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 | |
|---|---|---|---|---|---|---|
2126
CALL
KULR Technology Group
KULR
$117M
| $2.16M | ﹤0.01% |
75,950
+62,662
| +472% | +$488K |
|
2127
Sempra
SRE
$60.8B
| $2.15M | ﹤0.01% |
24,553
+21,933
| +837% | +$1.92M |
|
2128
Immunovant
IMVT
$8.09B
| $2.15M | ﹤0.01% |
86,847
+38,656
| +80% | +$1.1M |
|
2129
PUT
Powell Industries
POWL
$8.46B
| $2.15M | ﹤0.01% |
29,100
+20,700
| +246% | +$1.85M |
|
2130
CALL
Western Union
WU
$2.57B
| $2.15M | ﹤0.01% |
202,700
+104,600
| +107% | +$1.16M |
|
2131
PUT
New York Times
NYT
$11.6B
| $2.14M | ﹤0.01% |
41,100
+27,800
| +209% | +$1.52M |
|
|
GES
2132
PUT
DELISTED
Guess Inc
GES
| $2.14M | ﹤0.01% |
152,000
+32,900
| +28% | +$561K |
|
2133
ACM Research
ACMR
$5.83B
| $2.13M | ﹤0.01% |
141,436
+106,610
| +306% | +$1.93M |
|
2134
CALL
Evolv Technologies
EVLV
$943M
| $2.13M | ﹤0.01% |
539,000
-126,900
| -19% | -$445K |
|
2135
CALL
Huntsman Corp
HUN
$2.24B
| $2.13M | ﹤0.01% |
118,100
+27,600
| +30% | +$575K |
|
|
PPLC
2136
PUT
DELISTED
PortfolioPlus S&P 500 ETF
PPLC
| $2.13M | ﹤0.01% |
63,700
+51,200
| +410% | +$1.71M |
|
2137
PUT
CDW
CDW
$17.1B
| $2.12M | ﹤0.01% |
12,200
+11,400
| +1,425% | +$2.21M |
|
2138
PUT
Ascendis Pharma A/S
ASND
$16.7B
| $2.12M | ﹤0.01% |
15,400
+2,100
| +16% | +$276K |
|
2139
PUT
Comfort Systems
FIX
$61B
| $2.12M | ﹤0.01% |
5,000
+1,700
| +52% | +$746K |
|
2140
CALL
Genius Sports
GENI
$1.73B
| $2.12M | ﹤0.01% |
245,000
+135,600
| +124% | +$1.13M |
|
2141
PUT
Penske Automotive Group
PAG
$14.3B
| $2.12M | ﹤0.01% |
13,900
-14,800
| -52% | -$2.35M |
|
2142
PUT
Roivant Sciences
ROIV
$25.2B
| $2.12M | ﹤0.01% |
179,100
-57,200
| -24% | -$676K |
|
2143
CALL
ChargePoint
CHPT
$133M
| $2.11M | ﹤0.01% |
98,760
-53,340
| -35% | -$1.32M |
|
2144
PUT
Plains All American Pipeline
PAA
$17.4B
| $2.11M | ﹤0.01% |
123,700
-90,300
| -42% | -$1.57M |
|
2145
PUT
Upwork
UPWK
$1.09B
| $2.11M | ﹤0.01% |
129,200
+14,900
| +13% | +$215K |
|
2146
CALL
Establishment Labs
ESTA
$2.72B
| $2.1M | ﹤0.01% |
45,700
+22,000
| +93% | +$959K |
|
2147
Deere & Co
DE
$170B
| $2.1M | ﹤0.01% |
+4,968
| New | +$2.09M |
|
2148
CALL
Jones Lang LaSalle
JLL
$15.1B
| $2.1M | ﹤0.01% |
8,300
+6,500
| +361% | +$1.73M |
|
2149
Gogo Inc
GOGO
$515M
| $2.1M | ﹤0.01% |
259,133
+225,677
| +675% | +$1.68M |
|
|
JPGE
2150
PUT
DELISTED
JPMorgan Diversified Return Global Equity ETF
JPGE
| $2.09M | ﹤0.01% |
36,500
+1,100
| +3% | +$63.1K |
|
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.