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 | |
|---|---|---|---|---|---|---|
5126
First Trust NASDAQ-100 Technology Index Fund
QTEC
$4.51B
| $127K | ﹤0.01% |
+645
| New | +$121K |
|
5127
PUT
Revolve Group
RVLV
$1.82B
| $127K | ﹤0.01% |
8,000
+1,300
| +19% | +$24.9K |
|
5128
PUT
Highwoods Properties
HIW
$3.73B
| $126K | ﹤0.01% |
4,800
-1,900
| -28% | -$48.7K |
|
5129
PUT
Inovio Pharmaceuticals
INO
$54M
| $126K | ﹤0.01% |
15,600
-14,900
| -49% | -$157K |
|
|
KC
5130
CALL
Kingsoft Cloud Holdings
KC
$3.04B
| $126K | ﹤0.01% |
50,300
+3,400
| +7% | +$10K |
|
|
NGD
5131
DELISTED
New Gold Inc
NGD
| $126K | ﹤0.01% |
65,042
+29,106
| +81% | +$55.3K |
|
5132
CALL
STAG Industrial
STAG
$7.43B
| $126K | ﹤0.01% |
3,500
-43,100
| -92% | -$1.53M |
|
5133
PUT
Alkami Technology
ALKT
$1.91B
| $125K | ﹤0.01% |
4,400
-11,300
| -72% | -$292K |
|
5134
CALL
Brighthouse Financial
BHF
$3.64B
| $125K | ﹤0.01% |
2,900
-5,500
| -65% | -$254K |
|
5135
CALL
Ezcorp Inc
EZPW
$1.79B
| $125K | ﹤0.01% |
12,000
+1,600
| +15% | +$16.9K |
|
5136
CALL
LGI Homes
LGIH
$1.33B
| $125K | ﹤0.01% |
1,400
-5,300
| -79% | -$512K |
|
5137
Merchants Bancorp
MBIN
$2.55B
| $125K | ﹤0.01% |
3,103
-1,529
| -33% | -$62.7K |
|
5138
PUT
Seres Therapeutics
MCRB
$46.3M
| $125K | ﹤0.01% |
8,690
+5,140
| +145% | +$85.7K |
|
5139
Rocket Pharmaceuticals
RCKT
$351M
| $125K | ﹤0.01% |
+5,825
| New | +$134K |
|
5140
CALL
Sonos
SONO
$1.72B
| $125K | ﹤0.01% |
8,500
+3,300
| +63% | +$54.8K |
|
5141
PUT
Gerdau
GGB
$9.74B
| $124K | ﹤0.01% |
37,800
+32,280
| +585% | +$114K |
|
5142
CALL
NGL Energy Partners
NGL
$2.01B
| $124K | ﹤0.01% |
24,600
-46,000
| -65% | -$260K |
|
5143
PUT
Progress Software
PRGS
$1.65B
| $124K | ﹤0.01% |
2,300
-137,300
| -98% | -$6.97M |
|
5144
CALL
Protagonist Therapeutics
PTGX
$8.92B
| $124K | ﹤0.01% |
3,600
+700
| +24% | +$20.5K |
|
5145
Safe Bulkers
SB
$810M
| $124K | ﹤0.01% |
+21,413
| New | +$115K |
|
|
SKE
5146
Skeena Resources
SKE
$3.39B
| $124K | ﹤0.01% |
23,096
+12,080
| +110% | +$56.9K |
|
5147
CALL
X4 Pharmaceuticals
XFOR
$377M
| $124K | ﹤0.01% |
7,180
-857
| -11% | -$28K |
|
|
EVA
5148
PUT
DELISTED
Enviva Inc.
EVA
| $124K | ﹤0.01% |
290,400
-139,400
| -32% | -$70.1K |
|
5149
BARK
BARK
$77.6M
| $123K | ﹤0.01% |
3,409
+188
| +6% | +$4.82K |
|
5150
CALL
Bain Capital Specialty
BCSF
$810M
| $123K | ﹤0.01% |
7,600
+5,400
| +245% | +$88K |
|
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.