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 | |
|---|---|---|---|---|---|---|
7151
PUT
ADC Therapeutics
ADCT
$141M
| $14K | ﹤0.01% |
4,500
+1,900
| +73% | +$7.55K |
|
|
AEVA
7152
PUT
Aeva Technologies
AEVA
$1B
| $14K | ﹤0.01% |
5,700
+500
| +10% | +$1.63K |
|
|
AGS
7153
CALL
DELISTED
PlayAGS
AGS
| $14K | ﹤0.01% |
1,300
+600
| +86% | +$6.2K |
|
7154
CALL
American Homes 4 Rent
AMH
$12.2B
| $14K | ﹤0.01% |
400
-4,500
| -92% | -$162K |
|
7155
PUT
Andersons Inc
ANDE
$2.49B
| $14K | ﹤0.01% |
300
-2,300
| -88% | -$123K |
|
7156
PUT
American Outdoor Brands
AOUT
$159M
| $14K | ﹤0.01% |
1,600
+700
| +78% | +$5.82K |
|
7157
CALL
Arbe Robotics
ARBE
$79.4M
| $14K | ﹤0.01% |
7,700
+4,000
| +108% | +$7.37K |
|
7158
PUT
Arena Group
AREN
$50.9M
| $14K | ﹤0.01% |
18,500
+4,500
| +32% | +$3.63K |
|
7159
PUT
Actinium Pharmaceuticals
ATNM
$27.2M
| $14K | ﹤0.01% |
1,900
-12,700
| -87% | -$105K |
|
|
BRY
7160
PUT
DELISTED
Berry Corp
BRY
| $14K | ﹤0.01% |
2,300
-2,200
| -49% | -$16.4K |
|
7161
CALL
Broadwind
BWEN
$92.9M
| $14K | ﹤0.01% |
+4,400
| New | +$13.1K |
|
7162
CALL
Community Bank
CBU
$3.4B
| $14K | ﹤0.01% |
+300
| New | +$13.6K |
|
7163
CALL
CBIZ
CBZ
$2.51B
| $14K | ﹤0.01% |
200
-28,200
| -99% | -$2.13M |
|
7164
Caribou Biosciences
CRBU
$148M
| $14K | ﹤0.01% |
8,613
-10,599
| -55% | -$33.9K |
|
7165
CALL
Caesarstone
CSTE
$71.6M
| $14K | ﹤0.01% |
+2,800
| New | +$15.9K |
|
|
CUK
7166
DELISTED
Carnival PLC
CUK
| $14K | ﹤0.01% |
+827
| New | +$11.6K |
|
7167
Torrid Holdings
CURV
$271M
| $14K | ﹤0.01% |
+1,997
| New | +$11.4K |
|
|
CVAC
7168
DELISTED
CureVac
CVAC
| $14K | ﹤0.01% |
4,391
+2,398
| +120% | +$7.84K |
|
7169
CALL
California Water Service
CWT
$3.14B
| $14K | ﹤0.01% |
300
+200
| +200% | +$9.72K |
|
7170
CryoPort
CYRX
$765M
| $14K | ﹤0.01% |
2,090
-13,272
| -86% | -$179K |
|
7171
CALL
Diodes
DIOD
$3.69B
| $14K | ﹤0.01% |
200
-4,200
| -95% | -$301K |
|
7172
iShares MSCI China Small-Cap ETF
ECNS
$63.9M
| $14K | ﹤0.01% |
600
-15,879
| -96% | -$396K |
|
7173
eHealth
EHTH
$43.2M
| $14K | ﹤0.01% |
3,234
-14
| -0.4% | -$70 |
|
|
EWCZ
7174
PUT
DELISTED
European Wax Center
EWCZ
| $14K | ﹤0.01% |
+1,500
| New | +$17K |
|
7175
CALL
Full House Resorts
FLL
$83.8M
| $14K | ﹤0.01% |
2,800
-2,400
| -46% | -$12.2K |
|
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.