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 |
Alphabet (Google) Class C
GOOG
|
+$54.6M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$52.5M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
+$40.9M |
| 4 |
Apple
AAPL
|
+$16.5M |
| 5 |
Visa
V
|
+$12M |
Top Sells
| 1 |
Amazon
AMZN
|
+$98.7M |
| 2 |
Meta Platforms (Facebook)
META
|
+$70.7M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$33.4M |
| 4 |
Goldman Sachs
GS
|
+$30.2M |
| 5 |
Boeing
BA
|
+$26.5M |
Sector Composition
| 1 | Communication Services | 14.71% |
| 2 | Consumer Discretionary | 14.32% |
| 3 | Technology | 11.86% |
| 4 | Financials | 7.38% |
| 5 | Industrials | 6.44% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
TSG
626
DELISTED
The Stars Group Inc.
TSG
| $211K | ﹤0.01% |
12,822
-7,830
| -38% | -$129K |
|
|
EV
627
DELISTED
Eaton Vance Corp.
EV
| $210K | ﹤0.01% |
+5,980
| New | +$210K |
|
|
TGH
628
DELISTED
Textainer Group Holdings limited
TGH
| $209K | ﹤0.01% |
21,050
+18,118
| +618% | +$180K |
|
629
Protolabs
PRLB
$1.17B
| $206K | ﹤0.01% |
+1,829
| New | +$206K |
|
630
National Fuel Gas
NFG
$7.87B
| $205K | ﹤0.01% |
4,020
+1,332
| +50% | +$67.9K |
|
|
RAD
631
DELISTED
Rite Aid Corporation
RAD
| $205K | ﹤0.01% |
14,500
+3,111
| +27% | +$44K |
|
|
ARNA
632
DELISTED
Arena Pharmaceuticals Inc
ARNA
| $205K | ﹤0.01% |
5,281
+1,281
| +32% | +$49.7K |
|
|
LORL
633
DELISTED
Loral Space and Communications, Inc.
LORL
| $205K | ﹤0.01% |
5,521
-2,070
| -27% | -$76.9K |
|
634
Paycom
PAYC
$12.4B
| $204K | ﹤0.01% |
+1,669
| New | +$204K |
|
635
Pilgrim's Pride
PPC
$10.3B
| $204K | ﹤0.01% |
13,182
+5,417
| +70% | +$83.8K |
|
|
AXE
636
DELISTED
Anixter International Inc
AXE
| $204K | ﹤0.01% |
+3,770
| New | +$204K |
|
637
CSG Systems International
CSGS
$1.82B
| $201K | ﹤0.01% |
+6,331
| New | +$201K |
|
638
Compass Minerals
CMP
$752M
| $200K | ﹤0.01% |
4,808
+4,165
| +648% | +$173K |
|
639
Hexcel
HXL
$4.93B
| $200K | ﹤0.01% |
3,494
-3,833
| -52% | -$219K |
|
|
WMGI
640
DELISTED
Wright Medical Group Inc
WMGI
| $200K | ﹤0.01% |
7,378
+5,796
| +366% | +$157K |
|
641
Copart
CPRT
$46.9B
| $199K | ﹤0.01% |
16,732
-21,628
| -56% | -$257K |
|
642
Nelnet
NNI
$4.44B
| $199K | ﹤0.01% |
3,804
-4,436
| -54% | -$232K |
|
|
CY
643
DELISTED
Cypress Semiconductor
CY
| $197K | ﹤0.01% |
15,512
-18,764
| -55% | -$238K |
|
644
DMC Global
BOOM
$141M
| $196K | ﹤0.01% |
5,602
+3,681
| +192% | +$129K |
|
645
FTI Consulting
FCN
$5.23B
| $195K | ﹤0.01% |
2,932
-5,626
| -66% | -$374K |
|
646
Heritage Commerce
HTBK
$630M
| $195K | ﹤0.01% |
17,267
+4,806
| +39% | +$54.3K |
|
647
Quanta Services
PWR
$58.1B
| $195K | ﹤0.01% |
6,490
+6,125
| +1,678% | +$184K |
|
|
TVRD
648
Tvardi Therapeutics, Inc. Common Stock
TVRD
$308M
| $194K | ﹤0.01% |
415
-104
| -20% | -$48.6K |
|
|
IMPV
649
DELISTED
Imperva, Inc.
IMPV
| $194K | ﹤0.01% |
+3,488
| New | +$194K |
|
650
iShares S&P Mid-Cap 400 Growth ETF
IJK
$9.14B
| $192K | ﹤0.01% |
4,032
+2,792
| +225% | +$133K |
|