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 | |
|---|---|---|---|---|---|---|---|
5876
CALL
New Found Gold
NFGC
$646M
| $75.3K | ﹤0.01% |
48,900
-36,200
| -43% | -$69.4K |
2025 Q2
4 quarters
|
|
5877
PUT
Global Ship Lease
GSL
$1.52B
| $75.2K | ﹤0.01% |
2,000
+1,300
| +186% | +$50.7K |
2021 Q4
18 quarters
|
|
5878
Covista Inc
CVSA
$4.24B
| $75.2K | ﹤0.01% |
603
-73
| -11% | -$8.8K |
2025 Q2
4 quarters
|
|
5879
CALL
Thor Industries
THO
$3.61B
| $75.2K | ﹤0.01% |
1,000
-100
| -9% | -$7.7K |
2016 Q1
41 quarters
|
|
5880
PUT
REalloys Inc
ALOY
$494M
| $75.1K | ﹤0.01% |
+5,200
| New | +$59.3K |
2026 Q2
0 quarters
|
|
5881
FerroAtlántica
GSM
$755M
| $75.1K | ﹤0.01% |
23,629
+11,576
| +96% | +$47.9K |
2025 Q3
3 quarters
|
|
5882
PUT
Fidelity Hedged Equity ETF
FHEQ
$1.01B
| $75.1K | ﹤0.01% |
+2,600
| New | +$83.9K |
2026 Q2
0 quarters
|
|
5883
CALL
E.W. Scripps
SSP
$216M
| $75.1K | ﹤0.01% |
27,100
+23,400
| +632% | +$88.6K |
2025 Q4
2 quarters
|
|
5884
PUT
Franklin Electric
FELE
$4.28B
| $75K | ﹤0.01% |
700
+500
| +250% | +$50.2K |
2025 Q4
2 quarters
|
|
5885
Direxion Daily Gold Miners Index Bull 2X ETF
NUGT
$860M
| $75K | ﹤0.01% |
641
-8,935
| -93% | -$1.52M |
2025 Q4
2 quarters
|
|
5886
CALL
Canaan Creative
CAN
$167M
| $75K | ﹤0.01% |
261,200
-48,300
| -16% | -$21K |
2021 Q2
20 quarters
|
|
|
WEAV
5887
CALL
DELISTED
Weave Communications
WEAV
| $74.9K | ﹤0.01% |
12,500
+8,500
| +213% | +$46.3K |
2023 Q2
12 quarters
|
|
5888
CALL
Integer Holdings
ITGR
$4.31B
| $74.8K | ﹤0.01% |
800
-1,000
| -56% | -$88.8K |
2025 Q4
2 quarters
|
|
5889
NeoVolta
NEOV
$132M
| $74.7K | ﹤0.01% |
23,721
+22,949
| +2,973% | +$58.1K |
2026 Q1
1 quarter
|
|
5890
CALL
DRDGold
DRD
$2.15B
| $74.6K | ﹤0.01% |
3,500
-6,600
| -65% | -$178K |
2019 Q1
29 quarters
|
|
5891
ChargePoint
CHPT
$249M
| $74.5K | ﹤0.01% |
12,607
-8,694
| -41% | -$56.9K |
2024 Q1
9 quarters
|
|
5892
PUT
Cathay General Bancorp
CATY
$4.27B
| $74.4K | ﹤0.01% |
1,200
+1,000
| +500% | +$56.7K |
2026 Q1
1 quarter
|
|
5893
PUT
Rush Street Interactive
RSI
$1.78B
| $74.4K | ﹤0.01% |
2,500
+2,100
| +525% | +$55.3K |
2023 Q1
13 quarters
|
|
5894
Direxion Daily Aerospace & Defense Bull 3X ETF
DFEN
$289M
| $74.3K | ﹤0.01% |
+930
| New | +$63.9K |
2026 Q2
0 quarters
|
|
5895
PUT
Astrana Health
ASTH
$1.81B
| $74.3K | ﹤0.01% |
1,600
-700
| -30% | -$25.2K |
2023 Q4
10 quarters
|
|
5896
GraniteShares HIPS US High Income ETF
HIPS
$94.6M
| $74.1K | ﹤0.01% |
+6,420
| New | +$75.2K |
2026 Q2
0 quarters
|
|
5897
PUT
DELISTED
Nuvalent
NUVL
| $74.1K | ﹤0.01% |
600
-400
| -40% | -$43K |
2024 Q2
8 quarters
|
|
5898
PUT
Banco Macro
BMA
$3.84B
| $74.1K | ﹤0.01% |
800
| – | – |
2016 Q4
38 quarters
|
|
5899
Oportun Financial
OPRT
$443M
| $74.1K | ﹤0.01% |
12,969
+7,663
| +144% | +$41K |
2024 Q2
8 quarters
|
|
5900
iShares Russell 3000 ETF
IWV
$20.6B
| $73.8K | ﹤0.01% |
+173
| New | +$71.3K |
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.