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 |
Apple
AAPL
|
$186M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
$86.2M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
$56.8M |
| 4 |
iShares Silver Trust
SLV
|
$42.9M |
| 5 |
Advanced Micro Devices
AMD
|
$36.5M |
Top Sells
| 1 |
Occidental Petroleum
OXY
|
$44.4M |
| 2 |
Financial Select Sector SPDR Fund
XLF
|
$42.8M |
| 3 |
Verizon
VZ
|
$40.8M |
| 4 |
Direxion Daily S&P 500 Bull 3x Shares
SPXL
|
$33.6M |
| 5 |
iShares China Large-Cap ETF
FXI
|
$33M |
Sector Composition
| 1 | Technology | 23.31% |
| 2 | Consumer Discretionary | 13.02% |
| 3 | Industrials | 8.23% |
| 4 | Healthcare | 7.47% |
| 5 | Financials | 6.38% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
26
Target
TGT
$43.6B
| $19.2M | 0.02% | 90,594 +71,736 | +380% | +$15.2M |
|
27
iShares US Real Estate ETF
IYR
$3.76B
| $19.1M | 0.02% | +176,539 | New | +$19.1M |
|
28
Vanguard Total Stock Market ETF
VTI
$526B
| $19M | 0.02% | 83,580 +68,119 | +441% | +$15.5M |
|
29
Mastercard
MA
$538B
| $18.2M | 0.02% | 51,041 +35,675 | +232% | +$12.7M |
|
30
Baidu
BIDU
$32.8B
| $17.9M | 0.02% | 135,531 +27,256 | +25% | +$3.61M |
|
31
Expedia Group
EXPE
$26.6B
| $17.8M | 0.02% | +90,953 | New | +$17.8M |
|
32
PayPal
PYPL
$67.1B
| $17.5M | 0.02% | +151,159 | New | +$17.5M |
|
33
Lam Research
LRCX
$127B
| $17M | 0.02% | 31,656 -1,243 | -4% | -$668K |
|
34
Wynn Resorts
WYNN
$13.2B
| $16.9M | 0.02% | +212,158 | New | +$16.9M |
|
35
Mercado Libre
MELI
$125B
| $16.6M | 0.02% | 13,953 +4,654 | +50% | +$5.54M |
|
36
GE Aerospace
GE
$292B
| $15.7M | 0.01% | 172,108 +122,439 | +247% | +$11.2M |
|
37
Royal Caribbean
RCL
$98.7B
| $15.1M | 0.01% | 180,814 -854 | -0.5% | -$71.5K |
|
38
Uber
UBER
$196B
| $15.1M | 0.01% | 422,517 +14,305 | +4% | +$510K |
|
39
Qualcomm
QCOM
$173B
| $15M | 0.01% | 98,043 +50,055 | +104% | +$7.65M |
|
40
Bank of America
BAC
$376B
| $14.9M | 0.01% | 362,385 +228,906 | +171% | +$9.44M |
|
41
VanEck Gold Miners ETF
GDX
$19B
| $14.9M | 0.01% | 388,818 +359,176 | +1,212% | +$13.8M |
|
42
Trade Desk
TTD
$26.7B
| $14.8M | 0.01% | 214,402 -9,998 | -4% | -$692K |
|
43
Xtrackers Harvest CSI 300 China A-Shares ETF
ASHR
$2.34B
| $14.7M | 0.01% | 443,461 +317,521 | +252% | +$10.5M |
|
44
Plug Power
PLUG
$1.81B
| $14.3M | 0.01% | 499,605 +75,803 | +18% | +$2.17M |
|
45
Costco
COST
$418B
| $14.1M | 0.01% | 24,538 +8,806 | +56% | +$5.07M |
|
46
American Airlines Group
AAL
$8.82B
| $14.1M | 0.01% | 773,581 +296,761 | +62% | +$5.42M |
|
47
Marvell Technology
MRVL
$54.2B
| $14M | 0.01% | 194,667 +150,626 | +342% | +$10.8M |
|
48
Intuit
INTU
$186B
| $13.9M | 0.01% | 29,005 +9,059 | +45% | +$4.36M |
|
49
Cameco
CCJ
$33.7B
| $13.6M | 0.01% | 467,668 +374,972 | +405% | +$10.9M |
|
|
SPLK
50
DELISTED
Splunk Inc
SPLK
| $13.6M | 0.01% | 91,514 +70,513 | +336% | +$10.5M |
|