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 |
Invesco QQQ Trust
QQQ
|
+$41.7M |
| 2 |
Mastercard
MA
|
+$33.6M |
| 3 |
Alibaba
BABA
|
+$33.4M |
| 4 |
Apple
AAPL
|
+$27.9M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$26M |
Top Sells
| 1 |
JPMorgan Chase
JPM
|
+$60M |
| 2 |
TSMC
TSM
|
+$49.5M |
| 3 |
iShares Silver Trust
SLV
|
+$26M |
| 4 |
Amazon
AMZN
|
+$25.2M |
| 5 |
Boeing
BA
|
+$22.1M |
Sector Composition
| 1 | Consumer Discretionary | 23.12% |
| 2 | Technology | 13.05% |
| 3 | Healthcare | 11.53% |
| 4 | Industrials | 7.38% |
| 5 | Communication Services | 6.71% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1026
Vanguard Growth ETF
VUG
$189B
| $190K | ﹤0.01% |
752
-727
| -49% | -$184K |
|
|
CDK
1027
DELISTED
CDK Global, Inc.
CDK
| $190K | ﹤0.01% |
+3,682
| New | +$190K |
|
|
MSGN
1028
DELISTED
MSG Networks Inc.
MSGN
| $190K | ﹤0.01% |
12,925
+9,071
| +235% | +$133K |
|
1029
Artivion
AORT
$2B
| $189K | ﹤0.01% |
8,032
+6,111
| +318% | +$144K |
|
1030
Frontline
FRO
$5.12B
| $188K | ﹤0.01% |
30,321
-74,194
| -71% | -$460K |
|
1031
Global Partners
GLP
$1.75B
| $188K | ﹤0.01% |
11,360
+8,760
| +337% | +$145K |
|
1032
CDW
CDW
$21.7B
| $187K | ﹤0.01% |
+1,419
| New | +$187K |
|
1033
Opendoor
OPEN
$7.74B
| $187K | ﹤0.01% |
8,259
-12,587
| -60% | -$285K |
|
1034
Waters Corp
WAT
$18B
| $187K | ﹤0.01% |
758
+279
| +58% | +$68.8K |
|
|
SPPI
1035
DELISTED
Spectrum Pharmaceuticals Inc
SPPI
| $187K | ﹤0.01% |
54,993
+44,388
| +419% | +$151K |
|
|
NPTN
1036
DELISTED
NEOPHOTONICS CORP
NPTN
| $187K | ﹤0.01% |
20,635
+3,846
| +23% | +$34.9K |
|
1037
AdvanSix
ASIX
$586M
| $186K | ﹤0.01% |
9,317
-2,735
| -23% | -$54.6K |
|
|
DAO
1038
Youdao
DAO
$1.06B
| $186K | ﹤0.01% |
+7,016
| New | +$186K |
|
1039
Main Street Capital
MAIN
$6.01B
| $186K | ﹤0.01% |
5,789
-3,154
| -35% | -$101K |
|
|
RVNC
1040
DELISTED
Revance Therapeutics, Inc.
RVNC
| $186K | ﹤0.01% |
6,592
-1,098
| -14% | -$31K |
|
|
XENT
1041
DELISTED
Intersect ENT, Inc
XENT
| $186K | ﹤0.01% |
8,143
+4,028
| +98% | +$92K |
|
|
MIK
1042
DELISTED
Michaels Stores, Inc
MIK
| $186K | ﹤0.01% |
14,349
+9,141
| +176% | +$118K |
|
1043
Post Holdings
POST
$5.76B
| $185K | ﹤0.01% |
+2,801
| New | +$185K |
|
|
GERM
1044
DELISTED
Amplify Treatments, Testing and Advancements ETF
GERM
| $185K | ﹤0.01% |
+5,965
| New | +$185K |
|
|
AVID
1045
DELISTED
Avid Technology Inc
AVID
| $185K | ﹤0.01% |
11,675
+2,513
| +27% | +$39.8K |
|
1046
Enovis
ENOV
$1.81B
| $183K | ﹤0.01% |
+2,788
| New | +$183K |
|
|
ACB
1047
Aurora Cannabis
ACB
$277M
| $182K | ﹤0.01% |
2,200
-1,050
| -32% | -$86.9K |
|
1048
Precigen
PGEN
$1.23B
| $182K | ﹤0.01% |
17,938
-62,590
| -78% | -$635K |
|
1049
PPG Industries
PPG
$25.2B
| $182K | ﹤0.01% |
+1,267
| New | +$182K |
|
1050
Smith Micro Software
SMSI
$15.4M
| $182K | ﹤0.01% |
4,204
-2,321
| -36% | -$100K |
|