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 | |
|---|---|---|---|---|---|---|
601
United States 12 Month Oil Fund,
USL
$43.5M
| $562K | ﹤0.01% |
32,747
-28,223
| -46% | -$484K |
|
602
Everest Group
EG
$14.3B
| $560K | ﹤0.01% |
2,393
+1,570
| +191% | +$367K |
|
|
VLDR
603
DELISTED
Velodyne Lidar, Inc. Common Stock
VLDR
| $560K | ﹤0.01% |
+24,553
| New | +$560K |
|
604
Titan International
TWI
$546M
| $558K | ﹤0.01% |
114,886
+110,509
| +2,525% | +$537K |
|
605
Nutanix
NTNX
$20.7B
| $557K | ﹤0.01% |
17,486
-51,833
| -75% | -$1.65M |
|
|
FRC
606
DELISTED
First Republic Bank
FRC
| $556K | ﹤0.01% |
3,786
-2,665
| -41% | -$391K |
|
607
Crocs
CROX
$4.43B
| $554K | ﹤0.01% |
+8,846
| New | +$554K |
|
608
Axon Enterprise
AXON
$58.7B
| $553K | ﹤0.01% |
+4,515
| New | +$553K |
|
609
Knowles
KN
$1.85B
| $551K | ﹤0.01% |
+29,920
| New | +$551K |
|
|
AVYA
610
DELISTED
Avaya Holdings Corp. Common Stock
AVYA
| $549K | ﹤0.01% |
28,715
-9,281
| -24% | -$177K |
|
611
CleanSpark
CLSK
$2.82B
| $546K | ﹤0.01% |
+18,826
| New | +$546K |
|
612
MannKind Corp
MNKD
$1.71B
| $545K | ﹤0.01% |
174,213
+160,719
| +1,191% | +$503K |
|
613
Bright Horizons
BFAM
$6.36B
| $543K | ﹤0.01% |
3,140
-6,807
| -68% | -$1.18M |
|
614
Align Technology
ALGN
$9.64B
| $542K | ﹤0.01% |
1,015
-11,327
| -92% | -$6.05M |
|
615
iShares MSCI Mexico ETF
EWW
$1.86B
| $542K | ﹤0.01% |
12,610
-21,417
| -63% | -$921K |
|
616
Root
ROOT
$1.47B
| $542K | ﹤0.01% |
+1,919
| New | +$542K |
|
617
Madrigal Pharmaceuticals
MDGL
$9.59B
| $539K | ﹤0.01% |
4,850
-4,739
| -49% | -$527K |
|
618
CF Industries
CF
$14.1B
| $538K | ﹤0.01% |
13,906
-17,798
| -56% | -$689K |
|
619
Mitek Systems
MITK
$454M
| $538K | ﹤0.01% |
30,297
+22,498
| +288% | +$400K |
|
620
STAAR Surgical
STAA
$1.37B
| $538K | ﹤0.01% |
6,792
-10,168
| -60% | -$805K |
|
|
DISCK
621
DELISTED
Discovery, Inc. Series C Common Stock
DISCK
| $537K | ﹤0.01% |
20,514
+14,299
| +230% | +$374K |
|
622
Credit Acceptance
CACC
$5.8B
| $536K | ﹤0.01% |
+1,550
| New | +$536K |
|
623
Liberty Global Class A
LBTYA
$3.93B
| $535K | ﹤0.01% |
22,097
-37,967
| -63% | -$919K |
|
624
Lexicon Pharmaceuticals
LXRX
$392M
| $535K | ﹤0.01% |
+156,482
| New | +$535K |
|
|
SWAV
625
DELISTED
Shockwave Medical, Inc. Common Stock
SWAV
| $535K | ﹤0.01% |
5,167
+3,857
| +294% | +$399K |
|