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 | |
|---|---|---|---|---|---|---|---|
|
VWAV
7476
PUT
VisionWave Holdings
VWAV
$8.83M
| $12.9K | ﹤0.01% |
150
+125
| +500% | +$14.1K |
2025 Q3
3 quarters
|
|
7477
PUT
Arcos Dorados Holdings
ARCO
$1.7B
| $12.9K | ﹤0.01% |
1,600
-1,400
| -47% | -$12.1K |
2026 Q1
1 quarter
|
|
7478
CALL
Equity Lifestyle Properties
ELS
$11.8B
| $12.9K | ﹤0.01% |
200
-600
| -75% | -$37.9K |
2025 Q1
5 quarters
|
|
7479
ProShares Ultra Energy
DIG
$98.1M
| $12.9K | ﹤0.01% |
262
-224
| -46% | -$12.8K |
2025 Q4
2 quarters
|
|
7480
Apyx Medical
APYX
$100M
| $12.9K | ﹤0.01% |
2,867
-4,525
| -61% | -$17.9K |
2023 Q4
10 quarters
|
|
7481
CALL
Chicago Atlantic Real Estate Finance
REFI
$240M
| $12.9K | ﹤0.01% |
+1,200
| New | +$13.8K |
2026 Q2
0 quarters
|
|
7482
PUT
Viridian Therapeutics
VRDN
$2.53B
| $12.9K | ﹤0.01% |
700
-31,900
| -98% | -$514K |
2026 Q1
1 quarter
|
|
7483
Greenland Energy Co
GLND
$131M
| $12.8K | ﹤0.01% |
+5,836
| New | +$23.5K |
2026 Q2
0 quarters
|
|
7484
ProShares UltraShort QQQ
QID
$247M
| $12.8K | ﹤0.01% |
947
-25,949
| -96% | -$418K |
2025 Q3
3 quarters
|
|
7485
Casella Waste Systems
CWST
$6.21B
| $12.8K | ﹤0.01% |
+132
| New | +$11.3K |
2026 Q2
0 quarters
|
|
7486
PUT
HBT Financial
HBT
$1.32B
| $12.8K | ﹤0.01% |
+400
| New | +$11.5K |
2026 Q2
0 quarters
|
|
7487
CALL
Fomento Económico Mexicano
FMX
$43.8B
| $12.8K | ﹤0.01% |
100
| – | – |
2026 Q1
1 quarter
|
|
7488
CALL
Syntax Stratified LargeCap ETF
SSPY
$131M
| $12.8K | ﹤0.01% |
400
-1,200
| -75% | -$113K |
2026 Q1
1 quarter
|
|
7489
CALL
TON Strategy Co
TONX
$163M
| $12.7K | ﹤0.01% |
5,000
-10,600
| -68% | -$31.4K |
2025 Q3
3 quarters
|
|
7490
PUT
VistaGen Therapeutics
VTGN
$7.97M
| $12.7K | ﹤0.01% |
56,400
+47,500
| +534% | +$28.7K |
2025 Q3
3 quarters
|
|
7491
Franklin FTSE Brazil ETF
FLBR
$712M
| $12.7K | ﹤0.01% |
593
+494
| +499% | +$11.6K |
2026 Q1
1 quarter
|
|
7492
CALL
Teleflex
TFX
$5.77B
| $12.7K | ﹤0.01% |
+100
| New | +$12.8K |
2026 Q2
0 quarters
|
|
7493
PUT
KRONOS Worldwide
KRO
$900M
| $12.7K | ﹤0.01% |
2,000
-900
| -31% | -$6.17K |
2025 Q4
2 quarters
|
|
7494
CALL
LiveWire
LVWR
$339M
| $12.7K | ﹤0.01% |
11,300
-5,100
| -31% | -$7.69K |
2025 Q2
4 quarters
|
|
7495
PUT
Stevanato
STVN
$5.32B
| $12.6K | ﹤0.01% |
700
-300
| -30% | -$5.07K |
2025 Q3
3 quarters
|
|
7496
CALL
Dorchester Minerals
DMLP
$1.5B
| $12.6K | ﹤0.01% |
500
-2,200
| -81% | -$60K |
2019 Q1
29 quarters
|
|
7497
Farmland Partners
FPI
$447M
| $12.6K | ﹤0.01% |
1,304
+915
| +235% | +$9.7K |
2026 Q1
1 quarter
|
|
7498
PUT
Forrester Research
FORR
$238M
| $12.6K | ﹤0.01% |
1,500
-348,500
| -100% | -$2.28M |
2026 Q1
1 quarter
|
|
7499
PUT
Pattern Group Inc
PTRN
$2.87B
| $12.6K | ﹤0.01% |
500
-500
| -50% | -$8.48K |
2025 Q4
2 quarters
|
|
7500
PUT
Delcath Systems
DCTH
$500M
| $12.6K | ﹤0.01% |
1,000
+700
| +233% | +$7.74K |
2023 Q3
11 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.