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 | |
|---|---|---|---|---|---|---|---|
6901
PUT
The Bancorp
TBBK
$2.07B
| $25.1K | ﹤0.01% |
400
+300
| +300% | +$17.2K |
2025 Q4
2 quarters
|
|
6902
PUT
Bain Capital Specialty
BCSF
$653M
| $25K | ﹤0.01% |
+2,000
| New | +$26.1K |
2026 Q2
0 quarters
|
|
6903
PUT
Trex
TREX
$5.13B
| $25K | ﹤0.01% |
500
-36,000
| -99% | -$1.49M |
2016 Q4
38 quarters
|
|
|
ATKR
6904
DELISTED
Atkore
ATKR
| $25K | ﹤0.01% |
329
-56
| -15% | -$4.22K |
2025 Q4
2 quarters
|
|
6905
CALL
CEMIG Preferred Shares
CIG
$6.58B
| $25K | ﹤0.01% |
11,900
+6,800
| +133% | +$15.8K |
2026 Q1
1 quarter
|
|
|
VFLQ
6906
CALL
DELISTED
Vanguard U.S. Liquidity Factor ETF
VFLQ
| $25K | ﹤0.01% |
100
| – | – |
2026 Q1
1 quarter
|
|
6907
YieldMax COIN Option Income Strategy ETF
CONY
$341M
| $24.9K | ﹤0.01% |
1,319
-6,539
| -83% | -$162K |
2025 Q2
4 quarters
|
|
6908
CALL
Protalix BioTherapeutics
PLX
$205M
| $24.9K | ﹤0.01% |
10,700
-14,400
| -57% | -$30.5K |
2026 Q1
1 quarter
|
|
6909
PUT
DELISTED
Avanos Medical
AVNS
| $24.9K | ﹤0.01% |
+1,000
| New | +$23.4K |
2026 Q2
0 quarters
|
|
6910
FirstCash
FCFS
$7.49B
| $24.9K | ﹤0.01% |
+115
| New | +$25K |
2026 Q2
0 quarters
|
|
6911
CALL
Momentus
MNTS
$47.2M
| $24.9K | ﹤0.01% |
+3,700
| New | +$29.7K |
2026 Q2
0 quarters
|
|
6912
CALL
Torrid Holdings
CURV
$204M
| $24.7K | ﹤0.01% |
13,200
-41,300
| -76% | -$72.2K |
2026 Q1
1 quarter
|
|
6913
Spyre Therapeutics
SYRE
$8.44B
| $24.7K | ﹤0.01% |
+278
| New | +$20.3K |
2026 Q2
0 quarters
|
|
6914
PUT
Arcus Biosciences
RCUS
$2.36B
| $24.7K | ﹤0.01% |
800
-1,500
| -65% | -$37.1K |
2022 Q1
17 quarters
|
|
6915
Cactus
WHD
$4.4B
| $24.6K | ﹤0.01% |
+480
| New | +$26.8K |
2026 Q2
0 quarters
|
|
6916
PUT
Mueller Industries
MLI
$11.8B
| $24.6K | ﹤0.01% |
400
-2,600
| -87% | -$170K |
2024 Q2
8 quarters
|
|
6917
Hagerty
HGTY
$1.76B
| $24.5K | ﹤0.01% |
2,059
+1,729
| +524% | +$18.5K |
2026 Q1
1 quarter
|
|
6918
First Trust NYSE Arca Biotechnology Index Fund
FBT
$2.96B
| $24.5K | ﹤0.01% |
99
+35
| +55% | +$7.54K |
2025 Q4
2 quarters
|
|
6919
PUT
US Gold Corp
USAU
$176M
| $24.5K | ﹤0.01% |
1,600
+500
| +45% | +$7.91K |
2025 Q1
5 quarters
|
|
6920
Vanguard Health Care ETF
VHT
$20.1B
| $24.5K | ﹤0.01% |
82
-135
| -62% | -$37.5K |
2026 Q1
1 quarter
|
|
6921
Schwab US TIPS ETF
SCHP
$16.4B
| $24.5K | ﹤0.01% |
925
+296
| +47% | +$7.9K |
2026 Q1
1 quarter
|
|
6922
CALL
Bitwise Crypto Industry Innovators ETF
BITQ
$347M
| $24.5K | ﹤0.01% |
1,000
-300
| -23% | -$7.59K |
2025 Q4
2 quarters
|
|
6923
CALL
Franklin BSP Realty Trust
FBRT
$518M
| $24.4K | ﹤0.01% |
3,000
+2,800
| +1,400% | +$24.3K |
2023 Q1
13 quarters
|
|
6924
PUT
One Liberty Properties
OLP
$489M
| $24.4K | ﹤0.01% |
1,000
| – | – |
2025 Q3
3 quarters
|
|
6925
PUT
Masco
MAS
$15B
| $24.4K | ﹤0.01% |
300
-8,800
| -97% | -$614K |
2018 Q1
33 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.