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 | |
|---|---|---|---|---|---|---|---|
6701
So-Young International
SY
$214M
| $31.7K | ﹤0.01% |
21,430
-4,837
| -18% | -$11.6K |
2024 Q4
6 quarters
|
|
6702
CALL
GPGI Inc
GPGI
$3.14B
| $31.7K | ﹤0.01% |
2,000
-27,900
| -93% | -$399K |
2024 Q1
9 quarters
|
|
6703
CALL
Envista
NVST
$3.77B
| $31.6K | ﹤0.01% |
1,200
+1,100
| +1,100% | +$27.8K |
2026 Q1
1 quarter
|
|
6704
abrdn Bloomberg All Commodity Strategy K-1 Free ETF
BCI
$3.51B
| $31.6K | ﹤0.01% |
+1,415
| New | +$34.3K |
2026 Q2
0 quarters
|
|
6705
GraniteShares YieldBOOST NVDA ETF
NVYY
$26M
| $31.5K | ﹤0.01% |
2,484
+1,885
| +315% | +$26.1K |
2026 Q1
1 quarter
|
|
6706
CALL
Ardent Health
ARDT
$1.74B
| $31.5K | ﹤0.01% |
3,200
+600
| +23% | +$5.69K |
2024 Q3
7 quarters
|
|
6707
Invesco Dorsey Wright Technology Momentum ETF
PTF
$592M
| $31.5K | ﹤0.01% |
+231
| New | +$27.3K |
2026 Q2
0 quarters
|
|
6708
iShares MSCI Hong Kong ETF
EWH
$1.22B
| $31.4K | ﹤0.01% |
+1,501
| New | +$34.5K |
2026 Q2
0 quarters
|
|
6709
PUT
Velocity Financial
VEL
$608M
| $31.4K | ﹤0.01% |
1,700
-90,500
| -98% | -$1.65M |
2026 Q1
1 quarter
|
|
6710
PUT
Cadre Holdings
CDRE
$1.31B
| $31.4K | ﹤0.01% |
1,100
+500
| +83% | +$15.1K |
2025 Q2
4 quarters
|
|
6711
PUT
CareDx
CDNA
$3.58B
| $31.4K | ﹤0.01% |
+1,100
| New | +$23.9K |
2026 Q2
0 quarters
|
|
6712
Roundhill GOOGL WeeklyPay ETF
GOOW
$68.5M
| $31.3K | ﹤0.01% |
462
+461
| +46,100% | +$33.2K |
2025 Q4
2 quarters
|
|
6713
CALL
Dorian LPG
LPG
$2.39B
| $31.3K | ﹤0.01% |
900
-1,400
| -61% | -$55.1K |
2020 Q2
24 quarters
|
|
6714
PUT
American Healthcare REIT
AHR
$11.6B
| $31.3K | ﹤0.01% |
600
-400
| -40% | -$19.7K |
2026 Q1
1 quarter
|
|
6715
PUT
Bakkt Inc
BKKT
$219M
| $31.2K | ﹤0.01% |
4,000
+3,200
| +400% | +$28.7K |
2025 Q3
3 quarters
|
|
6716
PUT
Hannon Armstrong Sustainable Infrastructure Capital
HASI
$4.67B
| $31.2K | ﹤0.01% |
800
-100
| -11% | -$4K |
2026 Q1
1 quarter
|
|
6717
Canaan Creative
CAN
$155M
| $31.2K | ﹤0.01% |
108,823
+78,586
| +260% | +$34.1K |
2025 Q4
2 quarters
|
|
6718
CALL
WesBanco
WSBC
$3.76B
| $31.2K | ﹤0.01% |
+800
| New | +$28.2K |
2026 Q2
0 quarters
|
|
6719
CALL
Telecom Argentina
TEO
$5.12B
| $31.2K | ﹤0.01% |
2,400
+1,900
| +380% | +$23.9K |
2025 Q4
2 quarters
|
|
6720
GraniteShares ETF Trust GraniteShares 2x Long META Daily ETF
FBL
$135M
| $31.1K | ﹤0.01% |
1,488
-5,245
| -78% | -$134K |
2025 Q3
3 quarters
|
|
6721
Accelerant Holdings
ARX
$4.3B
| $31.1K | ﹤0.01% |
2,654
+2,096
| +376% | +$29.4K |
2025 Q4
2 quarters
|
|
6722
PUT
Community Healthcare Trust
CHCT
$371M
| $31.1K | ﹤0.01% |
1,700
-1,600
| -48% | -$27.8K |
2023 Q3
11 quarters
|
|
6723
West Fraser Timber
WFG
$5.47B
| $31.1K | ﹤0.01% |
459
+383
| +504% | +$25K |
2026 Q1
1 quarter
|
|
6724
CALL
AZZ Inc
AZZ
$4.05B
| $31K | ﹤0.01% |
+200
| New | +$28.4K |
2026 Q2
0 quarters
|
|
6725
Jones Lang LaSalle
JLL
$13.8B
| $31K | ﹤0.01% |
+100
| New | +$31.1K |
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.