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 | |
|---|---|---|---|---|---|---|
501
PUT
Vale
VALE
$63.2B
| $26.7M | 0.01% |
3,008,000
+1,483,800
| +97% | +$15.1M |
|
502
PUT
Cheniere Energy
LNG
$56B
| $26.6M | 0.01% |
123,900
+33,100
| +36% | +$6.72M |
|
503
PUT
HubSpot
HUBS
$10.5B
| $26.6M | 0.01% |
38,200
-9,000
| -19% | -$5.79M |
|
504
PUT
Comcast
CMCSA
$84B
| $26.6M | 0.01% |
709,100
-409,900
| -37% | -$17M |
|
505
CALL
Enphase Energy
ENPH
$5.22B
| $26.6M | 0.01% |
386,900
+62,000
| +19% | +$4.92M |
|
506
PUT
DexCom
DXCM
$27.6B
| $26.6M | 0.01% |
341,600
-26,400
| -7% | -$1.95M |
|
|
FISV
507
PUT
Fiserv Inc
FISV
$26.8B
| $26.5M | 0.01% |
129,200
+49,100
| +61% | +$10M |
|
|
METD
508
CALL
Direxion Daily META Bear 1X ETF
METD
$8.11M
| $26.5M | 0.01% |
423,400
+368,300
| +668% | +$7.36M |
|
509
PUT
Best Buy
BBY
$18.4B
| $26.4M | 0.01% |
307,300
-13,200
| -4% | -$1.2M |
|
510
PUT
C3.ai
AI
$1.27B
| $26.3M | 0.01% |
763,200
+67,800
| +10% | +$2.1M |
|
511
PUT
CF Industries
CF
$19.6B
| $26.3M | 0.01% |
307,800
+3,100
| +1% | +$268K |
|
512
CALL
Dominion Energy
D
$62.5B
| $26.2M | 0.01% |
486,100
+77,300
| +19% | +$4.41M |
|
513
CALL
HCA Healthcare
HCA
$82.5B
| $26.1M | 0.01% |
87,100
+33,800
| +63% | +$11.8M |
|
514
CALL
AstraZeneca
AZN
$263B
| $26.1M | 0.01% |
199,450
+61,050
| +44% | +$8.55M |
|
515
CALL
CleanSpark
CLSK
$3.93B
| $25.9M | 0.01% |
2,811,300
+517,800
| +23% | +$6.26M |
|
516
CALL
Southwest Airlines
LUV
$23.3B
| $25.9M | 0.01% |
769,300
-76,200
| -9% | -$2.43M |
|
517
PUT
Alcoa
AA
$12.2B
| $25.7M | 0.01% |
681,400
+28,400
| +4% | +$1.18M |
|
518
CALL
CAVA Group
CAVA
$7.26B
| $25.5M | 0.01% |
226,300
-123,800
| -35% | -$16.5M |
|
519
Newmont
NEM
$102B
| $25.3M | 0.01% |
679,212
+488,435
| +256% | +$22.3M |
|
520
CALL
Las Vegas Sands
LVS
$30B
| $25.3M | 0.01% |
492,100
-390,400
| -44% | -$20.2M |
|
|
521
CALL
Cheniere Energy
LNG
$56B
| $25.2M | 0.01% |
117,500
-35,400
| -23% | -$7.19M |
|
522
PUT
Simon Property Group
SPG
$73.4B
| $25.2M | 0.01% |
146,500
+43,500
| +42% | +$7.63M |
|
523
Humana
HUM
$47.7B
| $25.1M | 0.01% |
98,895
+46,077
| +87% | +$12.4M |
|
524
CALL
Edwards Lifesciences
EW
$48.6B
| $24.8M | 0.01% |
335,500
-5,200
| -2% | -$364K |
|
525
CALL
Williams Companies
WMB
$91.1B
| $24.8M | 0.01% |
458,100
-234,200
| -34% | -$12.6M |
|
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.