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 |
iShares Russell 2000 ETF
IWM
|
$27.5M |
| 2 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
$16.3M |
| 3 |
Walt Disney
DIS
|
$13.9M |
| 4 |
iShares MSCI Emerging Markets ETF
EEM
|
$10.4M |
| 5 |
Gilead Sciences
GILD
|
$10.4M |
Top Sells
| 1 |
Alphabet (Google) Class C
GOOG
|
$95.3M |
| 2 |
Apple
AAPL
|
$21.1M |
| 3 |
Meta Platforms (Facebook)
META
|
$20M |
| 4 |
IBM
IBM
|
$13.4M |
| 5 |
Baidu
BIDU
|
$12.1M |
Sector Composition
| 1 | Healthcare | 13.63% |
| 2 | Communication Services | 9.81% |
| 3 | Consumer Discretionary | 9.7% |
| 4 | Technology | 9.67% |
| 5 | Financials | 9.48% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
1
iShares Russell 2000 ETF
IWM
$67B
| $27.5M | 2.01% | +251,486 | New | +$27.5M |
|
|
2
SPDR Dow Jones Industrial Average ETF Trust
DIA
$39.9B
| $16.3M | 1.2% | +100,469 | New | +$16.3M |
|
|
3
Alphabet (Google) Class C
GOOG
$2.58T
| $16.1M | 1.18% | 25,583 -151,153 | -86% | -$95.3M |
|
|
4
Walt Disney
DIS
$213B
| $13.9M | 1.02% | +136,073 | New | +$13.9M |
|
5
iShares 20+ Year Treasury Bond ETF
TLT
$47.8B
| $12.1M | 0.89% | 97,748 +26,293 | +37% | +$3.25M |
|
6
Netflix
NFLX
$513B
| $11M | 0.81% | 106,561 +84,273 | +378% | +$8.7M |
|
|
7
iShares MSCI Emerging Markets ETF
EEM
$19B
| $10.7M | 0.78% | 324,956 +318,362 | +4,828% | +$10.4M |
|
|
8
Gilead Sciences
GILD
$140B
| $10.4M | 0.76% | +106,062 | New | +$10.4M |
|
9
Booking.com
BKNG
$181B
| $10.3M | 0.75% | +8,326 | New | +$10.3M |
|
10
iShares MSCI EAFE ETF
EFA
$66B
| $10.1M | 0.74% | +176,807 | New | +$10.1M |
|
11
Invesco QQQ Trust
QQQ
$364B
| $10.1M | 0.74% | +99,302 | New | +$10.1M |
|
12
Energy Select Sector SPDR Fund
XLE
$27.6B
| $8.64M | 0.63% | +141,209 | New | +$8.64M |
|
13
Citigroup
C
$178B
| $8.15M | 0.6% | 164,185 +145,243 | +767% | +$7.21M |
|
14
Yum! Brands
YUM
$40.8B
| $7.45M | 0.55% | 93,131 +77,475 | +495% | +$6.19M |
|
15
Alibaba
BABA
$322B
| $6.64M | 0.49% | 112,626 -2,005 | -2% | -$118K |
|
16
NXP Semiconductors
NXPI
$59.2B
| $6.5M | 0.48% | 74,649 +47,781 | +178% | +$4.16M |
|
17
RTX Corp
RTX
$212B
| $6.12M | 0.45% | 68,757 +60,367 | +720% | +$5.37M |
|
18
Amgen
AMGN
$155B
| $6.07M | 0.45% | 43,906 +20,830 | +90% | +$2.88M |
|
19
Berkshire Hathaway Class B
BRK.B
$1.09T
| $5.98M | 0.44% | 45,833 -65,599 | -59% | -$8.55M |
|
20
Chevron
CVX
$324B
| $5.67M | 0.42% | 71,847 +54,765 | +321% | +$4.32M |
|
21
JPMorgan Chase
JPM
$829B
| $5.62M | 0.41% | +92,192 | New | +$5.62M |
|
|
CELG
22
DELISTED
Celgene Corp
CELG
| $5.59M | 0.41% | 51,649 -34,770 | -40% | -$3.76M |
|
23
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
$17.8B
| $5.33M | 0.39% | 64,004 +63,190 | +7,763% | +$5.26M |
|
24
Goldman Sachs
GS
$226B
| $5.23M | 0.38% | 30,107 -24,312 | -45% | -$4.22M |
|
25
American International
AIG
$45.1B
| $5.07M | 0.37% | 89,193 +42,874 | +93% | +$2.44M |
|