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 | |
|---|---|---|---|---|---|---|
201
Arista Networks
ANET
$180B
| $2.46M | ﹤0.01% |
+24,044
| New | +$2.46M |
|
202
Blackstone
BX
$133B
| $2.43M | ﹤0.01% |
16,222
-66,115
| -80% | -$9.89M |
|
203
Cinemark Holdings
CNK
$2.98B
| $2.42M | ﹤0.01% |
+80,181
| New | +$2.42M |
|
204
QuantumScape
QS
$4.44B
| $2.41M | ﹤0.01% |
358,479
-268,770
| -43% | -$1.81M |
|
205
Hasbro
HAS
$11.2B
| $2.4M | ﹤0.01% |
+32,561
| New | +$2.4M |
|
206
Bitwise Bitcoin ETF
BITB
$4.29B
| $2.4M | ﹤0.01% |
41,000
+32,547
| +385% | +$1.91M |
|
207
Vanguard Real Estate ETF
VNQ
$34.7B
| $2.38M | ﹤0.01% |
+26,777
| New | +$2.38M |
|
208
Avantor
AVTR
$9.07B
| $2.38M | ﹤0.01% |
+176,909
| New | +$2.38M |
|
209
PPG Industries
PPG
$24.8B
| $2.38M | ﹤0.01% |
+20,932
| New | +$2.38M |
|
210
United Rentals
URI
$62.7B
| $2.27M | ﹤0.01% |
+3,010
| New | +$2.27M |
|
211
Semler Scientific
SMLR
$416M
| $2.25M | ﹤0.01% |
57,994
+46,337
| +398% | +$1.79M |
|
|
EXK
212
Endeavour Silver
EXK
$1.74B
| $2.22M | ﹤0.01% |
+451,500
| New | +$2.22M |
|
213
Wynn Resorts
WYNN
$12.6B
| $2.2M | ﹤0.01% |
23,488
-33,142
| -59% | -$3.1M |
|
214
The Mosaic Company
MOS
$10.3B
| $2.2M | ﹤0.01% |
60,217
+18,084
| +43% | +$659K |
|
215
Fastenal
FAST
$55.1B
| $2.19M | ﹤0.01% |
52,181
-5,831
| -10% | -$245K |
|
216
RB Global
RBA
$21.4B
| $2.19M | ﹤0.01% |
+20,635
| New | +$2.19M |
|
217
NextDecade
NEXT
$2.8B
| $2.17M | ﹤0.01% |
243,834
-185,488
| -43% | -$1.65M |
|
218
Transmedics
TMDX
$3.55B
| $2.16M | ﹤0.01% |
16,149
-492
| -3% | -$65.9K |
|
219
Stanley Black & Decker
SWK
$12.1B
| $2.15M | ﹤0.01% |
31,770
+5,020
| +19% | +$340K |
|
220
Eldorado Gold
EGO
$5.31B
| $2.14M | ﹤0.01% |
105,375
+49,512
| +89% | +$1.01M |
|
221
Harley-Davidson
HOG
$3.67B
| $2.14M | ﹤0.01% |
90,680
-10,471
| -10% | -$247K |
|
222
Intuitive Machines
LUNR
$1B
| $2.12M | ﹤0.01% |
195,433
-64,921
| -25% | -$706K |
|
223
Vanguard Long-Term Treasury ETF
VGLT
$10B
| $2.12M | ﹤0.01% |
37,837
+13,791
| +57% | +$774K |
|
224
Foot Locker
FL
$2.29B
| $2.12M | ﹤0.01% |
86,486
+38,129
| +79% | +$934K |
|
225
Archer Aviation
ACHR
$5.48B
| $2.11M | ﹤0.01% |
194,914
-357,327
| -65% | -$3.88M |
|