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 | |
|---|---|---|---|---|---|---|
6176
ProShares Big Data Refiners ETF
DAT
$6.28M
| $56.8K | ﹤0.01% |
+1,348
| New | +$52.5K |
|
6177
Range Resources
RRC
$9.81B
| $56.7K | ﹤0.01% |
1,525
-34,795
| -96% | -$1.41M |
|
|
ORBS
6178
PUT
Eightco Holdings
ORBS
$351M
| $56.7K | ﹤0.01% |
81,500
-244,900
| -75% | -$220K |
|
6179
PUT
Cabaletta Bio
CABA
$588M
| $56.6K | ﹤0.01% |
+18,200
| New | +$59.9K |
|
|
GLWG
6180
Leverage Shares 2X Long GLW Daily ETF
GLWG
$91.9M
| $56.4K | ﹤0.01% |
+1,247
| New | +$32.8K |
|
6181
CALL
Sonoco
SON
$5.14B
| $56.4K | ﹤0.01% |
1,000
-33,200
| -97% | -$1.7M |
|
6182
PUT
Magnolia Oil & Gas
MGY
$6.35B
| $56.3K | ﹤0.01% |
2,200
+1,300
| +144% | +$37.1K |
|
6183
Lennox International
LII
$13.5B
| $56.1K | ﹤0.01% |
98
+76
| +345% | +$38.7K |
|
6184
PUT
Assured Guaranty
AGO
$3.33B
| $56.1K | ﹤0.01% |
700
-2,100
| -75% | -$166K |
|
6185
CALL
Encore Capital Group
ECPG
$2.06B
| $56K | ﹤0.01% |
+600
| New | +$48.9K |
|
6186
PUT
Gold Royalty Corp
GROY
$776M
| $55.8K | ﹤0.01% |
20,200
-67,900
| -77% | -$224K |
|
6187
PUT
Box
BOX
$4.83B
| $55.7K | ﹤0.01% |
2,100
+900
| +75% | +$22.5K |
|
6188
Direxion Daily MSCI Brazil Bull 2X ETF
BRZU
$111M
| $55.7K | ﹤0.01% |
+626
| New | +$65.8K |
|
6189
CALL
SLR Investment Corp
SLRC
$686M
| $55.7K | ﹤0.01% |
4,500
-4,500
| -50% | -$62.5K |
|
6190
CALL
Transcat
TRNS
$800M
| $55.7K | ﹤0.01% |
600
+200
| +50% | +$16.3K |
|
|
LITS
6191
CALL
Lite Strategy Inc
LITS
$38.8M
| $55.6K | ﹤0.01% |
60,300
-99,100
| -62% | -$103K |
|
6192
PUT
RAVE Restaurant Group
RAVE
$43.2M
| $55.6K | ﹤0.01% |
17,000
+16,900
| +16,900% | +$47.9K |
|
6193
CALL
MasterBrand
MBC
$1.73B
| $55.6K | ﹤0.01% |
5,400
+5,300
| +5,300% | +$45.3K |
|
6194
PUT
BOK Financial
BOKF
$8.31B
| $55.6K | ﹤0.01% |
+400
| New | +$52.9K |
|
|
MMED
6195
MiniMed Group Inc
MMED
$6.55B
| $55.3K | ﹤0.01% |
+3,698
| New | +$48.7K |
|
6196
CALL
Genasys
GNSS
$66M
| $55.3K | ﹤0.01% |
32,500
+32,300
| +16,150% | +$60.8K |
|
|
NSLR
6197
PUT
Neostellar Capital Corp
NSLR
$267M
| $55.2K | ﹤0.01% |
4,400
+3,500
| +389% | +$46.1K |
|
6198
Flux Power
FLUX
$12.7M
| $55.1K | ﹤0.01% |
63,756
+13,069
| +26% | +$13.9K |
|
6199
PUT
CVR Energy
CVI
$4.47B
| $55.1K | ﹤0.01% |
2,000
-800
| -29% | -$25.4K |
|
|
LOVE
6200
CALL
LoveSac
LOVE
$244M
| $55.1K | ﹤0.01% |
3,300
-66,000
| -95% | -$1.04M |
|
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.