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 | |
|---|---|---|---|---|---|---|
1201
Danaos Corp
DAC
$1.73B
| $72K | ﹤0.01% |
928
-2,066
| -69% | -$160K |
|
1202
StealthGas
GASS
$271M
| $72K | ﹤0.01% |
12,846
-2,444
| -16% | -$13.7K |
|
1203
iHeartMedia
IHRT
$389M
| $72K | ﹤0.01% |
+43,915
| New | +$72K |
|
1204
TopBuild
BLD
$11.7B
| $71K | ﹤0.01% |
234
+56
| +31% | +$17K |
|
1205
Topgolf Callaway Brands
MODG
$1.76B
| $71K | ﹤0.01% |
+10,882
| New | +$71K |
|
|
ACRE
1206
Ares Commercial Real Estate
ACRE
$266M
| $70K | ﹤0.01% |
15,271
+8,341
| +120% | +$38.2K |
|
1207
Ametek
AME
$43.9B
| $70K | ﹤0.01% |
+411
| New | +$70K |
|
1208
Simplify Managed Futures Strategy ETF
CTA
$1.15B
| $70K | ﹤0.01% |
+2,369
| New | +$70K |
|
1209
Green Dot
GDOT
$751M
| $70K | ﹤0.01% |
8,373
+8,000
| +2,145% | +$66.9K |
|
1210
VanEck Steel ETF
SLX
$82.3M
| $70K | ﹤0.01% |
1,140
+525
| +85% | +$32.2K |
|
1211
Surmodics
SRDX
$457M
| $70K | ﹤0.01% |
2,300
+653
| +40% | +$19.9K |
|
1212
ProShares UltraPro Short Russell2000
SRTY
$79.9M
| $70K | ﹤0.01% |
+2,841
| New | +$70K |
|
1213
Flywire
FLYW
$1.63B
| $69K | ﹤0.01% |
+7,326
| New | +$69K |
|
1214
PROG Holdings
PRG
$1.41B
| $69K | ﹤0.01% |
2,620
+2,388
| +1,029% | +$62.9K |
|
1215
Spire Global
SPIR
$307M
| $69K | ﹤0.01% |
8,572
-4,156
| -33% | -$33.5K |
|
|
SMCX
1216
Defiance Daily Target 2X Long SMCI ETF
SMCX
$295M
| $69K | ﹤0.01% |
2,162
-10,103
| -82% | -$322K |
|
1217
Badger Meter
BMI
$5.24B
| $68K | ﹤0.01% |
+361
| New | +$68K |
|
1218
Nkarta
NKTX
$140M
| $68K | ﹤0.01% |
37,239
-167,755
| -82% | -$306K |
|
1219
Amplify Junior Silver Miners ETF
SILJ
$2.28B
| $68K | ﹤0.01% |
5,617
-1,978
| -26% | -$23.9K |
|
1220
Equitable Holdings
EQH
$16.2B
| $67K | ﹤0.01% |
+1,288
| New | +$67K |
|
1221
Senseonics Holdings
SENS
$375M
| $67K | ﹤0.01% |
+102,289
| New | +$67K |
|
1222
China Automotive Systems
CAAS
$138M
| $66K | ﹤0.01% |
14,979
-8,127
| -35% | -$35.8K |
|
1223
Virtus InfraCap US Preferred Stock ETF
PFFA
$1.83B
| $66K | ﹤0.01% |
3,129
+982
| +46% | +$20.7K |
|
1224
WisdomTree Emerging Markets High Dividend Fund
DEM
$3.18B
| $65K | ﹤0.01% |
+1,555
| New | +$65K |
|
1225
Sun Communities
SUI
$16.3B
| $65K | ﹤0.01% |
510
-2,884
| -85% | -$368K |
|