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
|
$84.3M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
$37M |
| 3 |
Amgen
AMGN
|
$32.3M |
| 4 |
Micron Technology
MU
|
$29.4M |
| 5 |
Qualcomm
QCOM
|
$18M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
$29.8M |
| 2 |
Gilead Sciences
GILD
|
$29.3M |
| 3 |
Goldman Sachs
GS
|
$27.7M |
| 4 |
Booking.com
BKNG
|
$26M |
| 5 |
AT&T
T
|
$20.8M |
Sector Composition
| 1 | Technology | 20.65% |
| 2 | Communication Services | 17.64% |
| 3 | Consumer Discretionary | 14.77% |
| 4 | Healthcare | 11.1% |
| 5 | Financials | 6.35% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
1
Amazon
AMZN
$2.44T
| $119M | 5.17% | 123,056 +87,061 | +242% | +$84.3M |
|
|
2
Alphabet (Google) Class A
GOOGL
$2.57T
| $56.1M | 2.44% | 60,392 +39,811 | +193% | +$37M |
|
|
3
Micron Technology
MU
$133B
| $54.8M | 2.38% | 1,834,712 +985,505 | +116% | +$29.4M |
|
4
NVIDIA
NVDA
$4.24T
| $49.3M | 2.14% | 341,305 +100,377 | +42% | +$14.5M |
|
5
Apple
AAPL
$3.45T
| $48.7M | 2.12% | 338,451 +73,090 | +28% | +$10.5M |
|
|
6
Alphabet (Google) Class C
GOOG
$2.58T
| $48.6M | 2.11% | 53,531 +4,713 | +10% | +$4.28M |
|
|
7
SPDR S&P 500 ETF Trust
SPY
$658B
| $42.8M | 1.86% | 176,879 -123,304 | -41% | -$29.8M |
|
8
Meta Platforms (Facebook)
META
$1.86T
| $41.1M | 1.79% | 272,347 -127,608 | -32% | -$19.3M |
|
9
Netflix
NFLX
$513B
| $33.6M | 1.46% | 224,795 +79,231 | +54% | +$11.8M |
|
|
10
Amgen
AMGN
$155B
| $32.3M | 1.4% | +187,633 | New | +$32.3M |
|
|
11
Qualcomm
QCOM
$173B
| $22.8M | 0.99% | 412,414 +326,465 | +380% | +$18M |
|
12
Baidu
BIDU
$32.8B
| $18.8M | 0.82% | 105,026 +64,893 | +162% | +$11.6M |
|
13
Western Digital
WDC
$27.9B
| $16M | 0.69% | 180,435 +90,802 | +101% | +$8.04M |
|
14
Constellation Brands
STZ
$28.5B
| $15.9M | 0.69% | 82,269 +64,141 | +354% | +$12.4M |
|
15
Microsoft
MSFT
$3.77T
| $15.2M | 0.66% | +221,193 | New | +$15.2M |
|
16
NetEase
NTES
$86.2B
| $15.1M | 0.66% | 50,244 +32,935 | +190% | +$9.9M |
|
17
Schlumberger
SLB
$55B
| $14.7M | 0.64% | 223,695 +177,787 | +387% | +$11.7M |
|
18
Mondelez International
MDLZ
$79.5B
| $13.7M | 0.59% | 316,653 +153,369 | +94% | +$6.62M |
|
19
Regeneron Pharmaceuticals
REGN
$61.5B
| $13.2M | 0.57% | +26,921 | New | +$13.2M |
|
20
Visa
V
$683B
| $12.1M | 0.53% | 129,014 +37,859 | +42% | +$3.55M |
|
|
X
21
DELISTED
US Steel
X
| $11.5M | 0.5% | 518,988 +427,396 | +467% | +$9.46M |
|
22
Mastercard
MA
$538B
| $11.3M | 0.49% | 93,310 +74,133 | +387% | +$9M |
|
23
SPDR Gold Trust
GLD
$107B
| $10.7M | 0.47% | 91,017 +65,218 | +253% | +$7.7M |
|
24
Walt Disney
DIS
$213B
| $10.2M | 0.44% | 96,122 +26,602 | +38% | +$2.83M |
|
|
CELG
25
DELISTED
Celgene Corp
CELG
| $9.98M | 0.43% | 76,819 +4,126 | +6% | +$536K |
|