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
|
+$60M |
| 2 |
Microsoft
MSFT
|
+$58.6M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$52.5M |
| 4 |
PayPal
PYPL
|
+$40.9M |
| 5 |
Netflix
NFLX
|
+$29.7M |
Top Sells
| 1 |
Apple
AAPL
|
+$48.7M |
| 2 |
Walmart
WMT
|
+$45.2M |
| 3 |
Adobe
ADBE
|
+$40.6M |
| 4 |
VanEck Oil Services ETF
OIH
|
+$34.2M |
| 5 |
Enphase Energy
ENPH
|
+$27.2M |
Sector Composition
| 1 | Technology | 21.17% |
| 2 | Healthcare | 10.87% |
| 3 | Consumer Discretionary | 10.73% |
| 4 | Communication Services | 10.55% |
| 5 | Financials | 7.54% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
651
SPDR Portfolio S&P 500 ETF
SPLG
$85.1B
| $371K | ﹤0.01% |
+7,133
| New | +$371K |
|
652
OneSpan
OSPN
$578M
| $367K | ﹤0.01% |
+24,782
| New | +$367K |
|
653
Playtika
PLTK
$1.39B
| $365K | ﹤0.01% |
31,532
+19,585
| +164% | +$227K |
|
654
Star Bulk Carriers
SBLK
$2.23B
| $365K | ﹤0.01% |
20,627
+1,844
| +10% | +$32.6K |
|
655
Okta
OKTA
$15.9B
| $361K | ﹤0.01% |
5,217
-30,825
| -86% | -$2.13M |
|
|
VTNR
656
DELISTED
Vertex Energy, Inc
VTNR
| $361K | ﹤0.01% |
+57,891
| New | +$361K |
|
657
Greif
GEF
$3.54B
| $360K | ﹤0.01% |
+5,230
| New | +$360K |
|
658
Sunoco
SUN
$6.9B
| $360K | ﹤0.01% |
8,277
+819
| +11% | +$35.6K |
|
|
BKI
659
DELISTED
Black Knight, Inc. Common Stock
BKI
| $359K | ﹤0.01% |
6,020
+5,920
| +5,920% | +$353K |
|
660
Terns Pharmaceuticals
TERN
$654M
| $357K | ﹤0.01% |
+40,885
| New | +$357K |
|
|
EMBK
661
DELISTED
Embark Technology, Inc. Common Stock
EMBK
| $357K | ﹤0.01% |
124,983
+55,650
| +80% | +$159K |
|
662
Oshkosh
OSK
$8.75B
| $356K | ﹤0.01% |
+4,118
| New | +$356K |
|
663
Copa Holdings
CPA
$4.73B
| $355K | ﹤0.01% |
+3,214
| New | +$355K |
|
664
UroGen Pharma
URGN
$884M
| $355K | ﹤0.01% |
34,339
-622
| -2% | -$6.43K |
|
665
Roundhill Generative AI & Technology ETF
CHAT
$587M
| $354K | ﹤0.01% |
+12,327
| New | +$354K |
|
666
Fortuna Silver Mines
FSM
$2.42B
| $354K | ﹤0.01% |
109,484
-20,244
| -16% | -$65.5K |
|
667
Phathom Pharmaceuticals
PHAT
$874M
| $348K | ﹤0.01% |
24,326
-5,085
| -17% | -$72.7K |
|
668
ProShares Ultra QQQ
QLD
$9.15B
| $347K | ﹤0.01% |
+5,398
| New | +$347K |
|
669
Target Hospitality
TH
$876M
| $347K | ﹤0.01% |
+25,869
| New | +$347K |
|
|
SAVE
670
DELISTED
Spirit Airlines, Inc.
SAVE
| $345K | ﹤0.01% |
+20,114
| New | +$345K |
|
671
Liberty Global Class A
LBTYA
$3.93B
| $343K | ﹤0.01% |
20,403
-48,674
| -70% | -$818K |
|
672
Alkami Technology
ALKT
$2.62B
| $340K | ﹤0.01% |
20,761
+3,055
| +17% | +$50K |
|
673
Wendy's
WEN
$1.87B
| $339K | ﹤0.01% |
+15,615
| New | +$339K |
|
|
GOOS
674
Canada Goose Holdings
GOOS
$1.42B
| $338K | ﹤0.01% |
+19,002
| New | +$338K |
|
|
NETI
675
DELISTED
Eneti Inc.
NETI
| $336K | ﹤0.01% |
+27,771
| New | +$336K |
|