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 | |
|---|---|---|---|---|---|---|
7226
CALL
Telos
TLS
$359M
| $17.5K | ﹤0.01% |
3,800
-8,700
| -70% | -$38.5K |
|
7227
CALL
Dakota Gold
DC
$798M
| $17.5K | ﹤0.01% |
4,100
-10,200
| -71% | -$55K |
|
7228
PUT
Energy Vault
NRGV
$698M
| $17.4K | ﹤0.01% |
3,700
+3,200
| +640% | +$14.3K |
|
7229
PUT
Mid Penn Bancorp
MPB
$948M
| $17.4K | ﹤0.01% |
500
| – | – |
|
|
BNC
7230
CEA Industries
BNC
$144M
| $17.4K | ﹤0.01% |
6,398
+4,868
| +318% | +$13.3K |
|
7231
Global X Dow 30 Covered Call ETF
DJIA
$193M
| $17.4K | ﹤0.01% |
786
-540
| -41% | -$11.7K |
|
7232
Sportsman's Warehouse
SPWH
$50.9M
| $17.4K | ﹤0.01% |
13,059
+10,950
| +519% | +$15K |
|
|
PNNT
7233
PUT
Pennant Park Investment Corp
PNNT
$244M
| $17.4K | ﹤0.01% |
+5,000
| New | +$20.8K |
|
7234
Direxion Daily Utilities Bull 3X ETF
UTSL
$43.7M
| $17.3K | ﹤0.01% |
380
+137
| +56% | +$6.31K |
|
7235
Globant
GLOB
$1.69B
| $17.3K | ﹤0.01% |
+598
| New | +$23.9K |
|
|
COYY
7236
GraniteShares YieldBOOST COIN ETF
COYY
$17.6M
| $17.3K | ﹤0.01% |
962
+739
| +331% | +$16.4K |
|
7237
DXC Technology
DXC
$1.86B
| $17.3K | ﹤0.01% |
1,952
-286
| -13% | -$2.96K |
|
7238
CALL
Dream Finders Homes
DFH
$1.25B
| $17.3K | ﹤0.01% |
+1,000
| New | +$14.7K |
|
7239
CALL
IT Tech Packaging
ITP
$2.74M
| $17.3K | ﹤0.01% |
93,300
+21,800
| +30% | +$4.26K |
|
7240
PUT
iHeartMedia
IHRT
$434M
| $17.2K | ﹤0.01% |
4,000
+1,500
| +60% | +$6.65K |
|
|
AMZW
7241
Roundhill AMZN WeeklyPay ETF
AMZW
$35.4M
| $17.1K | ﹤0.01% |
+477
| New | +$19.2K |
|
7242
Silgan Holdings
SLGN
$4.35B
| $17.1K | ﹤0.01% |
369
-405
| -52% | -$16.2K |
|
7243
Schwab International Dividend Equity ETF
SCHY
$2.6B
| $17.1K | ﹤0.01% |
539
+327
| +154% | +$10.6K |
|
7244
CALL
RLX Technology
RLX
$2.2B
| $17.1K | ﹤0.01% |
9,000
-300
| -3% | -$623 |
|
7245
F&G Annuities & Life
FG
$3.28B
| $17.1K | ﹤0.01% |
643
+91
| +16% | +$2.49K |
|
7246
ARK Web x.0 ETF
ARKW
$1.86B
| $17.1K | ﹤0.01% |
118
+12
| +11% | +$1.68K |
|
|
ORC
7247
Orchid Island Capital
ORC
$1.3B
| $17.1K | ﹤0.01% |
2,452
+948
| +63% | +$6.53K |
|
7248
CALL
Goldman Sachs BDC
GSBD
$1.12B
| $17.1K | ﹤0.01% |
1,800
-1,200
| -40% | -$11.1K |
|
|
UROY
7249
Uranium Royalty Corp
UROY
$1.69B
| $17.1K | ﹤0.01% |
+6,134
| New | +$21.5K |
|
7250
CALL
Alpha Teknova
TKNO
$372M
| $17K | ﹤0.01% |
3,000
+2,900
| +2,900% | +$11.5K |
|
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.