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 | |
|---|---|---|---|---|---|---|
351
Universal Display
OLED
$6.64B
| $1.11M | ﹤0.01% |
+7,716
| New | +$1.11M |
|
352
Weyerhaeuser
WY
$18.2B
| $1.11M | ﹤0.01% |
33,152
-52,385
| -61% | -$1.75M |
|
353
Sysco
SYY
$38.7B
| $1.11M | ﹤0.01% |
14,916
+10,901
| +272% | +$808K |
|
354
UBS Group
UBS
$127B
| $1.11M | ﹤0.01% |
54,545
+16,343
| +43% | +$331K |
|
355
Western Union
WU
$2.79B
| $1.11M | ﹤0.01% |
94,220
+18,686
| +25% | +$219K |
|
356
Elevance Health
ELV
$71B
| $1.1M | ﹤0.01% |
+2,483
| New | +$1.1M |
|
357
Marqeta
MQ
$2.69B
| $1.1M | ﹤0.01% |
226,447
-214,263
| -49% | -$1.04M |
|
358
AdaptHealth
AHCO
$1.25B
| $1.1M | ﹤0.01% |
90,185
+73,373
| +436% | +$893K |
|
359
Rio Tinto
RIO
$101B
| $1.08M | ﹤0.01% |
16,965
-37,208
| -69% | -$2.38M |
|
|
ABCM
360
DELISTED
Abcam plc American Depositary Shares
ABCM
| $1.06M | ﹤0.01% |
43,419
+40,625
| +1,454% | +$994K |
|
361
Myriad Genetics
MYGN
$649M
| $1.05M | ﹤0.01% |
45,387
+28,685
| +172% | +$665K |
|
362
DraftKings
DKNG
$22.8B
| $1.05M | ﹤0.01% |
39,535
-479,468
| -92% | -$12.7M |
|
363
Peloton Interactive
PTON
$3.24B
| $1.05M | ﹤0.01% |
+136,627
| New | +$1.05M |
|
|
HCP
364
DELISTED
HashiCorp, Inc. Class A Common Stock
HCP
| $1.05M | ﹤0.01% |
40,108
-1,536
| -4% | -$40.2K |
|
365
iHeartMedia
IHRT
$339M
| $1.04M | ﹤0.01% |
+284,652
| New | +$1.04M |
|
366
Applovin
APP
$189B
| $1.04M | ﹤0.01% |
+40,239
| New | +$1.04M |
|
367
Axsome Therapeutics
AXSM
$6.27B
| $1.03M | ﹤0.01% |
14,341
+13,781
| +2,461% | +$990K |
|
368
Rambus
RMBS
$8.02B
| $1.02M | ﹤0.01% |
15,831
+11,240
| +245% | +$721K |
|
369
Innoviz Technologies
INVZ
$375M
| $1.01M | ﹤0.01% |
355,430
+44,179
| +14% | +$125K |
|
370
Vertiv
VRT
$48B
| $1.01M | ﹤0.01% |
40,591
-7,286
| -15% | -$180K |
|
371
Exact Sciences
EXAS
$10.5B
| $999K | ﹤0.01% |
10,643
+10,343
| +3,448% | +$971K |
|
372
ResMed
RMD
$40.9B
| $998K | ﹤0.01% |
+4,572
| New | +$998K |
|
373
Morgan Stanley
MS
$243B
| $997K | ﹤0.01% |
+11,678
| New | +$997K |
|
|
MRNS
374
DELISTED
Marinus Pharmaceuticals, Inc
MRNS
| $996K | ﹤0.01% |
91,735
-19,182
| -17% | -$208K |
|
375
JB Hunt Transport Services
JBHT
$13.6B
| $995K | ﹤0.01% |
5,500
-5,387
| -49% | -$975K |
|