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 | |
|---|---|---|---|---|---|---|
26
PUT
Broadcom
AVGO
$1.84T
| $891M | 0.5% |
4,031,400
+611,300
| +18% | +$113M |
|
|
27
CALL
Broadcom
AVGO
$1.84T
| $845M | 0.47% |
3,645,600
+7,600
| +0.2% | +$1.41M |
|
28
CALL
Alibaba
BABA
$283B
| $804M | 0.45% |
9,919,000
+735,400
| +8% | +$69.5M |
|
29
PUT
Netflix
NFLX
$286B
| $789M | 0.44% |
9,189,000
+230,000
| +3% | +$18.9M |
|
30
PUT
SPDR Gold Trust
GLD
$132B
| $772M | 0.43% |
3,488,400
-684,300
| -16% | -$168M |
|
31
CALL
Advanced Micro Devices
AMD
$888B
| $724M | 0.41% |
5,992,800
+1,956,300
| +48% | +$281M |
|
32
CALL
Booking.com
BKNG
$139B
| $653M | 0.37% |
3,612,500
-755,000
| -17% | -$145M |
|
|
33
Apple
AAPL
$4.81T
| $622M | 0.35% |
2,484,516
+2,341,403
| +1,636% | +$552M |
|
|
34
PUT
Booking.com
BKNG
$139B
| $609M | 0.34% |
3,062,500
+210,000
| +7% | +$40.4M |
|
35
CALL
Palantir
PLTR
$318B
| $584M | 0.33% |
7,728,200
+416,000
| +6% | +$24.2M |
|
36
CALL
VanEck Gold Miners ETF
GDX
$22.7B
| $584M | 0.33% |
7,417,800
-199,100
| -3% | -$7.64M |
|
|
37
PUT
VanEck Gold Miners ETF
GDX
$22.7B
| $563M | 0.32% |
4,278,300
-1,399,400
| -25% | -$53.7M |
|
|
38
PUT
Advanced Micro Devices
AMD
$888B
| $562M | 0.31% |
4,653,300
-20,900
| -0.4% | -$3.01M |
|
39
PUT
TSMC
TSM
$2.2T
| $555M | 0.31% |
2,809,700
+87,900
| +3% | +$17M |
|
40
CALL
iShares Bitcoin Trust
IBIT
$48.9B
| $512M | 0.29% |
+9,659,500
| New | +$456M |
|
|
41
CALL
Netflix
NFLX
$286B
| $509M | 0.29% |
5,711,000
+831,000
| +17% | +$68.4M |
|
42
CALL
iShares Silver Trust
SLV
$28.4B
| $473M | 0.26% |
17,953,300
+2,377,500
| +15% | +$67.9M |
|
|
43
PUT
Palantir
PLTR
$318B
| $453M | 0.25% |
7,494,400
+1,216,800
| +19% | +$70.9M |
|
|
44
CALL
Boeing
BA
$161B
| $441M | 0.25% |
2,491,400
+855,700
| +52% | +$134M |
|
45
CALL
Costco
COST
$412B
| $439M | 0.25% |
479,400
+114,600
| +31% | +$106M |
|
46
CALL
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$46B
| $438M | 0.25% |
1,028,800
+295,400
| +40% | +$128M |
|
47
PUT
State Street SPDR NYSE Technology ETF
XNTK
$2.16B
| $436M | 0.24% |
6,232,300
-530,600
| -8% | -$108M |
|
|
48
PUT
Costco
COST
$412B
| $427M | 0.24% |
465,800
-7,100
| -2% | -$6.59M |
|
49
CALL
Berkshire Hathaway Class B
BRK.B
$1.06T
| $375M | 0.21% |
826,600
-38,900
| -4% | -$18M |
|
|
50
CALL
TSMC
TSM
$2.2T
| $374M | 0.21% |
1,895,500
+587,300
| +45% | +$114M |
|
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.