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 | |
|---|---|---|---|---|---|---|---|
6076
Bullish
BLSH
$4.39B
| $61.7K | ﹤0.01% |
2,632
-19,485
| -88% | -$677K |
2026 Q1
1 quarter
|
|
6077
PUT
POSCO
PKX
$15.7B
| $61.7K | ﹤0.01% |
1,200
-700
| -37% | -$48K |
2022 Q3
15 quarters
|
|
6078
Starfighters Space Inc
FJET
$39.7M
| $61.6K | ﹤0.01% |
11,577
+10,508
| +983% | +$62.8K |
2025 Q4
2 quarters
|
|
6079
PUT
Once Upon a Farm PBC
OFRM
$675M
| $61.4K | ﹤0.01% |
3,000
-7,400
| -71% | -$121K |
2026 Q1
1 quarter
|
|
6080
CALL
Endava
DAVA
$104M
| $61.4K | ﹤0.01% |
21,700
-52,800
| -71% | -$195K |
2021 Q4
18 quarters
|
|
6081
PUT
WaFd
WAFD
$2.17B
| $61.4K | ﹤0.01% |
1,600
+1,500
| +1,500% | +$52.8K |
2026 Q1
1 quarter
|
|
6082
CALL
AGF US Market Neutral Anti-Beta Fund
BTAL
$340M
| $61.3K | ﹤0.01% |
+5,500
| New | +$66.9K |
2026 Q2
0 quarters
|
|
6083
PUT
Nomad Foods
NOMD
$1.65B
| $61.3K | ﹤0.01% |
5,600
-100
| -2% | -$995 |
2025 Q1
5 quarters
|
|
6084
PUT
ScottsMiracle-Gro
SMG
$3.46B
| $61.3K | ﹤0.01% |
900
+700
| +350% | +$43.4K |
2016 Q4
38 quarters
|
|
6085
Enlivex Ltd
ENLV
$4.14M
| $61.3K | ﹤0.01% |
464
+453
| +4,118% | +$83.8K |
2025 Q4
2 quarters
|
|
6086
Mizuho Financial
MFG
$117B
| $61.3K | ﹤0.01% |
+6,394
| New | +$57.4K |
2026 Q2
0 quarters
|
|
6087
CALL
Azenta
AZTA
$1.71B
| $61.2K | ﹤0.01% |
2,400
-7,100
| -75% | -$159K |
2021 Q2
20 quarters
|
|
6088
Priority Technology Holdings
PRTH
$646M
| $61.2K | ﹤0.01% |
9,169
+2,293
| +33% | +$13.3K |
2026 Q1
1 quarter
|
|
6089
PUT
Crescent Capital BDC
CCAP
$328M
| $61.2K | ﹤0.01% |
5,600
+900
| +19% | +$11K |
2024 Q3
7 quarters
|
|
6090
STAG Industrial
STAG
$6.98B
| $61K | ﹤0.01% |
+1,604
| New | +$61.3K |
2026 Q2
0 quarters
|
|
6091
CareCloud
CCLD
$73.9M
| $61K | ﹤0.01% |
28,756
+25,609
| +814% | +$66.2K |
2025 Q4
2 quarters
|
|
6092
Roundhill China Magnificent Seven ETF
MAGC
$12.1M
| $61K | ﹤0.01% |
+3,590
| New | +$70.9K |
2026 Q2
0 quarters
|
|
6093
CALL
Grocery Outlet
GO
$1.28B
| $60.9K | ﹤0.01% |
6,100
-77,800
| -93% | -$640K |
2019 Q3
27 quarters
|
|
6094
Hasbro
HAS
$16.7B
| $60.9K | ﹤0.01% |
+737
| New | +$66.3K |
2026 Q2
0 quarters
|
|
6095
Innventure Inc
INV
$26M
| $60.9K | ﹤0.01% |
12,004
+11,490
| +2,235% | +$67.6K |
2025 Q4
2 quarters
|
|
6096
Sprott Junior Copper Miners ETF
COPJ
$140M
| $60.8K | ﹤0.01% |
1,535
-5,381
| -78% | -$227K |
2025 Q4
2 quarters
|
|
6097
CALL
AnaptysBio
ANAB
$1.48B
| $60.8K | ﹤0.01% |
900
+500
| +125% | +$30.3K |
2024 Q3
7 quarters
|
|
6098
Avantis All International Markets Value ETF
AVNV
$74.4M
| $60.7K | ﹤0.01% |
+736
| New | +$61.4K |
2026 Q2
0 quarters
|
|
6099
PUT
Mama's Creations
MAMA
$612M
| $60.7K | ﹤0.01% |
3,400
-1,200
| -26% | -$18.2K |
2023 Q4
10 quarters
|
|
6100
Slide Insurance Holdings
SLDE
$3.32B
| $60.7K | ﹤0.01% |
3,133
+2,565
| +452% | +$46.4K |
2026 Q1
1 quarter
|
|
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.