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
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$552M |
| 2 |
Strategy Inc
MSTR
|
+$85.8M |
| 3 |
MSTX
Defiance Daily Target 2x Long MSTR ETF
MSTX
|
+$48.1M |
| 4 |
Intel
INTC
|
+$45.4M |
| 5 |
Uber
UBER
|
+$43M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$133M |
| 2 |
Pinduoduo
PDD
|
+$82.6M |
| 3 |
Boeing
BA
|
+$49.8M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$45.1M |
| 5 |
Microsoft
MSFT
|
+$41M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.68% |
| 2 | Consumer Discretionary | 0.23% |
| 3 | Healthcare | 0.19% |
| 4 | Financials | 0.13% |
| 5 | Communication Services | 0.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
76
CALL
Pinduoduo
PDD
$121B
| $230M | 0.13% |
2,370,600
-165,900
| -7% | -$19.3M |
|
77
PUT
iShares Bitcoin Trust
IBIT
$48.9B
| $230M | 0.13% |
+4,328,100
| New | +$204M |
|
|
78
CALL
Uber
UBER
$146B
| $228M | 0.13% |
3,774,800
+801,800
| +27% | +$57.3M |
|
|
79
CALL
Intel
INTC
$530B
| $227M | 0.13% |
11,340,800
+2,735,100
| +32% | +$61.7M |
|
80
CALL
Proshares UltraShort Technology
REW
$3.27M
| $223M | 0.12% |
1,974,050
+196,450
| +11% | +$8.13M |
|
81
CALL
Walt Disney
DIS
$167B
| $221M | 0.12% |
1,985,200
-363,800
| -15% | -$38.2M |
|
82
CALL
Micron Technology
MU
$1.1T
| $220M | 0.12% |
2,609,100
-773,700
| -23% | -$78.7M |
|
83
CALL
ExxonMobil
XOM
$629B
| $211M | 0.12% |
2,021,900
-58,600
| -3% | -$6.85M |
|
|
UWC
84
CALL
DELISTED
PROSHARES TR ULTRA RUSSELL3000
UWC
| $208M | 0.12% |
2,609,700
+528,900
| +25% | +$42.1M |
|
85
CALL
Applovin
APP
$143B
| $207M | 0.12% |
639,600
+165,200
| +35% | +$41.8M |
|
86
CALL
CrowdStrike
CRWD
$195B
| $204M | 0.11% |
2,388,000
-1,618,800
| -40% | -$135M |
|
87
PUT
Citigroup
C
$216B
| $204M | 0.11% |
2,899,900
-196,500
| -6% | -$13.2M |
|
88
CALL
Super Micro Computer
SMCI
$16.5B
| $204M | 0.11% |
6,683,600
-435,400
| -6% | -$15.8M |
|
89
PUT
Vanguard S&P 500 ETF
VOO
$981B
| $203M | 0.11% |
502,600
-43,800
| -8% | -$23.7M |
|
90
CALL
Visa
V
$677B
| $198M | 0.11% |
626,200
-107,600
| -15% | -$32.4M |
|
91
CALL
ASML
ASML
$692B
| $196M | 0.11% |
282,300
-138,900
| -33% | -$99.7M |
|
|
92
PUT
Micron Technology
MU
$1.1T
| $194M | 0.11% |
2,310,200
-572,200
| -20% | -$58.2M |
|
93
PUT
Bank of America
BAC
$430B
| $193M | 0.11% |
4,382,200
+392,600
| +10% | +$17.3M |
|
94
PUT
Adobe
ADBE
$90.3B
| $190M | 0.11% |
426,300
+83,700
| +24% | +$41.4M |
|
95
CALL
Goldman Sachs
GS
$320B
| $183M | 0.1% |
320,300
+38,900
| +14% | +$21.7M |
|
96
PUT
Wells Fargo
WFC
$261B
| $183M | 0.1% |
2,606,800
+1,040,900
| +66% | +$71.1M |
|
97
PUT
Berkshire Hathaway Class B
BRK.B
$1.06T
| $182M | 0.1% |
402,200
-211,600
| -34% | -$97.7M |
|
|
98
PUT
Visa
V
$677B
| $177M | 0.1% |
558,900
-86,900
| -13% | -$26.1M |
|
99
PUT
PayPal
PYPL
$49.3B
| $175M | 0.1% |
2,050,900
+88,300
| +4% | +$7.42M |
|
100
CALL
Home Depot
HD
$332B
| $175M | 0.1% |
449,500
-50,000
| -10% | -$20.4M |
|
Similar funds
Simplex Trading's Q4 2024 Portfolio in Review
As of Q4 2024, Simplex Trading held 10,008 positions worth $179B, up 4.8% from $170B the previous quarter. Its ten largest holdings account for 49% of the portfolio.
Simplex Trading's Q4 2024 filing shows 1,520 new, 3,222 increased, 3,616 reduced and 1,504 closed positions. Its largest new stake was Strategy Inc: 285,022 shares worth $82.5M. The largest sale was NVIDIA, an estimated $133M.
By sector, the portfolio is most concentrated in Technology at 0.68% of assets, up from 0.4% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q4 2024 buy was Strategy Inc: 285,022 shares worth $82.5M.
- Simplex Trading added most to Apple in Q4 2024, an estimated $552M increase.
- Simplex Trading's biggest Q4 2024 reduction was NVIDIA, cutting an estimated $133M.
- Simplex Trading fully exited Pinduoduo in Q4 2024, selling an estimated $82.6M.
- Simplex Trading's ten largest holdings make up 49% of its $179B portfolio in Q4 2024.
- Simplex Trading opened 1,520 new positions and closed 1,504 in Q4 2024.
- Simplex Trading's portfolio value rose 4.8% quarter-over-quarter to $179B.
Based on Simplex Trading's 13F filing for Q4 2024, filed 11 Feb 2025.