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 | |
|---|---|---|---|---|---|---|---|
8701
Four Corners Property Trust
FCPT
$2.41B
| $1.67K | ﹤0.01% |
68
+17
| +33% | +$423 |
2025 Q4
2 quarters
|
|
8702
Lands' End
LE
$281M
| $1.67K | ﹤0.01% |
+159
| New | +$1.83K |
2026 Q2
0 quarters
|
|
8703
PUT
Sify Technologies
SIFY
$827M
| $1.66K | ﹤0.01% |
+100
| New | +$1.54K |
2026 Q2
0 quarters
|
|
8704
PUT
Bausch + Lomb
BLCO
$6.18B
| $1.66K | ﹤0.01% |
100
-300
| -75% | -$4.77K |
2026 Q1
1 quarter
|
|
8705
CALL
IHS Holding
IHS
$2.85B
| $1.65K | ﹤0.01% |
200
-400
| -67% | -$3.3K |
2025 Q2
4 quarters
|
|
8706
American Homes 4 Rent
AMH
$11.5B
| $1.64K | ﹤0.01% |
+49
| New | +$1.55K |
2026 Q2
0 quarters
|
|
8707
Evergy
EVRG
$19.5B
| $1.64K | ﹤0.01% |
+19
| New | +$1.57K |
2026 Q2
0 quarters
|
|
8708
First Trust Global Wind Energy ETF
FAN
$186M
| $1.62K | ﹤0.01% |
65
-341
| -84% | -$8.77K |
2024 Q3
7 quarters
|
|
8709
Primis Financial Corp
FRST
$383M
| $1.62K | ﹤0.01% |
+99
| New | +$1.44K |
2026 Q2
0 quarters
|
|
8710
CALL
Greenlight Captial
GLRE
$496M
| $1.62K | ﹤0.01% |
+100
| New | +$1.72K |
2026 Q2
0 quarters
|
|
8711
PUT
TIC Solutions Inc
TIC
$2.09B
| $1.62K | ﹤0.01% |
200
-1,400
| -88% | -$11.8K |
2025 Q3
3 quarters
|
|
|
NVX
8712
PUT
NOVONIX
NVX
$50.6M
| $1.61K | ﹤0.01% |
350
| – | – |
2025 Q4
2 quarters
|
|
8713
PUT
Xencor
XNCR
$1.87B
| $1.61K | ﹤0.01% |
+100
| New | +$1.25K |
2026 Q2
0 quarters
|
|
8714
Orion Office REIT
ONL
$122M
| $1.6K | ﹤0.01% |
555
+508
| +1,081% | +$1.39K |
2025 Q4
2 quarters
|
|
8715
PUT
Microvision
MVIS
$37M
| $1.6K | ﹤0.01% |
327
+40
| +14% | +$330 |
2021 Q2
20 quarters
|
|
8716
YieldMax BABA Option Income Strategy ETF
BABO
$12.1M
| $1.6K | ﹤0.01% |
+218
| New | +$2.11K |
2026 Q2
0 quarters
|
|
|
NVX
8717
NOVONIX
NVX
$50.6M
| $1.6K | ﹤0.01% |
347
+113
| +48% | +$752 |
2025 Q4
2 quarters
|
|
8718
Direxion Dailly PLTR Bear 1X ETF
PLTD
$27.1M
| $1.59K | ﹤0.01% |
180
-2,989
| -94% | -$23.6K |
2026 Q1
1 quarter
|
|
8719
CALL
Natural Health Trends
NHTC
$7.07M
| $1.59K | ﹤0.01% |
900
-300
| -25% | -$788 |
2025 Q4
2 quarters
|
|
8720
SCYNEXIS
SCYX
$37.1M
| $1.59K | ﹤0.01% |
+391
| New | +$2.43K |
2026 Q2
0 quarters
|
|
8721
CALL
Mechanics Bancorp
MCHB
$3.36B
| $1.59K | ﹤0.01% |
100
-700
| -88% | -$10.5K |
2026 Q1
1 quarter
|
|
8722
CALL
Invesco Agriculture Commodity Strategy No K-1 ETF
PDBA
$475M
| $1.59K | ﹤0.01% |
+100
| New | +$3.64K |
2026 Q2
0 quarters
|
|
8723
First Trust Exchange-Traded Fund II First Trust Indxx Global Natural Resources Income ETF
FTRI
$118M
| $1.59K | ﹤0.01% |
+100
| New | +$1.73K |
2026 Q2
0 quarters
|
|
8724
PUT
Xeris Biopharma Holdings
XERS
$1.94B
| $1.58K | ﹤0.01% |
200
-6,000
| -97% | -$38.3K |
2026 Q1
1 quarter
|
|
8725
Roundhill Ether Covered Call Strategy ETF
YETH
$56.8M
| $1.58K | ﹤0.01% |
+199
| New | +$2.09K |
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.