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 | |
|---|---|---|---|---|---|---|
|
TBHC
1101
The Brand House Collective, Inc. Common Stock
TBHC
$44.2M
| $79K | ﹤0.01% |
6,862
+4,416
| +181% | +$50.8K |
|
1102
Myriad Genetics
MYGN
$642M
| $79K | ﹤0.01% |
2,126
+1,747
| +461% | +$64.9K |
|
1103
Impinj
PI
$5.53B
| $79K | ﹤0.01% |
+3,588
| New | +$79K |
|
|
VLRS
1104
Controladora Vuela Compañía de Aviación
VLRS
$712M
| $79K | ﹤0.01% |
+15,625
| New | +$79K |
|
|
MODN
1105
DELISTED
MODEL N, INC.
MODN
| $79K | ﹤0.01% |
+4,300
| New | +$79K |
|
|
OAK
1106
DELISTED
OAKTREE CAPITAL GROUP, LLC
OAK
| $79K | ﹤0.01% |
1,954
-1,718
| -47% | -$69.5K |
|
1107
Builders FirstSource
BLDR
$15.5B
| $78K | ﹤0.01% |
4,292
+1,767
| +70% | +$32.1K |
|
1108
Howmet Aerospace
HWM
$74.1B
| $78K | ﹤0.01% |
5,998
-41,256
| -87% | -$537K |
|
1109
Sea Limited
SE
$114B
| $78K | ﹤0.01% |
5,242
+4,239
| +423% | +$63.1K |
|
|
MATR
1110
DELISTED
Mattersight Corp.
MATR
| $78K | ﹤0.01% |
29,391
-2,000
| -6% | -$5.31K |
|
1111
BlackRock TCP Capital
TCPC
$602M
| $77K | ﹤0.01% |
5,366
-5,829
| -52% | -$83.6K |
|
1112
Werner Enterprises
WERN
$1.66B
| $77K | ﹤0.01% |
2,062
+1,988
| +2,686% | +$74.2K |
|
|
NS
1113
DELISTED
NuStar Energy L.P.
NS
| $77K | ﹤0.01% |
3,427
-5,140
| -60% | -$115K |
|
|
FOMX
1114
DELISTED
Foamix Pharmaceuticals Ltd. Ordinary Shares
FOMX
| $77K | ﹤0.01% |
15,445
+13,294
| +618% | +$66.3K |
|
1115
AeroVironment
AVAV
$12.3B
| $76K | ﹤0.01% |
1,073
-2,261
| -68% | -$160K |
|
1116
Illinois Tool Works
ITW
$76.5B
| $76K | ﹤0.01% |
+553
| New | +$76K |
|
1117
MGIC Investment
MTG
$6.54B
| $76K | ﹤0.01% |
7,173
-10,725
| -60% | -$114K |
|
1118
PennantPark Floating Rate Capital
PFLT
$1.01B
| $76K | ﹤0.01% |
5,617
+668
| +13% | +$9.04K |
|
1119
Patterson-UTI
PTEN
$2.11B
| $76K | ﹤0.01% |
4,251
-49,304
| -92% | -$881K |
|
1120
Telephone and Data Systems
TDS
$4.45B
| $76K | ﹤0.01% |
2,785
-2,874
| -51% | -$78.4K |
|
1121
Usana Health Sciences
USNA
$551M
| $76K | ﹤0.01% |
+661
| New | +$76K |
|
|
KL
1122
DELISTED
Kirkland Lake Gold Ltd Ordinary
KL
| $76K | ﹤0.01% |
3,629
-33,674
| -90% | -$705K |
|
1123
Ambev
ABEV
$35.2B
| $75K | ﹤0.01% |
+16,238
| New | +$75K |
|
1124
AGCO
AGCO
$8.02B
| $75K | ﹤0.01% |
+1,244
| New | +$75K |
|
1125
CDW
CDW
$22.4B
| $75K | ﹤0.01% |
+929
| New | +$75K |
|