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 | |
|---|---|---|---|---|---|---|
1676
PUT
Praxis Precision Medicines
PRAX
$9.07B
| $3.79M | ﹤0.01% |
49,300
+33,300
| +208% | +$2.41M |
|
1677
PUT
Consolidated Edison
ED
$41.6B
| $3.79M | ﹤0.01% |
42,500
-16,700
| -28% | -$1.64M |
|
1678
FedEx
FDX
$74.5B
| $3.79M | ﹤0.01% |
13,480
-14,063
| -51% | -$3.93M |
|
1679
PUT
Robert Half
RHI
$3.61B
| $3.78M | ﹤0.01% |
53,600
-20,100
| -27% | -$1.43M |
|
1680
CALL
NextNav
NN
$1.7B
| $3.77M | ﹤0.01% |
242,100
+166,500
| +220% | +$2.22M |
|
1681
PUT
Sable Offshore Corp
SOC
$903M
| $3.77M | ﹤0.01% |
164,500
+129,000
| +363% | +$2.82M |
|
|
GTM
1682
CALL
ZoomInfo Technologies
GTM
$861M
| $3.77M | ﹤0.01% |
358,400
-133,600
| -27% | -$1.43M |
|
1683
CALL
AngloGold Ashanti
AU
$40.3B
| $3.76M | ﹤0.01% |
163,000
+63,700
| +64% | +$1.66M |
|
1684
CALL
Tencent Music
TME
$14.5B
| $3.76M | ﹤0.01% |
331,200
+900
| +0.3% | +$10.7K |
|
1685
PUT
Haemonetics
HAE
$3.58B
| $3.75M | ﹤0.01% |
48,100
+47,900
| +23,950% | +$3.85M |
|
1686
PUT
Plug Power
PLUG
$2.92B
| $3.75M | ﹤0.01% |
1,762,900
+41,300
| +2% | +$90.1K |
|
|
CFLT
1687
PUT
DELISTED
Confluent
CFLT
| $3.75M | ﹤0.01% |
134,200
-116,800
| -47% | -$3.13M |
|
1688
Alcoa
AA
$11.7B
| $3.75M | ﹤0.01% |
99,216
+9,039
| +10% | +$376K |
|
1689
CALL
Dave & Buster's
PLAY
$343M
| $3.75M | ﹤0.01% |
128,300
-2,900
| -2% | -$101K |
|
1690
CALL
Fidelity Wise Origin Bitcoin Fund
FBTC
$11.9B
| $3.74M | ﹤0.01% |
+45,900
| New | +$3.33M |
|
1691
PUT
Kornit Digital
KRNT
$706M
| $3.74M | ﹤0.01% |
121,000
-17,500
| -13% | -$502K |
|
|
RNAM
1692
CALL
DELISTED
Avidity Biosciences
RNAM
| $3.73M | ﹤0.01% |
128,400
+126,500
| +6,658% | +$5.29M |
|
1693
PUT
Matador Resources
MTDR
$6.31B
| $3.73M | ﹤0.01% |
66,300
-6,400
| -9% | -$352K |
|
1694
CALL
ResMed
RMD
$28.3B
| $3.73M | ﹤0.01% |
16,300
-36,900
| -69% | -$8.88M |
|
1695
CALL
Scotiabank
BNS
$106B
| $3.72M | ﹤0.01% |
69,300
-58,400
| -46% | -$3.15M |
|
1696
PUT
LPL Financial
LPLA
$26.3B
| $3.72M | ﹤0.01% |
11,400
-20,100
| -64% | -$5.94M |
|
1697
PUT
Agilent Technologies
A
$39.1B
| $3.72M | ﹤0.01% |
27,700
-16,700
| -38% | -$2.29M |
|
1698
State Street SPDR S&P Bank ETF
KBE
$1.64B
| $3.71M | ﹤0.01% |
+66,990
| New | +$3.82M |
|
|
1699
PUT
Fidelity Wise Origin Bitcoin Fund
FBTC
$11.9B
| $3.71M | ﹤0.01% |
+45,500
| New | +$3.3M |
|
1700
CALL
Dropbox
DBX
$6.81B
| $3.7M | ﹤0.01% |
123,200
-127,500
| -51% | -$3.52M |
|
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.