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 | |
|---|---|---|---|---|---|---|
726
Builders FirstSource
BLDR
$16.4B
| $292K | ﹤0.01% |
+2,341
| New | +$292K |
|
|
ATYR
727
aTyr Pharma
ATYR
$518M
| $292K | ﹤0.01% |
96,852
+83,691
| +636% | +$252K |
|
728
Capricor Therapeutics
CAPR
$295M
| $291K | ﹤0.01% |
30,727
-34,483
| -53% | -$327K |
|
729
B. Riley Financial
RILY
$185M
| $290K | ﹤0.01% |
74,984
+7,509
| +11% | +$29K |
|
730
Legend Biotech
LEGN
$6.25B
| $289K | ﹤0.01% |
8,524
-1,786
| -17% | -$60.6K |
|
731
Corporacion America
CAAP
$3.25B
| $288K | ﹤0.01% |
15,756
-2,331
| -13% | -$42.6K |
|
732
Community Health Systems
CYH
$420M
| $287K | ﹤0.01% |
106,571
+15,770
| +17% | +$42.5K |
|
733
ProShares Ultra Yen
YCL
$56.1M
| $285K | ﹤0.01% |
+13,046
| New | +$285K |
|
734
ProShares Short Dow30
DOG
$121M
| $284K | ﹤0.01% |
+10,550
| New | +$284K |
|
735
Cemex
CX
$13.7B
| $283K | ﹤0.01% |
50,511
-21,521
| -30% | -$121K |
|
|
EVRI
736
DELISTED
Everi Holdings
EVRI
| $280K | ﹤0.01% |
20,521
-7,722
| -27% | -$105K |
|
737
Montrose Environmental
MEG
$1.07B
| $280K | ﹤0.01% |
19,703
+16,089
| +445% | +$229K |
|
738
MindMed
MNMD
$733M
| $279K | ﹤0.01% |
47,856
+37,628
| +368% | +$219K |
|
739
Performance Food Group
PFGC
$16.6B
| $277K | ﹤0.01% |
+3,535
| New | +$277K |
|
|
LINE
740
Lineage, Inc. Common Stock
LINE
$9.71B
| $276K | ﹤0.01% |
+4,716
| New | +$276K |
|
741
Leonardo DRS
DRS
$11B
| $273K | ﹤0.01% |
+8,315
| New | +$273K |
|
742
China Yuchai International
CYD
$1.42B
| $271K | ﹤0.01% |
15,961
+11,377
| +248% | +$193K |
|
743
Alpha Metallurgical Resources
AMR
$1.86B
| $268K | ﹤0.01% |
2,145
-501
| -19% | -$62.6K |
|
744
Coty
COTY
$3.6B
| $268K | ﹤0.01% |
+49,116
| New | +$268K |
|
745
Camping World
CWH
$1.1B
| $268K | ﹤0.01% |
16,600
-33,776
| -67% | -$545K |
|
746
Lumen
LUMN
$6.54B
| $268K | ﹤0.01% |
68,473
-715,663
| -91% | -$2.8M |
|
747
Tradr 1.25X NVDA Bear Daily ETF
NVDS
$48.8M
| $266K | ﹤0.01% |
9,073
-33,404
| -79% | -$979K |
|
748
Vanguard S&P 500 Growth ETF
VOOG
$19.8B
| $266K | ﹤0.01% |
797
-803
| -50% | -$268K |
|
749
Akebia Therapeutics
AKBA
$782M
| $265K | ﹤0.01% |
138,470
+9,488
| +7% | +$18.2K |
|
750
Capital Southwest
CSWC
$1.27B
| $265K | ﹤0.01% |
+11,898
| New | +$265K |
|