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 | |
|---|---|---|---|---|---|---|
|
REV
801
DELISTED
Revlon, Inc.
REV
| $171K | ﹤0.01% |
9,777
+9,452
| +2,908% | +$165K |
|
802
Protolabs
PRLB
$1.18B
| $170K | ﹤0.01% |
+1,437
| New | +$170K |
|
803
Spectrum Brands
SPB
$1.35B
| $170K | ﹤0.01% |
2,089
-6,036
| -74% | -$491K |
|
804
Genworth Financial
GNW
$3.5B
| $169K | ﹤0.01% |
+37,663
| New | +$169K |
|
805
Barrett Business Services
BBSI
$1.21B
| $168K | ﹤0.01% |
6,960
-152
| -2% | -$3.67K |
|
806
Amplify Transformational Data Sharing ETF
BLOK
$1.22B
| $168K | ﹤0.01% |
8,706
-2,214
| -20% | -$42.7K |
|
|
COL
807
DELISTED
Rockwell Collins
COL
| $168K | ﹤0.01% |
1,253
+400
| +47% | +$53.6K |
|
808
Canadian Natural Resources
CNQ
$64.3B
| $167K | ﹤0.01% |
+9,491
| New | +$167K |
|
809
Atara Biotherapeutics
ATRA
$83.9M
| $166K | ﹤0.01% |
+182
| New | +$166K |
|
810
Ciena
CIEN
$17.3B
| $166K | ﹤0.01% |
6,262
-44,431
| -88% | -$1.18M |
|
811
MarketAxess Holdings
MKTX
$7.03B
| $166K | ﹤0.01% |
840
-195
| -19% | -$38.5K |
|
|
CHUY
812
DELISTED
Chuy's Holdings, Inc. Common Stock
CHUY
| $165K | ﹤0.01% |
5,390
+3,498
| +185% | +$107K |
|
813
Timken Company
TKR
$5.3B
| $164K | ﹤0.01% |
3,777
-10,589
| -74% | -$460K |
|
814
TTEC Holdings
TTEC
$182M
| $164K | ﹤0.01% |
4,763
+4,421
| +1,293% | +$152K |
|
|
BFX
815
DELISTED
BowFlex Inc.
BFX
| $164K | ﹤0.01% |
10,449
+7,751
| +287% | +$122K |
|
|
NLSN
816
DELISTED
Nielsen Holdings plc
NLSN
| $164K | ﹤0.01% |
5,305
+1,011
| +24% | +$31.3K |
|
817
CNA Financial
CNA
$12.8B
| $163K | ﹤0.01% |
3,576
+2,037
| +132% | +$92.9K |
|
818
Carriage Services
CSV
$669M
| $163K | ﹤0.01% |
6,643
-9,501
| -59% | -$233K |
|
|
HPP
819
Hudson Pacific Properties
HPP
$1.11B
| $163K | ﹤0.01% |
4,624
+1,160
| +33% | +$40.9K |
|
820
Ring Energy
REI
$203M
| $163K | ﹤0.01% |
12,988
+6,578
| +103% | +$82.6K |
|
821
Clearwater Paper
CLW
$343M
| $162K | ﹤0.01% |
7,021
-11,965
| -63% | -$276K |
|
822
Vornado Realty Trust
VNO
$7.66B
| $162K | ﹤0.01% |
2,205
-5,948
| -73% | -$437K |
|
|
SPPI
823
DELISTED
Spectrum Pharmaceuticals Inc
SPPI
| $161K | ﹤0.01% |
+7,694
| New | +$161K |
|
824
Nelnet
NNI
$4.52B
| $161K | ﹤0.01% |
2,761
-1,778
| -39% | -$104K |
|
|
INAP
825
DELISTED
Internap Corporation
INAP
| $161K | ﹤0.01% |
15,496
+14,982
| +2,915% | +$156K |
|