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 | |
|---|---|---|---|---|---|---|
2751
PUT
New Oriental
EDU
$7.84B
| $1.09M | ﹤0.01% |
17,000
-5,100
| -23% | -$327K |
|
2752
Evolv Technologies
EVLV
$943M
| $1.09M | ﹤0.01% |
276,085
-168,516
| -38% | -$591K |
|
2753
Cirrus Logic
CRUS
$6.74B
| $1.09M | ﹤0.01% |
+10,933
| New | +$1.2M |
|
2754
PUT
Vermilion Energy
VET
$1.73B
| $1.09M | ﹤0.01% |
115,800
+36,900
| +47% | +$360K |
|
2755
PUT
Zebra Technologies
ZBRA
$12.4B
| $1.08M | ﹤0.01% |
2,800
+2,000
| +250% | +$775K |
|
2756
Dropbox
DBX
$6.81B
| $1.08M | ﹤0.01% |
35,963
-29,981
| -45% | -$828K |
|
2757
CALL
West Pharmaceutical
WST
$23.1B
| $1.08M | ﹤0.01% |
3,300
-5,200
| -61% | -$1.64M |
|
2758
CALL
Hamilton Insurance Group
HG
$3.59B
| $1.08M | ﹤0.01% |
56,700
+45,100
| +389% | +$835K |
|
2759
Tradr 1.25X NVDA Bear Daily ETF
NVDS
$16.5M
| $1.08M | ﹤0.01% |
14,159
+1,221
| +9% | +$103K |
|
2760
PUT
Acadia Healthcare
ACHC
$3.17B
| $1.07M | ﹤0.01% |
27,100
-30,600
| -53% | -$1.38M |
|
2761
Nextpower Inc
NXT
$15.2B
| $1.07M | ﹤0.01% |
29,407
-13,067
| -31% | -$479K |
|
|
KALV
2762
PUT
DELISTED
KalVista Pharmaceuticals
KALV
| $1.07M | ﹤0.01% |
126,800
+125,600
| +10,467% | +$1.3M |
|
2763
PUT
Bitwise Bitcoin ETF
BITB
$2.46B
| $1.07M | ﹤0.01% |
+21,100
| New | +$954K |
|
2764
CALL
Axos Financial
AX
$5.45B
| $1.07M | ﹤0.01% |
15,300
-13,200
| -46% | -$964K |
|
2765
EPAM Systems
EPAM
$4.69B
| $1.07M | ﹤0.01% |
4,569
+707
| +18% | +$157K |
|
2766
CALL
Shoals Technologies Group
SHLS
$1.58B
| $1.07M | ﹤0.01% |
193,300
+37,100
| +24% | +$188K |
|
2767
Corebridge Financial
CRBG
$14.1B
| $1.07M | ﹤0.01% |
+35,677
| New | +$1.1M |
|
2768
PUT
O'Reilly Automotive
ORLY
$72.4B
| $1.07M | ﹤0.01% |
13,500
-28,500
| -68% | -$2.3M |
|
2769
CALL
Teleflex
TFX
$5.85B
| $1.07M | ﹤0.01% |
6,000
+3,800
| +173% | +$780K |
|
2770
FirstEnergy
FE
$28.9B
| $1.07M | ﹤0.01% |
+26,809
| New | +$1.12M |
|
|
HIMX
2771
PUT
Himax Technologies
HIMX
$2.2B
| $1.07M | ﹤0.01% |
132,600
+23,500
| +22% | +$148K |
|
2772
FTAI Aviation
FTAI
$22.2B
| $1.06M | ﹤0.01% |
+7,399
| New | +$1.09M |
|
2773
CALL
Sociedad Química y Minera de Chile
SQM
$19.6B
| $1.06M | ﹤0.01% |
29,300
-3,000
| -9% | -$117K |
|
2774
CALL
Ameriprise Financial
AMP
$46.8B
| $1.06M | ﹤0.01% |
2,000
+400
| +25% | +$213K |
|
2775
PUT
FuelCell Energy
FCEL
$1.7B
| $1.06M | ﹤0.01% |
117,800
+115,257
| +4,532% | +$1.14M |
|
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.