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 | |
|---|---|---|---|---|---|---|
4701
Ternium
TX
$6.63B
| – | – |
0
| – | – |
|
4702
TherapeuticsMD
TXMD
$12.7M
| – | – |
0
| – | – |
|
4703
Texas Instruments
TXN
$178B
| – | – |
0
| – | – |
|
4704
Textron
TXT
$14.2B
| – | – |
0
| – | – |
|
4705
Tyler Technologies
TYL
$24B
| – | – |
-287
| Closed | -$101K |
|
4706
Travelzoo
TZOO
$102M
| – | – |
-2
| Closed | – |
|
4707
Under Armour
UAA
$2.17B
| – | – |
-145,670
| Closed | -$1.38M |
|
4708
United States Antimony
UAMY
$536M
| $0 | ﹤0.01% |
2,700
+2,500
| +1,250% | – |
|
|
TECX
4709
Tectonic Therapeutic, Inc. Common Stock
TECX
$305M
| – | – |
-725
| Closed | – |
|
|
SVC
4710
Service Properties Trust
SVC
$456M
| – | – |
0
| – | – |
|