5.8K |
|
1142
Westamerica Bancorp
WABC
$1.25B
| $70K | ﹤0.01% |
+1,245
| New | +$70K |
|
1143
Arbutus Biopharma
ABUS
$886M
| $69K | ﹤0.01% |
9,551
+2,520
| +36% | +$18.2K |
|
1144
InfraCap MLP ETF
AMZA
$402M
| $69K | ﹤0.01% |
948
-656
| -41% | -$47.7K |
|
1145
KNOT Offshore Partners
KNOP
$313M
| $69K | ﹤0.01% |
+3,132
| New | +$69K |
|
1146
Pool Corp
POOL
$11.9B
| $69K | ﹤0.01% |
456
-475
| -51% | -$71.9K |
|
1147
ProShares Ultra Health Care
RXL
$65.9M
| $69K | ﹤0.01% |
3,064
+1,400
| +84% | +$31.5K |
|
1148
Surgery Partners
SGRY
$2.75B
| $69K | ﹤0.01% |
+4,691
| New | +$69K |
|
|
PRAH
1149
DELISTED
PRA Health Sciences, Inc.
PRAH
| $69K | ﹤0.01% |
+740
| New | +$69K |
|
|
S
1150
DELISTED
Sprint Corporation
S
| $69K | ﹤0.01% |
12,721
-111,347
| -90% | -$604K |
|