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 |
NVIDIA
NVDA
|
+$93M |
| 2 |
Citigroup
C
|
+$74.8M |
| 3 |
Pinduoduo
PDD
|
+$50.7M |
| 4 |
Intel
INTC
|
+$47.1M |
| 5 |
Broadcom
AVGO
|
+$46.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$94.5M |
| 2 |
Pfizer
PFE
|
+$66.4M |
| 3 |
Boeing
BA
|
+$61.6M |
| 4 |
PayPal
PYPL
|
+$42.2M |
| 5 |
GE Aerospace
GE
|
+$42M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.53% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.21% |
| 4 | Financials | 0.2% |
| 5 | Materials | 0.12% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
AD
5376
CALL
Array Digital Infrastructure
AD
$3B
| $100K | ﹤0.01% |
1,800
-167,100
| -99% | -$7.36M |
|
|
VNET
5377
VNET Group
VNET
$2.02B
| $100K | ﹤0.01% |
47,850
-27,994
| -37% | -$53.6K |
|
5378
PUT
WaFd
WAFD
$2.7B
| $100K | ﹤0.01% |
3,500
+2,900
| +483% | +$80.3K |
|
5379
Xenon Pharmaceuticals
XENE
$6.07B
| $100K | ﹤0.01% |
2,589
-1,388
| -35% | -$55.5K |
|
5380
PUT
Akebia Therapeutics
AKBA
$351M
| $99K | ﹤0.01% |
97,400
-72,800
| -43% | -$90K |
|
5381
PUT
Artisan Partners
APAM
$2.79B
| $99K | ﹤0.01% |
2,400
+100
| +4% | +$4.32K |
|
5382
CALL
Corbus Pharmaceuticals
CRBP
$162M
| $99K | ﹤0.01% |
2,200
+1,600
| +267% | +$67.3K |
|
5383
Freedom Holding
FRHC
$9.8B
| $99K | ﹤0.01% |
1,323
-3,280
| -71% | -$238K |
|
5384
CALL
Granite Construction
GVA
$5.25B
| $99K | ﹤0.01% |
1,600
| – | – |
|
5385
CALL
Independence Realty Trust
IRT
$3.92B
| $99K | ﹤0.01% |
5,300
+1,800
| +51% | +$30.1K |
|
5386
JetBlue
JBLU
$2.29B
| $99K | ﹤0.01% |
+16,411
| New | +$98.9K |
|
5387
PUT
Lincoln Educational Services
LINC
$1.33B
| $99K | ﹤0.01% |
+8,400
| New | +$91.6K |
|
5388
CALL
MiMedx Group
MDXG
$595M
| $99K | ﹤0.01% |
14,400
+10,200
| +243% | +$71.7K |
|
5389
CALL
Medallion Financial
MFIN
$231M
| $99K | ﹤0.01% |
13,000
-12,900
| -50% | -$102K |
|
5390
Magnite
MGNI
$2.71B
| $99K | ﹤0.01% |
+7,524
| New | +$82.2K |
|
5391
PDS Biotechnology
PDSB
$38.4M
| $99K | ﹤0.01% |
33,841
+12,188
| +56% | +$39K |
|
5392
PRA Group
PRAA
$653M
| $99K | ﹤0.01% |
+5,081
| New | +$117K |
|
5393
Teucrium Soybean Fund
SOYB
$61.1M
| $99K | ﹤0.01% |
+4,189
| New | +$105K |
|
5394
Teradata
TDC
$2.88B
| $99K | ﹤0.01% |
+2,872
| New | +$100K |
|
|
AIFU
5395
PUT
AIFU Inc
AIFU
$201M
| $99K | ﹤0.01% |
+125
| New | +$168K |
|
|
VZIO
5396
PUT
DELISTED
VIZIO Holding Corp.
VZIO
| $99K | ﹤0.01% |
9,200
-29,500
| -76% | -$315K |
|
5397
Black Diamond Therapeutics
BDTX
$94.5M
| $98K | ﹤0.01% |
21,034
+13,542
| +181% | +$72.7K |
|
5398
PUT
Dyne Therapeutics
DYN
$4.66B
| $98K | ﹤0.01% |
2,800
-119,300
| -98% | -$3.47M |
|
|
ESGR
5399
DELISTED
Enstar Group
ESGR
| $98K | ﹤0.01% |
+321
| New | +$96.3K |
|
5400
CALL
First Watch Restaurant Group
FWRG
$803M
| $98K | ﹤0.01% |
5,600
-900
| -14% | -$18.8K |
|
Similar funds
Simplex Trading's Q2 2024 Portfolio in Review
As of Q2 2024, Simplex Trading held 10,213 positions worth $162B, down 6.5% from $173B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading withdrew a net $19.2B in Q2 2024, closing 1,431 positions and reducing 4,061 holdings. Its most notable exit was Boeing, an estimated $61.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.53% of assets, up from 0.38% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in Citigroup worth $77M.
- Simplex Trading's largest Q2 2024 buy was Citigroup: 1,213,247 shares worth $77M.
- Simplex Trading added most to NVIDIA in Q2 2024, an estimated $93M increase.
- Simplex Trading's biggest Q2 2024 reduction was State Street Energy Select Sector SPDR ETF, cutting an estimated $94.5M.
- Simplex Trading fully exited Boeing in Q2 2024, selling an estimated $61.6M.
- Simplex Trading's ten largest holdings make up 50% of its $162B portfolio in Q2 2024.
- Simplex Trading opened 1,358 new positions and closed 1,431 in Q2 2024.
- Simplex Trading's portfolio value fell 6.5% quarter-over-quarter to $162B.
Based on Simplex Trading's 13F filing for Q2 2024, filed 25 Jul 2024.