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 |
Microsoft
MSFT
|
$101M |
| 2 |
NVIDIA
NVDA
|
$66M |
| 3 |
Citigroup
C
|
$51.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
$42.7M |
| 5 |
SPDR Gold Trust
GLD
|
$39.4M |
Top Sells
| 1 |
Apple
AAPL
|
$411M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
$64M |
| 3 |
Meta Platforms (Facebook)
META
|
$39.8M |
| 4 |
iShares Core S&P 500 ETF
IVV
|
$34.3M |
| 5 |
PayPal
PYPL
|
$32.9M |
Sector Composition
| 1 | Technology | 17.4% |
| 2 | Financials | 12.04% |
| 3 | Consumer Discretionary | 10.17% |
| 4 | Healthcare | 8.63% |
| 5 | Industrials | 6.03% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
26
Paychex
PAYX
$48.8B
| $16.4M | 0.02% |
+145,954
| New | +$16.4M |
|
27
Mercado Libre
MELI
$120B
| $15.6M | 0.02% |
18,860
+5,185
| +38% | +$4.29M |
|
28
Linde
LIN
$221B
| $15.4M | 0.02% |
+57,291
| New | +$15.4M |
|
29
Cameco
CCJ
$33.6B
| $15.4M | 0.02% |
579,462
+245,515
| +74% | +$6.51M |
|
30
SPDR S&P Oil & Gas Exploration & Production ETF
XOP
$1.86B
| $15.3M | 0.02% |
122,331
-60,762
| -33% | -$7.58M |
|
31
Petrobras
PBR
$79.3B
| $15M | 0.02% |
1,214,530
+966,636
| +390% | +$11.9M |
|
32
TSMC
TSM
$1.2T
| $14.2M | 0.02% |
207,189
-434,771
| -68% | -$29.8M |
|
33
Wells Fargo
WFC
$258B
| $14.2M | 0.02% |
352,841
-37,373
| -10% | -$1.5M |
|
34
Chevron
CVX
$318B
| $14.1M | 0.02% |
98,045
-54,177
| -36% | -$7.78M |
|
35
American Airlines Group
AAL
$8.87B
| $13.9M | 0.02% |
1,154,032
+905,234
| +364% | +$10.9M |
|
36
Consumers Staples Select Sector SPDR Fund
XLP
$15.8B
| $13.6M | 0.02% |
+203,802
| New | +$13.6M |
|
37
Lockheed Martin
LMT
$105B
| $13.5M | 0.02% |
34,956
+2,792
| +9% | +$1.08M |
|
38
Bristol-Myers Squibb
BMY
$96.7B
| $13.3M | 0.02% |
187,585
-53,474
| -22% | -$3.8M |
|
|
39
Vanguard S&P 500 ETF
VOO
$724B
| $12.8M | 0.01% |
38,853
-194,907
| -83% | -$64M |
|
40
Oracle
ORCL
$628B
| $12.7M | 0.01% |
+207,499
| New | +$12.7M |
|
41
Colgate-Palmolive
CL
$67.7B
| $12.6M | 0.01% |
178,856
+75,454
| +73% | +$5.3M |
|
|
42
PayPal
PYPL
$66.5B
| $12.3M | 0.01% |
142,798
-381,734
| -73% | -$32.9M |
|
43
Palantir
PLTR
$367B
| $12.2M | 0.01% |
1,499,229
+121,530
| +9% | +$988K |
|
44
Consumer Discretionary Select Sector SPDR Fund
XLY
$23.2B
| $12M | 0.01% |
+84,336
| New | +$12M |
|
45
GSK
GSK
$79.3B
| $11.7M | 0.01% |
398,118
+244,857
| +160% | +$8.11M |
|
46
First Solar
FSLR
$21.6B
| $11.6M | 0.01% |
+87,335
| New | +$11.6M |
|
47
SPDR Bloomberg High Yield Bond ETF
JNK
$8.07B
| $11.5M | 0.01% |
130,355
+9,018
| +7% | +$792K |
|
48
ConocoPhillips
COP
$118B
| $10.5M | 0.01% |
102,559
+17,101
| +20% | +$1.75M |
|
49
Las Vegas Sands
LVS
$38B
| $10.2M | 0.01% |
+272,569
| New | +$10.2M |
|
50
BP
BP
$88.8B
| $10.1M | 0.01% |
354,469
-234,805
| -40% | -$6.7M |
|