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 |
Alphabet (Google) Class C
GOOG
|
$54.2M |
| 2 |
Apple
AAPL
|
$28.6M |
| 3 |
Meta Platforms (Facebook)
META
|
$16.5M |
| 4 |
IBM
IBM
|
$13.4M |
| 5 |
Baidu
BIDU
|
$10.3M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
$9.89M |
| 2 |
McDonald's
MCD
|
$8.52M |
| 3 |
Ralph Lauren
RL
|
$5.22M |
| 4 |
Intel
INTC
|
$4.74M |
| 5 |
WBA
Walgreens Boots Alliance
WBA
|
$4.67M |
Sector Composition
| 1 | Communication Services | 22.01% |
| 2 | Technology | 15.83% |
| 3 | Healthcare | 11.95% |
| 4 | Consumer Discretionary | 9.73% |
| 5 | Financials | 7.98% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
1
Alphabet (Google) Class C
GOOG
$2.58T
| $93.8M | 7.86% | 176,736 +102,062 | +137% | +$54.2M |
|
|
2
Apple
AAPL
$3.45T
| $28.9M | 2.42% | 230,438 +227,688 | +8,280% | +$28.6M |
|
|
3
Meta Platforms (Facebook)
META
$1.86T
| $19.3M | 1.62% | 225,596 +192,777 | +587% | +$16.5M |
|
4
Berkshire Hathaway Class B
BRK.B
$1.09T
| $15.2M | 1.27% | 111,432 +26,252 | +31% | +$3.57M |
|
5
Netflix
NFLX
$513B
| $14.6M | 1.23% | 22,288 +14,685 | +193% | +$9.65M |
|
|
6
IBM
IBM
$227B
| $13.4M | 1.12% | +82,168 | New | +$13.4M |
|
|
7
Baidu
BIDU
$32.8B
| $12.1M | 1.01% | 60,635 +51,638 | +574% | +$10.3M |
|
8
Biogen
BIIB
$19.4B
| $11.7M | 0.98% | 28,956 +22,130 | +324% | +$8.94M |
|
9
Goldman Sachs
GS
$226B
| $11.4M | 0.95% | 54,419 +15,828 | +41% | +$3.3M |
|
|
CELG
10
DELISTED
Celgene Corp
CELG
| $10M | 0.84% | 86,419 +45,234 | +110% | +$5.23M |
|
11
Williams Companies
WMB
$70.7B
| $9.88M | 0.83% | +172,169 | New | +$9.88M |
|
12
Alibaba
BABA
$322B
| $9.43M | 0.79% | 114,631 -4,562 | -4% | -$375K |
|
|
TWTR
13
DELISTED
Twitter, Inc.
TWTR
| $9.38M | 0.79% | 259,058 +200,020 | +339% | +$7.24M |
|
14
Wynn Resorts
WYNN
$13.2B
| $9.32M | 0.78% | 94,460 +82,810 | +711% | +$8.17M |
|
15
PepsiCo
PEP
$204B
| $8.83M | 0.74% | 94,605 +75,587 | +397% | +$7.05M |
|
16
iShares 20+ Year Treasury Bond ETF
TLT
$47.8B
| $8.39M | 0.7% | +71,455 | New | +$8.39M |
|
17
Micron Technology
MU
$133B
| $8.22M | 0.69% | 436,254 +261,262 | +149% | +$4.92M |
|
18
HCA Healthcare
HCA
$94.5B
| $7.41M | 0.62% | 81,626 +54,693 | +203% | +$4.96M |
|
19
Amazon
AMZN
$2.44T
| $7.25M | 0.61% | +16,711 | New | +$7.25M |
|
20
Broadcom
AVGO
$1.4T
| $7.2M | 0.6% | +54,150 | New | +$7.2M |
|
21
Chipotle Mexican Grill
CMG
$56.5B
| $6.51M | 0.55% | 10,761 +5,435 | +102% | +$3.29M |
|
22
American Airlines Group
AAL
$8.82B
| $6.02M | 0.5% | +150,839 | New | +$6.02M |
|
23
Salesforce
CRM
$245B
| $6.01M | 0.5% | +86,301 | New | +$6.01M |
|
24
Walmart
WMT
$774B
| $5.79M | 0.48% | 81,567 +2,753 | +3% | +$195K |
|
|
QIHU
25
DELISTED
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
| $5.26M | 0.44% | 77,776 +59,411 | +324% | +$4.02M |
|