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 | |
|---|---|---|---|---|---|---|
4451
CALL
LifeMD
LFMD
$182M
| $211K | ﹤0.01% |
42,700
-2,800
| -6% | -$14.7K |
|
4452
NCR Atleos
NATL
$3.53B
| $211K | ﹤0.01% |
6,241
-3,038
| -33% | -$92.1K |
|
4453
Protagonist Therapeutics
PTGX
$8.71B
| $211K | ﹤0.01% |
+5,487
| New | +$239K |
|
4454
CALL
SIGA Technologies
SIGA
$244M
| $211K | ﹤0.01% |
35,200
-15,000
| -30% | -$100K |
|
4455
Vera Therapeutics
VERA
$2.39B
| $211K | ﹤0.01% |
+5,011
| New | +$222K |
|
|
EU
4456
CALL
enCore Energy
EU
$214M
| $210K | ﹤0.01% |
61,600
+58,600
| +1,953% | +$221K |
|
4457
CALL
Kimco Realty
KIM
$17.6B
| $210K | ﹤0.01% |
9,000
-18,000
| -67% | -$436K |
|
4458
PUT
Main Street Capital
MAIN
$5.12B
| $210K | ﹤0.01% |
3,600
+400
| +13% | +$21.3K |
|
4459
CALL
Natural Resource Partners
NRP
$1.31B
| $210K | ﹤0.01% |
1,900
-35,800
| -95% | -$3.69M |
|
4460
CALL
Woodside Energy
WDS
$44.4B
| $210K | ﹤0.01% |
13,500
-200
| -1% | -$3.21K |
|
4461
CALL
Driven Brands
DRVN
$2.49B
| $209K | ﹤0.01% |
13,000
-9,600
| -42% | -$151K |
|
4462
CALL
Kulicke & Soffa
KLIC
$4.48B
| $209K | ﹤0.01% |
4,500
+1,000
| +29% | +$46.9K |
|
4463
PUT
Enviri
NVRI
$642M
| $209K | ﹤0.01% |
27,200
-29,400
| -52% | -$245K |
|
4464
CALL
Pacira BioSciences
PCRX
$1.04B
| $209K | ﹤0.01% |
11,100
-2,700
| -20% | -$47.4K |
|
4465
CALL
Power Integrations
POWI
$3.26B
| $209K | ﹤0.01% |
3,400
-7,800
| -70% | -$496K |
|
4466
CALL
Columbus McKinnon
CMCO
$437M
| $208K | ﹤0.01% |
+5,600
| New | +$203K |
|
|
GOOS
4467
PUT
Canada Goose Holdings
GOOS
$916M
| $208K | ﹤0.01% |
20,800
-23,900
| -53% | -$244K |
|
|
LADR
4468
PUT
Ladder Capital
LADR
$1.24B
| $208K | ﹤0.01% |
18,600
-2,500
| -12% | -$28.7K |
|
4469
CALL
Neogen
NEOG
$2.06B
| $208K | ﹤0.01% |
17,200
-300
| -2% | -$4.2K |
|
4470
PTC
PTC
$15B
| $208K | ﹤0.01% |
1,135
-606
| -35% | -$115K |
|
4471
CALL
Red Rock Resorts
RRR
$3.86B
| $208K | ﹤0.01% |
4,500
-4,600
| -51% | -$234K |
|
4472
PUT
Clean Harbors
CLH
$17.5B
| $207K | ﹤0.01% |
900
-34,400
| -97% | -$8.55M |
|
4473
Global Net Lease
GNL
$1.87B
| $207K | ﹤0.01% |
28,361
+20,265
| +250% | +$156K |
|
|
INFA
4474
CALL
DELISTED
Informatica
INFA
| $207K | ﹤0.01% |
8,000
-2,100
| -21% | -$55K |
|
4475
Janus International
JBI
$716M
| $207K | ﹤0.01% |
+28,212
| New | +$233K |
|
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.