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 | |
|---|---|---|---|---|---|---|
876
Agnico Eagle Mines
AEM
$72.3B
| $13.1M | 0.01% |
167,150
+113,720
| +213% | +$9.37M |
|
877
CALL
Keurig Dr Pepper
KDP
$40.4B
| $13.1M | 0.01% |
406,400
-104,900
| -21% | -$3.55M |
|
878
CALL
BHP
BHP
$212B
| $13M | 0.01% |
266,200
-96,900
| -27% | -$5.27M |
|
879
CALL
GitLab
GTLB
$5.1B
| $13M | 0.01% |
230,400
+35,900
| +18% | +$2.09M |
|
880
PUT
Bath & Body Works
BBWI
$3.9B
| $13M | 0.01% |
334,200
+68,800
| +26% | +$2.3M |
|
881
CALL
Domino's
DPZ
$10.7B
| $12.8M | 0.01% |
30,600
-1,500
| -5% | -$655K |
|
882
CALL
Sunrun
RUN
$2.48B
| $12.8M | 0.01% |
1,388,300
+372,900
| +37% | +$4.63M |
|
883
CALL
Generac Holdings
GNRC
$12.4B
| $12.8M | 0.01% |
82,800
-3,200
| -4% | -$553K |
|
884
CALL
Stryker
SYK
$122B
| $12.8M | 0.01% |
35,600
-75,500
| -68% | -$28M |
|
885
CALL
KeyCorp
KEY
$24.4B
| $12.8M | 0.01% |
747,200
+68,100
| +10% | +$1.22M |
|
886
Direxion Daily TSLA Bull 2X ETF
TSLL
$2.55B
| $12.8M | 0.01% |
465,134
+324,332
| +230% | +$6.44M |
|
|
887
PUT
Generac Holdings
GNRC
$12.4B
| $12.8M | 0.01% |
82,400
+10,500
| +15% | +$1.81M |
|
888
CALL
Transocean
RIG
$5.89B
| $12.7M | 0.01% |
3,397,300
+634,500
| +23% | +$2.64M |
|
889
CALL
Alcoa
AA
$11.9B
| $12.7M | 0.01% |
336,500
+92,000
| +38% | +$3.82M |
|
890
PUT
Monolithic Power Systems
MPWR
$68.6B
| $12.7M | 0.01% |
21,400
+16,600
| +346% | +$12M |
|
891
CALL
Sony
SONY
$122B
| $12.6M | 0.01% |
597,500
+47,500
| +9% | +$925K |
|
892
PUT
Xtrackers MSCI Emerging Markets Hedged Equity ETF
DBEM
$107M
| $12.6M | 0.01% |
476,900
+128,800
| +37% | +$3.33M |
|
893
PUT
Advance Auto Parts
AAP
$3.22B
| $12.6M | 0.01% |
266,200
-22,300
| -8% | -$908K |
|
894
CALL
Suncor Energy
SU
$78.4B
| $12.6M | 0.01% |
352,800
+7,000
| +2% | +$269K |
|
|
METD
895
PUT
Direxion Daily META Bear 1X ETF
METD
$8.38M
| $12.6M | 0.01% |
188,500
+173,900
| +1,191% | +$3.48M |
|
896
CALL
Centene
CNC
$31.5B
| $12.5M | 0.01% |
206,000
+43,100
| +26% | +$2.69M |
|
897
CALL
BioNTech
BNTX
$23.3B
| $12.5M | 0.01% |
109,400
-31,200
| -22% | -$3.56M |
|
898
Coca-Cola
KO
$349B
| $12.4M | 0.01% |
+199,658
| New | +$13M |
|
|
899
PUT
Keurig Dr Pepper
KDP
$40.4B
| $12.4M | 0.01% |
384,800
+183,400
| +91% | +$6.21M |
|
900
PUT
Samsara
IOT
$18.3B
| $12.3M | 0.01% |
282,000
+127,000
| +82% | +$6.25M |
|
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.