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 | |
|---|---|---|---|---|---|---|
|
BPMC
626
DELISTED
Blueprint Medicines
BPMC
| $284K | ﹤0.01% |
+4,484
| New | +$284K |
|
627
Direxion Daily MSCI India Bull 2X Shares
INDL
$66.3M
| $284K | ﹤0.01% |
3,853
+2,939
| +322% | +$217K |
|
|
ALEX
628
Alexander & Baldwin
ALEX
$1.41B
| $283K | ﹤0.01% |
12,077
+10,821
| +862% | +$254K |
|
629
BWX Technologies
BWXT
$15B
| $283K | ﹤0.01% |
+4,557
| New | +$283K |
|
630
DuPont de Nemours
DD
$32.6B
| $283K | ﹤0.01% |
2,131
-24,865
| -92% | -$3.3M |
|
631
Highwoods Properties
HIW
$3.44B
| $282K | ﹤0.01% |
5,568
-1,457
| -21% | -$73.8K |
|
632
VanEck Semiconductor ETF
SMH
$27.3B
| $282K | ﹤0.01% |
5,510
-34,820
| -86% | -$1.78M |
|
|
IMGN
633
DELISTED
Immunogen Inc
IMGN
| $282K | ﹤0.01% |
+29,076
| New | +$282K |
|
|
MDP
634
DELISTED
Meredith Corporation
MDP
| $282K | ﹤0.01% |
5,539
-17,624
| -76% | -$897K |
|
635
Global X MSCI Greece ETF
GREK
$303M
| $280K | ﹤0.01% |
10,230
+8,560
| +513% | +$234K |
|
636
iShares 1-3 Year International Treasury Bond ETF
IGOV
$1.12B
| $280K | ﹤0.01% |
+5,691
| New | +$280K |
|
637
Trinseo
TSE
$88.1M
| $280K | ﹤0.01% |
+3,956
| New | +$280K |
|
638
Huazhu Hotels Group
HTHT
$11.5B
| $279K | ﹤0.01% |
+6,663
| New | +$279K |
|
639
Newell Brands
NWL
$2.68B
| $279K | ﹤0.01% |
+10,856
| New | +$279K |
|
|
STI
640
DELISTED
SunTrust Banks, Inc.
STI
| $279K | ﹤0.01% |
4,228
+1,919
| +83% | +$127K |
|
641
Brady Corp
BRC
$3.86B
| $273K | ﹤0.01% |
+7,096
| New | +$273K |
|
642
iShares MSCI Saudi Arabia ETF
KSA
$577M
| $273K | ﹤0.01% |
+8,720
| New | +$273K |
|
|
SIX
643
DELISTED
Six Flags Entertainment Corp.
SIX
| $272K | ﹤0.01% |
3,885
+2,990
| +334% | +$209K |
|
644
Bankunited
BKU
$2.93B
| $271K | ﹤0.01% |
6,643
+6,353
| +2,191% | +$259K |
|
645
SL Green Realty
SLG
$4.4B
| $271K | ﹤0.01% |
+2,785
| New | +$271K |
|
646
Insulet
PODD
$24.5B
| $270K | ﹤0.01% |
+3,153
| New | +$270K |
|
647
American Superconductor
AMSC
$2.21B
| $269K | ﹤0.01% |
38,456
+19,245
| +100% | +$135K |
|
648
Power Integrations
POWI
$2.52B
| $269K | ﹤0.01% |
+7,374
| New | +$269K |
|
|
SRCL
649
DELISTED
Stericycle Inc
SRCL
| $269K | ﹤0.01% |
+4,122
| New | +$269K |
|
|
DFS
650
DELISTED
Discover Financial Services
DFS
| $268K | ﹤0.01% |
3,813
+438
| +13% | +$30.8K |
|