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 | |
|---|---|---|---|---|---|---|
501
Consolidated Edison
ED
$35B
| $802K | ﹤0.01% |
8,969
+5,596
| +166% | +$500K |
|
502
Domo
DOMO
$643M
| $801K | ﹤0.01% |
103,875
+73
| +0.1% | +$563 |
|
503
Philips
PHG
$26.9B
| $801K | ﹤0.01% |
+33,158
| New | +$801K |
|
504
Masimo
MASI
$7.92B
| $800K | ﹤0.01% |
6,360
+765
| +14% | +$96.2K |
|
|
SWTX
505
DELISTED
SpringWorks Therapeutics
SWTX
| $794K | ﹤0.01% |
21,093
-2,498
| -11% | -$94K |
|
506
Canadian National Railway
CNI
$57.7B
| $792K | ﹤0.01% |
6,709
+6,581
| +5,141% | +$777K |
|
507
Wells Fargo
WFC
$257B
| $785K | ﹤0.01% |
+13,222
| New | +$785K |
|
|
AMED
508
DELISTED
Amedisys
AMED
| $774K | ﹤0.01% |
+8,433
| New | +$774K |
|
509
American International
AIG
$43.2B
| $773K | ﹤0.01% |
10,420
-72,372
| -87% | -$5.37M |
|
510
Molina Healthcare
MOH
$9.71B
| $772K | ﹤0.01% |
+2,598
| New | +$772K |
|
511
Medifast
MED
$152M
| $771K | ﹤0.01% |
+35,339
| New | +$771K |
|
512
Hertz
HTZ
$1.82B
| $770K | ﹤0.01% |
218,288
+214,838
| +6,227% | +$758K |
|
513
Acadia Pharmaceuticals
ACAD
$4.02B
| $765K | ﹤0.01% |
47,110
-10,266
| -18% | -$167K |
|
514
MarketAxess Holdings
MKTX
$6.9B
| $765K | ﹤0.01% |
+3,816
| New | +$765K |
|
515
WEC Energy
WEC
$35.2B
| $765K | ﹤0.01% |
9,753
-4,216
| -30% | -$331K |
|
516
Denison Mines
DNN
$2.2B
| $763K | ﹤0.01% |
383,912
+220,559
| +135% | +$438K |
|
517
Leonardo DRS
DRS
$10.9B
| $757K | ﹤0.01% |
29,681
+14,309
| +93% | +$365K |
|
518
United States Natural Gas Fund
UNG
$597M
| $756K | ﹤0.01% |
43,410
-97,201
| -69% | -$1.69M |
|
519
Carriage Services
CSV
$652M
| $753K | ﹤0.01% |
28,076
+27,151
| +2,935% | +$728K |
|
|
HIMX
520
Himax Technologies
HIMX
$1.47B
| $753K | ﹤0.01% |
94,876
-14,832
| -14% | -$118K |
|
521
American Superconductor
AMSC
$2.32B
| $748K | ﹤0.01% |
32,021
-21,641
| -40% | -$506K |
|
522
Huntington Ingalls Industries
HII
$10.7B
| $746K | ﹤0.01% |
+3,030
| New | +$746K |
|
523
Hexcel
HXL
$4.93B
| $744K | ﹤0.01% |
11,920
+8,867
| +290% | +$553K |
|
524
Amicus Therapeutics
FOLD
$2.45B
| $739K | ﹤0.01% |
74,595
+49,610
| +199% | +$491K |
|
525
Wendy's
WEN
$1.87B
| $739K | ﹤0.01% |
+43,594
| New | +$739K |
|