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 | |
|---|---|---|---|---|---|---|---|
8626
Everforth Inc
EFOR
$1.68B
| $2.02K | ﹤0.01% |
+113
| New | +$2.76K |
2026 Q2
0 quarters
|
|
8627
PUT
Healthcare Realty
HR
$6.14B
| $2.02K | ﹤0.01% |
100
-300
| -75% | -$5.83K |
2020 Q1
25 quarters
|
|
8628
CALL
Invesco India ETF
IMVP
$92M
| $2.01K | ﹤0.01% |
100
-1,500
| -94% | -$31.5K |
2026 Q1
1 quarter
|
|
8629
PUT
Smart Sand
SND
$201M
| $2K | ﹤0.01% |
400
| – | – |
2025 Q4
2 quarters
|
|
8630
PUT
ICL Group
ICL
$6.08B
| $1.99K | ﹤0.01% |
+400
| New | +$2.28K |
2026 Q2
0 quarters
|
|
8631
PUT
Ladder Capital
LADR
$1.18B
| $1.99K | ﹤0.01% |
200
-800
| -80% | -$8.12K |
2019 Q3
27 quarters
|
|
8632
CALL
AdvanSix
ASIX
$423M
| $1.99K | ﹤0.01% |
100
-200
| -67% | -$4.5K |
2025 Q4
2 quarters
|
|
8633
Amplify CEF High Income ETF
YYY
$650M
| $1.98K | ﹤0.01% |
172
-286
| -62% | -$3.27K |
2024 Q2
8 quarters
|
|
8634
PUT
Certara
CERT
$1.54B
| $1.96K | ﹤0.01% |
300
-500
| -63% | -$2.82K |
2024 Q3
7 quarters
|
|
8635
CALL
Daktronics
DAKT
$936M
| $1.96K | ﹤0.01% |
+100
| New | +$1.98K |
2026 Q2
0 quarters
|
|
8636
CALL
Vera Bradley
VRA
$176M
| $1.94K | ﹤0.01% |
+500
| New | +$1.85K |
2026 Q2
0 quarters
|
|
8637
Direxion Daily AAPL Bear 1X ETF
AAPD
$19.5M
| $1.94K | ﹤0.01% |
+160
| New | +$1.99K |
2026 Q2
0 quarters
|
|
8638
Leverage Shares 2X Long COHR Daily ETF
COHH
$4M
| $1.93K | ﹤0.01% |
+137
| New | +$1.99K |
2026 Q2
0 quarters
|
|
8639
iShares MSCI Pacific ex Japan ETF
EPP
$2.21B
| $1.92K | ﹤0.01% |
36
-9
| -20% | -$494 |
2026 Q1
1 quarter
|
|
8640
CALL
Mizuho Financial
MFG
$117B
| $1.92K | ﹤0.01% |
+200
| New | +$1.8K |
2026 Q2
0 quarters
|
|
8641
PUT
Niagen Bioscience
NAGE
$199M
| $1.91K | ﹤0.01% |
600
-28,200
| -98% | -$114K |
2024 Q1
9 quarters
|
|
8642
CALL
OrthoPediatrics
KIDS
$645M
| $1.91K | ﹤0.01% |
+100
| New | +$1.74K |
2026 Q2
0 quarters
|
|
8643
PUT
Biomea Fusion
BMEA
$42.4M
| $1.91K | ﹤0.01% |
1,300
-1,400
| -52% | -$2.09K |
2023 Q1
13 quarters
|
|
8644
PUT
Yatsen Holding
YSG
$227M
| $1.9K | ﹤0.01% |
600
+500
| +500% | +$1.51K |
2025 Q2
4 quarters
|
|
8645
PUT
National Vision
EYE
$1.49B
| $1.9K | ﹤0.01% |
100
-800
| -89% | -$16.3K |
2022 Q2
16 quarters
|
|
8646
CALL
Bitwise Proficio Currency Debasement ETF
BPRO
$93.9M
| $1.89K | ﹤0.01% |
+100
| New | +$2.18K |
2026 Q2
0 quarters
|
|
8647
Green Dot
GDOT
$706M
| $1.89K | ﹤0.01% |
+140
| New | +$1.75K |
2026 Q2
0 quarters
|
|
8648
Defiance Daily Target 2x Long LLY ETF
LLYX
$52.5M
| $1.88K | ﹤0.01% |
+68
| New | +$1.42K |
2026 Q2
0 quarters
|
|
8649
Grayscale Solana Staking ETF
GSOL
$136M
| $1.88K | ﹤0.01% |
341
-5,750
| -94% | -$34.7K |
2025 Q4
2 quarters
|
|
8650
CALL
ZipRecruiter
ZIP
$384M
| $1.88K | ﹤0.01% |
500
+400
| +400% | +$1.24K |
2026 Q1
1 quarter
|
|
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.