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 | |
|---|---|---|---|---|---|---|
1151
ProPetro Holding
PUMP
$486M
| $81K | ﹤0.01% |
+11,031
| New | +$81K |
|
1152
Revolve Group
RVLV
$1.6B
| $81K | ﹤0.01% |
3,793
-2,708
| -42% | -$57.8K |
|
|
BIOA
1153
BioAge Labs, Inc. Common Stock
BIOA
$172M
| $81K | ﹤0.01% |
+21,603
| New | +$81K |
|
1154
ACI Worldwide
ACIW
$5.2B
| $80K | ﹤0.01% |
1,480
-832
| -36% | -$45K |
|
1155
Church & Dwight Co
CHD
$22.7B
| $80K | ﹤0.01% |
+730
| New | +$80K |
|
1156
Cumberland Pharmaceuticals
CPIX
$52.1M
| $80K | ﹤0.01% |
+19,100
| New | +$80K |
|
1157
Donaldson
DCI
$9.47B
| $80K | ﹤0.01% |
+1,196
| New | +$80K |
|
1158
GeoPark
GPRK
$325M
| $80K | ﹤0.01% |
9,915
+8,003
| +419% | +$64.6K |
|
1159
Heartland Express
HTLD
$660M
| $80K | ﹤0.01% |
8,701
+8,698
| +289,933% | +$80K |
|
1160
Lexicon Pharmaceuticals
LXRX
$414M
| $80K | ﹤0.01% |
174,982
+78,899
| +82% | +$36.1K |
|
1161
MediaAlpha
MAX
$691M
| $80K | ﹤0.01% |
8,718
+6,981
| +402% | +$64.1K |
|
1162
Nutrien
NTR
$27.7B
| $80K | ﹤0.01% |
1,627
-33,890
| -95% | -$1.67M |
|
1163
ASE Group
ASX
$24.1B
| $79K | ﹤0.01% |
9,063
-9,710
| -52% | -$84.6K |
|
1164
Butterfly Network
BFLY
$393M
| $79K | ﹤0.01% |
34,729
-62,389
| -64% | -$142K |
|
1165
Catalyst Pharmaceutical
CPRX
$2.45B
| $79K | ﹤0.01% |
+3,261
| New | +$79K |
|
1166
AngioDynamics
ANGO
$432M
| $78K | ﹤0.01% |
8,405
+1,600
| +24% | +$14.8K |
|
1167
Ceragon Networks
CRNT
$180M
| $78K | ﹤0.01% |
33,552
-12,299
| -27% | -$28.6K |
|
1168
REX FANG & Innovation Equity Premium Income ETF
FEPI
$518M
| $78K | ﹤0.01% |
+1,880
| New | +$78K |
|
1169
Group 1 Automotive
GPI
$6.06B
| $78K | ﹤0.01% |
206
-7,261
| -97% | -$2.75M |
|
1170
Bitdeer Technologies
BTDR
$3.43B
| $77K | ﹤0.01% |
8,796
-6,600
| -43% | -$57.8K |
|
1171
Cardlytics
CDLX
$60.2M
| $77K | ﹤0.01% |
42,370
-27,109
| -39% | -$49.3K |
|
1172
Claros Mortgage Trust
CMTG
$533M
| $77K | ﹤0.01% |
20,765
+15,585
| +301% | +$57.8K |
|
1173
Dominion Energy
D
$51.3B
| $77K | ﹤0.01% |
+1,386
| New | +$77K |
|
1174
The Honest Company
HNST
$447M
| $77K | ﹤0.01% |
16,568
-95,349
| -85% | -$443K |
|
1175
Miller Industries
MLR
$457M
| $77K | ﹤0.01% |
+1,819
| New | +$77K |
|