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 |
CELG
Celgene Corp
CELG
|
$29.2M |
| 2 |
Citigroup
C
|
$19.6M |
| 3 |
Baidu
BIDU
|
$17.3M |
| 4 |
AGN
Allergan plc
AGN
|
$16.7M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
$14.4M |
Top Sells
| 1 |
Amazon
AMZN
|
$86.4M |
| 2 |
NVIDIA
NVDA
|
$58.6M |
| 3 |
Alphabet (Google) Class C
GOOG
|
$49.6M |
| 4 |
Apple
AAPL
|
$48.8M |
| 5 |
NetEase
NTES
|
$32.4M |
Sector Composition
| 1 | Consumer Discretionary | 18.31% |
| 2 | Technology | 17.31% |
| 3 | Healthcare | 11.47% |
| 4 | Communication Services | 11.25% |
| 5 | Industrials | 9.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
1
Amazon
AMZN
$2.44T
| $112M | 4.82% | 95,821 -73,913 | -44% | -$86.4M |
|
2
Micron Technology
MU
$133B
| $47.1M | 2.03% | 1,144,433 -150,325 | -12% | -$6.18M |
|
|
CELG
3
DELISTED
Celgene Corp
CELG
| $29.2M | 1.26% | +280,194 | New | +$29.2M |
|
|
4
Alphabet (Google) Class A
GOOGL
$2.57T
| $26.5M | 1.14% | 25,118 -17,058 | -40% | -$18M |
|
|
5
Alphabet (Google) Class C
GOOG
$2.58T
| $26.3M | 1.13% | 25,139 -47,374 | -65% | -$49.6M |
|
6
Boeing
BA
$177B
| $22.5M | 0.97% | 76,179 +5,771 | +8% | +$1.7M |
|
|
7
Baidu
BIDU
$32.8B
| $21.1M | 0.91% | 90,123 +73,732 | +450% | +$17.3M |
|
|
8
Citigroup
C
$178B
| $19.6M | 0.84% | +263,767 | New | +$19.6M |
|
9
Booking.com
BKNG
$181B
| $19.6M | 0.84% | 11,280 -3,631 | -24% | -$6.31M |
|
|
AGN
10
DELISTED
Allergan plc
AGN
| $16.7M | 0.72% | +102,335 | New | +$16.7M |
|
|
11
iShares MSCI Emerging Markets ETF
EEM
$19B
| $16.4M | 0.71% | 348,592 +306,505 | +728% | +$14.4M |
|
|
TWX
12
DELISTED
Time Warner Inc
TWX
| $15.9M | 0.69% | 174,250 -96,520 | -36% | -$8.83M |
|
13
Deere & Co
DE
$129B
| $15.6M | 0.67% | 99,931 -7,757 | -7% | -$1.21M |
|
|
14
NVIDIA
NVDA
$4.24T
| $15.2M | 0.66% | 78,673 -303,016 | -79% | -$58.6M |
|
|
15
Apple
AAPL
$3.45T
| $14.4M | 0.62% | 85,094 -288,294 | -77% | -$48.8M |
|
16
JD.com
JD
$44.1B
| $14.2M | 0.61% | 342,166 -77,972 | -19% | -$3.23M |
|
|
AABA
17
DELISTED
Altaba Inc. Common Stock
AABA
| $14.1M | 0.61% | 202,349 +78,273 | +63% | +$5.47M |
|
18
Broadcom
AVGO
$1.4T
| $13.3M | 0.57% | 51,687 +43,625 | +541% | +$11.2M |
|
19
Berkshire Hathaway Class B
BRK.B
$1.09T
| $12.8M | 0.55% | 64,639 +47,826 | +284% | +$9.48M |
|
20
IBM
IBM
$227B
| $12.7M | 0.55% | 82,928 +4,664 | +6% | +$716K |
|
21
Microsoft
MSFT
$3.77T
| $12.6M | 0.54% | 147,569 +118,511 | +408% | +$10.1M |
|
22
Mastercard
MA
$538B
| $12.6M | 0.54% | 83,199 +26,590 | +47% | +$4.02M |
|
23
AT&T
T
$209B
| $11.6M | 0.5% | 299,179 +237,523 | +385% | +$9.23M |
|
24
Lowe's Companies
LOW
$145B
| $11.5M | 0.49% | 123,740 +110,990 | +871% | +$10.3M |
|
25
PayPal
PYPL
$67.1B
| $11M | 0.48% | 149,973 +197 | +0.1% | +$14.5K |
|