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 | |
|---|---|---|---|---|---|---|
6026
PUT
Pliant Therapeutics
PLRX
$71.8M
| $65K | ﹤0.01% |
57,000
-8,200
| -13% | -$9.98K |
|
6027
PUT
LifeVantage
LFVN
$78.3M
| $64.9K | ﹤0.01% |
10,400
+6,900
| +197% | +$41.8K |
|
6028
CALL
US Commodity Index
USCI
$403M
| $64.8K | ﹤0.01% |
700
| – | – |
|
6029
CALL
Global X S&P 500 Covered Call ETF
XYLD
$3.35B
| $64.8K | ﹤0.01% |
+1,600
| New | +$64.5K |
|
6030
PUT
Protalix BioTherapeutics
PLX
$215M
| $64.8K | ﹤0.01% |
27,800
+1,800
| +7% | +$3.81K |
|
6031
PUT
Ryanair
RYAAY
$28.7B
| $64.8K | ﹤0.01% |
1,000
-12,900
| -93% | -$761K |
|
6032
PUT
Allogene Therapeutics
ALLO
$681M
| $64.5K | ﹤0.01% |
31,000
+3,200
| +12% | +$7.03K |
|
6033
CALL
Compañía de Minas Buenaventura
BVN
$8.61B
| $64.4K | ﹤0.01% |
2,200
+1,900
| +633% | +$64.5K |
|
|
HUYA
6034
CALL
Huya Inc
HUYA
$484M
| $64.4K | ﹤0.01% |
28,000
-20,200
| -42% | -$57.2K |
|
6035
Invesco KBW High Dividend Yield Financial ETF
KBWD
$412M
| $64.4K | ﹤0.01% |
5,182
+4,294
| +484% | +$54.6K |
|
6036
Federal Realty Investment Trust
FRT
$10.2B
| $64.3K | ﹤0.01% |
+521
| New | +$60.6K |
|
6037
PUT
Usana Health Sciences
USNA
$276M
| $64K | ﹤0.01% |
3,000
+1,300
| +76% | +$24.4K |
|
6038
Bread Financial
BFH
$4.26B
| $64K | ﹤0.01% |
+591
| New | +$53.1K |
|
|
CNR
6039
PUT
Core Natural Resources Inc
CNR
$4.94B
| $64K | ﹤0.01% |
800
-8,100
| -91% | -$718K |
|
6040
PUT
Fomento Económico Mexicano
FMX
$41B
| $64K | ﹤0.01% |
500
+200
| +67% | +$24.1K |
|
6041
Driven Brands
DRVN
$2.24B
| $63.9K | ﹤0.01% |
4,586
-10,098
| -69% | -$133K |
|
6042
CALL
Surgery Partners
SGRY
$1.87B
| $63.8K | ﹤0.01% |
3,800
-7,000
| -65% | -$98.3K |
|
6043
PUT
NRX Pharmaceuticals
NRXP
$151M
| $63.8K | ﹤0.01% |
15,600
+14,800
| +1,850% | +$48.9K |
|
6044
PUT
Credit Acceptance
CACC
$6.28B
| $63.7K | ﹤0.01% |
100
| – | – |
|
6045
CALL
ProQR Therapeutics
PRQR
$292M
| $63.6K | ﹤0.01% |
+34,200
| New | +$56.3K |
|
6046
PUT
Commerce Bancshares
CBSH
$8.37B
| $63.5K | ﹤0.01% |
1,100
-1,550
| -58% | -$81.3K |
|
6047
WillScot Mobile Mini Holdings
WSC
$3.62B
| $63.5K | ﹤0.01% |
2,201
+818
| +59% | +$19.8K |
|
|
GRSD
6048
Grandstand Ltd
GRSD
$67.6M
| $63.5K | ﹤0.01% |
33,417
+17,322
| +108% | +$53.9K |
|
|
CCC
6049
CALL
CCC Intelligent Solutions
CCC
$4.42B
| $63.5K | ﹤0.01% |
12,300
+1,700
| +16% | +$8.41K |
|
|
ECO
6050
Okeanis Eco Tankers
ECO
$2.79B
| $63.4K | ﹤0.01% |
+1,264
| New | +$65.9K |
|
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.