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 | |
|---|---|---|---|---|---|---|
551
CALL
Synopsys
SNPS
$72.3B
| $23.5M | 0.01% |
48,500
-4,700
| -9% | -$2.46M |
|
552
CALL
United Rentals
URI
$64.8B
| $23.5M | 0.01% |
33,400
-8,000
| -19% | -$6.5M |
|
|
SCIU
553
CALL
DELISTED
Global X Scientific Beta US ETF
SCIU
| $23.4M | 0.01% |
846,400
-83,900
| -9% | -$2.32M |
|
554
PUT
Williams-Sonoma
WSM
$26.2B
| $23.4M | 0.01% |
126,400
+51,500
| +69% | +$8.17M |
|
555
PUT
Analog Devices
ADI
$188B
| $23.4M | 0.01% |
110,100
-72,700
| -40% | -$16.1M |
|
556
CALL
Toast
TOST
$16.9B
| $23.3M | 0.01% |
640,600
+129,200
| +25% | +$4.54M |
|
557
CALL
VF Corp
VFC
$6.74B
| $23.3M | 0.01% |
1,087,900
+528,400
| +94% | +$10.8M |
|
558
CALL
Expedia Group
EXPE
$31.3B
| $23.3M | 0.01% |
125,200
+18,700
| +18% | +$3.22M |
|
|
TLN
559
CALL
Talen Energy Corp
TLN
$18B
| $23.3M | 0.01% |
115,600
+103,400
| +848% | +$20.2M |
|
560
CALL
MGM Resorts International
MGM
$11.6B
| $23.3M | 0.01% |
671,900
-132,600
| -16% | -$5.01M |
|
561
PUT
EOG Resources
EOG
$76.7B
| $23.3M | 0.01% |
189,700
-132,700
| -41% | -$17M |
|
|
WBA
562
PUT
DELISTED
Walgreens Boots Alliance
WBA
| $23.2M | 0.01% |
2,490,200
+123,500
| +5% | +$1.15M |
|
563
CALL
Li Auto
LI
$12B
| $23.2M | 0.01% |
966,800
-227,000
| -19% | -$5.63M |
|
564
Energy Transfer Partners
ET
$70.1B
| $23.1M | 0.01% |
1,178,669
+617,987
| +110% | +$10.9M |
|
565
PUT
AST SpaceMobile
ASTS
$18.5B
| $23.1M | 0.01% |
1,092,700
+128,500
| +13% | +$3.14M |
|
566
CALL
Interactive Brokers
IBKR
$41.7B
| $23M | 0.01% |
521,600
+238,400
| +84% | +$10M |
|
|
AXON
567
CALL
Axon Enterprise
AXON
$39.6B
| $23M | 0.01% |
38,700
-1,400
| -3% | -$762K |
|
568
PUT
eBay
EBAY
$49.3B
| $23M | 0.01% |
370,800
-137,100
| -27% | -$8.71M |
|
569
Arm
ARM
$303B
| $22.9M | 0.01% |
185,802
-81,947
| -31% | -$11.6M |
|
570
PUT
Marathon Petroleum
MPC
$92.2B
| $22.8M | 0.01% |
163,700
-11,700
| -7% | -$1.79M |
|
571
CALL
Cameco
CCJ
$39.4B
| $22.7M | 0.01% |
441,400
-647,900
| -59% | -$35.3M |
|
572
CALL
Becton Dickinson
BDX
$42.2B
| $22.6M | 0.01% |
99,600
+74,300
| +294% | +$17.2M |
|
573
CALL
Hewlett Packard
HPE
$63.7B
| $22.6M | 0.01% |
1,058,200
-355,900
| -25% | -$7.51M |
|
574
CALL
Iris Energy
IREN
$14.8B
| $22.6M | 0.01% |
2,300,200
+1,314,200
| +133% | +$14M |
|
575
CALL
Mobileye
MBLY
$7.39B
| $22.5M | 0.01% |
1,129,400
+334,700
| +42% | +$5.27M |
|
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.