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 | |
|---|---|---|---|---|---|---|
626
Provident Bancorp
PVBC
$226M
| $405K | ﹤0.01% |
+48,967
| New | +$405K |
|
627
ITT
ITT
$13.6B
| $404K | ﹤0.01% |
+4,336
| New | +$404K |
|
628
Zai Lab
ZLAB
$3.16B
| $404K | ﹤0.01% |
+14,582
| New | +$404K |
|
|
SMAR
629
DELISTED
Smartsheet Inc.
SMAR
| $403K | ﹤0.01% |
+10,554
| New | +$403K |
|
630
Abercrombie & Fitch
ANF
$4.54B
| $397K | ﹤0.01% |
+10,539
| New | +$397K |
|
631
Fiverr
FVRR
$858M
| $396K | ﹤0.01% |
15,255
+1,188
| +8% | +$30.8K |
|
|
AIV
632
Aimco
AIV
$1.07B
| $395K | ﹤0.01% |
46,386
-121,018
| -72% | -$1.03M |
|
633
Boston Beer
SAM
$2.39B
| $395K | ﹤0.01% |
+1,283
| New | +$395K |
|
634
Getty Images
GETY
$772M
| $394K | ﹤0.01% |
80,772
-32,186
| -28% | -$157K |
|
635
Invesco Solar ETF
TAN
$728M
| $393K | ﹤0.01% |
5,510
-11,943
| -68% | -$852K |
|
636
Freshpet
FRPT
$2.61B
| $389K | ﹤0.01% |
+5,918
| New | +$389K |
|
637
Immunovant
IMVT
$2.82B
| $388K | ﹤0.01% |
20,506
+4,652
| +29% | +$88K |
|
638
WisdomTree Japan Hedged Equity Fund
DXJ
$3.81B
| $386K | ﹤0.01% |
+4,643
| New | +$386K |
|
639
Flywire
FLYW
$1.62B
| $385K | ﹤0.01% |
+12,405
| New | +$385K |
|
640
Repligen
RGEN
$6.76B
| $385K | ﹤0.01% |
+2,726
| New | +$385K |
|
641
CoreCivic
CXW
$2.18B
| $382K | ﹤0.01% |
+40,621
| New | +$382K |
|
642
Groupon
GRPN
$916M
| $380K | ﹤0.01% |
+64,335
| New | +$380K |
|
643
Insulet
PODD
$23.8B
| $380K | ﹤0.01% |
+1,318
| New | +$380K |
|
644
Rush Street Interactive
RSI
$2.01B
| $380K | ﹤0.01% |
121,975
+112,373
| +1,170% | +$350K |
|
645
Vipshop
VIPS
$8.85B
| $380K | ﹤0.01% |
+23,034
| New | +$380K |
|
646
CAVA Group
CAVA
$7.56B
| $379K | ﹤0.01% |
+9,256
| New | +$379K |
|
647
Alpha and Omega Semiconductor
AOSL
$858M
| $377K | ﹤0.01% |
+11,499
| New | +$377K |
|
648
Mitek Systems
MITK
$454M
| $374K | ﹤0.01% |
34,576
+27,381
| +381% | +$296K |
|
649
Ventas
VTR
$31.5B
| $373K | ﹤0.01% |
+7,901
| New | +$373K |
|
650
Gaming and Leisure Properties
GLPI
$13.6B
| $372K | ﹤0.01% |
+7,692
| New | +$372K |
|