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 | |
|---|---|---|---|---|---|---|
376
MKS Inc. Common Stock
MKSI
$7.02B
| $701K | ﹤0.01% |
+7,325
| New | +$701K |
|
377
Canadian Solar
CSIQ
$748M
| $694K | ﹤0.01% |
56,700
+41,959
| +285% | +$514K |
|
378
Zebra Technologies
ZBRA
$16B
| $689K | ﹤0.01% |
+4,810
| New | +$689K |
|
379
United Therapeutics
UTHR
$18.1B
| $685K | ﹤0.01% |
+6,055
| New | +$685K |
|
380
Norfolk Southern
NSC
$62.3B
| $675K | ﹤0.01% |
4,475
+1,821
| +69% | +$275K |
|
381
OneSpan
OSPN
$583M
| $672K | ﹤0.01% |
34,227
+33,445
| +4,277% | +$657K |
|
382
Wayfair
W
$11.6B
| $672K | ﹤0.01% |
+5,659
| New | +$672K |
|
383
Select Water Solutions
WTTR
$881M
| $671K | ﹤0.01% |
46,214
+46,014
| +23,007% | +$668K |
|
|
LLL
384
DELISTED
L3 Technologies, Inc.
LLL
| $670K | ﹤0.01% |
3,488
-689
| -16% | -$132K |
|
385
British American Tobacco
BTI
$122B
| $667K | ﹤0.01% |
13,231
+8,658
| +189% | +$436K |
|
386
Huntington Ingalls Industries
HII
$10.6B
| $666K | ﹤0.01% |
+3,074
| New | +$666K |
|
387
Verastem
VSTM
$663M
| $666K | ﹤0.01% |
+8,075
| New | +$666K |
|
388
Bunge Global
BG
$16.9B
| $665K | ﹤0.01% |
9,548
-32,531
| -77% | -$2.27M |
|
389
BioMarin Pharmaceuticals
BMRN
$11.1B
| $663K | ﹤0.01% |
7,048
+883
| +14% | +$83.1K |
|
390
Hain Celestial
HAIN
$164M
| $660K | ﹤0.01% |
+22,163
| New | +$660K |
|
|
TIVO
391
DELISTED
Tivo Inc
TIVO
| $660K | ﹤0.01% |
49,095
+41,902
| +583% | +$563K |
|
392
Intellia Therapeutics
NTLA
$1.29B
| $657K | ﹤0.01% |
24,039
+3,162
| +15% | +$86.4K |
|
393
Upland Software
UPLD
$70.5M
| $653K | ﹤0.01% |
19,009
+18,909
| +18,909% | +$650K |
|
394
Cars.com
CARS
$835M
| $650K | ﹤0.01% |
+22,897
| New | +$650K |
|
395
Jack in the Box
JACK
$386M
| $650K | ﹤0.01% |
7,638
+1,620
| +27% | +$138K |
|
396
Stratasys
SSYS
$871M
| $646K | ﹤0.01% |
33,799
+24,297
| +256% | +$464K |
|
397
Ericsson
ERIC
$26.7B
| $642K | ﹤0.01% |
83,759
+62,817
| +300% | +$481K |
|
398
Hexcel
HXL
$5.16B
| $640K | ﹤0.01% |
+9,655
| New | +$640K |
|
|
ARRY
399
DELISTED
Array Biopharma Inc
ARRY
| $639K | ﹤0.01% |
38,087
+36,564
| +2,401% | +$613K |
|
400
Trinity Industries
TRN
$2.31B
| $636K | ﹤0.01% |
+25,810
| New | +$636K |
|