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 Dow Jones Industrial Average ETF Trust
DIA
|
$32.1M |
| 2 |
PARA
Paramount Global Class B
PARA
|
$23.3M |
| 3 |
Pinduoduo
PDD
|
$17.3M |
| 4 |
Pfizer
PFE
|
$16.8M |
| 5 |
American Airlines Group
AAL
|
$14.5M |
Top Sells
| 1 |
Amazon
AMZN
|
$64.4M |
| 2 |
Alphabet (Google) Class C
GOOG
|
$38.1M |
| 3 |
AutoZone
AZO
|
$32.2M |
| 4 |
SPDR S&P 500 ETF Trust
SPY
|
$25.3M |
| 5 |
Apple
AAPL
|
$22.5M |
Sector Composition
| 1 | Technology | 20.25% |
| 2 | Consumer Discretionary | 15.22% |
| 3 | Healthcare | 10.03% |
| 4 | Financials | 9.2% |
| 5 | Industrials | 9.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
51
American Tower
AMT
$95.5B
| $5.92M | 0.01% | 24,779 +7,887 | +47% | +$1.89M |
|
52
Enphase Energy
ENPH
$4.93B
| $5.91M | 0.01% | 36,439 +23,237 | +176% | +$3.77M |
|
53
Direxion Daily Small Cap Bull 3x Shares
TNA
$2.18B
| $5.86M | 0.01% | 65,460 +63,870 | +4,017% | +$5.72M |
|
|
54
SPDR S&P 500 ETF Trust
SPY
$658B
| $5.83M | 0.01% | 14,718 -63,912 | -81% | -$25.3M |
|
55
Schlumberger
SLB
$55B
| $5.81M | 0.01% | 213,585 +35,415 | +20% | +$963K |
|
|
DISCA
56
DELISTED
Discovery, Inc. Series A Common Stock
DISCA
| $5.79M | 0.01% | 133,319 +127,398 | +2,152% | +$5.54M |
|
|
WBA
57
DELISTED
Walgreens Boots Alliance
WBA
| $5.78M | 0.01% | 105,244 -42,693 | -29% | -$2.34M |
|
58
Zoom
ZM
$24.4B
| $5.69M | 0.01% | 17,713 +17,658 | +32,105% | +$5.67M |
|
59
Bank of America
BAC
$376B
| $5.69M | 0.01% | 147,007 +142,327 | +3,041% | +$5.51M |
|
60
JD.com
JD
$44.1B
| $5.64M | 0.01% | 66,923 +22,140 | +49% | +$1.87M |
|
61
PayPal
PYPL
$67.1B
| $5.6M | 0.01% | +23,052 | New | +$5.6M |
|
|
FTCH
62
DELISTED
Farfetch Limited Class A Ordinary Shares
FTCH
| $5.57M | 0.01% | 105,110 +87,001 | +480% | +$4.61M |
|
63
Beyond Meat
BYND
$192M
| $5.55M | 0.01% | 42,650 -19,019 | -31% | -$2.47M |
|
|
ALXN
64
DELISTED
Alexion Pharmaceuticals Inc
ALXN
| $5.44M | 0.01% | 35,556 -46,581 | -57% | -$7.12M |
|
65
KraneShares CSI China Internet ETF
KWEB
$8.49B
| $5.41M | 0.01% | +70,809 | New | +$5.41M |
|
66
Peloton Interactive
PTON
$3.1B
| $5.4M | 0.01% | +47,982 | New | +$5.4M |
|
67
Nokia
NOK
$23.1B
| $5.32M | 0.01% | 1,343,769 +1,243,948 | +1,246% | +$4.93M |
|
68
Cisco
CSCO
$274B
| $5.24M | 0.01% | 101,382 -156,312 | -61% | -$8.08M |
|
69
Bristol-Myers Squibb
BMY
$96B
| $5.22M | 0.01% | 82,740 -33,996 | -29% | -$2.15M |
|
70
Datadog
DDOG
$47.7B
| $5.15M | 0.01% | 61,834 +28,743 | +87% | +$2.4M |
|
|
71
Apple
AAPL
$3.45T
| $5.1M | 0.01% | 41,755 -183,892 | -81% | -$22.5M |
|
72
Novavax
NVAX
$1.21B
| $5.05M | 0.01% | 27,851 -10,451 | -27% | -$1.89M |
|
73
Tencent Music
TME
$37.8B
| $4.98M | 0.01% | +243,272 | New | +$4.98M |
|
74
Zscaler
ZS
$43.1B
| $4.98M | 0.01% | +29,026 | New | +$4.98M |
|
75
iShares MSCI Australia ETF
EWA
$1.54B
| $4.97M | 0.01% | 200,510 +31,336 | +19% | +$777K |
|