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 | |
|---|---|---|---|---|---|---|
3876
PUT
Nuvation Bio
NUVB
$2.33B
| $359K | ﹤0.01% |
135,200
-2,100
| -2% | -$5.41K |
|
3877
CALL
Varonis Systems
VRNS
$5.13B
| $359K | ﹤0.01% |
8,100
-5,500
| -40% | -$286K |
|
3878
CALL
Petco
WOOF
$811M
| $359K | ﹤0.01% |
94,400
-116,500
| -55% | -$527K |
|
3879
CALL
CrossAmerica Partners
CAPL
$839M
| $358K | ﹤0.01% |
16,300
+1,500
| +10% | +$31.7K |
|
3880
CALL
Helmerich & Payne
HP
$3.31B
| $358K | ﹤0.01% |
11,200
+8,000
| +250% | +$272K |
|
3881
CALL
Kontoor Brands
KTB
$4.87B
| $358K | ﹤0.01% |
4,200
+2,900
| +223% | +$249K |
|
3882
Marten Transport
MRTN
$1.25B
| $358K | ﹤0.01% |
22,972
+21,373
| +1,337% | +$356K |
|
3883
CALL
Brown & Brown
BRO
$25B
| $357K | ﹤0.01% |
3,500
-42,500
| -92% | -$4.54M |
|
3884
CALL
Lithia Motors
LAD
$8.17B
| $357K | ﹤0.01% |
1,000
-8,600
| -90% | -$3.03M |
|
3885
CALL
Church & Dwight Co
CHD
$23.7B
| $356K | ﹤0.01% |
3,400
+2,500
| +278% | +$264K |
|
3886
RCI Hospitality Holdings
RICK
$203M
| $356K | ﹤0.01% |
6,201
-1,770
| -22% | -$86.4K |
|
|
TRTX
3887
TPG RE Finance Trust
TRTX
$660M
| $356K | ﹤0.01% |
41,948
+25,159
| +150% | +$219K |
|
3888
CALL
TETRA Technologies
TTI
$1.07B
| $356K | ﹤0.01% |
99,600
+69,600
| +232% | +$247K |
|
3889
CALL
EverQuote
EVER
$960M
| $355K | ﹤0.01% |
17,800
-6,600
| -27% | -$125K |
|
3890
Fossil Group
FOSL
$262M
| $355K | ﹤0.01% |
212,862
+121,966
| +134% | +$178K |
|
|
ETHT
3891
ProShares Ultra Ether ETF
ETHT
$204M
| $355K | ﹤0.01% |
3,260
+3,198
| +5,158% | +$327K |
|
3892
CALL
ArcBest
ARCB
$3.33B
| $354K | ﹤0.01% |
3,800
-3,200
| -46% | -$338K |
|
3893
Invesco Mortgage Capital
IVR
$769M
| $354K | ﹤0.01% |
44,085
-8,276
| -16% | -$69.5K |
|
3894
PUT
Kulicke & Soffa
KLIC
$4.76B
| $354K | ﹤0.01% |
7,600
-200
| -3% | -$9.38K |
|
3895
CALL
Spectrum Brands
SPB
$2.08B
| $354K | ﹤0.01% |
4,200
-200
| -5% | -$18.1K |
|
3896
PUT
PagSeguro Digital
PAGS
$2.69B
| $353K | ﹤0.01% |
56,400
-170,700
| -75% | -$1.31M |
|
|
SAND
3897
CALL
DELISTED
Sandstorm Gold
SAND
| $353K | ﹤0.01% |
63,400
-17,200
| -21% | -$99.8K |
|
3898
PUT
THOR Low Volatility ETF
THLV
$57.8M
| $352K | ﹤0.01% |
+12,800
| New | +$368K |
|
3899
CALL
Velocity Financial
VEL
$698M
| $352K | ﹤0.01% |
18,000
-50,600
| -74% | -$1.01M |
|
|
CTEV
3900
Claritev Corp
CTEV
$386M
| $352K | ﹤0.01% |
23,861
+23,688
| +13,692% | +$209K |
|
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.