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 |
Gilead Sciences
GILD
|
$16.8M |
| 2 |
Apple
AAPL
|
$16.2M |
| 3 |
Booking.com
BKNG
|
$15.6M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
$15.3M |
| 5 |
Wells Fargo
WFC
|
$11.9M |
Top Sells
| 1 |
SPDR Gold Trust
GLD
|
$38M |
| 2 |
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
|
$30.7M |
| 3 |
LNKD
LinkedIn Corporation
LNKD
|
$15.2M |
| 4 |
CELG
Celgene Corp
CELG
|
$11.5M |
| 5 |
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
|
$10.5M |
Sector Composition
| 1 | Communication Services | 15.83% |
| 2 | Healthcare | 15.63% |
| 3 | Consumer Discretionary | 12.92% |
| 4 | Technology | 11.44% |
| 5 | Financials | 8.29% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1
Meta Platforms (Facebook)
META
$1.86T
| $36.9M | 2.5% | 287,418 +61,492 | +27% | +$7.89M |
|
|
2
Gilead Sciences
GILD
$140B
| $20.3M | 1.37% | 256,305 +212,451 | +484% | +$16.8M |
|
|
3
Alphabet (Google) Class A
GOOGL
$2.57T
| $20.1M | 1.36% | 25,022 +19,069 | +320% | +$15.3M |
|
|
4
Apple
AAPL
$3.45T
| $19M | 1.29% | 168,412 +143,302 | +571% | +$16.2M |
|
|
LNKD
5
DELISTED
LinkedIn Corporation
LNKD
| $17.4M | 1.18% | 91,241 -79,556 | -47% | -$15.2M |
|
|
6
Booking.com
BKNG
$181B
| $15.6M | 1.05% | +10,569 | New | +$15.6M |
|
7
Biogen
BIIB
$19.4B
| $13.7M | 0.93% | 43,761 -12,706 | -23% | -$3.98M |
|
8
Wynn Resorts
WYNN
$13.2B
| $12.4M | 0.84% | 126,843 +108,404 | +588% | +$10.6M |
|
|
9
Wells Fargo
WFC
$263B
| $11.9M | 0.81% | +269,446 | New | +$11.9M |
|
|
10
Alphabet (Google) Class C
GOOG
$2.58T
| $10.3M | 0.7% | +13,240 | New | +$10.3M |
|
|
MDVN
11
DELISTED
MEDIVATION, INC.
MDVN
| $8.62M | 0.58% | 105,918 +97,056 | +1,095% | +$7.9M |
|
12
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
$17.8B
| $8.15M | 0.55% | +93,358 | New | +$8.15M |
|
13
Walt Disney
DIS
$213B
| $7.12M | 0.48% | +76,647 | New | +$7.12M |
|
14
Goldman Sachs
GS
$226B
| $6.8M | 0.46% | 42,173 +8,020 | +23% | +$1.29M |
|
15
Cisco
CSCO
$274B
| $6.3M | 0.43% | +198,469 | New | +$6.3M |
|
16
Chipotle Mexican Grill
CMG
$56.5B
| $6.24M | 0.42% | 14,733 -3,919 | -21% | -$1.66M |
|
17
Teva Pharmaceuticals
TEVA
$21.1B
| $6.12M | 0.41% | 132,953 +128,295 | +2,754% | +$5.9M |
|
18
Hershey
HSY
$37.3B
| $5.99M | 0.41% | 62,635 +34,726 | +124% | +$3.32M |
|
19
Amazon
AMZN
$2.44T
| $5.59M | 0.38% | +6,680 | New | +$5.59M |
|
20
Bank of America
BAC
$376B
| $5.58M | 0.38% | 356,312 +218,038 | +158% | +$3.41M |
|
21
Visa
V
$683B
| $5.55M | 0.38% | 67,085 -112,443 | -63% | -$9.3M |
|
22
WisdomTree Japan Hedged Equity Fund
DXJ
$3.7B
| $5.47M | 0.37% | 127,531 -166,664 | -57% | -$7.15M |
|
23
Starbucks
SBUX
$100B
| $5.28M | 0.36% | 97,492 -37,080 | -28% | -$2.01M |
|
24
McDonald's
MCD
$224B
| $5.23M | 0.35% | 45,329 +649 | +1% | +$74.9K |
|
25
Energy Transfer Partners
ET
$60.8B
| $5.17M | 0.35% | 307,677 -28,715 | -9% | -$482K |
|