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 |
Amazon
AMZN
|
+$168M |
| 2 |
NVIDIA
NVDA
|
+$141M |
| 3 |
TSMC
TSM
|
+$121M |
| 4 |
Meta Platforms (Facebook)
META
|
+$107M |
| 5 |
SPDR Gold Trust
GLD
|
+$103M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$174M |
| 2 |
Western Digital
WDC
|
+$87.7M |
| 3 |
Broadcom
AVGO
|
+$62.2M |
| 4 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$52M |
| 5 |
Netflix
NFLX
|
+$44.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 98.3% |
| 2 | Technology | 0.62% |
| 3 | Communication Services | 0.22% |
| 4 | Consumer Discretionary | 0.21% |
| 5 | Healthcare | 0.2% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | Held Since | |
|---|---|---|---|---|---|---|---|
6126
PUT
Franklin International Core Dividend Tilt Index ETF
DIVI
$2.62B
| $39K | ﹤0.01% |
900
+700
| +350% | +$28.6K |
2025 Q2
3 quarters
|
|
|
MBX
6127
MBX Biosciences
MBX
$2.72B
| $39K | ﹤0.01% |
1,307
-7,618
| -85% | -$259K |
2025 Q4
1 quarter
|
|
6128
Vuzix
VUZI
$243M
| $38.9K | ﹤0.01% |
+16,839
| New | +$46K |
2026 Q1
0 quarters
|
|
6129
CALL
National Vision
EYE
$1.3B
| $38.9K | ﹤0.01% |
1,500
+1,000
| +200% | +$27.2K |
2024 Q1
8 quarters
|
|
6130
PUT
Syntax Stratified LargeCap ETF
SSPY
$126M
| $38.8K | ﹤0.01% |
+1,500
| New | +$136K |
2026 Q1
0 quarters
|
|
6131
CALL
InfuSystem Holdings
INFU
$255M
| $38.8K | ﹤0.01% |
4,200
-2,900
| -41% | -$25.3K |
2025 Q3
2 quarters
|
|
6132
Immix Biopharma
IMMX
$848M
| $38.8K | ﹤0.01% |
+4,255
| New | +$31.2K |
2026 Q1
0 quarters
|
|
|
PBT
6133
CALL
Permian Basin Royalty Trust
PBT
$1.46B
| $38.7K | ﹤0.01% |
1,800
+1,300
| +260% | +$25.3K |
2021 Q2
19 quarters
|
|
6134
PUT
Encompass Health
EHC
$11.7B
| $38.7K | ﹤0.01% |
400
+300
| +300% | +$30.8K |
2025 Q1
4 quarters
|
|
6135
PUT
Veracyte
VCYT
$3.55B
| $38.7K | ﹤0.01% |
+1,200
| New | +$44.4K |
2026 Q1
0 quarters
|
|
6136
PUT
Byrna Technologies
BYRN
$81.4M
| $38.6K | ﹤0.01% |
4,200
+3,700
| +740% | +$48.5K |
2024 Q1
8 quarters
|
|
|
TONX
6137
CALL
TON Strategy Co
TONX
$200M
| $38.5K | ﹤0.01% |
15,600
-10,400
| -40% | -$26.1K |
2025 Q3
2 quarters
|
|
6138
CALL
ABM Industries
ABM
$2.84B
| $38.5K | ﹤0.01% |
1,000
-100
| -9% | -$4.33K |
2019 Q4
25 quarters
|
|
6139
PUT
iPath Bloomberg Commodity Index Total Return ETN due 12 June 2036
DJP
$875M
| $38.5K | ﹤0.01% |
800
| – | – |
2025 Q4
1 quarter
|
|
6140
CS Disco
LAW
$277M
| $38.5K | ﹤0.01% |
+10,069
| New | +$49.8K |
2026 Q1
0 quarters
|
|
6141
Everspin Technologies
MRAM
$454M
| $38.4K | ﹤0.01% |
4,366
-2,072
| -32% | -$22.8K |
2025 Q1
4 quarters
|
|
6142
PUT
American Financial Group
AFG
$11.4B
| $38.3K | ﹤0.01% |
+300
| New | +$39K |
2026 Q1
0 quarters
|
|
6143
Unicycive Therapeutics
UNCY
$127M
| $38.3K | ﹤0.01% |
+5,820
| New | +$38.1K |
2026 Q1
0 quarters
|
|
|
CTXRW
6144
CALL
DELISTED
Citius Pharmaceuticals, Inc. Warrant
CTXRW
| $38.3K | ﹤0.01% |
42,500
-22,900
| -35% | -$20.6K |
2025 Q2
3 quarters
|
|
|
TBLU
6145
CALL
Tortoise Global Water ETF
TBLU
$53.8M
| $38.1K | ﹤0.01% |
+900
| New | +$47.9K |
2026 Q1
0 quarters
|
|
|
JKS
6146
PUT
JinkoSolar
JKS
$487M
| $38.1K | ﹤0.01% |
1,500
-52,800
| -97% | -$1.39M |
2021 Q2
19 quarters
|
|
6147
CALL
ITT
ITT
$18.1B
| $38.1K | ﹤0.01% |
200
+100
| +100% | +$19K |
2020 Q3
22 quarters
|
|
|
AARD
6148
PUT
Aardvark Therapeutics
AARD
$115M
| $38.1K | ﹤0.01% |
+10,100
| New | +$105K |
2026 Q1
0 quarters
|
|
|
AFCG
6149
PUT
AFC Gamma
AFCG
$78.3M
| $38.1K | ﹤0.01% |
13,500
+9,300
| +221% | +$23.2K |
2025 Q3
2 quarters
|
|
|
FFWM
6150
DELISTED
First Foundation Inc
FFWM
| $38.1K | ﹤0.01% |
6,452
+6
| +0.1% | +$36 |
2025 Q4
1 quarter
|
|
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Simplex Trading's Q1 2026 Portfolio in Review
As of Q1 2026, Simplex Trading held 10,500 positions worth $149B, down 16% from $177B the previous quarter. Its ten largest holdings account for 51% of the portfolio.
Simplex Trading's Q1 2026 filing shows 2,157 new, 2,651 increased, 3,926 reduced and 1,574 closed positions. Its largest new stake was Amazon: 764,884 shares worth $159M. The largest sale was Apple, an estimated $174M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, up from 98% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q1 2026 buy was Amazon: 764,884 shares worth $159M.
- Simplex Trading added most to NVIDIA in Q1 2026, an estimated $141M increase.
- Simplex Trading's biggest Q1 2026 reduction was Apple, cutting an estimated $174M.
- Simplex Trading fully exited Direxion Daily Semiconductor Bull 3X ETF in Q1 2026, selling an estimated $52M.
- Simplex Trading's ten largest holdings make up 51% of its $149B portfolio in Q1 2026.
- Simplex Trading opened 2,157 new positions and closed 1,574 in Q1 2026.
- Simplex Trading's portfolio value fell 16% quarter-over-quarter to $149B.
Based on Simplex Trading's 13F filing for Q1 2026, filed 14 May 2026.