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 | |
|---|---|---|---|---|---|---|
1151
FuelCell Energy
FCEL
$209M
| $107K | ﹤0.01% |
+19,084
| New | +$107K |
|
1152
Magnachip Semiconductor
MX
$110M
| $107K | ﹤0.01% |
27,003
+11,632
| +76% | +$46.1K |
|
1153
Nu Skin
NUS
$579M
| $107K | ﹤0.01% |
13,493
+13,053
| +2,967% | +$104K |
|
1154
Yext
YEXT
$1.07B
| $107K | ﹤0.01% |
12,593
+8,777
| +230% | +$74.6K |
|
1155
Alta Equipment Group
ALTG
$242M
| $106K | ﹤0.01% |
+16,787
| New | +$106K |
|
1156
Capital Group Core Equity ETF
CGUS
$7.25B
| $106K | ﹤0.01% |
2,886
+1,804
| +167% | +$66.3K |
|
1157
Gerdau
GGB
$6.21B
| $106K | ﹤0.01% |
36,478
-6,190
| -15% | -$18K |
|
1158
Tiziana Life Sciences
TLSA
$209M
| $106K | ﹤0.01% |
+67,251
| New | +$106K |
|
1159
Seanergy Maritime Holdings
SHIP
$181M
| $105K | ﹤0.01% |
16,700
-11,189
| -40% | -$70.4K |
|
1160
Fabrinet
FN
$12.9B
| $104K | ﹤0.01% |
356
-3,486
| -91% | -$1.02M |
|
1161
Radware
RDWR
$1.12B
| $104K | ﹤0.01% |
3,562
+604
| +20% | +$17.6K |
|
|
AIBU
1162
Direxion Daily AI and Big Data Bull 2X Shares
AIBU
$25.5M
| $104K | ﹤0.01% |
2,481
+1,844
| +289% | +$77.3K |
|
1163
AAR Corp
AIR
$2.71B
| $103K | ﹤0.01% |
+1,511
| New | +$103K |
|
1164
Helmerich & Payne
HP
$2.08B
| $103K | ﹤0.01% |
6,799
+3,557
| +110% | +$53.9K |
|
1165
WK Kellogg Co
KLG
$1.99B
| $103K | ﹤0.01% |
+6,479
| New | +$103K |
|
1166
Portillo's
PTLO
$442M
| $103K | ﹤0.01% |
8,881
-23,790
| -73% | -$276K |
|
|
SY
1167
So-Young International
SY
$378M
| $103K | ﹤0.01% |
33,230
+33,059
| +19,333% | +$102K |
|
1168
BioCryst Pharmaceuticals
BCRX
$1.69B
| $102K | ﹤0.01% |
11,484
-21,665
| -65% | -$192K |
|
1169
REX FANG & Innovation Equity Premium Income ETF
FEPI
$514M
| $102K | ﹤0.01% |
2,259
+379
| +20% | +$17.1K |
|
|
TRVG
1170
trivago
TRVG
$231M
| $102K | ﹤0.01% |
27,310
+724
| +3% | +$2.7K |
|
1171
Butterfly Network
BFLY
$390M
| $101K | ﹤0.01% |
50,540
+15,811
| +46% | +$31.6K |
|
1172
Gray Television
GTN
$599M
| $101K | ﹤0.01% |
22,424
+8,099
| +57% | +$36.5K |
|
1173
NewAmsterdam Pharma
NAMS
$3B
| $101K | ﹤0.01% |
5,604
+3,076
| +122% | +$55.4K |
|
1174
Rocket Pharmaceuticals
RCKT
$354M
| $101K | ﹤0.01% |
+41,379
| New | +$101K |
|
1175
AngioDynamics
ANGO
$445M
| $100K | ﹤0.01% |
10,120
+1,715
| +20% | +$16.9K |
|