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 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$278M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$84.4M |
| 3 |
NVIDIA
NVDA
|
+$76.9M |
| 4 |
TSMC
TSM
|
+$74.9M |
| 5 |
Amazon
AMZN
|
+$53.5M |
Top Sells
| 1 |
Apple
AAPL
|
+$497M |
| 2 |
Strategy Inc Common Stock Class A
MSTR
|
+$73.7M |
| 3 |
Alibaba
BABA
|
+$49M |
| 4 |
Advanced Micro Devices
AMD
|
+$48.1M |
| 5 |
Uber
UBER
|
+$41.8M |
Sector Composition
| 1 | Technology | 22.9% |
| 2 | Consumer Discretionary | 12.26% |
| 3 | Healthcare | 9.52% |
| 4 | Communication Services | 8.42% |
| 5 | Financials | 7.07% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
LADR
1676
Ladder Capital
LADR
$1.48B
| $14K | ﹤0.01% |
1,298
-2,081
| -62% | -$22.4K |
|
1677
MediWound
MDWD
$194M
| $14K | ﹤0.01% |
932
+541
| +138% | +$8.13K |
|
1678
Noodles & Co
NDLS
$30.7M
| $14K | ﹤0.01% |
13,386
+13,281
| +12,649% | +$13.9K |
|
1679
Nine Energy Service
NINE
$30.5M
| $14K | ﹤0.01% |
12,759
+6,085
| +91% | +$6.68K |
|
1680
Saratoga Investment
SAR
$391M
| $14K | ﹤0.01% |
568
+321
| +130% | +$7.91K |
|
1681
Cassava Sciences
SAVA
$102M
| $14K | ﹤0.01% |
9,944
-50,977
| -84% | -$71.8K |
|
1682
Tradr 2X Long Innovation ETF
TARK
$33.6M
| $14K | ﹤0.01% |
515
-649
| -56% | -$17.6K |
|
1683
Westlake Corp
WLK
$11.3B
| $14K | ﹤0.01% |
146
-2,083
| -93% | -$200K |
|
1684
ARK Fintech Innovation ETF
ARKF
$1.37B
| $13K | ﹤0.01% |
392
-5,639
| -94% | -$187K |
|
1685
Avantis International Equity ETF
AVDE
$8.98B
| $13K | ﹤0.01% |
202
-122
| -38% | -$7.85K |
|
1686
Blackbaud
BLKB
$3.38B
| $13K | ﹤0.01% |
+214
| New | +$13K |
|
1687
iShares CMBS ETF
CMBS
$468M
| $13K | ﹤0.01% |
286
| – | – |
|
1688
Custom Truck One Source
CTOS
$1.29B
| $13K | ﹤0.01% |
+3,171
| New | +$13K |
|
1689
Day One Biopharmaceuticals
DAWN
$729M
| $13K | ﹤0.01% |
+1,665
| New | +$13K |
|
1690
WisdomTree Emerging Markets SmallCap Dividend Fund
DGS
$1.67B
| $13K | ﹤0.01% |
+285
| New | +$13K |
|
1691
Digimarc
DMRC
$204M
| $13K | ﹤0.01% |
1,082
-7,140
| -87% | -$85.8K |
|
1692
4D Molecular Therapeutics
FDMT
$318M
| $13K | ﹤0.01% |
4,313
-10,418
| -71% | -$31.4K |
|
1693
The Greenbrier Companies
GBX
$1.42B
| $13K | ﹤0.01% |
+257
| New | +$13K |
|
1694
Inovio Pharmaceuticals
INO
$126M
| $13K | ﹤0.01% |
8,176
-17,617
| -68% | -$28K |
|
1695
Defiance R2000 Enhanced Options Income ETF
IWMY
$141M
| $13K | ﹤0.01% |
540
-4,489
| -89% | -$108K |
|
1696
Laser Photonics
LASE
$37M
| $13K | ﹤0.01% |
4,405
+2,732
| +163% | +$8.06K |
|
1697
LanzaTech
LNZA
$45.1M
| $13K | ﹤0.01% |
552
+407
| +281% | +$9.59K |
|
|
LSEA
1698
DELISTED
Landsea Homes
LSEA
| $13K | ﹤0.01% |
2,097
-17,448
| -89% | -$108K |
|
1699
M/I Homes
MHO
$4.07B
| $13K | ﹤0.01% |
+114
| New | +$13K |
|
1700
PennantPark Floating Rate Capital
PFLT
$1.01B
| $13K | ﹤0.01% |
+1,233
| New | +$13K |
|