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 | |
|---|---|---|---|---|---|---|---|
6826
CALL
Invesco CurrencyShares Australian Dollar Trust
FXA
$94.1M
| $27.4K | ﹤0.01% |
400
-700
| -64% | -$49.2K |
2026 Q1
1 quarter
|
|
6827
PUT
LHA Market State Tactical Beta ETF
MSTB
$197M
| $27.4K | ﹤0.01% |
1,800
+300
| +20% | +$12.6K |
2023 Q4
10 quarters
|
|
6828
PUT
Community Health Systems
CYH
$412M
| $27.4K | ﹤0.01% |
8,200
+4,200
| +105% | +$12.4K |
2026 Q1
1 quarter
|
|
6829
Grayscale AI Compute ETF
GCPU
$7.77M
| $27.3K | ﹤0.01% |
651
-2,824
| -81% | -$115K |
2025 Q4
2 quarters
|
|
6830
CALL
Commercial Vehicle Group
CVGI
$117M
| $27.3K | ﹤0.01% |
5,900
+5,300
| +883% | +$24.9K |
2026 Q1
1 quarter
|
|
6831
CALL
Ceco Environmental
CECO
$2.87B
| $27.2K | ﹤0.01% |
300
| – | – |
2023 Q4
10 quarters
|
|
6832
CALL
Global X Zero Coupon Bond 2030 ETF
ZCBA
$962K
| $27.2K | ﹤0.01% |
+500
| New | +$24.7K |
2026 Q2
0 quarters
|
|
6833
American Healthcare REIT
AHR
$11.6B
| $27.2K | ﹤0.01% |
521
-1,107
| -68% | -$54.4K |
2026 Q1
1 quarter
|
|
6834
PUT
Voya Financial
VOYA
$8.68B
| $27.2K | ﹤0.01% |
300
-100
| -25% | -$8.14K |
2014 Q4
46 quarters
|
|
6835
PUT
TOYO Co
TOYO
$168M
| $27.1K | ﹤0.01% |
+3,900
| New | +$47.9K |
2026 Q2
0 quarters
|
|
6836
CALL
Postal Realty Trust
PSTL
$663M
| $27.1K | ﹤0.01% |
1,100
+900
| +450% | +$20.1K |
2022 Q1
17 quarters
|
|
6837
PUT
Brazil Potash Corp
GRO
$110M
| $27.1K | ﹤0.01% |
+12,600
| New | +$34.1K |
2026 Q2
0 quarters
|
|
6838
Alignment Healthcare
ALHC
$1.67B
| $27K | ﹤0.01% |
1,134
-2,238
| -66% | -$43K |
2026 Q1
1 quarter
|
|
6839
Open Text
OTEX
$6.77B
| $27K | ﹤0.01% |
1,219
-4,005
| -77% | -$90.8K |
2026 Q1
1 quarter
|
|
6840
Roundhill NVDA WeeklyPay ETF
NVDW
$106M
| $26.9K | ﹤0.01% |
757
+521
| +221% | +$20.3K |
2026 Q1
1 quarter
|
|
6841
CALL
Grayscale Chainlink Trust ETF
GLNK
$124M
| $26.9K | ﹤0.01% |
4,200
+3,100
| +282% | +$24.5K |
2025 Q4
2 quarters
|
|
6842
North American Construction
NOA
$306M
| $26.9K | ﹤0.01% |
2,021
+1,738
| +614% | +$24.5K |
2026 Q1
1 quarter
|
|
6843
CALL
James River Group Holdings
JRVR
$184M
| $26.8K | ﹤0.01% |
6,100
-1,200
| -16% | -$5.91K |
2026 Q1
1 quarter
|
|
6844
State Street SPDR S&P Software & Services ETF
XSW
$511M
| $26.8K | ﹤0.01% |
+156
| New | +$24.8K |
2026 Q2
0 quarters
|
|
6845
PUT
MasterBrand
MBC
$1.49B
| $26.8K | ﹤0.01% |
2,600
+2,400
| +1,200% | +$20.5K |
2025 Q4
2 quarters
|
|
6846
Tradr 2X Long USAR Daily ETF
USAX
$2.31M
| $26.7K | ﹤0.01% |
1,383
+1,075
| +349% | +$27.6K |
2026 Q1
1 quarter
|
|
6847
Invesco High Yield Equity Dividend Achievers ETF
PEY
$1.13B
| $26.7K | ﹤0.01% |
1,150
+1,149
| +114,900% | +$25.6K |
2026 Q1
1 quarter
|
|
6848
CALL
Seaport Entertainment Group
SEG
$291M
| $26.6K | ﹤0.01% |
1,000
+800
| +400% | +$18.8K |
2025 Q3
3 quarters
|
|
6849
PUT
ABM Industries
ABM
$3.15B
| $26.5K | ﹤0.01% |
600
-2,400
| -80% | -$98.4K |
2018 Q2
32 quarters
|
|
6850
CALL
City Holding Co
CHCO
$1.99B
| $26.5K | ﹤0.01% |
+200
| New | +$25.1K |
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.