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 |
NVIDIA
NVDA
|
+$216M |
| 2 |
Apple
AAPL
|
+$159M |
| 3 |
Broadcom
AVGO
|
+$128M |
| 4 |
Booking.com
BKNG
|
+$62.2M |
| 5 |
SPDR S&P 500 ETF Trust
SPY
|
+$61.9M |
Top Sells
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$141M |
| 2 |
Amazon
AMZN
|
+$53.1M |
| 3 |
TSMC
TSM
|
+$45.7M |
| 4 |
Netflix
NFLX
|
+$45.3M |
| 5 |
Pfizer
PFE
|
+$38.3M |
Sector Composition
| 1 | Technology | 34.74% |
| 2 | Communication Services | 9% |
| 3 | Consumer Discretionary | 8.67% |
| 4 | Healthcare | 8.07% |
| 5 | Financials | 6.4% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1226
iShares MSCI South Africa ETF
EZA
$442M
| $88K | ﹤0.01% |
+1,648
| New | +$88K |
|
1227
HEICO Class A
HEI.A
$35B
| $88K | ﹤0.01% |
343
-481
| -58% | -$123K |
|
1228
Ivanhoe Electric
IE
$1.17B
| $88K | ﹤0.01% |
9,808
+4,033
| +70% | +$36.2K |
|
1229
Advanced Drainage Systems
WMS
$11B
| $88K | ﹤0.01% |
774
-2,455
| -76% | -$279K |
|
1230
BlackBerry
BB
$2.3B
| $87K | ﹤0.01% |
19,141
-153,309
| -89% | -$697K |
|
1231
Forward Air
FWRD
$913M
| $87K | ﹤0.01% |
+3,563
| New | +$87K |
|
1232
NCR Atleos
NATL
$2.85B
| $87K | ﹤0.01% |
3,077
+1,535
| +100% | +$43.4K |
|
1233
VanEck Rare Earth/Strategic Metals ETF
REMX
$732M
| $87K | ﹤0.01% |
+2,145
| New | +$87K |
|
1234
Spero Therapeutics
SPRO
$110M
| $87K | ﹤0.01% |
30,322
+25,224
| +495% | +$72.4K |
|
1235
Atour Lifestyle Holdings
ATAT
$5.42B
| $86K | ﹤0.01% |
+2,670
| New | +$86K |
|
1236
Bausch Health
BHC
$2.64B
| $86K | ﹤0.01% |
13,027
-56,203
| -81% | -$371K |
|
1237
Reviva Pharmaceuticals
RVPH
$30.1M
| $86K | ﹤0.01% |
+228,065
| New | +$86K |
|
1238
Vanguard Mid-Cap Value ETF
VOE
$19B
| $86K | ﹤0.01% |
+528
| New | +$86K |
|
1239
Zeekr
ZK
$7.52B
| $86K | ﹤0.01% |
3,409
-39,767
| -92% | -$1M |
|
1240
Kaspi.kz JSC
KSPI
$16.2B
| $84K | ﹤0.01% |
+999
| New | +$84K |
|
1241
NET Power
NPWR
$166M
| $84K | ﹤0.01% |
34,232
+25,560
| +295% | +$62.7K |
|
|
PINE
1242
Alpine Income Property Trust
PINE
$217M
| $84K | ﹤0.01% |
5,747
+3,313
| +136% | +$48.4K |
|
1243
ADS-TEC Energy
ADSE
$547M
| $83K | ﹤0.01% |
+6,076
| New | +$83K |
|
1244
Allegion
ALLE
$14.6B
| $83K | ﹤0.01% |
+580
| New | +$83K |
|
1245
StealthGas
GASS
$272M
| $83K | ﹤0.01% |
13,071
+225
| +2% | +$1.43K |
|
1246
Jasper Therapeutics
JSPR
$41.9M
| $83K | ﹤0.01% |
+15,025
| New | +$83K |
|
1247
ProShares UltraPro Short 20+ Year Treasury
TTT
$21.5M
| $83K | ﹤0.01% |
+1,155
| New | +$83K |
|
1248
Pacer US Small Cap Cash Cows 100 ETF
CALF
$4.15B
| $82K | ﹤0.01% |
2,082
+1,917
| +1,162% | +$75.5K |
|
1249
First Trust Exchange-Traded Fund II First Trust International Equity Opportunities ETF
FPXI
$159M
| $82K | ﹤0.01% |
1,454
+89
| +7% | +$5.02K |
|
1250
LGI Homes
LGIH
$1.41B
| $82K | ﹤0.01% |
+1,594
| New | +$82K |
|