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 | |
|---|---|---|---|---|---|---|
51
DoorDash
DASH
$105B
| $13.6M | 0.01% | 116,014 +105,372 | +990% | +$12.3M |
|
52
Amazon
AMZN
$2.44T
| $13.2M | 0.01% | +4,037 | New | +$13.2M |
|
53
Boeing
BA
$177B
| $12.9M | 0.01% | 67,298 +59,148 | +726% | +$11.3M |
|
54
Moderna
MRNA
$9.37B
| $12.7M | 0.01% | 74,004 +72,754 | +5,820% | +$12.5M |
|
55
Snap
SNAP
$12.1B
| $12.7M | 0.01% | 354,150 +218,577 | +161% | +$7.87M |
|
56
RH
RH
$4.23B
| $12.2M | 0.01% | +37,512 | New | +$12.2M |
|
57
Medtronic
MDT
$119B
| $12M | 0.01% | 108,226 -130,574 | -55% | -$14.5M |
|
58
BP
BP
$90.8B
| $11.7M | 0.01% | 396,593 +84,154 | +27% | +$2.47M |
|
59
Broadcom
AVGO
$1.4T
| $11.6M | 0.01% | 18,466 +6,235 | +51% | +$3.93M |
|
60
Delta Air Lines
DAL
$40.3B
| $11.5M | 0.01% | 291,194 -322,700 | -53% | -$12.8M |
|
61
Starbucks
SBUX
$100B
| $11.2M | 0.01% | 122,764 +5,226 | +4% | +$475K |
|
62
iShares Core S&P 500 ETF
IVV
$662B
| $11.2M | 0.01% | 24,597 +17,869 | +266% | +$8.11M |
|
63
ASML
ASML
$292B
| $11M | 0.01% | 16,466 -2,015 | -11% | -$1.35M |
|
64
Roku
ROKU
$14.2B
| $10.8M | 0.01% | +86,260 | New | +$10.8M |
|
65
DocuSign
DOCU
$15.5B
| $10.8M | 0.01% | 100,725 +82,587 | +455% | +$8.85M |
|
66
Alibaba
BABA
$322B
| $10.7M | 0.01% | 98,048 +42,863 | +78% | +$4.66M |
|
67
Workday
WDAY
$61.6B
| $10.6M | 0.01% | 44,470 +27,100 | +156% | +$6.49M |
|
68
Goldman Sachs
GS
$226B
| $10.6M | 0.01% | 32,252 +32,236 | +201,475% | +$10.6M |
|
69
PepsiCo
PEP
$204B
| $10.2M | 0.01% | +61,055 | New | +$10.2M |
|
70
Western Digital
WDC
$27.9B
| $10.1M | 0.01% | 203,003 +106,630 | +111% | +$5.29M |
|
71
Teva Pharmaceuticals
TEVA
$21.1B
| $10M | 0.01% | 1,068,882 +537,557 | +101% | +$5.05M |
|
72
ArcelorMittal
MT
$25.4B
| $10M | 0.01% | 313,031 +164,502 | +111% | +$5.27M |
|
73
Procter & Gamble
PG
$368B
| $9.84M | 0.01% | 64,366 +11,938 | +23% | +$1.82M |
|
74
BILL Holdings
BILL
$4.72B
| $9.69M | 0.01% | 42,720 +24,696 | +137% | +$5.6M |
|
75
Las Vegas Sands
LVS
$39.6B
| $9.6M | 0.01% | 246,948 -125,090 | -34% | -$4.86M |
|