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 |
Invesco QQQ Trust
QQQ
|
$85.4M |
| 2 |
SPDR Gold Trust
GLD
|
$75.9M |
| 3 |
NVIDIA
NVDA
|
$42.6M |
| 4 |
Netflix
NFLX
|
$41.1M |
| 5 |
iShares MSCI EAFE ETF
EFA
|
$40.5M |
Top Sells
| 1 |
Apple
AAPL
|
$65.7M |
| 2 |
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
|
$25.5M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
$24.4M |
| 4 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
$24.3M |
| 5 |
Broadcom
AVGO
|
$21.3M |
Sector Composition
| 1 | Technology | 15.2% |
| 2 | Consumer Discretionary | 14.52% |
| 3 | Communication Services | 10.57% |
| 4 | Healthcare | 8.15% |
| 5 | Financials | 7.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
76
Pinterest
PINS
$25.2B
| $5.38M | 0.01% |
242,553
-42,514
| -15% | -$942K |
|
77
Cloudflare
NET
$73.2B
| $5.33M | 0.01% |
148,213
+90,114
| +155% | +$3.24M |
|
78
Palo Alto Networks
PANW
$129B
| $5.31M | 0.01% |
138,600
-219,636
| -61% | -$8.41M |
|
|
79
SPDR S&P 500 ETF Trust
SPY
$662B
| $5.25M | 0.01% |
17,023
-79,001
| -82% | -$24.4M |
|
80
Enphase Energy
ENPH
$4.78B
| $5.25M | 0.01% |
110,306
+69,804
| +172% | +$3.32M |
|
81
Consumer Discretionary Select Sector SPDR Fund
XLY
$23.6B
| $5.14M | 0.01% |
40,280
+40,180
| +40,180% | +$5.13M |
|
82
Match Group
MTCH
$9B
| $5.13M | 0.01% |
47,930
+47,301
| +7,520% | +$5.06M |
|
83
Las Vegas Sands
LVS
$37.8B
| $5.12M | 0.01% |
112,472
+18,818
| +20% | +$857K |
|
84
Materials Select Sector SPDR Fund
XLB
$5.48B
| $4.82M | 0.01% |
85,596
-35,542
| -29% | -$2M |
|
85
Merck
MRK
$210B
| $4.72M | 0.01% |
+63,984
| New | +$4.72M |
|
86
iShares US Aerospace & Defense ETF
ITA
$9.32B
| $4.58M | 0.01% |
55,564
+39,782
| +252% | +$3.28M |
|
87
Capital One
COF
$145B
| $4.47M | 0.01% |
71,396
+54,399
| +320% | +$3.4M |
|
88
Ford
F
$46.5B
| $4.46M | 0.01% |
733,286
+214,560
| +41% | +$1.3M |
|
89
Boston Scientific
BSX
$159B
| $4.41M | 0.01% |
125,734
+124,410
| +9,397% | +$4.37M |
|
90
Pan American Silver
PAAS
$12.1B
| $4.29M | 0.01% |
+141,132
| New | +$4.29M |
|
91
Costco
COST
$424B
| $4.28M | 0.01% |
+14,128
| New | +$4.28M |
|
92
iShares Expanded Tech-Software Sector ETF
IGV
$9.73B
| $4.12M | 0.01% |
+72,515
| New | +$4.12M |
|
93
Ross Stores
ROST
$50B
| $4.08M | 0.01% |
47,869
+22,135
| +86% | +$1.89M |
|
94
Medtronic
MDT
$119B
| $4.04M | 0.01% |
44,023
+22,172
| +101% | +$2.03M |
|
95
TransDigm Group
TDG
$72.2B
| $4.03M | 0.01% |
+9,127
| New | +$4.03M |
|
|
96
Apple
AAPL
$3.56T
| $4.01M | 0.01% |
44,000
-720,820
| -94% | -$65.7M |
|
97
McDonald's
MCD
$226B
| $4M | 0.01% |
21,667
-15,157
| -41% | -$2.8M |
|
98
Microchip Technology
MCHP
$34.8B
| $3.98M | 0.01% |
75,672
-3,220
| -4% | -$170K |
|
99
Regeneron Pharmaceuticals
REGN
$60.1B
| $3.94M | 0.01% |
+6,310
| New | +$3.94M |
|
100
NIO
NIO
$13.8B
| $3.91M | 0.01% |
506,373
+419,044
| +480% | +$3.23M |
|