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 | |
|---|---|---|---|---|---|---|
7001
MeiraGTx Holdings
MGTX
$1.08B
| $13K | ﹤0.01% |
2,248
-3,493
| -61% | -$20.5K |
|
7002
CALL
Everspin Technologies
MRAM
$303M
| $13K | ﹤0.01% |
+2,100
| New | +$13K |
|
7003
Mettler-Toledo International
MTD
$28.1B
| $13K | ﹤0.01% |
+11
| New | +$14.4K |
|
7004
Newegg Commerce
NEGG
$273M
| $13K | ﹤0.01% |
1,686
-706
| -30% | -$8.5K |
|
7005
PUT
Global X MSCI Norway ETF
NORW
$86.1M
| $13K | ﹤0.01% |
400
| – | – |
|
7006
CALL
Nerdy
NRDY
$108M
| $13K | ﹤0.01% |
8,300
+5,700
| +219% | +$7.07K |
|
|
ORLA
7007
PUT
Orla Mining
ORLA
$3.36B
| $13K | ﹤0.01% |
+2,400
| New | +$11.6K |
|
7008
PUT
Par Pacific Holdings
PARR
$4.17B
| $13K | ﹤0.01% |
800
-1,400
| -64% | -$23.6K |
|
7009
Invesco Global Clean Energy ETF
PBD
$176M
| $13K | ﹤0.01% |
+1,200
| New | +$15K |
|
7010
PDS Biotechnology
PDSB
$37.4M
| $13K | ﹤0.01% |
8,267
+1,570
| +23% | +$4.16K |
|
7011
PetMed Express
PETS
$42.3M
| $13K | ﹤0.01% |
2,713
-6,674
| -71% | -$31.3K |
|
|
PPSI
7012
PUT
Pioneer Power Solutions
PPSI
$30.8M
| $13K | ﹤0.01% |
+3,200
| New | +$18.1K |
|
|
RPC
7013
PUT
Ridgepost Capital
RPC
$926M
| $13K | ﹤0.01% |
+1,100
| New | +$13.4K |
|
7014
CALL
Ribbon Communications
RBBN
$386M
| $13K | ﹤0.01% |
3,200
+2,000
| +167% | +$7.55K |
|
7015
Arcus Biosciences
RCUS
$3.33B
| $13K | ﹤0.01% |
927
-9,813
| -91% | -$160K |
|
7016
CALL
Reynolds Consumer Products
REYN
$5.42B
| $13K | ﹤0.01% |
500
| – | – |
|
7017
Schwab 1000 Index ETF
SCHK
$5.59B
| $13K | ﹤0.01% |
477
+409
| +601% | +$11.6K |
|
7018
Schwab US Mid-Cap ETF
SCHM
$14.2B
| $13K | ﹤0.01% |
+470
| New | +$13.4K |
|
7019
PUT
Sotera Health
SHC
$5B
| $13K | ﹤0.01% |
1,000
-4,900
| -83% | -$71K |
|
|
SNCY
7020
CALL
DELISTED
Sun Country Airlines
SNCY
| $13K | ﹤0.01% |
+900
| New | +$12.2K |
|
7021
PUT
Sportradar
SRAD
$4.42B
| $13K | ﹤0.01% |
800
-10,900
| -93% | -$165K |
|
7022
CALL
Sasol
SSL
$7.4B
| $13K | ﹤0.01% |
+2,900
| New | +$16.4K |
|
7023
Suzano
SUZ
$10.2B
| $13K | ﹤0.01% |
1,358
-4,335
| -76% | -$44.4K |
|
7024
TFI International
TFII
$11.6B
| $13K | ﹤0.01% |
+97
| New | +$13.8K |
|
7025
Interface
TILE
$1.95B
| $13K | ﹤0.01% |
557
+355
| +176% | +$8.16K |
|
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.