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 | |
|---|---|---|---|---|---|---|
5176
MacroGenics
MGNX
$240M
| $121K | ﹤0.01% |
28,657
+16,937
| +145% | +$165K |
|
5177
PUT
Perella Weinberg Partners
PWP
$1.09B
| $121K | ﹤0.01% |
7,500
+5,600
| +295% | +$84.5K |
|
5178
PUT
D-Wave Quantum Inc. Common Stock
QBTS
$6.66B
| $121K | ﹤0.01% |
107,000
+47,000
| +78% | +$66.2K |
|
5179
CALL
Rush Enterprises Class A
RUSHA
$6.21B
| $121K | ﹤0.01% |
2,900
-15,000
| -84% | -$689K |
|
5180
Simmons First National
SFNC
$3.38B
| $121K | ﹤0.01% |
+6,915
| New | +$122K |
|
5181
PUT
Adaptive Biotechnologies
ADPT
$3.87B
| $120K | ﹤0.01% |
33,300
-600
| -2% | -$1.9K |
|
5182
AerSale
ASLE
$291M
| $120K | ﹤0.01% |
17,352
-9,350
| -35% | -$66.9K |
|
5183
PUT
AXIS Capital
AXS
$7.67B
| $120K | ﹤0.01% |
1,700
+500
| +42% | +$33.9K |
|
5184
Bitwise Crypto Industry Innovators ETF
BITQ
$393M
| $120K | ﹤0.01% |
8,946
-10,696
| -54% | -$129K |
|
5185
Buckle
BKE
$2.27B
| $120K | ﹤0.01% |
+3,250
| New | +$122K |
|
5186
CALL
Cousins Properties
CUZ
$5.25B
| $120K | ﹤0.01% |
+5,200
| New | +$120K |
|
|
IAS
5187
PUT
DELISTED
Integral Ad Science
IAS
| $120K | ﹤0.01% |
12,400
-1,400
| -10% | -$13.4K |
|
5188
CALL
RxSight
RXST
$252M
| $120K | ﹤0.01% |
2,000
-5,300
| -73% | -$303K |
|
5189
Syndax Pharmaceuticals
SNDX
$1.73B
| $120K | ﹤0.01% |
5,873
-5,756
| -49% | -$120K |
|
|
TGB
5190
CALL
Trekor Metals
TGB
$2.59B
| $120K | ﹤0.01% |
49,100
-14,600
| -23% | -$37K |
|
5191
CALL
TriNet
TNET
$3.29B
| $120K | ﹤0.01% |
1,200
+1,100
| +1,100% | +$123K |
|
5192
DoorDash
DASH
$86.1B
| $119K | ﹤0.01% |
1,101
-72,351
| -99% | -$8.72M |
|
5193
PUT
Healthpeak Properties
DOC
$15.2B
| $119K | ﹤0.01% |
6,100
+600
| +11% | +$11.5K |
|
5194
CALL
Kymera Therapeutics
KYMR
$8.8B
| $119K | ﹤0.01% |
4,000
-4,700
| -54% | -$163K |
|
5195
CALL
Loews
L
$23.9B
| $119K | ﹤0.01% |
1,600
-2,900
| -64% | -$220K |
|
5196
CALL
Matrix Service
MTRX
$320M
| $119K | ﹤0.01% |
12,000
-5,400
| -31% | -$61.7K |
|
5197
CALL
Provident Financial Services
PFS
$3.24B
| $119K | ﹤0.01% |
8,300
+4,300
| +108% | +$62.5K |
|
5198
Semtech
SMTC
$10.7B
| $119K | ﹤0.01% |
3,990
-43,288
| -92% | -$1.51M |
|
5199
PUT
Upbound Group
UPBD
$1.17B
| $119K | ﹤0.01% |
3,900
-100
| -3% | -$3.19K |
|
5200
PUT
Essential Utilities
WTRG
$11.4B
| $119K | ﹤0.01% |
3,200
-3,000
| -48% | -$111K |
|
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.