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 | |
|---|---|---|---|---|---|---|---|
8726
Mine Safety
MSA
$7.08B
| $1.57K | ﹤0.01% |
+9
| New | +$1.51K |
2026 Q2
0 quarters
|
|
8727
Granite Ridge Resources
GRNT
$774M
| $1.57K | ﹤0.01% |
356
-3,815
| -91% | -$20K |
2026 Q1
1 quarter
|
|
8728
CALL
FG Communities Holdings Inc. Common Stock
FGC
$28.4M
| $1.55K | ﹤0.01% |
+300
| New | +$1.92K |
2026 Q2
0 quarters
|
|
8729
FB Financial Corp
FBK
$2.67B
| $1.55K | ﹤0.01% |
28
-172
| -86% | -$9.24K |
2026 Q1
1 quarter
|
|
8730
iShares Bloomberg Roll Select Commodity Strategy ETF
CMDY
$754M
| $1.55K | ﹤0.01% |
28
-58
| -67% | -$3.47K |
2025 Q3
3 quarters
|
|
8731
Acco Brands
ACCO
$425M
| $1.53K | ﹤0.01% |
368
-2,805
| -88% | -$10.3K |
2026 Q1
1 quarter
|
|
8732
SI-BONE Inc
SIBN
$968M
| $1.52K | ﹤0.01% |
93
-549
| -86% | -$7.84K |
2025 Q3
3 quarters
|
|
8733
Ladder Capital
LADR
$1.17B
| $1.51K | ﹤0.01% |
+152
| New | +$1.54K |
2026 Q2
0 quarters
|
|
8734
Amplify Bitcoin Max Income Covered Call ETF
BAGY
$10.3M
| $1.51K | ﹤0.01% |
70
-100
| -59% | -$2.82K |
2025 Q4
2 quarters
|
|
8735
YieldMax PYPL Option Income Strategy ETF
PYPY
$13.3M
| $1.5K | ﹤0.01% |
60
+18
| +43% | +$498 |
2026 Q1
1 quarter
|
|
8736
T-REX 2X Long RBLX Daily Target ETF
RBLU
$13.7M
| $1.5K | ﹤0.01% |
168
+81
| +93% | +$692 |
2026 Q1
1 quarter
|
|
8737
CALL
Globus Maritime Ltd
GLBS
$65.2M
| $1.5K | ﹤0.01% |
500
| – | – |
2026 Q1
1 quarter
|
|
8738
National CineMedia
NCMI
$180M
| $1.49K | ﹤0.01% |
393
-7
| -2% | -$24 |
2025 Q3
3 quarters
|
|
8739
CALL
Central Puerto
CEPU
$1.77B
| $1.49K | ﹤0.01% |
+100
| New | +$1.51K |
2026 Q2
0 quarters
|
|
8740
CALL
Expro Ltd
XPRO
$1.87B
| $1.48K | ﹤0.01% |
100
-27,100
| -100% | -$435K |
2024 Q4
6 quarters
|
|
8741
CALL
TROOPS Inc
TROO
$263M
| $1.48K | ﹤0.01% |
600
-600
| -50% | -$1.89K |
2025 Q4
2 quarters
|
|
8742
PUT
1stdibs.com
DIBS
$146M
| $1.47K | ﹤0.01% |
+300
| New | +$1.45K |
2026 Q2
0 quarters
|
|
8743
CALL
Stoneridge
SRI
$162M
| $1.46K | ﹤0.01% |
+200
| New | +$1.37K |
2026 Q2
0 quarters
|
|
8744
Hoya Capital High Dividend Yield ETF
RIET
$98.2M
| $1.46K | ﹤0.01% |
+150
| New | +$1.43K |
2026 Q2
0 quarters
|
|
8745
Global Water Resources
GWRS
$229M
| $1.46K | ﹤0.01% |
201
-800
| -80% | -$5.79K |
2025 Q3
3 quarters
|
|
8746
CALL
Skye Bioscience
SKYE
$7.04M
| $1.46K | ﹤0.01% |
263
-25
| -9% | -$157 |
2025 Q2
4 quarters
|
|
8747
Hain Celestial
HAIN
$13.9M
| $1.45K | ﹤0.01% |
2,591
-5,429
| -68% | -$4.03K |
2024 Q1
9 quarters
|
|
8748
Seer Inc
SEER
$108M
| $1.44K | ﹤0.01% |
+867
| New | +$1.57K |
2026 Q2
0 quarters
|
|
8749
PUT
Beam Global
BEEM
$21M
| $1.43K | ﹤0.01% |
1,100
+1,000
| +1,000% | +$1.53K |
2025 Q4
2 quarters
|
|
8750
AdvisorShares Pure Cannabis ETF
YOLO
$29.6M
| $1.43K | ﹤0.01% |
495
-3,059
| -86% | -$9.06K |
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.