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 | |
|---|---|---|---|---|---|---|---|
7551
CALL
Blackbaud
BLKB
$2.52B
| $11.8K | ﹤0.01% |
400
-100
| -20% | -$3.29K |
2026 Q1
1 quarter
|
|
7552
CALL
Tanger
SKT
$4.19B
| $11.8K | ﹤0.01% |
300
+100
| +50% | +$3.7K |
2021 Q2
20 quarters
|
|
7553
Televisa
TV
$1.24B
| $11.8K | ﹤0.01% |
+4,349
| New | +$12.5K |
2026 Q2
0 quarters
|
|
7554
State Street SPDR Nuveen ICE High Yield Municipal Bond ETF
HYMB
$3.81B
| $11.8K | ﹤0.01% |
463
+301
| +186% | +$7.56K |
2026 Q1
1 quarter
|
|
7555
Aviat Networks
AVNW
$246M
| $11.7K | ﹤0.01% |
529
+484
| +1,076% | +$9.48K |
2026 Q1
1 quarter
|
|
7556
PUT
Marcus Corp
MCS
$862M
| $11.7K | ﹤0.01% |
500
+200
| +67% | +$3.93K |
2025 Q3
3 quarters
|
|
7557
CALL
Kartoon Studios
TOON
$32.2M
| $11.7K | ﹤0.01% |
16,500
+1,600
| +11% | +$1.15K |
2025 Q4
2 quarters
|
|
7558
CALL
Community Health Systems
CYH
$412M
| $11.7K | ﹤0.01% |
3,500
-6,900
| -66% | -$20.3K |
2026 Q1
1 quarter
|
|
7559
CALL
Neogen
NEOG
$2.66B
| $11.7K | ﹤0.01% |
1,300
-234,000
| -99% | -$2.15M |
2020 Q4
22 quarters
|
|
7560
PUT
LATAM Airlines Group S.A.
LTM
$13.3B
| $11.7K | ﹤0.01% |
200
-1,300
| -87% | -$66.9K |
2025 Q3
3 quarters
|
|
7561
Pulse Biosciences
PLSE
$3.78B
| $11.6K | ﹤0.01% |
+420
| New | +$9.9K |
2026 Q2
0 quarters
|
|
7562
NMI Holdings
NMIH
$3.2B
| $11.6K | ﹤0.01% |
283
+220
| +349% | +$8.41K |
2026 Q1
1 quarter
|
|
7563
PUT
Autoliv
ALV
$8.26B
| $11.6K | ﹤0.01% |
+100
| New | +$11.9K |
2026 Q2
0 quarters
|
|
7564
CALL
Farmland Partners
FPI
$447M
| $11.6K | ﹤0.01% |
1,200
-1,100
| -48% | -$11.7K |
2024 Q3
7 quarters
|
|
7565
American Vanguard Corp
AVD
$30.4M
| $11.6K | ﹤0.01% |
4,147
+3,778
| +1,024% | +$10.3K |
2021 Q1
21 quarters
|
|
7566
PUT
Galectin Therapeutics
GALT
$322M
| $11.6K | ﹤0.01% |
2,500
-4,800
| -66% | -$12.4K |
2018 Q1
33 quarters
|
|
7567
iShares Global Energy ETF
IXC
$3.37B
| $11.6K | ﹤0.01% |
+236
| New | +$12.8K |
2026 Q2
0 quarters
|
|
|
LJIM
7568
CALL
DELISTED
Long Cramer Tracker ETF
LJIM
| $11.6K | ﹤0.01% |
+200
| New | +$11.6K |
2026 Q2
0 quarters
|
|
7569
Metallus
MTUS
$846M
| $11.6K | ﹤0.01% |
619
-3,550
| -85% | -$66.7K |
2025 Q2
4 quarters
|
|
7570
PUT
Titan International
TWI
$436M
| $11.6K | ﹤0.01% |
1,500
| – | – |
2025 Q1
5 quarters
|
|
7571
Subversive Congressional Democrats Trading ETF
NANC
$287M
| $11.5K | ﹤0.01% |
228
-2,079
| -90% | -$99.4K |
2025 Q3
3 quarters
|
|
7572
CALL
Peoples Bancorp
PEBO
$1.37B
| $11.5K | ﹤0.01% |
+300
| New | +$10.5K |
2026 Q2
0 quarters
|
|
7573
ProShares UltraShort Semiconductors
SSG
$43.2M
| $11.5K | ﹤0.01% |
+1,009
| New | +$16.5K |
2026 Q2
0 quarters
|
|
7574
PUT
SiteOne Landscape Supply
SITE
$4.5B
| $11.4K | ﹤0.01% |
+100
| New | +$12.1K |
2026 Q2
0 quarters
|
|
7575
CALL
SPS Commerce
SPSC
$3.33B
| $11.4K | ﹤0.01% |
200
-100
| -33% | -$5.52K |
2023 Q4
10 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.