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 | |
|---|---|---|---|---|---|---|
326
NiSource
NI
$18.9B
| $1.19M | ﹤0.01% |
+29,702
| New | +$1.19M |
|
327
American Water Works
AWK
$27.3B
| $1.18M | ﹤0.01% |
7,979
+1,720
| +27% | +$254K |
|
328
Roivant Sciences
ROIV
$8.82B
| $1.17M | ﹤0.01% |
+116,204
| New | +$1.17M |
|
329
Full Truck Alliance
YMM
$13.8B
| $1.17M | ﹤0.01% |
+91,829
| New | +$1.17M |
|
|
BTC
330
Grayscale Bitcoin Mini Trust ETF
BTC
$4.9B
| $1.17M | ﹤0.01% |
32,121
+22,557
| +236% | +$823K |
|
|
NVEE
331
DELISTED
NV5 Global
NVEE
| $1.17M | ﹤0.01% |
60,604
+58,796
| +3,252% | +$1.13M |
|
332
Liquidia Corp
LQDA
$2.41B
| $1.17M | ﹤0.01% |
79,027
+38,793
| +96% | +$572K |
|
333
NETGEAR
NTGR
$817M
| $1.16M | ﹤0.01% |
47,455
+16,778
| +55% | +$410K |
|
334
iShares MSCI South Korea ETF
EWY
$5.26B
| $1.16M | ﹤0.01% |
21,441
-24,255
| -53% | -$1.31M |
|
335
Lemonade
LMND
$3.91B
| $1.16M | ﹤0.01% |
36,769
+28,952
| +370% | +$909K |
|
336
Direxion Daily Energy Bull 2X Shares
ERX
$217M
| $1.15M | ﹤0.01% |
+17,603
| New | +$1.15M |
|
337
Ambac
AMBC
$426M
| $1.14M | ﹤0.01% |
+130,671
| New | +$1.14M |
|
338
Starwood Property Trust
STWD
$7.53B
| $1.14M | ﹤0.01% |
+57,849
| New | +$1.14M |
|
339
TechnipFMC
FTI
$16.1B
| $1.14M | ﹤0.01% |
+35,959
| New | +$1.14M |
|
340
The Mosaic Company
MOS
$10.3B
| $1.14M | ﹤0.01% |
42,133
-64,919
| -61% | -$1.75M |
|
341
Main Street Capital
MAIN
$5.9B
| $1.14M | ﹤0.01% |
+20,114
| New | +$1.14M |
|
342
Semtech
SMTC
$5.26B
| $1.12M | ﹤0.01% |
32,544
+13,414
| +70% | +$461K |
|
343
Transmedics
TMDX
$3.6B
| $1.12M | ﹤0.01% |
16,641
-11,505
| -41% | -$774K |
|
344
Insmed
INSM
$31B
| $1.1M | ﹤0.01% |
14,467
-4,248
| -23% | -$324K |
|
345
Yum! Brands
YUM
$41.1B
| $1.1M | ﹤0.01% |
+7,003
| New | +$1.1M |
|
346
Shake Shack
SHAK
$3.93B
| $1.1M | ﹤0.01% |
+12,481
| New | +$1.1M |
|
347
Synchrony
SYF
$28B
| $1.1M | ﹤0.01% |
20,764
-57,051
| -73% | -$3.02M |
|
348
Core Scientific
CORZ
$4.25B
| $1.09M | ﹤0.01% |
150,951
-596,002
| -80% | -$4.31M |
|
349
Cummins
CMI
$54.8B
| $1.09M | ﹤0.01% |
+3,483
| New | +$1.09M |
|
350
Elanco Animal Health
ELAN
$9.46B
| $1.09M | ﹤0.01% |
103,437
+58,998
| +133% | +$619K |
|