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 |
SPDR S&P 500 ETF Trust
SPY
|
$50.9M |
| 2 |
Citigroup
C
|
$25.9M |
| 3 |
Apple
AAPL
|
$25.1M |
| 4 |
Amazon
AMZN
|
$21.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
$18.3M |
Top Sells
| 1 |
LNKD
LinkedIn Corporation
LNKD
|
$17.4M |
| 2 |
Wells Fargo
WFC
|
$11.9M |
| 3 |
Goldman Sachs
GS
|
$9.91M |
| 4 |
MDVN
MEDIVATION, INC.
MDVN
|
$8.62M |
| 5 |
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
|
$8.15M |
Sector Composition
| 1 | Communication Services | 15.08% |
| 2 | Technology | 12.4% |
| 3 | Healthcare | 11.9% |
| 4 | Consumer Discretionary | 11.24% |
| 5 | Financials | 9.26% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
1
SPDR S&P 500 ETF Trust
SPY
$658B
| $50.9M | 3.04% | +227,870 | New | +$50.9M |
|
2
Meta Platforms (Facebook)
META
$1.86T
| $49.2M | 2.94% | 427,662 +140,244 | +49% | +$16.1M |
|
|
3
Apple
AAPL
$3.45T
| $44.6M | 2.66% | 384,789 +216,377 | +128% | +$25.1M |
|
|
4
Alphabet (Google) Class C
GOOG
$2.58T
| $28.5M | 1.7% | 36,965 +23,725 | +179% | +$18.3M |
|
|
5
Amazon
AMZN
$2.44T
| $26.7M | 1.6% | 35,643 +28,963 | +434% | +$21.7M |
|
|
6
Citigroup
C
$178B
| $25.9M | 1.55% | +436,206 | New | +$25.9M |
|
7
Gilead Sciences
GILD
$140B
| $22.1M | 1.32% | 308,364 +52,059 | +20% | +$3.73M |
|
|
8
Alphabet (Google) Class A
GOOGL
$2.57T
| $17.6M | 1.05% | 22,228 -2,794 | -11% | -$2.21M |
|
9
Netflix
NFLX
$513B
| $17.2M | 1.03% | 138,643 +133,369 | +2,529% | +$16.5M |
|
10
Invesco QQQ Trust
QQQ
$364B
| $13.3M | 0.8% | +112,451 | New | +$13.3M |
|
11
General Motors
GM
$55.8B
| $10.1M | 0.6% | 289,733 +229,275 | +379% | +$7.99M |
|
12
Booking.com
BKNG
$181B
| $10M | 0.6% | 6,847 -3,722 | -35% | -$5.46M |
|
13
Eli Lilly
LLY
$657B
| $9.69M | 0.58% | 131,715 +88,040 | +202% | +$6.47M |
|
14
Mastercard
MA
$538B
| $9.57M | 0.57% | 92,725 +48,905 | +112% | +$5.05M |
|
15
Palo Alto Networks
PANW
$127B
| $9.41M | 0.56% | +75,244 | New | +$9.41M |
|
16
JPMorgan Chase
JPM
$829B
| $8.92M | 0.53% | +103,409 | New | +$8.92M |
|
17
Chevron
CVX
$324B
| $8.89M | 0.53% | +75,491 | New | +$8.89M |
|
18
Walt Disney
DIS
$213B
| $8.37M | 0.5% | 80,279 +3,632 | +5% | +$378K |
|
19
Costco
COST
$418B
| $8.32M | 0.5% | +51,977 | New | +$8.32M |
|
20
Mondelez International
MDLZ
$79.5B
| $7.76M | 0.46% | +174,983 | New | +$7.76M |
|
21
iShares Biotechnology ETF
IBB
$5.6B
| $7.5M | 0.45% | 28,261 +13,683 | +94% | +$3.63M |
|
22
VanEck Gold Miners ETF
GDX
$19B
| $6.79M | 0.41% | +324,524 | New | +$6.79M |
|
23
NXP Semiconductors
NXPI
$59.2B
| $6.6M | 0.39% | 67,292 +35,698 | +113% | +$3.5M |
|
24
Adobe
ADBE
$151B
| $6.39M | 0.38% | 62,021 +61,760 | +23,663% | +$6.36M |
|
25
Procter & Gamble
PG
$368B
| $5.47M | 0.33% | +65,054 | New | +$5.47M |
|