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 | |
|---|---|---|---|---|---|---|
|
OLPX
6151
PUT
DELISTED
Olaplex Holdings
OLPX
| $38K | ﹤0.01% |
22,400
+21,400
| +2,140% | +$42.6K |
|
6152
PUT
Fidelity Nasdaq Composite Index ETF
ONEQ
$10.4B
| $38K | ﹤0.01% |
+500
| New | +$37.4K |
|
6153
CALL
Quanterix
QTRX
$164M
| $38K | ﹤0.01% |
3,600
-2,500
| -41% | -$30.4K |
|
6154
Reynolds Consumer Products
REYN
$5.26B
| $38K | ﹤0.01% |
+1,438
| New | +$40.8K |
|
|
FIRY
6155
Firy Inc
FIRY
$148M
| $38K | ﹤0.01% |
7,563
+6,941
| +1,116% | +$37K |
|
6156
Tanger
SKT
$4.67B
| $38K | ﹤0.01% |
+1,142
| New | +$39.8K |
|
6157
PUT
Universal Corp
UVV
$1.31B
| $38K | ﹤0.01% |
700
+200
| +40% | +$10.7K |
|
6158
CALL
Addus HomeCare
ADUS
$2.16B
| $37K | ﹤0.01% |
+300
| New | +$37.9K |
|
6159
Arcturus Therapeutics
ARCT
$164M
| $37K | ﹤0.01% |
2,187
+806
| +58% | +$15.2K |
|
6160
Ashland
ASH
$3.33B
| $37K | ﹤0.01% |
+528
| New | +$42.3K |
|
6161
PUT
Atlas Lithium Corp
ATLX
$80.8M
| $37K | ﹤0.01% |
6,000
-100
| -2% | -$762 |
|
6162
VanEck Biotech ETF
BBH
$400M
| $37K | ﹤0.01% |
+236
| New | +$39.7K |
|
6163
Bio-Rad Laboratories Class A
BIO
$8.71B
| $37K | ﹤0.01% |
114
+79
| +226% | +$26.8K |
|
6164
CALL
Clearfield
CLFD
$411M
| $37K | ﹤0.01% |
1,200
-24,500
| -95% | -$823K |
|
|
FRSX
6165
Foresight Autonomous Holdings
FRSX
$3.9M
| $37K | ﹤0.01% |
+1,201
| New | +$19.6K |
|
|
GAU
6166
CALL
Galiano Gold
GAU
$455M
| $37K | ﹤0.01% |
30,300
+13,300
| +78% | +$19.2K |
|
6167
PUT
Korea Electric Power
KEP
$15.3B
| $37K | ﹤0.01% |
5,500
+4,000
| +267% | +$31.3K |
|
6168
CALL
Karyopharm Therapeutics
KPTI
$43.5M
| $37K | ﹤0.01% |
3,667
-6,813
| -65% | -$82.4K |
|
|
LADR
6169
Ladder Capital
LADR
$1.21B
| $37K | ﹤0.01% |
+3,379
| New | +$38.8K |
|
6170
CALL
MDU Resources
MDU
$4.17B
| $37K | ﹤0.01% |
3,800
-14,070
| -79% | -$247K |
|
|
ONT
6171
CALL
Onterris Inc
ONT
$759M
| $37K | ﹤0.01% |
+2,000
| New | +$42.1K |
|
6172
PUT
ODDITY Tech
ODD
$654M
| $37K | ﹤0.01% |
900
-11,000
| -92% | -$473K |
|
|
OTLY
6173
PUT
Oatly Group
OTLY
$465M
| $37K | ﹤0.01% |
2,800
-190
| -6% | -$2.8K |
|
6174
Ring Energy
REI
$315M
| $37K | ﹤0.01% |
27,492
-41,543
| -60% | -$62.4K |
|
6175
Satellogic
SATL
$531M
| $37K | ﹤0.01% |
13,119
+13,049
| +18,641% | +$23.8K |
|
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.