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 |
Apple
AAPL
|
$35.2M |
| 2 |
Micron Technology
MU
|
$32.9M |
| 3 |
Berkshire Hathaway Class B
BRK.B
|
$29.5M |
| 4 |
NVIDIA
NVDA
|
$22.9M |
| 5 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
$22M |
Top Sells
| 1 |
TWX
Time Warner Inc
TWX
|
$34.8M |
| 2 |
Amazon
AMZN
|
$33.4M |
| 3 |
Tesla
TSLA
|
$19.8M |
| 4 |
Netflix
NFLX
|
$17.7M |
| 5 |
TWTR
Twitter, Inc.
TWTR
|
$13.5M |
Sector Composition
| 1 | Technology | 20.43% |
| 2 | Consumer Discretionary | 15.24% |
| 3 | Communication Services | 12% |
| 4 | Financials | 10.18% |
| 5 | Industrials | 9.87% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
501
Garmin
GRMN
$45.7B
| $449K | ﹤0.01% |
+7,372
| New | +$449K |
|
|
TWOU
502
DELISTED
2U, Inc.
TWOU
| $449K | ﹤0.01% |
179
+104
| +139% | +$261K |
|
|
QIWI
503
DELISTED
QIWI PLC
QIWI
| $449K | ﹤0.01% |
28,520
+10,292
| +56% | +$162K |
|
504
Digimarc
DMRC
$181M
| $446K | ﹤0.01% |
16,666
+8,533
| +105% | +$228K |
|
505
Talos Energy
TALO
$1.65B
| $446K | ﹤0.01% |
+13,911
| New | +$446K |
|
506
Amneal Pharmaceuticals
AMRX
$3.02B
| $444K | ﹤0.01% |
+27,108
| New | +$444K |
|
507
Cintas
CTAS
$82.4B
| $441K | ﹤0.01% |
9,544
-12,772
| -57% | -$590K |
|
|
EDR
508
DELISTED
Education Realty Trust Inc
EDR
| $439K | ﹤0.01% |
+10,589
| New | +$439K |
|
|
CYOU
509
DELISTED
Changyou.com Limited American Depositary Share
CYOU
| $436K | ﹤0.01% |
26,171
+13,370
| +104% | +$223K |
|
|
CRCM
510
DELISTED
CARE.COM, INC.
CRCM
| $434K | ﹤0.01% |
20,816
+13,847
| +199% | +$289K |
|
511
PPL Corp
PPL
$26.6B
| $433K | ﹤0.01% |
+15,167
| New | +$433K |
|
512
Vale
VALE
$44.4B
| $426K | ﹤0.01% |
+33,293
| New | +$426K |
|
|
SONC
513
DELISTED
Sonic Corp
SONC
| $425K | ﹤0.01% |
+12,354
| New | +$425K |
|
514
United Parks & Resorts
PRKS
$2.99B
| $422K | ﹤0.01% |
19,343
-28,685
| -60% | -$626K |
|
|
EQM
515
DELISTED
EQM Midstream Partners, LP
EQM
| $422K | ﹤0.01% |
+8,187
| New | +$422K |
|
516
ING
ING
$71B
| $420K | ﹤0.01% |
29,352
+15,871
| +118% | +$227K |
|
517
Mondelez International
MDLZ
$79.9B
| $419K | ﹤0.01% |
+10,240
| New | +$419K |
|
|
DQ
518
Daqo New Energy
DQ
$1.96B
| $418K | ﹤0.01% |
58,855
-230
| -0.4% | -$1.63K |
|
519
The Greenbrier Companies
GBX
$1.46B
| $418K | ﹤0.01% |
7,936
+2,205
| +38% | +$116K |
|
520
Hilton Grand Vacations
HGV
$4.15B
| $415K | ﹤0.01% |
11,963
+8,680
| +264% | +$301K |
|
521
Q2 Holdings
QTWO
$4.92B
| $412K | ﹤0.01% |
+7,238
| New | +$412K |
|
522
Zillow
ZG
$20.5B
| $411K | ﹤0.01% |
6,888
+5,986
| +664% | +$357K |
|
523
Ligand Pharmaceuticals
LGND
$3.25B
| $410K | ﹤0.01% |
+3,174
| New | +$410K |
|
524
Gentherm
THRM
$1.1B
| $409K | ﹤0.01% |
+10,429
| New | +$409K |
|
|
TTOO
525
DELISTED
T2 Biosystems, Inc
TTOO
| $405K | ﹤0.01% |
+10
| New | +$405K |
|