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 | |
|---|---|---|---|---|---|---|---|
8276
CNO Financial Group
CNO
$5.13B
| $4.13K | ﹤0.01% |
+81
| New | +$3.76K |
2026 Q2
0 quarters
|
|
8277
CALL
NMI Holdings
NMIH
$3.2B
| $4.11K | ﹤0.01% |
100
-100
| -50% | -$3.82K |
2025 Q1
5 quarters
|
|
8278
CALL
The RMR Group
RMR
$301M
| $4.11K | ﹤0.01% |
200
-2,000
| -91% | -$37.8K |
2023 Q2
12 quarters
|
|
8279
Mesabi Trust
MSB
$252M
| $4.1K | ﹤0.01% |
162
-2,321
| -93% | -$63.8K |
2026 Q1
1 quarter
|
|
8280
Schwab Intermediately-Term US Treasury ETF
SCHR
$13.7B
| $4.09K | ﹤0.01% |
+166
| New | +$4.1K |
2026 Q2
0 quarters
|
|
8281
U.S. High Relative Profitability Portfolio ETF Class Shares
DUHP
$12.9B
| $4.09K | ﹤0.01% |
+98
| New | +$3.91K |
2026 Q2
0 quarters
|
|
8282
CALL
Proficient Auto Logistics
PAL
$76.6M
| $4.09K | ﹤0.01% |
600
-3,200
| -84% | -$21.4K |
2026 Q1
1 quarter
|
|
8283
CALL
IGC Pharma
IGC
$25.3M
| $4.08K | ﹤0.01% |
15,000
+11,700
| +355% | +$3.46K |
2025 Q4
2 quarters
|
|
8284
Mativ Holdings
MATV
$679M
| $4.08K | ﹤0.01% |
539
+396
| +277% | +$3.41K |
2026 Q1
1 quarter
|
|
8285
Arcturus Therapeutics
ARCT
$304M
| $4.08K | ﹤0.01% |
607
-17,559
| -97% | -$138K |
2026 Q1
1 quarter
|
|
8286
Leverage Shares 2X Long NET Daily ETF
NETG
$9.01M
| $4.08K | ﹤0.01% |
+303
| New | +$3.6K |
2026 Q2
0 quarters
|
|
8287
Invesco Water Resources ETF
PHO
$1.99B
| $4.08K | ﹤0.01% |
+59
| New | +$3.98K |
2026 Q2
0 quarters
|
|
8288
T-REX 2X Inverse CRWV Daily Target ETF
CORD
$49.1M
| $4.07K | ﹤0.01% |
741
-50
| -6% | -$315 |
2025 Q4
2 quarters
|
|
8289
CGI
GIB
$16.9B
| $4.07K | ﹤0.01% |
+63
| New | +$4.3K |
2026 Q2
0 quarters
|
|
8290
PUT
Franklin International Low Volatility High Dividend Index ETF
LVHI
$6.14B
| $4.06K | ﹤0.01% |
+100
| New | +$4.08K |
2026 Q2
0 quarters
|
|
8291
CALL
Grayscale XRP Trust ETF
GXRP
$61.6M
| $4.05K | ﹤0.01% |
200
-2,600
| -93% | -$65.8K |
2026 Q1
1 quarter
|
|
|
8292
PUT
Grayscale XRP Trust ETF
GXRP
$61.6M
| $4.05K | ﹤0.01% |
200
-100
| -33% | -$2.53K |
2026 Q1
1 quarter
|
|
8293
Telecom Argentina
TEO
$5.43B
| $4K | ﹤0.01% |
+308
| New | +$3.88K |
2026 Q2
0 quarters
|
|
8294
PUT
Vertical Aerospace
EVTL
$67.9M
| $4K | ﹤0.01% |
2,300
-43,500
| -95% | -$104K |
2025 Q2
4 quarters
|
|
8295
TIM SA
TIMB
$9.23B
| $3.98K | ﹤0.01% |
+186
| New | +$4.43K |
2026 Q2
0 quarters
|
|
8296
Cardiff Oncology
CRDF
$72.4M
| $3.98K | ﹤0.01% |
3,060
-13,394
| -81% | -$21.3K |
2026 Q1
1 quarter
|
|
8297
PUT
Veritone
VERI
$57M
| $3.97K | ﹤0.01% |
2,900
-11,300
| -80% | -$21.6K |
2020 Q2
24 quarters
|
|
8298
Schwab US Large-Cap Value ETF
SCHV
$15.6B
| $3.97K | ﹤0.01% |
+114
| New | +$3.76K |
2026 Q2
0 quarters
|
|
8299
GraniteShares YieldBOOST Bitcoin ETF
XBTY
$10.3M
| $3.95K | ﹤0.01% |
714
+574
| +410% | +$3.77K |
2025 Q3
3 quarters
|
|
8300
CALL
Superior Group of Companies
SGC
$208M
| $3.94K | ﹤0.01% |
+300
| New | +$3.6K |
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.