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 | |
|---|---|---|---|---|---|---|
601
PUT
Darden Restaurants
DRI
$22.2B
| $21.5M | 0.01% |
115,200
-33,000
| -22% | -$5.53M |
|
602
CALL
NXP Semiconductors
NXPI
$70.4B
| $21.4M | 0.01% |
103,200
-51,400
| -33% | -$11.7M |
|
603
CALL
Skyworks Solutions
SWKS
$9.5B
| $21.4M | 0.01% |
241,800
+63,900
| +36% | +$5.81M |
|
604
PUT
Tyson Foods
TSN
$20.1B
| $21.4M | 0.01% |
373,000
+84,400
| +29% | +$5.1M |
|
605
CALL
WillScot Mobile Mini Holdings
WSC
$4.77B
| $21.4M | 0.01% |
639,600
+531,700
| +493% | +$19.5M |
|
606
CALL
ProShares Ether Strategy ETF
EETH
$56.1M
| $21.4M | 0.01% |
585,200
+58,000
| +11% | +$3.56M |
|
607
CALL
Intercontinental Exchange
ICE
$80.6B
| $21.3M | 0.01% |
143,200
-30,000
| -17% | -$4.75M |
|
608
PUT
United Rentals
URI
$64.8B
| $21.3M | 0.01% |
30,200
-14,100
| -32% | -$11.5M |
|
609
PUT
D.R. Horton
DHI
$40.4B
| $21.3M | 0.01% |
152,100
-82,200
| -35% | -$13.7M |
|
610
CALL
iShares Core MSCI Emerging Markets ETF
IEMG
$153B
| $21.2M | 0.01% |
386,100
+101,300
| +36% | +$5.61M |
|
611
PUT
Iris Energy
IREN
$14.8B
| $21.2M | 0.01% |
2,163,600
+466,200
| +27% | +$4.97M |
|
612
CALL
Capri Holdings
CPRI
$1.86B
| $21.2M | 0.01% |
1,007,000
+865,200
| +610% | +$23.5M |
|
613
CALL
Coherent
COHR
$61.1B
| $21.2M | 0.01% |
223,600
-168,900
| -43% | -$16.9M |
|
614
CALL
Marathon Petroleum
MPC
$92.2B
| $21.1M | 0.01% |
151,600
-32,700
| -18% | -$4.99M |
|
615
PUT
PG&E
PCG
$39.9B
| $21.1M | 0.01% |
1,047,200
+542,000
| +107% | +$11M |
|
616
PUT
Chubb
CB
$133B
| $21.1M | 0.01% |
76,300
-37,400
| -33% | -$10.6M |
|
617
CALL
Microchip Technology
MCHP
$46.2B
| $21.1M | 0.01% |
367,500
-64,700
| -15% | -$4.45M |
|
618
PUT
Etsy
ETSY
$7.64B
| $21.1M | 0.01% |
398,400
-37,000
| -8% | -$1.97M |
|
619
PUT
Vertex Pharmaceuticals
VRTX
$120B
| $21M | 0.01% |
52,200
+30,300
| +138% | +$14M |
|
620
CALL
SiriusXM
SIRI
$10B
| $21M | 0.01% |
921,400
-156,300
| -15% | -$3.99M |
|
621
Fortinet
FTNT
$114B
| $21M | 0.01% |
222,215
+109,360
| +97% | +$9.73M |
|
622
CALL
MPLX
MPLX
$57.4B
| $21M | 0.01% |
438,200
+123,900
| +39% | +$5.76M |
|
623
CALL
Analog Devices
ADI
$188B
| $21M | 0.01% |
98,700
-138,100
| -58% | -$30.5M |
|
624
CALL
e.l.f. Beauty
ELF
$4.66B
| $20.9M | 0.01% |
166,700
-29,900
| -15% | -$3.59M |
|
625
CALL
AST SpaceMobile
ASTS
$18.5B
| $20.8M | 0.01% |
987,800
-27,700
| -3% | -$676K |
|
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.