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 | |
|---|---|---|---|---|---|---|
1026
National Grid
NGG
$70.5B
| $153K | ﹤0.01% |
2,057
-18,097
| -90% | -$1.35M |
|
1027
Photronics
PLAB
$1.34B
| $153K | ﹤0.01% |
+8,156
| New | +$153K |
|
|
MRX
1028
Marex Group
MRX
$2.48B
| $153K | ﹤0.01% |
+3,888
| New | +$153K |
|
1029
Expensify
EXFY
$182M
| $152K | ﹤0.01% |
58,962
+43,841
| +290% | +$113K |
|
1030
Applovin
APP
$193B
| $150K | ﹤0.01% |
+430
| New | +$150K |
|
1031
Haemonetics
HAE
$2.58B
| $150K | ﹤0.01% |
+2,012
| New | +$150K |
|
1032
iShares Russell Mid-Cap Growth ETF
IWP
$20.7B
| $150K | ﹤0.01% |
1,082
-758
| -41% | -$105K |
|
1033
PSQ Holdings
PSQH
$90.9M
| $149K | ﹤0.01% |
72,745
+56,975
| +361% | +$117K |
|
1034
QuinStreet
QNST
$939M
| $149K | ﹤0.01% |
9,262
+813
| +10% | +$13.1K |
|
1035
Invesco CurrencyShares Swiss Franc Trust
FXF
$378M
| $148K | ﹤0.01% |
+1,328
| New | +$148K |
|
1036
SPDR Bloomberg 1-3 Month T-Bill ETF
BIL
$41.8B
| $147K | ﹤0.01% |
1,608
-2,380
| -60% | -$218K |
|
1037
Cullinan Oncology
CGEM
$391M
| $147K | ﹤0.01% |
19,557
+15,959
| +444% | +$120K |
|
1038
Evergy
EVRG
$16.6B
| $147K | ﹤0.01% |
+2,140
| New | +$147K |
|
1039
New Oriental
EDU
$8.93B
| $146K | ﹤0.01% |
2,715
-1,715
| -39% | -$92.2K |
|
|
NXDR
1040
Nextdoor Holdings
NXDR
$794M
| $146K | ﹤0.01% |
88,114
+81,302
| +1,194% | +$135K |
|
1041
ProShares UltraPro S&P 500
UPRO
$4.73B
| $146K | ﹤0.01% |
1,599
-28,961
| -95% | -$2.64M |
|
1042
Xperi
XPER
$281M
| $146K | ﹤0.01% |
18,472
+10,871
| +143% | +$85.9K |
|
1043
Pacific Biosciences
PACB
$378M
| $145K | ﹤0.01% |
117,525
+116,763
| +15,323% | +$144K |
|
1044
Capital One
COF
$143B
| $144K | ﹤0.01% |
+680
| New | +$144K |
|
1045
Janux Therapeutics
JANX
$1.51B
| $144K | ﹤0.01% |
6,248
+3,061
| +96% | +$70.5K |
|
1046
Madison Square Garden
MSGE
$2.06B
| $144K | ﹤0.01% |
3,620
+2,723
| +304% | +$108K |
|
1047
Pultegroup
PHM
$27.4B
| $144K | ﹤0.01% |
1,369
-3,924
| -74% | -$413K |
|
1048
Playboy, Inc. Common Stock
PLBY
$188M
| $144K | ﹤0.01% |
89,451
-15,433
| -15% | -$24.8K |
|
1049
Triple Flag Precious Metals
TFPM
$5.96B
| $144K | ﹤0.01% |
6,081
+3,967
| +188% | +$93.9K |
|
1050
Teucrium Corn Fund
CORN
$48.8M
| $143K | ﹤0.01% |
8,113
-1,876
| -19% | -$33.1K |
|