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 |
Alibaba
BABA
|
$48.9M |
| 2 |
Boeing
BA
|
$25.8M |
| 3 |
SPDR Gold Trust
GLD
|
$18.2M |
| 4 |
Biogen
BIIB
|
$15.8M |
| 5 |
FedEx
FDX
|
$13.6M |
Top Sells
| 1 |
Alphabet (Google) Class C
GOOG
|
$62.1M |
| 2 |
iShares Russell 2000 ETF
IWM
|
$36.4M |
| 3 |
Industrial Select Sector SPDR Fund
XLI
|
$17.5M |
| 4 |
Netflix
NFLX
|
$16.3M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
$14.6M |
Sector Composition
| 1 | Consumer Discretionary | 16.75% |
| 2 | Technology | 16.32% |
| 3 | Healthcare | 12.17% |
| 4 | Industrials | 12.14% |
| 5 | Communication Services | 7.05% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
1
Alibaba
BABA
$322B
| $52.6M | 0.15% | 314,811 +292,680 | +1,322% | +$48.9M |
|
2
NVIDIA
NVDA
$4.24T
| $32.2M | 0.09% | 185,051 -38,230 | -17% | -$6.65M |
|
|
3
Boeing
BA
$177B
| $29.8M | 0.08% | 78,444 +67,929 | +646% | +$25.8M |
|
|
4
Netflix
NFLX
$513B
| $22.5M | 0.06% | 84,248 -60,779 | -42% | -$16.3M |
|
|
5
SPDR Gold Trust
GLD
$107B
| $18.2M | 0.05% | +131,281 | New | +$18.2M |
|
|
6
Biogen
BIIB
$19.4B
| $15.8M | 0.05% | +68,075 | New | +$15.8M |
|
|
7
FedEx
FDX
$54.5B
| $13.6M | 0.04% | 93,530 +93,430 | +93,430% | +$13.6M |
|
8
SPDR Dow Jones Industrial Average ETF Trust
DIA
$39.9B
| $13.3M | 0.04% | +49,244 | New | +$13.3M |
|
|
9
Alphabet (Google) Class C
GOOG
$2.58T
| $11.7M | 0.03% | 9,586 -50,931 | -84% | -$62.1M |
|
10
Booking.com
BKNG
$181B
| $10.9M | 0.03% | 5,545 +5,231 | +1,666% | +$10.3M |
|
11
Fidelity National Information Services
FIS
$36.5B
| $10.6M | 0.03% | +79,603 | New | +$10.6M |
|
12
Northrop Grumman
NOC
$84.5B
| $10.3M | 0.03% | 27,389 +24,532 | +859% | +$9.19M |
|
13
Salesforce
CRM
$245B
| $10.2M | 0.03% | 68,744 -26,129 | -28% | -$3.88M |
|
14
PayPal
PYPL
$67.1B
| $9.91M | 0.03% | +95,624 | New | +$9.91M |
|
15
Energy Select Sector SPDR Fund
XLE
$27.6B
| $9.71M | 0.03% | 164,059 +37,236 | +29% | +$2.2M |
|
16
Adobe
ADBE
$151B
| $9.15M | 0.03% | +33,117 | New | +$9.15M |
|
17
RTX Corp
RTX
$212B
| $9M | 0.03% | 65,920 -20,140 | -23% | -$2.75M |
|
|
XYZ
18
Block, Inc.
XYZ
$48.5B
| $8.91M | 0.03% | 143,833 +49,881 | +53% | +$3.09M |
|
19
Consumer Discretionary Select Sector SPDR Fund
XLY
$23.2B
| $8.13M | 0.02% | 67,347 +54,638 | +430% | +$6.59M |
|
20
JD.com
JD
$44.1B
| $7.38M | 0.02% | +261,772 | New | +$7.38M |
|
21
Amgen
AMGN
$155B
| $7.3M | 0.02% | 37,738 +15,455 | +69% | +$2.99M |
|
22
Wynn Resorts
WYNN
$13.2B
| $7.15M | 0.02% | 65,747 +53,100 | +420% | +$5.77M |
|
23
Amazon
AMZN
$2.44T
| $6.88M | 0.02% | +3,961 | New | +$6.88M |
|
24
Morgan Stanley
MS
$240B
| $6.76M | 0.02% | 158,418 +103,389 | +188% | +$4.41M |
|
25
ProShares Short VIX Short-Term Futures ETF
SVXY
$247M
| $6.75M | 0.02% | 126,372 +106,639 | +540% | +$5.7M |
|