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 | |
|---|---|---|---|---|---|---|---|
6976
CALL
HighPeak Energy
HPK
$1.46B
| $23.1K | ﹤0.01% |
3,300
-9,600
| -74% | -$66.2K |
2022 Q3
15 quarters
|
|
6977
Capital Southwest
CSWC
$1.43B
| $23.1K | ﹤0.01% |
970
-6,263
| -87% | -$147K |
2025 Q1
5 quarters
|
|
6978
CALL
Strategic Education
STRA
$1.82B
| $23K | ﹤0.01% |
+300
| New | +$23.7K |
2026 Q2
0 quarters
|
|
6979
CALL
Installed Building Products
IBP
$5.29B
| $23K | ﹤0.01% |
+100
| New | +$24.3K |
2026 Q2
0 quarters
|
|
6980
CALL
AFC Gamma
AFCG
$67.6M
| $22.9K | ﹤0.01% |
7,400
-5,700
| -44% | -$17.9K |
2025 Q3
3 quarters
|
|
6981
Pennant Park Investment Corp
PNNT
$187M
| $22.9K | ﹤0.01% |
+6,607
| New | +$27.4K |
2026 Q2
0 quarters
|
|
6982
CALL
Camden Property Trust
CPT
$11.8B
| $22.9K | ﹤0.01% |
200
-7,200
| -97% | -$767K |
2025 Q2
4 quarters
|
|
|
6983
PUT
Camden Property Trust
CPT
$11.8B
| $22.9K | ﹤0.01% |
200
-300
| -60% | -$32K |
2023 Q1
13 quarters
|
|
6984
CALL
Southern Missouri Bancorp
SMBC
$792M
| $22.9K | ﹤0.01% |
+300
| New | +$20.7K |
2026 Q2
0 quarters
|
|
6985
Tradr 2X Short SNDK Daily ETF
SNDQ
$75.9M
| $22.9K | ﹤0.01% |
+1,173
| New | +$100K |
2026 Q2
0 quarters
|
|
6986
PUT
VSE Corp
VSEC
$3.99B
| $22.8K | ﹤0.01% |
100
-300
| -75% | -$57.6K |
2026 Q1
1 quarter
|
|
6987
Global X Gold Explorers ETF NEW
GOEX
$106M
| $22.8K | ﹤0.01% |
330
-17
| -5% | -$1.38K |
2025 Q3
3 quarters
|
|
6988
CALL
Park Hotels & Resorts
PK
$3.29B
| $22.8K | ﹤0.01% |
1,600
-3,300
| -67% | -$40.4K |
2019 Q3
27 quarters
|
|
|
AIFU
6989
PUT
AIFU Inc
AIFU
$63.8M
| $22.8K | ﹤0.01% |
500
+450
| +900% | +$16.9K |
2025 Q4
2 quarters
|
|
6990
PUT
Vista Gold
VGZ
$385M
| $22.7K | ﹤0.01% |
11,900
+1,300
| +12% | +$2.83K |
2025 Q1
5 quarters
|
|
6991
CALL
Graco
GGG
$10.7B
| $22.7K | ﹤0.01% |
300
-4,800
| -94% | -$379K |
2024 Q3
7 quarters
|
|
6992
Huntington Ingalls Industries
HII
$10.8B
| $22.7K | ﹤0.01% |
+81
| New | +$27.1K |
2026 Q2
0 quarters
|
|
6993
CALL
Nouveau Monde Graphite
NMG
$310M
| $22.6K | ﹤0.01% |
15,100
-30,400
| -67% | -$57.4K |
2025 Q4
2 quarters
|
|
|
TRLV
6994
PUT
Trulieve Cannabis Corp
TRLV
$2.01B
| $22.6K | ﹤0.01% |
+2,300
| New | +$22.2K |
2026 Q2
0 quarters
|
|
6995
PUT
Sasol
SSL
$11.6B
| $22.6K | ﹤0.01% |
2,300
-3,500
| -60% | -$44.2K |
2025 Q3
3 quarters
|
|
6996
CALL
OceanaGold Corp
OGC
$5.51B
| $22.6K | ﹤0.01% |
+900
| New | +$26.9K |
2026 Q2
0 quarters
|
|
6997
VistaShares Target 15 Berkshire Select Income ETF
OMAH
$1.15B
| $22.6K | ﹤0.01% |
1,224
+70
| +6% | +$1.3K |
2025 Q4
2 quarters
|
|
6998
AptarGroup
ATR
$8.05B
| $22.5K | ﹤0.01% |
180
-404
| -69% | -$49K |
2024 Q4
6 quarters
|
|
6999
Invesco S&P SmallCap High Dividend Low Volatility ETF
XSHD
$64.2M
| $22.5K | ﹤0.01% |
1,595
+692
| +77% | +$9.42K |
2026 Q1
1 quarter
|
|
|
COII
7000
PUT
DELISTED
REX COIN Covered Call ETF
COII
| $22.5K | ﹤0.01% |
1,200
+600
| +100% | +$5.63K |
2025 Q4
2 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.