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 |
Amazon
AMZN
|
$158M |
| 2 |
Invesco QQQ Trust
QQQ
|
$69.1M |
| 3 |
Meta Platforms (Facebook)
META
|
$57.4M |
| 4 |
Citigroup
C
|
$23.4M |
| 5 |
Goldman Sachs
GS
|
$23M |
Top Sells
| 1 |
Apple
AAPL
|
$49.8M |
| 2 |
Berkshire Hathaway Class B
BRK.B
|
$43.2M |
| 3 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
$42.2M |
| 4 |
Micron Technology
MU
|
$26.1M |
| 5 |
Adobe
ADBE
|
$21M |
Sector Composition
| 1 | Consumer Discretionary | 20.63% |
| 2 | Communication Services | 16.3% |
| 3 | Technology | 12.42% |
| 4 | Industrials | 9.24% |
| 5 | Healthcare | 8.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
1
Amazon
AMZN
$2.44T
| $211M | 0.68% | 105,369 +78,897 | +298% | +$158M |
|
|
2
Meta Platforms (Facebook)
META
$1.86T
| $70.7M | 0.23% | 429,889 +349,184 | +433% | +$57.4M |
|
|
3
Invesco QQQ Trust
QQQ
$364B
| $69.1M | 0.22% | +371,806 | New | +$69.1M |
|
4
Netflix
NFLX
$513B
| $37.3M | 0.12% | 99,724 +9,971 | +11% | +$3.73M |
|
5
NVIDIA
NVDA
$4.24T
| $32.2M | 0.1% | 114,490 +9,447 | +9% | +$2.65M |
|
6
Alphabet (Google) Class C
GOOG
$2.58T
| $31.9M | 0.1% | 26,687 +12,094 | +83% | +$14.4M |
|
|
7
Goldman Sachs
GS
$226B
| $30.2M | 0.1% | 134,493 +102,678 | +323% | +$23M |
|
8
Boeing
BA
$177B
| $26.5M | 0.09% | 71,366 -3,240 | -4% | -$1.2M |
|
|
9
Citigroup
C
$178B
| $24.6M | 0.08% | 343,216 +326,477 | +1,950% | +$23.4M |
|
10
Baidu
BIDU
$32.8B
| $23.3M | 0.07% | 101,716 +55,278 | +119% | +$12.6M |
|
|
XYZ
11
Block, Inc.
XYZ
$48.5B
| $22M | 0.07% | 222,579 +42,917 | +24% | +$4.25M |
|
12
iShares Russell 2000 ETF
IWM
$67B
| $21.4M | 0.07% | +127,252 | New | +$21.4M |
|
13
iShares China Large-Cap ETF
FXI
$6.65B
| $16.5M | 0.05% | +386,079 | New | +$16.5M |
|
14
Roku
ROKU
$14.2B
| $16M | 0.05% | 218,897 +194,280 | +789% | +$14.2M |
|
|
15
Alphabet (Google) Class A
GOOGL
$2.57T
| $14.8M | 0.05% | 12,245 -3,672 | -23% | -$4.43M |
|
16
Union Pacific
UNP
$133B
| $14.5M | 0.05% | 89,087 +43,563 | +96% | +$7.09M |
|
17
Marathon Petroleum
MPC
$54.6B
| $13.3M | 0.04% | 166,804 +71,066 | +74% | +$5.68M |
|
|
18
Micron Technology
MU
$133B
| $12.7M | 0.04% | 280,441 -577,021 | -67% | -$26.1M |
|
19
JD.com
JD
$44.1B
| $11.9M | 0.04% | 454,620 +203,373 | +81% | +$5.31M |
|
20
Caterpillar
CAT
$196B
| $11.4M | 0.04% | 74,592 -70,608 | -49% | -$10.8M |
|
21
FedEx
FDX
$54.5B
| $10.2M | 0.03% | +42,209 | New | +$10.2M |
|
22
Schlumberger
SLB
$55B
| $10.1M | 0.03% | 165,897 +144,052 | +659% | +$8.78M |
|
|
TWTR
23
DELISTED
Twitter, Inc.
TWTR
| $9.8M | 0.03% | 344,228 +341,428 | +12,194% | +$9.72M |
|
|
ABMD
24
DELISTED
Abiomed Inc
ABMD
| $9.57M | 0.03% | 21,279 +4,815 | +29% | +$2.17M |
|
25
Salesforce
CRM
$245B
| $8.71M | 0.03% | +54,765 | New | +$8.71M |
|