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
|
+$586M |
| 2 |
Strategy Inc Common Stock Class A
MSTR
|
+$82.5M |
| 3 |
Intel
INTC
|
+$40.4M |
| 4 |
Invesco QQQ Trust
QQQ
|
+$39.4M |
| 5 |
Uber
UBER
|
+$36.3M |
Top Sells
| 1 |
NVIDIA
NVDA
|
+$130M |
| 2 |
Pinduoduo
PDD
|
+$95.7M |
| 3 |
Boeing
BA
|
+$56.2M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$40.7M |
| 5 |
Microsoft
MSFT
|
+$40.5M |
Sector Composition
| 1 | Technology | 34.29% |
| 2 | Consumer Discretionary | 11.38% |
| 3 | Healthcare | 9.65% |
| 4 | Financials | 6.33% |
| 5 | Communication Services | 5.52% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
851
SPDR Euro Stoxx 50 ETF
FEZ
$4.55B
| $262K | ﹤0.01% |
+5,450
| New | +$262K |
|
852
Xylem
XYL
$33.5B
| $262K | ﹤0.01% |
+2,261
| New | +$262K |
|
853
Dorian LPG
LPG
$1.35B
| $261K | ﹤0.01% |
+10,721
| New | +$261K |
|
854
Intercontinental Exchange
ICE
$98.5B
| $260K | ﹤0.01% |
+1,745
| New | +$260K |
|
855
ProShares UltraShort Euro
EUO
$33.6M
| $258K | ﹤0.01% |
7,392
+7,385
| +105,500% | +$258K |
|
856
Cardlytics
CDLX
$52.3M
| $257K | ﹤0.01% |
69,479
+51,982
| +297% | +$192K |
|
857
Vanguard FTSE Europe ETF
VGK
$27B
| $257K | ﹤0.01% |
+4,060
| New | +$257K |
|
|
HUYA
858
Huya Inc
HUYA
$756M
| $256K | ﹤0.01% |
83,616
+74,276
| +795% | +$227K |
|
859
Shoals Technologies Group
SHLS
$1.14B
| $256K | ﹤0.01% |
46,381
-18,730
| -29% | -$103K |
|
860
Dave Inc
DAVE
$2.85B
| $255K | ﹤0.01% |
2,944
+2,477
| +530% | +$215K |
|
861
iShares Global Clean Energy ETF
ICLN
$1.59B
| $255K | ﹤0.01% |
22,456
-73,665
| -77% | -$837K |
|
862
Direxion Daily NVDA Bull 2X Shares
NVDU
$694M
| $255K | ﹤0.01% |
2,727
+874
| +47% | +$81.7K |
|
863
ScottsMiracle-Gro
SMG
$3.48B
| $255K | ﹤0.01% |
+3,845
| New | +$255K |
|
864
Westlake Corp
WLK
$11.1B
| $255K | ﹤0.01% |
+2,229
| New | +$255K |
|
865
Roundhill Generative AI & Technology ETF
CHAT
$589M
| $254K | ﹤0.01% |
6,301
+5,447
| +638% | +$220K |
|
866
Remitly
RELY
$3.97B
| $254K | ﹤0.01% |
+11,269
| New | +$254K |
|
867
CareTrust REIT
CTRE
$7.55B
| $253K | ﹤0.01% |
9,354
+9,113
| +3,781% | +$246K |
|
868
CryoPort
CYRX
$499M
| $251K | ﹤0.01% |
32,326
+3,660
| +13% | +$28.4K |
|
869
Mattel
MAT
$5.76B
| $251K | ﹤0.01% |
14,164
-3,571
| -20% | -$63.3K |
|
870
Adtran
ADTN
$820M
| $250K | ﹤0.01% |
30,121
+11,150
| +59% | +$92.5K |
|
871
ProShares UltraPro Short S&P 500
SPXU
$515M
| $250K | ﹤0.01% |
+11,109
| New | +$250K |
|
872
Element Solutions
ESI
$6.27B
| $249K | ﹤0.01% |
9,794
+5,724
| +141% | +$146K |
|
873
IAMGOLD
IAG
$6.26B
| $249K | ﹤0.01% |
48,261
-23,800
| -33% | -$123K |
|
874
Ultragenyx Pharmaceutical
RARE
$3.03B
| $249K | ﹤0.01% |
5,929
-4,418
| -43% | -$186K |
|
875
Axsome Therapeutics
AXSM
$6.23B
| $248K | ﹤0.01% |
2,942
-12,714
| -81% | -$1.07M |
|