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 | |
|---|---|---|---|---|---|---|
4176
Community Health Systems
CYH
$388M
| $271K | ﹤0.01% |
90,801
-29,112
| -24% | -$122K |
|
4177
CALL
Kennametal
KMT
$2.59B
| $271K | ﹤0.01% |
11,300
+8,500
| +304% | +$226K |
|
|
VRNT
4178
PUT
DELISTED
Verint Systems
VRNT
| $271K | ﹤0.01% |
9,900
+9,600
| +3,200% | +$240K |
|
4179
Universal Display
OLED
$3.76B
| $270K | ﹤0.01% |
1,852
-5,452
| -75% | -$971K |
|
4180
PUT
Aspen Aerogels
ASPN
$342M
| $269K | ﹤0.01% |
22,700
-42,600
| -65% | -$726K |
|
4181
CALL
ATI
ATI
$24.3B
| $269K | ﹤0.01% |
4,900
-38,900
| -89% | -$2.29M |
|
4182
Genpact
G
$6.25B
| $269K | ﹤0.01% |
+6,275
| New | +$265K |
|
4183
CALL
Piper Sandler
PIPR
$5.09B
| $269K | ﹤0.01% |
3,600
-4,400
| -55% | -$342K |
|
4184
CALL
ASE Group
ASX
$69.9B
| $268K | ﹤0.01% |
26,700
+19,900
| +293% | +$198K |
|
|
BRFS
4185
CALL
DELISTED
BRF SA
BRFS
| $268K | ﹤0.01% |
65,900
-52,300
| -44% | -$227K |
|
|
AGNT
4186
CALL
AGNT Inc
AGNT
$636M
| $268K | ﹤0.01% |
23,300
+3,600
| +18% | +$47.4K |
|
4187
PUT
Lightbridge
LTBR
$257M
| $268K | ﹤0.01% |
56,700
+54,100
| +2,081% | +$323K |
|
4188
PUT
Lufax Holding
LU
$1.33B
| $268K | ﹤0.01% |
342,000
-112,200
| -25% | -$310K |
|
4189
PUT
Quantum-Si Incorporated
QSI
$161M
| $268K | ﹤0.01% |
+99,600
| New | +$117K |
|
4190
PUT
ChargePoint
CHPT
$136M
| $267K | ﹤0.01% |
12,480
-12,155
| -49% | -$301K |
|
4191
Deutsche Bank
DB
$68B
| $267K | ﹤0.01% |
+15,713
| New | +$270K |
|
4192
PUT
Janux Therapeutics
JANX
$898M
| $267K | ﹤0.01% |
5,000
+3,000
| +150% | +$159K |
|
4193
PUT
Ouster
OUST
$2.12B
| $267K | ﹤0.01% |
21,900
-49,100
| -69% | -$432K |
|
4194
PUT
Ameriprise Financial
AMP
$48.2B
| $266K | ﹤0.01% |
500
-2,400
| -83% | -$1.28M |
|
4195
CALL
Ardmore Shipping
ASC
$678M
| $266K | ﹤0.01% |
21,900
-10,800
| -33% | -$147K |
|
|
BASE
4196
CALL
DELISTED
Couchbase
BASE
| $266K | ﹤0.01% |
17,100
+2,900
| +20% | +$49.5K |
|
4197
CALL
Chefs' Warehouse
CHEF
$4.53B
| $266K | ﹤0.01% |
5,400
-2,700
| -33% | -$118K |
|
4198
Teucrium Corn Fund
CORN
$179M
| $266K | ﹤0.01% |
14,212
+4,688
| +49% | +$85.1K |
|
4199
PUT
Helix Energy Solutions
HLX
$1.33B
| $266K | ﹤0.01% |
28,600
+12,600
| +79% | +$127K |
|
4200
PUT
InfuSystem Holdings
INFU
$198M
| $266K | ﹤0.01% |
+31,500
| New | +$248K |
|
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.