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 | |
|---|---|---|---|---|---|---|
5251
CALL
Stem
STEM
$47.5M
| $114K | ﹤0.01% |
5,180
+130
| +3% | +$3.81K |
|
5252
Sixth Street Specialty
TSLX
$1.64B
| $114K | ﹤0.01% |
5,379
-1,219
| -18% | -$26K |
|
5253
UWM Holdings
UWMC
$631M
| $114K | ﹤0.01% |
+16,471
| New | +$113K |
|
|
BMTX
5254
PUT
DELISTED
BM Technologies, Inc.
BMTX
| $114K | ﹤0.01% |
+51,000
| New | +$116K |
|
5255
CALL
Barings BDC
BBDC
$865M
| $113K | ﹤0.01% |
11,700
+8,400
| +255% | +$80.5K |
|
5256
PUT
Cooper Companies
COO
$14.2B
| $113K | ﹤0.01% |
1,300
-2,000
| -61% | -$187K |
|
5257
FuelCell Energy
FCEL
$1.89B
| $113K | ﹤0.01% |
+5,921
| New | +$159K |
|
5258
PUT
Mativ Holdings
MATV
$472M
| $113K | ﹤0.01% |
6,700
+4,400
| +191% | +$78.4K |
|
5259
Sonoco
SON
$5.62B
| $113K | ﹤0.01% |
2,229
+2,083
| +1,427% | +$120K |
|
5260
Simpson Manufacturing
SSD
$7.68B
| $113K | ﹤0.01% |
673
+585
| +665% | +$102K |
|
|
SUM
5261
PUT
DELISTED
Summit Materials, Inc. Class A Common Stock
SUM
| $113K | ﹤0.01% |
3,100
-49,500
| -94% | -$1.94M |
|
5262
CALL
Genpact
G
$5.99B
| $112K | ﹤0.01% |
3,500
-5,700
| -62% | -$184K |
|
5263
CALL
HealthEquity
HQY
$8.44B
| $112K | ﹤0.01% |
1,300
-25,700
| -95% | -$2.08M |
|
5264
CALL
Hexcel
HXL
$7.78B
| $112K | ﹤0.01% |
1,800
+1,500
| +500% | +$101K |
|
5265
Medallion Financial
MFIN
$233M
| $112K | ﹤0.01% |
+14,627
| New | +$116K |
|
5266
PUT
Patria Investments
PAX
$1.77B
| $112K | ﹤0.01% |
9,300
+7,600
| +447% | +$100K |
|
|
EXAI
5267
PUT
DELISTED
Exscientia Plc American Depositary Shares
EXAI
| $112K | ﹤0.01% |
22,000
+5,600
| +34% | +$27.6K |
|
|
LILM
5268
CALL
DELISTED
Lilium N.V. Class A Ordinary Shares
LILM
| $112K | ﹤0.01% |
141,500
+38,000
| +37% | +$35.6K |
|
5269
AXT Inc
AXTI
$3.07B
| $111K | ﹤0.01% |
32,882
+1,544
| +5% | +$5.4K |
|
5270
PUT
Biomea Fusion
BMEA
$88.2M
| $111K | ﹤0.01% |
24,700
-15,200
| -38% | -$154K |
|
5271
Global X Cybersecurity ETF
BUG
$1.26B
| $111K | ﹤0.01% |
3,773
-3,953
| -51% | -$113K |
|
5272
Diageo
DEO
$49.5B
| $111K | ﹤0.01% |
+882
| New | +$122K |
|
5273
PUT
Embecta
EMBC
$217M
| $111K | ﹤0.01% |
8,900
+6,700
| +305% | +$81.3K |
|
5274
PUT
Idacorp
IDA
$7.86B
| $111K | ﹤0.01% |
1,200
-400
| -25% | -$37.5K |
|
5275
CALL
Navitas Semiconductor
NVTS
$2.87B
| $111K | ﹤0.01% |
28,300
-12,400
| -30% | -$52.2K |
|
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.