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 |
Apple
AAPL
|
+$586M |
| 2 |
Strategy Inc Common Stock Class A
MSTR
|
+$82.5M |
| 3 |
Intel
INTC
|
+$40.4M |
| 4 |
Invesco QQQ Trust
QQQ
|
+$39.4M |
| 5 |
Uber
UBER
|
+$36.3M |
Top Sells
| 1 |
NVIDIA
NVDA
|
+$130M |
| 2 |
Pinduoduo
PDD
|
+$95.7M |
| 3 |
Boeing
BA
|
+$56.2M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$40.7M |
| 5 |
Microsoft
MSFT
|
+$40.5M |
Sector Composition
| 1 | Technology | 34.29% |
| 2 | Consumer Discretionary | 11.38% |
| 3 | Healthcare | 9.65% |
| 4 | Financials | 6.33% |
| 5 | Communication Services | 5.52% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1726
ProShares Ultra Real Estate
URE
$60.8M
| $18K | ﹤0.01% |
+293
| New | +$18K |
|
|
DM
1727
DELISTED
Desktop Metal, Inc.
DM
| $18K | ﹤0.01% |
8,029
-2,241
| -22% | -$5.02K |
|
1728
Cullinan Oncology
CGEM
$386M
| $17K | ﹤0.01% |
1,403
-6,220
| -82% | -$75.4K |
|
1729
Chesapeake Utilities
CPK
$2.95B
| $17K | ﹤0.01% |
144
+85
| +144% | +$10K |
|
|
FL
1730
DELISTED
Foot Locker
FL
| $17K | ﹤0.01% |
817
-145,877
| -99% | -$3.04M |
|
1731
GeoPark
GPRK
$325M
| $17K | ﹤0.01% |
1,912
-6,423
| -77% | -$57.1K |
|
1732
First Trust NASDAQ Clean Edge Smart Grid Infrastructure Index Fund
GRID
$3.34B
| $17K | ﹤0.01% |
+150
| New | +$17K |
|
1733
Inhibrx
INBX
$399M
| $17K | ﹤0.01% |
1,147
-1,003
| -47% | -$14.9K |
|
1734
James River Group
JRVR
$244M
| $17K | ﹤0.01% |
3,649
-26,771
| -88% | -$125K |
|
1735
iShares MSCI Saudi Arabia ETF
KSA
$558M
| $17K | ﹤0.01% |
+428
| New | +$17K |
|
1736
LeMaitre Vascular
LMAT
$2.09B
| $17K | ﹤0.01% |
+194
| New | +$17K |
|
1737
ProShares Ultra Technology
ROM
$815M
| $17K | ﹤0.01% |
+251
| New | +$17K |
|
1738
Virco
VIRC
$126M
| $17K | ﹤0.01% |
1,697
-10,761
| -86% | -$108K |
|
1739
Expro
XPRO
$1.43B
| $17K | ﹤0.01% |
+1,434
| New | +$17K |
|
|
WDTE
1740
Defiance S&P 500 Enhanced Options & 0DTE Income ETF
WDTE
$73.3M
| $17K | ﹤0.01% |
+456
| New | +$17K |
|
1741
Acco Brands
ACCO
$361M
| $16K | ﹤0.01% |
3,077
+2,774
| +916% | +$14.4K |
|
1742
Aclaris Therapeutics
ACRS
$211M
| $16K | ﹤0.01% |
6,695
+5,610
| +517% | +$13.4K |
|
1743
Traeger
COOK
$177M
| $16K | ﹤0.01% |
6,724
+5,253
| +357% | +$12.5K |
|
1744
Cheniere Energy
CQP
$25.2B
| $16K | ﹤0.01% |
+310
| New | +$16K |
|
1745
Eventbrite
EB
$262M
| $16K | ﹤0.01% |
4,921
-6,040
| -55% | -$19.6K |
|
1746
JPMorgan Ultra-Short Income ETF
JPST
$33.5B
| $16K | ﹤0.01% |
+329
| New | +$16K |
|
1747
RLI Corp
RLI
$6.14B
| $16K | ﹤0.01% |
+204
| New | +$16K |
|
1748
STAAR Surgical
STAA
$1.37B
| $16K | ﹤0.01% |
690
-32,254
| -98% | -$748K |
|
1749
Stoke Therapeutics
STOK
$1.29B
| $16K | ﹤0.01% |
1,481
-1,157
| -44% | -$12.5K |
|
1750
TPG
TPG
$9.05B
| $16K | ﹤0.01% |
+263
| New | +$16K |
|