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 | |
|---|---|---|---|---|---|---|---|
8776
Innovex International
INVX
$2.09B
| $1.29K | ﹤0.01% |
52
-63
| -55% | -$1.71K |
2025 Q1
5 quarters
|
|
8777
PUT
Alight
ALIT
$252M
| $1.29K | ﹤0.01% |
115
-14,980
| -99% | -$212K |
2024 Q1
9 quarters
|
|
8778
PUT
San Juan Basin Royalty Trust
SJT
$157M
| $1.28K | ﹤0.01% |
400
-10,400
| -96% | -$41.9K |
2025 Q1
5 quarters
|
|
8779
Haverty Furniture Companies
HVT
$458M
| $1.28K | ﹤0.01% |
50
-45
| -47% | -$1.02K |
2026 Q1
1 quarter
|
|
8780
Pacira BioSciences
PCRX
$1.45B
| $1.27K | ﹤0.01% |
50
-6
| -11% | -$142 |
2026 Q1
1 quarter
|
|
8781
CALL
US Global Investors
GROW
$32M
| $1.25K | ﹤0.01% |
400
| – | – |
2025 Q3
3 quarters
|
|
8782
PUT
MaxCyte
MXCT
$144M
| $1.23K | ﹤0.01% |
1,000
| – | – |
2026 Q1
1 quarter
|
|
8783
Home BancShares
HOMB
$6.03B
| $1.23K | ﹤0.01% |
+43
| New | +$1.17K |
2026 Q2
0 quarters
|
|
8784
Zevia
ZVIA
$91.6M
| $1.23K | ﹤0.01% |
+753
| New | +$1.02K |
2026 Q2
0 quarters
|
|
8785
CeriBell Inc
CBLL
$1.04B
| $1.2K | ﹤0.01% |
+62
| New | +$1.18K |
2026 Q2
0 quarters
|
|
8786
Clean Harbors
CLH
$16.9B
| $1.2K | ﹤0.01% |
4
-681
| -99% | -$201K |
2025 Q3
3 quarters
|
|
8787
YieldMax AAPL Option Income Strategy ETF
APLY
$122M
| $1.19K | ﹤0.01% |
+103
| New | +$1.25K |
2026 Q2
0 quarters
|
|
8788
WisdomTree International AI Enhanced Value Fund
AIVI
$60.2M
| $1.18K | ﹤0.01% |
21
+9
| +75% | +$511 |
2026 Q1
1 quarter
|
|
|
IMMP
8789
CALL
Immutep
IMMP
$23.8M
| $1.17K | ﹤0.01% |
140
-470
| -77% | -$4.09K |
2024 Q3
7 quarters
|
|
8790
CALL
DMC Global
BOOM
$111M
| $1.16K | ﹤0.01% |
200
-200
| -50% | -$1.3K |
2024 Q1
9 quarters
|
|
8791
GraniteShares 2x Short TSLA Daily ETF
TSDD
$25.7M
| $1.16K | ﹤0.01% |
165
-584
| -78% | -$5.06K |
2026 Q1
1 quarter
|
|
8792
PUT
Owlet
OWLT
$118M
| $1.15K | ﹤0.01% |
200
-1,000
| -83% | -$5.28K |
2026 Q1
1 quarter
|
|
8793
Roundhill PLTR WeeklyPay ETF
PLTW
$134M
| $1.14K | ﹤0.01% |
+69
| New | +$1.5K |
2026 Q2
0 quarters
|
|
8794
Fathom Holdings
FTHM
$6.41M
| $1.14K | ﹤0.01% |
1,130
-3,952
| -78% | -$3.1K |
2023 Q4
10 quarters
|
|
8795
Invesco Alerian Galaxy Crypto Economy ETF
SATO
$6.88M
| $1.14K | ﹤0.01% |
70
| – | – |
2026 Q1
1 quarter
|
|
8796
CALL
FT Vest Nasdaq-100 Moderate Buffer ETF - February
QMFE
$44.5M
| $1.14K | ﹤0.01% |
100
-1,000
| -91% | -$23.8K |
2026 Q1
1 quarter
|
|
8797
PUT
Venu Holding Corp
VENU
$74.6M
| $1.14K | ﹤0.01% |
500
+400
| +400% | +$1.43K |
2026 Q1
1 quarter
|
|
8798
Nano Labs
NA
$37.6M
| $1.11K | ﹤0.01% |
+602
| New | +$1.38K |
2026 Q2
0 quarters
|
|
|
8799
PUT
Nano Labs
NA
$37.6M
| $1.11K | ﹤0.01% |
600
| – | – |
2025 Q2
4 quarters
|
|
8800
Good Times Restaurants
GTIM
$13.6M
| $1.1K | ﹤0.01% |
780
+727
| +1,372% | +$932 |
2026 Q1
1 quarter
|
|
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.