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
|
$80M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
$45.3M |
| 3 |
Alphabet (Google) Class C
GOOG
|
$38.8M |
| 4 |
Amazon
AMZN
|
$38.6M |
| 5 |
Tesla
TSLA
|
$36M |
Top Sells
| 1 |
Alibaba
BABA
|
$46.4M |
| 2 |
Boeing
BA
|
$29.8M |
| 3 |
SPDR Gold Trust
GLD
|
$18.2M |
| 4 |
Biogen
BIIB
|
$15.8M |
| 5 |
NVIDIA
NVDA
|
$14.3M |
Sector Composition
| 1 | Technology | 22.73% |
| 2 | Consumer Discretionary | 17.54% |
| 3 | Communication Services | 10.03% |
| 4 | Healthcare | 9.29% |
| 5 | Industrials | 5.63% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
501
Sonos
SONO
$1.78B
| $434K | ﹤0.01% |
+27,831
| New | +$434K |
|
|
REV
502
DELISTED
Revlon, Inc.
REV
| $427K | ﹤0.01% |
19,966
+13,036
| +188% | +$279K |
|
503
Direxion Daily S&P Biotech Bear 3X Shares
LABD
$56.8M
| $422K | ﹤0.01% |
1,710
+766
| +81% | +$189K |
|
504
Teck Resources
TECK
$16.8B
| $420K | ﹤0.01% |
24,214
+24,014
| +12,007% | +$417K |
|
|
ISEE
505
DELISTED
IVERIC bio, Inc. Common Stock
ISEE
| $419K | ﹤0.01% |
+48,860
| New | +$419K |
|
|
KL
506
DELISTED
Kirkland Lake Gold Ltd Ordinary
KL
| $418K | ﹤0.01% |
+9,489
| New | +$418K |
|
507
ProShares Ultra Technology
ROM
$770M
| $416K | ﹤0.01% |
20,968
+14,672
| +233% | +$291K |
|
508
Charles River Laboratories
CRL
$8.07B
| $415K | ﹤0.01% |
2,721
+1,210
| +80% | +$185K |
|
509
Compass Diversified
CODI
$548M
| $414K | ﹤0.01% |
16,690
+14,233
| +579% | +$353K |
|
|
DFS
510
DELISTED
Discover Financial Services
DFS
| $414K | ﹤0.01% |
4,891
-636
| -12% | -$53.8K |
|
511
First Solar
FSLR
$22B
| $414K | ﹤0.01% |
+7,401
| New | +$414K |
|
512
Casey's General Stores
CASY
$18.8B
| $411K | ﹤0.01% |
+2,588
| New | +$411K |
|
513
KBR
KBR
$6.4B
| $409K | ﹤0.01% |
+13,426
| New | +$409K |
|
514
UroGen Pharma
URGN
$873M
| $409K | ﹤0.01% |
12,262
+5,504
| +81% | +$184K |
|
|
EIGI
515
DELISTED
Endurance International Group Holdings, Inc.
EIGI
| $409K | ﹤0.01% |
87,180
+70,800
| +432% | +$332K |
|
516
Danaher
DHR
$143B
| $408K | ﹤0.01% |
+3,005
| New | +$408K |
|
517
Chewy
CHWY
$17.5B
| $403K | ﹤0.01% |
13,905
+2,285
| +20% | +$66.2K |
|
518
Gold Fields
GFI
$30.8B
| $403K | ﹤0.01% |
61,168
-56,381
| -48% | -$371K |
|
519
Vertex Pharmaceuticals
VRTX
$102B
| $402K | ﹤0.01% |
+1,838
| New | +$402K |
|
|
RDFN
520
DELISTED
Redfin
RDFN
| $400K | ﹤0.01% |
18,952
+170
| +0.9% | +$3.59K |
|
|
PEGI
521
DELISTED
Pattern Energy Group Inc. Class A
PEGI
| $398K | ﹤0.01% |
+14,892
| New | +$398K |
|
|
TECD
522
DELISTED
Tech Data Corp
TECD
| $394K | ﹤0.01% |
+2,750
| New | +$394K |
|
523
Elastic
ESTC
$9.21B
| $390K | ﹤0.01% |
6,072
+5,200
| +596% | +$334K |
|
524
Enphase Energy
ENPH
$5.18B
| $389K | ﹤0.01% |
+14,921
| New | +$389K |
|
525
Sherwin-Williams
SHW
$92.9B
| $389K | ﹤0.01% |
+2,004
| New | +$389K |
|