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 | |
|---|---|---|---|---|---|---|
5351
CALL
Quest Resource Holding
QRHC
$26.8M
| $83K | ﹤0.01% |
12,800
| – | – |
|
5352
CALL
Simulations Plus
SLP
$369M
| $83K | ﹤0.01% |
3,000
+2,800
| +1,400% | +$85.2K |
|
5353
CALL
Savara
SVRA
$1.12B
| $83K | ﹤0.01% |
27,100
-200
| -0.7% | -$697 |
|
5354
CALL
Vanda Pharmaceuticals
VNDA
$307M
| $83K | ﹤0.01% |
17,400
-11,800
| -40% | -$56.7K |
|
5355
Petco
WOOF
$797M
| $83K | ﹤0.01% |
21,858
-54,356
| -71% | -$246K |
|
5356
PUT
Establishment Labs
ESTA
$2.72B
| $82K | ﹤0.01% |
1,800
-10,300
| -85% | -$449K |
|
5357
4D Molecular Therapeutics
FDMT
$532M
| $82K | ﹤0.01% |
+14,731
| New | +$116K |
|
5358
Energy Vault
NRGV
$517M
| $82K | ﹤0.01% |
+36,134
| New | +$59.9K |
|
5359
UPAR Ultra Risk Parity ETF
UPAR
$58.6M
| $82K | ﹤0.01% |
+6,390
| New | +$89.1K |
|
|
YALA
5360
CALL
Yalla Group
YALA
$818M
| $82K | ﹤0.01% |
20,400
+7,600
| +59% | +$32.7K |
|
|
ABX
5361
Abacus Global Management
ABX
$989M
| $81K | ﹤0.01% |
+10,397
| New | +$89.1K |
|
5362
PUT
ALX Oncology
ALXO
$261M
| $81K | ﹤0.01% |
49,000
+32,300
| +193% | +$49.7K |
|
5363
CALL
InfraCap MLP ETF
AMZA
$470M
| $81K | ﹤0.01% |
2,600
+300
| +13% | +$12.7K |
|
5364
PUT
Andersons Inc
ANDE
$2.41B
| $81K | ﹤0.01% |
2,000
-1,600
| -44% | -$74.2K |
|
5365
CALL
Arhaus
ARHS
$1.05B
| $81K | ﹤0.01% |
8,700
-19,700
| -69% | -$193K |
|
5366
CALL
AZZ Inc
AZZ
$4.35B
| $81K | ﹤0.01% |
+1,000
| New | +$84.7K |
|
5367
CALL
Brighthouse Financial
BHF
$3.56B
| $81K | ﹤0.01% |
1,700
-4,900
| -74% | -$239K |
|
|
5368
PUT
Brighthouse Financial
BHF
$3.56B
| $81K | ﹤0.01% |
1,700
-300
| -15% | -$14.7K |
|
5369
PUT
Blackbaud
BLKB
$1.94B
| $81K | ﹤0.01% |
1,100
-1,200
| -52% | -$98.2K |
|
5370
CALL
Grupo Cibest SA
CIB
$22B
| $81K | ﹤0.01% |
2,600
+2,300
| +767% | +$74.1K |
|
5371
CALL
Comtech Telecommunications
CMTL
$50.3M
| $81K | ﹤0.01% |
20,200
-107,100
| -84% | -$383K |
|
5372
Castle Biosciences
CSTL
$855M
| $81K | ﹤0.01% |
3,064
-8,940
| -74% | -$272K |
|
5373
PUT
CVRx
CVRX
$137M
| $81K | ﹤0.01% |
6,400
+1,400
| +28% | +$17.3K |
|
5374
Extra Space Storage
EXR
$31.3B
| $81K | ﹤0.01% |
545
-2,746
| -83% | -$450K |
|
5375
PUT
First Interstate BancSystem
FIBK
$3.69B
| $81K | ﹤0.01% |
2,500
+2,200
| +733% | +$71.6K |
|
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.