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 | |
|---|---|---|---|---|---|---|
5951
PUT
Cullinan Oncology
CGEM
$1.01B
| $46K | ﹤0.01% |
3,800
+400
| +12% | +$5.75K |
|
5952
ClearPoint Neuro
CLPT
$448M
| $46K | ﹤0.01% |
3,017
-7,926
| -72% | -$103K |
|
|
CVAC
5953
CALL
DELISTED
CureVac
CVAC
| $46K | ﹤0.01% |
13,600
+7,700
| +131% | +$22.2K |
|
5954
CALL
DocGo
DCGO
$64.3M
| $46K | ﹤0.01% |
10,900
+6,300
| +137% | +$24.3K |
|
5955
PUT
Essential Properties Realty Trust
EPRT
$6.77B
| $46K | ﹤0.01% |
1,500
-400
| -21% | -$13.1K |
|
5956
First Trust Natural Gas ETF
FCG
$647M
| $46K | ﹤0.01% |
1,906
+1,806
| +1,806% | +$44.6K |
|
5957
CALL
Funko
FNKO
$326M
| $46K | ﹤0.01% |
3,500
-1,400
| -29% | -$16.5K |
|
5958
PUT
Fulcrum Therapeutics
FULC
$273M
| $46K | ﹤0.01% |
9,900
-187,600
| -95% | -$692K |
|
5959
Harmonic Inc
HLIT
$1.25B
| $46K | ﹤0.01% |
3,481
-11,870
| -77% | -$155K |
|
|
ITOS
5960
DELISTED
iTeos Therapeutics
ITOS
| $46K | ﹤0.01% |
+6,070
| New | +$52.2K |
|
5961
PUT
MeiraGTx Holdings
MGTX
$1.09B
| $46K | ﹤0.01% |
7,600
-7,800
| -51% | -$45.7K |
|
5962
CALL
Madison Square Garden
MSGE
$3.65B
| $46K | ﹤0.01% |
1,300
-1,600
| -55% | -$61.8K |
|
|
NVNO
5963
PUT
enVVeno Medical
NVNO
$7.08M
| $46K | ﹤0.01% |
443
+409
| +1,203% | +$45.7K |
|
|
PBPB
5964
DELISTED
Potbelly
PBPB
| $46K | ﹤0.01% |
4,986
+4,761
| +2,116% | +$43.2K |
|
5965
CALL
Perimeter Solutions
PRM
$4.99B
| $46K | ﹤0.01% |
3,600
-34,400
| -91% | -$449K |
|
5966
Smith Micro Software
SMSI
$14.5M
| $46K | ﹤0.01% |
7,096
+6,660
| +1,528% | +$30.8K |
|
5967
E.W. Scripps
SSP
$257M
| $46K | ﹤0.01% |
21,075
+10,497
| +99% | +$24.2K |
|
5968
PUT
TransUnion
TRU
$15.1B
| $46K | ﹤0.01% |
500
-5,000
| -91% | -$506K |
|
|
VXRT
5969
DELISTED
Vaxart
VXRT
| $46K | ﹤0.01% |
70,357
+22,115
| +46% | +$15.4K |
|
5970
Worksport
WKSP
$9.71M
| $46K | ﹤0.01% |
5,103
+4,962
| +3,519% | +$35.1K |
|
5971
CALL
W.R. Berkley
WRB
$26.9B
| $46K | ﹤0.01% |
800
-27,150
| -97% | -$1.63M |
|
5972
PUT
Zevia
ZVIA
$122M
| $46K | ﹤0.01% |
11,200
+7,100
| +173% | +$14.5K |
|
5973
Bitwise Ethereum Strategy
AETH
$4.56M
| $45K | ﹤0.01% |
1,240
+1,172
| +1,724% | +$45.4K |
|
|
CVSA
5974
PUT
Covista Inc
CVSA
$4.25B
| $45K | ﹤0.01% |
500
-1,900
| -79% | -$159K |
|
5975
CALL
Commerce Bancshares
CBSH
$8.53B
| $45K | ﹤0.01% |
+772
| New | +$46.5K |
|
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.