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 | |
|---|---|---|---|---|---|---|
6776
PUT
Supernus Pharmaceuticals
SUPN
$2.65B
| $18K | ﹤0.01% |
500
+400
| +400% | +$14.1K |
|
6777
CALL
Triple Flag Precious Metals
TFPM
$6.12B
| $18K | ﹤0.01% |
1,200
+700
| +140% | +$11.6K |
|
6778
ProShares Ultra Real Estate
URE
$58.4M
| $18K | ﹤0.01% |
+293
| New | +$20.8K |
|
6779
PUT
Utz Brands
UTZ
$1.25B
| $18K | ﹤0.01% |
+1,200
| New | +$20.3K |
|
6780
CALL
Varex Imaging
VREX
$467M
| $18K | ﹤0.01% |
+1,300
| New | +$18.2K |
|
6781
PUT
Zai Lab
ZLAB
$2.06B
| $18K | ﹤0.01% |
700
-81,600
| -99% | -$2.27M |
|
|
LUCK
6782
CALL
Lucky Strike Entertainment
LUCK
$959M
| $18K | ﹤0.01% |
1,800
-4,500
| -71% | -$51.6K |
|
|
DM
6783
DELISTED
Desktop Metal, Inc.
DM
| $18K | ﹤0.01% |
8,029
-2,241
| -22% | -$9.49K |
|
|
AEVA
6784
CALL
Aeva Technologies
AEVA
$1.13B
| $17K | ﹤0.01% |
3,700
-2,500
| -40% | -$10.1K |
|
6785
PUT
Ares Management
ARES
$28B
| $17K | ﹤0.01% |
100
-7,700
| -99% | -$1.31M |
|
6786
CALL
ARKO Corp
ARKO
$903M
| $17K | ﹤0.01% |
2,600
-13,700
| -84% | -$94.4K |
|
|
AVNS
6787
PUT
DELISTED
Avanos Medical
AVNS
| $17K | ﹤0.01% |
1,100
+800
| +267% | +$15.8K |
|
6788
CALL
Barrett Business Services
BBSI
$982M
| $17K | ﹤0.01% |
400
-1,500
| -79% | -$60.6K |
|
6789
PUT
BJ's Restaurants
BJRI
$1.56B
| $17K | ﹤0.01% |
500
+400
| +400% | +$14.2K |
|
6790
CALL
Black Hills Corp
BKH
$5.5B
| $17K | ﹤0.01% |
300
-500
| -63% | -$30.4K |
|
|
CAF
6791
CALL
Morgan Stanley China A Share Fund
CAF
$325M
| $17K | ﹤0.01% |
+1,400
| New | +$18.2K |
|
6792
Cullinan Oncology
CGEM
$1.08B
| $17K | ﹤0.01% |
1,403
-6,220
| -82% | -$89.4K |
|
6793
PUT
Cognex
CGNX
$10.4B
| $17K | ﹤0.01% |
500
-300
| -38% | -$11.8K |
|
6794
Chesapeake Utilities
CPK
$3.2B
| $17K | ﹤0.01% |
144
+85
| +144% | +$10.5K |
|
|
CVAC
6795
PUT
DELISTED
CureVac
CVAC
| $17K | ﹤0.01% |
5,100
-10,500
| -67% | -$30.3K |
|
6796
PUT
CryoPort
CYRX
$773M
| $17K | ﹤0.01% |
2,200
-6,800
| -76% | -$50.7K |
|
6797
CALL
Future Fuel
FF
$218M
| $17K | ﹤0.01% |
3,400
-22,800
| -87% | -$127K |
|
|
FL
6798
DELISTED
Foot Locker
FL
| $17K | ﹤0.01% |
817
-145,877
| -99% | -$3.41M |
|
|
FLIC
6799
CALL
DELISTED
First of Long Island Corp
FLIC
| $17K | ﹤0.01% |
1,500
+400
| +36% | +$5.34K |
|
6800
CALL
Global Net Lease
GNL
$1.86B
| $17K | ﹤0.01% |
2,400
-12,300
| -84% | -$94.5K |
|
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.