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 | |
|---|---|---|---|---|---|---|---|
|
TRIB
9076
Trinity Biotech
TRIB
$6.11M
| $137 | ﹤0.01% |
12
-7
| -37% | -$130 |
2026 Q1
1 quarter
|
|
9077
PUT
VolitionRx Ltd
VNRX
$5.08M
| $135 | ﹤0.01% |
100
+75
| +300% | +$181 |
2026 Q1
1 quarter
|
|
9078
CALL
Beam Global
BEEM
$21.1M
| $130 | ﹤0.01% |
100
-3,800
| -97% | -$5.83K |
2021 Q1
21 quarters
|
|
9079
Leverage Shares 2X Long CRM Daily ETF
CRMG
$55.1M
| $130 | ﹤0.01% |
+32
| New | +$173 |
2026 Q2
0 quarters
|
|
|
LCDL
9080
DELISTED
GraniteShares 2x Long LCID Daily ETF
LCDL
| $129 | ﹤0.01% |
145
-131
| -47% | -$130 |
2026 Q1
1 quarter
|
|
|
SLAI
9081
DELISTED
SOLAI Ltd ADS
SLAI
| $128 | ﹤0.01% |
40
-11
| -22% | -$54 |
2025 Q2
4 quarters
|
|
9082
IRIDEX
IRIX
$13.4M
| $128 | ﹤0.01% |
112
-48
| -30% | -$51 |
2025 Q3
3 quarters
|
|
9083
PUT
Grove Collaborative
GROV
$43.1M
| $125 | ﹤0.01% |
+100
| New | +$123 |
2026 Q2
0 quarters
|
|
9084
Sensient Technologies
SXT
$5.57B
| $123 | ﹤0.01% |
+1
| New | +$111 |
2026 Q2
0 quarters
|
|
9085
JPMorgan US Value Factor ETF
JVAL
$1.03B
| $117 | ﹤0.01% |
2
-33
| -94% | -$1.82K |
2026 Q1
1 quarter
|
|
9086
Sprott Active Gold & Silver Miners ETF
GBUG
$155M
| $117 | ﹤0.01% |
3
-36
| -92% | -$1.6K |
2025 Q4
2 quarters
|
|
9087
DELISTED
Inotiv
NOTV
| $116 | ﹤0.01% |
11,608
-13,466
| -54% | -$3.52K |
2024 Q4
6 quarters
|
|
9088
PUT
Sui Group Holdings
SUIG
$91.4M
| $115 | ﹤0.01% |
+100
| New | +$144 |
2026 Q2
0 quarters
|
|
|
9089
PUT
IRIDEX
IRIX
$13.4M
| $114 | ﹤0.01% |
+100
| New | +$107 |
2026 Q2
0 quarters
|
|
9090
GraniteShares YieldBOOST PLTR ETF
PLYY
$2.23M
| $114 | ﹤0.01% |
13
-552
| -98% | -$5.78K |
2025 Q4
2 quarters
|
|
9091
CoinShares PLC
CSHR
$531M
| $113 | ﹤0.01% |
+30
| New | +$158 |
2026 Q2
0 quarters
|
|
9092
PUT
SkyAI Inc
SKYA
$124M
| $111 | ﹤0.01% |
100
-600
| -86% | -$962 |
2025 Q4
2 quarters
|
|
|
QVCGA
9093
DELISTED
QVC Group Inc Series A
QVCGA
| $110 | ﹤0.01% |
+1,000
| New | +$1.59K |
2026 Q2
0 quarters
|
|
9094
PUT
Cardiol Therapeutics
CRDL
$140M
| $106 | ﹤0.01% |
+100
| New | +$127 |
2026 Q2
0 quarters
|
|
9095
Grayscale XRP Trust ETF
GXRP
$61.4M
| $101 | ﹤0.01% |
+5
| New | +$127 |
2026 Q2
0 quarters
|
|
9096
Natural Health Trends
NHTC
$7.17M
| $100 | ﹤0.01% |
57
-1,411
| -96% | -$3.7K |
2024 Q1
9 quarters
|
|
9097
CALL
CXApp
CXAI
$4.35M
| $93 | ﹤0.01% |
10
-18
| -64% | -$166 |
2024 Q3
7 quarters
|
|
9098
iMGP DBi Managed Futures Strategy ETF
DBMF
$4.39B
| $91 | ﹤0.01% |
3
-756
| -100% | -$23.2K |
2025 Q4
2 quarters
|
|
9099
Werewolf Therapeutics
HOWL
$49.1M
| $91 | ﹤0.01% |
255
-32,271
| -99% | -$19.7K |
2023 Q2
12 quarters
|
|
9100
Invesco Global Water ETF
PIO
$269M
| $89 | ﹤0.01% |
+2
| New | +$90 |
2026 Q2
0 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.