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 | |
|---|---|---|---|---|---|---|---|
7051
PUT
RxSight
RXST
$209M
| $21.2K | ﹤0.01% |
4,400
| – | – |
2024 Q3
7 quarters
|
|
7052
Tradr 2X Long STX Daily ETF
STXX
$9.11M
| $21.1K | ﹤0.01% |
+352
| New | +$17.8K |
2026 Q2
0 quarters
|
|
7053
CALL
Insteel Industries
IIIN
$538M
| $21.1K | ﹤0.01% |
+700
| New | +$20.1K |
2026 Q2
0 quarters
|
|
7054
CALL
NB Bancorp
NBBK
$1.01B
| $21.1K | ﹤0.01% |
+1,000
| New | +$20.6K |
2026 Q2
0 quarters
|
|
7055
PUT
enCore Energy
EU
$136M
| $21.1K | ﹤0.01% |
16,100
-2,300
| -13% | -$3.87K |
2025 Q2
4 quarters
|
|
7056
PUT
Seven Hills Realty Trust
SEVN
$140M
| $21.1K | ﹤0.01% |
2,500
| – | – |
2024 Q3
7 quarters
|
|
7057
CALL
Prenetics Global
PRE
$339M
| $21K | ﹤0.01% |
1,100
+1,000
| +1,000% | +$18.5K |
2025 Q4
2 quarters
|
|
7058
Clarivate
CLVT
$1.2B
| $21K | ﹤0.01% |
9,734
-13,681
| -58% | -$33.4K |
2025 Q1
5 quarters
|
|
7059
Gilat Satellite Networks
GILT
$573M
| $21K | ﹤0.01% |
1,579
+874
| +124% | +$14.3K |
2026 Q1
1 quarter
|
|
7060
PUT
Civeo
CVEO
$289M
| $21K | ﹤0.01% |
+600
| New | +$19.3K |
2026 Q2
0 quarters
|
|
7061
CALL
Citizens & Northern Corp
CZNC
$498M
| $21K | ﹤0.01% |
900
+800
| +800% | +$17.7K |
2025 Q1
5 quarters
|
|
7062
PUT
Lazard
LAZ
$3.63B
| $21K | ﹤0.01% |
500
-2,800
| -85% | -$128K |
2015 Q3
43 quarters
|
|
7063
GCT Semiconductor Holding
GCTS
$119M
| $20.9K | ﹤0.01% |
+7,048
| New | +$15K |
2026 Q2
0 quarters
|
|
7064
CALL
BTCS Inc
BTCS
$56.7M
| $20.9K | ﹤0.01% |
18,800
+4,300
| +30% | +$6.93K |
2025 Q3
3 quarters
|
|
7065
PUT
Scansource
SCSC
$1.23B
| $20.8K | ﹤0.01% |
400
| – | – |
2026 Q1
1 quarter
|
|
7066
Tradr 2X Short LITE Daily ETF
LITZ
$19M
| $20.8K | ﹤0.01% |
+330
| New | +$24K |
2026 Q2
0 quarters
|
|
7067
PUT
Vox Royalty Corp
VOXR
$334M
| $20.8K | ﹤0.01% |
4,400
+3,800
| +633% | +$20.9K |
2026 Q1
1 quarter
|
|
7068
PUT
Phillips Edison & Co
PECO
$4.94B
| $20.8K | ﹤0.01% |
500
| – | – |
2025 Q1
5 quarters
|
|
7069
CALL
Materialise
MTLS
$495M
| $20.8K | ﹤0.01% |
2,800
+800
| +40% | +$4.74K |
2020 Q4
22 quarters
|
|
7070
PUT
Hayward Holdings
HAYW
$2.69B
| $20.8K | ﹤0.01% |
1,200
+400
| +50% | +$5.84K |
2021 Q1
21 quarters
|
|
7071
Tradr 2X Long AAOI Daily ETF
AAOX
$58.9M
| $20.8K | ﹤0.01% |
+657
| New | +$33.6K |
2026 Q2
0 quarters
|
|
7072
CALL
Alpine Income Property Trust
PINE
$290M
| $20.8K | ﹤0.01% |
1,000
+300
| +43% | +$5.82K |
2024 Q4
6 quarters
|
|
7073
Equity Lifestyle Properties
ELS
$11.8B
| $20.8K | ﹤0.01% |
322
+123
| +62% | +$7.77K |
2025 Q3
3 quarters
|
|
7074
CALL
Portland General Electric
POR
$5.24B
| $20.7K | ﹤0.01% |
400
-200
| -33% | -$10.1K |
2019 Q1
29 quarters
|
|
7075
CALL
Clean Energy Fuels
CLNE
$322M
| $20.7K | ﹤0.01% |
10,100
+1,000
| +11% | +$2.12K |
2021 Q2
20 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.