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 |
iShares Russell 2000 ETF
IWM
|
+$146M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$108M |
| 3 |
Apple
AAPL
|
+$62.9M |
| 4 |
Tesla
TSLA
|
+$51.9M |
| 5 |
Micron Technology
MU
|
+$39.5M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$108M |
| 2 |
Meta Platforms (Facebook)
META
|
+$104M |
| 3 |
Advanced Micro Devices
AMD
|
+$92.1M |
| 4 |
Amazon
AMZN
|
+$90.3M |
| 5 |
TSMC
TSM
|
+$82.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 98.28% |
| 2 | Technology | 0.76% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Communication Services | 0.19% |
| 5 | Healthcare | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | Held Since | |
|---|---|---|---|---|---|---|---|
6051
Riley Exploration Permian
REPX
$1.16B
| $63.3K | ﹤0.01% |
+1,922
| New | +$68.5K |
2026 Q2
0 quarters
|
|
6052
AdvanSix
ASIX
$422M
| $63.3K | ﹤0.01% |
3,186
-21,486
| -87% | -$484K |
2026 Q1
1 quarter
|
|
6053
PUT
LKQ Corp
LKQ
$4.33B
| $63.2K | ﹤0.01% |
2,400
-7,500
| -76% | -$208K |
2018 Q1
33 quarters
|
|
6054
CALL
Blue Bird Corp
BLBD
$1.93B
| $63.2K | ﹤0.01% |
800
-1,300
| -62% | -$88.2K |
2023 Q1
13 quarters
|
|
6055
CALL
FNB Corp
FNB
$6.44B
| $63K | ﹤0.01% |
3,300
+2,500
| +313% | +$44.5K |
2020 Q1
25 quarters
|
|
6056
PUT
Rentokil
RTO
$11.5B
| $62.9K | ﹤0.01% |
2,200
+1,600
| +267% | +$50.8K |
2026 Q1
1 quarter
|
|
6057
Piper Sandler
PIPR
$4.61B
| $62.9K | ﹤0.01% |
+870
| New | +$70.5K |
2026 Q2
0 quarters
|
|
6058
CALL
Kadant
KAI
$3.17B
| $62.8K | ﹤0.01% |
200
-600
| -75% | -$187K |
2025 Q4
2 quarters
|
|
6059
CALL
Blink Charging
BLNK
$55.7M
| $62.8K | ﹤0.01% |
98,100
-42,200
| -30% | -$30.6K |
2020 Q1
25 quarters
|
|
6060
CALL
National Vision
EYE
$1.28B
| $62.7K | ﹤0.01% |
3,300
+1,800
| +120% | +$36.7K |
2024 Q1
9 quarters
|
|
6061
Global Partners
GLP
$1.61B
| $62.7K | ﹤0.01% |
+1,346
| New | +$63.5K |
2026 Q2
0 quarters
|
|
6062
Mirum Pharmaceuticals
MIRM
$5.56B
| $62.6K | ﹤0.01% |
535
+232
| +77% | +$23.3K |
2026 Q1
1 quarter
|
|
6063
FinVolution Group
FINV
$680M
| $62.5K | ﹤0.01% |
13,047
-3,204
| -20% | -$15.8K |
2026 Q1
1 quarter
|
|
6064
PUT
National Beverage
FIZZ
$3.27B
| $62.4K | ﹤0.01% |
2,000
+1,900
| +1,900% | +$66.2K |
2026 Q1
1 quarter
|
|
6065
PUT
Vuzix
VUZI
$189M
| $62.4K | ﹤0.01% |
21,500
+11,200
| +109% | +$35.3K |
2018 Q4
30 quarters
|
|
6066
PUT
Covista Inc
CVSA
$4.38B
| $62.3K | ﹤0.01% |
+500
| New | +$60.3K |
2026 Q2
0 quarters
|
|
6067
CALL
Industrial Logistics Properties Trust
ILPT
$493M
| $62.1K | ﹤0.01% |
7,000
+1,700
| +32% | +$13.2K |
2026 Q1
1 quarter
|
|
6068
Applied Optoelectronics
AAOI
$6.53B
| $62.1K | ﹤0.01% |
419
-39,484
| -99% | -$6.42M |
2025 Q3
3 quarters
|
|
6069
Leverage Shares 2X Long BMNR Daily ETF
BMNG
$41.8M
| $62.1K | ﹤0.01% |
6,798
+6,779
| +35,679% | +$150K |
2026 Q1
1 quarter
|
|
6070
Simplify Short Term Treasury Futures Strategy ETF
TUA
$489M
| $62.1K | ﹤0.01% |
3,038
-3,003
| -50% | -$62.3K |
2026 Q1
1 quarter
|
|
6071
PUT
Jones Lang LaSalle
JLL
$13.8B
| $62K | ﹤0.01% |
200
-100
| -33% | -$31.1K |
2023 Q1
13 quarters
|
|
6072
CALL
Diana Shipping
DSX
$312M
| $62K | ﹤0.01% |
29,500
+26,400
| +852% | +$65.2K |
2025 Q3
3 quarters
|
|
6073
PUT
First Trust US Equity Opportunities ETF
FPX
$1.39B
| $61.9K | ﹤0.01% |
300
| – | – |
2026 Q1
1 quarter
|
|
6074
SCHMID Group
SHMD
$199M
| $61.8K | ﹤0.01% |
+9,873
| New | +$60.6K |
2026 Q2
0 quarters
|
|
6075
Aldeyra Therapeutics
ALDX
$38.7M
| $61.7K | ﹤0.01% |
+28,957
| New | +$49.8K |
2026 Q2
0 quarters
|
|
Similar funds
Simplex Trading's Q2 2026 Portfolio in Review
As of Q2 2026, Simplex Trading held 10,638 positions worth $171B, up 14% from $149B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q2 2026 filing shows 1,714 new, 3,712 increased, 3,486 reduced and 1,487 closed positions. Its largest new stake was Micron Technology: 52,682 shares worth $60.8M. The largest sale was State Street SPDR S&P 500 ETF Trust, an estimated $108M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, down from 98% a quarter earlier, followed by Technology and Consumer Discretionary.
- Simplex Trading's largest Q2 2026 buy was Micron Technology: 52,682 shares worth $60.8M.
- Simplex Trading added most to iShares Russell 2000 ETF in Q2 2026, an estimated $146M increase.
- Simplex Trading's biggest Q2 2026 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $108M.
- Simplex Trading fully exited Intel in Q2 2026, selling an estimated $76.6M.
- Simplex Trading's ten largest holdings make up 50% of its $171B portfolio in Q2 2026.
- Simplex Trading opened 1,714 new positions and closed 1,487 in Q2 2026.
- Simplex Trading's portfolio value rose 14% quarter-over-quarter to $171B.
Based on Simplex Trading's 13F filing for Q2 2026, filed 12 Aug 2026.