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
|
+$60M |
| 2 |
Microsoft
MSFT
|
+$58.6M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$52.5M |
| 4 |
PayPal
PYPL
|
+$40.9M |
| 5 |
Netflix
NFLX
|
+$29.7M |
Top Sells
| 1 |
Apple
AAPL
|
+$48.7M |
| 2 |
Walmart
WMT
|
+$45.2M |
| 3 |
Adobe
ADBE
|
+$40.6M |
| 4 |
VanEck Oil Services ETF
OIH
|
+$34.2M |
| 5 |
Enphase Energy
ENPH
|
+$27.2M |
Sector Composition
| 1 | Technology | 21.17% |
| 2 | Healthcare | 10.87% |
| 3 | Consumer Discretionary | 10.73% |
| 4 | Communication Services | 10.55% |
| 5 | Financials | 7.54% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
301
Jacobs Solutions
J
$17.2B
| $1.39M | ﹤0.01% |
+14,085
| New | +$1.39M |
|
302
Revolve Group
RVLV
$1.68B
| $1.38M | ﹤0.01% |
+84,441
| New | +$1.38M |
|
303
Generac Holdings
GNRC
$10.7B
| $1.38M | ﹤0.01% |
9,280
+3,797
| +69% | +$566K |
|
304
Vital Energy
VTLE
$606M
| $1.37M | ﹤0.01% |
30,270
+11,216
| +59% | +$506K |
|
305
Thomson Reuters
TRI
$79.2B
| $1.37M | ﹤0.01% |
10,123
+8,526
| +534% | +$1.15M |
|
306
Algoma Steel
ASTL
$491M
| $1.35M | ﹤0.01% |
189,747
+67,030
| +55% | +$476K |
|
307
Allegiant Air
ALGT
$1.11B
| $1.34M | ﹤0.01% |
10,642
+8,195
| +335% | +$1.03M |
|
308
Antero Resources
AR
$9.94B
| $1.34M | ﹤0.01% |
58,306
-76,837
| -57% | -$1.77M |
|
309
iShares Expanded Tech-Software Sector ETF
IGV
$10.1B
| $1.32M | ﹤0.01% |
19,105
+18,105
| +1,811% | +$1.25M |
|
310
SiTime
SITM
$6.43B
| $1.32M | ﹤0.01% |
+11,199
| New | +$1.32M |
|
311
Sibanye-Stillwater
SBSW
$6.04B
| $1.32M | ﹤0.01% |
210,786
-86,102
| -29% | -$537K |
|
312
Match Group
MTCH
$9.19B
| $1.3M | ﹤0.01% |
+31,150
| New | +$1.3M |
|
|
LSXMA
313
DELISTED
Liberty Media Corporation Series A Liberty SiriusXM Common Stock
LSXMA
| $1.3M | ﹤0.01% |
54,049
+36,506
| +208% | +$879K |
|
314
Progressive
PGR
$143B
| $1.29M | ﹤0.01% |
+9,760
| New | +$1.29M |
|
315
Kenvue
KVUE
$36.2B
| $1.29M | ﹤0.01% |
+48,650
| New | +$1.29M |
|
316
Five Below
FIVE
$7.88B
| $1.28M | ﹤0.01% |
6,531
-506
| -7% | -$99.4K |
|
317
Coupang
CPNG
$58.9B
| $1.28M | ﹤0.01% |
+73,712
| New | +$1.28M |
|
318
Sea Limited
SE
$114B
| $1.28M | ﹤0.01% |
22,083
+20,483
| +1,280% | +$1.19M |
|
|
AY
319
DELISTED
Atlantica Sustainable Infrastructure plc Ordinary Shares
AY
| $1.28M | ﹤0.01% |
54,646
-44,173
| -45% | -$1.03M |
|
320
ArcelorMittal
MT
$25.7B
| $1.28M | ﹤0.01% |
+46,814
| New | +$1.28M |
|
321
Carriage Services
CSV
$669M
| $1.27M | ﹤0.01% |
39,141
+34,384
| +723% | +$1.12M |
|
322
Glaukos
GKOS
$5.21B
| $1.27M | ﹤0.01% |
17,781
+12,143
| +215% | +$865K |
|
323
3D Systems Corporation
DDD
$269M
| $1.26M | ﹤0.01% |
127,374
+109,613
| +617% | +$1.09M |
|
|
EH
324
EHang Holdings
EH
$1.18B
| $1.24M | ﹤0.01% |
81,757
+57,527
| +237% | +$873K |
|
325
Waters Corp
WAT
$17.9B
| $1.24M | ﹤0.01% |
4,644
+4,126
| +797% | +$1.1M |
|