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 | |
|---|---|---|---|---|---|---|
5826
PUT
Church & Dwight Co
CHD
$23.4B
| $52K | ﹤0.01% |
500
-16,000
| -97% | -$1.69M |
|
5827
CALL
Chemed
CHE
$7.07B
| $52K | ﹤0.01% |
+100
| New | +$56.4K |
|
|
GPGI
5828
PUT
GPGI Inc
GPGI
$3.83B
| $52K | ﹤0.01% |
4,094
-106,313
| -96% | -$1.35M |
|
5829
Encompass Health
EHC
$11B
| $52K | ﹤0.01% |
+569
| New | +$55.9K |
|
5830
Electromed
ELMD
$337M
| $52K | ﹤0.01% |
+1,775
| New | +$46.4K |
|
5831
PUT
Enovis
ENOV
$1.68B
| $52K | ﹤0.01% |
1,200
-47,400
| -98% | -$2.08M |
|
5832
First Financial Bankshares
FFIN
$5.04B
| $52K | ﹤0.01% |
1,446
-12,084
| -89% | -$469K |
|
5833
Gilat Satellite Networks
GILT
$834M
| $52K | ﹤0.01% |
8,469
+4,629
| +121% | +$25.2K |
|
5834
PUT
Intrepid Potash
IPI
$456M
| $52K | ﹤0.01% |
2,400
-10,400
| -81% | -$262K |
|
5835
Life Time Group Holdings
LTH
$10.1B
| $52K | ﹤0.01% |
+2,387
| New | +$57.1K |
|
|
PSTL
5836
PUT
Postal Realty Trust
PSTL
$694M
| $52K | ﹤0.01% |
4,000
+2,300
| +135% | +$32.3K |
|
5837
PUT
Rayonier
RYN
$6.55B
| $52K | ﹤0.01% |
2,098
+224
| +12% | +$6.24K |
|
5838
T-Rex 2X Inverse Tesla Daily Target ETF
TSLZ
$48.3M
| $52K | ﹤0.01% |
+1,058
| New | +$142K |
|
|
WIMI
5839
PUT
WiMi Hologram Cloud
WIMI
$22.1M
| $52K | ﹤0.01% |
+2,840
| New | +$27.2K |
|
5840
Zebra Technologies
ZBRA
$14B
| $52K | ﹤0.01% |
+136
| New | +$52.7K |
|
|
NFLU
5841
T-Rex 2X Long NFLX Daily Target ETF
NFLU
$54.1M
| $52K | ﹤0.01% |
+1,407
| New | +$45.9K |
|
|
NPKI
5842
CALL
NPK International
NPKI
$1.06B
| $52K | ﹤0.01% |
6,800
+1,500
| +28% | +$11K |
|
5843
CALL
ACI Worldwide
ACIW
$5.83B
| $51K | ﹤0.01% |
1,000
+900
| +900% | +$47.9K |
|
5844
CALL
Atlas Lithium Corp
ATLX
$80.8M
| $51K | ﹤0.01% |
8,100
-2,700
| -25% | -$20.6K |
|
5845
PUT
Bally's
BALY
$682M
| $51K | ﹤0.01% |
2,900
-1,300
| -31% | -$22.9K |
|
5846
PUT
Sprinklr
CXM
$1.49B
| $51K | ﹤0.01% |
6,100
+5,200
| +578% | +$41.6K |
|
5847
PUT
Dorman Products
DORM
$3.98B
| $51K | ﹤0.01% |
400
| – | – |
|
5848
CALL
Intapp
INTA
$2.52B
| $51K | ﹤0.01% |
800
-2,200
| -73% | -$126K |
|
|
NXDR
5849
CALL
Nextdoor Holdings
NXDR
$847M
| $51K | ﹤0.01% |
21,900
+14,500
| +196% | +$36K |
|
5850
PUT
Live Oak Bancshares
LOB
$1.98B
| $51K | ﹤0.01% |
1,300
-900
| -41% | -$40.5K |
|
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.