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 | |
|---|---|---|---|---|---|---|
926
PUT
Centene
CNC
$31.5B
| $11.8M | 0.01% |
194,400
-61,900
| -24% | -$3.86M |
|
927
Dell
DELL
$284B
| $11.8M | 0.01% |
102,172
-34,715
| -25% | -$4.36M |
|
928
CALL
Elastic
ESTC
$5.96B
| $11.8M | 0.01% |
118,800
+38,800
| +49% | +$3.59M |
|
929
State Street Utilities Select Sector SPDR ETF
XLU
$24B
| $11.7M | 0.01% |
+309,942
| New | +$12.3M |
|
930
PUT
Yum! Brands
YUM
$40.6B
| $11.7M | 0.01% |
87,100
-14,000
| -14% | -$1.89M |
|
931
PUT
Phillips 66
PSX
$83B
| $11.6M | 0.01% |
102,200
+27,600
| +37% | +$3.51M |
|
932
PUT
GE HealthCare
GEHC
$28.2B
| $11.6M | 0.01% |
148,800
+70,600
| +90% | +$6M |
|
933
CALL
Wingstop
WING
$3.67B
| $11.6M | 0.01% |
40,900
+12,600
| +45% | +$4.28M |
|
934
PUT
Crocs
CROX
$6.58B
| $11.6M | 0.01% |
105,900
-35,300
| -25% | -$4.11M |
|
935
PUT
State Street
STT
$50.6B
| $11.6M | 0.01% |
118,000
+18,900
| +19% | +$1.79M |
|
936
PUT
CarMax
KMX
$8.29B
| $11.6M | 0.01% |
141,400
-182,300
| -56% | -$14.3M |
|
937
PUT
Diamondback Energy
FANG
$57.8B
| $11.6M | 0.01% |
70,500
-1,000
| -1% | -$176K |
|
938
CALL
Pultegroup
PHM
$23.7B
| $11.5M | 0.01% |
106,000
-26,300
| -20% | -$3.41M |
|
939
CALL
Monster Beverage
MNST
$91.5B
| $11.5M | 0.01% |
219,200
+98,300
| +81% | +$5.21M |
|
|
FISV
940
CALL
Fiserv Inc
FISV
$26.6B
| $11.4M | 0.01% |
55,700
-18,300
| -25% | -$3.74M |
|
941
PUT
Planet Fitness
PLNT
$4.29B
| $11.4M | 0.01% |
115,600
+28,500
| +33% | +$2.6M |
|
942
CALL
SAP
SAP
$171B
| $11.4M | 0.01% |
46,400
+18,400
| +66% | +$4.38M |
|
943
Sea Limited
SE
$60.9B
| $11.4M | 0.01% |
+107,412
| New | +$11.3M |
|
944
PUT
General Dynamics
GD
$103B
| $11.4M | 0.01% |
43,200
+1,100
| +3% | +$317K |
|
945
PUT
Sony
SONY
$122B
| $11.4M | 0.01% |
537,100
-245,400
| -31% | -$4.78M |
|
946
CALL
Fastenal
FAST
$53B
| $11.4M | 0.01% |
316,000
+41,200
| +15% | +$1.61M |
|
947
Vale
VALE
$63.1B
| $11.3M | 0.01% |
1,278,040
+924,634
| +262% | +$9.41M |
|
948
PUT
American Tower
AMT
$76.7B
| $11.3M | 0.01% |
61,600
-61,900
| -50% | -$12.8M |
|
949
PUT
NetApp
NTAP
$32.3B
| $11.3M | 0.01% |
97,300
+1,000
| +1% | +$122K |
|
950
PUT
JetBlue
JBLU
$1.86B
| $11.3M | 0.01% |
1,433,100
+289,500
| +25% | +$1.96M |
|
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.