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 | |
|---|---|---|---|---|---|---|---|
9051
PUT
Kartoon Studios
TOON
$31.2M
| $213 | ﹤0.01% |
+300
| New | +$215 |
2026 Q2
0 quarters
|
|
9052
PUT
CEMIG Preferred Shares
CIG
$6.52B
| $210 | ﹤0.01% |
100
-800
| -89% | -$1.86K |
2026 Q1
1 quarter
|
|
9053
PUT
SkinHealth Systems
SKIN
$72.2M
| $207 | ﹤0.01% |
+15
| New | +$229 |
2026 Q2
0 quarters
|
|
9054
PUT
CalciMedica
CALC
$7.85M
| $206 | ﹤0.01% |
40
-20
| -33% | -$71 |
2026 Q1
1 quarter
|
|
9055
Cibus
CBUS
$107M
| $195 | ﹤0.01% |
+143
| New | +$204 |
2026 Q2
0 quarters
|
|
9056
CALL
Sachem Capital Corp
SACH
$39.6M
| $188 | ﹤0.01% |
200
| – | – |
2026 Q1
1 quarter
|
|
9057
Old National Bancorp
ONB
$9.5B
| $181 | ﹤0.01% |
+7
| New | +$168 |
2026 Q2
0 quarters
|
|
9058
CALL
SurgePays
SURG
$7.29M
| $180 | ﹤0.01% |
500
+400
| +400% | +$221 |
2025 Q3
3 quarters
|
|
9059
PUT
Natural Health Trends
NHTC
$7.17M
| $177 | ﹤0.01% |
100
-1,200
| -92% | -$3.15K |
2025 Q4
2 quarters
|
|
9060
PUT
Bioceres Crop Solutions
BIOX
$16.3M
| $175 | ﹤0.01% |
500
+400
| +400% | +$188 |
2026 Q1
1 quarter
|
|
9061
PUT
Ready Capital
RC
$167M
| $175 | ﹤0.01% |
+100
| New | +$176 |
2026 Q2
0 quarters
|
|
9062
T-Rex 2X Long Ether Daily Target ETF
ETU
$13.6M
| $172 | ﹤0.01% |
57
-2,172
| -97% | -$12.2K |
2025 Q1
5 quarters
|
|
9063
PUT
Permianville Royalty Trust
PVL
$59.7M
| $169 | ﹤0.01% |
+100
| New | +$186 |
2026 Q2
0 quarters
|
|
9064
CALL
Purple Biotech
PPBT
$1.71M
| $168 | ﹤0.01% |
+100
| New | +$337 |
2026 Q2
0 quarters
|
|
9065
Ellington Residential Mortgage REIT
EARN
$134M
| $167 | ﹤0.01% |
+38
| New | +$177 |
2026 Q2
0 quarters
|
|
9066
Global X MSCI Norway ETF
NORW
$93.7M
| $159 | ﹤0.01% |
+5
| New | +$188 |
2026 Q2
0 quarters
|
|
9067
PUT
MindWalk Holdings
HYFT
$56.5M
| $158 | ﹤0.01% |
+100
| New | +$140 |
2026 Q2
0 quarters
|
|
9068
Radware
RDWR
$1.25B
| $154 | ﹤0.01% |
+5
| New | +$138 |
2026 Q2
0 quarters
|
|
9069
Canary Litecoin ETF
LTCC
$7.38M
| $152 | ﹤0.01% |
15
+14
| +1,400% | +$176 |
2025 Q4
2 quarters
|
|
9070
PUT
WiMi Hologram Cloud
WIMI
$11.1M
| $151 | ﹤0.01% |
+100
| New | +$170 |
2026 Q2
0 quarters
|
|
|
BTLN
9071
Brightline Interactive
BTLN
$8.54M
| $150 | ﹤0.01% |
24
+11
| +85% | +$59 |
2024 Q4
6 quarters
|
|
9072
PUT
Diginex Ltd
DGNX
$36.4M
| $148 | ﹤0.01% |
100
+87
| +669% | +$180 |
2025 Q4
2 quarters
|
|
9073
PUT
Tenaya Therapeutics
TNYA
$87M
| $147 | ﹤0.01% |
200
-100
| -33% | -$76 |
2025 Q2
4 quarters
|
|
9074
FirstService
FSV
$6.43B
| $142 | ﹤0.01% |
1
-10
| -91% | -$1.39K |
2025 Q4
2 quarters
|
|
9075
Upstream Bio Inc
UPB
$164M
| $138 | ﹤0.01% |
+20
| New | +$168 |
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.