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 | |
|---|---|---|---|---|---|---|
5426
PUT
Clene
CLNN
$64M
| $95K | ﹤0.01% |
3,360
-5
| -0.1% | -$37 |
|
5427
Idaho Strategic Resources
IDR
$450M
| $95K | ﹤0.01% |
9,691
+9,250
| +2,098% | +$86.1K |
|
5428
Magnolia Oil & Gas
MGY
$6.1B
| $95K | ﹤0.01% |
+3,778
| New | +$96.4K |
|
5429
PUT
Protolabs
PRLB
$1.78B
| $95K | ﹤0.01% |
3,100
-100
| -3% | -$3.17K |
|
5430
PUT
Perimeter Solutions
PRM
$5.07B
| $95K | ﹤0.01% |
+12,200
| New | +$91.2K |
|
5431
PUT
Rush Street Interactive
RSI
$2.81B
| $95K | ﹤0.01% |
10,000
+900
| +10% | +$7.21K |
|
5432
PUT
First Financial Corp
THFF
$957M
| $95K | ﹤0.01% |
+2,600
| New | +$95.5K |
|
|
VMEO
5433
DELISTED
Vimeo
VMEO
| $95K | ﹤0.01% |
25,586
-92,129
| -78% | -$349K |
|
5434
CALL
Ashland
ASH
$3.32B
| $94K | ﹤0.01% |
1,000
-2,200
| -69% | -$214K |
|
5435
CALL
AerSale
ASLE
$292M
| $94K | ﹤0.01% |
13,700
-28,500
| -68% | -$204K |
|
5436
CorVel
CRVL
$3.07B
| $94K | ﹤0.01% |
+1,116
| New | +$92.1K |
|
5437
CALL
Granite Ridge Resources
GRNT
$628M
| $94K | ﹤0.01% |
15,000
+14,200
| +1,775% | +$91.6K |
|
|
LSEA
5438
DELISTED
Landsea Homes
LSEA
| $94K | ﹤0.01% |
+10,268
| New | +$109K |
|
5439
PUT
MBIA
MBI
$263M
| $94K | ﹤0.01% |
17,300
-700
| -4% | -$4.19K |
|
|
MREO
5440
PUT
Mereo BioPharma
MREO
$53.6M
| $94K | ﹤0.01% |
26,300
-3,700
| -12% | -$12K |
|
5441
PUT
Progyny
PGNY
$2.44B
| $94K | ﹤0.01% |
3,300
-500
| -13% | -$15.1K |
|
5442
CALL
Stock Yards Bancorp
SYBT
$2.66B
| $94K | ﹤0.01% |
1,900
+1,800
| +1,800% | +$83.9K |
|
5443
ProShares Ultra Yen
YCL
$33.3M
| $94K | ﹤0.01% |
4,653
+3,308
| +246% | +$72.3K |
|
|
ROI
5444
CALL
DELISTED
WISDOMTREE LARGECAP GROWTH FUND
ROI
| $94K | ﹤0.01% |
2,100
+1,800
| +600% | +$80.6K |
|
5445
PUT
Century Aluminum
CENX
$4.43B
| $93K | ﹤0.01% |
5,600
+2,200
| +65% | +$37.5K |
|
5446
CALL
Digimarc Corp
DMRC
$148M
| $93K | ﹤0.01% |
3,000
+600
| +25% | +$15.3K |
|
5447
CALL
Euronet Worldwide
EEFT
$2.76B
| $93K | ﹤0.01% |
+900
| New | +$98.4K |
|
5448
MoonLake Immunotherapeutics
MLTX
$1.57B
| $93K | ﹤0.01% |
+2,118
| New | +$89.7K |
|
5449
CALL
Magnachip Semiconductor
MX
$119M
| $93K | ﹤0.01% |
19,100
+8,400
| +79% | +$42.2K |
|
5450
Ryman Hospitality Properties
RHP
$8.45B
| $93K | ﹤0.01% |
935
+837
| +854% | +$88.2K |
|
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.