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 | |
|---|---|---|---|---|---|---|
1601
PUT
Compass Minerals
CMP
$1.24B
| $4.25M | ﹤0.01% |
377,400
+372,000
| +6,889% | +$4.86M |
|
1602
VICI Properties
VICI
$29.4B
| $4.22M | ﹤0.01% |
+144,600
| New | +$4.57M |
|
1603
CALL
Red Cat Holdings
RCAT
$1.16B
| $4.22M | ﹤0.01% |
328,200
+300,900
| +1,102% | +$1.84M |
|
1604
CALL
Plug Power
PLUG
$2.92B
| $4.21M | ﹤0.01% |
1,978,400
+76,100
| +4% | +$166K |
|
1605
Futu Holdings
FUTU
$13.9B
| $4.21M | ﹤0.01% |
52,667
+39,749
| +308% | +$3.72M |
|
1606
PUT
Centrus Energy
LEU
$3.22B
| $4.19M | ﹤0.01% |
62,900
-200
| -0.3% | -$15.6K |
|
1607
PUT
JB Hunt Transport Services
JBHT
$27.1B
| $4.18M | ﹤0.01% |
24,500
-9,300
| -28% | -$1.66M |
|
1608
CALL
Ball Corp
BALL
$17B
| $4.18M | ﹤0.01% |
75,800
-17,000
| -18% | -$1.04M |
|
1609
CALL
Pitney Bowes
PBI
$2.42B
| $4.18M | ﹤0.01% |
577,200
+117,500
| +26% | +$873K |
|
1610
PUT
Quanta Services
PWR
$93.9B
| $4.17M | ﹤0.01% |
13,200
-33,000
| -71% | -$10.6M |
|
1611
Dick's Sporting Goods
DKS
$18.4B
| $4.16M | ﹤0.01% |
+18,196
| New | +$3.82M |
|
1612
Lumen
LUMN
$6.53B
| $4.16M | ﹤0.01% |
784,136
+505,134
| +181% | +$3.49M |
|
1613
PUT
BridgeBio Pharma
BBIO
$16.5B
| $4.16M | ﹤0.01% |
151,500
+13,100
| +9% | +$339K |
|
1614
PUT
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
$27B
| $4.16M | ﹤0.01% |
7,300
-3,200
| -30% | -$1.88M |
|
1615
CALL
United States Gasoline Fund
UGA
$142M
| $4.15M | ﹤0.01% |
65,900
+64,800
| +5,891% | +$4.01M |
|
1616
PUT
Kohl's
KSS
$2.03B
| $4.14M | ﹤0.01% |
294,700
-254,300
| -46% | -$4.38M |
|
1617
NuScale Power
SMR
$2.8B
| $4.14M | ﹤0.01% |
+230,785
| New | +$4.76M |
|
1618
PUT
ACM Research
ACMR
$5.83B
| $4.13M | ﹤0.01% |
273,800
+226,300
| +476% | +$4.09M |
|
1619
PUT
Crown Castle
CCI
$32.7B
| $4.11M | ﹤0.01% |
45,300
-72,200
| -61% | -$7.55M |
|
1620
Merck
MRK
$324B
| $4.11M | ﹤0.01% |
+41,291
| New | +$4.26M |
|
|
EMBJ
1621
PUT
Embraer S.A. ADS
EMBJ
$11.6B
| $4.1M | ﹤0.01% |
111,900
+21,300
| +24% | +$767K |
|
1622
Tesla
TSLA
$1.24T
| $4.1M | ﹤0.01% |
+10,164
| New | +$3.27M |
|
|
1623
CALL
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
$27B
| $4.1M | ﹤0.01% |
7,200
+4,300
| +148% | +$2.52M |
|
1624
CALL
FMC
FMC
$1.42B
| $4.09M | ﹤0.01% |
84,200
+13,600
| +19% | +$794K |
|
1625
CALL
Floor & Decor
FND
$5.81B
| $4.09M | ﹤0.01% |
41,000
-71,300
| -63% | -$7.66M |
|
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.