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 | |
|---|---|---|---|---|---|---|---|
7651
CALL
LCI Industries
LCII
$2.06B
| $10.6K | ﹤0.01% |
100
-1,700
| -94% | -$187K |
2026 Q1
1 quarter
|
|
7652
RBB Bancorp
RBB
$447M
| $10.6K | ﹤0.01% |
+386
| New | +$9.26K |
2026 Q2
0 quarters
|
|
7653
PUT
Telus
TU
$13.9B
| $10.6K | ﹤0.01% |
1,000
-3,600
| -78% | -$43.9K |
2025 Q4
2 quarters
|
|
7654
PUT
Forward Industries Inc
FWDI
$519M
| $10.6K | ﹤0.01% |
2,500
+1,800
| +257% | +$8.03K |
2025 Q3
3 quarters
|
|
7655
CALL
KB Financial Group
KB
$40.3B
| $10.5K | ﹤0.01% |
100
-1,100
| -92% | -$116K |
2025 Q2
4 quarters
|
|
7656
Regencell Bioscience
RGC
$3.8B
| $10.5K | ﹤0.01% |
+1,717
| New | +$41.2K |
2026 Q2
0 quarters
|
|
7657
PUT
Agilysys
AGYS
$3.4B
| $10.4K | ﹤0.01% |
100
-100
| -50% | -$7.74K |
2026 Q1
1 quarter
|
|
7658
CALL
iShares MSCI Emerging Markets Quality Factor ETF
EQLT
$11.2M
| $10.4K | ﹤0.01% |
+300
| New | +$11.3K |
2026 Q2
0 quarters
|
|
7659
GraniteShares 2x Long UBER Daily ETF
UBRL
$27.1M
| $10.4K | ﹤0.01% |
701
+379
| +118% | +$6.05K |
2026 Q1
1 quarter
|
|
7660
CALL
Vivani Medical
VANI
$100M
| $10.4K | ﹤0.01% |
8,400
+5,100
| +155% | +$6.16K |
2024 Q1
9 quarters
|
|
7661
PUT
Agenus
AGEN
$286M
| $10.4K | ﹤0.01% |
3,400
+200
| +6% | +$717 |
2019 Q4
26 quarters
|
|
7662
Neonode
NEON
$12.7M
| $10.4K | ﹤0.01% |
11,049
+7,100
| +180% | +$10.5K |
2024 Q2
8 quarters
|
|
7663
CALL
Ampco-Pittsburgh
AP
$162M
| $10.4K | ﹤0.01% |
+1,200
| New | +$12.2K |
2026 Q2
0 quarters
|
|
7664
Hawkins
HWKN
$2.76B
| $10.4K | ﹤0.01% |
73
-429
| -85% | -$67.8K |
2025 Q4
2 quarters
|
|
7665
PUT
Armata Pharmaceuticals
ARMP
$135M
| $10.4K | ﹤0.01% |
+1,600
| New | +$14.7K |
2026 Q2
0 quarters
|
|
7666
Sylvamo
SLVM
$1.29B
| $10.4K | ﹤0.01% |
+274
| New | +$11.1K |
2026 Q2
0 quarters
|
|
7667
PUT
Upexi
UPXI
$62.9M
| $10.4K | ﹤0.01% |
13,200
+9,100
| +222% | +$10.6K |
2025 Q2
4 quarters
|
|
|
SVC
7668
PUT
Service Properties Trust
SVC
$796M
| $10.3K | ﹤0.01% |
1,220
-500
| -29% | -$3.93K |
2021 Q2
20 quarters
|
|
7669
AerSale
ASLE
$223M
| $10.3K | ﹤0.01% |
1,628
+834
| +105% | +$5.45K |
2025 Q4
2 quarters
|
|
7670
CALL
Aveanna Healthcare
AVAH
$2.92B
| $10.3K | ﹤0.01% |
1,200
-5,000
| -81% | -$35.2K |
2026 Q1
1 quarter
|
|
7671
CALL
Monro
MNRO
$414M
| $10.3K | ﹤0.01% |
600
+400
| +200% | +$6.55K |
2023 Q1
13 quarters
|
|
7672
CALL
Viemed Healthcare
VMD
$373M
| $10.3K | ﹤0.01% |
900
-400
| -31% | -$3.96K |
2025 Q4
2 quarters
|
|
7673
PUT
Clearway Energy Class C
CWEN
$3.77B
| $10.3K | ﹤0.01% |
300
-200
| -40% | -$7.75K |
2018 Q1
33 quarters
|
|
7674
PUT
US Foods
USFD
$21.8B
| $10.2K | ﹤0.01% |
100
-13,800
| -99% | -$1.23M |
2018 Q2
32 quarters
|
|
7675
CALL
LENZ Therapeutics
LENZ
$99.3M
| $10.2K | ﹤0.01% |
1,800
-5,600
| -76% | -$45.1K |
2025 Q2
4 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.