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
|
$35.2M |
| 2 |
Micron Technology
MU
|
$32.9M |
| 3 |
Berkshire Hathaway Class B
BRK.B
|
$29.5M |
| 4 |
NVIDIA
NVDA
|
$22.9M |
| 5 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
$22M |
Top Sells
| 1 |
TWX
Time Warner Inc
TWX
|
$34.8M |
| 2 |
Amazon
AMZN
|
$33.4M |
| 3 |
Tesla
TSLA
|
$19.8M |
| 4 |
Netflix
NFLX
|
$17.7M |
| 5 |
TWTR
Twitter, Inc.
TWTR
|
$13.5M |
Sector Composition
| 1 | Technology | 20.43% |
| 2 | Consumer Discretionary | 15.24% |
| 3 | Communication Services | 12% |
| 4 | Financials | 10.18% |
| 5 | Industrials | 9.87% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
26
JPMorgan Chase
JPM
$820B
| $10.6M | 0.04% |
101,793
+16,974
| +20% | +$1.77M |
|
27
Qualcomm
QCOM
$169B
| $10.5M | 0.04% |
187,037
-21,967
| -11% | -$1.23M |
|
|
CELG
28
DELISTED
Celgene Corp
CELG
| $9.98M | 0.04% |
125,658
+31,934
| +34% | +$2.54M |
|
29
JD.com
JD
$44.2B
| $9.79M | 0.04% |
251,247
+244,904
| +3,861% | +$9.54M |
|
30
PG&E
PCG
$33.5B
| $9.32M | 0.04% |
+219,024
| New | +$9.32M |
|
31
Philip Morris
PM
$255B
| $8.85M | 0.03% |
109,635
+70,943
| +183% | +$5.73M |
|
32
Comcast
CMCSA
$124B
| $8.66M | 0.03% |
263,994
+202,877
| +332% | +$6.66M |
|
33
Walmart
WMT
$785B
| $8.26M | 0.03% |
96,449
+52,407
| +119% | +$4.49M |
|
34
AT&T
T
$207B
| $7.51M | 0.03% |
233,852
+9,133
| +4% | +$293K |
|
35
Prudential Financial
PRU
$37.5B
| $7.17M | 0.03% |
+76,719
| New | +$7.17M |
|
36
Goldman Sachs
GS
$221B
| $7.02M | 0.03% |
31,815
+4,369
| +16% | +$964K |
|
37
Weibo
WB
$2.82B
| $6.95M | 0.03% |
+78,308
| New | +$6.95M |
|
38
Microsoft
MSFT
$3.75T
| $6.87M | 0.03% |
69,702
+7,519
| +12% | +$741K |
|
39
Mastercard
MA
$534B
| $6.77M | 0.03% |
34,456
-54,161
| -61% | -$10.6M |
|
|
ABMD
40
DELISTED
Abiomed Inc
ABMD
| $6.73M | 0.03% |
16,464
+16,064
| +4,016% | +$6.57M |
|
41
Marathon Petroleum
MPC
$54.5B
| $6.72M | 0.03% |
+95,738
| New | +$6.72M |
|
42
Lockheed Martin
LMT
$105B
| $6.53M | 0.03% |
22,104
+20,904
| +1,742% | +$6.18M |
|
43
Oracle
ORCL
$631B
| $6.51M | 0.03% |
147,740
+122,857
| +494% | +$5.41M |
|
44
Union Pacific
UNP
$131B
| $6.45M | 0.03% |
+45,524
| New | +$6.45M |
|
45
3M
MMM
$80.6B
| $6.44M | 0.03% |
+32,728
| New | +$6.44M |
|
46
Regeneron Pharmaceuticals
REGN
$61.3B
| $6.23M | 0.02% |
+18,045
| New | +$6.23M |
|
47
Wynn Resorts
WYNN
$13.1B
| $6.13M | 0.02% |
+36,604
| New | +$6.13M |
|
48
Starbucks
SBUX
$99.1B
| $6.07M | 0.02% |
+124,317
| New | +$6.07M |
|
49
Delta Air Lines
DAL
$40.3B
| $5.87M | 0.02% |
118,518
+38,818
| +49% | +$1.92M |
|
50
Nutanix
NTNX
$18.3B
| $5.68M | 0.02% |
110,235
+109,935
| +36,645% | +$5.67M |
|