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 | |
|---|---|---|---|---|---|---|
676
Gerdau
GGB
$6.17B
| $264K | ﹤0.01% |
79,166
-93,421
| -54% | -$312K |
|
677
Patterson-UTI
PTEN
$2.11B
| $264K | ﹤0.01% |
15,443
+11,192
| +263% | +$191K |
|
678
Prothena Corp
PRTA
$447M
| $263K | ﹤0.01% |
20,163
+18,893
| +1,488% | +$246K |
|
679
Antero Midstream
AM
$8.79B
| $262K | ﹤0.01% |
+15,509
| New | +$262K |
|
680
ProShares Ultra VIX Short-Term Futures ETF
UVXY
$595M
| $262K | ﹤0.01% |
+14
| New | +$262K |
|
|
TERP
681
DELISTED
TerraForm Power, Inc
TERP
| $262K | ﹤0.01% |
22,740
+18,092
| +389% | +$208K |
|
682
First Trust Dow Jones Internet Index Fund ETF
FDN
$7.91B
| $261K | ﹤0.01% |
1,849
-5,906
| -76% | -$834K |
|
|
RDC
683
DELISTED
Rowan Companies Plc
RDC
| $261K | ﹤0.01% |
13,861
+13,423
| +3,065% | +$253K |
|
684
Masco
MAS
$15.3B
| $260K | ﹤0.01% |
7,119
+6,673
| +1,496% | +$244K |
|
685
Digimarc
DMRC
$203M
| $259K | ﹤0.01% |
8,261
-8,405
| -50% | -$264K |
|
686
Bank OZK
OZK
$5.89B
| $258K | ﹤0.01% |
6,813
+5,883
| +633% | +$223K |
|
|
AD
687
Array Digital Infrastructure, Inc.
AD
$4.41B
| $257K | ﹤0.01% |
5,744
+2,210
| +63% | +$98.9K |
|
688
SL Green Realty
SLG
$4.29B
| $256K | ﹤0.01% |
2,714
-71
| -3% | -$6.7K |
|
689
Direxion Daily MSCI India Bull 2X Shares
INDL
$68M
| $255K | ﹤0.01% |
3,879
+26
| +0.7% | +$1.71K |
|
|
ONIT
690
Onity Group Inc.
ONIT
$352M
| $255K | ﹤0.01% |
+4,329
| New | +$255K |
|
691
Monarch Casino & Resort
MCRI
$1.87B
| $254K | ﹤0.01% |
5,607
+3,388
| +153% | +$153K |
|
|
ENLK
692
DELISTED
EnLink Midstream Partners, LP
ENLK
| $254K | ﹤0.01% |
+13,661
| New | +$254K |
|
693
Angi Inc
ANGI
$769M
| $252K | ﹤0.01% |
1,074
+1,054
| +5,270% | +$247K |
|
694
Braskem
BAK
$1.31B
| $252K | ﹤0.01% |
8,741
-28,820
| -77% | -$831K |
|
695
Motorcar Parts of America
MPAA
$284M
| $252K | ﹤0.01% |
10,761
+9,924
| +1,186% | +$232K |
|
696
Supernus Pharmaceuticals
SUPN
$2.59B
| $252K | ﹤0.01% |
5,006
-106
| -2% | -$5.34K |
|
|
MRNS
697
DELISTED
Marinus Pharmaceuticals, Inc
MRNS
| $252K | ﹤0.01% |
+6,311
| New | +$252K |
|
|
INAP
698
DELISTED
Internap Corporation
INAP
| $251K | ﹤0.01% |
19,879
+4,383
| +28% | +$55.3K |
|
699
Vanguard Total Bond Market
BND
$135B
| $249K | ﹤0.01% |
+3,167
| New | +$249K |
|
700
Synovus
SNV
$7.13B
| $249K | ﹤0.01% |
+5,442
| New | +$249K |
|