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 | |
|---|---|---|---|---|---|---|---|
8551
PUT
Adams Natural Resources Fund
PEO
$830M
| $2.47K | ﹤0.01% |
+100
| New | +$2.6K |
2026 Q2
0 quarters
|
|
8552
PUT
New Found Gold
NFGC
$603M
| $2.46K | ﹤0.01% |
1,600
+200
| +14% | +$383 |
2022 Q3
15 quarters
|
|
8553
PUT
Four Corners Property Trust
FCPT
$2.42B
| $2.46K | ﹤0.01% |
100
| – | – |
2025 Q4
2 quarters
|
|
8554
CALL
Franklin Covey
FC
$214M
| $2.45K | ﹤0.01% |
+100
| New | +$2.28K |
2026 Q2
0 quarters
|
|
8555
CALL
Westrock Coffee
WEST
$946M
| $2.43K | ﹤0.01% |
300
+200
| +200% | +$1.44K |
2026 Q1
1 quarter
|
|
8556
CALL
Smithfield Foods
SFD
$7.41B
| $2.43K | ﹤0.01% |
100
-4,300
| -98% | -$115K |
2025 Q2
4 quarters
|
|
8557
Direxion Daily MSCI Mexico Bull 3X ETF
MEXX
$14.9M
| $2.42K | ﹤0.01% |
+85
| New | +$2.66K |
2026 Q2
0 quarters
|
|
8558
Columbia Sportswear
COLM
$3.18B
| $2.41K | ﹤0.01% |
39
-172
| -82% | -$10.6K |
2026 Q1
1 quarter
|
|
8559
Accuray
ARAY
$16M
| $2.41K | ﹤0.01% |
9,329
+6,443
| +223% | +$2.4K |
2026 Q1
1 quarter
|
|
8560
State Street SPDR S&P Kensho Smart Mobility ETF
HAIL
$16M
| $2.4K | ﹤0.01% |
+60
| New | +$2.32K |
2026 Q2
0 quarters
|
|
8561
Orthofix Medical
OFIX
$407M
| $2.39K | ﹤0.01% |
262
-182
| -41% | -$2.01K |
2025 Q2
4 quarters
|
|
|
ORLG
8562
DELISTED
Leverage Shares 2X Long ORLY Daily ETF
ORLG
| $2.39K | ﹤0.01% |
+186
| New | +$2.41K |
2026 Q2
0 quarters
|
|
8563
PUT
Deluxe
DLX
$1.09B
| $2.39K | ﹤0.01% |
100
-2,800
| -97% | -$72.9K |
2020 Q1
25 quarters
|
|
8564
CALL
Tredegar Corp
TG
$280M
| $2.39K | ﹤0.01% |
+300
| New | +$2.54K |
2026 Q2
0 quarters
|
|
8565
PUT
TPG Mortgage Investment Trust
MITT
$174M
| $2.38K | ﹤0.01% |
300
-400
| -57% | -$3.12K |
2025 Q3
3 quarters
|
|
8566
Breakwave Tanker Shipping ETF
BWET
$242M
| $2.37K | ﹤0.01% |
16
-121
| -88% | -$20.4K |
2026 Q1
1 quarter
|
|
|
NAKA
8567
PUT
Nakamoto Inc
NAKA
$138M
| $2.37K | ﹤0.01% |
600
-70
| -10% | -$467 |
2025 Q3
3 quarters
|
|
|
AIFU
8568
AIFU Inc
AIFU
$67.1M
| $2.37K | ﹤0.01% |
+52
| New | +$1.96K |
2026 Q2
0 quarters
|
|
8569
Empire State Realty Trust
ESRT
$854M
| $2.36K | ﹤0.01% |
+437
| New | +$2.38K |
2026 Q2
0 quarters
|
|
8570
Diana Shipping
DSX
$315M
| $2.36K | ﹤0.01% |
1,339
-12,524
| -90% | -$30.9K |
2024 Q1
9 quarters
|
|
8571
WisdomTree Enhanced Commodity Strategy Fund
GCC
$330M
| $2.36K | ﹤0.01% |
+104
| New | +$2.56K |
2026 Q2
0 quarters
|
|
8572
PUT
Funko
FNKO
$394M
| $2.35K | ﹤0.01% |
400
| – | – |
2018 Q2
32 quarters
|
|
8573
PolyPid
PYPD
$104M
| $2.35K | ﹤0.01% |
+463
| New | +$2.14K |
2026 Q2
0 quarters
|
|
8574
PUT
DELISTED
Leggett & Platt
LEG
| $2.34K | ﹤0.01% |
200
-1,300
| -87% | -$13.7K |
2017 Q3
35 quarters
|
|
8575
Fold Holdings
FLD
$28M
| $2.34K | ﹤0.01% |
5,167
-235
| -4% | -$254 |
2025 Q3
3 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.