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 | |
|---|---|---|---|---|---|---|
1026
Denison Mines
DNN
$2.13B
| $105K | ﹤0.01% |
84,762
-19,135
| -18% | -$23.7K |
|
1027
Perma-Fix Environmental Services
PESI
$168M
| $105K | ﹤0.01% |
9,573
-11,673
| -55% | -$128K |
|
1028
RBB Bancorp
RBB
$335M
| $105K | ﹤0.01% |
8,834
+8,830
| +220,750% | +$105K |
|
1029
Titan Machinery
TITN
$456M
| $105K | ﹤0.01% |
3,566
-250
| -7% | -$7.36K |
|
1030
Vertex Pharmaceuticals
VRTX
$101B
| $105K | ﹤0.01% |
300
-9,490
| -97% | -$3.32M |
|
|
SUM
1031
DELISTED
Summit Materials, Inc. Class A Common Stock
SUM
| $105K | ﹤0.01% |
+2,783
| New | +$105K |
|
1032
ProShares UltraShort Dow 30
DXD
$52.2M
| $104K | ﹤0.01% |
2,586
-1,508
| -37% | -$60.6K |
|
1033
Editas Medicine
EDIT
$242M
| $104K | ﹤0.01% |
12,656
+7,360
| +139% | +$60.5K |
|
1034
DTE Energy
DTE
$28.4B
| $103K | ﹤0.01% |
+941
| New | +$103K |
|
1035
iShares S&P GSCI Commodity-Indexed Trust
GSG
$996M
| $103K | ﹤0.01% |
5,331
-2,359
| -31% | -$45.6K |
|
1036
iShares US Energy ETF
IYE
$1.15B
| $103K | ﹤0.01% |
2,408
+173
| +8% | +$7.4K |
|
|
PLYA
1037
DELISTED
Playa Hotels & Resorts
PLYA
| $103K | ﹤0.01% |
12,724
-2,562
| -17% | -$20.7K |
|
1038
John Wiley & Sons Class A
WLY
$2.21B
| $103K | ﹤0.01% |
3,027
+2,997
| +9,990% | +$102K |
|
1039
Invesco KBW Bank ETF
KBWB
$4.98B
| $102K | ﹤0.01% |
2,504
-7,234
| -74% | -$295K |
|
1040
Collegium Pharmaceutical
COLL
$1.19B
| $101K | ﹤0.01% |
4,739
-12,744
| -73% | -$272K |
|
1041
AXT Inc
AXTI
$166M
| $100K | ﹤0.01% |
+29,277
| New | +$100K |
|
1042
Cadre Holdings
CDRE
$1.31B
| $100K | ﹤0.01% |
+4,600
| New | +$100K |
|
1043
Federal Signal
FSS
$7.66B
| $100K | ﹤0.01% |
+1,574
| New | +$100K |
|
1044
Anywhere Real Estate
HOUS
$788M
| $100K | ﹤0.01% |
15,113
+2,809
| +23% | +$18.6K |
|
1045
Newegg Commerce
NEGG
$906M
| $100K | ﹤0.01% |
+4,285
| New | +$100K |
|
1046
Domo
DOMO
$698M
| $99K | ﹤0.01% |
6,768
-657
| -9% | -$9.61K |
|
1047
Grab
GRAB
$24.1B
| $99K | ﹤0.01% |
29,039
-171,968
| -86% | -$586K |
|
|
HEES
1048
DELISTED
H&E Equipment Services
HEES
| $99K | ﹤0.01% |
+2,166
| New | +$99K |
|
1049
Silicon Motion
SIMO
$3.01B
| $99K | ﹤0.01% |
1,386
-19,186
| -93% | -$1.37M |
|
1050
Silicon Laboratories
SLAB
$4.4B
| $99K | ﹤0.01% |
+631
| New | +$99K |
|