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 | |
|---|---|---|---|---|---|---|
5276
Companhia Siderúrgica Nacional
SID
$1.31B
| $90K | ﹤0.01% |
+62,809
| New | +$123K |
|
5277
PUT
10x Genomics
TXG
$6B
| $90K | ﹤0.01% |
6,300
+2,300
| +58% | +$36.3K |
|
5278
Amer Sports
AS
$20.7B
| $90K | ﹤0.01% |
3,248
+1,118
| +52% | +$24.6K |
|
|
ARDT
5279
CALL
Ardent Health
ARDT
$1.53B
| $90K | ﹤0.01% |
5,300
+4,400
| +489% | +$76.3K |
|
5280
Carter Bankshares
CARE
$766M
| $89K | ﹤0.01% |
5,062
-1,430
| -22% | -$26.3K |
|
5281
PUT
Columbia Banking Systems
COLB
$8.84B
| $89K | ﹤0.01% |
3,300
-1,700
| -34% | -$48.8K |
|
|
CRON
5282
Cronos Group
CRON
$1.06B
| $89K | ﹤0.01% |
44,126
-25,604
| -37% | -$53.4K |
|
5283
CALL
Ethan Allen Interiors
ETD
$570M
| $89K | ﹤0.01% |
3,200
-2,200
| -41% | -$65.3K |
|
5284
Gladstone Investment Corp
GAIN
$643M
| $89K | ﹤0.01% |
6,759
+6,312
| +1,412% | +$86.2K |
|
|
ORLA
5285
Orla Mining
ORLA
$3.54B
| $89K | ﹤0.01% |
16,145
+8,991
| +126% | +$43.4K |
|
5286
Patria Investments
PAX
$1.75B
| $89K | ﹤0.01% |
7,666
+765
| +11% | +$9.04K |
|
|
CNH
5287
PUT
CNH Industrial
CNH
$12.7B
| $89K | ﹤0.01% |
7,900
-96,600
| -92% | -$1.1M |
|
5288
PUT
Invesco DB Base Metals Fund
DBB
$312M
| $88K | ﹤0.01% |
3,800
-1,400
| -27% | -$28.4K |
|
5289
CALL
Lexicon Pharmaceuticals
LXRX
$1.03B
| $88K | ﹤0.01% |
120,300
-47,900
| -28% | -$57.7K |
|
5290
PUT
LHA Market State Tactical Beta ETF
MSTB
$194M
| $88K | ﹤0.01% |
7,700
+1,100
| +17% | +$37.9K |
|
5291
PUT
Magnachip Semiconductor
MX
$119M
| $88K | ﹤0.01% |
21,900
+6,700
| +44% | +$28.5K |
|
5292
PUT
Natural Resource Partners
NRP
$1.3B
| $88K | ﹤0.01% |
800
-6,500
| -89% | -$669K |
|
5293
PUT
Navitas Semiconductor
NVTS
$2.84B
| $88K | ﹤0.01% |
24,900
-41,000
| -62% | -$114K |
|
5294
CALL
Oaktree Specialty Lending
OCSL
$1.02B
| $88K | ﹤0.01% |
5,800
-7,000
| -55% | -$112K |
|
|
SJT
5295
San Juan Basin Royalty Trust
SJT
$117M
| $88K | ﹤0.01% |
+23,194
| New | +$92.8K |
|
|
SRG
5296
PUT
Seritage Growth Properties
SRG
$136M
| $88K | ﹤0.01% |
21,500
-500
| -2% | -$2.15K |
|
|
ENLC
5297
DELISTED
ENLINK MIDSTREAM, LLC
ENLC
| $88K | ﹤0.01% |
6,260
-1,926
| -24% | -$28.7K |
|
5298
Aaon
AAON
$7.3B
| $87K | ﹤0.01% |
746
-1,508
| -67% | -$185K |
|
5299
PUT
Arcosa
ACA
$7.13B
| $87K | ﹤0.01% |
900
+400
| +80% | +$40.2K |
|
5300
CALL
Banco Bilbao Vizcaya Argentaria
BBVA
$154B
| $87K | ﹤0.01% |
9,000
+8,900
| +8,900% | +$88K |
|
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.