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
|
+$114M |
| 2 |
Citigroup
C
|
+$77M |
| 3 |
Broadcom
AVGO
|
+$53M |
| 4 |
Pinduoduo
PDD
|
+$49.7M |
| 5 |
Intel
INTC
|
+$44.5M |
Top Sells
| 1 |
Energy Select Sector SPDR Fund
XLE
|
+$92.5M |
| 2 |
Pfizer
PFE
|
+$67.5M |
| 3 |
Boeing
BA
|
+$66.7M |
| 4 |
Direxion Daily Semiconductor Bull 3X Shares
SOXL
|
+$44.9M |
| 5 |
PayPal
PYPL
|
+$44.4M |
Sector Composition
| 1 | Technology | 27.91% |
| 2 | Consumer Discretionary | 14.92% |
| 3 | Healthcare | 10.74% |
| 4 | Financials | 10.11% |
| 5 | Materials | 6.23% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
CHX
826
DELISTED
ChampionX
CHX
| $271K | ﹤0.01% |
+8,172
| New | +$271K |
|
827
Reinsurance Group of America
RGA
$12.9B
| $268K | ﹤0.01% |
+1,309
| New | +$268K |
|
828
Dyne Therapeutics
DYN
$1.88B
| $267K | ﹤0.01% |
7,583
-42,123
| -85% | -$1.48M |
|
829
Full Truck Alliance
YMM
$14.4B
| $267K | ﹤0.01% |
+33,214
| New | +$267K |
|
830
Destination XL Group
DXLG
$74.9M
| $266K | ﹤0.01% |
73,207
+72,873
| +21,818% | +$265K |
|
831
Becton Dickinson
BDX
$54.6B
| $265K | ﹤0.01% |
+1,137
| New | +$265K |
|
832
Upwork
UPWK
$2.17B
| $265K | ﹤0.01% |
24,692
+13,528
| +121% | +$145K |
|
833
Glaukos
GKOS
$5.02B
| $264K | ﹤0.01% |
+2,236
| New | +$264K |
|
834
Ceco Environmental
CECO
$1.68B
| $263K | ﹤0.01% |
9,125
+7,372
| +421% | +$212K |
|
835
Invesco S&P 500 Top 50 ETF
XLG
$10.6B
| $263K | ﹤0.01% |
5,749
+5,640
| +5,174% | +$258K |
|
836
JELD-WEN Holding
JELD
$566M
| $261K | ﹤0.01% |
19,388
-998
| -5% | -$13.4K |
|
837
LegalZoom.com
LZ
$1.9B
| $261K | ﹤0.01% |
+31,175
| New | +$261K |
|
838
Direxion Daily AAPL Bull 2X Shares
AAPU
$190M
| $260K | ﹤0.01% |
7,994
+7,443
| +1,351% | +$242K |
|
839
Genpact
G
$7.55B
| $259K | ﹤0.01% |
+8,066
| New | +$259K |
|
840
MaxLinear
MXL
$1.4B
| $259K | ﹤0.01% |
12,886
+4,119
| +47% | +$82.8K |
|
841
ProShares UltraPro S&P 500
UPRO
$4.73B
| $259K | ﹤0.01% |
+3,383
| New | +$259K |
|
842
Direxion Daily Gold Miners Index Bull 2X Shares
NUGT
$928M
| $254K | ﹤0.01% |
6,778
-86,341
| -93% | -$3.24M |
|
843
Douglas Emmett
DEI
$2.81B
| $253K | ﹤0.01% |
19,052
+4,427
| +30% | +$58.8K |
|
844
Tenable Holdings
TENB
$3.7B
| $253K | ﹤0.01% |
5,809
+1,377
| +31% | +$60K |
|
845
Amplify Energy
AMPY
$161M
| $251K | ﹤0.01% |
+37,111
| New | +$251K |
|
846
Cinemark Holdings
CNK
$3.24B
| $251K | ﹤0.01% |
+11,623
| New | +$251K |
|
847
Dine Brands
DIN
$372M
| $251K | ﹤0.01% |
6,940
+5,114
| +280% | +$185K |
|
848
LifeMD
LFMD
$279M
| $251K | ﹤0.01% |
+36,639
| New | +$251K |
|
849
Viasat
VSAT
$4.28B
| $249K | ﹤0.01% |
+19,638
| New | +$249K |
|
850
Westlake Corp
WLK
$11.5B
| $249K | ﹤0.01% |
+1,722
| New | +$249K |
|